Method of scoring fracturable adhesive backing
US3977310A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1972 |
| Grant date | Aug 31, 1976 |
| Priority date | — |
| Expiry date | Nov 27, 1992 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/0341
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A process and apparatus for selectively compressing paper stock of the type which is used as a protective backing sheet for adhesive-coated systems. The process comprises use of a novel compression tool, the precise characteristics of which depend on the paper stock being utilized. The compression tool comprises a blunt, rotatable, circular, working edge which has a radius of at least 0.02, but preferably at least 0.04 inches in diameter and at least one half of the thickness of the paper being weakened. This tool advantageously comprises the compressing edge, being mounted integrally with a bearing surface which makes pressure control easier and limits penetration of the tool. In the preferred embodiments of the invention, the bearing surface is faced with elastomeric material. Disclosure is also made of a novel release sheet and adhesive sheet assembly which is manufactured utilizing the process and apparatus of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.