CA1159293A - Two-ply screen for the sheet forming zone of a papermaking machine - Google Patents
Two-ply screen for the sheet forming zone of a papermaking machineInfo
- Publication number
- CA1159293A CA1159293A CA000386400A CA386400A CA1159293A CA 1159293 A CA1159293 A CA 1159293A CA 000386400 A CA000386400 A CA 000386400A CA 386400 A CA386400 A CA 386400A CA 1159293 A CA1159293 A CA 1159293A
- Authority
- CA
- Canada
- Prior art keywords
- warp
- screen
- wires
- weft
- filaments
- 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
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/0027—Screen-cloths
- D21F1/0036—Multi-layer screen-cloths
-
- 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
- Y10S162/00—Paper making and fiber liberation
- Y10S162/90—Papermaking press felts
Abstract
ABSTRACT OF THE DISCLOSURE
A two-ply screen having a top and a bottom layer and useful for the sheet forming zone of a papermaking machine. There are weft filaments arranged in pairs, one over the other and warp filaments. All the warp filaments are woven into the top layer of the screen but only part of the warp filaments are woven also into the bottom layer of the screen. The screen has good resistance to abrasion and thus a long life. It leaves only slight marks on the paper sheet and has good stability.
A two-ply screen having a top and a bottom layer and useful for the sheet forming zone of a papermaking machine. There are weft filaments arranged in pairs, one over the other and warp filaments. All the warp filaments are woven into the top layer of the screen but only part of the warp filaments are woven also into the bottom layer of the screen. The screen has good resistance to abrasion and thus a long life. It leaves only slight marks on the paper sheet and has good stability.
Description
The invention relates to a two-ply screen for the sheet forming zone of a papermaking machine consisting of weft filaments arranged in pairs one over the other and of warp filaments, all the warp filaments being woven into the top layer of the screen.
Such screens have been known from German OSs
Such screens have been known from German OSs
2,263,476 and 2,540,490. In these screens all the warp wires on the backing side pass below the weft wires so that they are exposed to abrasion. Since two-ply screens break immediately when the warp wires are worn through, as the warp wires transmit all the driving force exerted on the screen, wear of the warp wires is the normal cause of screen failure. This primarily applies to the screens described in German OS 2,263~476 in which the warp wires are worn through long before the weft wires are consumed on the backing.
German OS 2,540,490 partially solves this problem by having the warp wires on the backing pass under only one weft wire.
Consequently, the warp bends on the backing are substan-tially shorter, the we~t bends are longer, and therefore the crimp of the weft wires can be enlarged so that the warp wires on the backing may be considered embedded in the weft wires. By this means one can ensure that the weft wires are worn through before the warp wires. ~owever, a disadvantage is that the weft wires may be only a few hundredths of a 9Z~
millimeter thlcker than the warp wires because otherwise the warp wires are urged downwardly and outwardly by the thicker and stiffer weft wires and thus more exposed to wear.
Therefore, in such a screen it is not possible to use thicker weft wires to provide more volume for abrasion.
Numerous attempts have been made to prolong the service life of multi-ply papermachine screens. German OS
2,~55,185 teaches a papermachine screen of two separate fabric webs interconnected by a special binder warp. The binder warp, however, extends partially on the backing beneath the weft wires so that it is exposed to wear. The thinner the binder warp the sooner will it be worn through.
Such a screenf composed of two separate fabric webs, is very expensive and complicated.
Finally, it has been known from European patent application 0,010,311 to reduce greatl~ the number of weft wires on the backing of a two-ply papermachine screen to make the screen more permeable. In order to prolong the service li~e a number of warp wires are woven only into the lower layer of the screen to increase the volume available for abrasion. These warp wires in the bottom layer deter-mine the spacing also of the warp wires in the top layer.
The small number of warp wires on the papermakiny side results in substantial screen marks in the paper. It is a special disadvantage of this screen that there is a small number of weft wires and a large number of warp wires on the backing side. soth features have the consequence that three or four warp wires wrap around each weft wire so that the latter have no free length to bend outwardly toward the backing side. This screen is thus a typical warp runner and breaks after a relatively short time; as soon as the exposed bends of the warp wires are worn through. Although Figure 5A of the European application shows a screen in which a number of warp wires do not bend downwardly, i.e. they are not woven into the bottom layer, the wire ratio on the backing is nevertheless unfavourable because more warp wires are woven into the few weft wires on the backing side than on the papermaking side.
Starting from German OS 2,540,490 the present invention seeks to provide a two-ply screen for the sheet forming zone oE a papermaking machine which has a prolonged service life while leaving only slight screen marks in the paper and possessing high stability in machine and trans-verse direction.
Accordin~ly the invention is a two-ply fabric for the sheet-forming zone of a papermaking machine comprising a plurality of weft filaments arranged in pairs one over the other and a plurality of warp filaments, a first part of the warp filament being woven into the top ply as well as into the bottom ply of said fabric while a second portion of the warp filaments is woven only into the top ply of said fa-
German OS 2,540,490 partially solves this problem by having the warp wires on the backing pass under only one weft wire.
Consequently, the warp bends on the backing are substan-tially shorter, the we~t bends are longer, and therefore the crimp of the weft wires can be enlarged so that the warp wires on the backing may be considered embedded in the weft wires. By this means one can ensure that the weft wires are worn through before the warp wires. ~owever, a disadvantage is that the weft wires may be only a few hundredths of a 9Z~
millimeter thlcker than the warp wires because otherwise the warp wires are urged downwardly and outwardly by the thicker and stiffer weft wires and thus more exposed to wear.
Therefore, in such a screen it is not possible to use thicker weft wires to provide more volume for abrasion.
Numerous attempts have been made to prolong the service life of multi-ply papermachine screens. German OS
2,~55,185 teaches a papermachine screen of two separate fabric webs interconnected by a special binder warp. The binder warp, however, extends partially on the backing beneath the weft wires so that it is exposed to wear. The thinner the binder warp the sooner will it be worn through.
Such a screenf composed of two separate fabric webs, is very expensive and complicated.
Finally, it has been known from European patent application 0,010,311 to reduce greatl~ the number of weft wires on the backing of a two-ply papermachine screen to make the screen more permeable. In order to prolong the service li~e a number of warp wires are woven only into the lower layer of the screen to increase the volume available for abrasion. These warp wires in the bottom layer deter-mine the spacing also of the warp wires in the top layer.
The small number of warp wires on the papermakiny side results in substantial screen marks in the paper. It is a special disadvantage of this screen that there is a small number of weft wires and a large number of warp wires on the backing side. soth features have the consequence that three or four warp wires wrap around each weft wire so that the latter have no free length to bend outwardly toward the backing side. This screen is thus a typical warp runner and breaks after a relatively short time; as soon as the exposed bends of the warp wires are worn through. Although Figure 5A of the European application shows a screen in which a number of warp wires do not bend downwardly, i.e. they are not woven into the bottom layer, the wire ratio on the backing is nevertheless unfavourable because more warp wires are woven into the few weft wires on the backing side than on the papermaking side.
Starting from German OS 2,540,490 the present invention seeks to provide a two-ply screen for the sheet forming zone oE a papermaking machine which has a prolonged service life while leaving only slight screen marks in the paper and possessing high stability in machine and trans-verse direction.
Accordin~ly the invention is a two-ply fabric for the sheet-forming zone of a papermaking machine comprising a plurality of weft filaments arranged in pairs one over the other and a plurality of warp filaments, a first part of the warp filament being woven into the top ply as well as into the bottom ply of said fabric while a second portion of the warp filaments is woven only into the top ply of said fa-
-3-bric, the number of warp filaments in the top ply being at least twi~e that contained in the bottom ply.
In one embodiment of the invention warp the lower weft filaments are at least 20% and preferably at least 30~
thicker than the warp filaments whereby the service life is additionally prolonged by the larger abrasion volume of the lower weft filaments.
The screen of the in~ention can be most simply produced when the number of warp wires on the papermaking side is twice as high as on the backing since then every second warp wire is not woven into the bottom layer.
However, it is also possible to weave only every third, fourth, etc. warp wire into the bottom layer so that the ratio of warp wires in the top and bottom layers is 3 : 1, 4 : 1 etc. The number of warp wires in the top layer on which the paper sheet i5 formed is preferably at least twice as high as in the bottom layer. The small number of warp wires in the bottom layer results in a so-called weft runner screen and very long weft ~loats, i.e. long free sections of the weft wires, so that the wear is distributed over a large volume of wires.
Compared with a two-ply or multi-ply screen composed of a plurality of separate fabric webs, as known from German OS 2,455,185 the screen of the invention offers all the advantages of a two-ply screen. In particular, the fact that the screen is not assembled from separate fabric ~ -4-2~
webs substantially reduces the tendency of clogging by soil and significantly simplifies the entire course of production of the screens. Weaving requires a lesser number of warping drums and after completion of a screen according to the invention the equipment can be adapted to any desired conventional weaves without any change in the harness system. Also seaming of flat-woven screens is accomplished with conventional equipment and is far simpler than with screens composed of a plurality of separate fabric layers in which each individual layer must be separately seamed~
The length of the weft floats on the backing can be shortened, if required without variation of the screen structure on the paper forming side by passing the warp wires woven into the bottom layer around the lower weft not only once per repeat but twice or more times or passing them under two wefts of the bottom layer.
Thus, for example, the free weft floats can be reduced from 9 to 7 warp wires without sacrificing or impairing the advantages of this novel type of weave, because at least half of the warp wires remain buried in the screen interior and intact till the end of the service life because it is not subject to wear.
The warp wires and the weft wires are generally made up of synthetic monofilament; polyester and polyamide monofilaments are especially suitable. Moreover, the ~ 3 screens are generally woven in flat form in view of the difficulty of round-weaving two-ply screens.
It is a further advantage of the screen of the invention that due to the higher number of warp wires in the top layer the paper forming screen face has a finer struc-ture, leaving weaker mar~ings in the paper.
The warp wires woven only into the top layer of the screen will hereafter be designated as "force trans-mitting warp" as they take up the major portion of the longitudinal tension exerted on the screerl. As the force transmitting warp extends largely straight through the screen, the screen of the invention has a minor construc-tional elongation. The warp wires woven into both layers are hereafter referred to as "construction warp". The force transmitting warp may be thinner than the construction warp, or it may be made of less elongatable rnaterial than the construction warp. In particular, for the construction warp, a more elastic material may be employed than is normalIy used for warp wires in a papermachine screen.
E~amples of the invention will be explained with reference to the drawings, in which:
Figure 1 shows a longitudinal section through the papermachine screen with a construction warp illustrated in front of a force transmitting warp;
Figure 2 illustrates the course of the force transmitting warp in detail;
Figure 3 is a section transversely through the screen;
Figure 4 shows the weave of the paper forming side of a 10~harness woven fabric;
Figure 5 shows the weave of the back side of the fabric of Figure 4;
Figure 6 is a modified weave of the papermachine screen in which the construction warp passes underneath two weft wires of the bottom layer;
Figure 7 shows the course of the force trans-mitting warp in the papermachine screen of Figure 6;
Figure 8 is a transverse section through the modified embodiment of the screen weave;
Figure 9 is a view of the paper forming side in a modified weave; and Figure 10 is a view of the backing of the fabric of Figure 9.
The screen illustrated in Figures 1 to 3 is woven flat, i.e. the warp filaments extend in the machine direction and the weft filaments extend transversely to the machine direction. The screen contains two layers of weft wires, the upper weft wires 3 forming the paper forming side of the screen, and the lower weft wires 4 forming the backing of the screen. One upper weft wire 3 each is arranged above a ~L~13 lower weft wire 4, i.e. the weft wires are provided in pairs. The screen contains at least two types of warp wires, namely a so-called construction warp 1 woven into the top layer 5 and into the lower layer 6, and a so-called force transmitting warp 2 woven only into the upper layer 5.
The screen of the invention can be made in any type of weave, i.e~ satin weave, twill or a modification thereof. Preferably, the screen has satin weave, i.e. the binding points do not touch and are uniformly-distributed.
On the paper forming side of the screen the number of warp wires is substantially greater than on the backing side since a number of the warp wires, namely the force trans-mitting warp 2, are not woven into the bottom layer. The force transmitting warp 2 is therefore not worn down in operation and is not subject to abrasion. None of the warp wires is woven only into the bottom layer 6. All the warp wires, i.e O both the construction warp 1 and the force transmitting warp 2, are woven into the top layer 5. This force transmitting warp 2 can take up the SGreen tension even when the warp and weft wires on the backing side (bottom layer 6) of the screen are completely worn down.
This demonstrates the decisive advantage of this form of screen: The screen has a wire system protected against abrasion which holds the fabric together long after the wires provided for wear are worn away. The force trans-mitting warp 2 should extend in the interior of the screenas far as possible to give a screen that leaves but slight markings and permits good discharge of the sheet. Moreover, the force transmitting warp 2 should have only few crimps, i.eO it should f~llow a straight-course in order to impart to the screen high longitudinal stability and low construc-tional elongation.
Figures 4 and 5 show the weave on the paper forming side and on the backing side of a screen of the invention. The plan view of Figure 4 shows a 5-harness satin weave and that of Figure 5 a 10-harness satin weave.
In Figure 4 the binding points 7 correspond to the crimps in the construction warp 1 and the force transmitting warp 2, while in Figure 5 the binding points 8 are formed only by the construction warp 1.
Figures 6 to 10 show a modified embodiment of the invention. The construction warp 1 extends on the backing under two weft wires (Figure 6). The force transmitting warp 2 extends predominantly in the interior of the screen engaging merely the weft wires 3 of the top layer 5. Th~
necessary tensile strength of the fabric remains intact af-ter the destruction of the bottom layer of the screen.
The course of the force transmitting warp 2 is the same in both weaves so that Figures 2 and 7 are identical.
The structure of the top layer of both screen embodiments is also identical so that the appearance of -the weave is the same in Figures 4 and 9. Only the bottom screen layer (Figure 10~ shows longer warp crimps 8 and shorter crimps 9 of the weft wires. In the crimps 8 on the backing side the two warp wires l are always disposed in pairs thereby doubling the crimping effect of said warp wires.
In the examples for the embodiment of the inven-tion a lO~harness satin weave fabric-is shown. The control of the length of the weft 10ats in the bottom layer is significant primarily in fabrics with a higher pattern repeat so that on the backing side the length of the weft bend can be adapted to the requirements of each individual -~
case.
EXA~lPLE
In a 14~harness satin weave fabric with a density of 52 polyester monofilament warp wires per centimeter and a wire diameter of 0.20 mm the top fabric layer 5 has an appearance corresponding to a 7-harness repeat length. The number of weft wires in both layers is 24 per centimeter.
The diameter of the weft wires 3 of the top l~yer is Q.18 mm; the weft wires, too, all consist of polyester mono-filaments.
The bottom fabric layer 6 is woven from substan-tially thicker weft wires, namely froln 0.27 mrn diameter ' ' , ' .
3i3 polyester monofilaments. In order to further increase theabrasion resistance it is possible to weave into this layer alternatingly polyester and polyamide monofilaments. Depen-ding on the stress to which the screen is subjected during use the sequence may be 1 : 1, extreme cases it may be 2 :
lo In that case two polyamide wires and one polyester wire are used.
In one embodiment of the invention warp the lower weft filaments are at least 20% and preferably at least 30~
thicker than the warp filaments whereby the service life is additionally prolonged by the larger abrasion volume of the lower weft filaments.
The screen of the in~ention can be most simply produced when the number of warp wires on the papermaking side is twice as high as on the backing since then every second warp wire is not woven into the bottom layer.
However, it is also possible to weave only every third, fourth, etc. warp wire into the bottom layer so that the ratio of warp wires in the top and bottom layers is 3 : 1, 4 : 1 etc. The number of warp wires in the top layer on which the paper sheet i5 formed is preferably at least twice as high as in the bottom layer. The small number of warp wires in the bottom layer results in a so-called weft runner screen and very long weft ~loats, i.e. long free sections of the weft wires, so that the wear is distributed over a large volume of wires.
Compared with a two-ply or multi-ply screen composed of a plurality of separate fabric webs, as known from German OS 2,455,185 the screen of the invention offers all the advantages of a two-ply screen. In particular, the fact that the screen is not assembled from separate fabric ~ -4-2~
webs substantially reduces the tendency of clogging by soil and significantly simplifies the entire course of production of the screens. Weaving requires a lesser number of warping drums and after completion of a screen according to the invention the equipment can be adapted to any desired conventional weaves without any change in the harness system. Also seaming of flat-woven screens is accomplished with conventional equipment and is far simpler than with screens composed of a plurality of separate fabric layers in which each individual layer must be separately seamed~
The length of the weft floats on the backing can be shortened, if required without variation of the screen structure on the paper forming side by passing the warp wires woven into the bottom layer around the lower weft not only once per repeat but twice or more times or passing them under two wefts of the bottom layer.
Thus, for example, the free weft floats can be reduced from 9 to 7 warp wires without sacrificing or impairing the advantages of this novel type of weave, because at least half of the warp wires remain buried in the screen interior and intact till the end of the service life because it is not subject to wear.
The warp wires and the weft wires are generally made up of synthetic monofilament; polyester and polyamide monofilaments are especially suitable. Moreover, the ~ 3 screens are generally woven in flat form in view of the difficulty of round-weaving two-ply screens.
It is a further advantage of the screen of the invention that due to the higher number of warp wires in the top layer the paper forming screen face has a finer struc-ture, leaving weaker mar~ings in the paper.
The warp wires woven only into the top layer of the screen will hereafter be designated as "force trans-mitting warp" as they take up the major portion of the longitudinal tension exerted on the screerl. As the force transmitting warp extends largely straight through the screen, the screen of the invention has a minor construc-tional elongation. The warp wires woven into both layers are hereafter referred to as "construction warp". The force transmitting warp may be thinner than the construction warp, or it may be made of less elongatable rnaterial than the construction warp. In particular, for the construction warp, a more elastic material may be employed than is normalIy used for warp wires in a papermachine screen.
E~amples of the invention will be explained with reference to the drawings, in which:
Figure 1 shows a longitudinal section through the papermachine screen with a construction warp illustrated in front of a force transmitting warp;
Figure 2 illustrates the course of the force transmitting warp in detail;
Figure 3 is a section transversely through the screen;
Figure 4 shows the weave of the paper forming side of a 10~harness woven fabric;
Figure 5 shows the weave of the back side of the fabric of Figure 4;
Figure 6 is a modified weave of the papermachine screen in which the construction warp passes underneath two weft wires of the bottom layer;
Figure 7 shows the course of the force trans-mitting warp in the papermachine screen of Figure 6;
Figure 8 is a transverse section through the modified embodiment of the screen weave;
Figure 9 is a view of the paper forming side in a modified weave; and Figure 10 is a view of the backing of the fabric of Figure 9.
The screen illustrated in Figures 1 to 3 is woven flat, i.e. the warp filaments extend in the machine direction and the weft filaments extend transversely to the machine direction. The screen contains two layers of weft wires, the upper weft wires 3 forming the paper forming side of the screen, and the lower weft wires 4 forming the backing of the screen. One upper weft wire 3 each is arranged above a ~L~13 lower weft wire 4, i.e. the weft wires are provided in pairs. The screen contains at least two types of warp wires, namely a so-called construction warp 1 woven into the top layer 5 and into the lower layer 6, and a so-called force transmitting warp 2 woven only into the upper layer 5.
The screen of the invention can be made in any type of weave, i.e~ satin weave, twill or a modification thereof. Preferably, the screen has satin weave, i.e. the binding points do not touch and are uniformly-distributed.
On the paper forming side of the screen the number of warp wires is substantially greater than on the backing side since a number of the warp wires, namely the force trans-mitting warp 2, are not woven into the bottom layer. The force transmitting warp 2 is therefore not worn down in operation and is not subject to abrasion. None of the warp wires is woven only into the bottom layer 6. All the warp wires, i.e O both the construction warp 1 and the force transmitting warp 2, are woven into the top layer 5. This force transmitting warp 2 can take up the SGreen tension even when the warp and weft wires on the backing side (bottom layer 6) of the screen are completely worn down.
This demonstrates the decisive advantage of this form of screen: The screen has a wire system protected against abrasion which holds the fabric together long after the wires provided for wear are worn away. The force trans-mitting warp 2 should extend in the interior of the screenas far as possible to give a screen that leaves but slight markings and permits good discharge of the sheet. Moreover, the force transmitting warp 2 should have only few crimps, i.eO it should f~llow a straight-course in order to impart to the screen high longitudinal stability and low construc-tional elongation.
Figures 4 and 5 show the weave on the paper forming side and on the backing side of a screen of the invention. The plan view of Figure 4 shows a 5-harness satin weave and that of Figure 5 a 10-harness satin weave.
In Figure 4 the binding points 7 correspond to the crimps in the construction warp 1 and the force transmitting warp 2, while in Figure 5 the binding points 8 are formed only by the construction warp 1.
Figures 6 to 10 show a modified embodiment of the invention. The construction warp 1 extends on the backing under two weft wires (Figure 6). The force transmitting warp 2 extends predominantly in the interior of the screen engaging merely the weft wires 3 of the top layer 5. Th~
necessary tensile strength of the fabric remains intact af-ter the destruction of the bottom layer of the screen.
The course of the force transmitting warp 2 is the same in both weaves so that Figures 2 and 7 are identical.
The structure of the top layer of both screen embodiments is also identical so that the appearance of -the weave is the same in Figures 4 and 9. Only the bottom screen layer (Figure 10~ shows longer warp crimps 8 and shorter crimps 9 of the weft wires. In the crimps 8 on the backing side the two warp wires l are always disposed in pairs thereby doubling the crimping effect of said warp wires.
In the examples for the embodiment of the inven-tion a lO~harness satin weave fabric-is shown. The control of the length of the weft 10ats in the bottom layer is significant primarily in fabrics with a higher pattern repeat so that on the backing side the length of the weft bend can be adapted to the requirements of each individual -~
case.
EXA~lPLE
In a 14~harness satin weave fabric with a density of 52 polyester monofilament warp wires per centimeter and a wire diameter of 0.20 mm the top fabric layer 5 has an appearance corresponding to a 7-harness repeat length. The number of weft wires in both layers is 24 per centimeter.
The diameter of the weft wires 3 of the top l~yer is Q.18 mm; the weft wires, too, all consist of polyester mono-filaments.
The bottom fabric layer 6 is woven from substan-tially thicker weft wires, namely froln 0.27 mrn diameter ' ' , ' .
3i3 polyester monofilaments. In order to further increase theabrasion resistance it is possible to weave into this layer alternatingly polyester and polyamide monofilaments. Depen-ding on the stress to which the screen is subjected during use the sequence may be 1 : 1, extreme cases it may be 2 :
lo In that case two polyamide wires and one polyester wire are used.
Claims (4)
1. A two-ply fabric for the sheet-forming zone of a papermaking machine comprising a plurality of weft filaments arranged in pairs one over the other and a plu-rality of warp filaments, a first part of the warp filament being woven into the top ply as well as into the bottom ply of said fabric while a second portion of the warp filaments is woven only into the top ply of said fabric, the number of warp filaments in the top ply being at least twice that contained in the bottom ply.
2. A fabric according to claim 1, wherein the lower weft filaments are at least 20% thicker than the warp filaments.
3. A fabric according to claim 1, wherein the lower weft filaments are at least 30% thicker than the warp filaments.
4. A fabric according to claim 1, wherein the crimps of the warp filaments on the backing side are always disposed in pairs thereby doubling the crimping effect of said warp filaments.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3036409A DE3036409C2 (en) | 1980-09-26 | 1980-09-26 | Double-layer screen for the screen part of a paper machine |
| DEP3036409.1 | 1980-09-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1159293A true CA1159293A (en) | 1983-12-27 |
Family
ID=6112960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000386400A Expired CA1159293A (en) | 1980-09-26 | 1981-09-22 | Two-ply screen for the sheet forming zone of a papermaking machine |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US4499927A (en) |
| EP (1) | EP0048962B2 (en) |
| JP (1) | JPS5789696A (en) |
| AR (1) | AR226612A1 (en) |
| AT (1) | ATE6877T1 (en) |
| BR (1) | BR8106086A (en) |
| CA (1) | CA1159293A (en) |
| DE (2) | DE3036409C2 (en) |
| ES (1) | ES505626A0 (en) |
| FI (1) | FI77705C (en) |
| MX (1) | MX158729A (en) |
| NO (1) | NO153616C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4771814A (en) * | 1987-04-13 | 1988-09-20 | Niagara Lockport Industries, Inc. | Seam for multilayer papermaking fabric and method of making same |
Families Citing this family (62)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3146385C2 (en) * | 1981-11-23 | 1985-10-31 | Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen | Double-layer fabric as a covering for paper machines |
| US4423755A (en) * | 1982-01-22 | 1984-01-03 | Huyck Corporation | Papermakers' fabric |
| SE441016B (en) * | 1982-04-26 | 1985-09-02 | Nordiskafilt Ab | PREPARATION WIRES FOR PAPER, CELLULOSA OR SIMILAR MACHINES |
| DE3307144A1 (en) * | 1983-03-01 | 1984-09-13 | Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen | PAPER MACHINE COVERING IN A FABRIC BINDING THAT DOES NOT HAVE A SYMMETRY AXIS LONGITUDE |
| US4564051A (en) * | 1983-07-16 | 1986-01-14 | Andreas Kufferath Gmbh & Co. Kg | Multiple ply dewatering screen particularly for a web forming part of a paper making machine |
| EP0131940B1 (en) * | 1983-07-16 | 1987-10-14 | Andreas Kufferath GmbH & Co. KG | Multi-layer screen cloth, in particular for the wet end of a paper-making machine |
| AT382653B (en) * | 1983-09-22 | 1987-03-25 | Hutter & Schrantz Ag | DRAINAGE SCREEN FOR PAPER MACHINES AND THE LIKE |
| US5114777B2 (en) | 1985-08-05 | 1997-11-18 | Wangner Systems Corp | Woven multilayer papermaking fabric having increased stability and permeability and method |
| US4789009A (en) * | 1986-01-08 | 1988-12-06 | Huyck Corporation | Sixteen harness dual layer weave |
| US4995429A (en) * | 1986-02-05 | 1991-02-26 | Albany International Corp. | Paper machine fabric |
| DE3615304A1 (en) * | 1986-05-06 | 1987-11-12 | Wangner Gmbh Co Kg Hermann | COVER FOR THE SHEET FORMING PART OF A PAPER MACHINE |
| US4709732A (en) * | 1986-05-13 | 1987-12-01 | Huyck Corporation | Fourteen harness dual layer weave |
| DE3634134A1 (en) * | 1986-10-07 | 1988-04-21 | Wangner Gmbh Co Kg Hermann | COVER FOR THE SHEET FORMING PART OF A PAPER MACHINE |
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| US20090183795A1 (en) | 2008-01-23 | 2009-07-23 | Kevin John Ward | Multi-Layer Papermaker's Forming Fabric With Long Machine Side MD Floats |
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| JP5280160B2 (en) * | 2008-11-12 | 2013-09-04 | 日本フイルコン株式会社 | Industrial multilayer fabric with drawn wefts |
| US8196613B2 (en) * | 2009-02-25 | 2012-06-12 | Kevin John Ward | Multi-layer papermaker's forming fabric with paired MD binding yarns |
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| FI20115222L (en) * | 2011-03-04 | 2012-09-05 | Metso Fabrics Oy | Paper machine fabric |
| US10953354B2 (en) | 2013-08-29 | 2021-03-23 | Clear Edge-Germany Gmbh | Filter element |
| GB201315363D0 (en) * | 2013-08-29 | 2013-10-09 | Clear Edge Germany Gmbh | Filter element |
| GB201315362D0 (en) * | 2013-08-29 | 2013-10-09 | Clear Edge Germany Gmbh | Filter Element |
| US10953355B2 (en) | 2013-08-29 | 2021-03-23 | Clear Edge-Germany Gmbh | Filter element |
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|---|---|---|---|---|
| CA711428A (en) * | 1965-06-15 | Dominion Ayers Limited | Water-permeable felt | |
| US2934097A (en) * | 1956-12-06 | 1960-04-26 | Hindle Thomas | Papermakers' dryer felts |
| US4071050A (en) * | 1972-09-01 | 1978-01-31 | Nordiska Maskinfilt Aktiebolaget | Double-layer forming fabric |
| SE366353B (en) * | 1972-09-01 | 1974-04-22 | Nordiska Maskinfilt Ab | |
| US3885603A (en) * | 1973-11-21 | 1975-05-27 | Creech Evans S | Papermaking fabric |
| DE2455185A1 (en) * | 1973-11-21 | 1975-05-22 | Slaughter Philip H | FABRIC FOR THE MAKING OF PAPER |
| SE385486B (en) * | 1974-10-10 | 1976-07-05 | Nordiska Maskinfilt Ab | PROPAGATION WIRE FOR PAPER, CELLULOSE OR SIMILAR MACHINES AND MANUFACTURED THE SAME |
| US4289173A (en) * | 1975-10-30 | 1981-09-15 | Scapa-Porritt Limited | Papermakers fabrics |
| SE397371C (en) * | 1976-02-24 | 1980-08-07 | Nordiska Maskinfilt Ab | PREPARATION VIRUS FOR PAPER, CELLULOSA OR SIMILAR MACHINES |
| US4071009A (en) * | 1976-06-28 | 1978-01-31 | Caterpillar Tractor Co. | Combined noise suppressing and air flow guide enclosure for engines |
| GB1572905A (en) * | 1976-08-10 | 1980-08-06 | Scapa Porritt Ltd | Papermakers fabrics |
| JPS5512863A (en) * | 1978-07-13 | 1980-01-29 | Nippon Filcon Kk | Synthetic resin net for paper making |
| CA1110953A (en) * | 1978-10-23 | 1981-10-20 | John G. Buchanan | Duplex forming fabric |
| US4314589A (en) * | 1978-10-23 | 1982-02-09 | Jwi Ltd. | Duplex forming fabric |
| US4344464A (en) * | 1980-07-11 | 1982-08-17 | Huyck Corporation | Endless forming fabrics with bi-crimp characteristics |
| US4359069A (en) * | 1980-08-28 | 1982-11-16 | Albany International Corp. | Low density multilayer papermaking fabric |
-
1980
- 1980-09-26 DE DE3036409A patent/DE3036409C2/en not_active Expired
-
1981
- 1981-09-18 ES ES505626A patent/ES505626A0/en active Granted
- 1981-09-22 MX MX189256A patent/MX158729A/en unknown
- 1981-09-22 CA CA000386400A patent/CA1159293A/en not_active Expired
- 1981-09-23 BR BR8106086A patent/BR8106086A/en not_active IP Right Cessation
- 1981-09-24 DE DE8181107606T patent/DE3162899D1/en not_active Expired
- 1981-09-24 AT AT81107606T patent/ATE6877T1/en active
- 1981-09-24 EP EP81107606A patent/EP0048962B2/en not_active Expired
- 1981-09-25 FI FI812994A patent/FI77705C/en not_active IP Right Cessation
- 1981-09-25 NO NO813262A patent/NO153616C/en unknown
- 1981-09-25 AR AR286890A patent/AR226612A1/en active
- 1981-09-26 JP JP56154735A patent/JPS5789696A/en active Granted
-
1983
- 1983-12-08 US US06/559,015 patent/US4499927A/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4771814A (en) * | 1987-04-13 | 1988-09-20 | Niagara Lockport Industries, Inc. | Seam for multilayer papermaking fabric and method of making same |
Also Published As
| Publication number | Publication date |
|---|---|
| FI77705C (en) | 1990-07-25 |
| JPS5789696A (en) | 1982-06-04 |
| ATE6877T1 (en) | 1984-04-15 |
| EP0048962B1 (en) | 1984-03-28 |
| US4499927A (en) | 1985-02-19 |
| BR8106086A (en) | 1982-06-08 |
| NO813262L (en) | 1982-03-29 |
| DE3036409C2 (en) | 1983-01-20 |
| FI77705B (en) | 1988-12-30 |
| DE3036409A1 (en) | 1982-05-13 |
| ES8308379A1 (en) | 1983-08-16 |
| FI812994L (en) | 1982-03-27 |
| ES505626A0 (en) | 1983-08-16 |
| NO153616C (en) | 1986-05-21 |
| NO153616B (en) | 1986-01-13 |
| DE3162899D1 (en) | 1984-05-03 |
| EP0048962A2 (en) | 1982-04-07 |
| EP0048962B2 (en) | 1988-03-16 |
| MX158729A (en) | 1989-03-08 |
| AR226612A1 (en) | 1982-07-30 |
| JPH0214475B2 (en) | 1990-04-09 |
| EP0048962A3 (en) | 1982-06-23 |
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