Image forming apparatus configured to control rotational speed of pressure roller using temperature of heat unit and parameter,申请号US201514920946-传众专利搜索

Image forming apparatus configured to control rotational speed of pressure roller using temperature of heat unit and parameter

申请公布号：US9483002(B2)

申请号：US201514920946

申请日期：2015.10.23

申请公布日期：2016.11.01

申请人：

Brother Kogyo Kabushiki Kaisha

发明人：Hazeyama Tomoaki;Maruyama Yasuhiro

分类号：G03G15/20

主分类号：G03G15/20

代理机构：

Banner & Witcoff, Ltd.

代理人：Banner & Witcoff, Ltd.

地址：Nagoya-shi, Aichi-ken JP

摘要：An image forming apparatus includes a heat unit, a pressure roller, a temperature sensor, and a controller. The heat unit includes a heater and a heated member configured to be heated by the heater. The pressure roller is configured to rotate at a rotational speed while being in contact with the heated member upon receiving a driving force. The temperature sensor is configured to detect a temperature of the heat unit. The controller is configured to control the rotational speed of the pressure roller on a basis of: the temperature detected by the temperature sensor; and a parameter that causes temperature of the pressure roller to change.

主权项：1. An image forming apparatus comprising: a heat unit including a heater and a heated member configured to be heated by the heater; a pressure roller configured to rotate at a rotational speed while being in contact with the heated member upon receiving a driving force; a temperature sensor configured to detect a temperature of the heat unit; and a controller configured to: estimate a temperature of the pressure roller based on: the temperature detected by the temperature sensor; and a parameter that causes temperature of the pressure roller to change;determine a target rotational speed of the pressure roller based on the estimated-temperature of the pressure roller;repeatedly update the estimated-temperature of the pressure roller, the updated estimated-temperature being determined by adding a change amount in temperature to a penultimate estimated-temperature of the pressure roller, the change amount in temperature being calculated using a first term, the first term being determined by multiplying a difference between a nip temperature and the penultimate estimated-temperature by a first coefficient, the nip temperature being a temperature at a nip portion formed between the pressure roller and the heated member, the first coefficient being set to a different value depending on whether the pressure roller is rotating or not, the parameter including a status whether the pressure roller is rotating or not; andcontrol the rotational speed of the pressure roller to be brought into coincidence with the target rotational speed.