Konishiroku Photo Industry Co., Ltd.

Ricoh Company, Ltd.

Other

Konishiroku Photo Industry

Ryubun Seimiya

Noriyoshi Tarumi

Hidetoshi Yano

Hiroshi Tokunaga

Masahiko Matsunawa

Makoto Obu

Shigeru Inowa

Hiromi Demizu

Fumio Iwai

Isao Nosaka

Makoto Tomono

Minoru Takahashi

Hiroshi Tsuchiya

Masakazu Kokiso

Hirozo Funaki

Yutaka Yamada

Hiroshi Ogawara

Yasuyuki Fujisaki

Akira Shinozaki

A developing device employing a non-magnetic one-component toner is provided and it includes a developing sleeve, which is driven to rotate in a predetermined direction past a developing region where toner carried on the sleeve is supplied to develop an electrostatic latent image formed on an image bearing member, a tank for storing therein a quantity of non-magnetic one-component toner and a flexible supply roller generally disposed between the tank and the developing sleeve for supplying the toner from the tank to the developing sleeve. The flexible supply roller rotates so as to be in sliding contact with the developing sleeve. With the provision of such a supply roller, even non-magnetic one-component toner can be suitably supplied to the developing sleeve to form thereon a thin film of charged toner for use in developing an electrostatic latent image.

Developing device using a single component developer

A device for developing an electrostatic latent image includes a developing sleeve and a sponge roller which is in scrubbing contact with the sleeve. Thus, even if non-magnetic, single component toner is used, it is electrically charged due to the scrubbing action and thus electrically attracted to the developing sleeve. A doctor blade is pressed against the developing sleeve and thus the toner is formed into a thin film having sufficient charge and a predetermined thickness. As the developing sleeve further rotates, thus formed thin film is brought to a developing region where the latent image is developed by the thin film of toner. Preferably, the blade is arranged in a particular orientation with respect to the sleeve. The blade may be movably provided so as to be pressed against the sleeve by an appropriate biasing element. The sleeve and the sponge roller may be driven to rotate same or opposite in direction, as desired. The sleeve may be formed to be elastically deformable. The sleeve may be set in oscillation. The blade is preferably comprised of a copolymer of ethylene and tetrafluoroethylene.

Developing device using single component toner

In a developing apparatus for a copying machine in which a latent image on a latent image carrying member is developed by supplying a thin layer of a developer to the latent image carrying member, an electrically insulating layer having a number of electrically conduction spots dispersed therein is provided on a developer carrier member for supplying a developer from a developer storage to a latent image carrying member.

Developing apparatus

An intermediate transfer member for transferring a toner image on a carrier which comprises an addition polymerization type silicone rubber. The intermediate transfer member has a marked characteristics of less exudating components such as unreacted components or residual components as compared with prior art products.

Intermediate transfer member for transferring toner image on a carrier

An electrostatic recording apparatus comprising an ion modulator, a driving circuit for transforming a first image signal into a second image signal and for applying said second image signal to the ion modulator, a member for forming electrostatic latent image, and a photon coupled isolator. A voltage of the second image signal is higher than a voltage of the first image signal. The first image signal is supplied to the driving circuit through the photon coupled isolator. The ion modulator is a multilayered ion modulator comprising a layer of insulating material, a continuous layer of conductive material and a segmented layer of conductive material on the other side of said insulating layer. Each segment of the segmented conductive layer is insulatively isolated from each other segment. The multilayered ion modulator has at least one of row of apertures formed therethrough. A segment of the segmented conduction layer is formed around each aperture.

Electrostatic image reproducing apparatus

A copying machine comprising an image signal generating unit including a solid image pickup element for converting an optical image into an electric signal; an ion generating source; and an electrostatic image forming unit including an ion control electrode. The ion control electrode has a control electrode and a common electrode arranged to face each other through an insulating layer and formed with fine openings arranged in a row or in plural adjacent rows. At least one of the electrodes being divided into such a plurality of blocks as has its one or plural openings electrically insulated at a close spacing across the aforementioned arranged openings and as are wired to receive electric signals from the aforementioned image signal generating unit, the common electrode being operative to control the flow of ions, which are directed toward a charge holder, if necessary, together with the control electrode in response to a bias voltage applied. A reference voltage corresponding to the color to be recorded is preset so that the voltage corresponding to the difference between the reference voltage and the signal voltage is applied to the control electrode of the ion control electrode.

Copying apparatus

In a copying machine in which the distance of projection scanning is varied by relative movement between the copy board and the optical system in accordance with the size of the original, indices are provided on the copy board for positioning the original so that the shorter side of the original always corresponds to the direction of scanning. This unification of original placement results not only in a shortening in the distance of the projection scanning but an increase in copying speed.

Copying machine

A recording apparatus in which the coordinates of a portion of an image to be extracted or erased are determined, a scanning position is detected, and an image signal is switched for blocking or allowing the passage of image signals when said predetermined coordinates coincide with said detected position. An extrction means for extracting a portion of a document image or, an erasure device for erasing a portion of a document image, a designating device for designating a portion to be extracted or erased, and a numerical device for introducing the coordinates of the portion to be extracted or erased are provided.

Recording apparatus with editing capability

The present invention relates to a method of fixing a toner image onto a paper bearing said image with the use of a particular toner containing a colorant and a resin wherein the resin contains at least one particular type of polymer which has a Mw/Mn ratio of about 3.5 to 40 wherein the Mn value is between about 2,000 and 30,000.

Toner for developing electrostatic latent images

In a transfer type electrophotographic copying apparatus having a rotatable photosensitive drum for receiving an electrostatic latent image of an original and a heating device comprising a heating roller and a pressure-contact roller rotatable in a condition of pressure-contact with the heating roller for fixing a toner image of the original on a transfer paper moved along a path including a position of image transfer contact with the drum and then between the rollers, the distance from the contact position of the transfer paper with the drum to the pressure-contact point of the heating and pressure-contact rollers being less than the length of the transfer paper as measured in the direction of movement of the paper along the path.

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Hino, Japan

Ryubun Seimiya