Typewriting machines – Including interposed inking device for record-medium – Endless ribbon or cartridge therefor
Patent
1987-02-09
1988-05-31
Sewell, Paul T.
Typewriting machines
Including interposed inking device for record-medium
Endless ribbon or cartridge therefor
4002024, 400208, B41J 3202, B41J 2712
Patent
active
047477113
ABSTRACT:
A re-inking device is fitted to a cartridge for an inked ribbon. The cartridge comprises a magazine housing the ribbon which is of the closed loop type and which is disposed in randomly distributed loops, and a pair of rollers for the unidirectional feed movement of the ribbon. The re-inking device comprises an ink reservoir or inker, an ink metering wick and a spring. The pair of rollers comprises two toothed wheels and the inker is disposed in a housing adjacent to the wheels. The ink metering wick comprises a bundle of capillary fibres and is disposed between the inker and the wheel. The spring presses on the metering wick to hold the fibres at one end in constant contact with the outside surface of the wheel. The crests of the teeth of the wheels are of a rounded section and the inker is of a parallelepipedic shape, is of polyester fibres with external co-extrusion and contains an amount of ink such as to occupy only half the volume of the inker. The metering wick is cylindrical and is of a longitudinal section of rhomboidal shape. The bunch of capillary filaments is formed by fibres of elasticized nylon impregnated with phenol resin. The ends of the capillary filaments co-operate with the rounded crests of the teeth of the wheel and the spring acts on the side surface of the capillary filaments to hold the ends of the filaments and the teeth of the wheel in constant contact.
REFERENCES:
patent: 4115012 (1978-09-01), Ploeger
patent: 4130367 (1978-12-01), Guerrini
patent: 4279519 (1981-07-01), Shiurila
patent: 4340313 (1982-07-01), Bishop
patent: 4465388 (1984-08-01), Iwasawa
patent: 4616942 (1986-10-01), Nagasawa
patent: 4639153 (1987-01-01), Cheng
Fausto Bruno
Motta Carlo
Ricca Aldo
Trimboli Walter
Ing. C. Olivetti & C. S.p.A.
Sewell Paul T.
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