Single coating record system-solvent loss produces color
US4012554A · kind A · utility
19Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1974 |
| Grant date | Mar 15, 1977 |
| Priority date | — |
| Expiry date | Dec 12, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/165
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A colorless liquid ink is provided which yields a distinctive marking color on exposure to normal environmental conditions of temperature and pressure as when used for writing on a sheet of plain paper. This ink may be encapsulated to give pressure-rupturable microcapsules. Autogenous, pressure-sensitive record materials are provided by incorporation of such microcapsules in or on sheets of paper for use singly or in manifold duplicating systems which respond to printing-pressures applied by un-inked printing members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.