Image forming apparatus and fixing device

An Image forming apparatus comprising:

• a photosensitive member which holds an electrostatic latent image;
• an exposure device which forms an electrostatic latent image on the photosensitive member;
• a developing device which develops the electrostatic image on the photosensitive member with a developer;
• an image forming section which forms a developer image on a transfer member, and
• a fixing device which fixes the developer image to the transfer member by heating the developer image formed and transfer member, wherein the fixing device generates heat by the flow of a high-frequency current through a coil provided close to an endless member having a metal layer made of a conductive material, and the high-frequency current is controlled in accordance with one of a plurality of power control patterns when the image forming apparatus is in one of an initialize mode, a pro-run mode, an image formation mode and a standby mode.

An image forming apparatus comprising:

• a photosensitive member which holds an electrostatic latent image;
• a rotating device which rotates the photosensitive member;
• an exposure device which forms an electrostatic latent image on the photosensitive member;
• an image forming device which supplies a developer to the electrostatic latent image on the photosensitive member, and forms a developer image on a transfer member;
• and
• a fixing device which fixes the developer image to the transfer member,
• wherein the fixing device is controlled by a plurality of electric power control patterns corresponding to electric power amounts which can be supplied under predetermined conditions, respectively, and the electric power control patterns are used to change an electric power supply within a range of a difference between a maximum electric power which can be input and a sum total of electric power amounts respectively consumed by the rotating device, the exposure device, the image forming device and other components which can be simultaneously operated in accordance with time periods defined by start times of operations sequentially conducted by the rotating device, exposure device, image forming device and other components.

An image forming apparatus comprising:

• a photosensitive means for holding an electrostatic latent image;
• an exposure means for forming an electrostatic latent image on the photosensitive means;
• a developing means for developing the electrostatic image on the photosensitive means with a developer;
• an image forming means for fanning a developer image on a transfer means;
• and
• a fixing means for fixing the developer image to the transfer means by heating the developer image and transfer means, wherein the fixing means generates heat by the flow of a high-frequency current through a coil provided close to an endless member having a metal layer made of a conductive material, and the fixing means is controlled in accordance with one of a plurality of power control patterns when the image fanning apparatus is in one of an initialize mode, a pre-run mode, an image formation mode and a standby mode.

An image forming apparatus comprising:

• a photosensitive means for holding an electrostatic latent image,
• a rotating means for rotating the photosensitive means;
• an exposure means for forming an electrostatic latent image on the photosensitive means;
• an image forming means for supplying a developer to the electrostatic latent image on the photosensitive means, and for fanning a developer image on a transfer means;
• and
• a fixing means for fixing the developer image to the transfer means, wherein the fixing means is controlled by a plurality of electric power control patterns corresponding to electric power amounts which can be supplied under predetermined conditions, respectively, and the electric power control patterns are used to change an electric power supply within a range of a difference between a maximum electric power which can be input and a sum total of electric power amounts respectively consumed by the rotating means, the exposure means, the image forming means and other means which can be simultaneously operated in accordance with time periods defined by start times of operations sequentially conducted by the rotating means, exposure means, image forming means and other means.