Seal for zippered bag
View Patent ↗The present invention provides a recloseable bag, the bag having a mouth and including a closure at the mouth, the closure having a first end and a second end. The recloseable bag also includes a first crushed section at the first end of the closure, the closure further including an intact portion. It also includes a first transition area between the first crushed section and the intact portion, and a sealing material in the first transition area.
1. A recloseable bag comprising:
a first wall and an opposed second wall sealed along peripheral edges to define a pouch having an open end extending between two side seams;
a first zipper profile attached to the first wall and extending along the open end and having a crushed portion positioned within each of the two side seams, the first zipper profile having a first backing substrate and a first set of protuberances extending from the first substrate, the first set of protuberances extending the length of the first zipper profile;
a second zipper profile attached to the second wall and extending along the open end, the second zipper profile having a second backing substrate and a second set of protuberances extending from the second substrate, the second set of protuberances extending the length of the second zipper profile and being dimensioned to releasably interlock with the first set of protuberances; and
wherein the crushed portion is formed by depositing two drops of a sealing material onto the top of the first zipper profile in horizontal spaced relationship and then the first zipper profile is interlocked with the second zipper profile with pinch rollers and then dies crush the first and second zipper profiles together directly over the location of the sealing material to form the crushed section and then lateral edges of the first wall and the second wall are heat sealed together to form side seams and an end edge of the first and second walls are heat sealed to form a bottom wall of the bag.
2. The bag of claim 1 wherein the sealing material is a plastic material.
3. The bag of claim 1 wherein the sealing material is a glue.
4. The bag of claim 3 wherein the glue is thermally activated.
5. The bag of claim 3 wherein the glue is cured by ultraviolet light.
6. The bag of claim 3 wherein the glue is chemically cured.