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1. 发明专利

JPS55149983A CRT DISPLAY SYSTEM 失效
公开(公告)号：JPS55149983A
公开(公告)日：1980-11-21
申请号：JP5767579
申请日：1979-05-11
申请人： RICOH KK
发明人： HIRATA TOSHIHISA
IPC分类号： G09G5/08 , G09G1/06

2. 发明专利

JPS5583078A RECORDER 失效
公开(公告)号：JPS5583078A
公开(公告)日：1980-06-23
申请号：JP15662978
申请日：1978-12-17
申请人： RICOH KK
发明人： HIRATA TOSHIHISA
IPC分类号： G03B27/32 , B41J2/44 , G03G15/04 , G03G15/22
摘要： PURPOSE:To let recording operation be effected in an optimum state by automatically adjusting the relative relations of photoreceptor surface potentials with video signal levels. CONSTITUTION:When charging voltage is set, the first reference video signal is read out from an ROM 13c, is latched in an I/O port 13a, and is applied to a D/A converter 18, the video signal having been D-A converted by which is then applied to a cathode ray tube 4 having been amplified and polygon-corrected by way of an input amplifier 2, polygonal function generator 11 and video amplifier 3. The light emitted therefrom is projected to the photoreceptor. As a result of this, the surface charges having beforehand been charged and held on the photoreceptor partly discharge and the rest are held as residual charges and therefore the surface potential generated from this is detected by a detecting electrode 14a and detecting circuit 14b. The attenuation component of the surface potential and the ideal potential attenuation voltage obtainable by the first reference video signal level are compared and the generator 11 is controlled in the direction of eliminating said difference. Thereby, the recording operation may be effected in an optimum state.

3. 发明专利

JPS5565974A CATHODE RAY TUBE EXPOSURE TYPE RECORDER 失效
公开(公告)号：JPS5565974A
公开(公告)日：1980-05-17
申请号：JP13968378
申请日：1978-11-13
申请人： RICOH KK
发明人： KATOU TOSHIBUMI , HIRATA TOSHIHISA , EBI YUTAKA , KAWAKUBO TOSHIO
IPC分类号： G03B27/32 , B41J2/44 , G03G15/04
摘要： PURPOSE:To provide the device which immediately detects paper feed miss when it occurs by providing a transfer paper detecting means in the transfer paper carrying-in path to transfer part and disabling the cathode ray tube for exposure with the transfer paper absence signal thereof. CONSTITUTION:A charging part 2, cathode ray tube 3, developing part 4, transfer part 5 and cleaning part 6 are disposed around a photosensitive drum 1 and paper is fed from a cassette 7 by means of a paper feed roller 8 and resist rollers 9. A detector 10 for transfer paper consisting of a light emitting element and a photo detector is provided immediate before the resist rollers 9 and the output end of said detector 10 is connected to a control circuit 11 which controls the operation of the cathode ray tube 3. When there is no transfer paper immediate before the resist rollers 9, the control circuit 11 disables the cathode ray tube 3 and at the same time it emits the signal for holding the information so that the information having been read in a buffer memory does not erase, thereby preventing the annihilation of the information.

4. 发明专利

JPS5550278A WET TYPE DEVELOPING APPARATUS 失效
公开(公告)号：JPS5550278A
公开(公告)日：1980-04-11
申请号：JP12432078
申请日：1978-10-07
申请人： RICOH KK
发明人： EBI YUTAKA , HIRATA TOSHIHISA , KAWAKUBO TOSHIO , KATOU TOSHIBUMI
IPC分类号： G03G15/10
摘要： PURPOSE:To achieve maintenance of always constant developing density and achieve the copied images of high density by surely feeding the developing solution to the surface to be developed by means of a pair of wave forming means which rotate mutually inwardly in the developing solution. CONSTITUTION:When a pair of vane wheels 3 in the developing solution provided near the surface of a photosensitive drum 1 start mutually inward revolutions, the waves going toward the center from the right and left are formed on the developing solution surface opposing to the photosensitive drum 1. On the other hand, stirring flow is produced in the bottom of a developing solution tank 2 to prevent the precipitation of the toner and send the solution to the right and left circulators 4. The long developing solution contact surface W along the moving direction of the surface of the photosensitive drum 1 is formed in said surface, by which the developing solution is able to receive sufficient supply of the toner. The developing solution is maintained always at a constant density by the wave forming means and circulating means, thus the copied images having high developing density may be obtained.

5. 发明专利

JPS5538577A WET TYPE DEVELOPING DEVICE 失效
公开(公告)号：JPS5538577A
公开(公告)日：1980-03-18
申请号：JP11262478
申请日：1978-09-13
申请人： RICOH KK
发明人： HIRATA TOSHIHISA , EBI YUTAKA , KAWAKUBO TOSHIO , KATOU TOSHIBUMI
IPC分类号： G03G15/10
摘要： PURPOSE:To avert the decrease in developing solution pressure onto the surface to be developed and avert the fatigue of the developing solution by supplying the developing solution onto a developing electrode by way of a solution storing means for unifying the flow of the developing solution. CONSTITUTION:The developing solution sent out by a liquid feed pump passes through the inside of a liquid feed pipe 3 and is discharged into a liquid chamber 2. The greater part of the initial acting force of the solution having been discharged is consumed in the agitating action of the solution to itself and direction change in the liquid chamber 2 and the solution spouted onto a developing electrode 1 through a communicating part 4 does not have such dynamical acting force as the one which strips off the toner particles adsorbed on the photoreceptor surface, thus it turns out that the toner particles are evenly supplied within the electrophoresis region of the photoreceptor surface by static pressure and some dynamic pressure. Hence, if the inside volume and shape of the liquid chamber 2 and the sectional area, liquid feed rate, etc. of the communicating part are suitably set, the developing solution feed mode to the photoreceptor surface may be unified accoeding to the required image densities of the electrostatic latent images and developing speeds.

6. 发明专利

JPS53135636A IMAGE READ DEVICE AND DOUBLEEFACED COPIER 失效
公开(公告)号：JPS53135636A
公开(公告)日：1978-11-27
申请号：JP5026177
申请日：1977-04-30
申请人： RICOH KK
发明人： KATOU TOSHIBUMI , HIRATA TOSHIHISA
IPC分类号： G03G15/00 , G03G15/22 , G03G21/00
摘要： PURPOSE:To simplify the device and carry out a high speed read and a high speed copying by reading the image element on both faces of an original document, and scanning in the same direction as this scanning in order to copy the double-faced copying.

7. 发明专利

JPS53104242A RECORDER 失效
公开(公告)号：JPS53104242A
公开(公告)日：1978-09-11
申请号：JP1945377
申请日：1977-02-24
申请人： RICOH KK
发明人： EBI YUTAKA , TOMITA SATORU , KATOU TOSHIBUMI , YASUDA YUUJI , HIRATA TOSHIHISA
IPC分类号： G03B27/32 , B41J2/44 , G03G15/00 , G03G15/04 , G03G15/22
摘要： PURPOSE:To facilitate the setting of distance between face plate and surface of photosensitive body in order to maintain a constant distance by providing elastic spacers at the outside of both ends of optical fiber in order to bring them into contact with the surface of the photosensitive body.

8. 发明专利

JPS54124741A RECORDER 失效
公开(公告)号：JPS54124741A
公开(公告)日：1979-09-27
申请号：JP3219978
申请日：1978-03-20
申请人： RICOH KK
发明人： HIRATA TOSHIHISA
IPC分类号： G03B27/32 , B41J2/44 , G03G15/04 , G03G15/047
摘要： PURPOSE:To enable recording and erasing of signals to be performed respectively well and eliminate the need for incandescent lamps and power sources etc. for the same by respectively using such phosphor layers which emit light of wavelength bands suited for recording and erasing of the signals. CONSTITUTION:A cathode ray tube 2 is formed separately with the phosphor layer F1 capable of emitting light of the wavelength band suited for recording of signals and the phosphor layer F2 capable of emitting light of the wavelength band suited to erasing, on inside plane of its face plate 2a. In recording operation of signals, the phosphor F1 is subjected to main scanning by the electron beam having been intensity modulated by the signal to be recorded, whereby exposure is accomplished by the light of the wavelength band suited for recording and well recording operation is accomplished. In erasing operation, the phosphor layer F2 is subjected to main scanning by the electron beam, whereby the exposure is accomplished by the light of the wavelength band suited for erasing, thus the space charges having been trapped in the material layer having internal photoelectric effect may be well erased.

9. 发明专利

JPS5488175A BEAM WIDTH MEASURING APPARATUS 失效
公开(公告)号：JPS5488175A
公开(公告)日：1979-07-13
申请号：JP15696977
申请日：1977-12-26
申请人： RICOH KK
发明人： HIRATA TOSHIHISA , EBI YUTAKA , KATOU TOSHIBUMI
IPC分类号： G01J1/42
摘要： PURPOSE:To measure beam width by normalizing the output signal of a photo detector then outputing the signal of only the section where this normalized output signal has become above a certain fixed level. CONSTITUTION:Peak value of the signal is detected with a normalizing circuit 10 so that the value of its peak becomes a certain fixed level. The output signal H of the normalizing circuit 10 is inputted to a level comparator 11 and when the value of the output signal H is above the value having been set with a level setter 12, a level comparator 11 generates a signal. The output signal 1 from the level comparator 11 is inputted to a circuit 13 to obtain AND with the clock signal E and the clock number thereof is counted. The output from an encoder 15 and the signal which has counted the clock signal E are inputted to a multiplier-divider 16, which then makes operation of these values and displays the results.

10. 发明专利

JPS5430041A RECORDER 失效
公开(公告)号：JPS5430041A
公开(公告)日：1979-03-06
申请号：JP9626977
申请日：1977-08-10
申请人： RICOH KK
发明人： KATOU TOSHIBUMI , HIRATA TOSHIHISA , EBI YUTAKA , KATOU SABUROU
IPC分类号： G03B27/32 , B41J2/44 , G03G15/04 , G03G15/22
摘要： PURPOSE:To make it possible to accurately and promptly effect the alignment between a cathode ray tube and a condensing optical transmitter by interposing a spacer of a preset thickness between the two.

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