Patent · US Expired

Copying systems, a process for their production, and suitable printing inks for both offset and book printing

US4404251A · kind A · utility

10Cited by

7References

16Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Gert Jabs
Manfred Dahm · Leverkusen, DE
Artur Haus · Leverkusen, DE
Ulrich Nehen · Leverkusen, DE
Klaus Rath · Copenhagen, DK
Norbert Weimann · Leverkusen, DE

Key dates

Filing date	Feb 24, 1982
Grant date	Sep 13, 1983
Priority date	—
Expiry date	Feb 24, 2002

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/249997
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The invention relates to a pressure-sensitive, carbonless copying system and to a process for the production of pressure-sensitive, carbonless copying system wherein a non-aqueous, substantially solvent free printing ink containing micro-capsules which contain dye-precursors, is applied by wet and dry offset and book printing techniques to all or part of at least one surface of a paper substrate; and to printing inks comprising PA0 (1) binders, (2) microcapsules containing dye precursors, (3) spacers having a grain size of from 1.5 to 10 times the diameter of the microcapsules, and optionally auxiliaries and additives.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.