초록 ▼

A method of making a multicompartment reclosable thermoplastic bag having at least two compartments is disclosed. Each compartment has a top, a bottom, two side edges, and two opposing sidewalls joined at the side edges and the bottom. Each compartment has a closure across the top thereof, which are

A method of making a multicompartment reclosable thermoplastic bag having at least two compartments is disclosed. Each compartment has a top, a bottom, two side edges, and two opposing sidewalls joined at the side edges and the bottom. Each compartment has a closure across the top thereof, which are arranged back-to-back and aligned. The compartments are attached together proximate the tops of the compartments, and the bottoms of the compartments are free from being attached to each other. Processes for making such bags from one or more webs are also disclosed.

대표청구항 ▼

What is claimed is: 1. A method of making a storage bag, the method comprising the steps of: extruding a single web of thermoplastic film, the web being planar in shape and formed of a single layer; adding closure elements to the web subsequent to the forming of the web; cutting the web at a predet

What is claimed is: 1. A method of making a storage bag, the method comprising the steps of: extruding a single web of thermoplastic film, the web being planar in shape and formed of a single layer; adding closure elements to the web subsequent to the forming of the web; cutting the web at a predetermined location on the web to create a first sheet and a second sheet each of the first and second sheet being planar in shape and formed of a single layer; folding the first sheet to form first and second parallel layers meeting at a bottom edge of a first compartment; folding the second sheet to form first and second parallel layers meeting at a bottom edge of a second compartment; closing a closure element of the first compartment, the first compartment having an inner side wall and an outer side wall; closing a closure element of the second compartment, the second compartment having an inner side wall and an outer side wall; joining the first compartment to the second compartment, wherein the first compartment has a mouth at a top edge and the second compartment has a mouth at a top edge, the first and second compartments being joined at a point between the inner side wall of the first compartment and the inner side wall of the second compartment, the inner side walls joined together to create a central lip, the central lip extending above the top edges of the first and second compartments; and simultaneously joining the first and second side edges of the first and second compartments and severing the web into individual bags. 2. The method of claim 1, wherein the first sheet is folded at a predetermined location on the first sheet and the second sheet is folded at a predetermined location on the second sheet. 3. The method of claim 2, wherein the predetermined location on the first sheet is at a midpoint between first and second closure elements of the first sheet and the predetermined location on the second sheet is at a midpoint between first and second closure elements of the second sheet. 4. The method of claim 1, wherein the closure element of the first compartment is substantially aligned with the closure element of the second compartment. 5. The method of claim 1, wherein the first and second compartments are joined proximate the top edges of the first and second compartments. 6. The method of claim 5, wherein the first and second compartments are joined at a point between the closure element of the first compartment and the closure element of the second compartment. 7. The method of claim 1, wherein the first and second compartments are joined by at least one of the group consisting of an adhesive, a heat seal, an ultrasonic seal, an extruded lamination, and combinations thereof. 8. The method of claim 1, wherein the first compartment and the second compartment are joined by a continuous seal. 9. The method of claim 1, wherein the first compartment and the second compartment are joined by an intermittent seal. 10. The method of claim 1, further comprising the step of integrating the at least one closure element with the web. 11. The method of claim 1, further comprising the step of laminating the at least one closure element to the web. 12. The method of claim 1, further comprising the step of embossing the web. 13. The method of claim 1, further comprising the step of providing microperforations in the web. 14. The method of claim 1, wherein the side edges of the first and second compartments are sealed by at least one of the group consisting of hot wire sealing, hot knife sealing, ultrasonic sealing, adhesive sealing and combinations thereof. 15. The method of claim 1, wherein the closing steps involve forcing mating strips into frictional engagement.