Device and method for controlling fixing temperature in image forming apparatus
AssigneeSamsung Electronics Co., Ltd.
InventorKyung-Shig Chung
Life of this patent
Estimating the term…
Abstract
A fixing temperature controlling process in an image forming apparatus. The resistance of a transfer roller is detected upon request of a fixing temperature control. It is determined which of fixing environment conditions set according to changes in fixing performance caused by environmental change the resistance belongs to. An optimal fixing temperature is detected for the determined fixing environment condition and the temperature of a fixer is controlled to the detected optimal fixing temperature.
Claims18
A fixing temperature controlling process in an image forming apparatus, comprising the steps of:
- detecting the resistance of a transfer roller upon request of a fixing temperature control;
- determining which of several fixing environment conditions, set according to changes in fixing performance caused by environmental change, the resistance belongs to;
- and
- detecting an optimal fixing temperature for the determined fixing environment condition and controlling the temperature of a fixer to the detected optimal fixing temperature.
A fixing temperature controlling process in an image forming apparatus having a transfer roller and a fixing roller and fixing and transfer environment conditions separately classified according to transfer resistance values, comprising the steps of:
- detecting the transfer resistance of the transfer roller;
- determining a fixing environment condition based on the detected transfer resistance;
- and
- controlling the fixer roller to a fixing temperature corresponding to the determined fixing environment condition.
A fixing temperature controlling device in an image forming apparatus having a transfer roller and a fixing roller, comprising:
- a transfer resistance detector for detecting the transfer resistance of the transfer roller;
- and
- an engine controller for setting fixing environment conditions and transfer environment conditions separately according to transfer resistance values, determining a fixing environment condition based on the detected transfer resistance, and controlling the fixing roller to a fixing temperature corresponding to the determined fixing environment condition.
A fixing temperature controlling device in an image forming apparatus having a transfer roller and a fixing roller, comprising:
- a memory for storing separate optimal transfer voltages and fixing temperatures for fixing and transfer environment conditions independently set according to transfer resistance values of the transfer roller, wherein the fixing and transfer environment conditions are high temperature-high humidity, room temperature-room humidity, and low temperature-low humidity;
- a transfer resistance detector for detecting the transfer resistance of the transfer roller;
- and
- an engine controller for reading an optimal fixing temperature from the memory based on the detected transfer resistance and controlling the fixer roller to the fixing temperature.
A fixing temperature controlling device in an image forming apparatus having a transfer roller and a fixing roller, comprising:
- a memory for storing a plurality of transfer resistance values, first, second and third transfer voltages corresponding to respective ranges of said transfer resistance values, and first, second and third fixing temperatures corresponding to different respective ranges of said transfer resistance values;
- a transfer resistance detector for detecting the transfer resistance value of the transfer roller;
- and
- an engine controller for controlling the fixer roller to the fixing temperature corresponding to the detected transfer resistance value, and for applying to the transfer roller the transfer voltage corresponding to said detected transfer resistance value.
Dependencies are inferred from the claim text.