Control system for thermal printing typewriters or like machines

Details Control system for thermal printing typewriters or like machines Control system for thermal printing typewriters or like machines

1984-02-22

1985-11-19

Burr, Edgar S.

Typewriting machines

Typing by other than type-face or type-die

Thermal

346 76PH, 219216, B41J 320

Patent

active

045538611

ABSTRACT:
A typewriter having a thermal print head defining an array of print elements and a thermal print ribbon, both of which are supported on a carriage movable relative to a platen, is provided with a control system which responds to a character print command to move the print head into controlled pressure contact with the platen and to engage a substantially play free clutch for coupling carriage movement initiated by a print command to advance ribbon opposite the direction of carriage movement whereby relative movement between said ribbon and platen is avoided during printing.

REFERENCES:
patent: 3295394 (1967-01-01), Whateley
patent: 3370486 (1968-02-01), Lamburn
patent: 3810192 (1974-05-01), Okabe
patent: 4039065 (1977-08-01), Seki et al.
patent: 4151397 (1979-04-01), Boor, Jr. et al.
patent: 4329075 (1982-05-01), Applegate et al.
patent: 4414862 (1983-11-01), Svab
IBM Tech. Disc. Bulletin, "Ribbon Drive", Darwin, D. P., vol. 19, No. 4, Sep. 1976, pp. 1407-1408.
IBM Tech. Disc. Bulletin, "Thermal Print Head Suspension", Schweighs et al., vol. 21, No. 12, May 1979, pp. 4959-4960.
IBM Tech. Disc. Bulletin, "Ribbon Feed Mechanism", Breski et al., vol. 22, No. 7, Dec. 1979, pp. 2710-2711.

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