Layboy for depositing sheets, especially sheets of paper, on a stack by count

US5074743A · kind A · utility

Assignee

• Jagenberg Aktiengesellschaft · DE

Inventors

• Georg Schaffner · Neuss, DE
• Ernst Claassen · Goch, DE

Key dates

• Filing date: Mar 15, 1990
• Grant date: Dec 24, 1991
• Expiry date: Mar 15, 2010

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2301/42622
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A layboy for depositing sheets, especially sheets of paper, on a stack by count, with a layoff platform that travels up and down; forks that are positioned at the rear of the stack and that travel horizontally into and out of the vicinity of the stack and up and down; and an auxiliary stack platform that travels up and down and into the vicinity of the layoff platform behind the stack. To deposit sheets more rapidly onto relatively low stacks without losing sheets, the layboy includes at least three independently moving forks (20.1, 20.2 and 20.3); positioning mechanisms (23 and 25) that travel up and down behind the stack and engage and position the forks while they are in the vicinity of the stack; and a lift (24) positioned behind and away from the stack with a device (26) for gripping and moving the forks away from the stack, for lifting them up to the infeed level, and for introducing them into the vicinity of the stack and transferring them to the engaging and positioning mechanisms.