Mita Industrial Co., Ltd.

Koichi Sasaki

Tatsuo Aizawa

Hiroshi Ishida

Yasuji Sumida

Takaji Washio

Akira Tanaka

Masahide Iseki

Kazumi Iida

An image-forming apparatus comprising an original-support plate for placing an original document thereon, a photosensitive member support stand disposed opposite to, and beneath, said original-support plate for placing a photosensitive member thereon, a charging-exposing unit for forming a latent electrostatic image corresponding to the original document on the photosensitive member, said charging-exposing unit being mounted between the original-support plate and the photosensitive member support stand for transverse reciprocation, and a power driving source for moving said charging-exposing unit reciprocally. The charging-exposing unit includes a mechanism for feeding the photosensitive member. During the return movement of the charging-exposing unit, the photosensitive member transfer mechanism acts on the photosensitive member placed on said support stand to move the photosensitive member incident to the return movement of the charging-exposing unit.

Image-forming apparatus having a photosensitive member transfer mechanism

A cutting apparatus for an electrostatic copying machine includes a fixed blade having a straight cutting edge, a rotary shaft mounted for rotation on the frame of the machine, and a rotary fixed to an carried by the rotary shaft, the rotary blade having a spirally curved cutting edge. A wrap spring clutch is capable of transmitting rotation of a continually rotating gear to the rotary shaft and rotary blade. The wrap spring clutch is prevented from operation by a control cog of a double cog member. An inclinable member operates the double cog member to release the wrap spring clutch to enable rotation of the rotary shaft and rotary blade. The double cog member has a rotation lock cog which stops the wrap spring clutch after a predetermined rotation of the rotary shaft and rotary blade.

Electrostatic copying apparatus

A mechanism for supporting a cover lid, particularly an original document cover lid of an electrostatic copying apparatus, includes a generally U-shaped support member for supporting the cover lid. A pair of arms of the support member are fixed to a pair of hinge members which are mounted on the machine frame for rotation about an axis. Support pieces are fixed to the hinge members for rotation therewith about the axis. First springs are connected to the support pieces for urging the hinge members, the support member and the cover lid to rotate about the axis in a first direction toward an open position of the cover lid. A revolving plate is pivotally mounted on the machine frame, and a support bar is fixed to one of the hinge members and extends into an elongated opening of the revolving plate, such that rotation of the hinge members around the axis causes the support bar to pivot the revolving plate between first and second positions. An oscillating lever mounted on the machine frame has a projection fitting into the notch when the revolving plate is in the first position and the cover lid is in the open position, such that the projection maintains the cover lid in the open position. A second spring biases the projection against an arc-shaped surface of the revolving plate when the cover lid is moved from the open position toward a closed position thereof.

Mechanism for supporting an original document cover lid of an

An electrostatic copying apparatus has a copying paper wound in a roll-like form, and an endless drive cable loop is wrapped about two drive reels rotated in one direction so as to cause part of an optical device or an original document carrier to travel reciprocally during a copying operation. Each copying operation mode, such as copying paper feeding, exposure, and copying paper cutting, is timed by means of mechanical constructions including a moving member to cause a paper feed detecting member, an exposure detecting member, a paper cut detecting member and a de-energization detecting member to pivot. These pivot motions result into a paper feed linkage actuation of a paper feed device, an exposure linkage energization of an exposure lamp, and a paper cut linkage actuation of a paper cut device.

An electrostatic photographic copying apparatus comprising a frame member having a transparent plate on which to place an original to be copied, a rotatable photosensitive drum having an electrostatic photographic material on its periphery, an optical system for projecting an image of the original onto the surface of the photographic material, an image-forming zone disposed exteriorly of, and alongside, the periphery of said photo-sensitive drum for forming on said sensitive material an electrostatic latent image corresponding to the image of the original or a developed image corresponding to the latent image, a transfer zone for transforming said image to a transfer paper, and a transfer paper forwarding system for feeding the transfer paper on which the image has been transferred to a discharge end through a desired treating zone.

Electrostatic photographic copying apparatus

An electrostatic photographic copying apparatus includes an optical system for projecting an image of an original onto the surface of a photosensitive drum. The system consists of openings for exposure of the original and the photosensitive drum, first and second reflex mirrors, and a mirror lens. The mirror lens is disposed so that light from the original is reflected by the first reflex mirror into said mirror lens and from the mirror lens back to the first reflex mirror. The light from the original is then reflected by the first reflex mirror to the second reflex mirror and from the second reflex mirror onto the photosensitive drum to thereby form a four-fold reverse image of the original being copied.

Compact optical system for an electrostatic photographic copying

A photosensitive drum-type electrostatic copying apparatus includes a size designating member disposed adjacent to the original to be copied. The size designating member is connected by a cable to a position adjusting member that is rotatably mounted coaxially with the drum. As the size designated member is moved, the position adjusting member is rotated to position a switch in correspondence to the desired length of the original to be copied and the transfer paper. The position of the switch determines the length of the transfer paper by activating a cutter when the desired length of the transfer paper is sensed by the switch.

Electrostatic copying apparatus having copy paper cut length control

A versatile electrostatic copying machine which can provide not only ordinary black-and-white and monochromatic copies and ordinary multi-colored copies but also artificial monochromatic and multi-colored copies of desired optional colors differing from colors of originals conveniently with ease without such troubles as color mingling and paper jamming is disclosed, said copying machine comprising an original-light exposing zone for irradiating an original to be copied in the stationary or moving state by a light source, a photosensitive layer-light exposing zone for light-exposing imagewise a statically charged photosensitive layer, an optical system for optically connecting said original-light exposing zone to the photosensitive layer-light exposing zone and projecting an image of the original on the photosensitive layer and a development mechanism for developing an electrostatic latent image formed on the photosensitive layer directly or after it has been transferred onto a transfer paper, wherein said optical system comprises a light-selecting mechansim for selecting an optional light from white light and color-separated lights and exposing the photosensitive layer to said selected light and an exposure light quantity-adjusting mechanism for adjusting the exposure light quantity to an optimum quantity with respect to each of a plurality of said lights, the development mechanism comprises a development operation-selecting mechanism for selecting an optional development operation among a plurality of development operations differing in the toner hue, and said light-selecting mechanism and development operation-selecting mechanism are actuated independently or in the state interlocked with each other so that a copy having a desired coloring effect can be obtained.

Growing community of inventors

Osaka, Japan

Koichi Sasaki