FIXING APPARATUS AND IMAGE FORMING APPARATUS INCLUDING THE SAME
First Claim
1. A fixing apparatus, comprising:
- a fixing member which is rotatable;
a pressure member for pressing the fixing member; and
an external heating member for coming into contact with a surface of the fixing member so as to heat the surface from outside, a recording material being allowed to pass through a space between the fixing member and the pressure member so as to fix a toner image formed on the recording material,said fixing apparatus comprising a control section for controlling a state in which the fixing member is driven and for controlling a state in which power is supplied to heat sources respectively provided in the fixing member and the external heating member, whereinthe control section carries out a first fixing member maintenance process, in which the fixing member is kept rotating also after stopping supplying power to the heat source of the external heating member, when shifting from a temperature raising step for raising a surface temperature of the fixing member so that the surface temperature is equal to a preset fixing temperature to a standby mode so as to stop supplying power to the heat source of the external heating member.
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Accused Products
Abstract
A fixing apparatus and an image forming apparatus of the present invention are arranged so that a fixing control section causes a fixing roller to additionally rotate so that the additional rotation corresponds to a driving delay time also after turning OFF an external heating roller heater when shifting from a temperature raising step in which surface temperature of the fixing roller is raised so as to be equal to a preset fixing temperature to a standby mode and when turning OFF the external heating roller heater and stopping the fixing roller. As a result, it is possible to provide a fixing apparatus and an image forming apparatus in which a surface of a fixing roller is free from deterioration or breakage caused by local heating carried out by an external heating roller.
12 Citations
10 Claims
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1. A fixing apparatus, comprising:
- a fixing member which is rotatable;
a pressure member for pressing the fixing member; and
an external heating member for coming into contact with a surface of the fixing member so as to heat the surface from outside, a recording material being allowed to pass through a space between the fixing member and the pressure member so as to fix a toner image formed on the recording material,said fixing apparatus comprising a control section for controlling a state in which the fixing member is driven and for controlling a state in which power is supplied to heat sources respectively provided in the fixing member and the external heating member, wherein the control section carries out a first fixing member maintenance process, in which the fixing member is kept rotating also after stopping supplying power to the heat source of the external heating member, when shifting from a temperature raising step for raising a surface temperature of the fixing member so that the surface temperature is equal to a preset fixing temperature to a standby mode so as to stop supplying power to the heat source of the external heating member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- a fixing member which is rotatable;
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10. An image forming apparatus, comprising a fixing apparatus which includes:
- a fixing member which is rotatable;
a pressure member for pressing the fixing member; and
an external heating member for coming into contact with a surface of the fixing member so as to heat the surface from outside, a recording material being allowed to pass through a space between the fixing member and the pressure member so as to fix a toner image formed on the recording material,said fixing apparatus including a control section for controlling a state in which the fixing member is driven and for controlling a state in which power is supplied to heat sources respectively provided in the fixing member and the external heating member, wherein the control section carries out a first fixing member maintenance process, in which the fixing member is kept rotating also after stopping supplying power to the heat source of the external heating member, when shifting from a temperature raising step for raising a surface temperature of the fixing member so that the surface temperature is equal to a preset fixing temperature to a standby mode so as to stop supplying power to the heat source of the external heating member.
- a fixing member which is rotatable;
Specification