US3375969A - Side weld bag - Google Patents

Description

April 2, 1968 F. A. DAVIS, JR 3,375,969

5 IDE WELD BAG Filed April 4, 1967 /A/VA/7'0,

RANCIS A. DAVIS JR United States. Patent Ofitice 3,3 75,969 Patented Apr. 2, 1968 assignor to Para- Chalfont, Pa., a corporation ABSTRACT OF THE DISCLOSURE A side weld bag made from a flexible polymeric material is provided having a constriction adjacent the open end of the bag which is constructed in airmanner so as to facilitate dispensing from a wicket assembly.

This invention relates to a side weld bag having a constriction adjacent the open end of the bag. The open end of the bag is constructed so that it may be dispensed from a wicket assembly to facilitate loading of the bag.

The constriction adjacent the open end of the bag facilitates a closer pack of the contents of the bag. That is, the contents of the bag will have less clearance room for movement relative to the bag when the bag is closed. This will apply regardless of whether the bag is closed by heat sealing across the constriction or by tying the open end of the bag at the constriction. When the open end of the bag is tied at the constriction, the constriction will reduce the amount of material to be tied and thereby facilitate tying with a smaller tail.

It is an object of the present invention to provide a novel side weld bag.

It is another object of the present invention to provide a novel side weld bag capable of being loaded from a wicket assembly while having a construction adjacent the open end of the bag with the closed end of the bag having a flat bottom, closed gusset, or open gusset.

It is another object of the present invention to provide a novel side weld bag constructed in a manner so as to facilitate a tighter pack of the contents of the bag.

Other objects will appear hereinafter.

For the purpose of illustrating the invention, there is shown in the drawings a form which is presently preferred; it being understood, however, that this invention is not limited to the precise arrangements and instrumentalities shown.

FIGURE 1 is a perspective view of a side weld bag in accordance with the present invention.

FIGURE 2 is a sectional view taken along the line 2-2 in FIGURE 1.

FIGURE 3 is a partial plan view of another bag in accordance with the present invention having a modified bottom in the form of an open gusset.

FIGURE 4 is a sectional view taken along line 4-4 in FIGURE 3.

FIGURE 5 is a perspective view of a bag in accordance with the present invention filled with material, with the open end of the bag being tied.

Referring to the drawing in detail, wherein like numerals indicate like elements, there is shown in FIGURE 1 a bag in accordance with the present invention designated generally as 10. The side weld bag illustrated in FIGURES l and 2 is of a closed bottom gusset type. Bag 10 includes a front layer 12 integral with the rear layer 14. The rear layer 14 is longer than the front layer 12 and extends therebeyond so as to define a flap 16.

The flap 16 is provided with incisions 18 and 20. The provision of incisions eliminates the maintenance problem of small disks which are punched out. The incisions 18 and 20 facilitate loading the bag 10 on the posts of the wicket assembly. The upper edge of the front layer 12 is designated by the numeral 17.

The layers 12 and 14 are integral with one another and interconnected at the closed end of the bag by a closed bottom gusset 22. A side weld 24 extends along the length of the bag 10 from the lower end thereof up to edge 17. A similar weld 26 extends along the opposite edge of the bag 10.

Adjacent the edge 17, the layers 12 and 14 are provided with a constriction defined by the notches 28 and 30. The welds extend along the notches. The bag 10 is preferably made from a flexible polymeric plastic material such as polyethylene.

When the bag 10 is filled with a product, such as bread, the bag assumes the configuration shown in FIGURE 5. A tail 32 is formed by tying the bag at the constriction. The amount of bag material to be tied when forming the tail 32 will be substantially reduced by the constriction. The bag 10 will more closely simulate the contour of the product'disposed therewithin so as to facilitate easier packing and storing of the bagged goods. Biy so locating the constriction adjacent the open end of the bag, the tied bag will facilitate a closer pack of the goods Within the bag since the wire or string which ties the bag will be less likely to shift.

The size of the notches 28 and 30 forming the constriction on the bag 10 will depend upon the size of the bag and the desired contents to be placed in the bag. When the contents are granular in nature, a larger notch may be provided as compared with the size of a notch found preferable when the product is sliced bread. Thus, the bouncing effect of puffed wheat or other granular material can be reduced by using a construction wherein the notch extends inwardly for a distance of three-quarters of an inch on a bag having a width of approximately 8 /2 inches. On a similar size bag intended to receive sliced bread, the notches preferably extend inwardly from the side edges of the bag for a distance of approximately onequarter to three-eighths of an inch. When the notches extend inwardly for a distance of three-eighths of an inch, 1 /2 inches will be reduced from the girth of the bag to facilitate tying the same.

If desired, the bag need not be tied but rather may be heat-sealed so as to close the open end of the bag after the product has been inserted therein. Thus, the bag 10 may be heat-sealed along the dotted lines in FIGURE 1 across the constriction after the product has been positioned in the bag. By effecting the heat sealing operation across the constriction, this likewise will facilitate a denser pack of the contents and/or facilitate the reduction of shiftability of the product within the bag after it has been sealed.

The bag 10 may be provided with an open gusset bottom as shown in FIGURES 3 and 4 instead of the closed gusset bottom as shown in FIGURES l and 3. Thus, in FIGURES 3 and 4 there is illustrated another bag of the present invention designated generally as 10'. The bags 10 and 10 are identical except as will be made clear hereinafter. Hence, bag 10 is identified by corresponding primed numerals.

In bag 10, the bottom corners have been eliminated so as to define side edges 34 and 36 which converge toward the bottom edge 38. The edges 34 and 3 6 are heatsealed to oneanother. Likewise, the corresponding edges on the bottom half of the open gusset such as edges 36 are heat-sealed together. Otherwise, the bag 10' is identical with that described above.

In connection with bag 10', edge 34 on the upper gusset and the corresponding edgeon the lower gusset may be parallel to that portion of notch 30 below the phantom line in FIGURE 1. Likewise, edges 36 and 36' may be parallel to that portion of notch 28 below the phantom line of FIGURE 1. Hence, the bag 10 would be an eightsided bag.

In addition to providing for a tighter pack and/or smaller tail, the bag of the present invention results in a product easier to stack and lends itself to shrink fitting the bag on a product.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof and, accordingly, reference should be made to the appended claims, rather than to the foregoing specification as indicating the scope of the invention.

It is claimed:

1. A bag made from a heat-scalable flexible polymeric plastic material having front and rear layers connected together at one end which is the closed end, a flap on said rear layer projecting beyond the other end of said front fiap at the open end, said rear flap being scored to facilitate mounting the flap on the posts of a wicket assembly, each of said layers being narrower adjacent said open end so as to define a constriction, each of said layers being the same width at the open end and center of said bag, said constriction being defined by notches on opposite sides of said bag, said notches commencing adjacent to the edge of front layers at the open end of the 4 bag, and the side edges of said layers being joined together by parallel Welds with the welds extending along the constriction.

2. A bag in accordance with claim 1 wherein said closed end of the bag is defined by a closed bottom gusset.

3. A bag in accordance with claim 1 wherein the closed end of the bag is defined by an open buttom gusset.

4. A bag in accordance with claim 1 wherein the amount of the constriction is between 5 and 12 percent of the width of the bag.

References Cited UNITED STATES PATENTS 2,138,1119 11/1938 Potdevin et al. 229-53 2,283,069 5/ 1942 Knuetter 229-53 2,821,337 1/1958 Morgan, Jr 229-57 3,312,339 4/1967 Million 229-53 FOREIGN PATENTS 1,3 69,158 4/ 1964 France.

DAVID M. BOCKENEK, Primary Examiner.

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