Print hammer

Details Print hammer Print hammer

1982-01-15

1983-10-04

Coven, Edward M.

Printing

Selective or progressive

Bed and platen machines

101 9348, B41J 930

Patent

active

044071949

ABSTRACT:
An improved print hammer incorporating crossed-spring support wires having a round cross section so as to render the hammer relatively flexible in a direction lateral to hammer travel during printing. The spring wires are connected between a lower body portion and a foot section. The lower body portion and foot section are designed so that the spring wires enter them substantially perpendicularly, thereby reducing stress. The foot section incorporates a pair of mounting pegs which serve to accurately locate the hammers in a hammer bank assembly. A pair of weights can be included on the spring wires in order to dampen recoil motion which occurs after the hammer impacts against a print character. The crossing point of the spring is positioned so that the springs are flexed by a constant bending moment, thereby reducing stress on the springs.

REFERENCES:
patent: 3172353 (1965-03-01), Helms
patent: 3279362 (1968-10-01), Helms
patent: 3568593 (1971-03-01), Papadopoulos
patent: 3905294 (1975-09-01), Barris et al.
patent: 3941052 (1976-03-01), Dalziel
patent: 3983806 (1976-10-01), Ishi
patent: 4037532 (1977-07-01), Plaza et al.

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