Fixing apparatus and image forming apparatus
AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
InventorHiroshi Ota
Life of this patent
Estimating the term…
Abstract
An warming-up operation is performed by driving the first coil and the second coil in accordance in an operating mode already stored, until the temperatures T1 and T2 detected by the first and second temperature sensors, respectively, reach preset value Ts. A temperature rise ΔT1 per unit time of the temperature T1 detected by the first temperature sensor during the warming-up operation is determined. Also, temperature rise ΔT2 per unit time of the temperature T2 detected by the second temperature sensor during the warming-up operation is determined. The operating mode is updated to such an operating mode that the temperature rises ΔT1 and ΔT2 determined by the second control section become equal to each other.
Claims20
(canceled)
A fixing apparatus comprising:
- a heating member which rotates;
- a first and second coils located at the parts proximity to the heating member;
- a first resonant circuit including the first coil as a structural element;
- a second resonant circuit including the second coil a structural element;
- a drive circuit which drives the first and second resonant circuits;
- a first temperature sensor located at the part of the heating member according to the first coil;
- a second temperature sensor located at the part of the heating member according to the second coil;
- and
- a control section which controls the drive circuit,
- wherein the control section detects a temperature rise rate per unit time of the temperature detected by the first temperature sensor and a temperature rise rate per unit time of the temperature detected by the second temperature sensor, and controls the temperature rise rates to become equal each other.
A fixing apparatus comprising:
- a heating member which rotates;
- a first and second coils located at the parts proximity to the heating member;
- first resonant means including the first coil as a structural element;
- second resonant means including the second coil a structural element;
- drive means for driving the first and second resonant means;
- first temperature means for detecting a temperature of the heating member according to the first coil;
- second temperature means for detecting a temperature of the heating member according to the second coil;
- and
- control means for controlling the drive means;
- wherein the control means detects a temperature rise rate per unit time of the temperature detected by the first temperature means and a temperature rise rate per unit time of the temperature detected by the second temperature means, and controls the temperature rise rates to become equal to each other.
The apparatus according to claim i 1, wherein the heating member is a heat roller.
A controlling method of a fixing apparatus including a heating member which rotates, a first and second coils located at the parts proximity to the heating member, a first resonant circuit including the first coil as a structural element, a second resonant circuit including the second coil a structural element, a drive circuit which drives the first and second resonant circuits, a first temperature sensor located at the part of the heating member according to the first coil, a second temperature sensor located at the part of the heating member according to the second coil, and a control section which controls the drive circuit, the method comprising:
- detecting a temperature rise rate per unit time of the temperature detected by the first temperature sensor and a temperature rise rate per unit time of the temperature detected by the second temperature sensor;
- and
- controlling the temperature rise rates to become equal to each other.
Dependencies are inferred from the claim text.