Abstract: A sheet of paper, plastic or the like on which an image has been formed using a toner that is photochemically decolorizable by absorption of near infrared rays is illuminated with near infrared rays under the state wherein the image is heated to a temperature equal to or higher than the glass-transition temperature of a binding resin of the toner. The color of the toner can thereby be easily and rapidly eliminated. This enables the reuse of the sheet to be realized easily and at a low cost.

Abstract: A contact charging device which charges the surface of an electrostatic latent image carrying member rotating at a high speed by contacting a charging member to the surface of the image carrying member. The charging member has a conductive substrate, a conductive elastic layer superimposed over the conductive substrate and having a JIS-A hardness of 30.degree. or greater, and a conductive resin layer superimposed over the conductive elastic layer and having a 10% elongation load of not more than 700 gf on a 1 cm wide section.

Abstract: A sheet of paper, plastic or the like on which an image has been formed using a toner that is photochemically decolorizable by absorption of near infrared rays is illuminated with near infrared rays under the state wherein the image is heated to a temperature equal to or higher than the glass-transition temperature of a binding resin of the toner. The color of the toner can thereby be easily and rapidly eliminated. This enables the reuse of the sheet to be realized easily and at a low cost.

Abstract: In an apparatus for conveying dielectric sheets used in copying machines, etc., sheets are held by electrostatic adhesion on the surface of a conveyor when such surface is electrically charged and thus conveyed by the conveyor, wherein a dielectric layer consisting of a dielectric material and electrode parts consisting of a conductive material, which are electrically connected to portions of the dielectric layer and grounded, are provided adjacent to each other on an adhesion surface of the conveyor.

Abstract: An electrostatic charge emitting apparatus includes a discharging member having an electrode member, an electrically conductive elastic rubber member having fine conductive particles contained therein and an insulating layer having a number of apertures therein and being formed on the conductive elastic rubber member; and the electrode member is connected to an electric power source and a surface of the insulating layer is urged against a member to be charged or de-charged: and the member to be charged or de-charged is charged or de-charged by discharge in the apertures of the insulating layer generated by emitting electrostatic charge toward the member at a lower threshold voltage and thus the generation of ozone gas can be decreased.

Abstract: A developing method for developing electrostatic latent images with a toner and carrier particles in which particles as a third component are preliminarily mixed with the toner to be replenished, and rising in charge of the toner to be replenished into the developing material is accelerated, without generation of toner dust or scatter after the replenishment so as to be capable of being fully suitable for a high speed copying apparatus, while the charging characteristics of the carrier are not deteriorated even by the addition of the third component particles, with a favorable separation of copy paper sheets from an electrostatic latent image support member.