Method and apparatus for formation and holding of a loose starting flap of a replacement paper roll, typically a paper roll in a printing machine roll changer

US5330125A · kind A · utility

Assignee

• MAN Roland Druckmaschinen AG · DE

Inventor

• Norbert Dylla · Stadtbergen, DE

Key dates

• Filing date: Nov 3, 1992
• Grant date: Jul 19, 1994
• Expiry date: Nov 3, 2012

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2301/46064
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

To form and hold a loose starting flap (5) of a replacement paper roll (1) in which the replacement paper roll has a starting portion which is adhered to an underlying layer of the roll, with a simple easily made and reliable apparatus, the uppermost layer of the roll is perforated by a perforating wheel (8) or an intermittently operated laser (1008) inwardly of the end edge of the starting portion along a perforation line (3) which extends essentially parallel to the axis of the roll to form a flap portion. A temporary or permanently adhering element, such as a suction roll (912), a suction bar, an adhesively coated strip or bar (812) or a roller (912) with an adhesive surface (9, 909, 912) is moved with respect to the flap portion close to the perforation line (3). The adhering element is then moved relative to the roll, either away from the circumference, radially or otherwise, or the roll is rotated, for example in clockwise direction, so that the uppermost layer will tear at the perforation line and form a flap (5), which will be retained, by adhesion, against the adhering element.