Sharp Kabushiki Kaisha Corporation

Syoichi Nagata

Kunio Ohashi

Yoshiharu Tsujimoto

Masatsugu Nakamura

Hiromu Sasaki

Tadashi Tonegawa

Kazuki Wakita

Yoshikazu Fujiwara

Katsuhiro Nagayama

Kazuo Maeyama

A photosensitive sheet comprising a sheet-shaped substrate, one surface of which is coated with a light-reflective substance or which is made of a light-reflective substance, and pressure-rupturable capsules that coat the light-reflective surface of the substrate or the other surface of the substrate, the pressure-rupturable capsules containing chromogenic materials and photosensitive materials that are hardened when illustrated with light, and a method for the formation of images using the said photosensitive sheet.

Photosensitive sheet and a method for the formation of images using the

An image forming apparatus including an auxiliary exposure device, in which a photoreceptive sheet coated with photosensitive microcapsules coated is subjected to image forming exposure and auxiliary exposure so as to form a selectively set image thereon by the microcapsules. The auxiliary exposure device includes a light source lamp, a plurality of filters for absorbing or reflecting portions of light of the light source lamp according to specific ranges of wavelengths of the portions of the light of the light source lamp, respectively and a setting member for setting ratios of areas of the light source lamp covered by the filters, respectively.

Image forming apparatus

To fix an image formed on a transfer sheet by a developing agent containing a thermoplastic material, an image fixing device includes two contact-type heaters, one of them heating at a temperature below the softening or melting temperature of this thermoplastic material and the other heating at a higher temperature above this softening or melting temperature.

Image fixing device

An image glazing device for applying a gloss to an image formed on an image receiving material is accommodated in an image forming apparatus the image glazing device being provided with at least two rollers disposed in a direction of feed of the image receiving material, an image glazing belt passed between and rotatably driven by the two rollers for applying the gloss to the image, a heater accommodated in or disposed in the vicinity of an upstream one of the two rollers for heating the image glazing belt and a paper transport guide located immediately below and along the image glazing belt for transporting the image receiving material wherein the diameter of the downstream one of the two rollers is determined in accordance with the rotating speed of the image glazing belt and the temperature of the image glazing belt at a location where the downstream roller is provided so that image offsetting will not take place. A guide member may be provided at a predetermined angle with the paper transport guide is provided in the vicinity of the downstream roller which is conducive to easy separation of the image receiving material from the image glazing belt.

Image glazing device

A sheet-exposure stand supporting a photosensitive sheet on its sheet-placement surface, the photosensitive sheet being composed of a light-permeable substrate that is coated with pressure-rupturable capsules that contain chromogenic materials and photosensitive materials that are hardened when illuminated with light, and the sheet-placement surface being coated with or made of a light-reflective substance, and a method for the formation of images using the same.

Method for the formation of images and an apparatus for the same

A photoreceptor with a photoconductive layer of amorphous silicon has an overcoating layer to protect the photoconductive layer and to prevent formation of SiO.sub.x. The overcoating layer is amorphous C.sub.1-x X.sub.x, Ge.sub.1-x X.sub.x, (BNGe).sub.1-x X.sub.x or (BNC).sub.1-x X.sub.x where x is greater than or equal to 0 and smaller than 0.5 and X is H, F or Cl.

Electrophotographic photoreceptor comprising amorphous silicon layer

For an image formation apparatus having supplemental light sources in addition to an optical system for providing an image forming light beam reflected from an original to be copied, a control unit controls exposure by these supplemental light sources according to the photosensitivity characteristics of microcapsules of different kinds with which a light-receiving sheet is coated and which respond differently to individual beams from the supplemental light sources. The control unit may also be designed to take into consideration the effects of ambient humidity and the user's choice for particular coloring.

Image formation apparatus with supplemental light source

An image forming apparatus makes use of a photosensitive sheet having a surface coated with microcapsules encapsulating a light-curable agent and a colorless dye and an image transfer sheet having one surface coated with a developing agent having an chromogenic effect on the encapsulated colorless dye. When these sheets are superposed one on top of the other and transported to and pressed together between a pair of pressure rollers, the image transfer sheet is transported to the pressure rollers by making an angle greater than 0.5.degree. with the axial direction of these rollers.

Photosensitive microcapsule recorder with transfer sheet transported at

An image forming apparatus such as a copier of the type using a light and pressure sensitive material to form a visible image by exposing photosensitive microcapsules to image forming light to thereby form an invisible pattern of selectively hardened microcapsules and pressing these microcapsules against a transfer sheet superposed thereon to rupture the microcapulses according to the pattern to effect chromogenic reactions selectively, is provided with a supplemental light source for exposing areas of the material not intended for forming an image such that unnecessary microcapsules in these areas do not cause stains on components of the apparatus.

An electric photographical copying system which provides a main charger for charging the photo-conductive layer of the recording medium, an optical exposure means for projecting an image of an original onto the photo-conductive layer to make an electrostatic latent image thereon, a developing device for developing the latent image with developer, a transfer device for transferring the image developed onto a copy sheet, a cleaning device for cleaning residual developer on the photo-conductive layer and an erasing device for erasing the surface potential of the photo-conductive layer. The devices are successively activated in an order to use the recording medium repeatedly.

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Nara, Japan

Syoichi Nagata