Sheet transport arrangement for printing machines

Details Sheet transport arrangement for printing machines Sheet transport arrangement for printing machines

1988-08-02

1989-05-02

Eickholt, Eugene M.

Printing

Planographic

Rotary machines

101232, 271270, 271236, 271245, B41F 900

Patent

active

048257621

ABSTRACT:
To increase the operating speed of a printing machine in which sheets are fed from a make-ready table (5) to a printing system (P, G; 2, 3, 65, 63), sheets are fed to the make-ready table in a transport direction and a lateral force is applied to the sheets as they are being fed to the make-ready table, for example by inclined belts (6-9). A feed roller, operating at a rotationally non-uniform speed, accelerates sheets gripped between the feed roller (18) and a counter roller (32) and the accelerated sheets then impinge on front register stops (50; 59) on either a transfer cylinder (34) or the impression cylinder (60) itself, the transfer cylinder or the impression cylinder, respectively, being driven at rotational non-uniform speed, first slightly slower than the accelerated speed of the sheets to ensure gentle impingement on the front register stops of the transfer cylinder or the impression cylinder, and then, after being gripped, the respective cylinder accelerates to a speed which , for the transfer cylinder, will be the same as an associated impression cylinder or, for the impression cylinder itself, to the same speed as the cylinders of the printing system.

REFERENCES:
patent: 2335954 (1943-12-01), Neal
patent: 2708405 (1955-05-01), Gegenheimer
patent: 3593662 (1971-07-01), Gates
patent: 3764128 (1973-10-01), Bolza-Schuneman
patent: 3858508 (1975-01-01), Kaneko et al.
patent: 3954494 (1976-05-01), Suzuki
patent: 3960079 (1976-06-01), Cape III
patent: 4423677 (1984-01-01), Fisher

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