Canon Kabushiki Kaisha

Naohiro Obata

An image forming apparatus, which forms an image at an image forming interval and feeding timing corresponding to a predetermined recording material size, includes a control unit (a controller unit and an engine control unit) for controlling the feeding timing to be earlier, when the size of a recording material detected by a detection unit (the engine control unit and an registration sensor) is smaller than the predetermined recording material size.

Image forming apparatus to control recording material feeding based on when an image is formed on an image bearing member

A setting unit sets a high-voltage set value. A first generation unit generates a high voltage based on the set value set by the setting unit and a first reference voltage supplied from a supply unit. A second generation unit generates a second reference voltage by being supplied with the first reference voltage from the supply unit. A comparing unit compares the first reference voltage with the second reference voltage. A storage unit stores a comparison result that has been obtained in advance by the comparing unit comparing the first reference voltage with the second reference voltage. A correction unit corrects the high-voltage set value based on a comparison result that is obtained by the comparing unit when the image forming apparatus is in use and the comparison result that has been obtained in advance and is stored in the storage unit.

Power supply apparatus for use in image forming apparatus

In an image forming apparatus, a discrimination unit discriminates the type of printing medium conveyed to an image forming unit. A comparator compares the type of a printing medium that has been designated and the type of a printing medium that has been discriminated. A setting unit sets a second image forming condition in the image forming unit if it has been determined not to add identification information to image information in accordance with the type of printing medium designated and, moreover, the type of printing medium designated and the type of printing medium discriminated by the discrimination unit do not match. The second image forming condition is different from a first image forming condition that conforms to the type of printing medium discriminated by the discrimination unit.

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Tokyo, Japan

Naohiro Obata