Constant printing pressure mechanisms for label printing machine

Details Constant printing pressure mechanisms for label printing machine Constant printing pressure mechanisms for label printing machine

1979-10-22

1981-10-06

Pieprz, William

Printing

Bed-and-platen machines

Web

B41J 500

Patent

active

042928940

ABSTRACT:
A constant printing pressure mechanism for a label printing machine: in one embodiment, a pressure applying roller is attached to the free ends of the yokes or printing levers that support the printing head; a resilient pressure receiving member which is pivotally supported on the machine frame and is abutted by the pressure roller; when the hand lever is squeezed, the pressure roller is pressed to the pressure receiving member; when the force of the pressure roller both pivots the receiving member a permitted maximum distance and overcomes the compressive stress in the resilient pressure receiving member and deflects the member, then the printing stroke is effected; in another embodiment, the pressure applying roller is on the frame and the resilient pressure receiving means is on the hand lever; the pressure receiving means comprises: a supporting member attached to a hand lever; a pressure controlling member which is pivotally secured to the hand lever; a pressure receiving piece having a cam surface on the front side thereof and being pivotally secured to the pressure controlling member; and a spring member which is interposed between the supporting member and the pressure controlling member.

REFERENCES:
patent: 1064674 (1913-06-01), Ursbruck
patent: 3197011 (1965-07-01), Kuramachi
patent: 3362326 (1968-01-01), Delpo et al.
patent: 3729080 (1973-04-01), Mueller
patent: 3902952 (1975-09-01), Penaluna
patent: 3911817 (1975-10-01), Becker
patent: 4208964 (1980-06-01), Sato

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