Laser perforation of paper
US5556826A · kind A · utility
12Cited by
14References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 1995 |
| Grant date | Sep 17, 1996 |
| Priority date | — |
| Expiry date | May 18, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24322
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Laser perforation of all types of paper provides paper having sufficient strength characteristics to survive stresses imposed during handling, such as experienced in sheet feed processes. The paper so perforated is readily separable along the perforation line when separation is desired. Carbonless paper products particularly benefit from use of a laser in perforation. The paper, capsule, and capsule fill material are vaporized during the laser process, thus forming clean holes and leaving little residual material on the paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.