Method and apparatus for forming a stream of partially overlapping paper sheets or the like

US4364552A · kind A · utility

Assignee

• E.C.H. Will GmbH · DE

Inventor

• Alfred Besemann · Hamburg, DE

Key dates

• Filing date: Sep 19, 1980
• Grant date: Dec 21, 1982
• Expiry date: Sep 19, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T83/2042
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A series of separate paper sheets issuing from a cross cutter wherein a running paper web is subdivided into discrete sheets is converted into a stream of partly overlapping sheets by transporting the sheets of the series at a first speed onto the upper reach of a belt conveyor which is driven at a lower second speed. A cylindrical braking roller is adjacent to the sheet-receiving end of the upper reach of the belt conveyor and is driven at a peripheral speed matching the second speed. A flat of the otherwise cylindrical peripheral surface of the braking roller is adjacent to but out of contact with the leading edges of successive sheets of the series but the cylindrical surface of the roller engages the intermediate portions of successive sheets and decelerates such sheets from the first to the second speed. This ensures that reaction liquid cannot escape at the leading edges of successive sheets which constitute carbon-free pressure-sensitive copy paper sheets. The belt conveyor is located at a level below the level of oncoming sheets which advance at the first speed and cooperates with a rotary cam having a lobe which pushes the trailing edges of successive decelerated sheets on…