Roll of thermoplastic bags
US4904092A · kind A · utility
80Cited by
16References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1988 |
| Grant date | Feb 27, 1990 |
| Priority date | — |
| Expiry date | Oct 19, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D33/20
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A continuous roll or stack of thermoplastic bags having improved openability is disclosed. The bags feature an area of permanently tacky, pressure-sensitive adhesive, applied to an outer surface of each bag. When a bag is pulled from the roll or stack, the adhesive temporarily adheres one side of the bag to the roll or stack, causing the front and back of the bag to separate slightly, thereby enhancing openability. Also disclosed are thermoplastic bags onto the surface of which an area of adhesive is applied in such a manner that the bags are self-closing when twisted shut in the area of the adhesive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.