Image forming apparatus and transfer belt

Abstract

In an image forming apparatus, rollers to stretch and suspend a transfer belt to which color images are transferred are equipped with small diameter portions and a marker is formed, the marker facing to the small diameter portions sequentially when the transfer belt runs.

Description

[0001] Cross References to Related Applications [0002] This application is based on and claims priority from prior Japanese Patent Application No. 2003-189558 filed on July 1, 2003, the entire contents of which are hereby incorporated by reference. technical field [0003] The present application relates to an image forming apparatus and a transfer belt for forming a multi-color developed image on a recording medium using an intermediate transfer device. Background technique [0004] There are image forming apparatuses such as color copiers or color printers that obtain color images using an electrophotographic method. In such a device, in order to realize the miniaturization of the device, multiple times of primary transfer (primary transfer) (rotating the photoconductor several times, superimposing images of different toners of various colors formed on the endless transfer belt at each rotation) ) to obtain a full-color image. Thereafter, the full-color image is second...

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Problems solved by technology

[0006] However, when markings are provided on the inner peripheral surface of the transfer belt as disclosed in this Japanese Patent Laid-Open No. 2002-3 1927, there is a possibility that due to a plurality of rollers for tensioning and hanging the transfer belt In contact with each other, marking degradation due to friction and wear may cause damage to the marking or false detection

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