| 摘要 |
PURPOSE:To intensify the electric field of the end face of multistylus electrodes, to increase initial release of electrons, and to form a stable and sharp latent image with low voltage, by raising density of protuberances present on a dielectric film, and bringing at least one protuberance into contact with one end face of one stylus electrode. CONSTITUTION:An electrostatic recording material 15 consists of the dielectric film 14, a conductive layer 16, and a paper sheet 17, the film 14 is provided with a large number of protuberances, and in this figure, at least one protuberance, for example 14a, 14b, 14c, and 14d contact with the end face of each stylus electrode 10-14. As the support of the recording material, an aluminum drum 21 is used. Its surface is coated with an acrylic resin to form a base layer 22. It is coated with a carbon-mixed resin to form a conductive layer 23 having 10<7>OMEGA/ ?surface resistivity. This layer 23 is coated with a thermosetting resin mixed with alumina powder having 8mum particle diameter to form a dielectric layer 24 having a number of protuberances. A high quality print free from void and spots is obtained by using the recording material thus formed and printing letters on the material. |
