Hooded reclosable packages and related methods of manufacture
AssigneeIllinois Tool Works Inc.
InventorsStephen P. Schaller, Eric Paul Plourde
Life of this patent
Estimating the term…
Abstract
A reclosable package comprising a hooded zipper with a pair of off-center lines of perforations that are hermetically sealed by a layer of material. The lines of perforations facilitate tearing off the hood to gain access to the zipper. One method of manufacture involves joining the hooded zipper to respective web portions formed by folding a web and then slitting the folded web in two. Another method of manufacture involves joining the hooded zipper to respective web portions formed by slitting a web in two and then orienting the two web portions into mutually confronting positions. The package may be constructed to have a wicket flap.
Claims13
A method of manufacturing a reclosable bag, comprising the following steps:
- folding a first web of bag making film;
- slitting said first web of bag making film along the fold, thereby severing a first portion of said first web from a second portion of said first web and forming respective edges thereof;
- guiding said respective edges of said first and second web portions to position in alignment with and in opposition to each other;
- providing a hooded zipper having a hood that is a second web folded to form a U- or V-shaped profile having first and second sides;
- placing marginal portions of said first and second sides of the hood of said hooded zipper in position adjacent and overlapping respective marginal portions of said first and second web portion adjacent the edges formed by the slit;
- concurrently joining the overlapped marginal portion of the first side of the hood with the first web portion along a first band-shaped zone and the overlapped marginal portion of the second side of the hood with the second web portion along a second band-shaped zone;
- cross sealing said first web portion to said second web portion and said first side of said hood to said second side of said hood along first and second lines that are parallel to each other and transverse to said hooded zipper, said first and second lines being disposed at first and second locations respectively;
- and
- cutting said first and second web portions and said hooded zipper at said first and second lines, thereby forming an individual bag.
A method of manufacturing a reclosable bag, comprising the following steps:
- folding a web of bag making film so that marginal portions of first and second web portions of said folded web are in alignment with and opposition to each other, said first web portion including said fold and said second web portion not including said fold;
- providing a hooded zipper having a hood that is a second web folded to form a U- or V-shaped profile having first and second sides;
- placing said first and second sides of the hood of said hooded zipper adjacent said marginal portions of said first and second web portions respectively;
- joining said first side of said hood to said marginal portion of said first web portion along a first band-shaped zone and said second side of said hood to said marginal portion of said second web portion along a second band-shaped zone;
- cutting said web of bag making film to sever said first web portion from said second web portion along a line parallel to and offset from said fold;
- cross sealing said first web portion to said second web portion and said first side of said hood to said second side of said hood along first and second lines that are parallel to each other and transverse to said hooded zipper, said first and second lines being disposed at first and second locations respectively;
- and
- cutting said first and second web portions and said hooded zipper at said first and second lines, thereby forming an individual bag.
Dependencies are inferred from the claim text.