Image forming apparatus and process cartridge removably mounted thereto
A technology of an imaging device and a process cartridge, which is applied in the direction of equipment of an electrical recording process applying a charge pattern, an electrical recording process applying a charge pattern, an electrical recording technique, etc.
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no. 1 approach
[0068] Take a color printer as an example and refer to the following figure 2 A first embodiment of the image forming apparatus of the present invention is described. As shown, the color printer includes four image areas 1Y (yellow), 1C (cyan), 1M (magenta) and 1Bk (black), which are assigned colors represented by Y to Bk, respectively. Elements included in the image areas 1Y to 1Bk are also distinguished from each other by suffixes between Y to Bk. The color printer additionally includes an optical writing unit 8 , an intermediate image transfer unit 10 , a bias roller 5 for second image transfer, a registration roller pair 4 , a paper cassette 2 , and a fixing unit 6 .
[0069] The optical writing unit 8 includes a laser or a light source, a polygon mirror, an fθ lens, and a mirror. The writing unit 8 scans the surface of each photoconductive drum or image carrier, which will be described later, and the laser beam corresponds to image data.
[0070] The image areas 1Y to...
Embodiment 1
[0096] Figure 7 Parts of Embodiment 1, particularly one of the image areas 1Y to 1Bk and the belt 11 are shown facing each other. As shown, the contact member 56 protrudes upward from a portion of the housing 55 of the developing unit 50 against the housing 17 of the intermediate image transfer unit 10 . The upper end of the contact element 56 is in contact with the bottom of the housing 17 .
[0097] The steps of attaching or detaching the intermediate image transfer unit 10 to or from the printer body to replace the belt 11 will be described below. First, the operator opens an unshown door hinged to the front end of the printer body, and then opens the panel 71, see Figure 8A with 8B . Subsequently, the operator rotates the release lever to raise the driving roller 15 and the driven roller 13, so that the belt 11 is transferred to Figure 6C installation / removal positions shown. The operator then pulls out the intermediate image transfer unit 10 by holding it with bo...
Embodiment 2
[0107] Figure 9A Example 2 of the illustrated embodiment is shown, in particular one of the image areas 1Y to 1Bk and the strip 11 , facing each other. As shown, the handle 57 protrudes partially upward from the developing unit 50 toward the housing 17 of the intermediate image transfer unit 10 . The upper end of the handle 57 abuts against the bottom of the housing 17 .
[0108] More specifically as Figure 9B As shown, the handle 57 is configured such that an operator can lift the developing unit by holding the handle 57 when the developing unit 50 is not mounted on the printer body. When the developing unit 50 is mounted on the printer body, the top of the handle 57 contacts the bottom of the housing 17 to keep the developing unit 50 and the intermediate image transfer unit 10 spaced apart from each other by a predetermined gap. Based on this, the handle 57 functions as a contact element. The rest of the construction and installation / removal steps are the same in Embod...
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