Abstract: An image forming apparatus includes a replaceable toner cartridge which, in turn, includes a magnetic chip records identifying information about the type of toner cartridge. The magnetic chip interacts with an identifying unit, to determine the compatibility of the toner cartridge. The magnetic chip is made from magnetic powder and non-magnetic powder compounded at an appropriate ratio at which a predetermined magnetic resistance is maintained. The identifying unit includes a magnetic sensor which detects magnetic resistance without contacting the magnetic chip. A microcomputer verifies whether the output detected by the magnetic sensor is greater than or equal to a predetermined level and within a range of criterion, to determine whether the toner cartridge is compatible with the image forming apparatus.

Abstract: A center thermistor 13 associated with a center heater 11 within a heat roller 10 and a side thermistor 14 associated with a side heater 12 within the heat roller 10 are arranged in phase in a circumferential direction of the heat roller 10. In standby state, in a period immediately after the start of printing and in a period immediately after the end of printing, a control temperature based on a detection temperature of the thermistor 13 or 14 has a value that is obtained by making correction to a reference control-target value.

Abstract: An image forming apparatus includes a replaceable toner cartridge which, in turn, includes a magnetic chip which records identifying information about the type of toner cartridge. The magnetic chip interacts with an identifying unit, to determine the compatibility of the toner cartridge. The magnetic chip is made from magnetic powder and non-magnetic powder compounded at an appropriate ratio at which a predetermined magnetic resistance is maintained. The identifying unit includes a magnetic sensor which detects magnetic resistance without contacting the magnetic chip. A microcomputer verifies whether the output detected by the magnetic sensor is greater than or equal to a predetermined level and within a range of criterion, to determine whether the toner cartridge is compatible with the image forming apparatus.

Abstract: An image forming apparatus includes a replaceable toner cartridge which, in turn, includes a magnetic chip which records identifying information about the type of toner cartridge. The magnetic chip interacts with an identifying unit, to determine the compatibility of the toner cartridge. The magnetic chip is made from magnetic powder and non-magnetic powder compounded at an appropriate ratio at which a predetermined magnetic resistance is maintained. The identifying unit includes a magnetic sensor which detects magnetic resistance without contacting the magnetic chip. A microcomputer verifies whether the output detected by the magnetic sensor is greater than or equal to a predetermined level and within a range of criterion, to determine whether the toner cartridge is compatible with the image forming apparatus.

Abstract: An image forming apparatus 1 according to the present invention is provided with a replaceable toner cartridge 16. The toner cartridge 16 is provided with a magnetic chip 18 which records identifying information about the type and the like of said toner cartridge as a difference in magnetic resistance, and an identifying means 21 which identifies the type and the like of the toner cartridge 16 by means of the output magnetic resistance detected by the magnetic chip 18 so as to determine the compatibility of the toner cartridge. The magnetic chip 18 is made from magnetic powder and non-magnetic powder compounded at an appropriate ratio at which a predetermined magnetic resistance is maintained.

Abstract: An initial adjustment system of a copying machine for forming an image of an original onto an image forming media, which includes a detector for detecting a concentration of a toner used in the copying machine to provide a detection result, and a microcomputer for performing an adjustment of the toner concentration in accordance with the detection result. The adjustment by the microcomputer is performed in accordance with a predetermined adjustment sequence when the image forming apparatus is to be adjusted at an installation place. A reference value for the desired toner concentration is adjusted a number of times when the copier is initially installed. The cleaner blade is lubricated as part of the installation.