Tension frame for releasable clamping of a film
US4778375A · kind A · utility
2Cited by
6References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 23, 1987 |
| Grant date | Oct 18, 1988 |
| Priority date | — |
| Expiry date | Jun 23, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/048
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In the production of shaped plastic elements using deep-drawable thermoplastic film, a tension frame is required to clamp the film. The tension frame is formed by lengthwise and transverse frame parts, on the outside edges of which is located one angle clamp on each. The angle clamps can be actuated by means of closure levers into a releasable clamping position, in which the clamp arms of the angle clamp press with force against bottom fixing members of the frame parts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.