SU1043583A1 - Method of electro-photographic application of symbols and captions of dielectric surface - Google Patents

Abstract

THE METHOD OF ELECTROPHOTOGRAPHIC APPLICATION OF SIYVOLOV AND TRANSFERRING TO A DIELECTRIC SURFACE, eaK-, included in the application of the image on the selenium plate, the image of the image with the powder developer, the translations of the image of the program, the pro- surface, in the dielectric field, and with the fact that, in order to improve the quality of the applied symbols, before applying the powdered the images on the dielectric surface of the latter give a charge with a polarity opposite to that of the powder developer. - S O) C

Description

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The invention relates to electrography and can be widely used in instrument and mechanical engineering for placing high-quality symbols and inscriptions on a dielectric surface.

The known method of electrophotographic deposition of symbols and inscriptions on a dielectric surface consists in applying an image on a selenium plate, making an image with a powder developer, transferring the powder image to a flexible material by telling it electric charge by transferring the powder image to a dielectric surface in the dielectric field Sh .

The disadvantage of this method is the poor quality of image transfer to flat, conical and cylindrical surfaces.

The aim of the invention is to improve the quality of applied symbols on dielectric surfaces.

In order to achieve this goal, according to the method of electrophotographic application of symbols and inscriptions on a dielectric surface, consisting in drawing an image on a selenium plate, displaying an image by a powder developer, transferring the powder image to a flexible carrier by transferring an electric charge to it and transferring the powder images on the dielectric surface in the dielectric field, before applying the powder image on the dielectric surface ited last reported a charge with a polarity opposite to the polarity of the charge of the developer powder.

FIG. 1 shows a diagram of the operation of the device for carrying out the proposed method in the reporting of electrostatic charge of a part / in FIG. 2.- the same when transferring the powder image to the part.

The device consists of a high-voltage DC source 1, a corona discharge 2 with a grounded shield, a switch 3 and an insulator 4

The device for implementing the proposed method works as follows.

Item 5 is installed on insulator 4, switch 3 is switched to the closed state, the terminal is connected and the high-voltage power supply is turned on. After the electrostatic charge of the part has been reported (after 1-2 s), the switch 3 is opened and the high-voltage source is disconnected. On the charged part of the face impose flexible material b with loose powder mirror image obtained on the electrophotographic apparatus. working on the selenium layer and plain paper, they close the switch of 3 g and connect a high voltage source and move the corona discharge device over the part with flexible material. The high-voltage source is disconnected, the flexible material is removed and the fixing is performed by thermal (or other) means. In the case of symbols and inscriptions on the dielectric part, it is necessary to place a conductive screen under it.

The proposed method and device for its implementation allow to apply high-quality artistic symbols and inscriptions in black and white and multi-color image on parts with electroplated paint and varnish polymeric coatings, as well as on dielectric ones with flat Cylindrical and conical surfaces. If a multi-color image is applied to a part, the number of capturing operations may correspond to the number of image colors without affecting the image quality.

The use of the proposed method in comparison with the known method of manufacturing printed electrical circuits allows to provide quality and better resolution when applying artistic symbols and inscriptions on parts with different geometric surfaces, to fulfill parts with modern technical and aesthetic requirements in color and black and white. , and also to reduce the number of units of necessary equipment used, for example, in screen printing, which is especially important in the conditions of modern industrial of manufacture.

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Claims (1)

METHOD FOR ELECTROPHOTOGRAPHIC APPLICATION OF SYMBOLS AND LETTERS ON DIELECTRIC SURFACE, eaK-. involved in applying an image to a selenium plate, developing an image by a powder developer, transferring the powdered developed Image to a flexible material by communicating an electric charge to it, and transferring the powder Image to a dielectric surface in a dielectric field, as a result of which In order to improve the quality of the applied symbols, before applying the developed powder image to the dielectric surface of the latter, a charge with a polarity opposite to and charge poroshnovogo developer. ... $ £ Λ * Figure 1> '1043583