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41. 发明专利

JP2002156663A METHOD FOR DISPLAYING IMAGE AND IMAGE FORMING DEVICE 失效
公开(公告)号：JP2002156663A
公开(公告)日：2002-05-31
申请号：JP2000350231
申请日：2000-11-16
申请人： MINOLTA CO LTD
发明人： MATSUURA MASAHIKO , MIZUNO HIROSHI , IKEGAWA AKIHITO , KANAZAWA MASAHARU , AMARIGOME KISHO , KURITA TAKAHARU
IPC分类号： G02F1/17 , G09F9/37 , G09G3/20 , G09G3/34
摘要： PROBLEM TO BE SOLVED: To display an image in a good state with little afterimage by using a reversible static image display medium which can repeatedly display images. SOLUTION: An image is displayed by using a reversible image display medium 11 which houses a developer DL containing white developing particles and black magnetic developing particles having triboelectrification property and having different electrification polarities and different optical reflection densities from each other in cells 116 between two substrates 111, 112 and which can display an image by applying an electrostatic field according to the image to be formed so as to drive the developing particles. Prior to displaying an image, an alternating electric field to stir the developer in the medium is applied to initialize the medium 11.

42. 发明专利

JP2002156661A REVERSIBLE IMAGE DISPLAY MEDIUM 失效
公开(公告)号：JP2002156661A
公开(公告)日：2002-05-31
申请号：JP2000350210
申请日：2000-11-16
申请人： MINOLTA CO LTD
发明人： MATSUURA MASAHIKO , MIZUNO HIROSHI , IKEGAWA AKIHITO , KANAZAWA MASAHARU , AMARIGOME KISHO , KURITA TAKAHARU
IPC分类号： G03G9/08 , G02F1/17 , G03G9/097 , G09F9/37
摘要： PROBLEM TO BE SOLVED: To provide a reversible image display medium which can be repeatedly used and can display a high-quality image. SOLUTION: In the reversible image display medium 13, a developer DL containing at least two kinds of dry developing particles WP, BP having triboelectrification property and having different electrification polarities and different optical reflection densities from each other is housed in cells 116 between two substrates 111, 112 and an image can be displayed by forming an electrostatic latent image on one substrate 111 and driving the developing particles by the electric field based on the electrostatic latent image. The average charge amount of the dry developer DL measured by an electric field separation measurement method is controlled to be between 1.0 μC/g and 10 μC/g.

43. 发明专利

JP2002156658A REVERSIBLE IMAGE DISPLAY MEDIUM 失效
公开(公告)号：JP2002156658A
公开(公告)日：2002-05-31
申请号：JP2000350201
申请日：2000-11-16
申请人： MINOLTA CO LTD
发明人： MATSUURA MASAHIKO , MIZUNO HIROSHI , IKEGAWA AKIHITO , KANAZAWA MASAHARU , AMARIGOME KISHO , KURITA TAKAHARU
IPC分类号： G02F1/17
摘要： PROBLEM TO BE SOLVED: To provide a reversible image display medium which can be repeatedly used and can display a high-quality image. SOLUTION: In the reversible image display medium 13, at least two kinds of dry developing particles WP, BP having triboelectrification property and having different electrification polarity and different optical reflection densities from each other are housed in cells 116 between two substrates 111, 112 and an image can be displayed by forming an electrostatic latent image on one substrate 111 and driving the developing particles by the electric field based on the electrostatic latent image. The surface resistivity of the substrate 111 to be in contact with the developer is controlled to >=1×1012 Ω/unit square. The surface resistivity of the substrate 112 in contact with the developer is controlled to be between 1×106 Ω/unit square and 1×1012 Ω/unit square. The center line average roughness Ra of the substrate 111 in contact with the developer is controlled to be between 0.2 μm and 0.5 μm.

44. 发明专利

JP2001260336A IMAGING METHOD 失效
公开(公告)号：JP2001260336A
公开(公告)日：2001-09-25
申请号：JP2000078009
申请日：2000-03-21
申请人： MINOLTA CO LTD
发明人： KANAZAWA MASAHARU
IPC分类号： B41J2/01 , B41J11/14 , B41M5/00
摘要： PROBLEM TO BE SOLVED: To provide an imaging method in which print speed is increased by printing a plurality of sheets of recording media of small size simultaneously in an arrangement employing a low density line head. SOLUTION: In a method for forming an image by repeating the operation of holding a recording medium 4 on a horizontal plane 18a, traveling a print head 14 in the main scanning direction on the horizontal plane 18a with respect to the recording medium 4 and feeding the recording medium 4 in the sub- scanning direction orthogonal to the main scanning direction, printing is performed simultaneously on a plurality of recording media 4 held on the horizontal plane 18a when the recording media 4 (e.g. postcards) are smaller, in size, than the horizontal plane 18a. The print head 14 is an ink jet head provided with a plurality of ink ejection openings across the entire width of recording area in the sub-scanning direction on the recording medium 4 having a smaller size than the horizontal plane 18a.

45. 发明专利

JP2000280555A IMAGING APPARATUS 失效
公开(公告)号：JP2000280555A
公开(公告)日：2000-10-10
申请号：JP9195599
申请日：1999-03-31
申请人： MINOLTA CO LTD
发明人： KANAZAWA MASAHARU , TAKADA HISASHI , SANTO YASUHIRO , YASUTOMI HIDEO
IPC分类号： B41J2/01 , B41J19/18
摘要： PROBLEM TO BE SOLVED: To increase print speed by measuring the moving speed of a carriage and generating a head drive timing at a print head drive section based on the output from an encoder sensor and employing an encoder having at least two resolutions. SOLUTION: An encoder for measuring the moving speed of a carriage 1 in an ink jet printer comprises an encoder film 11 arranged with a plurality of slits in the moving direction of an ink jet head, and a sensor 12 for detecting the slits optically. Based on the output from the encoder sensor 12, a CPU measures the moving speed of the carriage 1 and generates a head drive timing at a print head drive section. The encode being used has a high resolution in low speed region, e.g. initial acceleration region, and a low resolution in high speed region. According to the arrangement, fluctuation of scanning can be prevented during acceleration and deceleration.

46. 发明专利

JP2000010446A ELECTROPHOTOGRAPHIC SYSTEM IMAGE FORMING DEVICE 失效
公开(公告)号：JP2000010446A
公开(公告)日：2000-01-14
申请号：JP17325898
申请日：1998-06-19
申请人： MINOLTA CO LTD
发明人： KANAZAWA MASAHARU
IPC分类号： G03G21/10 , G03G15/10 , G03G15/11
摘要： PROBLEM TO BE SOLVED: To provide an image forming device of an electrophotographic system by which development is executed by using liquid developer where at least toner particles and a charging control agent to impart an electric charge to the toner particles are dispersed in carrier liquid, where one or two or more specified parts brought into contact with the liquid developer are cleaned and cleaning is economically and often executed. SOLUTION: This image forming device of the electrophotographic system developing an electrostatic latent image formed on a photoreceptor 1 by using the liquid developer D is provided with a cleaning device 40 supplying one or two or more specified parts with cleaning liquid so as to clean one or two or more specified parts brought into contact with the liquid developer D such as a developing unit 4, a developer supply tube 402, a developer turn-back tube 403 and a circulation pump 404 and also guiding the cleaning liquid to a developer tank 401, and the carrier liquid C and (or) charging control agent liquid E are used as the cleaning liquid at the cleaning device 40.

47. 发明专利

JPH1165295A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH1165295A
公开(公告)日：1999-03-05
申请号：JP22029597
申请日：1997-08-15
申请人： MINOLTA CO LTD
发明人： KANAZAWA MASAHARU
IPC分类号： G03G15/11
摘要： PROBLEM TO BE SOLVED: To stably obtain a satisfactory image by controlling, based on a detected toner-image-density by an optical reflection-density-detection means, so that a charge-control agent in liquid developer is maintained at a proper concentration. SOLUTION: From the light emission part 6a of the reflection-type photosensor 6, light irradiates a toner image for optical reflection-density- detection formed on a photoreceptor 1, and the reflected light from the toner image is received by a light receiving part 6b. Thus, the density of the toner image on the photoreceptor 1 is detected. A control part CONT compares a given reflection-density reference value (a given reference voltage) and the detection value (output voltage) of the sensor 6. When the detection value is lower than the given reference value, it judges that the density of toner image used for the density detection is higher than a proper density. Accordingly it transmits a signal to a charge-control-agent supply device 47 and make the device 47 supply the charge control agent to the liquid developer D. On the other hand, when the detection value of the sensor 6 is higher than the specific reference value, liquid carrier is supplied to the liquid developer D from the liquid-carrier supply device 48.

48. 发明专利

JPH10333367A ELECTROPHOTOGRAPHIC LIQUID DEVELOPER 失效
公开(公告)号：JPH10333367A
公开(公告)日：1998-12-18
申请号：JP6352998
申请日：1998-03-13
申请人： MINOLTA CO LTD
发明人： MIYAMOTO HIDETOSHI , FUJIWARA TOSHIMITSU , IINO SHUJI , KANAZAWA MASAHARU , KOJIMA SEIJI
IPC分类号： G03G9/12 , G03G9/13
摘要： PROBLEM TO BE SOLVED: To obtain an electrophotographic liq. developer capable of heat- transferring and/or heat-fixing a visible toner image on a recording material while suppressing the thermal damage and deterioration of the internal parts of an image forming device such as the electrostatic latent image carrier, capable of avoiding trouble such as toner blocking and capable of selecting a resin binder as a toner material from a wide range. SOLUTION: Colored fine particles are dispersed in an electric insulating liq. medium to obtain the objective electrophotographic liq. carrier. The colored fine particles contain a resin binder having one or more peaks in a mol.wt. range of =5,000 in the mol.wt. distribution by gel permeation chromatography.

49. 发明专利

JPH10319738A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH10319738A
公开(公告)日：1998-12-04
申请号：JP13335897
申请日：1997-05-23
申请人： MINOLTA CO LTD
发明人： KANAZAWA MASAHARU , IINO SHUJI , FUJIWARA TOSHIMITSU , KOJIMA SEIJI , MIYAMOTO HIDETOSHI
IPC分类号： G03G15/16 , G03G15/11
摘要： PROBLEM TO BE SOLVED: To suppress the occurrence of an image flow or transfer failure and prevent the fusion of toner to an intermediate transfer body by secondarily transferring a toner image on the intermediate transfer body to a recording material after a carrier solution is reduced into a specified range. SOLUTION: A carrier solution C1 and a toner image T held on a photoreceptor 1 are transferred to a primary transfer area P1, attracted to a primary transfer charger 11 side to which a primary transfer voltage is applied by a power source PW2, and primarily transferred onto an intermediate transfer drum 10. A carrier solution C2 and the toner image T held on the drum reach a carrier removing device 6a provided in an area P3. The carrier solution C2 is removed to the range of 0.05-0.3 mg/cm , preferably, 0.05-0.2 mg/cm to form a residual carrier solution C3. The carrier solution C3 and the toner image T are transferred to a secondary transfer area P2 according to the a2-directional rotation of the intermediate transfer drum 10, attracted to a secondary transfer roller 14, and transferred onto a recording paper S.

50. 发明专利

JPH10301398A LIQUID DEVELOPING DEVICE 失效
公开(公告)号：JPH10301398A
公开(公告)日：1998-11-13
申请号：JP11236497
申请日：1997-04-30
申请人： MINOLTA CO LTD
发明人： KOJIMA SEIJI , MIYAMOTO HIDETOSHI , FUJIWARA TOSHIMITSU , KANAZAWA MASAHARU , IINO SHUJI
IPC分类号： G03G15/10
摘要： PROBLEM TO BE SOLVED: To provide a liquid developing device which is capable of reducing the occurrence of a defect in an image such as an image memory and a streaky noise by making the removal of toner remaining after development, stuck on a developing roller more efficient than that in a conventional device, in a liquid developing device for developing a latent image, so as to make it a visible toner image by supplying a liquid developer including the toner to an electrostatic latent image formed on an electrostatic latent image carrier, with a rotationally driven developing roller. SOLUTION: The liquid developing device 4 is for supplying the liquid developer D including the toner to the electrostatic latent image formed on the electrostatic latent image carrier 1 by the rotationally driven developing roller 41 and developing the latent image, to make it the visible toner image. A brush roller 42 is arranged in contact with the developing roller 41, at a position P3 nearer to the downstream side than an electrostatic latent image developing region P1, in the rotational direction a2 of the roller 41. Then, the brush roller 42 is rotationally driven so that in its contact region with the developing roller 41, the moving directions of the outer peripheries of both these rollers are opposite.

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