Thermoplastic draw tape bag with tacky closure surface
US4842421A · kind A · utility
37Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 1988 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | May 19, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D33/28
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A thermoplastic draw tape bag having a tacky surface on the inside lip of the mouth of the bag and extending around the inner periphery of the lip on the open mouth of the bag, the surface comprising a material having the characteristic of sticking to itself and being adapted to seal the open mouth and hold the bag closed after the draw tape is pulled tight. In one form of the invention, the tacky surface comprises a coating of glycerol mono-oleate. The surface may also comprise a layer of polyvinylidene chloride or a layer of polyisobutylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.