Sheet feeding assembly including provision for coordinated action of pre-gripper and front stop

US4311093A · kind A · utility

Assignee

• MAN Roland Druckmaschinen AG · DE

Inventors

• Paul Abendroth · Offenbach am Main, DE
• Helmust Emrich · Offenbach am Main, DE

Key dates

• Filing date: Aug 6, 1979
• Grant date: Jan 19, 1982
• Expiry date: Aug 6, 1999

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H5/10
• WIPO field: Handling
• WIPO sector: Mechanical engineering

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…