Image forming apparatus having speed-changeable image bearing body
AssigneeCanon Kabushiki Kaisha
InventorHikaru Osada
Life of this patent
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Abstract
In an image forming apparatus using a pressuring roller, a carrying speed of the recording paper in the fixing nip part is dominated by a diameter of the pressing roller. Therefore, there is caused a change of speed in that, compared with a carrying speed for a initial diameter of the pressing roller when the pressing roller is not heated at the beginning of the fixing operation, the carrying speed at the fixing nip part is increased after performing the fixing operation continuously because the pressing roller is heated by the heating member so that the outside diameter is increased than the initial diameter.
Claims13
An image forming apparatus comprising:
- an image bearing member;
- a transferring means for transferring an image formed on the image bearing member to a recording material;
- a fixing means for fixing by heat the image transferred on the recording material to the recording material, said fixing means having a carrying member to carry the recording material;
- and
- a speed setting means for setting a moving speed of the image bearing member depending on the kind of the recording material.
An image forming apparatus comprising:
- an image bearing member;
- a transferring means for transferring an image formed on the image bearing member to a recording material;
- and
- a fixing means for fixing by heat the image transferred on the recording material to the recording material, said fixing means having a carrying member to carry the recording material,
- wherein a moving speed of said image bearing member when using a recording material of which a basic weight is a first value is slower than a moving speed of said image bearing member when using a recording material of which a basic weight is a second value greater than the first value.
Dependencies are inferred from the claim text.