Inking ribbon cartridge having feed rollers with different surfa

Details Inking ribbon cartridge having feed rollers with different surfa Inking ribbon cartridge having feed rollers with different surfa

1978-04-25

1980-07-01

Wright, Jr., Ernest T.

Typewriting machines

Including interposed inking device for record-medium

Endless ribbon or cartridge therefor

4002351, 400636, 400641, B41J 3310

Patent

active

042104033

ABSTRACT:
An inking ribbon cartridge for printers having two rollers between which a flexible film ribbon is drivingly engaged. The rollers are provided on their outer faces with a friction material, with the hardness of the friction material on the roller in contact with the inked face of the ribbon being higher than that of the friction material in contact with the other face of the ribbon. The friction material may be formed by a synthetic material such that the ratio between the hardnesses of the friction materials on the two rollers is between a half and two-thirds. The friction material on each of the two rollers may be formed by a polychloroprene such that the Shore hardness of the friction material on the roller in contact with the inked face of the ribbon is between 60 and 110.

REFERENCES:
patent: 625616 (1899-05-01), Uhlig
patent: 944746 (1909-12-01), Rice
patent: 1098840 (1914-06-01), Rennie
patent: 3042179 (1962-07-01), Stern
patent: 3430748 (1969-03-01), Parri
patent: 3973707 (1976-08-01), Pratt et al.
patent: 3974906 (1976-08-01), Lee et al.
patent: 3977512 (1976-08-01), Teagarden et al.
patent: 4011933 (1977-03-01), Kern
patent: 4053042 (1977-10-01), Hess
patent: 4091914 (1978-05-01), Stipanuk

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