Image permanence method
US4869921A · kind A · utility
9Cited by
24References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1988 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | Jun 30, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M7/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of preventing smudging of indicia printed on a surface by selective application of an amount of coating material to lubricate the contact with surfaces abrading the printed indicia or to provide physical separation from abrading surfaces, and thus prevent smearing. The coating material is preferably a Teflon micropowder that is applied by dispensing controlled amounts through a plurality of apertures adjacent the surface of a piece of paper on which indicia has just been printed by a non-impact printer such as a laser printer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.