CA2094489C - Plastic container package with linerless sealing closure system - Google Patents
Plastic container package with linerless sealing closure system Download PDFInfo
- Publication number
- CA2094489C CA2094489C CA002094489A CA2094489A CA2094489C CA 2094489 C CA2094489 C CA 2094489C CA 002094489 A CA002094489 A CA 002094489A CA 2094489 A CA2094489 A CA 2094489A CA 2094489 C CA2094489 C CA 2094489C
- Authority
- CA
- Canada
- Prior art keywords
- flange
- closure
- threaded finish
- container
- finish
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
- B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
- B65D41/04—Threaded or like caps or cap-like covers secured by rotation
- B65D41/0407—Threaded or like caps or cap-like covers secured by rotation with integral sealing means
- B65D41/0428—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a collar, flange, rib or the like contacting the top rim or the top edges or the external surface of a container neck
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S215/00—Bottles and jars
- Y10S215/01—Fins
Abstract
A plastic container closure package with a linerless sealing closure system comprising a plastic container having a threaded finish for receiving a closure having a base wall and an internal skirt with complementary threads on the skirt. The plastic container is made by a process wherein a tube of molten plastic is inflated and blown to form the container and thereafter the tube is trimmed to form the sealing surface of the finish of the container. The closure includes an annular flange that extends downwardly from the underside of the base wall of the closure and radially inwardly of the closure for engagement with the container. The annular flange includes a smooth continuous frustoconical surface that faces the finish of the container and engages the inner edge at the juncture of the top surface and inside surface of the finish of the container. An annular stop extends axially from the underside of the base wall of the closure to limit the flexing of the annular flange.
The width of the flange is such that the free end thereof normally extends beyond the inner edge of the finish into sealing this engagement intermediate the free edge and the end of the flange.
The width of the flange is such that the free end thereof normally extends beyond the inner edge of the finish into sealing this engagement intermediate the free edge and the end of the flange.
Description
This invention relates to a plastic container package including a linerless sealing closure system.
Background and Summary of bhe Tnvention When plastic containers are utilized to retain liquids such as oil or water, it has been found that it is necessary that the closure utilized with the container have a separate liner in order to provide an adequate seal. The problem of sealing is made even more complex where the plastic container is made by closing molds about a tube of molten plastic material and blowing the tube followed by thereafter cutting and trimming the portion of the tube that has been blown into a finish to provide a sealing surface on the upper end of the finish. The trimming process often results in variation in the plane of the finish at circumferentially spaced points along the sealing surface as well as non-uniformity in ax radial direction. The trimming process can result in variations in height circumferentially of the finish, known as '°trim slant°'. The trimming can also result in the top surface being inclined rather than being perpendicular to the longitudinal axis of the container. Tn addition, in such a molding process wherein the tube is extruded variations in diameter of the finish can occur circumferentially known as ovality. Each of these conditions can result in failure of the seal so that it has thought to be necessary to utilize a sealing liner in the closure. Sealing _1-on such a container is also made more difficult due to variations or imperfections in the seam produced adjacent the juncture of the closed molds.
Various patents have been proposed including flanges extending radially outwardly and inwardly as shown in United States patents 3,053,406, 3,067,900, 3,255,909, 3,393,818, 3,$02,590, 4,069,937, 4,196,818, 4,220,250, 4,398,645, 4,422,947, 4,450,973, 4,598,835, 4,739,893 and 4,872,304.
As far as the present inventor is aware, none of these patents has been directed to the problems of the present invention or resulted in a satisfactory package for liquids.
Among the objectives of the present invention are to provide a package for a plastic container made by the aforementioned process which does not require a separate liner and utilizes a linerless sealing closure system which will compensate for any unevenness and out-of-round top surfaces on the finish of the container; and which container package will be capable of packaging oil, water or similar fluids.
In accordance with the invention a plastic container closure package with a linerless sealing closure system comprising a plastic container having a threaded finish for receiving a closure having a base wall and an internal skirt with complementary threads on the skirt. The plastic container is made by a process wherein a tube of molten plastic is inflated and blown to form the container and thereafter the tube is ~~~~~s'~
trimmed to form the sealing surface of the finish of the container. The closure includes an annular flange that extends downwardly from the underside of the base wall of the closure and radially inwardly of the closure for engagement with the sealing surface on the container. The annular flange includes a smooth continuous frustoconical surface that faces the finish of the container and engages the inner edge at the juncture of the top surface and inside surface of the finish of the container.
An annular stop extends axially from the underside of the base wall of the closure to limit the flexing of the annular flange.
The width of the flange is such that the free end thereof normally extends beyond the inner edge of the finish surface into sealing engagement intermediate the free edge and the end of the flange.
Background and Summary of bhe Tnvention When plastic containers are utilized to retain liquids such as oil or water, it has been found that it is necessary that the closure utilized with the container have a separate liner in order to provide an adequate seal. The problem of sealing is made even more complex where the plastic container is made by closing molds about a tube of molten plastic material and blowing the tube followed by thereafter cutting and trimming the portion of the tube that has been blown into a finish to provide a sealing surface on the upper end of the finish. The trimming process often results in variation in the plane of the finish at circumferentially spaced points along the sealing surface as well as non-uniformity in ax radial direction. The trimming process can result in variations in height circumferentially of the finish, known as '°trim slant°'. The trimming can also result in the top surface being inclined rather than being perpendicular to the longitudinal axis of the container. Tn addition, in such a molding process wherein the tube is extruded variations in diameter of the finish can occur circumferentially known as ovality. Each of these conditions can result in failure of the seal so that it has thought to be necessary to utilize a sealing liner in the closure. Sealing _1-on such a container is also made more difficult due to variations or imperfections in the seam produced adjacent the juncture of the closed molds.
Various patents have been proposed including flanges extending radially outwardly and inwardly as shown in United States patents 3,053,406, 3,067,900, 3,255,909, 3,393,818, 3,$02,590, 4,069,937, 4,196,818, 4,220,250, 4,398,645, 4,422,947, 4,450,973, 4,598,835, 4,739,893 and 4,872,304.
As far as the present inventor is aware, none of these patents has been directed to the problems of the present invention or resulted in a satisfactory package for liquids.
Among the objectives of the present invention are to provide a package for a plastic container made by the aforementioned process which does not require a separate liner and utilizes a linerless sealing closure system which will compensate for any unevenness and out-of-round top surfaces on the finish of the container; and which container package will be capable of packaging oil, water or similar fluids.
In accordance with the invention a plastic container closure package with a linerless sealing closure system comprising a plastic container having a threaded finish for receiving a closure having a base wall and an internal skirt with complementary threads on the skirt. The plastic container is made by a process wherein a tube of molten plastic is inflated and blown to form the container and thereafter the tube is ~~~~~s'~
trimmed to form the sealing surface of the finish of the container. The closure includes an annular flange that extends downwardly from the underside of the base wall of the closure and radially inwardly of the closure for engagement with the sealing surface on the container. The annular flange includes a smooth continuous frustoconical surface that faces the finish of the container and engages the inner edge at the juncture of the top surface and inside surface of the finish of the container.
An annular stop extends axially from the underside of the base wall of the closure to limit the flexing of the annular flange.
The width of the flange is such that the free end thereof normally extends beyond the inner edge of the finish surface into sealing engagement intermediate the free edge and the end of the flange.
Description of the Drawings FIG. 1 is a fragmentary sectional view on an enlarged scale of a container package embodying the invention;
FIG. 2 is a fragmentary sectional view on an enlarged scale of a portion of the package shown in FIG. 1;
FIG. 3 is a fragmentary sectional view of a portion of the closure before application to the container;
FIGS. 4, 5 and 6 are fragmentary sectional views of closure packages which show the manner in which the closure compensates for variations in height and non-perpendicular surfaces on the finish of the container.
FIG. 7 is a view similar to FIG. 2 of a modified form of closure that can be used in the container package.
_4_ r~e~cri~ti~n In accordance with the invention, a plastic container closure package 10 with a linerless sealing closure system comprising a plastic container 12 having an external threaded finish 13 for receiving a plastic closure 19 which has a base wall 15 and an integral skirt 16 with complementary threads 17 on the skirt 16.
The plastic container 12 is made by a process wherein a tube of molten plastic is extruded, blow molds are closed over the tube and the tube is blown to form the container.
Thereafter the tube finish or neck of the container is trimmed to form the sealing surface of the finish of the container.
The trimming process can result in variations in height circumferentially of the finish, known as "trim slant". The trimming can also result in the top surface being inclined rather than being perpendicular to the longitudinal axis of the container. In addition, in such a molding process wherein the tube is extruded variations in diameter of the finish can occur circumferentially known as ovality. Each of these conditions can result in failure of the seal so that it has thought to be necessary to utilize a sealing liner in the closure. Sealing on such a container is also made more difficult due to variations or imperfections in the seam produced adjacent the juncture of the closed molds.
_5_ The trimmed container is intended to provide a top surface 18 which is perpendicular to the longitudinal axis of the container 12.
The closure 14 includes an annular flange 20 that extends downwardly from the underside of the base wall 15 of the closure 14 and radially inwardly of the closure 14 for engagement with the container 12. The annular flange 20 includes a smooth continuous frustoconical surface 21 that faces the finish 13 of the container 12 and is designed to engage the inner edge 22 at the juncture of the top surface 18 and inner surface 23 of the finish 13. The flange 20 includes a free annular edge 24 that is rounded at least at portion facing the finish 13. The width of the flange 20 i~ such that the free edge 24 thereof normally extends beyond the top surface 18 into sealing engagement intermediate the free edge 24 and the other end of the flange 20 extending from the underside of the base wall 15. The flange 20 has its greatest thickness adjacent the base wall 15 and tapers and converges toward the free edge 24.
An annular stop 25 extends axially from the underside of the base wall 15 of the closure 14 to limit the flexing of the annular flange 20.
The container and closure axe preferably made of high density polyethylene but may also be made of other plastics such as other polyethylenes or polypropylenes.
_6_ The closure 14 also preferably includes a tamper indicating band B connected to the skirt l6 along a weakended line L, such as Shawn in United States app2ication Serial No.
07/386, 391 f fled July 27, 1989.
The closure system forming part of package will ac-commodate for unevenness and out,-of-round canditions.
For example ie as shown in FIG. 4, the level or axial distance between one side of the container top surface as at 18a and differs from the other side 18b, known as trim slant, the differential flexing along the periphery of the flange 20 accommodates for the variation in height of the top surface 18.
As shown in FIG. 5, if the top surface 18c is cut so that it is inclined on one side so that it tapers downwardly and axially inwardly, the flange 20 will also accommodate such situations or variation.
If as shown in FIG. 6, the top surface 18d is tapered in the opposite direction from that shown in FIG. 5, the annular flange 20 will also provide a proper seal. If there is a variation in out-of-round condition of the (finish, the ability of the flange 20 to engage at various portions along its width will accommodate and provide the satisfactory seal under those conditions.
It has been found that in tests as represented by the following, the plastic container package with linerless sealing _~~_ closure system effectively seals the package where the contents are, for example, liquids such as motor oil or water and the like.
In the form shown in FIG. 7, the flange 20a has a partial rounded free edge 24a facing the finish 13 to facilitate manufacture.
It can thus be seen that the container package effectively compensates for time slant, non-perpendicularity of the top surface of the finish and ovality of the finish. In addition since the sealing is designed to occur at the inner edge of the juncture of the top surface and inside surface of the finish, the problems of sealing at the seam of the container are obviated. Furthermore since the seal is at the inner edge of the finish, the liquid is kept from the seal area.
The container package will provide a satisfactory 1S seal even though the container can vary from the ideal as indicated in the following representative measurement of diameters, ovality and trim slant of 32oz high density polyethylene bottles from different cavities made by the extrusion, blow and trim process heretofore described:
_g_ ~~~'~a~
B
Diameter Ovality Trim Slant _Min./Maxaver ovality aver ovality .9 .981 .020" 1.099 .016" 018"
1/.991 .966/.986.976 .020 1.095 .014 .
.967/.990.979 .023 1.096 .020 .
.971/.986.979 .015 1,097 .012 .
.975/.990.983 .015 1.098 .015 .
.970/.988.979 .018 1.094 .018 .
.020 .970/.979.975 .009 1.G~92 .010 020 .965/.978.9?2 .013 1.090 .012 .
.964/.978.971 .014 1.091 .016 .
.954/.980.967 .026 1.087 .018 .
.967/.981.974 .014 1.093 .015 .
.961/.981.971 .020 1.094 .016 .
.016 .960/.980.970 .020 1.094 .017 028 .959/,984.972 .025 1.094 .023 .
.958/.983.971 .025 1.094 .019 .
.955/.968.962 .013 1.089 .010 .
.027 .961/.977.969 .016 1.092 .011 .016 .960/.972.966 .012 1.092 .011 .021 Tests performed on container packages with motor oil utilizing prior art closures with a liner as a standard or contest and container packages for oil embodying the invention show no leakage within 24 hours or one week when case containing such packages were inverted and stand on pallets under warehouse conditions.
It can thus be seen that there has been provided a package for a plastic container made by the aforementioned process which does riot require a separate liner and utilizes a linerless sealing closure system which will compensate far any _g_ unevenness and out-of-round top surfaces on the finish of the container; and which container package will be capable of packaging oil, water or similar fluids.
_1p_
FIG. 2 is a fragmentary sectional view on an enlarged scale of a portion of the package shown in FIG. 1;
FIG. 3 is a fragmentary sectional view of a portion of the closure before application to the container;
FIGS. 4, 5 and 6 are fragmentary sectional views of closure packages which show the manner in which the closure compensates for variations in height and non-perpendicular surfaces on the finish of the container.
FIG. 7 is a view similar to FIG. 2 of a modified form of closure that can be used in the container package.
_4_ r~e~cri~ti~n In accordance with the invention, a plastic container closure package 10 with a linerless sealing closure system comprising a plastic container 12 having an external threaded finish 13 for receiving a plastic closure 19 which has a base wall 15 and an integral skirt 16 with complementary threads 17 on the skirt 16.
The plastic container 12 is made by a process wherein a tube of molten plastic is extruded, blow molds are closed over the tube and the tube is blown to form the container.
Thereafter the tube finish or neck of the container is trimmed to form the sealing surface of the finish of the container.
The trimming process can result in variations in height circumferentially of the finish, known as "trim slant". The trimming can also result in the top surface being inclined rather than being perpendicular to the longitudinal axis of the container. In addition, in such a molding process wherein the tube is extruded variations in diameter of the finish can occur circumferentially known as ovality. Each of these conditions can result in failure of the seal so that it has thought to be necessary to utilize a sealing liner in the closure. Sealing on such a container is also made more difficult due to variations or imperfections in the seam produced adjacent the juncture of the closed molds.
_5_ The trimmed container is intended to provide a top surface 18 which is perpendicular to the longitudinal axis of the container 12.
The closure 14 includes an annular flange 20 that extends downwardly from the underside of the base wall 15 of the closure 14 and radially inwardly of the closure 14 for engagement with the container 12. The annular flange 20 includes a smooth continuous frustoconical surface 21 that faces the finish 13 of the container 12 and is designed to engage the inner edge 22 at the juncture of the top surface 18 and inner surface 23 of the finish 13. The flange 20 includes a free annular edge 24 that is rounded at least at portion facing the finish 13. The width of the flange 20 i~ such that the free edge 24 thereof normally extends beyond the top surface 18 into sealing engagement intermediate the free edge 24 and the other end of the flange 20 extending from the underside of the base wall 15. The flange 20 has its greatest thickness adjacent the base wall 15 and tapers and converges toward the free edge 24.
An annular stop 25 extends axially from the underside of the base wall 15 of the closure 14 to limit the flexing of the annular flange 20.
The container and closure axe preferably made of high density polyethylene but may also be made of other plastics such as other polyethylenes or polypropylenes.
_6_ The closure 14 also preferably includes a tamper indicating band B connected to the skirt l6 along a weakended line L, such as Shawn in United States app2ication Serial No.
07/386, 391 f fled July 27, 1989.
The closure system forming part of package will ac-commodate for unevenness and out,-of-round canditions.
For example ie as shown in FIG. 4, the level or axial distance between one side of the container top surface as at 18a and differs from the other side 18b, known as trim slant, the differential flexing along the periphery of the flange 20 accommodates for the variation in height of the top surface 18.
As shown in FIG. 5, if the top surface 18c is cut so that it is inclined on one side so that it tapers downwardly and axially inwardly, the flange 20 will also accommodate such situations or variation.
If as shown in FIG. 6, the top surface 18d is tapered in the opposite direction from that shown in FIG. 5, the annular flange 20 will also provide a proper seal. If there is a variation in out-of-round condition of the (finish, the ability of the flange 20 to engage at various portions along its width will accommodate and provide the satisfactory seal under those conditions.
It has been found that in tests as represented by the following, the plastic container package with linerless sealing _~~_ closure system effectively seals the package where the contents are, for example, liquids such as motor oil or water and the like.
In the form shown in FIG. 7, the flange 20a has a partial rounded free edge 24a facing the finish 13 to facilitate manufacture.
It can thus be seen that the container package effectively compensates for time slant, non-perpendicularity of the top surface of the finish and ovality of the finish. In addition since the sealing is designed to occur at the inner edge of the juncture of the top surface and inside surface of the finish, the problems of sealing at the seam of the container are obviated. Furthermore since the seal is at the inner edge of the finish, the liquid is kept from the seal area.
The container package will provide a satisfactory 1S seal even though the container can vary from the ideal as indicated in the following representative measurement of diameters, ovality and trim slant of 32oz high density polyethylene bottles from different cavities made by the extrusion, blow and trim process heretofore described:
_g_ ~~~'~a~
B
Diameter Ovality Trim Slant _Min./Maxaver ovality aver ovality .9 .981 .020" 1.099 .016" 018"
1/.991 .966/.986.976 .020 1.095 .014 .
.967/.990.979 .023 1.096 .020 .
.971/.986.979 .015 1,097 .012 .
.975/.990.983 .015 1.098 .015 .
.970/.988.979 .018 1.094 .018 .
.020 .970/.979.975 .009 1.G~92 .010 020 .965/.978.9?2 .013 1.090 .012 .
.964/.978.971 .014 1.091 .016 .
.954/.980.967 .026 1.087 .018 .
.967/.981.974 .014 1.093 .015 .
.961/.981.971 .020 1.094 .016 .
.016 .960/.980.970 .020 1.094 .017 028 .959/,984.972 .025 1.094 .023 .
.958/.983.971 .025 1.094 .019 .
.955/.968.962 .013 1.089 .010 .
.027 .961/.977.969 .016 1.092 .011 .016 .960/.972.966 .012 1.092 .011 .021 Tests performed on container packages with motor oil utilizing prior art closures with a liner as a standard or contest and container packages for oil embodying the invention show no leakage within 24 hours or one week when case containing such packages were inverted and stand on pallets under warehouse conditions.
It can thus be seen that there has been provided a package for a plastic container made by the aforementioned process which does riot require a separate liner and utilizes a linerless sealing closure system which will compensate far any _g_ unevenness and out-of-round top surfaces on the finish of the container; and which container package will be capable of packaging oil, water or similar fluids.
_1p_
Claims (13)
1. A plastic closure adapted for use with a plastic container and closure package for liquids with a linerless sealing closure system wherein the plastic container of the package has a threaded finish for receiving said closure, and the threaded finish has an upper and axially above the thread with a substantially flat top surface, an outer surface and an inner surface, the outer surface and inner surface each intersecting the top surface to respectively define therewith an outer edge and an inner edge, and wherein the threaded finish may have at least one variation comprising at least one of a variation in height circumferentially of the top surface of said threaded finish; a variation in inclination of the top surface of said threaded finish; a variation in out-of round; a variation in ovality of said threaded finish, and a variation in a mold seam produced adjacent a juncture formed by closed molds used in making the container;
said plastic closure comprising a base wall and a peripheral skirt with. a thread on the skirt adapted for threadably engaging the container thread, said closure base wall having an underside, said closure including a single integral annular flexible and resilient flange that extends downwardly from the underside of the base wall of the closure and radially inwardly of the closure, and a continuous annular stop that extends axially from the underside of the base wall, said annular flexible flange having a smooth continuous frustoconical surface adapted to face said threaded finish and terminating in a free edge, a portion of said flange adjacent the base wall of the closure being adapted to overlie the top surface of the threaded finish when said closure is threadably received on the threaded finish and being constructed to be normally out of contact with the base wall and for engaging the inner edge of the threaded finish to provide sailing engagement with such inner edge when the closure is fully applied by threading the closure onto the container, such that the flange is constructed to be free of any contact with the outer edge of the threaded finish at all times wherein a variation in the molding seam may interfere with sealing, and said flange being adapted to comprise the sole sealing engagement with said upper end of the threaded finish when the closure is fully applied onto the container and adapted to then accommodate any such variations in height and inclination in the top surface of the threaded finish, out-of-round and ovality of the threaded finish, and imperfections in the seam produced in the threaded finish adjacent the juncture of closed molds used in making the container, the width and position of the flange being such that the free edge thereof is adapted to normally extend beyond the inner edge of the threaded finish and the sealing engagement is normally intermediate the free edge of said flange and said base wall, when the closure is fully applied onto the container, said flange being capable of resiliently flexing intermediate the free edge and the portion adjacent the base wall such that the free edge may move toward the base wall and such that the flange is capable of flexing differentially about the periphery of the flange when fully applied onto the container, such that if there is a variation in which the height of the top surface of the threaded finish varies circumferentially, the flange is adapted to flex differentially about the periphery of the flange, and such that if there is a variation in the top surface of the threaded finish being inclined downwardly and inwardly on one side, the flange is adapted to flex differentially about the periphery of the flange, and such that if there is a variation in the top surface of the threaded finish being inclined downwardly and outwardly, the flange is adapted to flex differentially about the periphery of the flange, and such that if there is a non-uniformity or variation in a radial direction in the threaded finish such as being out-of-round or having ovality, the flange is adapted to flex differentially to engage the inner edge of the threaded finish at portions of its width, and so that the closure is adapted to effectively sealably accommodate any such variations in height and inclination of the top surface of the threaded finish due to trimming and any such variations in out-of-round or ovality of the threaded finish or imperfections produced adjacent a juncture of closed molds used in making the container.
said plastic closure comprising a base wall and a peripheral skirt with. a thread on the skirt adapted for threadably engaging the container thread, said closure base wall having an underside, said closure including a single integral annular flexible and resilient flange that extends downwardly from the underside of the base wall of the closure and radially inwardly of the closure, and a continuous annular stop that extends axially from the underside of the base wall, said annular flexible flange having a smooth continuous frustoconical surface adapted to face said threaded finish and terminating in a free edge, a portion of said flange adjacent the base wall of the closure being adapted to overlie the top surface of the threaded finish when said closure is threadably received on the threaded finish and being constructed to be normally out of contact with the base wall and for engaging the inner edge of the threaded finish to provide sailing engagement with such inner edge when the closure is fully applied by threading the closure onto the container, such that the flange is constructed to be free of any contact with the outer edge of the threaded finish at all times wherein a variation in the molding seam may interfere with sealing, and said flange being adapted to comprise the sole sealing engagement with said upper end of the threaded finish when the closure is fully applied onto the container and adapted to then accommodate any such variations in height and inclination in the top surface of the threaded finish, out-of-round and ovality of the threaded finish, and imperfections in the seam produced in the threaded finish adjacent the juncture of closed molds used in making the container, the width and position of the flange being such that the free edge thereof is adapted to normally extend beyond the inner edge of the threaded finish and the sealing engagement is normally intermediate the free edge of said flange and said base wall, when the closure is fully applied onto the container, said flange being capable of resiliently flexing intermediate the free edge and the portion adjacent the base wall such that the free edge may move toward the base wall and such that the flange is capable of flexing differentially about the periphery of the flange when fully applied onto the container, such that if there is a variation in which the height of the top surface of the threaded finish varies circumferentially, the flange is adapted to flex differentially about the periphery of the flange, and such that if there is a variation in the top surface of the threaded finish being inclined downwardly and inwardly on one side, the flange is adapted to flex differentially about the periphery of the flange, and such that if there is a variation in the top surface of the threaded finish being inclined downwardly and outwardly, the flange is adapted to flex differentially about the periphery of the flange, and such that if there is a non-uniformity or variation in a radial direction in the threaded finish such as being out-of-round or having ovality, the flange is adapted to flex differentially to engage the inner edge of the threaded finish at portions of its width, and so that the closure is adapted to effectively sealably accommodate any such variations in height and inclination of the top surface of the threaded finish due to trimming and any such variations in out-of-round or ovality of the threaded finish or imperfections produced adjacent a juncture of closed molds used in making the container.
2. The plastic closure as set forth in claim 1 wherein the free edge of such flange underlies such stop but is constructed to be normally out of engagement with said stop so that said stop provides an end limit to the range of the flexing of said annular flange toward said closure base wall.
3. The plastic closure set forth in claim 2 wherein said flange has its greater width in cross section radially of said closure adjacent the base wall of the closure and has sides converging toward the free edge of said flange.
4. The plastic closure set forth in claim 3 wherein the free edge of said flange is rounded at least along a portion thereof adapted to face the threaded finish.
5. The plastic closure set forth in claim 4 wherein the entire free edge of said flange is rounded.
6. The closure set forth in claim 5 wherein said closure and the container are made of high density polyethylene.
7. A plastic container and closure package for liquids with a linerless sealing closure system comprising:
a plastic container having a threaded finish for receiving a closure, said threaded finish having a top surface and inner and outer surfaces intersecting said top surface to define an inner edge and an outer edge respectively, wherein said threaded finish may have variations circumferentially in height and inclination of the top surface of said threaded finish, non-uniformity in a direction radially of the threaded finish such as out-of-roundness or ovality of the threaded finish of the plastic container, and imperfections produced adjacent a juncture of closed molds used in making the container, a plastic closure having a base wall and a peripheral skirt with complementary threads on the skirt engaging said threaded finish, said base wall having an underside, said closure including an annular flexible flange that extends downwardly from the underside of the base wall of the closure and radially inwardly of the closure, said annular flexible flange having a smooth continuous frustoconical surface facing said threaded finish and a free edge, a portion of the flange adjacent the base wall of the closure overlying the top surface of the threaded finish, said flange normally engaging the inner edge of said threaded finish of said container to provide sealing~
engagement with said inner edge, said flange comprising the sole sealing engagement with said threaded finish of said plastic container and accommodating variations in height and inclination in the top surface of said threaded finish, non-uniformity in a direction radially of the threaded finish such as out-of-roundness or ovality of the threaded finish of the plastic container, and imperfections in the seam produced adjacent the juncture of closed molds used in making the container, the width and position of the flange being such that the free edge thereof normally extends beyond the inner edge of the threaded finish and the sealing engagement is normally intermediate the free edge of said flange and said base wall, said flange being capable of flexing intermediate the free edge and the portion adjacent the base wall such that the free edge may move toward the base wall and such that the flange is capable of flexing differentially about the periphery of the flange such that if the height of the top surface of the threaded finish varies circumferentially, the flange, and flex differently about the periphery of the flange, and such that if the top surface of the threaded finish is inclined downwardly and inwardly on one side, the flange will flex differentially about the periphery of the flange, and such that if the top surface of the threaded finish is inclined downwardly and outwardly, the flange will flex differentially about the periphery of the flange, and such that if the threaded finish is non-uniform in a direction radially of the threaded finish such as being out-of-round or having ovality, the flange will flex differentially to engage the inner edge of the threaded finish at different portions of its width, and such that the flange is free of any contact with the outer edge of the threaded finish wherein a molding seam may interfere with sealing, and such that the closure effectively accommodates any such variations in height and inclination of the top surface of the threaded finish due to trimming and such variations in out-of-roundness or ovality or other non-uniformity in a direction radially of the threaded finish or imperfections in the seam produced adjacent the juncture of closed molds used in making the container.
a plastic container having a threaded finish for receiving a closure, said threaded finish having a top surface and inner and outer surfaces intersecting said top surface to define an inner edge and an outer edge respectively, wherein said threaded finish may have variations circumferentially in height and inclination of the top surface of said threaded finish, non-uniformity in a direction radially of the threaded finish such as out-of-roundness or ovality of the threaded finish of the plastic container, and imperfections produced adjacent a juncture of closed molds used in making the container, a plastic closure having a base wall and a peripheral skirt with complementary threads on the skirt engaging said threaded finish, said base wall having an underside, said closure including an annular flexible flange that extends downwardly from the underside of the base wall of the closure and radially inwardly of the closure, said annular flexible flange having a smooth continuous frustoconical surface facing said threaded finish and a free edge, a portion of the flange adjacent the base wall of the closure overlying the top surface of the threaded finish, said flange normally engaging the inner edge of said threaded finish of said container to provide sealing~
engagement with said inner edge, said flange comprising the sole sealing engagement with said threaded finish of said plastic container and accommodating variations in height and inclination in the top surface of said threaded finish, non-uniformity in a direction radially of the threaded finish such as out-of-roundness or ovality of the threaded finish of the plastic container, and imperfections in the seam produced adjacent the juncture of closed molds used in making the container, the width and position of the flange being such that the free edge thereof normally extends beyond the inner edge of the threaded finish and the sealing engagement is normally intermediate the free edge of said flange and said base wall, said flange being capable of flexing intermediate the free edge and the portion adjacent the base wall such that the free edge may move toward the base wall and such that the flange is capable of flexing differentially about the periphery of the flange such that if the height of the top surface of the threaded finish varies circumferentially, the flange, and flex differently about the periphery of the flange, and such that if the top surface of the threaded finish is inclined downwardly and inwardly on one side, the flange will flex differentially about the periphery of the flange, and such that if the top surface of the threaded finish is inclined downwardly and outwardly, the flange will flex differentially about the periphery of the flange, and such that if the threaded finish is non-uniform in a direction radially of the threaded finish such as being out-of-round or having ovality, the flange will flex differentially to engage the inner edge of the threaded finish at different portions of its width, and such that the flange is free of any contact with the outer edge of the threaded finish wherein a molding seam may interfere with sealing, and such that the closure effectively accommodates any such variations in height and inclination of the top surface of the threaded finish due to trimming and such variations in out-of-roundness or ovality or other non-uniformity in a direction radially of the threaded finish or imperfections in the seam produced adjacent the juncture of closed molds used in making the container.
8. The plastic container package set forth in claim 7 including an annular stop extending axially from the underside of the base wall of the closure, the free edge of the flange underlying the stop but being normally out of engagement with said stop, to limit the flexing of the annular flange.
9. The plastic container package set forth in claim 8 wherein said flange has greater cross-sectional thickness adjacent to the base wall of the closure and has sides converging toward the free edge of the flange.
10. The plastic container package set forth in claim 7 wherein said free edge of said flange is rounded at least along a portion thereof facing said threaded finish.
11. The plastic container package set forth in claim 10 wherein the free edge of said flange is rounded.
12. The container package set forth in claim 7 wherein said container and said closure are made of high density polyethylene.
13. The plastic container package set forth in any one of claims 7-12 wherein said plastic container has been made by closing molds about a tube of molten plastic material, blowing the tube to form the container and thereafter cutting and trimming the threaded finish.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US87448592A | 1992-04-27 | 1992-04-27 | |
| US07/874,485 | 1992-04-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2094489A1 CA2094489A1 (en) | 1993-10-28 |
| CA2094489C true CA2094489C (en) | 2004-08-03 |
Family
ID=25363896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002094489A Expired - Lifetime CA2094489C (en) | 1992-04-27 | 1993-04-20 | Plastic container package with linerless sealing closure system |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US5320236A (en) |
| EP (2) | EP0568288B1 (en) |
| AT (2) | ATE194574T1 (en) |
| CA (1) | CA2094489C (en) |
| DE (2) | DE69333583T2 (en) |
| DK (1) | DK0568288T3 (en) |
| ES (1) | ES2148203T3 (en) |
| GR (1) | GR3034532T3 (en) |
| MX (1) | MX9302462A (en) |
| PT (1) | PT568288E (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5638972A (en) * | 1988-06-17 | 1997-06-17 | Druitt; Rodney Malcolm | Linerless closure for carbonated beverage container |
| NL9402151A (en) * | 1994-12-19 | 1996-08-01 | Johannes Antonius Maria Van Cr | Combination of a bottle and a cap as well as a bottle and cap intended for this combination. |
| US5599495A (en) * | 1995-06-07 | 1997-02-04 | Owens-Brockway Plastic Products Inc. | Method for molding hollow plastic container having a finish with a smaller diameter than the body of the container |
| GB2311283A (en) * | 1996-03-19 | 1997-09-24 | Lawson Mardon | Cap for a container |
| US5738231A (en) * | 1996-04-19 | 1998-04-14 | Rexam Closures, Inc. | Tamper indicating threaded closure-container package |
| AUPO788597A0 (en) * | 1997-07-14 | 1997-08-07 | Closures And Packaging Services Limited | Closure |
| US6382443B1 (en) | 1999-04-28 | 2002-05-07 | Owens-Illinois Closure Inc. | Tamper-indicating closure with lugs on a stop flange for spacing the flange from the finish of a container |
| CA2314592A1 (en) | 1999-09-01 | 2001-03-01 | Owens-Illinois Closure Inc. | Multi-layer plastic closure with barrier properties |
| US20020125205A1 (en) * | 2001-03-07 | 2002-09-12 | John Hathaway | Sealing surface for plastic closure with radial seal |
| US6767601B2 (en) | 2001-10-09 | 2004-07-27 | Honeywell International Inc. | Multilayer laminate for use in chemical barrier packaging |
| CA2540734C (en) * | 2003-10-01 | 2011-12-13 | Obrist Closures Switzerland Gmbh | A closure |
| US7055708B1 (en) * | 2003-10-09 | 2006-06-06 | Owens-Illinois Prescription Products Inc. | Child-resistant package |
| US7434703B2 (en) * | 2004-09-27 | 2008-10-14 | Rexam Prescription Products Inc. | Child-resistant tamper-indicating package |
| US10919672B2 (en) * | 2008-03-31 | 2021-02-16 | Angelcare Feeding Usa, Llc | Seal indication mechanism for containers |
| DE102008030692B3 (en) * | 2008-07-01 | 2009-11-26 | Kunststoffwerk Kremsmünster GmbH | Plastic cap |
| MX2012007949A (en) * | 2010-01-06 | 2012-10-03 | Creative Edge Design Group Ltd | Combined lip and shoulder seal for threaded cap. |
| US10034793B2 (en) * | 2014-06-16 | 2018-07-31 | Sarasota Medical Products, Inc. | Coupling systems including interlocking male and female members |
| JP7323335B2 (en) * | 2019-05-23 | 2023-08-08 | サーモス株式会社 | container with cap |
| WO2020245050A1 (en) * | 2019-06-07 | 2020-12-10 | Creanova Universal Closures Ltd. | Closure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK115754A (en) * | ||||
| FR1187260A (en) | 1956-11-27 | 1959-09-09 | Cerbo Ab | Device for closing the mouth of a container |
| FR1213812A (en) * | 1958-10-29 | 1960-04-04 | Brev De L Ingenieur Savary Soc | Improvements to sealing devices for screw caps |
| US3255907A (en) * | 1964-01-13 | 1966-06-14 | Wheeling Stamping Co | Linerless screw closure for containers |
| US3053406A (en) * | 1960-06-14 | 1962-09-11 | James W Wandell | Screw cap |
| US3067900A (en) * | 1960-07-28 | 1962-12-11 | Kessler Milton | Self-venting pressure-release sealing cap |
| US3203571A (en) * | 1960-12-06 | 1965-08-31 | Robert L Plunkett | Self sealing cap construction |
| US3255909A (en) * | 1964-01-13 | 1966-06-14 | Owens Illinois Inc | Linerless closure |
| US3232470A (en) * | 1964-05-26 | 1966-02-01 | Gibson Ass Inc | Double seal linerless cap for containers |
| US3393818A (en) * | 1967-02-28 | 1968-07-23 | Mack Wayne Plastics Co | Plastic cap having pressure venting features |
| US3802590A (en) * | 1972-05-22 | 1974-04-09 | Bernardin Inc | Linerless container closure |
| US3817418A (en) | 1972-09-20 | 1974-06-18 | Family Prod Inc | Threaded container seal |
| IE43771B1 (en) * | 1975-06-13 | 1981-05-20 | Metal Closures Group Ltd | Improvements in and relating to closures |
| US4069937A (en) * | 1977-01-28 | 1978-01-24 | Owens-Illinois, Inc. | Linerless closure |
| GB1572960A (en) * | 1977-12-05 | 1980-08-06 | Metal Closures Group Ltd | Closure for containers |
| AU516094B2 (en) * | 1977-12-14 | 1981-05-14 | Metal Closures Group Limited | Closures for containers |
| GB2021530A (en) * | 1978-05-25 | 1979-12-05 | Metal Closures Group Ltd | Snap-Fit Closure |
| US4354610A (en) * | 1980-08-29 | 1982-10-19 | Kessler Products Co., Inc. | Reusable container closure cap |
| US4398645A (en) * | 1981-06-29 | 1983-08-16 | Thurston Toeppen | Closure for pressurized containers |
| US4530437A (en) * | 1982-05-03 | 1985-07-23 | Owens-Illinois, Inc. | Tamperproof package |
| US4450973A (en) * | 1982-09-28 | 1984-05-29 | Thurston Toeppen | Closure for pressurized containers |
| EP0109631A3 (en) * | 1982-11-17 | 1985-07-31 | Walter Wiedmer | Thread closure of elastic material for a container |
| US4442947A (en) * | 1983-01-18 | 1984-04-17 | Continental White Cap, Inc. | Plastic closure with sealing flaps |
| GB8328954D0 (en) * | 1983-10-29 | 1983-11-30 | Metal Box Plc | One-piece plastics closure |
| US4566603A (en) | 1984-07-12 | 1986-01-28 | Phoenix Closures, Inc. | Linerless closure |
| US4560077A (en) * | 1984-09-25 | 1985-12-24 | Sun Coast Plastics, Inc. | Plastic closure cap |
| US4872304A (en) * | 1985-12-12 | 1989-10-10 | Tri-Tech Systems International Inc. | Closure cap with a seal and method of and apparatus for forming such closure and seal |
| US4739893A (en) * | 1986-09-04 | 1988-04-26 | Zapata Industries, Inc. | Linerless plastic closure with integral sealing ring |
| JPH0633098B2 (en) * | 1987-04-21 | 1994-05-02 | 東洋製罐株式会社 | Plastic cap |
| JPH01139348A (en) * | 1987-11-11 | 1989-05-31 | Dainippon Ink & Chem Inc | Combination of synthetic resin container and cap |
| US5090788A (en) | 1989-07-27 | 1992-02-25 | Owens-Illinois Closure Inc. | Tamper indicating package |
| EP0460813A3 (en) * | 1990-05-25 | 1992-03-11 | Tredegar Molded Products Company | Threaded closure with integral sealing means |
-
1993
- 1993-02-17 US US08/019,982 patent/US5320236A/en not_active Expired - Lifetime
- 1993-04-20 CA CA002094489A patent/CA2094489C/en not_active Expired - Lifetime
- 1993-04-23 AT AT93303203T patent/ATE194574T1/en active
- 1993-04-23 EP EP93303203A patent/EP0568288B1/en not_active Expired - Lifetime
- 1993-04-23 EP EP99203313A patent/EP1043242B1/en not_active Expired - Lifetime
- 1993-04-23 ES ES93303203T patent/ES2148203T3/en not_active Expired - Lifetime
- 1993-04-23 DE DE69333583T patent/DE69333583T2/en not_active Expired - Fee Related
- 1993-04-23 PT PT93303203T patent/PT568288E/en unknown
- 1993-04-23 AT AT99203313T patent/ATE272548T1/en not_active IP Right Cessation
- 1993-04-23 DK DK93303203T patent/DK0568288T3/en active
- 1993-04-23 DE DE69328991T patent/DE69328991T2/en not_active Expired - Fee Related
- 1993-04-27 MX MX9302462A patent/MX9302462A/en unknown
-
2000
- 2000-09-29 GR GR20000402222T patent/GR3034532T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE69333583T2 (en) | 2005-07-28 |
| DK0568288T3 (en) | 2000-10-30 |
| EP0568288B1 (en) | 2000-07-12 |
| ES2148203T3 (en) | 2000-10-16 |
| EP0568288A1 (en) | 1993-11-03 |
| DE69328991T2 (en) | 2000-11-16 |
| DE69328991D1 (en) | 2000-08-17 |
| US5320236A (en) | 1994-06-14 |
| EP1043242A1 (en) | 2000-10-11 |
| GR3034532T3 (en) | 2000-12-29 |
| ATE194574T1 (en) | 2000-07-15 |
| PT568288E (en) | 2000-12-29 |
| CA2094489A1 (en) | 1993-10-28 |
| EP1043242B1 (en) | 2004-08-04 |
| DE69333583D1 (en) | 2004-09-09 |
| MX9302462A (en) | 1994-06-30 |
| ATE272548T1 (en) | 2004-08-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |