Typewriting machines – Including interposed inking device for record-medium – Ribbon – per se
Patent
1990-04-19
1991-01-15
Wiecking, David A.
Typewriting machines
Including interposed inking device for record-medium
Ribbon, per se
4002413, 400240, B41J 3100
Patent
active
049849123
ABSTRACT:
A fabric ribbon having multicolored regions has coloring matter in the regions of only flushed pigments in a liquid vehicle. Flushed pigments do not migrate between colored regions under normal conditions, and therefore mixing of the colors is avoided without alteration of the fabric or use of a fabric with special characteristics or regions.
Flushed pigments have very small article size and perform like dyes with respect to replenishing the ribbon for good ribbon life. Yet, the ribbon colors do not bleed together, a characteriztic of pigments.
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patent: 385391 (1888-07-01), Underwood et al.
patent: 2590200 (1952-03-01), Neidich
patent: 4116924 (1978-09-01), Peabody
patent: 4400216 (1983-08-01), Arora
patent: 4543380 (1985-09-01), Schneider et al.
patent: 4574623 (1986-03-01), Neumann
patent: 4680057 (1987-07-01), Hays
patent: 4724002 (1988-02-01), Shibata et al.
Findlay Hugh T.
Froman Kenneth H.
Martone James F.
Brady John A.
Internal Business Machine Corporation
Keating Joseph R.
Wiecking David A.
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