Apparatus and method for making plastic bags
US10493715B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 9, 2016 |
| Grant date | Dec 3, 2019 |
| Priority date | — |
| Expiry date | Jan 28, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B2160/20
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In an apparatus and method for successively making plastic bags, webs of first and second panel materials are superposed and fed longitudinally. A plastic film is slit to form longitudinal slit lines so as to be divided into the web of the first panel material and a plurality of webs of a bottom gusset material before the webs of the first and second panel materials are superposed. Then, the webs of the bottom gusset material are guided and supplied to the webs of the first or second panel material by bottom gusset material guide devices. The bottom gusset material is not supplied from another supply roll, and a pattern discrepancy is not caused.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.