Offset printing machine comprising improved control mechanism

Details Offset printing machine comprising improved control mechanism Offset printing machine comprising improved control mechanism

1976-08-17

1978-04-18

Burr, Edgar S.

Printing

Planographic

Rotary machines

101144, 101232, B41F 706

Patent

active

040845087

ABSTRACT:
A mechanism actuates a sheet feed means after a predetermined length of time after a control lever is moved to a print position, thereby allowing sufficient ink to be transferred to a transfer roller such that the first sheet printed has the same density as subsequent sheets. The mechanism comprises a ratchet and a pawl, the pawl being reciprocatingly driven in synchronism with the transfer roller and advancing the ratchet from a reset position to a position in which it engages with a sheet feed control linkage to activate the sheet feed means in a predetermined number of reciprocations corresponding to the predetermined length of time.

REFERENCES:
patent: 3426678 (1969-02-01), Carper et al.
patent: 3521560 (1970-07-01), Schmidlin et al.
patent: 3702586 (1972-11-01), Kaneko et al.
patent: 3742244 (1973-06-01), Raible
patent: 3749009 (1973-07-01), Suzuki
patent: 3771446 (1973-11-01), Kaneko et al.

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