JPH02117560U - - Google Patents

Description

[Brief explanation of drawings]

1 and 2 are block diagrams showing the configuration of the present invention, FIG. 3 is a diagram showing an example of the basic circuit configuration of the fixing device temperature control device according to the present invention, and FIG. 4 is a process when the power is turned on. FIG. 5 is a diagram showing an example of the basic structure of a copying machine to which the fixing device is applied. FIG. 6 is a diagram showing an example of the basic structure of the fixing device. FIG. 7 is a diagram showing the surface of the heating roller. FIG. 3 is a diagram showing characteristics of temperature distribution and fixing latitude of each toner. [Explanation of symbols], 1... Heater, 2, 31...
Heating roll, 3, 32... Pressure roll, 4... Temperature detection means, 5... Heater control means, 6... Forced idle rotation means, 7... Heating idle rotation means, 39... Temperature sensor, 40... ...CPU, 51...Color selection switch, 52...Toner selection switch, 54...
... Rotating motor, 56... Heater lamp.

Claims (1)

[Claims for Utility Model Registration] (1) A cylindrical heating roll 2 equipped with a linear heater 1 inside, a pressure roll 3 that is in pressure contact with the heating roll 2 and rotates together with the heating roll 2; The fixing device includes: a temperature detection means 4 for detecting the surface temperature of the heating roll 2 at a predetermined position; and a heater control for controlling the heater so that the temperature detected by the temperature detection means 4 becomes a predetermined set temperature. Means 5
In a temperature control device for a fixing device, the heater 1 is forcibly held in the off state when the temperature detected by the temperature detection means 4 reaches the set temperature, and the heating roll 2 and the heating roll 2 are brought into pressure contact. A temperature control device for a fixing device characterized by comprising forced idle rotation means 6 for idling both a pressure roll 3 and a pressure roll 3 for a predetermined period of time. (2) In a fixing device equipped with a cylindrical heating roll 2 equipped with a linear heater 1 inside, and a pressure roll 3 that is in pressure contact with the heating roll 2 and rotates together with the heating roll 2, Temperature detection means 4 that detects the surface temperature at a predetermined position of the heating roll 2; Heater control means 5 that performs heater control so that the temperature detected by the temperature detection means 4 becomes a predetermined set temperature.
In a temperature control device for a fixing device, the heater 1 is forcibly held in an OFF state when the temperature detected by the temperature detection means 4 reaches the set temperature, and the heating roll 2 and the heating roll 2 are brought into pressure contact. A forced idle rotation means 6 that idles both the pressure roll 3 for a predetermined time; and a forced idle rotation means 6 that idles both the heating roll 2 and the pressure roll 3 for a predetermined time to release the forced off state of the heater 1 and bring the pressure roll 3 into a pressed state. 1. A temperature control device for a fixing device, comprising: a heating idle rotation means 7 for rotation. (3) The fixing device temperature control device according to claim 1, further comprising a time setting means for setting the idle rotation time of the forced idle rotation means 6 according to the type of toner to be fixed. Fuser temperature control device. (4) The temperature control device for a fixing device according to claim 2, further comprising: a first time setting means for setting an idle rotation time in the forced idle rotation means 6 according to the type of toner to be fixed; 1. A temperature control device for a fixing device, comprising: second time setting means for setting the idle rotation time of the heating idle rotation means 7 according to the type of toner.