Canon Kabushiki Kaisha

Shinji Hanada

Koji Masuda

Takayuki Ishihara

Hisaaki Senba

Matsuomi Nishimura

Kazuki Tanaka

A heating apparatus includes a heater, the heater including a main resistance layer and a subordinate resistance layer branched from said main resistance layer, which extend in a direction crossing with a movement direction of a recording material and which are supplied with electric power; a selector for selecting a resistance layer for supplying electric power; and a controller for controlling an effective voltage applied to said heater in accordance with selected resistance layer.

Heating apparatus having heater with branch

An image fixing apparatus includes a heater; a film movable in contact with the heater at one side thereof and in contact with a recording material at the other side thereof, wherein a visualized image on the recording material is heated and fixed by heat from the heater through the film; the heater including a heat generating layer extending in a direction crossing a movement direction of the film, for producing the heat by the application of a voltage between its longitudinal opposite ends; an electric path branched out of an image fixing part of the heat generating layer; and a selector for selecting the electric path in accordance with a size of the recording material.

Movable film fixing device with heater control responsive to selected

An electrophotograpic apparatus and an electrophotographic process wherein when a developer is to be deposited on such an area of a latent image as has been exposed to light, by a reverse development operation, the non-image-forming area existing before and after the image forming area is exposed to light with the aid of an exposure lamp, whereby the potential of the non-image-forming area is lowered. By this, the possibility of variation of the potential which may otherwise be caused by continuous image forming operation and variation in the ambient conditions can be prevented. Futher, by applying a bias voltage for preventing deposition of the developer in the non-image forming area which is substantially free from potential variation, the developer is prevented from being deposited, irrespective of the variation in the ambient conditions.

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Yokohama, Japan

Shinji Hanada