JPS63141965U

JPS63141965U -

Info

Publication number: JPS63141965U
Application number: JP3541787U
Authority: JP
Priority date: 1987-03-11
Filing date: 1987-03-11
Publication date: 1988-09-19

Description

[Brief explanation of the drawing]

第１図は本考案実施例による画像形成装置の全
体構成図、第２図は第１図に示した画像形成装置
に具備されている転写ドラムの斜視図、第３図は
第１図に示した画像形成装置における感光体ドラ
ムと転写ドラムとの内部構造を示す断面図、第４
図は第１図に示した画像形成装置における転写ド
ラムのシート排出側の構造を示す模型図、第５図
は第１図に示した画像形成装置の制御系を示すブ
ロツク図、第６図は本考案実施例による作用を示
す模型図である。１……画像形成装置、２……感光体ドラム、３
Ｇ……転写ドラム、３Ｃ，３Ｄ，３Ｅ……開口部
、３Ｇ……転写用コロ放電器、３Ｈ……シート分
離分コロナ放電器。 FIG. 1 is an overall configuration diagram of an image forming apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view of a transfer drum included in the image forming apparatus shown in FIG. 1, and FIG. 3 is a diagram shown in FIG. 1. FIG. 4 is a sectional view showing the internal structure of a photoreceptor drum and a transfer drum in an image forming apparatus;
The figure is a model diagram showing the structure of the sheet discharge side of the transfer drum in the image forming apparatus shown in FIG. 1, FIG. 5 is a block diagram showing the control system of the image forming apparatus shown in FIG. 1, and FIG. FIG. 3 is a model diagram showing the effect of the embodiment of the present invention. 1... Image forming device, 2... Photosensitive drum, 3
G...Transfer drum, 3C, 3D, 3E...Opening, 3G...Corona discharger for transfer, 3H...Corona discharger for sheet separation.

Claims

[Claims for Utility Model Registration] A rotatable transfer drum capable of carrying on its surface a sheet to which an image of each color component formed on the photoconductor is transferred is used, and the transfer drum is rotated multiple times to transfer the image to the photoconductor. In an image forming apparatus that obtains a multicolor copy by superimposing images of each color component formed on a sheet onto a sheet, the transfer drum has a gripper on a part of its circumferential surface for gripping the leading edge of the sheet. , an opening, and a sheet disposed inside thereof at a position facing the opening, downstream of the transfer corona discharger and the transfer corona discharger in the moving direction of the sheet. It is equipped with a separating corona discharger, and when making single-color copies, it stops with the above-mentioned opening corresponding to the photosensitive drum, and when making multi-color copies, it rotates at a rotation speed corresponding to the number of colors to be transferred. while the sheet separating corona discharger is activated during the passage of the sheet through the opening of the transfer drum in the case of monochromatic copying, and when repeated transfers to the sheet have been completed in the case of multicolor copying. An image forming apparatus characterized in that it operates at times.