Fixing device

Abstract

Abstract PURPOSE:To attain rapid and stable fixing with low energy consumption by specifying the contact pressure and contact width of both rollers and changing an advancing interval between image supporting members to be successively advanced into paired rollers in accordance with a detecting temperature on the surface of the rolls. CONSTITUTION:Transfer paper P to which a toner image is transferred is held and carried between a heat roller 14 and a press roll 13 pressed against the roller 14 and toner is softened and fixed on the transfer paper P. Pressure applied between the rollers 13, 14 is <=20-100kg/cm<2> and the contact width of the rollers 12, 13, is 0.8-6mm. The roller 13 is obtained by forming the thick film of high-elasticity heat-resistive resin or high-hardness rubber 13b on the periphery of a hollow metal roller 13a and the roller 14 is obtained by forming a thin film of resin 14b with low surface energy on the periphery of a hollow metal roller 14a. The advancing interval of transfer paper P successively advanced into the space between the rollers 13, 14 is changed in accordance with the detecting temperature of temperature sensors 18, 19 and the elasticity of the surface material of the roller 13 is approximately fixed. Consequently, proper fixing can be attained with low energy.

Inventors

• 👤 Tatsuo Takeuchi
• 👤 達夫 竹内

Bibliographic Details