Bag body provided with zipper tape, bag body, method for producing bag body, and device for producing bag body
US11649090B2 · kind B2 · utility
2Cited by
14References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2020 |
| Grant date | May 16, 2023 |
| Priority date | — |
| Expiry date | Jun 24, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D33/2583
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A male belt-shaped base having a male member with a short width, and a separation strip are heat-sealed to a film. A female belt-shaped base having a female member with a long width is heat-sealed at a predetermined position so that the male portion and the female portion are at engageable positions. The film is layered and suitably sealed to form a zipper-tape bag. The film and the separation strip are cut to form a cut portion at a non-bonded region in which the film of the zipper-tape bag is not bonded, thereby forming an unsealing tab. The unsealing tab can be easily formed by simply cutting the film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.