| Patent Number |
Title Of Patent |
Date Issued |
| 5200779 |
Image forming apparatus with maintenance procedure |
April 6, 1993 |
| A copying machine including an image forming section, a control unit, and memory means. The control unit has a memory storing data for controlling the image forming section. The memory means stores maintenance data which is generated every time said image forming means is operated and wh |
| 4951091 |
Image forming apparatus having toner quantity detection means |
August 21, 1990 |
| An image forming apparatus includes a main charger and an exposure unit for forming an electrostatic latent image on a photosensitive drum, a developing unit for developing the latent image, a resupply unit for resupplying the developing unit with toner, an auto-toner sensor for dete |
| 4835588 |
Transistor |
May 30, 1989 |
| In a transistor wherein a plurality of emitter regions are formed in a base region, resistor regions which have the opposite conductivity type to the conductivity type of the emitter regions and which act as stabilizing resistors, are formed in the emitter regions. The resistors regions |
| 4812876 |
Motor control device for a copying machine |
March 14, 1989 |
| A motor control device for a copying apparatus which is so arranged as to individually control the motors for driving the movable components of the copying apparatus and is provided with a ten-key board designed to set a test mode and designate a motor to be tested. A test mode is set wh |
| 4561762 |
Image forming apparatus |
December 31, 1985 |
| Disclosed is a copying apparatus which comprises a rotatable photoconductive drum, a charger unit for charging the drum, an exposure unit for exposing the charged drum in accordance with a document pattern, a developer unit for developing a latent image obtained by the exposure as a |
| 4561758 |
Copying apparatus with focus-adjusting mechanism |
December 31, 1985 |
| A copying machine includes: a rotatable photoconductive drum and an optical assembly, having optical elements, for optically scanning a paper document, and forming an optical image corresponding to an optical document image on a photoconductive drum surface. The optical assembly incl |
| 4555653 |
Pulse motor driving apparatus |
November 26, 1985 |
| A pulse motor driving apparatus has a drive circuit for supplying driving pulses to a pulse motor. This drive circuit switches over the exciting winding phases of the pulse motor on a two-phase unit basis, in response to the exciting phase data supplied by a microprocessor in the driving |
| 4518900 |
Pulse motor driving apparatus |
May 21, 1985 |
| A pulse motor driving apparatus is comprised of a timer circuit generating a slue-up pulse and a normal operation pulse, latch circuits latching a phase designating signal in synchronization with the slue-up pulse and normal operation pulse of the timer circuit, and driving circuits driv |
| 4512565 |
Sorter |
April 23, 1985 |
| Disclosed is a sorter which has a controller for receiving a reset signal generated by a copying machine main body and for positioning sort bins in a sort home position in response to the reset signal. |
| 4502776 |
Sorting device for use with a document reproduction machine |
March 5, 1985 |
| A sorting device for use with the document reproduction machine according to the present invention is constructed so that each of the sorting bins for stacking sorted copies is successively moved upward or downward with respect to the discharge port of the machine to directly receive eac |
| 4370670 |
Transistor with plural parallel units |
January 25, 1983 |
| This invention discloses a structure of a transistor suitable for high frequency and high output power. An emitter region having a first conductivity type is formed in a base region having opposite conductivity type in contact with a collector region having the first conductivity typ |
| 4157561 |
High power transistor |
June 5, 1979 |
| This invention relates to a high power bipolar transistor comprising a collector region, a base region formed in the collector region and emitter regions formed in the base region, with each of the emitter regions being a closed loop at the surface of the base region. The emitter electro |
| 4151542 |
Transistor |
April 24, 1979 |
| A transistor which has a plurality of ring emitter transistor units formed on a common semiconductor substrate having one conductivity type, each ring emitter transistor unit being provided with a base region of the opposite conductivity type from the semiconductor substrate and formed o |
