Delivery sheet brake for a sheet-fed printing press

Details Delivery sheet brake for a sheet-fed printing press Delivery sheet brake for a sheet-fed printing press

1989-10-25

1991-04-30

Schacher, Richard A.

Sheet feeding or delivering

Delivering

With transfer means between conveyor and receiver

271204, B65H 2968

Patent

active

050111256

ABSTRACT:
A delivery sheet brake for a sheet-fed printing press having a suction element for gripping a sheet at a trailing edge thereof, the suction element being disposed on an adjustable slide for format adjustment and being guidably movable on a closed path loop extending through a transfer position and a release position for the sheet, and a step-up transmission connecting the suction element to a uniformly revolving drive element disposed likewise on the slide, said transmission including an articulated lever for accelerating the suction element to sheet travel speed before it reaches the transfer position and decelerating the suction element after sheet transfer until the suction element reaches the release position, including a chain wheel connected to the drive element disposed on the adjustable slide, a drive chain directly connecting the chain wheel with a chain wheel of a drive for the printing press, and a chain-storage device for the drive chain, the chain-storage device being in cooperative engagement with the drive chain so as to compensate for changes in length of the drive chain without any phase displacement of the chain wheels.

REFERENCES:
patent: Re25283 (1962-11-01), Yingling
patent: 2130841 (1938-09-01), Eckhard
patent: 3378256 (1968-04-01), Ellis et al.
patent: 3702698 (1972-11-01), Schwebel

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