Process and device for fixing toner onto a substrate or printed material

US6683287B2 · kind B2 · utility

Assignee

• NexPress Solutions LLC · US

Inventors

• Knut Behnke · Kiel, DE
• Hans-Otto Krause · Neviges, DE
• Frank-Michael Morgenweck · Molfsee, DE
• Domingo Rohde · Kiel, DE
• Detlef Schulze-Hagenest · Molfsee, DE
• Gerhard Bartscher · Cologne, DE
• Kai-Uwe Preissig · Dortmund, DE
• Dinesh Tyagi · Fairport, US

Key dates

• Filing date: Dec 4, 2001
• Grant date: Jan 27, 2004
• Expiry date: Apr 22, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G15/2007
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A device and process for fixing a toner onto a substrate or a printed material, especially a sheet-shaped printed material, preferably for a digital printer, which is characterized in that the printed material that has the toner is irradiated with microwaves from at least one microwave emitter, and is heated to melt the toner, and that a toner is used which exhibits a sharp drop of the modulus of elasticity G&#8242; from its solid to its liquid state when it is heated. Preferably, the ratio of the value of the modulus of elasticity G&#8242; of the toner according to the invention at the reference temperature value, calculated from the starting temperature at the beginning of the glass transformation of the toner plus 50&deg; C., to the value of the modulus of elasticity G&#8242; at the starting temperature itself is <10&#8722;5.