Print hammer driving means for impact printers

Details Print hammer driving means for impact printers Print hammer driving means for impact printers

1979-08-15

1981-11-03

Coven, Edward M.

Printing

Selective or progressive

Bed and platen machines

101 9348, B41J 936

Patent

active

042979447

ABSTRACT:
A print hammer driving means for impact printers comprising a type drum having a plurality of circumferentially arranged type characters, a plurality of print hammers and a hammer spring for moving each print hammer to the type drum for printing, a wind-up lever engaged with the print hammer for winding the hammer spring, a snatch roll for actuating the wind-up lever and an electromagnet adapted to engage the wind-up lever with the snatch roll. The wind-up lever and the snatch roll are so arranged as to engage with each other during the wind-up period in one printing cycle and to release the print hammer after the wind-up period for printing.

REFERENCES:
patent: 3255693 (1966-06-01), Eissfeldt et al.
patent: 3292531 (1966-12-01), Mutz
patent: 3587456 (1971-06-01), Jaensch
patent: 3623429 (1971-11-01), Imahashi et al.
patent: 3795187 (1974-03-01), Babler
patent: 3832942 (1974-09-01), Murayoshi
patent: 3848527 (1974-11-01), Nihira
patent: 3935813 (1976-02-01), Matsubara
patent: 4009655 (1977-03-01), Matsubara et al.

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