Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorMitsugu Inomata
Life of this patent
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Abstract
The present invention relates to an image forming apparatus for forming an image on a recording medium, comprising an image bearing member, plural development means for effecting image development by acting on said image bearing member, and drive means for enabling drive force transmission to selected one among said plural development means by rotation in a direction, and driving said selected development means by rotation in a direction opposite to the above-mentioned direction.
Claims22
An image forming apparatus for forming an image on a recording medium, comprising:
- an image bearing member;
- plural development means for effecting image development by acting on said image bearing member;
- and
- drive means for enabling drive force transmission to a selected one of said plural development means by rotation in a first direction, and driving said selected development means by rotation in a second direction opposite to the first direction,
- wherein said image bearing member is an electrophotographic photosensitive member, and said electrophotographic photosensitive member and said plural development means are integrally formed as a process cartridge which is detachably loaded in the main body of the image forming apparatus.
An image forming apparatus for forming an image on a recording medium, comprising:
- an image bearing member;
- plural development means for effecting image development by acting on said image bearing member;
- and
- drive means for enabling drive force transmission to a selected one of said plural development means by rotation in a first direction, and driving said selected development means by rotation in a second direction opposite to the first direction;
- wherein said image bearing member and development means for yellow, magenta and cyan colors, among said plural development means, are integrally formed as a process cartridge which is detachably mounted in the main body of the image forming apparatus.
An image forming apparatus for forming an image on a recording medium, comprising:
- an image bearing member;
- plural development means for effecting image development by acting on said image bearing member;
- a driving source;
- and
- switch means for connecting a drive transmission path between the selected one of said plural development means and said driving source in order to transmit the driving force from said driving source;
- wherein the driving force of said driving source serves to drive said switch means and said development means;
- and
- wherein said image bearing member is an electrophotographic photosensitive member, and said electrophotographic photosensitive member and said plural development means are integrally formed as a process cartridge which is detachably loaded in the main body of the image forming apparatus.
An image forming apparatus for forming an image on a recording medium, comprising:
- an image bearing member;
- plural development means for effecting image development by acting on said image bearing member;
- a driving source;
- and
- switch means for connecting a drive transmission path between the selected one of said plural development means and said driving source, in order to transmit the driving force from said driving source;
- wherein the driving force of said driving source serves to drive said switch means and said development means;
- and
- wherein said image bearing member and development means for yellow, magenta and cyan colors, among said plural development means, are integrally formed as a process cartridge which is detachably loaded in the main body of the image forming apparatus.
An image forming apparatus for forming an image on a recording medium, comprising:
- an image bearing member;
- plural development means for effecting image development by acting on said image bearing member;
- a driving source;
- switching means for connecting a drive transmission path between selected one among said plural development means and said driving source;
- and
- discrimination means for discriminating defective connection in the drive transmission path between said selected development means and said driving source.
An image forming apparatus, comprising:
- an image bearing member;
- plural developing means for supplying developing agent to said image bearing member, each of said plural developing means having a developing agent bearing member;
- a drive source for supplying a driving force for driving said plural developing agent bearing members;
- drive force transmitting means for transmitting the driving force to one of said plural developing agent bearing members;
- and
- switch means for switching which of said plural developing agent bearing members is to be driven by said drive force transmitting means;
- wherein said switch means is adapted to be driven by the drive force when the drive force is not transmitted from said drive source to said plural developing agent bearing members.
A multi-color image forming apparatus provided with a process cartridge which includes at least an image bearing member and plural development means and is detachably loaded in the main body of said apparatus, and driving force transmission switching means for mechanically switching the development means used for image development by the switching of transmission of driving force to the development means in said process cartridge, comprising:
- detection means for detecting the driven or undriven state of a driven member of the development means by said drive force transmission switching means.
Dependencies are inferred from the claim text.