Arrangement for separating and transporting uppermost sheets of a stack of sheets or sheet-like objects

US4591140A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Egon Illig · Stuttgart, DE
• Josef Gentischer · Winnenden, DE
• Wolfgang Schmutz · Rottweil, DE

Key dates

• Filing date: Mar 8, 1984
• Grant date: May 27, 1986
• Expiry date: Mar 8, 2004

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H3/0883
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

An arrangement for separating and transporting uppermost sheets of a stack of sheets or sheet-like objects has a movable suction mouthpiece in which negative pressure acting for adhering the sheet simultaneously controls the movement of the suction mouthpiece in a longitudinal direction in a guide, the movable suction mouthpiece is connected with a valveless pump which produces in a connecting conduit between the suction mouthpiece and the pump periodically alternating negative pressure and positive pressure phases, and the guide of the movable suction piece is arranged so that a movement direction provided by the guide is inclined relative to the direction of the force of gravity at such an angle that the resultant of a lifting movement of the sheet produced during the lower pressure phase of the movable suction mouthpiece and the falling movement produced during the positive pressure phase has a component acting in a desired transporting direction of the sheet.