Reclosable packaging bag and method for manufacturing same
US6908422B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 7, 2001 |
| Grant date | Jun 21, 2005 |
| Priority date | — |
| Expiry date | Mar 7, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1054
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A reclosable packaging bag comprises a main bag body having an opening portion and at least one heat-sealed portion; and a linear fastener provided on the opening portion of the main bag body. The linear fastener is provided along the opening portion of the main bag body by an insert injection molding so as not to extend to the heat-sealed portions. A method for manufacturing the bag comprises the three steps. First, the first and second linear fastening members are formed on a prescribed position of a sheet of film material by an insert injection molding so as to be spaced from each other. These fastening members are engageable with each other to form a linear fastener. Second, the sheet of film material is folded in two so that the fastening members can engage with each other. Third, each of opposite portions of the sheet of film material thus folded is heat-sealed to form side heat-sealed portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.