Automatic gap adjusting mechanism

Details Automatic gap adjusting mechanism Automatic gap adjusting mechanism

1990-03-23

1991-09-24

Burr, Edgar S.

Typewriting machines

Including adjustment for optimum printing plane

By adjustment of carriage

400 56, B41J 1120

Patent

active

050510088

ABSTRACT:
A motor drives, through a gear train, a cam set to force the printhead of a wire matrix printer against the platen and record sheet(s) with a force great enough to cause the cam to stop rotating. Continued driving of the gear train causes one of the gears to be driven around another gear, relieving the drive force. A detection of the stopping of the cams causes the stopping of the drive motor and a slight reversal. This adjusts the head to paper gap regardless of the paper thickness.

REFERENCES:
patent: 4337696 (1982-07-01), Komatsu et al.
patent: 4775869 (1988-10-01), Minowa
patent: 4809025 (1989-02-01), Noguchi
patent: 4929102 (1990-05-01), Mizutani et al.

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