Triple-folded hot air sealed thermoplastic bags
US10604322B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2015 |
| Grant date | Mar 31, 2020 |
| Priority date | — |
| Expiry date | May 4, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D75/12
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method for sealing a thermoplastic bag includes forming a first fold in a top end of the bag; forming a second fold in the top end that includes the first fold; folding the first fold to form a first portion of the first fold and a second portion of the first fold, the second portion of the first fold is folded onto the first portion of the first fold; and heat sealing the first fold and the second fold to each other and to a portion of the bag that faces the first fold, the heat sealing including applying hot air to the bag. Preferably the second fold has a height that is less than a height of the first fold such that the forming of the second fold folds the first fold to form the first and second portions of the first fold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.