Carbonless copying system and method of producing multiple colored copy images therewith
US4943554A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 1988 |
| Grant date | Jul 24, 1990 |
| Priority date | — |
| Expiry date | May 24, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/165
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A carbonless copy system which enables the formation of a plurality of different colored images on a substrate. A phenolic resin or reactive clay image-forming component is applied as a CF coating on a recording substrate. One or more coatings of encapsulated dye precursors (complementary image-forming components) are applied to selected portions of the CF coating on the recording substrate and one or more coatings of encapsulated dye precursors are applied to selected portions of a transfer substrate. The dye precursor coatings are capable of forming different colored reaction products when coming into contact and reacting with the phenolic resin or reactive clay. Upon applying pressure to the transfer substrate, the dye precursor capsules are ruptured, releasing the dye precursor which contacts and reacts with the phenolic resin or reactive clay to form the colored reaction products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.