Mita Industrial Co., Ltd.

Hisahiro Kato

Hideki Ishida

Kazuhiro Mizude

Tomohiro Tsutano

Masahiro Hashizume

Akinobu Nakahata

Yasuyuki Ishiguro

Hiroshi Inui

Shingo Mori

Michio Uchida

Yasuhiro Matsuo

Yoshinobu Takemura

Kuniaki Nakano

Shinya Kawakami

A device for recovering toner in an image-forming machine includes a cleaning mechanism for removing the toner that remains on an image carrier, a toner conveyer mechanism for conveying the toner removed by said cleaning mechanism, and a toner recovery container for containing the toner conveyed by said toner conveyer mechanism. The toner conveyer mechanism includes a toner conveying pipe connected at its one end to said cleaning mechanism and having, at its other end, a toner discharge port that faces a toner reception port formed in said toner recovery container, a toner conveying member in the form of a coil arranged in said toner conveying pipe and is coupled at its one end to a rotary member, and a toner-scraping member mounted on the other end of said toner conveying member and rotates together with said toner conveying member.

Device for recovering toner in an image-forming machine

Developer unit for an image forming apparatus

An image forming apparatus is provided with a high voltage transformer provided with one common secondary winding for supplying a high voltage power to a main charger and to a transferring charger, a resistor for sensing a shield current of the transferring charger, an error detecting amplifier for controlling a primary side of the high voltage transformer so that the sensed shield current is constant; a constant voltage device connected to a grid of the main charger for constant-voltage controlling the main charger, and a resistor inserted in a current path to the transferring charger for setting a current supplied from the high voltage transformer to the main charger to be greater than a current supplied from the high voltage transformer to the transferring charger.

Image forming apparatus having controller adjusting current to main

An image forming apparatus includes a photosensitive drum driver for rotating a photosensitive drum at either a normal speed or a higher speed, a charger, a charge remover for removing residual charges on the photosensitive drum surface after a toner image is transferred, a starter for instructing a start of image forming operation, and a controller responsive to the starter for controlling the operative parts. Upon the starter being turned on, the controller drives the charger and the charge remover, and permits the photosensitive drum driver to rotate the photosensitive drum at the higher speed, and suspends the image formation, After the photosensitive drum completes the initial one turn, the controller starts the image formation and permits the photosensitive drum driver to rotate the photosensitive drum at the normal speed.

High speed image forming apparatus

An image forming apparatus includes a photosensitive drum rotatable, a developer disposed near the photosensitive drum for developing an electrostatic latent image into a toner image, a transfer disposed on a downstream of the developer for transferring the toner image onto copy paper, and a pre-transfer charger disposed between the developer and the transfer for charging the photosensitive drum at a specified level to assure a smooth transfer of the toner image from the photosensitive drum to the copy paper, the charger including a casing formed with a guide portion for guiding the copy paper to the transfer.

Image forming apparatus provided with pre-transfer charger

For a pre-transfer charging device provided in image processing apparatus for a xerographic image reproducing machine, a bipartite shield is provided, having a shield upper case mounted in an imaging apparatus first frame, and a shield lower case mounted in an imaging apparatus second frame fitted with a guide at least partially defining a sheet conveyance path into an imaging unit of the imaging apparatus. The imaging unit includes a chargeable photoconductor drum and is mounted in the first frame, which is pivotally joined to the second frame. A bottom exterior surface of the shield lower case serves as a guide partially defining a terminal portion of the sheet conveyance path. A discharge wire is fitted in the shield upper case, extending axially within the pre-transfer charging device, and therein is movable integrally with the shield upper case. During maintenance on the imaging apparatus, the first frame is opened off of the second frame. The discharge wire as the frames are separated moves integrally with the shield upper case and is thus exposed for ease of cleaning and other maintenance. The bipartite shield construction accordingly ensures that the accuracy of the relative positions of the parts forming the terminal portion of the sheet conveyance path is not disturbed when the frames are separated for maintenance access.

Bipartite shield for xerographic pre-transfer charging device

When documents fed by an automatic document feeder are subjected to the first copying operation, the documents are counted one by one. Alternately, the total number of documents are calculated by dividing the number of copy paper sheets sent to an intermediate tray, by the preset number of copies. Page entry is made in the copy paper sheets taken out from the intermediate tray, based on the total number of documents thus obtained. The total number of documents may be automatically counted. Accordingly, even though the documents are successively fed, starting from the last-page document, page entry may be made. The operator is not required to manually count the total number of documents.

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Osaka, Japan

Hisahiro Kato