Flash fixing device

Abstract

Abstract PURPOSE:To rationalize electric current consumption by detecting the information for determining the flash energy necessary for fixing of an unfixed toner images and combining required one or plural pieces of flash lamps by the detection signal. CONSTITUTION:Capacitors 6-8 for charging and discharging corresponding respectively to flash lamps 2-4 are charged from a power source circuit 9 via diodes 10-12 for current rectification and reactors 13-15 for improving power factor and the lamps selected by the trigger signal (e) applied from a trigger circuit emit light. The unfixed toner image on recording paper is detected by an image density detecting sensor 20 before the recording paper enters a fixing device and the level of the image density is detected in an image density detecting circuit 21. A determination circuit 21 determines the combination of the flash lamps suitable for irradiating flash energy according to an image level and outputs selectively the signal (e) from the circuit 16. The control may be also executed by detecting the width of the recording paper in place of the image density. The current consumption is thus rationalized.

Inventors

• 👤 Seiichi Kenmochi
• 👤 剣持　成一

Bibliographic Details