Fixing device and image forming apparatus
AssigneeKonica Corporation
InventorsHiroshi Fuma, Hisayoshi Nagase
Life of this patent
Estimating the term…
Abstract
The fixing device having therein the heating member for heating a toner image, the pressure applying member arranged to face the heating member for performing a pressure contact to the heating member, an urging means which urges the pressure applying means, and a changeover means which changes the condition of the pressure applying member from the pressure contact condition to the heating member to the pressure contact released condition by controlling the urging means, wherein urging power by the urging means under the pressure contact released condition is lower than that under the pressure contact condition.
Claims16
A fixing device comprising:
- a heating member for heating a toner image;
- a pressure applying member arranged to face a heating member for performing a pressure contact to the heating member;
- an urging member for urging the pressure applying member;
- and
- a changeover device to control the urging member so as to change a condition of the pressure applying member between a pressure contact condition to the heating member and a pressure contact released condition,
- wherein urging power of the urging member under the pressure contact released condition is lower than that under the pressure contact condition.
A fixing device comprising:
- a heating member for heating a toner image;
- a pressure applying member for contacting with or separating from the heating member;
- a changeover device for switching conditions of the heating member and the pressure applying member between a pressure contact condition and a pressure contact released condition;
- and
- a driving device for driving the heating member and the pressure applying member under the pressure contact released condition,
- wherein fixing is conducted by making a recording material carrying thereon the toner image to pass between the heating member and the pressure applying member, under the condition that the pressure applying member is brought into pressure contact with the heating member,
- and wherein, when the changeover device changes the condition from the pressure contact released condition to the pressure contact condition, the changeover device conducts switching, under the condition that either one of the heating member and the pressure applying member is separated from the driving device and moving by inertia, while the other member is connected to the driving device to move.
A fixing device comprising:
- a heating member for heating a toner image;
- a pressure applying member for contacting with or separating from the heating member;
- and
- a driving device for driving the heating member and the pressure applying member under the condition that the pressure applying member is released from the heating member,
- wherein fixing is conducted by making a recording material carrying thereon the toner image to pass between the heating member and the pressure applying member, under the condition that the pressure applying member is brought into pressure contact with the heating member,
- and wherein the driving device drives either one of the heating member and the pressure applying member through a torque limiter.
Dependencies are inferred from the claim text.