Adjusting device for varying a phase angle between an input shaft and an output shaft of a chain drive in a sheet-fed printing press

US5170707A · kind A · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventor

• Peter Thoma · Mannheim, DE

Key dates

• Filing date: Sep 11, 1991
• Grant date: Dec 15, 1992
• Expiry date: Sep 11, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S474/90
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An adjusting device for varying a phase angle between a drive shaft and a driven shaft of an endless chain drive extending between a sheet feeder and a printing unit of a printing press and being formed with a tight side and a slack side defining an inner space therebetween includes a first tensioning element for applying a tensioning force outwardly from the inner space against the slack side of the endless chain drive, a second tensioning element for applying a tensioning force outwardly from the inner space against the tight side of the endless chain drive, a slide carrying the first and the second tensioning elements and being displaceable substantially perpendicularly to a plane in which the drive shaft and the driven shaft are disposed, and one additional chain tensioning device for applying a force from outside the endless chain drive against the slack side thereof, the additional chain tensioning device being adjustably movable with respect to the first tensioning element.