IMAGE HEATING APPARATUS AND IMAGE FORMING APPARATUS
First Claim
Patent Images
1. An image heating apparatus comprising:
- a heating unit which includes a heater having a plurality of heating elements arranged in a direction perpendicular to a transporting direction of a recording material, and heats an image formed on the recording material using the heat of the heater;
a pressure member which forms a nip portion by press-contacting the heating unit, and rotates, the pressure member having circumference increasing from the center portion toward the ends in the arrangement direction of the plurality of heating elements; and
a control portion which controls power supplied to each of the plurality of heating elements individually,wherein when the nip portion has a region through which the recording material passes, and a part of the region is an image heating region where an image region on the recording material passes through, and the rest of the region is a non-image heating region where a non-image region on the recording material passes through, the control portion controls power supplied to the heating elements corresponding to the non-image heating region, out of the plurality of heating elements, so as to maintain a control target temperature, which is set based on the amount of the image heating apparatus used.
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Accused Products
Abstract
When a nip portion has a region through which a recording material passes, and a part of the region is an image heating region where an image region on the recording material passes through, and the rest of the region is a non-image heating region where a non-image region on the recording material passes through, a control portion controls heating elements corresponding to the non-image heating region, out of the plurality of heating elements, so as to maintain a control target temperature, which is set based on the amount of the image heating apparatus used.
6 Citations
10 Claims
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1. An image heating apparatus comprising:
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a heating unit which includes a heater having a plurality of heating elements arranged in a direction perpendicular to a transporting direction of a recording material, and heats an image formed on the recording material using the heat of the heater; a pressure member which forms a nip portion by press-contacting the heating unit, and rotates, the pressure member having circumference increasing from the center portion toward the ends in the arrangement direction of the plurality of heating elements; and a control portion which controls power supplied to each of the plurality of heating elements individually, wherein when the nip portion has a region through which the recording material passes, and a part of the region is an image heating region where an image region on the recording material passes through, and the rest of the region is a non-image heating region where a non-image region on the recording material passes through, the control portion controls power supplied to the heating elements corresponding to the non-image heating region, out of the plurality of heating elements, so as to maintain a control target temperature, which is set based on the amount of the image heating apparatus used. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification