Carbonless copy material
US5510311A · kind A · utility
Inventors
Key dates
| Filing date | Sep 12, 1994 |
| Grant date | Apr 23, 1996 |
| Priority date | — |
| Expiry date | Sep 12, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/165
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A sheet of copy material of the type having on one face (18a;28a) thereof a coating (B) incorporating a colour-forming substance of the kind which when released onto a receptor material (F) produces a visible mark, and having an opposite face (18a;28b) of the material free from such coating, characterised in that said one face (18a;28a) of the material comprises a visible image (I) formed thereon before the deposition of said coating (B), which is translucent, so that said visible image (I) is discernible through said coating (B) and in that said opposite face (18b;28b) carries a further image (II) formed thereon after the deposition of said coating (B) on said one face (18a;28a).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.