JPS61149958A - Electrophotographic sensitive body - Google Patents

Abstract

PURPOSE:To facilitate observation and discrimination, and operation by typing discrimination marks on the position of the ineffective image region of a photosensitive body prepared by forming a photosensitive layer on a cylindrical substrate. CONSTITUTION:The discrimination marks 3, such as typed letters, are formed by ink jet on position of the ineffective region at the outer circumference 2 of the photosensitive body prepared by forming the photosensitive layer on the cylindrical substrate 1, thus permitting the discrimination marks 3 formed on the outer part 2 to be easily observed and discriminated, and easily typed, accordingly, not to deteriorate the productivity of the photosensitive body, and the preceding marks to be removed, in the case of reusing the recovered substrate 1, together with the used photosensitive layer at the same time, and subsequently, no trouble to be induced in its management.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electrophotographic photoreceptor having an identification mark on its surface.

[Prior art]

Electrophotographic photoreceptors (hereinafter simply referred to as photoreceptors) used in electronic copying machines and the like are usually made of a cylindrical base made of a conductive material such as metal, and the outer periphery of the base is made of selenium, cadmium sulfide, a photoconductive organic compound, etc. It is constructed by providing a photosensitive layer consisting of:

These photoreceptors, which are industrially produced, installed in copying machines, etc., and shipped in large quantities are subject to production process management, quality assurance,
Variety due to after-sales service etc.

It is necessary to attach various identification symbols such as loft number.

Conventionally, these identification symbols have been written on a label and affixed to the inner surface of the cylindrical substrate, or have been substituted with the loft number of the image forming unit incorporating the photoreceptor.

[Problem that the invention seeks to solve]

The above-mentioned method of attaching a label has problems in terms of productivity, as it is easily visible during identification, and it is difficult to automate the production and attachment of the label. When collecting used photoreceptors, renewing the photosensitive layer, and reusing them, there are many problems in use and manufacturing, such as having to remove and reapply the old labels. A photoreceptor having the following characteristics has been desired.

[Means for solving problems]

The above-mentioned problem has been solved by an electrophotographic photoreceptor having an identification symbol at the position of the non-effective image area on the outer periphery of the cylindrical substrate.

The photosensitive layer in the photoreceptor is provided over almost the entire outer periphery of the cylindrical substrate, but there is usually a margin left on both side edges that is not used for image formation, that is, an ineffective image area. . That is, the non-image area on the photosensitive layer, the coating layer other than the photosensitive layer, and the substrate. The photoreceptor of the present invention is characterized by having an identification symbol in this portion.

FIG. 1 is a perspective view showing an example of the electrophotographic photoreceptor of the present invention. Reference numeral 1 denotes a cylindrical substrate, and a photosensitive layer is provided over almost the entire width S of its outer periphery, but the effective image area has a width of l+m, and on both sides there are portions 2, 2 outside the effective image area of a width of 1,000 yen.
' occurs. 3 is an identification symbol printed on the portion 2. The type, design, color, etc. of the symbols to be printed can be arbitrarily selected.

As the cylindrical substrate used in the photoreceptor of the present invention, those formed of known materials that are normally used for cylindrical substrates of electrophotographic photoreceptors can be freely used, and the photosensitive layer is also made of known materials for electrophotography. Photosensitive layers, such as selenium, cadmium sulfide, amorphous silicon, organic photoconductive materials, etc., can optionally be used.

The means for providing the identification mark may be any means capable of putting the mark on the cylindrical surface, and examples thereof include a thermal head, wire dot, inkjet, letterpress printing, offset printing, and the like. Preferably, any material that can be printed may be used.

For example, there are various methods such as direct writing with a felt-tip pen, etc., printing with a rubber plate, etc., but methods such as the inkjet method that can print without contact are the most effective since there is no risk of damaging or staining the surface of the photosensitive layer. These are listed as preferred.

FIG. 2 is an example of a printing device using an inkjet. A handling robot 21 holds the photoreceptor 22 in a predetermined position and rotates it in the direction of the arrow. Reference numeral 23 denotes an inkjet printer; 24, a printer head of which jets ink in accordance with the identification symbol IC to be written, and prints the symbol at a predetermined position outside the effective image area of the photoreceptor 22; The symbols may be input in advance into the control unit of the printer, or may be remotely controlled from a central control room.

〔Effect of the invention〕

The electrophotographic photoreceptor of the present invention has an identification symbol printed on the outer periphery of the photoreceptor, making it easy to see and identify.Also, it is easy to print and does not impair the solidity of the photoreceptor.
When the recovered substrate is reused, the old symbol is also removed by removing the old photosensitive layer, which has many advantages.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an electrophotographic photoreceptor according to the present invention, and FIG. 2 is a schematic diagram of a printing device using an inkjet method. 1... Same cylindrical base 2... Portion outside the effective image area 3... Identification symbol

Claims (3)

[Claims] (1) An electrophotographic photoreceptor having a photosensitive layer on the outer periphery of a cylindrical substrate, the electrophotographic photoreceptor having an identification symbol at a position of a non-effective image area on the outer periphery. (2) The electrophotographic photoreceptor according to claim 1, wherein the identification symbol is printed. (3) The electrophotographic photoreceptor according to claim 2, wherein the identification symbol is printed by inkjet.