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    • 61. 发明专利
    • COPYING DEVICE
    • JPS5830774A
    • 1983-02-23
    • JP12852981
    • 1981-08-17
    • MATSUSHITA ELECTRIC IND CO LTD
    • SAKAI YUKIOOONISHI HAJIMEKURAMOTO AKIMASA
    • G03G15/14G03G15/00G03G15/16
    • PURPOSE:To improve the separating capacity of a transfer paper, by discriminating the density of a picture by the current value of a developing bias power source to change the voltage of a high voltage power source applied to a separating charger. CONSTITUTION:The current flowed to a developing bias power source 8 is detected by a resistance R to discharge a capacitor C through a switch SW1 by a voltage-current converting circuit 14. Simultaneously, a charging circuit 15 is operated, and the capacitor is charged through a switch SW1', and a potential VC due to the charge of the capacitor C becomes a value related to the constant of the voltage-current converting circuit 14 or the like, and the voltage VC of the capacitor is changed by a developing bias current (i). A voltage VH of a variable voltage power source 16 is changed in accordance with this voltage VC' and the high voltage VH of the output of the variable high voltage power source 16 is lowered to a voltage VHO when the leading edge of a paper 9 is separated, and the paper 9 is separated by its own weight thereafter.
    • 62. 发明专利
    • Electrophotographic device
    • 电子照相设备
    • JPS5738478A
    • 1982-03-03
    • JP11457580
    • 1980-08-19
    • Matsushita Electric Ind Co Ltd
    • KURAMOTO AKIMASASAKAI YUKIOOONISHI HAJIME
    • G03G21/00G03G15/047
    • G03G15/047
    • PURPOSE:To reduce the generation of heat and realize a compact structure and operation stability for a long period, by using an LED to a spark arrester, a front exposure device and a partial exposure device respectively that perform an entire surface exposure or a partial exposure. CONSTITUTION:The red LEDs having, for example, 660-700nm wavelength are arranged to a front exposure device 2 that performs an entire surface exposure of a photoreceptor 1. Then the green LED having 560nm wavelength is arranged to a spark arrester 10 that reduces the residual potential on the surface of the photoreceptor 1 over the entire surface and averages the potential. In case when the surface of the photoreceptor 1 is exposed partially, the unexposed areas are exposed by a partial exposure device 11 consisting of said green LED. As a result, the generation of heat that gives an evil effect to the characteristic of the photoreceptor can be reduced, and at the same time a compact structure is attained for an electrophotographic device with a stable operation secured for a long period.
    • 目的:为了减少热量的产生,长时间实现紧凑的结构和操作稳定性,通过将LED用于分别进行整个表面曝光或部分曝光的火花塞,前曝光装置和部分曝光装置 。 构成:具有例如660-700nm波长的红色LED被布置在执行感光体1的整个表面曝光的前曝光装置2上。然后将具有560nm波长的绿色LED布置在放电器10上, 在整个表面上的感光体1的表面上的残留电位并且使电位平均化。 在感光体1的表面部分曝光的情况下,未曝光区域被由所述绿色LED构成的部分曝光装置11曝光。 结果,可以减少对感光体的特性产生不利影响的热量的产生,同时对长时间保证稳定的操作的电子照相设备实现了紧凑的结构。
    • 67. 发明专利
    • COLOR COPYING DEVICE
    • JPH01150171A
    • 1989-06-13
    • JP30988387
    • 1987-12-08
    • MATSUSHITA ELECTRIC IND CO LTD
    • KURAMOTO AKIMASANAKAMURA MASAHIKO
    • G03G15/01G03G21/00G03G21/08
    • PURPOSE:To prevent a toner from being splashed and to stably perform the electrification of a photosensitive material even at a high temperature by performing light static elimination after performing the electrification, exposure, and development on the photosensitive material at least for three cycles. CONSTITUTION:The photosensitive material is electrified by an electrifier 2, and the exposure is performed on an image part by a laser beam 3, and the development is performed by a black toner that is a first color by a developing device 4. In a second cycle, the photosensitive material is electrified by the electrifier 2, and after exposure 3, the development by a yellow toner that is a second color is performed by a developing device 5. Similarly, in a third cycle, the development by a magenta toner is performed by a developing device 6, and in a fourth cycle, the development by a cyan toner is performed by a developing device 7. The toners of four colors superposed on the photosensitive material are transferred comprehensively on a sheet of transfer paper sandwiched between a transfer device 8 and the photosensitive material. After the toner on the photosensitive material is transferred, the light static elimination of the photosensitive material is performed by a light static eliminator 10, therefore, the toner attached on an electrification part is prevented from being splashed on a non-electrification part on which the light static elimination is applied. Thereby, a color image without generating color mixture can be obtained.
    • 68. 发明专利
    • COLOR COPYING DEVICE
    • JPS62171277A
    • 1987-07-28
    • JP1118186
    • 1986-01-23
    • MATSUSHITA ELECTRIC IND CO LTD
    • KURAMOTO AKIMASA
    • G03G15/01H04N1/46H04N1/48
    • PURPOSE:To obtain a sharp black picture without mixed color with less power consumption by using two image sensors, projecting an infrared light to one sensor among reflected lights from an original so as to obtain a signal for a black picture only, projecting a visual light to the other sensor so as to obtain a signal and synthesizing the said signal after being inverted. CONSTITUTION:An original 1 is scanned by a halogen lamp 2 and a mirror 3. The mirror 4 is a dichroic mirror reflecting an infrared ray and transmitting a visual light and the reflected infrared ray is formed to the sensor 6. Although the sensor 6 cannot identify the white background and a color character among the black and color characters on the original printed on the white background since the print ink absorbs the infrared ray, only the back character remains in the picture of the sensor 6 by the reflected infrared ray. The visual light transmitted through the mirror 4 is formed on the sensor 7 as the cyanide and black picture by the lens 5 and the red filter 8. The output signal of the sensor 6 is inverted by an inverting circuit 10 and synthesized onto the output signal of the sensor 7 and only the cyanide signal is inputted to an optical printer 9. Similarly, the black character picture not being a mixed color is obtained by using a green/blue filter 8.
    • 69. 发明专利
    • COLOR COPYING DEVICE
    • JPS62153968A
    • 1987-07-08
    • JP29670985
    • 1985-12-27
    • MATSUSHITA ELECTRIC IND CO LTD
    • KURAMOTO AKIMASA
    • G03G15/01
    • PURPOSE:To obtain a clear black picture image by obtaining signals of color and black picture in a colored original from an image sensor, exposing a photosensitive body by the signals, and making non-contact reversal developing by color toner. CONSTITUTION:Infrared ray from a colored original 1 is irradiated on an image sensor 7 or a photosensitive body 16. After developing only black image in the colored original of the photosensitive body by a black toner, the photosensitive body is charged again, and color separated visible light from the colored original is irradiated on the image sensor, and signals of color and black image in the colored original are obtained from the image sensor. The photosensitive body is exposed by the signals and non-contact reversal developing is made by color toner. Thereby, the color image and black image in the colored original can be developed separately. Thus, the black image goes to clear instead of being a compound color.
    • 70. 发明专利
    • COLOR COPYING DEVICE
    • JPS62111266A
    • 1987-05-22
    • JP25132985
    • 1985-11-08
    • MATSUSHITA ELECTRIC IND CO LTD
    • KURAMOTO AKIMASAKITAICHI SATOSHITACHIKAWA MASAICHIRO
    • G03G15/01G03G21/00G03G21/08
    • PURPOSE:To reduce the quantity of light of a lamp to reduce the power consumption and develop black characters with only a black developing machine to prevent color mixture be erasing a part of a latent image of a color original, which is formed on the surface of a photosensitive body in a color copying device, by the light of an optical printer due to the signal of the color original. CONSTITUTION:Though an image sensor 10 cannot distinguish the white ground and color characters, infrared rays are not reflected on black characters because coloring matters of a print ink of black characters absorb infrared rays. Consequently, color images are erased on the image sensor 10 and only a black image remains there with respect to infrared rays reflected from a mirror 4. The image of the original is formed on the surface of a photosensitive body 12 with visible rays by a lens 5, and an optical printer 11 is operated by the signal from the image sensor 10, namely, the signal which turns on the printer for parts other than black characters, and parts of color characters and the white ground are irradiated with light. Thus, the latent image of only black character parts remains and is developed by a black developing machine and is transferred to a transfer paper.