US 2014/0270827 A1 · IMAGE FORMING APPARATUS

Abstract

An image forming apparatus includes an image carrier, a rotation-position detector, a development device, a transfer unit, a density sensor, and an image-forming-condition determination unit. The density sensor senses a density of a toner image on a transfer body. The image-forming-condition determination unit forms an image pattern, acquires periodical density variation information sensed by the density sensor and detection information of the rotation-position detector, and determines an image forming condition based on the periodical density variation information and the detection information acquired. The image carrier and the transfer body are different in linear velocity in an image formation in which the toner image is transferred to a recording medium. The image carrier and the transfer body are controlled to be equal in linear velocity in an information acquisition in which the image-forming-condition determination unit acquires the periodical density variation information and the detection information.

Claims10

Dependent claims

An image forming apparatus, comprising:

a rotary image carrier having a surface to carry an electrostatic latent image formed thereon;
a rotation-position detector to detect a rotation position of the image carrier;
a development device to develop the electrostatic latent image to form a toner image;
a transfer unit to transfer to a transfer body the toner image developed by the development device;
a density sensor to sense a density of the toner image on the transfer body;
and
an image-forming-condition determination unit to form an image pattern, acquire periodical density variation information sensed by the density sensor and detection information of the rotation-position detector, and determine an image forming condition based on the periodical density variation information and the detection information acquired,
wherein, the image carrier and the transfer body are different in linear velocity in an image formation in which the toner image is transferred to a recording medium,
wherein the image carrier and the transfer body are controlled to be equal in linear velocity in an information acquisition in which the image-forming-condition determination unit acquires the periodical density variation information and the detection information.

6 more elements

An image forming apparatus, comprising:

a rotary image carrier having a surface to carry an electrostatic latent image formed thereon;
a rotation-position detector to detect a rotation position of the image carrier;
a development device to develop the electrostatic latent image to form a toner image;
a first transfer unit to transfer to a first transfer body the toner image developed by the development device;
a second transfer unit to transfer the toner image on the first transfer body to a second transfer body;
a density sensor to sense a density of the toner image on the second transfer body;
and
an image-forming-condition determination unit to form an image pattern, acquire periodical density variation information sensed by the density sensor and detection information of the rotation-position detector, and determine an image forming condition based on the periodical density variation information and the detection information acquired,
wherein the image carrier, the first transfer body, and the second transfer body are different in linear velocity in image formation in which the toner image is transferred to a recording medium, and
wherein the image carrier, the first transfer body, and the second transfer body are controlled to be equal in linear velocity in information acquisition in which the image-forming-condition determination unit acquires the periodical density variation information and the detection information.

7 more elements

An image forming apparatus, comprising:

a rotary image carrier having a surface to carry an electrostatic latent image formed thereon;
a developer carrier to carry a developer on a rotary surface thereof to develop the electrostatic latent image and form a toner image;
a rotation-position detector to detect a rotation position of the developer carrier;
a transfer unit to transfer to a transfer body the toner image;
a density sensor to sense a density of the toner image on the transfer body;
and
an image-forming-condition determination unit to form an image pattern, acquire periodical density variation information sensed by the density sensor and detection information of the rotation-position detector, and determine an image forming condition based on the periodical density variation information and the detection information acquired,
wherein the image carrier and the transfer body are different in linear velocity in image formation in which the toner image is transferred to a recording medium, and
wherein the image carrier and the transfer body are controlled to be equal in linear velocity in information acquisition in which the image-forming-condition determination unit acquires the periodical density variation information and the detection information.

6 more elements

Dependencies are inferred from the claim text.

Image forming apparatus

Life of this patent

Image forming apparatus

Life of this patent

Abstract

Claims10