Apparatus for constant pressure in line-web crush-scoring
US4678457A · kind A · utility
17Cited by
4References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 17, 1985 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Sep 17, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/7855
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
There is provided an apparatus for applying constant pressure to a knife blade for crush-scoring, wherein the knife blade is supported in a substantially frictionless manner and the constant pressure is supplied by a flexible diaphragm acting on a plunger which can move substantially without friction in a pneumatic cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.