Stand-up plastic storage bag with reinforced bottom gusset
US10414566B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2017 |
| Grant date | Sep 17, 2019 |
| Priority date | — |
| Expiry date | Aug 16, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D33/2508
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A stand-up plastic food storage bag having two bottom gusset walls and a folding seam defining abutment of the front bottom gusset wall to the rear bottom gusset wall. There are gusset wall reinforcement layers on an external surface of the bottom gusset walls, and these reinforcement layers terminate at least about 0.25 cm away from the folding seam, and do not cover the folding seam, so they do not significantly interfere with folding the seam when collapsing the bag into its storage condition. A method for forming such stand-up plastic food storage bags by coextruding a monolayer plastic panel film and two monolayer plastic gusset floor reinforcement layers, wherein the monolayer plastic gusset floor reinforcement layers comprise two parallel strips spaced apart by at least about 0.25 cm on the panel film, lengthwise in a direction of coextrusion, followed by folding the monolayer plastic panel film lengthwise to form a lengthwise fold line between the two monolayer plastic gusset floor reinforcement layers, forming a gusset in the area of the lengthwise fold line, forming seals in the plastic panel film in a direction perpendicular to the lengthwise fold line to define individu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.