Pressure sensitive record material
US5130289A · kind A · utility
0Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1990 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | Oct 15, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/1555
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Acid sized carbonless base paper incorporating a sulphate based filler, particularly calcium sulphate, is less base reactive than otherwise similar paper made using conventional clay (kaolin) fillers. Carbonless paper, particularly CB paper, made from such base is less susceptible to undesired discoloration arising from base reactivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.