Dainippon Screen Mfg. Co., Ltd.

Kenji Kawai

Takumi Yoshida

Eiji Kanada

Junichi Oka

Eiji Miyasaka

Tsutomu Ueyama

Kazuma Kan

Iwao Hirose

Takeshi Sugata

Koji Yamashita

Masakzu Ohtorii

An optical beam scanning system is constructed with less optical elements. A light beam (B.sub.1) of parallel rays passes through a first image-forming system (L.sub.1). The first image-forming system consists of a cylindrical lens (2) having a refracting power in a direction equivalent to a main scanning direction (X) and a spherical convex lens (3). Focuses of the cylindrical lens and the spherical convex lens are within a prescribed allowance. A light beam (B.sub.11) passing through the spherical lens has a character of parallel rays within a vertical plane and a character of convergent rays within a horizontal plane to be focused on a deflection surface (4a). A reflected light beam (B.sub.2) is finally focused on a surface-to-be-scanned (8) through a second image-forming system (L.sub.2).

Optical beam scanning system

An image reading and recording apparatus comprises a single housing, a moving type original holder provided on the housing, an image reading station including a fixed type image forming optical system provided in the uppermost portion of said housing, a magazine located in the housing horizontally adjacent to the image reading station, an image recording station located in the housing below the image reading station and an electrical control unit for image reading and for image recording located in the housing below the image recording station.

Image reading and recording apparatus

An apparatus for correcting snaking of rollfilm comprises a driving roller for feeding the rollfilm to the exposure position with the film being maintained flat, pinch rollers provided such that they can approach or be separated from the driving roller, switching means for switching between the abutment and separation of the pinch rollers and the driving roller, and cutting means for cutting the rollfilm.

Method and apparatus for correcting snaking in a rollfilm feeding

A process camera apparatus for forming a halftone image and a line image on a photosensitive material such as a positive or negative film. The apparatus comprises a base; a transparent platen provided on the base; a light-shielding cover covering the upper side of the transparent platen such as to form a light-shielded region on the transparent platen; a screen device including a contact screen and a screen frame for supporting the contact screen, the screen device being withdrawably disposed on the portion of the transparent platen within the light-shielded region; a pair of rollers disposed adjacent one end of the base and adapted for conveying the photosensitive material into the light-shielded region; and a light-shielded condition maintaining device adapted to maintain the light-shielded condition in the light-shielded region when the screen device is being taken out from the light-shielded region. The apparatus may be provided with a guide plate for guiding the photosensitive material while the same is being fed onto the transparent platen by the pair of rollers.

Process camera apparatus

Growing community of inventors

Shiga, Japan

Kenji Kawai