Sheet-fed printing press

Details Sheet-fed printing press Sheet-fed printing press

1990-07-02

1991-12-24

Burr, Edgar S.

Printing

Rolling contact machines

Rotary

101219, 101225, B41F 1324

Patent

active

050742086

ABSTRACT:
A sheet-fed printing press with a sheet feeder and a printing unit traction device connecting the sheet feeder and the printing unit to one another, the traction device having a taut side and a slack side, a phase-adjustment device acting upon the traction device for changing a phase angle between an input shaft and an output shaft by means of a change in the length of the taut side, one of the shafts being assigned to the sheet feeder and the other to the printing unit, the phase-adjustment device acting between the slack side and the taut side along a substantially vertical line disposed centrally with respect to the shafts, the phase-adjustment device comprising an adjustably disposed guide for the taut side of the traction device, and a guide for the slack side of the traction device, tensioning elements acting between the taut-side guide and the slack-side guide for prestressing the slack-side guide against the slack side of the traction device, the slack-side guide together with the taut-side guide being movable along the substantially vertical line so as to effect the phase adjustment, the tensioning elements being effective in a phase wherein the traction device is disposed.

REFERENCES:
patent: 976115 (1910-11-01), Bard
patent: 1819743 (1931-08-01), Duncan
patent: 4376531 (1983-03-01), Breunig
patent: 4791869 (1988-12-01), Furukawa
Xerox Technical Disclosure Journal, vol. 2, No. 6, Nov./Dec. 1977, "Registration and Tension Adjusting Mechanism", Schoppe et al., pp. 87, 88.

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