Apparatus for a tentering chain having tentering clamps with a continuously variable pitch between two neighboring clamping bodies
US5265313A · kind A · utility
9Cited by
5References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 17, 1992 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Jul 17, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C55/165
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In order to achieve a controlled longitudinal shrinkage of a film web, an adjusting mechanism including a threaded spindle with a cross-piece is provided between neighboring clamping bodies along the tentering chain. The cross-piece is equipped with control rollers that are radially arranged around the longitudinal axis of the threaded spindle and spaced from one another by an angular spacing of, for example, 90.degree. between neighboring control rollers. The control rollers intermittently engage a control rail that has operational segments of a multiple leads screw guide track.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.