Method for fabricating a perforated film and its apparatus
US5265506A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 4, 1992 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Sep 4, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/538
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Method and apparatus for fabricating a perforated film comprising the steps of pinching a film material, (3) between a cutter roll (1) with cutting edges (12) and a backing roll (2) to press the cutting edges (12) to the film material (3) and driving, to rotate least one of the cutter roll (1) and the backing roll (2), to form holes such as slits in a film material. The apparatus is decelerated by a stop command signal of an apparatus, detecting the speed of the apparatus attaining a predetermined small speed, generating an advance stop signal when the apparatus is approaching a stop a condition, and displacing the backing roll (2) so that the cutter roll is separated from the backing roll.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.