Thermofixing device for a printing or copying machines having a low temperature preheating saddle

US5568241A · kind A · utility

Assignee

• Siemens Nixdorf Informationssysteme AG · DE

Inventors

• Edmund Creutzmann · Borgo San Lazzaro, DE
• Andreas Eckardt · Hersbruck, DE
• Joachim Hoffmann · Esslingen am Neckar, DE
• Walter Kopp · Taufkirchen, DE
• Josef Windele · Puchheim, DE

Key dates

• Filing date: Apr 20, 1995
• Grant date: Oct 22, 1996
• Expiry date: Apr 20, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G15/2003
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A thermofixiug device for fixing toner images on a strip-shaped or sheet-like recording substrate (17) of an electrophotographic printing or copying machine contains a thermoprinting fixing station (11, 12) and a heated preheating saddle (15) located upstream of the thermoprinting fixing station in the recording substrate running direction. The preheating saddle (15) is designed as a low temperature saddle with the largest possible constructional length, so that the temperature difference between recording substrate (17) end saddle surface (24) is as small as possible. The preheating saddle has, in the recording substrate running direction, a plurality of heating zones (21, 23). A control device controls the heating zones (21, 23) in such a manner that, along the preheating saddle (15), an approximately constent thermal energy flow occurs on the saddle surface (24) to the recording substrate (17). For matching the preheating saddle (15) to various recording substrate widths, the preheating saddle is subdivided, transversely to the recording substrate heating direction, into individually drivable transverse heating zones (30/1 to 30/3).