Apparatus for pressing a print head in a printer

Details Apparatus for pressing a print head in a printer Apparatus for pressing a print head in a printer

1991-06-18

1993-01-05

Burr, Edgar S.

Typewriting machines

Including type-set-assemblage mounted on carrier and...

Imprint by pivoting of type-head-carrier and type-head...

400120, B41J 2302, B41J 2312

Patent

active

051764598

ABSTRACT:
An apparatus for pressing a print head against a platen roll in a printer, which comprises a rotating profiled cam supporting the print head for moving the print head toward and away from the platen roll, a shaft in the center of and integral with the cam for rotating the cam, the profile of the claim having an arcuate cam edged section points of which along the arcuate edge section are at a gradually and smoothly continuously increasing distance from the shaft, and a circular cam edge section seamlessly continuously adjoining the arcuate edge section, points of the circular cam edge section along the circular edge being equidistant from the shaft, whereby the print head supported from the edge section of the cam is pressed against the platen roll at a constant pressure when the print head is supported from the circular edge section of the cam.

REFERENCES:
patent: 4775869 (1988-10-01), Minowa
patent: 4911566 (1990-03-01), Imaseki et al.
patent: 5036338 (1991-07-01), Imai

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