Method for constant pressure diagonal-web crush-scoring
US4881935A · kind A · utility
43Cited by
10References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 18, 1988 |
| Grant date | Nov 21, 1989 |
| Priority date | — |
| Expiry date | Aug 18, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/4841
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
There is provided an apparatus for applying constant pressure to a plurality of anvil rollers for crush-scoring used in combination with crush-scoring cylinders having protrusions extending from the surface thereof. Each anvil roller 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.