Sheet feeding assembly including provision for coordinated actio

Details Sheet feeding assembly including provision for coordinated actio Sheet feeding assembly including provision for coordinated actio

1979-08-06

1982-01-19

Coven, Edward M.

Printing

Rolling contact machines

Rotary

101409, 101242, 271247, 271256, B41F 2106

Patent

active

043110932

ABSTRACT:
A feed assembly for feeding sheets seriatim from a position of register on a feed table to an impression cylinder in a printing press which includes a pre-gripper having an oscillating connection with the press drive for periodically swinging the pre-gripper from a sheet pick-up position at the front edge of the table to a sheet-releasing position at the surface of the impression cylinder. The pre-gripper has a jaw and a jaw lever for opening and closing the jaw. A gripper operating cam is arranged in the path of movement of the jaw lever as the pre-gripper oscillates back and forth, the oeprating cam being mounted for retreating and return movement to control the opening and closing movement of the jaw. A rotating control cam coupled to the press drive has a control cam follower with a linkage for connecting the same to the gripper operating cam for controlling its retreating and return movement so that the jaw is closed upon an awaiting sheet at the pick-up position. The same linkage is also coupled to the front stop via an adjustable lost motion connection for moving the front stop to a retracted position only after a predetermined movement of the gripper operating cam and timed with closure of the jaw. A pawl interposed in the path of movement of the control cam follower silences both the jaw and the front stop to terminate the feeding of sheets.

REFERENCES:
patent: 1984588 (1934-12-01), Liebusch
patent: 3788639 (1974-01-01), Bou
patent: 3822644 (1974-07-01), Gazzola et al.
patent: 3921523 (1975-11-01), Jahme
patent: 3992993 (1976-11-01), Kuhn et al.
patent: 4085673 (1978-04-01), Wierszewski

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