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31.发明专利
公开(公告)号：JP2002268252A
公开(公告)日：2002-09-18
申请号：JP2001062148
申请日：2001-03-06
Applicant: CANON KK
Inventor： KAWAMURA KUNIMASA , EBARA TOSHIYUKI , KAWADA MASAYA , KARAKI TETSUYA , OWAKI HIRONORI
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic method by which the defect of an image caused by the adhesion of toner is restrained, image flowing is restrained even under high humidity environment and a high-quality image can be stably supplied over a long term. SOLUTION: The photoreceptor constituted by successively laminating at least a photoconductive layer constituted of amorphous material with a silicon atom as a base and a surface protective layer constituted of amorphous carbon on base substance is used as a light receiving member, and the surface roughness Ra within the range of 10 μm×10 μm of the photoreceptor is >=10 nm and =0.1 and =5 μm and =0.950 and
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公开(公告)号：JP2001318504A
公开(公告)日：2001-11-16
申请号：JP2000136009
申请日：2000-05-09
Applicant: CANON KK
Inventor： KAWAMURA KUNIMASA , KARAKI TETSUYA , YAMAZAKI KOJI
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic device including plural photoreceptors which are uniform in the life of the plural photoreceptors, are high in reliability and low in running costs. SOLUTION: This electrophotographic device includes the plural photoreceptors which are formed by laminating surface protective layers consisting preferably of any of a-SiC:H, a-SiN:H, a-C:H and a-CN;H on photosensitive layers containing at least amorphous Si and in which the film thickness or hardness of at least one surface protective layer of the photoreceptors is different from that of the surface protective layers of the other photoreceptors.
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33.发明专利
公开(公告)号：JP2001312084A
公开(公告)日：2001-11-09
申请号：JP2000133531
申请日：2000-05-02
Applicant: CANON KK
Inventor： YAMAZAKI KOJI , KAWAMURA KUNIMASA , KARAKI TETSUYA , NAKAYAMA YUJI
Abstract: PROBLEM TO BE SOLVED: To provide a method for cleaning a photoreceptor so as to effectively prevent image failure such as streaming in an image due to melt sticking or deposition of a foreign matter on the photoreceptor surface which can not be recovered without the work of a service person, and to provide an elecrophotographic device suitable for that method. SOLUTION: The photoreceptor used has a photoconductive layer 102 consisting of a non-single crystal material essentially comprising silicon atoms and a surface layer composed of a first surface layer 103 consisting of a-SiC:H, X containing at least hydrogen and silicon and a second surface layer 104 consisting of a-C:H, X containing at least hydrogen formed on a cylindrical conductive substrate 101. The electrophotographic device adopts a method which uses a fur brush for cleaning the photoreceptor.
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公开(公告)号：JP2000194179A
公开(公告)日：2000-07-14
申请号：JP37072898
申请日：1998-12-25
Applicant: CANON KK
Inventor： OWAKI HIRONORI , YAMAZAKI KOJI , EBARA TOSHIYUKI , KARAKI TETSUYA , KAWAMURA KUNIMASA
Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic method and an electrophotographic device by which the reproducibility of the dots of an output image is enhanced and the image being excellent in gradient is obtained. SOLUTION: By this electrophotographic method, an electrostatic latent image is formed by using a photoreceptor and in an electrification process and a process that a light beam is emitted. The potential attenuation amount of the photoreceptor in a depth direction at the irradiating time of the light beam for one pixel is set to be >=65% of that at the irradiating time of the continuous light beam and under 135% than it. Besides, this electrophotographic device having a measurement and control means is used for executing this electrophotographic method.
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公开(公告)号：JP2003195713A
公开(公告)日：2003-07-09
申请号：JP2001394097
申请日：2001-12-26
Applicant: CANON KK
Inventor： KARAKI TETSUYA , EBARA TOSHIYUKI , KAWADA MASAYA , OWAKI HIRONORI , KAWAMURA KUNIMASA
Abstract: PROBLEM TO BE SOLVED: To achieve, in an electrophotographic device, a reduction in load on a cleaning unit, the prevention of irregular abrasion of the surface of a photoreceptor, and also the prevention of excessive abrasion of the photoreceptor used in a high speed machine. SOLUTION: The electrophotographic device has a latent image formation means for forming a latent image by subjecting the photoreceptor to electrification and exposure, a toner image formation means that forms a toner image by supplying toner to the latent image, a transfer means for transferring the toner image to a transfer material, and a cleaning means for removing residue and foreign matter on the surface of the photoreceptor by means of a cleaning blade. In the electrophotographic device, if the free energy of the surface of the photoreceptor is γD, the free energy of the surface of the cleaning blade is γB, and the free energy of the surface of the toner is γT, the relationship γD>γB>γT is established. Additionally, the peripheral speed of the photoreceptor is 400 mm/sec or higher and the relationship of γD>γT>γB is established. COPYRIGHT: (C)2003,JPO
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Patent Agency Ranking
公开(公告)号：JP2003156878A
公开(公告)日：2003-05-30
申请号：JP2001355915
申请日：2001-11-21
Applicant: CANON KK
Inventor： SHIBAYAMA YASUKO , MICHIGAMI TADASHI , HASEGAWA YUSUKE , KAWAMURA KUNIMASA
Abstract: PROBLEM TO BE SOLVED: To provide a toner capable of giving good images over a prolonged period of time and attaining saving of energy and to provide an image forming method. SOLUTION: In the image forming method, an amorphous silicon photoreceptor having a photoconductive layer and a surface protecting layer stacked in order on an electrically conductive substrate is used, wherein the interfacial region between the photoconductive layer and the surface protecting layer has a continuously varying composition and the average gradient Δa of the surface of the photoreceptor is 0.12-1.0. The toner used in the image forming method comprises at least a binder resin and a colorant, the binder resin comprises (a) a hybrid resin component having a vinyl polymerized unit and a polyester unit, wherein (b) the mixing mass ratio between a vinyl monomer and a polyester monomer is 10:90 to 50:50, and the toner contains 10-50% tetrahydrofuran (THF)-insoluble component.
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公开(公告)号：JP2003156877A
公开(公告)日：2003-05-30
申请号：JP2001355914
申请日：2001-11-21
Applicant: CANON KK
Inventor： SHIBAYAMA YASUKO , MICHIGAMI TADASHI , HASEGAWA YUSUKE , KAWAMURA KUNIMASA
Abstract: PROBLEM TO BE SOLVED: To provide toner, an image forming method and an image forming device having a high transfer efficiency, capable of obtaining a good image by preventing toner from sticking at a cleaning time, and also, capable of saving energies. SOLUTION: The toner includes a composition constituted of at least binding resin and coloring agent, the binding resin is polyester resin, and the acid value of the binding resin is 1 to 50 mgKOH/g, a photoreceptor is provided with a conductive substrate, a photoconductive layer containing at least amorphous silicone and a surface protecting layer formed of amorphous material having either of silicone and carbon as a base body, and the photoconductive layer and the surface protecting layer are successively layered on the conductive substrate while continuously changing the composition in the boundary area of the photoconductive layer and the surface protecting layer, and the average inclination of the surface measured by an interatomic power microscope is 0.12 to 1.0. The image is formed with the toner by using the photoreceptor.
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公开(公告)号：JP2003156874A
公开(公告)日：2003-05-30
申请号：JP2001355918
申请日：2001-11-21
Applicant: CANON KK
Inventor： HASEGAWA YUSUKE , MICHIGAMI TADASHI , SHIBAYAMA YASUKO , KAWAMURA KUNIMASA
Abstract: PROBLEM TO BE SOLVED: To provide toner and an image forming method having a high cleaning performance even in the case of using small-grain toner, and also, wherein the shaving of a photoreceptor is suppressed, and also, to provide the toner and the image forming method for stably obtaining an image of high quality over a long period while suppressing selective developing due to a long endurance. SOLUTION: An image carrier used in the image forming method is an amorphous photoreceptor constituted by successively layering a photoconductive layer containing at least amorphous silicone and a surface protecting layer on a conductive substrate, and the boundary composition between the surface protecting layer and the photoconductive layer is continuously changed, and the average inclination Δa of the image carrier is controlled to be within the extent of 0.12 to 1.0, and the magnetic toner used in the image forming method is provided with at least binding resin and a magnetic body, the weight average grain size (D4) of the toner is 5 to 10 μm, and the surface existence ratio of the magnetic body obtained by image-analyzing an electron microscopic image by the extent of 5 μm×5 μm on the magnetic toner surface is 0.05 to 0.70.
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公开(公告)号：JP2003098703A
公开(公告)日：2003-04-04
申请号：JP2001294238
申请日：2001-09-26
Applicant: CANON KK
Inventor： KOBORI NAOKUNI , FUJIMOTO MASAMI , FUJIKAWA HIROYUKI , KAWAMURA KUNIMASA
Abstract: PROBLEM TO BE SOLVED: To provide magnetic one-component toner and an image forming method by which the life of a photoreceptor can be prolonged. SOLUTION: In this image forming method the amorphous silicon photoreceptor has base substance 101, and a photoconductor layer 102 and a surface protective layer 103 successively laminated on the base substance, and the average inclination Δa of the surface of the photoreceptor in the range of 10 μm×10 μm is 0.12 to 1.0 and boundary composition 107 between the surface protective layer and the photoconductor layer of the photoreceptor is consecutively changed. In a magnetic one-component developing method, the magnetic toner used in the image forming method has particles whose circularity (a) is >=0.90 out of particles whose particle size is >=3 μm by >=85 number % and incorporates fluorine-contained resin particles whose primary particle size is
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公开(公告)号：JP2002149029A
公开(公告)日：2002-05-22
申请号：JP2000347027
申请日：2000-11-14
Applicant: CANON KK
Inventor： KAWADA MASAYA , OWAKI HIRONORI , KAWAMURA KUNIMASA , YAMAZAKI KOJI
Abstract: PROBLEM TO BE SOLVED: To provide satisfactory cleaning property which varies little in respect of the change of an environment (especially of a temperature), and to improve the durability of a photoreceptor and a cleaning member. SOLUTION: A residual transfer toner on the surface of the photoreceptor is removed by abutting a cleaning blade on the surface of the photoreceptor. When the standard deviation coefficient of dynamic friction expressing load dependency in the variance of a dynamic frictional force to exert between the surface of the photoreceptor and the cleaning member is defined as a dynamic friction deviation coefficient, within the range that a temperature on an abutting part abutting the surface of the photoreceptor and the cleaning member is from 15 to 60 deg.C, the dynamic friction deviation coefficient is made to be within 0.1. Besides, at an arbitrary point within a range that the temperature on the abutting part is from 15 to 60 deg.C, a friction coefficient between the surface of the photoreceptor and the cleaning member is made to be
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