Method and apparatus for reducing a transporting strain on elongated material passing through a treatment chamber

US5172844A · kind A · utility

Assignee

• Bandfabrik Breitenbach AG · CH

Inventor

• Andre Mueller · Hilzingen, DE

Key dates

• Filing date: Feb 24, 1992
• Grant date: Dec 22, 1992
• Expiry date: Feb 24, 2012

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2406/111
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

Thin, elongated material, such as ribbons, tapes, and the like, are passed through a treatment zone or chamber substantially in a frictionless manner to avoid distorting the elongated material. This purpose is achieved in that a plurality of direction changing stations in a treatment chamber simultaneously function as transport stations. The transport is accomplished by a flowing transport fluid which is applied to the elongated material through at least one, preferably several jet nozzles in the direction reversing stations. The fluid is applied in a direction substantially corresponding to the transport direction and passes around a guide surface where it forms a travelling cushion between the guide surface and the elongated material. The flow speed of the fluid corresponds at least to the transport speed or the inlet speed into the chamber. Each direction changing station includes a guide body having a surface around which the elongated material is guided from an inlet side of the guide body to its outlet side. Each station includes the above mentioned nozzles through which the transport fluid is flowing under pressure to form the required jet speeds between the guide surface an…