Printer having constant pressure between print head and platen

Details Printer having constant pressure between print head and platen Printer having constant pressure between print head and platen

1985-12-02

1987-12-01

Pearson, Charles A.

Typewriting machines

Including adjustment for optimum printing plane

400120, 101 9303, 346 76PH, 219216, B41J 1120, B41J 304

Patent

active

047100400

ABSTRACT:
A non-impact printer having a biasing mechanism which provides for constant and self-adjusting pressure between the associated print head and platen. The biasing mechanism includes a base member, a pivoting member, and a biasing member. The biasing mechanism has one end which slides longitudinally in an aperture in the pivoting member which is pivotally mounted in the base member which is secured to the frame of the printer, and the remaining end of the biasing member is pivotally jointed to the associated carriage of the printer to move the carriage with the print head thereon into printing relationship with the platen.

REFERENCES:
patent: 2142054 (1938-12-01), Horton
patent: 2226358 (1940-12-01), Sibley
patent: 3990560 (1976-11-01), Pavliscak et al.
patent: 4010834 (1977-03-01), Linder
patent: 4170422 (1979-10-01), Bilek
patent: 4170804 (1979-10-01), Scotcher
patent: 4184063 (1980-01-01), Heiling et al.
patent: 4277189 (1981-07-01), Howard et al.
patent: 4300844 (1981-11-01), Keil
IBM Tech. Disc. Bulletin, "Thermal Print Head Control", Perry, vol. 21, No. 4, Sep. 1978, pp. 1594-1595.
IBM Tech. Disc. Bulletin, "Molded Platen Shaft Bearing Assembly for Office Printers and Typewriters", Olson et al., vol. 25, No. 7B, Dec. 1982, pp. 3863-3864.
IBM Tech. Disc. Bulletin, "Deflectable Wedge-Type, Permanent Tractor Belt Tensioner", Koteff, vol. 27, No. 3, Aug. 1984, pp. 1617-1618.
IBM Tech. Disc. Bulletin, "Securing Element for Axles and Shafts", vol. 27, No. 12, May 1985, pp. 7063-7064.

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