Apparatus for positioning covers on stacks of superimposed sheets

US5106069A · kind A · utility

Assignee

• E.C.H. Will GmbH · DE

Inventors

• Wolfram Wolf · Bilsen, DE
• Jurgen Peter · Taufkirchen, DE

Key dates

• Filing date: Oct 31, 1990
• Grant date: Apr 21, 1992
• Expiry date: Oct 31, 2010

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H5/36
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

Apparatus for positioning covers on top of stacks of paper sheets has a transporting unit which advances a series of successive stacks along a first horizontal path and discrete covers along a second horizontal path above and adjacent the first path. The covers are accelerated by advancing along a downwardly sloping portion of the second path immediately ahead of two vertical rotary members which temporarily intercept an oncoming cover until the corresponding stack catches up with the intercepted cover. The lower portion of the stack then moves the rotary members apart to enable the stack and the cover thereon to advance along the first path beyond the rotary members. Each rotary member is mounted on a spring-biased or otherwise biased lever which is pivotable about a vertical axis.