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Ricoh Co., Ltd. Patents
Assignee:
Ricoh Co., Ltd.
Address:
Tokyo, JP
No. of patents:
742
Patents:


1 2 3 4 5 6 7 8 9 10 11 12 13 14 15


Patent Number Title Of Patent Date Issued
5887218 Color image forming apparatus having toner and transfer sheet bearing members and image forming March 23, 1999
An image forming apparatus in which a toner image formed on an image bearing member is first transferred onto an intermediate transfer element and then onto a transfer member. A potential of the image bearing member is detected and a transfer bias voltage applied to the intermediate
5886797 Method and apparatus for controlling a spatial filtering process based on characteristics of ima March 23, 1999
A method and apparatus for controlling a MTF correction process using the reference pixel density and the edge amount of the reference pixel. An edge amount is a result of a high-pass filtering process of the reference pixel data. A pixel density conversion table and an edge amount conve
5884134 Image forming apparatus with a device to increase contact area between a transfer sheet and an i March 16, 1999
An image forming apparatus in which a transfer device is provided in a position separated from an image carrier. A transfer sheet is conveyed along and contacting a part of a circumferential surface of the image carrier facing the transfer device when transferring a toner image from
5876128 Braille printing apparatus March 2, 1999
An apparatus for printing not only embossing braille characters but also an embossing figure on a recording medium such as paper, using a projection of a rod employed as a debossing die and a printing underlay employed as an embossing die. The printing underlay includes at least one elas
5866504 Transparent thermosensitive recording material February 2, 1999
A transparent thermosensitive recording material compriser: (1) transparent substrate, (2) a thermosensitive coloring layer which is formed on one side of the transparent substrate, (3) a protective layer which is formed on the thermosensitive coloring layer and has almost the same refra
5835989 Battery system which prevents current from flowing during a short-circuiting of the battery term November 10, 1998
A rechargeable battery package includes circuitry with a switching device which disconnects the exterior terminals of the battery package from one or more batteries therein. The circuit also includes a device having a diode function which allows the battery or batteries to be charged
5815097 Method and apparatus for spatially embedded coding September 29, 1998
The present invention provides a method and apparatus for compressing and/or decompressing data. In one embodiment, a system comprises a one-pass spatially embedded compressor and a limited bandwidth channel. The compressor comprises image data into compressed image data in one-pass.
5812917 Developing apparatus September 22, 1998
A developing apparatus forms multiple toner layer and stably obtains predetermined toner charging amount and toner layer thickness, and further uniformly supplies the toner onto the toner carrying roller along its entire length. In the developing apparatus, a brush-like toner supplying
5793073 Semiconductor thin film sensor device with (110) plane August 11, 1998
A semiconductor thin film sensor device including a semiconductor body formed of silicon having a (110) plane; a depression formed by an anisotropic etch applied to a first surface of the semiconductor body, wherein the first surface is substantially parallel to the (110) plane; and
5792724 Thermosensitive recording material August 11, 1998
A thermosensitive recording material having high transmittance density, excellent reproducibility of fine dot images and half tone images under printing conditions ranging from low to high applied printing energy.The thermosensitive recording material, including a substrate and a thermos
5788229 Path guide for selectively corrugating an output medium August 4, 1998
A method and an apparatus for corrugating the output of a reproduction device such as a photocopier includes a guiding arm for guiding an image carrying medium in a predetermined path towards a destination output bin and a projection for corrugating the image carrying medium as it is bei
5778276 Image forming apparatus having automatic preliminary scanning start function July 7, 1998
An image forming apparatus having a preliminary scanning function which is automated by detecting a selection of at least one of an automatic color selecting mode and a letter and photo mixed mode, an existence of an original document on a contact glass, and a movement of an original pla
5773385 Thermosensitive recording medium June 30, 1998
A thermosensitive recording medium, having a support, an intermediate layer disposed thereon, and a thermal recording layer disposed on the intermediate layer, with the support being a plastic film or a synthetic paper having a thickness of less than or equal to 150 .mu.m, and the in
5763354 Liner-less thermosensitive recording material having thermosensitive adhesive layer June 9, 1998
A liner-less thermosensitive recording material having a substrate, a thermosensitive coloring layer formed on one side of the substrate, a thermosensitive adhesive layer which is formed on the other side of the substrate and becomes adhesive when activated, while being non-adhesive in
5750893 Thermally sensing type flowing velocity measuring apparatus May 12, 1998
Both of voltage range and supplied power range of a heater can be enlarged, one-sided power source for a driving circuit can be realized easily, power source voltage can be lowered, and flowing velocity can be measured with high accuracy.First reference resistor is connected in series to
5746518 Braille printing apparatus May 5, 1998
An apparatus for printing not only embossing braille characters but also an embossing figure on a recording medium such as paper, using a projection of a rod employed as a debossing die and a printing underlay employed as an embossing die. The printing underlay includes at least one elas
5727248 System for remote diagnosis of image forming apparatuses, including intelligent communications c March 10, 1998
A remote diagnosis apparatus comprising communication control units which store particular data sent from a plurality of copying machines and execute communication control for the data and a controller which is connected via a public line network to the communication control units and
5708457 Video display apparatus and external storage device used therein January 13, 1998
A video display apparatus includes a video data generator which generates video data of a plurality of still picture and a moving picture (graphic data) in an overlaid manner on the basis of still picture patterns, still picture character codes, moving picture character codes and etc.
5692411 Quiet paper sorter using a collision impact reduction means December 2, 1997
The current invention discloses methods and apparatus for quieter sorters. The quieter sorter reduces the collision noises generated by movable pins of the sorter trays and a Geneva wheel which controls the movement of the sorter trays. The movable pins generally receive a force, and the
5666609 Copying machine and method for copying a designated area of an original document September 9, 1997
A copying machine and method for copying a designated area of an original document designates copying start and end positions. A controller controls partial copying in accordance with a first timing sequence corresponding to the copying start position and ends copying in accordance with
5652080 Methods and apparatus to duplicate images on various image carrying media using liquid carrier b July 29, 1997
The current invention discloses methods and devices for duplicating images on image-carrying media of various characteristics using a liquid carrier based developer. The various characteristics of the image-carrying media include absorbency, surface smoothness and coating materials. In o
5646088 Thermosensitive recording material and production process thereof July 8, 1997
A thermosensitive recording material having a high degree of background whiteness, superior light resistance without coloring of the background when exposed to the light, and a method of producing a stable coating liquid or forming a thermosensitive coloring layer and a protective layer
5608424 Moving picture display apparatus and external memory used therefor March 4, 1997
A moving picture display apparatus comprises a main body and an external memory detachably mounted on the main body. The main body of the moving picture display apparatus is provided with a video data memory for storing therein graphic data of characters which constitute objects. A progr
5587723 Display range control apparatus and external storage unit for use therewith December 24, 1996
A display range control apparatus includes an external storage unit in which position data representative of two points in a horizontal direction on a screen of a raster scan monitor are stored in advance together with still picture pattern data and character data. A counter is increment
5576845 Encoding apparatus and method for processing color data in blocks November 19, 1996
The image encoding apparatus and encoding method thereof according to the present invention which encodes a multi-valued (color) image by dividing multi-valued (color) image data to blocks and constituting code data for each block, including the CPU which switches composition of the code
5563403 Method and apparatus for detection of a skew angle of a document image using a regression coeffi October 8, 1996
A method and apparatus for detecting the skew angle of a document image. Skew angle determination is performed by the steps of determining a set of sampling points from an input document image and processing X and Y coordinates of the sampling points in order to calculate a regression
5560614 Video game system having reduced memory needs for a raster scanned display October 1, 1996
A T.V. game system for displaying a desired picture on the screen of a raster scanning type T.V. set includes a motion picture pattern generator, a still picture pattern generator, a central processing unit for controlling the overall operation of the system under the control of the
5545925 Semiconductor device having a metallic silicide layer for improved operational rates August 13, 1996
A polycrystal silicon electrode and a side wall are formed in a method for manufacturing a semiconductor device. Thereafter, air is exhausted from a film forming chamber until a vacuum degree of 4.times.10.sup.-8 Torr. A mixing gas of N.sub.2 and argon (At) is introduced into this chambe
5540328 Containing case for containing a disk-like recording medium July 30, 1996
A slide-type containing case for containing a disk cartridge, compresses: a pair of case pieces joined with each other at respective free end edges thereof, each of said case piece being U-shaped; an opening portion disposed on one side portion of the case pieces, through which the c
5530554 Image forming system with common processor bus architecture June 25, 1996
An image forming apparatus which can perform a number of jobs usually performed by a host computer. The image forming apparatus has a printer and a scanner, and is used with a host computer having a standard bus line provided with an external connection. The image forming apparatus inclu
5517228 Apparatus for displaying a recording medium sheet and printing an image thereon May 14, 1996
An apparatus for displaying a recording medium sheet and for printing an image thereon includes a plurality of sheets each of which is made of an erasable recording medium, a recording unit for recording information on one of the plurality of sheets, a displaying unit for displaying the
5517108 Flip-flop circuit in a scanning test apparatus May 14, 1996
A scanning circuit apparatus for test includes a first selecting circuit for selecting one of a normal data signal and a scanning data signal by a first control signal and for transmitting the selected data signal, a second selecting circuit for selecting one of a normal clock signal and
5515482 Sorting apparatus and method for sorting data in sequence of reference levels indicated by the d May 7, 1996
A sorting apparatus comprises a data memory for storing a plurality of data, each of the data comprising reference data indicating a predetermined reference level, a sorting memory for writing therein data based on the plurality of data and a control unit for sorting the plurality of
5513138 Memory card having a plurality of EEPROM chips April 30, 1996
A data writing operation of a memory card is performed from a first EEPROM chip. Writing commands are given every time data in a memory block unit are completely transferred. Each of four EEPROM chips is performing the writing operation when data of the four EEPROM chips are completely
5512979 System for remote diagnosis of image forming apparatuses, including intelligent communications c April 30, 1996
A remote diagnosis apparatus comprising communication control units which store particular data sent from a plurality of copying machines and execute communication control for the data and a controller which is connected via a public line network to the communication control units and
5512927 Image forming apparatus having a photosensitive drum rotatable at different speeds April 30, 1996
An image forming apparatus which forms on a recording paper a visible image in accordance with image data, the forming being performed by using an electrophotographic method, and the apparatus being able to reduce a total recording time spent for recording one page as compared to the pre
5511173 Programmable logic array and data processing unit using the same April 23, 1996
A programmable logic array includes a plurality of AND planes. Each AND plane executes an AND logic operation and has input terminals and output terminals. The programmable logic array also includes a single OR plane provided in common for the plurality of AND planes. The single OR plane
5509663 Image processing apparatus and external storage unit April 23, 1996
An image processing apparatus includes a CPU which executes a program read from an external storage unit, and a video processor. In the video processor, color data of moving picture characters and color data of still picture characters are respectively outputted from a moving picture dat
5508477 Apparatus for acoustic noise reduction of office automation devices utilizing Helmholtz resonanc April 16, 1996
An acoustic noise reduction apparatus for an office automation device is provided on a surface of an outer shield of the office automation device and has a hole therethrough. The body member of the apparatus defines an internal volume which covers the hole. A control member is operativel
5504557 Electrophotographic-process control apparatus having improved output-image-density control funct April 2, 1996
An electrified portion electric-potential, exposed portion electric-potential, and developing biasing electric-potential are controlled so as to obtain a constant ratio between an input level in exposure to generate the electrostatic latent image and the density associated with the t
5499922 Backing chorus reproducing device in a karaoke device March 19, 1996
A backing chorus reproducing device is disclosed wherein human backing chorus is PCM coded and then combined with MIDI Standard based instrumental sound to produce karaoke music. In reproduction, the instrumental sound and the chorus sound are played back with no out-of-synchronizati
5495266 Still picture display apparatus and external storage device used therein February 27, 1996
A still picture display apparatus displays a still picture in which characters each composed of combination of a predetermined number of dots on a raster scan monitor in accordance with character data and program data both stored in an external storage device in advance. Offset data of
5488599 Optical pick-up device with a multifunctional prism January 30, 1996
The present invention provides an optical pickup device which enables cost reduction and has improved optical characteristics. In the optical pickup device according to the present invention, as a function to shape a light flux outputted from a semiconductor laser chip to a substantially
5483257 Background picture display apparatus and external storage unit used therefor January 9, 1996
A background picture display apparatus includes a microprocessor and an external storage unit, and dot data, character designating data and mode data are programmed in advance in a ROM in the external storage unit. Character designating data constituting background screens designated by
5471440 Magnetooptic apparatus with integrated detecting element providing signal with high S/N ratio November 28, 1995
In an apparatus for recording and reading out magnetooptic information an incident light beam polarized in a predetermined direction is modulated by rotating a plane of polarization in accordance with a recording pattern of a magnetooptic information recording medium utilizing magnetoopt
5465475 Method of forming a thin film magnetic head November 14, 1995
A thin film magnetic head has a lower magnetic pole formed on a substrate; a coil arranged on the lower magnetic pole through an adhesive layer; an upper magnetic pole arranged on the coil; and a gap layer formed between the upper and lower magnetic poles. A method for forming the thin f
5459346 Semiconductor substrate with electrical contact in groove October 17, 1995
A semiconductor substrate comprises a foundation, a semiconductor monocrystalline film formed on the foundation, and a high-melting-point metal film or a high-melting-point metal alloy film disposed in at least part of a region between the semiconductor monocrystalline film and the f
5453570 Karaoke authoring apparatus September 26, 1995
Disclosed is a karaoke authoring apparatus for mixing or authoring karaoke music data based on an electronic music sound source. The invention can analyze chronologically, in a sound reproduction block, the musical performance data expressed by a code such as MIDI code and has a pre-
5418624 Negotiation method and apparatus enabling a facsimile machine to use async data communication pr May 23, 1995
A facsimile machine is provided which can transmit and receive data over asynchronous digital data networks in accordance with an asynchronous protocol. The facsimile machine can provide and receive negotiation information during a data transmission process.
5412413 Method and apparatus for making liquid drop fly to form image by generating bubble in liquid May 2, 1995
A liquid jet recording head includes a base member, a liquid layer maintained on the base member and a plurality of heater elements, arranged in a line on the base member, for supplying energy to liquid adjacent thereto, the energy operation portions being put under the liquid layer. A
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