Back to results
US 7,609,998 B2Granted
Transfer unit and image forming apparatus
AssigneeRicoh Company, Ltd.
InventorsTsutomu Katoh, Mitsuru Takahashi, Kazuchika Saeki, Nobuto Yokokawa, Kazuosa Kuma, Takeshi Fukao
Life of this patent
Estimating the term…
Abstract
A transfer belt is driven by a plurality of supporting rollers. A unit frame supports the supporting rollers in a rotatable manner. At least one of the supporting rollers includes a cylindrical member having a substantially same outer diameter over an entire length thereof. Each end portion of the cylindrical member in a longitudinal direction is supported by the unit frame via a bearing in a rotatable manner.
Claims10
A transfer unit comprising:
- a plurality of supporting rollers;
- a transfer belt that is driven by the supporting rollers;
- a unit frame that supports the supporting rollers in a rotatable manner, wherein
- at least one of the supporting rollers includes a cylindrical member having a substantially same outer diameter over an entire length thereof,
- each end portion of the cylindrical member in a longitudinal direction is supported by the unit frame via a bearing in a rotatable manner, and
- the unit frame includes a through hole communicating with the inside of the cylindrical member.
3 more elements
A transfer unit comprising:
- a plurality of supporting rollers;
- a transfer belt that is driven by the supporting rollers;
- a unit frame that supports the supporting rollers in a rotatable manner, wherein
- at least one of the supporting rollers includes a cylindrical member having a substantially same outer diameter over an entire length thereof,
- each end portion of the cylindrical member in a longitudinal direction is supported by the unit frame via a bearing in a rotatable manner, and
- the unit frame includes a through hole communicating with the inside of the cylindrical member, wherein a harness extends along the through hole and the inside of the cylindrical member.
3 more elements
A transfer unit comprising:
- a plurality of supporting rollers;
- a transfer belt that is driven by the supporting rollers;
- a unit frame that supports the supporting rollers in a rotatable manner, wherein
- at least one of the supporting rollers includes a cylindrical member having a substantially same outer diameter over an entire length thereof,
- each end portion of the cylindrical member in a longitudinal direction is supported by the unit frame via a bearing in a rotatable manner, wherein the cylindrical member includes a rotation detecting unit that detects number of rotations of the cylindrical member per unit time, and
- the rotation detection unit includes a photosensor mounted on a bracket projecting from the unit frame.
3 more elements
An image forming apparatus comprising:
- a transfer unit that includes
- a plurality of supporting rollers,
- a transfer belt that is driven by the supporting rollers,
- a unit frame that supports the supporting rollers in a rotatable manner, wherein
- at least one of the supporting rollers includes a cylindrical member having a substantially same outer diameter over an entire length thereof,
- each end portion of the cylindrical member in a longitudinal direction is supported by the unit frame via a bearing in a rotatable manner,
- the unit frame includes a through hole communicating with the inside of the cylindrical member;
- and
- an image carrier on which a toner image is formed, wherein
- the toner image formed on the image carrier is transferred onto the transfer belt of the transfer unit for a primary transfer, and the toner image on the transfer belt is transferred onto a recording medium for a secondary transfer to obtain a recorded image.
7 more elements
An image forming apparatus comprising:
- a transfer unit that includes
- a plurality of supporting rollers,
- a transfer belt that is driven by the supporting rollers,
- a unit frame that supports the supporting rollers in a rotatable manner, wherein
- at least one of the supporting rollers includes a cylindrical member having a substantially same outer diameter over an entire length thereof,
- each end portion of the cylindrical member in a longitudinal direction is supported by the unit frame via a bearing in a rotatable manner,
- the unit frame includes a through hole communicating with the inside of the cylindrical member;
- and
- an image carrier on which a toner image is formed, wherein
- the toner image formed on the image carrier is transferred onto a recording medium carried by the transfer belt to obtain a recorded image.
7 more elements
Dependencies are inferred from the claim text.