Adjustable ribbon feed rates dependent upon ribbon type for ink

Details Adjustable ribbon feed rates dependent upon ribbon type for ink Adjustable ribbon feed rates dependent upon ribbon type for ink

1981-02-02

1984-04-03

Wright, Jr., Ernest T.

Typewriting machines

Including interposed inking device for record-medium

Package for ribbon facilitating mounting of ribbon on...

4002272, 400229, 400232, 4006971, B41J 3200

Patent

active

044405146

ABSTRACT:
A feed mechanism for advancing an ink ribbon, supported in a cartridge which is inserted into a typing machine, in feeding steps whose length is determined in dependence upon the type of the ribbon, the mechanism including: a feed roller rotatably mounted in the cartridge for engaging the ribbon to advance it in feeding steps, the roller being selected from a plurality of rollers having respectively different diameters on the basis of the type of the ribbon; a driving device mounted in the machine and including a pressure roller movable into a position against the feed roller when the cartridge is inserted in the machine; and a mechanism for rotating the feed roller in angular steps for advancing the ribbon in corresponding feeding steps, which mechanism is settable for causing each angular step of rotation of the feed roller to have a selected one of at least two different magnitudes, each magnitude corresponding to a respectively different ribbon feeding step length, and is coupled to the pressure roller in a manner to be set to produce angular rotation steps of a selected magnitude in dependence on the position of the pressure roller when it is in its position against the feed roller, whereby the magnitude of each ribbon feeding step is automatically determined as a function of the diameter of the selected feed roller.

REFERENCES:
patent: 3346090 (1967-10-01), Goff, Jr. et al.
patent: 3604549 (1971-09-01), Caudill et al.
patent: 3643779 (1972-02-01), Anderson et al.
patent: 3834511 (1974-09-01), Hengelhaupt
patent: 3899065 (1975-08-01), Brignole
patent: 3923141 (1975-12-01), Hengelhaupt
patent: 4010839 (1977-03-01), Guerrini et al.
patent: 4231667 (1980-11-01), Behrendt et al.
patent: 4235664 (1980-11-01), Menke

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