Laser perforation of paper
US5444035A · kind A · utility
8Cited by
12References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1994 |
| Grant date | Aug 22, 1995 |
| Priority date | — |
| Expiry date | Jun 23, 2014 |
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.