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81. 发明专利

JPH07306584A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH07306584A
公开(公告)日：1995-11-21
申请号：JP10044294
申请日：1994-05-16
申请人： HITACHI LTD
发明人： OIKAWA AKIKO , SATO TOSHIYA , MIYASAKA TORU
IPC分类号： G03G9/08 , G03G15/08
摘要： PURPOSE:To enable stable image formation through the use of a toner coagulation easy to handle by pulverizing coagulated toner and selecting only toner grains capable of being used for development out of the pulverized toner grains to use the toner for the development. CONSTITUTION:The toner coagulation 8 supplied into a toner coagulation pulverizing chamber 9 by a toner coagulation supplying means 13 is stirred and pulverized by the rotary drive of a comb-shaped rotary body 11. The toner pulverized and restored to a toner grain size before coagulation is supplied toward a developing roll 14 by the comb-shaped rotary body 11. Then, the supplied toner is regulated by a regulating blade 15 and the uniform thin layer of the toner is formed on the developing roll 14. At this time, a lump of toner not pulverized to the grain size for practical use, that is, not sufficiently pulverized is dropped by gravity without passing through the regulating blade 15 and repulverized in a toner coagulation pulverizing chamber 9.

82. 发明专利

JPH0736267A DEVELOPING DEVICE 失效
公开(公告)号：JPH0736267A
公开(公告)日：1995-02-07
申请号：JP18243393
申请日：1993-07-23
申请人： HITACHI LTD
发明人： TOKORO NOBUO , MIYASAKA TORU
IPC分类号： G03G15/08
摘要： PURPOSE:To eliminate the need of keeping a gap for allowing electrified toner to fly up to the electrostatic latent image of an electrostatic latent image carrier with high accuracy, to easily stick the electrified toner to an electrostatic latent image part and to form a stable toner image by scraping/supplying the electrified toner onto the electrostatic latent image carrier and sticking the electrified toner to the electrostatic latent image of the electrostatic latent image carrier with electrostatic force. CONSTITUTION:Toner dropped/supplied from a toner replenishing container 9 is rubbed with an electrifying brush 1, a friction member 27 and a carrying roller 2 and charged by the friction. The electrified toner 13 is electrically stuck to the carrying roller 2 and carried up to a supplying position on the electrostatic latent image carrier 12. The stuck electrified toner forms a toner layer having a constant thickness in the iongitudinal direction of the carrying roller 2, in such a manner that a regulating plate 17 is arranged without contact with the carrying roller 2. A scraping brush 3 is disposed at a place where the electrified toner 13 arrives, so that the electrified toner 13 stuck to the carrying roller 2 is scrapped and then, stuck to the electrostatic latent image of the electrostatic latent image 12, to form the toner image.

83. 发明专利

JPH06258925A DEVELOPING DEVICE 失效
公开(公告)号：JPH06258925A
公开(公告)日：1994-09-16
申请号：JP4093193
申请日：1993-03-02
申请人： HITACHI LTD
发明人： SUZUKI YASUAKI , HONDA TATSUO , MIYASAKA TORU , ONOSE ATSUSHI
IPC分类号： G03G15/08
摘要： PURPOSE:To prolong the life of a developing roller and to prevent torque caused by the friction between a photosensitive body and the roller from being increased by using a comparatively soft non-magnetic substance such as aluminum as the developing roller and bringing it into contact with the photosensitive body with a certain pressure. CONSTITUTION:The photosensitive body 1 is generally obtained by coating the surface of a metallic pipe stock with a photosensitive material. Plotting is executed on the electrified body 1 according to an image signal by a laser beam 11 from an optical unit 10 and developer is made to stick on the plotted part by the developing roller 3. The developer stuck on the surface of the body 1 is transferred on a recording medium passed between a transfer device 7 and the body 1 and an image is formed. Besides, it is thermally fixed by a fixing device 7 and a printing process is finished. The roller 3 is brought into contact with the body 1 by the fixed pressure. Then, it is preferable that the comparatively soft material such as aluminum or copper is used as the material of the roller 3. Besides, it is preferable that the rotating directions thereof are reversed in order to reduce the torque between the body 1 and the roller 3.

84. 发明专利

JPH06110289A METHOD AND DEVICE FOR MULTICOLOR PRINTING ELECTROPHOTOGRAPHIC RECORDING 失效
公开(公告)号：JPH06110289A
公开(公告)日：1994-04-22
申请号：JP19582493
申请日：1993-08-06
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： KUMASAKA TAKAO , SHIMAZAKI YUZURU , MIYASAKA TORU , OTOME YUKIO , TAKUMA YASUO
IPC分类号： G03G15/00 , G03G15/01 , G03G15/02 , G03G15/06 , G03G21/00
摘要： PURPOSE:To prevent color mixing even if a printing speed is increased and to enable multicolor printing with a small-sized device. CONSTITUTION:At least second and subsequent electrostatic charging stages are executed by electrostatic chargers 5 respectively having control electrodes. The relations among a control potential Vg to be impressed to the control electrodes of the electrostatic chargers 5, a target potential V0 after the electrostatic charge of the non-image parts in the electrostatic charging stages and a DC component Vdc of developing biases in respective developing stages are so set as to satisfy ¦V0¦>¦Vdc¦>=¦Vg¦. As a result, the potential Vi after the reelectrostatic charge of the toner image parts can be increased even if the surface potential Vn of the non-image parts is not excessively increased even if sufficient corona current is passed. Consequently, the potential Vi of the toner image parts after the reelectrostatic charge rises higher than the DC component Vdc of the developing bias potential, and therefore, the intrusion of other toners is prevented.

85. 发明专利

JPH0679917A FULL-COLOR IMAGE RECORDING DEVICE 失效
公开(公告)号：JPH0679917A
公开(公告)日：1994-03-22
申请号：JP23384092
申请日：1992-09-01
申请人： HITACHI LTD
发明人： KOBAYASHI SHINYA , MIYASAKA TORU , SATO KUNIO
IPC分类号： B41J2/44 , G03G15/00 , G03G15/01 , G03G15/36 , G03G21/14 , H04N1/23
摘要： PURPOSE:To correct deviation of the position of each color toner image, which periodically occurs at specific places in a recorded image. CONSTITUTION:A full-colored image recording device comprises a transfer drum 1 for carrying a recording paper, and a plurality of single-color electrophotographic processes 2 through 5 for forming each single-colored toner image, wherein the transferred images obtained by the respective processes 2 through 5 are superposed on the recording paper to record thereon a full-color image. In this device, the extent of deviation of the position of each color on the transfer drum 1 is metered for a time corresponding to the least common multiple of various periodical operations in the respective processes 2 through 5. Address offset data on each scanning line are calculated on the basis of the extent of deviation of the positions thus metered, and the calculated results are stored in a memory in advance. When the transfer drum 1 is operated, the address offset data corresponding to each scanning line are read out from the memory to correct addresses that are in both the horizontal and the vertical scanning directions of a pixel on each scanning line.

86. 发明专利

JPH0668226A STILL PICTURE PROCESSOR 失效
公开(公告)号：JPH0668226A
公开(公告)日：1994-03-11
申请号：JP22250792
申请日：1992-08-21
申请人： HITACHI LTD
发明人： MIYASAKA TORU , NAKAMURA KOZO
IPC分类号： B41J3/46 , G03G15/22 , G06T11/80 , H04N1/387 , G06F15/62
摘要： PURPOSE:To provide a still picture processor in which a high precise display equivalent to a print can be attained, and a simple picture data editing function can be provided. CONSTITUTION:This device is equipped with a picture memory 1, printing mechanism 2 which records the content of the picture memory 1 on a recording sheet, and display position 4 which synthesizes the image-recorded recording sheet with an electronic picture information display device 6, and displays it. And also, the device is equipped with an inputting means 5 which inputs a two-dimensional coordinate on the recording sheet, and a means which inputs an editing command, and the picture information in the picture memory is changed based on inputted information from those inputting means. Thus, the electronic information can be edited by using the picture of a display quality equivalent to the print, so that a merit that an operator can be difficult to get tired even in a long time work can be obtained. Moreover, the information and convenience equivalent to the print on the sheet can be obtained by a user, so that the printing on the unnecessary sheet can be reduced, and an effect on a circumstance protection can be obtained.

87. 发明专利

JPH04359146A RESOLUTION OUTPUTTING METHOD FOR ELECTROSTATIC LATENT IMAGE, ELECTROPHOTOGRAPHIC RECORDER AND IMAGE PROCESSING SYSTEM UTILIZING THE SAME 失效
公开(公告)号：JPH04359146A
公开(公告)日：1992-12-11
申请号：JP13400991
申请日：1991-06-05
申请人： HITACHI LTD
发明人： MIYASAKA TORU , UMEDA TAKAO , IKAWA TATSUO
IPC分类号： G01N27/60 , G03G15/00 , G03G15/04 , G03G21/00 , G03G21/16 , H04N1/29
摘要： PURPOSE:To correctly measure the resolution of a photoreceptor itself without developing an electrostatic latent image by outputting the resolution of the photoreceptor itself with the exposure section of the latent image formed on the photoreceptor and the boundary area width of a nonexposure section. CONSTITUTION:The portion where the potential is changed from about 10% to 90% within the potential difference between the potential 2a of an exposure section and the potential 3a of a nonexposure section is the width 4a of a boundary area, the width 4a is inversely proportional to resolution, the width 4a is expanded in relation to the elapsed time (t) after exposure as shown by the equation 4a=A(t/C. R) , where C is the capacity of a photoreceptor, R is the surface resistance, and A is a proportional constant, thus the resolution is obtained when the width 4a is measured. A photoreceptor drum 11 is rotated, electrified and exposed 6, then an eraser lamp 9, an electrifier 5 and an exposing device 6 are stopped in sequence, the drum 11 is rotated while the electrostatic latent image formed on the photoreceptor is held, the boundary area on the photoreceptor is measured 12, and the resolution is calculated 13 from the measured value and elapsed time (t) when the width 4a becomes sufficiently larger than the resolution of an electrometer.

88. 发明专利

JPH0477768A ELECTROSTATIC RECORDER 失效
公开(公告)号：JPH0477768A
公开(公告)日：1992-03-11
申请号：JP19053090
申请日：1990-07-20
申请人： HITACHI KOKI KK , HITACHI LTD
发明人： NAKAZAWA TAKASHI , OSHIMA MINORU , ISHIKAWA MASAMI , OGAWA TSUKASA , UMEDA TAKAO , MIYASAKA TORU
IPC分类号： G03G15/02 , G03G15/00
摘要： PURPOSE:To correct the measured error of potential caused by mechanical level difference between a photosensitive body and a reference potential part and to accurately control the potential of the photosensitive body by providing a circuit which generates the correcting amount of an error and an addition circuit and obtaining such constitution that an error correction signal is added and subtracted to and from a potential detection signal on the circuit. CONSTITUTION:Since the reference potential part 2 and the photosensitive body 3 are discontinuous, the level difference G is generated. A correction circuit consists of an adder 11 being an addition means and a switch 22 being a correction signal generation means. Then, a binary value ds-dse in proportion to a detection error Es-Ese by the level difference G shown by a signal (j) is previously set by the switch and added to binary data des-dp for adding by the adder. The added result becomes the binary value ds-dp in proportion to the difference of the potential Vs-VP like a signal (k) and the effect of the level difference G is corrected.

89. 发明专利

JPH049881A METHOD AND DEVICE FOR RECORDING MULTICOLOR IMAGE 失效
公开(公告)号：JPH049881A
公开(公告)日：1992-01-14
申请号：JP11254990
申请日：1990-04-27
申请人： HITACHI LTD
发明人： MIYASAKA TORU , UMEDA TAKAO
IPC分类号： B41J2/525 , G03G15/00 , G03G15/01
摘要： PURPOSE:To make a useless time that recording is not executed by a recording part the same degree as the recording time of only monochrome that a carrying path is not used by replacing the recording order of image data divided to the monochrome and successively recording the divided image data on a paper carried by the loop-like carrying path based on the replaced recording order. CONSTITUTION:A multiple color image is recorded by carrying the paper 12 to a recording position from a paper supply tray 6, recording the image of first color on the paper 12, returning the paper 12 where the image of the first color is recorded to the recording position again with the aid of the loop-like carrying path, that means, a transfer drum 7 next and superposing the image of the different color from the first color upon the initial image. After such processing is repeated as many times as the number of colors used for recording, the paper is carried to a paper ejection tray 11 and the multicolor recording is finished. Then, by executing the recording on the other paper in a term that the image is not recorded is not recorded on the paper 12, that means, while the paper 12 is returned to the recording position by the carrying part 7, the efficient recording can be executed. Thus, the useless time of the recording part is made the same degree as the recording time of only the monochrome that the loop-like carrying path is not used.

90. 发明专利

JP2004004920A FIXING DEVICE AND ELECTROPHOTOGRAPHIC DEVICE EQUIPPED WITH SAME 审中-公开
公开(公告)号：JP2004004920A
公开(公告)日：2004-01-08
申请号：JP2003195419
申请日：2003-07-11
申请人： HITACHI LTD
发明人： SATO TOSHIYA , OIKAWA AKIKO , MIYASAKA TORU , WAKAMATSU KAZUHIRO , KUMADA KATSUMI , ONOSE KATSUYOSHI
IPC分类号： G03G15/20
摘要： PROBLEM TO BE SOLVED: To realize a fixing device which has neither picture quality irregularity nor image deviation and is small-sized and inexpensive. SOLUTION: A recording medium 8 where an unfixed toner image is formed is mounted with its toner image surface in contact with a heat roller 4 which has a heat-resisting elastic layer on the surface of a metallic mandrel and heated by a heating source 13 while driven by a driving source to rotate; and the elastic layer is made lower than the surface hardness of a peeling roller 2 and allows a fixing belt 1 and peeling roller to be driven while forming a projection nip in such a shape that the recording medium bites into the heating roller where it is pressed against the peeling roller across the recording medium and fixing belt 1. COPYRIGHT: (C)2004,JPO

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