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11. 发明专利

JPH0359663A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH0359663A
公开(公告)日：1991-03-14
申请号：JP19562789
申请日：1989-07-28
申请人： CANON KK
发明人： MATSUMOTO KENICHI
IPC分类号： G03D13/00
摘要： PURPOSE:To improve reliability in storing an image forming body and in inserting it into a device under a simple constitution by housing a photoseneitive body in a cassette vessel which is shielded from external light before exposure for image formation. CONSTITUTION:A cassette 1 shielded from external light employs paying sheets 101 sandwiching the image forming bodies. By pulling out the sheets 101, the image forming bodies 11 are ejected out of the cassette 1, and the sheets 101 are fed one by one in order. Consequently, the paying sheets 101 are always out of the cassette 1, whereby a complicated constitution is not needed to eject the image forming bodies 11 from the cassette 1. In addition, a place 103 alone where the sheets 101 come out is light-shielded 104. Thus, the device is simpli fied, and reliability in light shielding and conveyance is enhanced.

12. 发明专利

JPH0355245A IMAGE FORMING APPARATUS 失效
公开(公告)号：JPH0355245A
公开(公告)日：1991-03-11
申请号：JP19110489
申请日：1989-07-24
申请人： CANON KK
发明人： MATSUMOTO KENICHI
IPC分类号： B41F31/00 , B41F7/02 , B41M1/00
摘要： PURPOSE:To simultaneously apply to a recording peripheral device of a computer, etc., while maintaining printability by providing means for preventing leakage from an either end of a pair of conductive members at the time of application of a voltage. CONSTITUTION:An ink carrying roll 1 has a cylindrical shape, is a member rotating in a direction of an arrow A, and has conductive silicone rubber coating its (cylindrical) surface. Further, both ends of the roll 1 are cut in an arcuate shape. This is because, when the roll 1 and a plate 5 are electrically conducted therebetween, both ends if the roll 1 are brought into contact stronger than at the center, and when they are used for a long period, there is a danger of leakage from both ends. Thus, both the ends are cut to prevent leakage. In this manner, a printed matter of an image of high quality is obtained while maintaining adhesive properties of the ink with the plate.

13. 发明专利

JPH0351174A DISPLAY APPARATUS AND METHOD 失效
公开(公告)号：JPH0351174A
公开(公告)日：1991-03-05
申请号：JP18610089
申请日：1989-07-20
申请人： CANON KK
发明人： KAI TAKASHI , ARAHARA KOZO , YUASA TOSHIYA , KOBAYASHI MOTOKAZU , TOYAMA JO , MATSUMOTO KENICHI , FUKUMOTO HIROSHI
IPC分类号： B41M1/00 , G09F9/00
摘要： PURPOSE:To perform the writing and erasure of a stationary image and to dispense with the application of voltage after writing by applying ink to a substrate while voltage is applied to the ink corresponding to a display signal by both electrodes to form a display image. CONSTITUTION:Ink 6 characterized by that electrolysis is generated by the application of voltage and gas is generated on a cathode side and adhered to an anode but not to a cathode is used. While an ink coating roll 3 coated with ink is moved on electrodes 2 subjected to patterning in a stripe form, positive voltage is applied to the electrode at a position where the ink is desired to be bonded and negative voltage is applied to the electrode at a position where the ink is not desired to be bonded from a power supply 8 by switching due to a driver 1. When an image is erased, the stripe electrodes are set to cathodes and the ink coating roll 3 is set to an anode and the roll 3 is moved on the electrodes and the ink 6 is moved from the electrodes to the roll. By this method, the writing, display and erasure of an image can be easily performed in low cost and a stationary image stable for a long time is displayed.

14. 发明专利

JPH02286387A IMAGE FORMATION 失效
公开(公告)号：JPH02286387A
公开(公告)日：1990-11-26
申请号：JP10773189
申请日：1989-04-28
申请人： CANON KK
发明人： YUASA TOSHIYA , FUKUMOTO HIROSHI , MATSUMOTO KENICHI , ARAHARA KOZO , KAI TAKASHI , KOBAYASHI MOTOKAZU , TOYAMA JO
IPC分类号： B41J29/377 , B41J2/385 , B41M5/00
摘要： PURPOSE:To safely perform printing in large quantities and to simplify the structure of a recording apparatus by reacting the gas generated from ink at the time of the application of voltage with olefinic substance between electrodes to suppress the discharge of the gas. CONSTITUTION:In an ink image forming stage, when voltage is applied between an ink support roll 1 and a plate 4, ink 2 changes in its adhesive properties to be transferred to the plate 4 and, at the same time, the components in the ink generate electrochemical reaction to generate gas. When voltage is applied between a plate 3 having no adhesiveness to olefinic substance and the ink support roll 1, the water contained in the ink is subjected to electrolysis to generate hydrogen gas which is, in turn, diffused into air to generate the danger of explosion and poisoning. Herein, since the hydrogen gas is reacted with the olefinic substance, the gas is absorbed by the olefinic substance before scattered to the outside and the discharge of the gas can be prevented substantially and danger can be avoided. The olefinic substance is uniformly applied to the surface of the plate 4 by a porous roll 11 impregnated with the olefinic substance.

15. 发明专利

JPH02282761A METHOD AND DEVICE FOR PRINTING 失效
公开(公告)号：JPH02282761A
公开(公告)日：1990-11-20
申请号：JP10336089
申请日：1989-04-25
申请人： CANON KK
发明人： KOBAYASHI MOTOKAZU , ARAHARA KOZO , KAI TAKASHI , YUASA TOSHIYA , FUKUMOTO HIROSHI , MATSUMOTO KENICHI , TOYAMA JO
IPC分类号： G03G15/05 , B41M1/42 , G03G15/00
摘要： PURPOSE:To prevent the remaining of transfer by impressing voltage between a blanket cylinder and a body to be recorded and transferring a recording material from the blanket cylinder to the body to be recorded while changing the adhesive strength of the recording material. CONSTITUTION:The ink image on a plate 4 is transferred to the blanket cylinder 5 rotating in an arrow C direction while maintaining a pressurized contact with the plate. Further, the voltage is impressed between the blanket cylinder 5 and the conductive body 7 to be recorded (conductive paper, metallic foil, metallic sheet) to change the adhesive strength of the ink images on the blanket cylinder 5, by which the ink image 8 is transferred onto the body 7 to be recorded. The transfer efficiency is improved in this way and the remaining of the transfer on the conductive paper, metallic foil and metallic sheet is obviated. The sharp image having excellent environmental stability is thus formed.

16. 发明专利

JPH02269373A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH02269373A
公开(公告)日：1990-11-02
申请号：JP9109889
申请日：1989-04-11
申请人： CANON KK
发明人： MATSUMOTO KENICHI
IPC分类号： G03G15/01
摘要： PURPOSE:To obtain uniform transferability by successively making the average electrostatic charging quantity of toner particles smaller according to order that transfer is repetitively performed. CONSTITUTION:In a conveyance process, the average electrostatic charging quantity of the toner particles is successively made smaller according to order that a transfer paper passes respective transfer parts 4a-4d in respective image forming parts Pa-Pd and the transfer is repetitively performed to the paper. Since the average electrostatic charging quantity of the transferred toner particles gets smaller, the transferability of the toner in each transfer is made uniform with the same transfer current even if the electrostatic charging to a conveying means 8 is increased every time the transfer is repetitively performed, thereby obtaining the high definition image of good quality.

17. 发明专利

JPH02168287A PICTURE FORMING DEVICE 失效
公开(公告)号：JPH02168287A
公开(公告)日：1990-06-28
申请号：JP32203688
申请日：1988-12-22
申请人： CANON KK
发明人： MATSUMOTO KENICHI
IPC分类号： G03G15/01 , G03G15/16
摘要： PURPOSE:To uniformly destaticize a transfer material carrying means and electrostatically attract transfer material to the carrying means at the same time by connecting a DC power source to AC power sources in series and controlling a DC voltage in response to a change in humidity of the atmosphere. CONSTITUTION:The device is provided with a 1st electrifying means 59 electrifying the transfer material carrying means 8 to electrostatically attract the transfer material 6 to the transfer material carrying means 8, and a 2nd electrifying means 62 electrifying the transfer material 6. To apply an AC voltage, the AC power sources 80 and 81 are connected to the 1st and 2nd electrifying means 59 and 62, respectively, and the DC power source 82 is connected to the AC power sources in series so that a DC voltage superposed with an AC voltage is applied to either the 1st electrifying means 59 or the 2nd electrifying means 62. Then, the DC power source 82 is controlled so that the DC voltage is changed and controlled in response to a change in the humidity of the atmosphere. Consequently, the uniform destaticization of the transfer material carrying means and the electrostatic attraction of the transfer material to the carrying means can be performed concurrently.

18. 发明专利

JPH0228687A CLEANING DEVICE OF IMAGE FORMING DEVICE 失效
公开(公告)号：JPH0228687A
公开(公告)日：1990-01-30
申请号：JP17803088
申请日：1988-07-19
申请人： CANON KK
发明人： MATSUMOTO KENICHI
IPC分类号： G03G21/10 , G03G21/00
摘要： PURPOSE:To always carry out fine cleaning by disposing thin sheets formed of material whose coefficient of friction with respect to an image carrier is smaller than a cleaning blade at least near the end part of edge abutting on the image carrier of the cleaning blade. CONSTITUTION:Thin sheets 12 and 12 are respectively disposed on non-image areas a and a' to cover the edge C of a blade 11 which press-contacts to image carrier. These sheets 12 are formed of 'Alfex(R) film in band-shaped and previ ously folded. After this, they are fit to the blade edge C and their edges b and b' are heat-sealedly fit but they are not bonded to the blade edge C. Conse quently, the coefficient of friction at the non-image areas a and a' is smaller than that at the edge of the blade 11. Thus, the burr of the both edges of the cleaning blade 10 can be prevented and fine cleaning can be always carried out. Thus, by considerably simple constitution, the coefficient of friction with respect to the image carrier of the blade edge can be positionally changed, and especially, the burr of the blade at the edge of the blade, cleaning defect, and occurrence of filming can be prevented and fine cleaning can be carried out.

19. 发明专利

JPH01168454A COLOR CONVERTING METHOD 失效
公开(公告)号：JPH01168454A
公开(公告)日：1989-07-03
申请号：JP32823787
申请日：1987-12-24
申请人： CANON KK
发明人： MITSUTAKE HIDEAKI , KADOWAKI HIDEJIRO , DOI TAKESHI , HOSAKA AKIHITO , MATSUMOTO KENICHI
IPC分类号： B41J2/21 , B41J2/525 , G06F3/12 , G06K15/00 , H04N1/46 , H04N1/60
摘要： PURPOSE:To simply grasp the relationship between the quantity of ink and chromaticity value and to enlarge the extensibility of a color process by employing as a parameter a chromaticity value corresponding to the maximum value of the quantity of the ink and a chromaticity value due to the mixture of a plurality of inks. CONSTITUTION:Necessary parameters include a chromaticity value of the mixed color of C, M, Y, R, G, B corresponding to the chromaticity value maximum density value of an image carrier and chromaticity values when Bk (black) of the maximum density value is applied thereto. When the chromaticity values of the 14 colors are applied as color conversion parameters, the quantity of the ink to be output to the input chromaticity value is determined. For example, when with the chromaticity value of reference color patches 125 colors as input signals the chromaticity value of the color patch output from an image output unit is compared with the input signal value, color difference of approximately mean 3-4 is observed. When a conventional method is applied, the color difference of approximately mean 5-6 is observed. Thus, if the mean color difference is used as a criterion in both the methods, its propriety is not so large, but since the correlation between the quantity of the ink and the chromaticity value in a mean color space is directly used for the conversion method, an effective method is realized instead of an under-color removal and black extraction as the use of black toner.

20. 发明专利

JPS6413172A TONER CONCENTRATION CONTROL METHOD 失效
公开(公告)号：JPS6413172A
公开(公告)日：1989-01-18
申请号：JP16791987
申请日：1987-07-07
申请人： CANON KK
发明人： HOSAKA AKIHITO , MATSUMOTO KENICHI , KADOWAKI HIDEJIRO , MITSUTAKE HIDEAKI , DOI TAKESHI
IPC分类号： G03G15/08
摘要： PURPOSE:To prevent the generation of an overshoot phenomenon at the time of controlling a toner concentration, by measuring the toner concentration in a developer at a prescribed time interval, and replenishing the toner quantity of a prescribed quantity required for reaching a reference concentration value, to the developer quantity which is divided by a measurement interval. CONSTITUTION:By a toner concentration detector 25, the toner concentration in a developer is measured at a prescribed time interval, and when its measured value is below a reference concentration value which is determined in advance, the toner quantity of a prescribed quantity required for reaching said reference concentration is replenished to the developer quantity which is divided by a measurement interval. That is, the developer quantity in a developing device is divided into very small quantities, the toner concentration of its divided developer is measured in a real time and a toner is replenished. In such a way, a toner concentration control being free from an overshoot and having a high definition can be executed, and an image having no fog can be obtained.

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