Package making – Methods – Forming a cover adjunct or application of a cover adjunct to...
Patent
1994-04-20
1995-05-02
Larson, Lowell A.
Package making
Methods
Forming a cover adjunct or application of a cover adjunct to...
493222, 156270, 156277, 156267, 53455, B65B 6100, B65B 4304
Patent
active
054108578
ABSTRACT:
A process for making windowed form, fill and seal bags (70) for containing perishable and/or nonperishable goods involves linearly conveying an endless strip of paper-like material (12) through an adhesive application station (14) which applies adhesive to an adhesive side (18) of the endless strip of paper-like material throughout, with the exception of a window area (34) on each individual bag form (36a, b, c, etc.) making up the endless strip. The endless strip is then conveyed through a synchronized window-blanking station (44) which cuts a window blank (54) from each window area so as to form a window opening (50) therein. The adhesive side is then adhered to a transparent plastic heat-sealable film (58). Side edge margins (32) are slit from the endless strip of paper material to leave a composite endless form (10) for, in turn, making the flexible windowed, form, fill and seal bags (70) for containing perishable and/or nonperishable goods. To make these bags, the individual bag forms (36a, b, c, etc.) are cut from the composite endless form material and folded so that the heat-sealable film (58) is in contact with itself at overlapping edges of the bag form and these edges are then heat-sealed together.
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Butler Rodney A.
Larson Lowell A.
Vitex Packaging, Inc.
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