Color electrophotographic apparatus

A color electrophotographic apparatus which comprises:

• a plurality of movable image forming means each provided with a rotatable electrostatic latent image holding member and a developing means each having toner of different color, and capable of forming a toner image of different color on said electrostatic latent image holding member,
• a transfer and transport means capable of supporting thereon a transfer material so as to reciprocatingly move said transfer material, and provided with a transfer means for transferring the toner image on said electrostatic latent image holding member onto the transfer material at a single transfer position,
• an exposure means for effecting image exposure at a single exposure position corresponding to said transfer position,
• a displacing means for successively displacing each of said plurality of image forming means to the vicinity of an image forming position corresponding to said exposure position and also, to said transfer position, and
• a positioning means for positioning said image forming means which is in the vicinity of said image forming position by displacing said image forming means to said image forming position, whereby the toner images of different colors are overlapped on the transfer material, with positions thereof aligned, thereby to effect the color image formation.

A color electrophotographic apparatus which comprises:

• a plurality of movable image forming means each provided with a rotatable electrostatic latent image holding member and a developing means each having toner of different color, and capable of forming a toner image of different color on said electrostatic latent image holding member,
• a supporting means for supporting said plurality of image forming means,
• a transfer means for transferring the toner image on said electrostatic latent image holding member onto the transfer material at a single transfer position,
• an exposure means for effecting image exposure at a single exposure position corresponding to said transfer position,
• a displacing means for displacing said support means so that each of said plurality of image forming means successively approaches an image forming position corresponding to said exposure position and also, to said transfer position, and
• a positioning means for positioning said image forming means which has approached said image forming position, whereby the toner images of different colors are overlapped on the transfer material, with positions thereof aligned, thereby to effect the color image formation.

A color electrophotographic apparatus which comprises:

• a plurality of movable image forming means each provided with a rotatable electrostatic latent image holding member and a developing means each having toner of different color, and capable of forming a toner image of different color on said electrostatic latent image holding member,
• a transfer and transport means capable of supporting thereon a transfer material so as to reciprocatingly move said transfer material, and provided with at transfer means for transferring the toner image on said electrostatic latent image holding member onto the transfer material at a single transfer position,
• a flywheel means which can be selectively connected to and spaced from said transfer and transport means,
• an exposure means for effecting image exposure at a single exposure position corresponding to said transfer position,
• a displacing means for successively displacing each of said plurality of image forming means to an image forming position corresponding to said exposure position and also, to said transfer position, whereby the toner images of different colors are overlapped on the transfer material, with positions thereof aligned, thereby to effect the color image formation.

A color electrophotographic apparatus which comprises:

• a plurality of movable image forming means each provided with a rotatable photosensitive member and a developing means each having toner of different color, and capable of forming a toner image of different color on said photosensitive member,
• a transfer and transport means capable of supporting thereon a transfer material for reciprocating motion, and provided with a transfer means for transferring the toner image on said photosensitive member onto the transfer material at the same transfer position,
• an exposure means for effecting image exposure at the same exposure position corresponding to said transfer position, and
• a displacing means for successively displacing each of said plurality of image forming means which are disposed to be aligned side by side in a horizontal direction, to an image forming position corresponding to said exposure position and also, to said transfer position, whereby the toner images of different colors are overlapped on the transfer material, with positions thereof aligned, thereby to effect the color image formation by fixing the color image of said transfer material by a heat fixing means, said plurality of image forming means being disposed in such an order that the image forming means for black is disposed in a position closest to the side of the heat fixing means in the horizontal direction.

A color electrophotographic apparatus which comprises:

• a plurality of movable image forming means each provided with rotatable photosensitive member, a charger for charging said photosensitive member, a developing material hopper for storing toner in different color, a developing means for developing said photosensitive member by said toner, and a cleaner for cleaning said photosensitive member, thereby to form toner images in different colors respectively on said photosensitive members,
• a transfer and transport means capable of supporting thereon a transfer material for reciprocating motion, and provided with a transfer means for transferring the toner image on said photosensitive member onto the transfer material at the same transfer position,
• an exposure means for effecting image exposure at the same exposure position corresponding to said transfer position, and
• a displacing means for successively displacing each of said plurality of image forming means which are disposed to be aligned side by side in a horizontal direction, to an image forming position corresponding to said exposure position and also, to said transfer position, whereby the toner images of different colors are overlapped and transferred on the transfer material for color image formation, thereby to obtain the color images on said transfer material, part of said developing material hopper of said image forming means being arranged to utilize a space at the upper part of said charger of the neighboring image forming means.

A color electrophotographic apparatus which comprises:

• a plurality of movable image forming means each provided with a rotatable photosensitive member, a charger for charging said photosensitive member, a developing material hopper for storing toner in different color, a developing means for developing said photosensitive member by said toner, and a cleaner for cleaning said photosensitive member, thereby to form toner images in different colors respectively on said photosensitive members,
• a transfer and transport means capable of supporting thereon a transfer material for reciprocating motion, and provided with a transfer means for transferring the toner image on said photosensitive member onto the transfer material at the same transfer position,
• an exposure means for effecting image exposure at the same exposure position corresponding to said transfer position, and
• a displacing means for successively displacing each of said plurality of image forming means which are disposed to be aligned side by side in a horizontal direction to an image forming position corresponding to said exposure position and also, to said transfer position, whereby the toner images of different colors are overlapped and transferred on the transfer material for color image formation, thereby to obtain the color images on said transfer material, part of said developing material hopper of said image forming means being arranged to utilize a space at the upper part of said cleaner of the neighboring image forming means.

A color electrophotographic apparatus which comprises:

• a plurality of movable image forming means each provided with a rotatable photosensitive member and a developing means each having toner of different color, and capable of forming a toner image of different color on said photosensitive member,
• a transfer and transport means capable of supporting thereon a transfer material for reciprocating motion, and provided with a transfer means for transferring the toner image on said photosensitive member onto the transfer material at the same transfer position,
• an exposure means for effecting image exposure at the same exposure position corresponding to said transfer position, and
• a displacing means for successively displacing each of said plurality of image forming means which are disposed to be aligned side by side in a horizontal direction, to an image forming position corresponding to said exposure position and also, to said transfer position, whereby the toner images of different colors are overlapped and transferred onto the transfer material, thereby to effect the color image formation for obtaining color image on said transfer material, said neighboring color forming means being each formed into a shape which can be taken out slantwise upwardly.