Fixing device

Abstract

Abstract PROBLEM TO BE SOLVED: To increase the temperature rising speed of a fixing roll, to shorten warm-up time and to prevent heat energy from being wastefully consumed by performing processing for low heat radiation rate to the surface on the back side of the surface of a heat applying body opposed to a body to which heat is applied. SOLUTION: An induction heating type fixing device is provided with the fixing roller 1 capable of driving and rotating, and a pressure roller 2 driven to be rotated with the rotation of the roller 1. A coil assembly (heating source) 3 is composed of a heat-resistant copper wire coil 9 wound around a heat- resistant bobbin 8 and a core 10 made of ferrite, and supported by a holder 11 fixed on a main body frame. By forming a heat-resistant mold-released layer of fluororesin on the outer surface of the roller 1, separability from a sheet (recording medium) S is improved. On the inner surface of the roller 1, a low heat radiation layer 22 is formed by performing processing for low heat radiation rate such as painting, plating and antioxidation processing so that the heat radiation rate ε of the inner surface of the roller 1 may be lower than that in the case metal constituting the roller 1 is oxidized.

Inventors

• 👤 Eiji Okabayashi
• 👤 英二 岡林

Bibliographic Details