公开(公告)号：US20190286030A1

公开(公告)日：2019-09-19

申请号：US15922244

申请日：2018-03-15

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA TEC KABUSHIKI KAISHA

Inventor： Katsutoshi MITA

IPC: G03G15/20

Abstract: A fixing apparatus comprises a rotating body that conveys a sheet in a first direction, first and second heating sections, and first and second temperature detectors. In the first heating section, a calorific value per unit length in a second direction orthogonal to the first direction, at the center of the first heating section is larger than that at both ends thereof. In the second heating section, a calorific value per unit length in the second direction, at both ends of the second heating section is larger than that at the center thereof. The first temperature detector is configured to detect a temperature of a central part of a heating area of the rotating body heated by one of the first and second heating sections. The second temperature detector is configured to detect a temperature outside of the heating area of the rotating body.

公开(公告)号：US20200012214A1

公开(公告)日：2020-01-09

申请号：US16270128

申请日：2019-02-07

Applicant: TOSHIBA TEC KABUSHIKI KAISHA

Inventor： Katsutoshi MITA

IPC: G03G15/20

Abstract: According to one embodiment, a fixing device comprises a heating rotator to contact a medium, such as a sheet of paper, on which a toner image has been disposed. A heater is inside the heating rotator to heat the medium. A pressurizing rotator is configured to press against the heating rotator to form a nip through which the medium passes. A controller is configured to drive the heater to heat the heating rotator to a target temperature. The controller is configured to set the target temperature according to a length of a standby time between an end of a first image forming process to a start of a second image forming process after the first image forming process.

公开(公告)号：US20240310762A1

公开(公告)日：2024-09-19

申请号：US18184996

申请日：2023-03-16

Applicant: Toshiba Tec Kabushiki Kaisha

Inventor： Katsutoshi MITA

IPC: G03G15/20

CPC classification number: G03G15/205 ,  G03G15/2064

Abstract: An image forming apparatus includes a conveyor configured to convey a printing medium, an image forming station that forms an image on the printing medium, a fixing device including a fixing roller, a pressurizing roller positioned opposite the fixing roller, and a heater configured to heat a paper passing region between the fixing roller and the pressurizing roller, a temperature sensor that detects a temperature of a first region, the first region including an end of the paper passing region in a paper width direction, and a controller. The controller is configured to lower a set temperature of the heater in response to a determination that (a) a determination condition is satisfied, the determination condition relating to a start of the conveyance of the printing medium to the fixing device by the conveyor and (b) the temperature detected by the temperature sensor is higher than a threshold temperature.