JPH0362355U

JPH0362355U -

Info

Publication number: JPH0362355U
Application number: JP12214289U
Authority: JP
Priority date: 1989-10-20
Filing date: 1989-10-20
Publication date: 1991-06-18
Anticipated expiration: 2004-10-20
Also published as: JP2529601Y2

Description

[Brief explanation of the drawing]

第１図は本考案の実施例の転写材支持体の表面
を示す平面図、第２図は第１図中の２−２線によ
る断面を拡大して示す断面図、第３図は他の実施
例の転写材支持体の表面を示す平面図、第４図は
転写紙密着凸部面積率と後端画像こすれ発生率と
の関係を実測データより示す曲線図、第５図は転
写ドラムを用いてカラー画像形成装置の一例の全
体構成を示す断面図、第６図はその転写ドラムの
構成を示す斜視図である。１……感光体ドラム、５……転写ドラム、１０
……転写ドラム枠体、１２……転写フイルム（転
写材支持体）、１２ａ……最大サイズ転写紙当接
範囲、１２ｂ……外周部、１７……Ｖ字形微細溝
、１５……転写紙（転写材）。 FIG. 1 is a plan view showing the surface of a transfer material support according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view showing the cross section taken along line 2-2 in FIG. 1, and FIG. FIG. 4 is a plan view showing the surface of the transfer material support of the example. FIG. 4 is a curve diagram showing the relationship between the transfer paper adhesion convex area ratio and the trailing edge image rubbing rate based on actual measurement data. FIG. 5 is a diagram showing the transfer drum. FIG. 6 is a sectional view showing the overall structure of an example of a color image forming apparatus using the present invention, and FIG. 6 is a perspective view showing the structure of a transfer drum thereof. 1... Photosensitive drum, 5... Transfer drum, 10
... Transfer drum frame, 12 ... Transfer film (transfer material support), 12a ... Maximum size transfer paper contact range, 12b ... Outer periphery, 17 ... V-shaped fine groove, 15 ... Transfer paper ( transfer material).

Claims

[Claims for Utility Model Registration] (1) A metal frame consisting of annular parts at both ends of the drum, a connecting part connecting these parts and extending in the axial direction, and the front end edge in the rotational direction of the drum. and a rear end portion thereof are held by the connecting portion of the frame body, and the transfer material is made of a dielectric flexible film that is wound around the frame body with the side edge along the outer periphery of the annular portion of the frame body. It is formed into a hollow cylindrical shape by the support body, has a transfer material tip gripping means at the connection part of the frame body, has a transfer drum that rotates in synchronization with the photosensitive drum at the same circumferential speed, A transfer charger provided inside the transfer drum sequentially superimposes toner images of different colors sequentially formed on the photoreceptor drum on the transfer material whose leading end is gripped by a means and supported by suction on the transfer material support. In a transfer device of a color image forming apparatus that transfers images, in which the surface of the transfer material support that comes into contact with the transfer material is roughened, the surface of the convex portion of the rough surface that actually comes into contact with the transfer material is A transfer device characterized by having an area occupation rate of 20% or more. (2) The transfer device according to claim 1, wherein the concave portion of the rough surface communicates to the outside of the transfer material contact range in a state where the largest size transfer material is adsorbed to the transfer material support. .