Sheet separator including passage gap adjusting mechanism for separating sheets of various thicknesses from a stack of sheets

US4603848A · kind A · utility

Assignee

• Mathias Baeuerle GmbH · DE

Inventors

• Wilhelm Markgraf · Tennenbronn, DE
• Werner Lehmann · Leinfelden, DE
• Rainer Fecker · Furtwangen, DE

Key dates

• Filing date: Mar 29, 1985
• Grant date: Aug 5, 1986
• Expiry date: Mar 29, 2005

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2511/224
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A sheet separator for a sheet feeder comprises a friction cylinder which is rotatable for feeding a sheet from a stack of sheets. A retaining member is mounted for radial movement with respect to the friction cylinder. The retaining member has a friction surface which holds back other sheets in the stack and which forms with the friction cylinder a passage gap which is adjusted to the thickness of a sheet to be fed. A carrier is connected to and supports the retaining member. An adjustment mechanism is provided between the carrier and the retaining member for adjusting the passage gap width. A bracket is mounted for radial movement on the carrier and has a contact surface for engaging the friction cylinder or a sheet held in the passage gap. Signal switch is provided in the bracket and is activated by a checking element which is movably mounted to the bracket and engaged with either the carrier or the retaining member. The switch changes state when a selected relative position is established between the retaining member and the contact surface of the bracket. A circuit is connected to the switch for indicating its change in state. The selected position is chosen for establishing th…