Canon Kabushiki Kaisha

Jun Nakagaki

Jiro Shirakata

Dai Kanai

Yoritsugu Maeda

Jun Nakazato

Yukihiro Fujiwara

Satoshi Atarashi

Yuhei Takei

An image forming apparatus includes: a first unit including an image forming unit for forming an image on a recording material; a first supporting portion for supporting the first unit at three points consisting of a first foot provided adjacent to a side of a bottom of the first unit, a second foot, and a third foot provided adjacent to an opposite side of the bottom; a second unit provided below the first unit; a second supporting portion, provided at a bottom of the second unit, for supporting the second unit by at least four foots; and a connecting portion for connecting the first unit and the second unit with respect to an up-down direction so that the opposite side of the bottom of the first unit is inclined depending on inclination of the side of the bottom of the first unit with respect to a horizontal surface.

Image forming apparatus

A belt driving apparatus is configured so as to satisfy a relationship &#x3bc;(2T sin(&#x3b8;/2)+f)&#x3c;&#x3bc;(2T sin(&#x3b8;/2)+f), wherein &#x3bc;is a dynamic friction coefficient between the supporting roller and the endless belt, &#x3bc;is a dynamic friction coefficient between the steering roller and the endless belt, &#x3b8;is a winding angle of the endless belt with respect to the supporting roller, &#x3b8;is a winding angle of the endless belt with respect to the steering roller, fis the first external force applied to the supporting roller through the endless belt, fis the second external force applied to the steering roller through the endless, and T is a tension force applied to the endless belt by the tension roller.

Belt driving apparatus and image forming apparatus

An image forming apparatus includes a rotatable belt member; a stretching roller for stretching the belt member; a plurality of line like marks which are arranged in a rotational direction of the belt member and are formed stepwisely on a surface of the belt member, the marks being tilted from a rotational axis direction of the belt member at least at end portions thereof on sides close to an end surface of the belt member; and control means for controlling rotation of the belt member on the basis of a result of detection of the marks.

Belt driving apparatus having belt with detection marks

An image-forming apparatus includes an image-bearing member configured to bear an image, a transfer belt to which the image on the image-bearing member is transferred and configured to transfer the image onto a sheet, a first drive unit configured to drive the image-bearing member to rotate, a second drive unit configured to drive the transfer belt to rotate via a speed reduction member interposed therebetween, a detection unit configured to detect a circumferential speed of the transfer belt, and a control unit configured to control the first drive unit in accordance with the circumferential speed of the transfer belt detected by the detection unit.

Image-forming apparatus

A rotary member apparatus includes a main drive unit configured to apply a driving torque to a photosensitive drum through a drive transfer unit, a torque limiter configured to limit the driving torque transmitted from the main drive unit to the photosensitive drum, a compensation drive unit configured to apply a torque for adjusting an angular velocity of the photosensitive drum, an encoder configured to detect the angular velocity of the photosensitive drum, and a compensation drive controller configured to control the torque applied by the compensation drive unit on the basis of a detection result obtained by the encoder.

Rotary member driving apparatus

A belt cover is configured to approach an intermediate transfer belt when an intermediate transfer portion retracts from a photosensitive drum. This allows the space required for the retraction of the belt cover to be made smaller when the intermediate transfer portion retracts from the photosensitive drum. Therefore, a color printer body can be made more compact.

Image conveyance unit, intermediate transfer unit, electrostatic transfer unit, and image forming apparatus

In an image heating apparatus including a rotatable heating roller to heat an image on a recording material at a nip part, and a cooling unit to cool the rotatable heating roller, the cooling unit includes a pipe that forms a cooling loop for circulating cooling fluid, and a heat transmission member provided slidably and rotatably around the pipe.

Growing community of inventors

Abiko, Japan

Jun Nakagaki