Print gap setting in an impact printer

Details Print gap setting in an impact printer Print gap setting in an impact printer

1993-10-18

1995-12-12

Wiecking, David A.

Typewriting machines

Including adjustment for optimum printing plane

400 59, 40012405, B41J 25304

Patent

active

054743915

ABSTRACT:
An impact printer having a print head, the print head having a movable armature, a printing wire fixed to the armature, and sensor for detecting movement of the armature. The position of the armature is monitored based on an output of the sensor. A home sensor detects whether the print head is at a home position. A paper end sensor detect whether a printing medium is between the platen and the print head. A gap motor means adjusts a gap between the printing wire and the platen. A gap controller is responsive to detection signals output by said home sensor and said paper end sensor, for controlling the print head to swing the armature so as to cause the tip of said printing wire to strike the platen, determining a time of impact of the tip with the platen based on the monitored position of the armature, performing a comparison of the time of impact with a predetermined impact time, and outputting a drive signal to the gap motor for adjusting the gap according to a result of the comparison.

REFERENCES:
patent: 5078517 (1992-01-01), Hiroshi et al.
patent: 5088842 (1992-02-01), Ito et al.
patent: 5137377 (1992-08-01), Ito et al.
patent: 5205658 (1993-04-01), Iriguchi

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