Back to results
US 7,065,315 B2Granted
Fixing apparatus
AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
InventorsSatoshi Kinouchi, Osamu Takagi, Yoshinori Tsueda, Toshihiro Sone
Life of this patent
Estimating the term…
Abstract
A fixing apparatus of one embodiment of the present invention has a heating member which is heated by induction heating, a pressing member which supplies a predetermined pressure to the heating member, and induction heating mechanisms which supply a predetermined magnetic field to the heating member. The induction heating mechanisms have a plurality of coils. By arranging the adjacent coils and adjacent coils to overlap, the temperature distribution in the length direction of the heating member can be made uniform.
Claims19
A fixing apparatus comprising:
- a heating member which has a cylindrical shape and has a conductor to flow an induced current by induction heating;
- a pressing member which supplies a pressure to the heating member;
- a first induction heating mechanism which includes a first coil;
- a second induction heating mechanism which includes at least one second coil aligned with the first induction heating mechanism in an axial direction of the heating member;
- wherein an end part of the first coil adjacent to the second coil is inclined over 90° to an opposite side of the heating member.
2 more elements
A fixing apparatus comprising:
- a heating member which has a cylindrical shape and has a conductor to flow an induced current by induction heating;
- a pressing member which supplies a pressure to the heating member;
- a first induction heating mechanism which includes a first coil;
- a second induction heating mechanism which includes at least one second coil aligned with the first induction heating mechanism in an axial direction of the heating member;
- wherein
- the first coil has a narrow interval between a central part of the first coil and the heating member, compared with the interval between an end part of the first coil, adjacent to the second coil, and the heating member;
- and
- the second coil has a narrow interval between a central part of the second coil and the heating member, compared with the interval between an end part of the second coil, adjacent to the first coil, and the heating member.
5 more elements
A fixing apparatus comprising:
- a heating member which has a cylindrical shape and has a conductor to flow an induced current by induction heating;
- a pressing member which supplies a pressure to the heating member;
- a first induction heating mechanism which includes a first coil;
- a second induction heating mechanism which includes at least one second coil aligned with the first induction heating mechanism in an axial direction of the heating member;
- wherein
- the second coil has a first interval between a central part of the second coil and the heating member, and a second interval between an end part of the second coil, adjacent to the first coil, and the heating member, the first interval being narrow as compared with the second interval;
- the first coil has a second interval to the heating member in both a central part of the first coil and an end part of the first coil;
- and
- the end part of the first coil, and the end part of the second coil adjacent to the end part of the first coil, are overlapped without contacting each other in a radial direction with respect to the heating member.
6 more elements
A fixing apparatus comprising:
- a heating member which has a cylindrical shape and has a conductor to flow an induced current by induction heating;
- a pressing member which supplies a pressure to the heating member;
- a first induction heating mechanism which includes a first coil;
- a second induction heating mechanism which includes at least one second coil aligned with the first induction heating mechanism in an axial direction of the heating member;
- and
- an abnormal temperature detection mechanism that cuts off the power supplied to the first and second coils when the temperature of the heating member reaches an abnormal value, and is arranged between the first and second coils.
3 more elements
A fixing apparatus comprising:
- a heating member which has a cylindrical shape and has a conductor to flow an induced current by induction heating;
- a pressing member which supplies a pressure to the heating member;
- a first induction heating mechanism which includes a first coil, the first coil having a substantially elliptic shape and a space defined therein;
- a second induction heating mechanism which includes at least one second coil arranged at a position different from a position of the first coil in a direction of rotation of the heating member, the second coil having a substantially elliptic shape and a space defined therein,
- wherein an end of the first coil overlaps with an end of the second coil in the direction of rotation of the heating member, and part of the space of the first coil overlaps with the part of the space of the second coil.
2 more elements
Dependencies are inferred from the claim text.