Image heating apparatus and heater for heating image
First Claim
1. An image heating apparatus comprising:
- a heater including a long base material;
a temperature detecting element for detecting temperature of said heater; and
a film having a first surface which slides on said heater and a second surface which moves while contacting a recording material bearing an image, wherein (a) said heater is controlled by an output from said temperature detecting element to obtain a predetermined temperature and the image on the recording material is heated by heat from said heater via said film, (b) said heater further comprises a first heating member and a second heating member shorter than said first heating member which are disposed along a longitudinal direction of said base material and generate heat by being energized (c) said first heating member is disposed on an upstream side of said second heating member with respect to a moving direction of the recording material, (d) when a first size recording material is heated, said first heating member is energized and said second heating member is not energized, and (e) when a second size recording material smaller than said first size recording material is heated, said first heating member and said second heating member are energized.
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Accused Products
Abstract
The present invention relates to an image heating apparatus in which a heater being controlled by an output from a temperature detecting element to obtain a predetermined temperature and an image on a recording material being heated by heat from the heater via a film, the heater having a first heating member disposed along a longitudinal direction of a base material and heated by energizing and a second heating member shorter than the first heating member, the first heating member being disposed on an upstream side of the second heating member with respect to a moving direction of the recording material, and when a first size recording material is heated, the first heating member being energized and the second heating member being not energized, when a second size recording material smaller than the first size recording material is heated, the first heating member and the second heating member being energized.
96 Citations
31 Claims
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1. An image heating apparatus comprising:
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a heater including a long base material;
a temperature detecting element for detecting temperature of said heater; and
a film having a first surface which slides on said heater and a second surface which moves while contacting a recording material bearing an image, wherein (a) said heater is controlled by an output from said temperature detecting element to obtain a predetermined temperature and the image on the recording material is heated by heat from said heater via said film, (b) said heater further comprises a first heating member and a second heating member shorter than said first heating member which are disposed along a longitudinal direction of said base material and generate heat by being energized (c) said first heating member is disposed on an upstream side of said second heating member with respect to a moving direction of the recording material, (d) when a first size recording material is heated, said first heating member is energized and said second heating member is not energized, and (e) when a second size recording material smaller than said first size recording material is heated, said first heating member and said second heating member are energized. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 29, 30, 31)
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13. A heater for heating an image, said-heater comprising:
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a long base material;
a temperature detecting element for detecting temperature; and
a first heating member and a second heating member shorter than said first heating member which are disposed along a longitudinal direction of said base material and generate heat by being energized, wherein (a) said first heating member and said second heating member are arranged in a direction orthogonal to the longitudinal direction of said base material, heat generating areas of said first heating member and said second heating member in a longitudinal direction of said base material are overlapping, (b) said first heating member is disposed for heating a first size recording material and a second size recording material smaller than the first size recording material, and (c) said second heating member is disposed for heating the second size recording material. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A heater for heating an image, said heater comprising:
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a long base material;
a first heating member;
a second heating member, said second heating member being shorter than said first heating member; and
a third heating member, said third heating member having substantially a same length as a length of said first heating member, wherein (a) said first heating member, said second heating member, and said third heating member are each disposed along a longitudinal direction of said base material and generate heat by being energized, (b) said first heating member, said second heating member and said third heating member are arranged in a direction orthogonal to the longitudinal direction of said base material, heat generating areas of said first heating member, said second heating member and said third heating member in a longitudinal direction of said base material are overlapping, and (c) said second heating member is disposed between said first heating member and said third heating member with respect to the direction orthogonal to the longitudinal direction of said base material. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification