Web-stretching process
US4652409A · kind A · utility
22Cited by
7References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 23, 1984 |
| Grant date | Mar 24, 1987 |
| Priority date | — |
| Expiry date | Nov 23, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C55/165
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for producing a stretched web of plastics material wherein a web of plastics material is passed through an apparatus in which the web, gripped at its edges by web gripping devices mounted on carriages which run on guide rails is stretched by increasing the distance between adjacent gripping devices by altering the degree of extension of an articulated chain to which the carriages are attached.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.