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US 5,216,453 AGranted
Electrophotographic printer
AssigneeOki Electric Industry Co., Ltd.
InventorShinichi Itoh
Life of this patent
Estimating the term…
Abstract
In an electrophotographic printer, electrostatic latent images are formed on a surface of a photosensitive drum, toner images corresponding to the electrostatic latent images are formed on a toner image bearing belt, which is brought to confront a recording paper on a platen. When part of the toner image forming belt on which toner images for a one complete line is formed confronts the recording paper, a transfer member is moved laterally in the spacing direction while pressing the toner image bearing belt against the recording paper on the platen. The transferred toner image can be simultaneously fixed by application of heat from a heating member provided in the transfer member or in the platen.
Claims34
An electrophotographic printer comprising:
- (a) a platen having a surface;
- (b) paper feed means for feeding a recording paper having a surface over said platen along the surface of said platen in a first direction;
- (c) a toner image bearing member extending along the surface of the recording paper on said platen, said toner image bearing member extending in a second direction at an angle with respect to said first direction;
- (d) driving means for forming a toner image on part of said toner image bearing member, and for moving said part of the toner image bearing member on which the toner image has been formed in the second direction to a position confronting the recording paper on said platen, and for halting movement of the toner image bearing member when said part of the toner image bearing member has reached said position;
- (e) a transfer member disposed opposite to the recording paper with respect to the toner image bearing member;
- (f) space-driving means for moving said transfer member in said second direction after said part of said toner image bearing member has reached the position confronting the recording paper;
- (g) actuator means for causing the transfer member to press said toner image bearing member against the recording paper over said platen while said space driving means moves said transfer member in said second direction, thereby transferring the toner image from the toner image bearing member to the recording paper, wherein said driving means for forming a toner image on said toner image bearing member comprises:
- an electrostatic latent image carrier having a surface;
- means for forming an electrostatic latent image on said surface of said electrostatic latent image carrier;
- said toner image bearing member contacting part of said surface of said electrostatic latent image carrier on which the electrostatic latent image has been formed;
- and
- developing means disposed to face the toner image bearing member and passing over said electrostatic latent image carrier for developing the toner image on said toner image bearing member.
9 more elements
An electrophotographic printer comprising:
- (a) a platen having a surface;
- (b) paper feed means for feeding a recording paper having a surface over said platen along the surface of said platen in a first direction;
- (c) a toner image bearing member extending along the surface of the recording paper on said platen, said toner image bearing member extending in a second direction at an angle with respect to said first direction;
- (d) driving means for forming a toner image on part of said toner image bearing member, and for moving said part of the toner image bearing member on which the toner image has been formed in the second direction to a position confronting the recording paper on said platen, and for halting movement of the toner image bearing member when said part of the toner image bearing member has reached said position;
- (e) a transfer member disposed opposite to the recording paper with respect to the toner image bearing member;
- (f) space-driving means for moving said transfer member in said second direction after said part of said toner image bearing member has reached the position confronting the recording paper;
- (g) actuator means for causing the transfer member to press said toner image bearing member against the recording paper over said platen while said space driving means moves said transfer member in said second direction, thereby transferring the toner image from the toner image bearing member to the recording paper, wherein said transfer member comprises a transfer roller having an axis parallel to the surface of said platen and at an angle to said second direction when said actuator means causes said transfer roller to press said toner image bearing member against said recording paper.
4 more elements
An electrophotographic printer comprising:
- (a) a platen having a surface;
- (b) paper feed means for feeding a recording paper having a surface over said platen along the surface of said platen in a first direction;
- (c) a toner image bearing member extending along the surface of the recording paper on said platen, said toner image bearing member extending in a second direction at an angle with respect to said first direction;
- (d) driving means for forming a toner image on part of said toner image bearing member, and for moving said part of the toner image bearing member on which the toner image has been formed in the second direction to a position confronting the recording paper on said platen, and for halting movement of the toner image bearing member when said part of the toner image bearing member has reached said position;
- (e) a transfer member disposed opposite to the recording paper with respect to the toner image bearing member;
- (f) space-driving means for moving said transfer member in said second direction after said part of said toner image bearing member has reached the position confronting the recording paper;
- (g) actuator means for causing the transfer member to press said toner image bering member against the recording paper over said platen while said space driving means moved said transfer member in said second direction, thereby transferring the toner image from the toner image bearing member to the recording paper;
- and
- (h) a heating means disposed in said platen for heating the toner, thereby fixing the toner image to the recording paper.
6 more elements
An electrophotographic printer comprising:
- (a) a platen having a surface;
- (b) paper feed means for feeding a recording paper having a surface over said platen along the surface of said platen in a first direction;
- (c) a toner image bearing member extending along the surface of the recording paper on said platen, said toner image bearing member extending in a second direction at an angle with respect to said first direction;
- (d) driving means for forming a toner image on part of said toner image bearing member, and for moving said part of the toner image bearing member on which the toner image has been formed in the second direction to a position confronting the recording paper on said platen, and for halting movement of the toner image bearing member when said part of the toner image bearing member has reached said position;
- (e) a transfer member disposed opposite to the recording paper with respect to the toner image bearing member;
- (f) space-driving means for moving said transfer member in said second direction after said part of said toner image bearing member has reached the position confronting the recording paper;
- (g) actuator means for causing the transfer member to press said toner image bearing member against the recording paper over said platen while said space driving means moves said transfer member in said second direction, thereby transferring the toner image from the toner image bearing member to the recording paper;
- and
- (h) a photosensitive drum.
6 more elements
Dependencies are inferred from the claim text.