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US 5,333,038 AGranted
Image forming apparatus for controlling a size or a color tone of a toner image
AssigneeKonica Corporation
InventorsYoshimi Mizoguchi, Hiroshi Ishii, Kiyoshi Kimura, Masakazu Fukuchi, Makoto Takeda
Life of this patent
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Abstract
In a toner image forming apparatus capable of changing the fixing condition of a fixing device to fix a toner image on a recording sheet, there is provided a control device to change at least one of the charging condition of a charging device, the exposure condition of the exposing device and the developing condition of the developing device to change the toner amount in the toner image in accordance with the change in the fixing condition.
Claims21
An apparatus for forming an image on a transfer sheet, comprising:
- image carrying means having an imaging surface on which an electrostatic latent image is formed;
- charging means for charging in the imaging surface to an electrical potential;
- exposing means for exposing the imaging surface with a image exposure beam which is modulated by an image signal so as to form a dot-shaped electrostatic latent image on the imaging surface;
- developing means for developing the latent image to form a dot-shaped toner image;
- transferring means for transferring the dot-shaped toner image onto the transfer sheet;
- fixing means, responsive to a plurality of fixing conditions, for fixing the dot-shaped toner image on the transfer sheet;
- first control means for changing at least one of the plurality of fixing conditions to which the fixing means is responsive;
- and
- second control means for controlling at least one of a charging condition of the charging means, an exposure condition of the exposing means and a developing condition of the developing means to change a toner amount in the dot-shaped toner image on the imaging surface in accordance with the change of the at least one of the plurality of fixing conditions by the first control means so that a change in a size of the dot-shaped toner image to be fixed is prevented regardless of the change in the at least one of the plurality of fixing conditions by the first control means.
6 more elements
An apparatus for forming an image on a transfer sheet, comprising:
- image carrying means having an imaging surface on which an electrostatic latent image is formed;
- means for charging the imaging surface to an electrical potential;
- means for exposing the imaging surface with an image exposure beam which is modulated by an image signal so as to form a dot-shaped electrostatic latent image on the imaging surface;
- means for developing the latent image to form a toner image;
- means for transferring the toner image onto the transfer sheet;
- means for fixing the toner image on the transfer sheet;
- first control means for changing at least one of a plurality of fixing conditions of the fixing means;
- means for discriminating whether the dot-shaped image is one of an isolated dot and an edge dot;
- and
- second control means for controlling the exposing means to change at least one of a dot size and a dot position of the dot-shaped image discriminated by the discriminating means to be one of the isolated dot and the edge dot for changing a toner amount in the dot-shaped toner image on the imaging surface in accordance with the change in the at least one of the plurality of fixing conditions by the first control means.
7 more elements
An apparatus for forming a color image on a transfer sheet, comprising:
- image carrying means having an imaging surface on which an electrostatic latent image is formed;
- charging means for charging the imaging surface to an electrical potential;
- exposing means for exposing the imaging surface with an image exposure beam which is modulated by an image signal so as to form a dot-shaped electrostatic latent image on the imaging surface;
- a plurality of different color developing means for forming a dot-shaped color toner image;
- transferring means for transferring the dot-shaped color toner image onto the transfer sheet;
- fixing means responsive to a plurality of fixing conditions for fixing the dot-shaped color toner image on the transfer sheet;
- first control means for changing at least one of the fixing conditions of the fixing means;
- and
- second control means for controlling at least one of a charging condition of the charging means, an exposure condition of the exposing means and a developing condition of at least one of the plurality of developing means to change a toner amount in the dot-shaped color toner image on the imaging surface in accordance with the change of the at least one fixing condition by the first control means so that a change in one of a size and a color tone of the dot-shaped color toner image to be fixed by the fixing means is prevented regardless of the change in the at least one of the fixing conditions by the first control means.
6 more elements
An apparatus for forming a color image on a transfer sheet, comprising:
- image carrying means having an imaging surface on which an electrostatic latent image is formed;
- means for charging the imaging surface to an electrical potential;
- means for exposing the imaging surface with an image exposure beam which is modulated by an image signal so as to form a dot-shaped electrostatic latent image on the imaging surface;
- a plurality of developing means differing in color to form a color toner image;
- means for transferring the toner image onto the transfer sheet;
- means for fixing the toner image on the transfer sheet;
- first control means for changing at least one of a plurality of fixing conditions of the fixing means;
- means for discriminating whether or not the dot-shaped image is one of an isolated dot and an edge dot;
- and
- second control means for controlling the exposing means to change at least one of a dot size and a dot position of the dot-shaped image discriminated as one of the isolated dot and the edge dot to change a toner amount in the dot-shaped toner image on the imaging surface in accordance with the change in the at least one of the plurality of fixing conditions.
7 more elements
Dependencies are inferred from the claim text.