Continuous process for trash bag with inner bag
US9315319B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2012 |
| Grant date | Apr 19, 2016 |
| Priority date | — |
| Expiry date | Dec 19, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B2170/204
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Trash bags may be formed to include first and second sidewalls joined along a first side edge, an opposite second side edge, and a closed bottom edge to form an outer bag. A second inner bag may be inserted within the first bag to form a “bag-in-a-bag” type configuration in which the inner bag is bonded to the outer bag along side seals by a continuous process. The bags may also be bonded together along the hem and the draw tape. When the side seals of the inner bag and the outer bag are sealed together by a continuous rather than a reciprocating process, the inventors have surprisingly found that such seals require carefully controlled process conditions to prevent inadequate seals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.