Longitudinal film stretcher especially for thermoplastic film

US5537726A · kind A · utility

Assignee

• Lindauer DORNIER Gesellschaft mbH · DE

Inventors

• Andreas Rutz · Gettorf, DE
• Adolf Mueller · Weißensberg, DE

Key dates

• Filing date: Apr 12, 1995
• Grant date: Jul 23, 1996
• Expiry date: Apr 12, 2015

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C55/06
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A film or web stretcher particularly for thermoplastic film has a plurality of stretching cylinders, at least one or more of which cooperate with a press-on roller particularly at the inlet and/or outlet of the stretcher. A mounting arm (6) at each end of the stretcher cylinder permits the mounting of the press-on roller in such a way that the latter can be tilted through a limited angular range about the rotational axis of the stretching cylinder by a first drive. A second drive, such as a piston cylinder device adjusts the press-on roller relative to the stretching cylinder to thereby apply a press-on force. The first drive may, for example, be accomplished by a manually driven device for positioning the press-on roller and its cooperating components in any one of two end positions and in any position between the two end positions. The press-on roller may be directly mounted to the mounting arms (6) or through support brackets (9) to the arms (6).