Movable clamp orienter for draw tape
US4684359A · kind A · utility
28Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 7, 1986 |
| Grant date | Aug 4, 1987 |
| Priority date | — |
| Expiry date | Aug 7, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S493/928
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thermoplastic draw tape having thick and wide end portions with a relatively thin and narrow central portion between them is produced by movable clamps which stretch the tape between stationary clamps to produce the stretched, oriented portions of the tape. A plurality of movable clamps and a plurality of stationary clamps produce a plurality of stretched central portions so that the stretching time can be greater than the cycle time of bag making machinery with which the stretching apparatus is synchronized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.