Oki Electric Industry Co., Ltd.

Oki Data Corporation

Kiyoshi Matsuda

Hiroshi Kikuchi

Hisao Ono

Yoshiharu Momiyama

Minoru Mizutani

Masahiro Fukuda

Tatsuya Murakami

Shigeki Nakajima

Yukio Ota

Toyokazu Shiraishi

Naoki Sunaga

Yoshitomo Koga

Kazuki Obara

Shuuichi Fujikura

Eisaku Mutou

Yasuyuki Katou

A medium thickness detecting apparatus detects the thickness of a recording medium. A displacement section is disposed in a transport path through which a recording medium passes. When the recording medium passes the displacement section, the displacement section displaces in a direction substantially normal to the surface of a recording medium. An amplifying section amplifies a displacement of the displacement section by a predetermined factor. A thickness determining section outputs a signal representative of an amplified value of the displacement. The displacement section may be one of two rollers between which the recording medium passes, and displaces upward when the recording medium passes between the two rollers. Alternatively, the displacement section my be positioned to sit on a stage provided in the transport path such that the displacement section is pushed away from the stage when the recording medium passes between the displacement section and the surface.

Medium thickness detecting apparatus

In order to provide a reversing section for reversing the recording paper for recording on both sides, in such a manner as to avoid increase in size of the device, reversing rollers,are provided over the rear part of the paper cassette,, and a reversing path,is formed at the back of the paper cassette,. The recording paper,having passed the reversing rollers,enters the reversing path,. Additional reversing path,is provided under the paper cassette,, and the recording paper,moves from the reversing path,into the reversing path

Image recording device having a reversing section

Replaceable toner cartridge with internal stirring member, and

A toner cartridge has an outer cylinder and an inner cylinder contained in the outer cylinder in such a relation that it is adjacent to the outer cylinder and rotatably slidable relative thereto. Outer cylinder toner discharge openings are formed in the outer cylinder and spaced in the longitudinal direction thereof. Inner cylinder toner discharge openings are formed in the inner cylinder and spaced in the longitudinal direction thereof, the inner cylinder toner discharge openings being alignable with the outer cylinder toner discharge openings. Opposite ends of the outer cylinder are provided with notches. The outer cylinder toner discharge openings are spaced by at least one outer cylinder rib. The inner cylinder toner discharge openings are spaced by at least one inner cylinder rib which is not axially aligned with the outer cylinder rib.

Cylindrical toner cartridge for electrophotographic printer

A mechanism for mounting and removing a toner cartridge in a development device for use in an electrophotographic recording apparatus or a photocopier includes a rotating member for mounting a cartridge filled with toner for replenishing onto a main body at a set position and opening a toner opening. A cross-shaped projection on the main body and a cross-shaped groove on the cartridge are provided for preventing lifting of the cartridge when the rotating member is rotated in one direction. The rotating member is rotated from the set position in another opposite direction, and is subsequently returned to the set position to have the projection and the groove engaged or disengaged.

Mechanism for mounting and removing a toner cartridge of a development

A pin platen mechanism includes coiled springs mounted in respective retaining holes formed in a sprocket wheel for biasing respective sprocket pins to the outside at all times. A cam groove in a cam member has freely fitted therein projections of the sprocket pins. A wider part of the cam groove enables the pins to be withdrawn inwardly only when necessary.

Pin platen mechanism

A gear mechanism includes a pair of drive transmission gears laterally movably disposed between a base plate and a housing provided on the base plate, and a control structure for restricting the lateral movement of the drive transmission gears. Turning force from a single driving gear is transmitted to the drive transmission gears, movements of which are controlled by the control structure. In the different embodiments, the controlled turning forces of the drive transmission gears can be transmitted to either or both of the driven gears.

Planetary gear mechanism

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Tokyo, Japan

Kiyoshi Matsuda