Thermoplastic draw tape bag with tacky tape
US4813794A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 19, 1988 |
| Grant date | Mar 21, 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 coating on the draw tape at the secured end thereof and extending for a fraction of the length of the draw tape. The tacky coating comprises a material having the characteristic of sticking to itself and being adapted to cling to the inside of the hem when the uncoated length of the draw tape is withdrawn from the hem causing the hem to gather and hold the bag closed after the draw tape is pulled tight thereby preventing the bag from inadvertently coming open. The tacky coating on the draw tape may comprise a coating of glycerol mono-oleate or a layer of polyvinylidene chloride or a layer of polyisobutylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.