Abstract: An image forming apparatus of the present invention includes a particle conveying body made up of a light-transmitting conductive layer, an insulative'screen provided on the conductive layer and formed with a number of pores, and a screen electrode formed on the screen. Photoconductive, colored particles are charged to negative polarity and then caused to fill the pores by an electric field. When the particles in the pores are exposed via the conductive layer, electron-hole pairs are generated in the particles. An electric field of as high as 104 V/cm or above is formed between the conductive layer and the screen electrode and separates the electrons and holes. The electrons leak to the conductive layer and cause the particles to be charged to positive polarity. An electric field formed between a facing electrode positioned behind a recording medium and the conductive layer causes the particles to fly toward and deposit on the medium.

Abstract: In a wet-type developing apparatus in which a latent image carrying member and a squeeze roller are moved in the opposite directions to each other while they are not brought into contact with each other at the closest position thereof, a liquid toner layer on the latent image carrying member which is smaller in thickness than the gap interval between the latent image carrying member and the squeeze roller is made to invade into the gap, and the liquid toner invading into the gap between the squeeze roller and the latent image carrying member are brought into contact with the squeeze roller by electrical attractive force based on electric field formed between the squeeze roller and the latent image carrying member, thereby forming meniscus.

Abstract: A porous photosensitive body is provided which is excellent for mass production and lower in production costs and is capable of obtaining a good degree of image-formation and of increasing its productivity and reliability. The porous photosensitive body is provided with a drum used for forming a photosensitive body constructed by stacking, in order, an insulating layer, a photo-conductive layer and a translucent conductive layer on an inner circumferential face of a surface electrode which is composed, of a metal jointless cylinder drum having a large number of fine holes which are aligned at equal intervals both in a circumferential direction and in a direction of an axial line of the cylindrical drum and are opened on inner and outer circumferential faces of the metal jointless cylinder and wherein the insulating layer is provided with a through hole communicating with each of the fine holes.

Abstract: An intermediate belt made of an endless belt is provided by 45 degrees inclined horizontally and looped over two rollers at both its ends, and four photosensitive drums are provided in contact with the top surface of this intermediate belt. A reflection mirror is provided over each photosensitive drum, and a single polygon mirror is provided on almost the same level as these reflection mirrors. The polygon mirror is provided on the side of the reflection mirror of which optical path to the corresponding photosensitive drum is the longest so that the optical path lengths from the polygon mirror to the respective photosensitive drums are equal to each other.

Abstract: A liquid electrophotographic developing apparatus capable of preventing image drift and reducing the load in the squeezing process is disclosed. A developing roller faces a photoreceptor belt with a predetermined spacing to supply a liquid developer to the photoreceptor belt while rotating at a peripheral velocity in the opposite direction to that of the photoreceptor belt in a developing region thereon. A peripheral velocity ratio of the peripheral velocity to a moving velocity of the photoreceptor belt is determined so as to maximize a solid component ratio of a developed toner layer on the photoreceptor belt.

Abstract: An image forming apparatus of the present invention includes a particle conveying body made up of a light-transmitting conductive layer, an insulative screen provided on the conductive layer and formed with a number of pores, and a screen electrode formed on the screen. Photoconductive, colored particles are charged to negative polarity and then caused to fill the pores by an electric field. When the particles in the pores are exposed via the conductive layer, electron-hole pairs are generated in the particles. An electric field of as high as 104 V/cm or above is formed between the conductive layer and the screen electrode and separates the electrons and holes. The electrons leak to the conductive layer and cause the particles to be charged to positive polarity. An electric field formed between a facing electrode positioned behind a recording medium and the conductive layer causes the particles to fly toward and deposit on the medium.

Abstract: In a wet-type developing apparatus in which a latent image carrying member and a squeeze roller are moved in the opposite directions to each other while they are not brought into contact with each other at the closest position thereof, a liquid toner layer on the latent image carrying member which is smaller in thickness than the gap interval between the latent image carrying member and the squeeze roller is made to invade into the gap, and the liquid toner invading into the gap between the squeeze roller and the latent image carrying member are brought into contact with the squeeze roller by electrical attractive force based on electric field formed between the squeeze roller and the latent image carrying member, thereby forming meniscus.

Abstract: A porous photosensitive unit has a transparent conductive layer formed on a surface of a transparent substrate. A photoconductive layer is formed on a surface of the transparent conductive layer. A porous insulating layer formed on a surface of the photoconductive layer has a plurality of holes for holding conductive color particles. The plurality of holes includes a first hole and the adjacent second and third holes. An upper or screen electrode is formed on a surface of the porous insulating layer except where the holes are formed. The photosensitive unit includes an optical arrangement in which, when a light source emits light to cause conductive color particles to fly out of the first hole only, the light exposes a region, within the photoconductive layer, which substantially coextends with a surface portion of the photoconductive layer that is exposed by the first hole.

Abstract: An image recording apparatus and an image recording method enable high density and without blank space between pixels printed on a recording medium to be printed. The image recording apparatus comprises a multi-hole photoreceptor provided with a transparent conductive layer, photoconductive layer, and multi-hole layer having a plurality of holes arranged with equal interval, on a transparent supporting structure, and an opposite electrode arranged so as to be opposite to the multi-hole photoreceptor with interval while inserting a recording medium. Conductive colored particles which fly in order from a plurality of holes of the multi-hole photoreceptor form respective pixels by driving the multi-hole photoreceptor corresponding to the pixel.

Abstract: A method for manufacturing a photoreceptor includes the steps of consecutively forming a transparent conductive layer, a photoconductive layer, insulation layer and an electrode layer on a transparent support member, covering the electrode layer with a photo-setting dry film having a mask pattern therein, and sand-blasting the electrode layer and the insulation layer through the mask pattern to form an array of pores in the electrode layer and the insulation layer. A porous layer having a uniform thickness and uniform arrangement of pores can be obtained.

Abstract: An electropotographic photoreceptor has a charge-transfer layer including at least two of charge-transfer materials, difference in oxidation potential between the charge-transfer materials being 0.1V or less and the charge-transfer materials having chemical structure similar to each other.