Patents by Inventor Motoo Urawa
Motoo Urawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7291361Abstract: Disclosed herein is an image forming process for forming an image-recorded article having a coating layer on at least a part of an image formed, which comprises the steps of providing a liquid composition containing a polymer, providing an image-recorded article formed on a recording medium by an ink-jet recording method, and applying the liquid composition to at least a part of an image of the recorded article to insolubilize the polymer contained in the liquid composition on the surface of the image, thereby forming the coating layer at a position to which the liquid composition has been applied, wherein the recording medium has a surface which insolubilizes the polymer.Type: GrantFiled: August 13, 2004Date of Patent: November 6, 2007Assignee: Canon Kabushiki KaishaInventors: Hiroyuki Ogino, Motoo Urawa, Muneyoshi Sunada, Yoichi Takada, Masanori Ito, Hiroshi Asakawa, Hideki Takayama, Hitoshi Nagashima, Takashi Sawada
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Patent number: 6848781Abstract: Disclosed herein is an image forming process for forming an image-recorded article having a coating layer on at least a part of an image formed, which includes the steps of providing a liquid composition containing a polymer, providing an image-recorded article formed on a recording medium by an ink-jet recording method, and applying the liquid composition to at least a part of an image of the recorded article to insolubilize the polymer contained in the liquid composition on the surface of the image, thereby forming the coating layer at a position to which the liquid composition has been applied, wherein the recording medium has a surface which insolubilizes the polymer.Type: GrantFiled: September 26, 2003Date of Patent: February 1, 2005Assignee: Canon Kabushiki KaishaInventors: Hiroyuki Ogino, Motoo Urawa, Muneyoshi Sunada, Yoichi Takada, Masanori Ito, Hiroshi Asakawa, Hideki Takayama, Hitoshi Nagashima, Takashi Sawada
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Publication number: 20050007436Abstract: Disclosed herein is an image forming process for forming an image-recorded article having a coating layer on at least a part of an image formed, which comprises the steps of providing a liquid composition containing a polymer, providing an image-recorded article formed on a recording medium by an ink-jet recording method, and applying the liquid composition to at least a part of an image of the recorded article to insolubilize the polymer contained in the liquid composition on the surface of the image, thereby forming the coating layer at a position to which the liquid composition has been applied, wherein the recording medium has a surface which insolubilizes the polymer.Type: ApplicationFiled: August 13, 2004Publication date: January 13, 2005Applicant: Canon Kabushiki KaishaInventors: Hiroyuki Ogino, Motoo Urawa, Muneyoshi Sunada, Yoichi Takada, Masanori Ito, Hiroshi Asakawa, Hideki Takayama, Hitoshi Nagashima, Takashi Sawada
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Publication number: 20040135864Abstract: Disclosed herein is an image forming process for forming an image-recorded article having a coating layer on at least a part of an image formed, which comprises the steps of providing a liquid composition containing a polymer, providing an image-recorded article formed on a recording medium by an ink-jet recording method, and applying the liquid composition to at least a part of an image of the recorded article to insolubilize the polymer contained in the liquid composition on the surface of the image, thereby forming the coating layer at a position to which the liquid composition has been applied, wherein the recording medium has a surface which insolubilizes the polymer.Type: ApplicationFiled: September 26, 2003Publication date: July 15, 2004Applicant: Canon Kabushiki KaishaInventors: Hiroyuki Ogino, Motoo Urawa, Muneyoshi Sunada, Yoichi Takada, Masanori Ito, Hiroshi Asakawa, Hideki Takayama, Hitoshi Nagashima, Takashi Sawada
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Patent number: 6033817Abstract: A toner for developing an electrostatic image is disclosed which has at least one endothermic peak in the temperature region of 120.degree. C. or below in differential thermal analysis and contains, in its particles having particle diameters of 3 .mu.m or larger, not less than 93% by number of particles having a circularity of at least 0.90 and less than 30% by number of particles having a circularity of at least 0.98. The toner does not cause the re-transfer under high transfer current conditions and can realize the formation of good images with high image density. Also, an image forming method using the toner is disclosed.Type: GrantFiled: July 29, 1997Date of Patent: March 7, 2000Assignee: Canon Kabushiki KaishaInventors: Hiroshi Yusa, Motoo Urawa, Keita Nozawa, Yuki Karaki, Kazuo Maruyama
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Patent number: 5915150Abstract: An electrophotographic image forming method according to (I) a so-called simultaneous development and cleaning scheme or cleaner-less scheme is effectively operated by using a specific non-magnetic toner. (II) The non-magnetic toner comprises non-magnetic toner particles having a shape factor SF-1 of 120-160, a shape factor SF-2 of 115-140 and a weight-average particle size of 4-9 .mu.m. (III) The non-magnetic toner further includes inorganic fine particles (a) having a number-average primary particle size of at most 50 nm and spherical fine particles (b) having a number-average primary particle size of 50-1000 nm and a surface area-based sphericity .psi. of 0.91-1.00, respectively externally added to the non-magnetic toner particles.Type: GrantFiled: February 20, 1997Date of Patent: June 22, 1999Assignee: Canon Kabushiki KaishaInventors: Tsutomu Kukimoto, Motoo Urawa, Shuichi Aita, Satoshi Yoshida
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Patent number: 5840457Abstract: A magnetic black toner for electrophotography, includes: (a) magnetic black toner particles containing a binder resin, a magnetic material in 30-200 wt. parts per 100 wt. parts of the binder resin, and a first solid wax, and (b) first inorganic fine powder. The first solid wax (ii) provides a DSC heat-absorption main peak in a range of 60.degree.-120.degree. C., and (iii) shows a molecular weight distribution factor Mw/Mn of 1.0-2.0. The binder resin (iv) has a THF (tetrahydrofuran)-insoluble content of at most 5 wt. %, and (v) contains a THF-soluble content showing a GPC molecular weight distribution including a content (M1) of 40-70% in molecular weights of below 5.times.10.sup.4, a content (M2.ltoreq.M1) of 20-45% in molecular weights of 5.times.10.sup.4 -5.times.10.sup.5, and a content (M3<M2) of 2-25% in molecular weights exceeding 5.times.10.sup.5. (vi) The magnetic black toner exhibits a tan .delta. of 0.5-3.0 in a range of 150.degree.-190.degree. C. and a tan .delta. at 150.degree. C.Type: GrantFiled: July 30, 1997Date of Patent: November 24, 1998Assignee: Canon Kabushiki KaishaInventors: Motoo Urawa, Keita Nozawa, Hiroshi Yusa, Takashige Kasuya, Yuki Karaki, Kazuo Maruyama, Masao Takano
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Patent number: 5774771Abstract: An image forming method has a developing step of developing an electrostatic latent image by the use of a developer to form a toner image on an electrostatic latent image bearing member, a primary transfer step of transferring the toner image onto an intermediate transfer member to which a voltage is applied, and a secondary transfer step of transferring onto a transfer medium the toner image held on the intermediate transfer member, while a transfer means to which a voltage is applied is pressed against the transfer medium. The developer has a toner. The toner is a black toner having at least i) black toner particles formed of a binder resin with a colorant dispersed therein and ii) an inorganic fine powder. The black toner has the value of shape factor SF-1 of 110<SF-1.ltoreq.180, the value of shape factor SF-2 of 110<SF-2.ltoreq.140, and the value of ratio B/A of 1.Type: GrantFiled: February 9, 1996Date of Patent: June 30, 1998Assignee: Canon Kabushiki KaishaInventors: Tsutomu Kukimoto, Motoo Urawa, Kenji Okado, Toshiyuki Ugai, Keita Nozawa, Satoshi Yoshida, Yuki Karaki
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Patent number: 5731122Abstract: An image forming method and image forming apparatus for charging a photosensitive member, exposing the charged photosensitive member thereby forming an electrostatic latent image, carrying toner with a toner carrying member to bring the toner into contact with the photosensitive member surface, thereby developing the electrostatic latent image and forming a toner image upon the photosensitive member, transferring the toner image that is on the photosensitive member to transfer material such as paper, and conducting a simultaneous developing-cleaning process which recovers residual toner remaining on the photosensitive member following the transfer process, so that toner consumption is greatly reduced and high image quality is maintained at the same time. The angle of contact of the photosensitive member surface to water is 85.degree.Type: GrantFiled: November 8, 1995Date of Patent: March 24, 1998Assignee: Canon Kabushiki KaishaInventors: Satoshi Yoshida, Motoo Urawa, Shuichi Aita, Tsutomu Kukimoto, Yoshifumi Hano, Yuki Nishio
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Patent number: 5715501Abstract: An image forming method includes forming an electrostatic latent image on an image bearing member having a surface of which contact angle with water is at least 90.degree., forming a toner layer on a toner carrying member, bringing the toner layer into contact with the surface of the image bearing member on which the electrostatic latent image has been formed, while rotating the image bearing member and the toner carrying member reciprocally, and developing the electrostatic latent image by the use of the toner of the toner layer to form a toner image.Type: GrantFiled: January 22, 1997Date of Patent: February 3, 1998Assignee: Canon Kabushiki KaishaInventors: Shuichi Aita, Toshiyuki Yoshihara, Motoo Urawa, Tsutomu Kukimoto, Yoshifumi Hano
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Patent number: 5712070Abstract: A toner for developing electrostatic images is constituted by toner particles comprising a binder resin and a colorant. The toner is characterized by having (i) a particle size distribution including a weight-average particle size D.sub.4 of X .mu.m and Y% by number of toner particles having a particle size of at most 3.17 .mu.m satisfying the following conditions (1) and (2):-5X+35.ltoreq.Y.ltoreq.-25X+180 (1)3.5.ltoreq.X.ltoreq.6.5 (2),(ii) at least one heat absorption peak in a temperature region of at most 110.degree. C. as measured by differential thermal analysis, and (iii) a tap void of 0.45-0.70. The toner is effective for obviating the sleeve ghost phenomenon.Type: GrantFiled: February 7, 1996Date of Patent: January 27, 1998Assignee: Canon Kabushiki KaishaInventors: Keita Nozawa, Motoo Urawa, Osamu Tamura, Tsutomu Kukimoto
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Patent number: 5618647Abstract: A magnetic toner has magnetic toner particles containing a binder resin and a magnetic material, and an inorganic fine powder treated with an organic compound. The magnetic toner has a volume average particle diameter D.sub.v (.mu.m) of 3 .mu.m.ltoreq.D.sub.v <6 .mu.m, a weight average particle diameter D.sub.4 (.mu.m) of 3.5 .mu.m.ltoreq.D.sub.4 <6.5 .mu.m, a percentage M.sub.r of particles with particle diameters of 5 .mu.m or smaller in number particle size distribution of the magnetic toner, of 60% by number<M.sub.r .ltoreq.90% by number, and the ratio of a percentage N.sub.r of particles with particle diameters of 3.17 .mu.m or smaller in number particle size distribution of the magnetic toner to a percentage N.sub.v of particles with particle diameters of 3.17 .mu.m or smaller in volume particle size distribution of the magnetic toner, N.sub.r /N.sub.v, of from 2.0 to 8.0.Type: GrantFiled: August 28, 1995Date of Patent: April 8, 1997Assignee: Canon Kabushiki KaishaInventors: Tsutomu Kukimoto, Yasuhide Goseki, Motoo Urawa, Masayoshi Shimamura, Keiji Okano, Keita Nozawa, Satoshi Yoshida, Masaki Ojima
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Patent number: 5534982Abstract: A developing apparatus includes a developer carrying member for opposing to an image bearing member bearing an electrostatic image, and for carrying a developer to develop the electrostatic image on the image bearing member, the developer having a polarity which is the same as a charging polarity of the image bearing member, and a bias voltage source for applying an oscillating bias voltage to the developer carrying member. The bias voltage oscillates interposing an image portion potential of the image bearing member, and an absolute value of a peak level of a background portion side potential is smaller than an absolute value of a background portion potential.Type: GrantFiled: March 3, 1994Date of Patent: July 9, 1996Assignee: Canon Kabushiki KaishaInventors: Katsuhiro Sakaizawa, Motoo Urawa, Tsutomu Kukimoto, Satoshi Yoshida
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Patent number: 5071727Abstract: A triboelectrically chargeable composition for use in development of electrostatic latent images. The composition comprises a positively chargeable compound and a base material carrying the positively chargeable compound. The positively chargeable compound has an oxidation potential of 750 mV or below, a whiteness W of 0.5 or above and an average particle size of 5.0 microns or smaller. The composition is embodied typically as a positively chargeable toner and also as a charge-imparting material for charging a toner. The positively chargeable toner is especially adapted for development of digital latent images, e.g., as produced by laser beam scanning.Type: GrantFiled: July 11, 1990Date of Patent: December 10, 1991Assignee: Canon Kabushiki KaishaInventors: Takeshi Ikeda, Eiichi Imai, Hiroshi Fukumoto, Katsuhiko Tanaka, Koshi Suematsu, Motoo Urawa, Masanori Takenouchi
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Patent number: 4666815Abstract: A method for developing electrostatic latent images formed on an electrostatic image bearing member, particularly by a thin and uniform layer of toner formed on a toner carrying member. In the method, good images can be stably obtained by controlling the gross electric charge per unit area within the range of 3.times.10.sup.-10 to 10.sup.-7 coulomb/cm.sup.2 in terms of the absolute value thereof and the packing density within the range of 0.1 to 0.6 g/cm.sup.3 with respect to the toner layer carried on the toner carrying member at the developing station.Type: GrantFiled: October 9, 1984Date of Patent: May 19, 1987Assignee: Canon Kabushiki KaishaInventors: Eiichi Imai, Masaki Uchiyama, Motoo Urawa, Atsuko Yamamoto
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Patent number: 4666814Abstract: A method for developing electrostatic latent images formed on an electrostatic image bearing member, particularly by a thin and uniform layer of toner formed on a toner carrying member. In the method, good images can be stably obtained by controlling the packing density within the range of 0.1 to 0.6 g/cm.sup.3 with respect to the toner layer carried on the toner carrying member at the developing station.Type: GrantFiled: October 9, 1984Date of Patent: May 19, 1987Assignee: Canon Kabushiki KaishaInventors: Koshi Suematsu, Masanori Takenouchi, Motoo Urawa, Takeshi Ikeda
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Patent number: 4663263Abstract: A triboelectrically chargeable composition for use in development of electrostatic latent images. The composition contains a substituted guanidine compound having at least one substituent group. The substituted guanidine compound is preferably one represented by the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are the same or different groups including hydrogen atom, alkyl, cycloalkyl, alkenyl, aryl, aralkyl, alkaryl, and heterocyclic groups, of which a hydrogen atom may be further replaced by a substituent group, and at least one of R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 is a group other than hydrogen. The composition is embodied typically as a positively chargeable toner and also as a charge-imparting material for charging a toner.Type: GrantFiled: October 18, 1985Date of Patent: May 5, 1987Assignee: Canon Kabushiki KaishaInventors: Takeshi Ikeda, Eiichi Imai, Hiroshi Fukumoto, Katsuhiko Tanaka, Koshi Suematsu, Motoo Urawa, Masanori Takenouchi
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Patent number: 4590140Abstract: A method for applying a toner comprising: forming, in a container containing a toner and magnetic particles for application of the toner, a magnetic brush of the magnetic particles; circulating the magnetic particles in the container; forming a thin layer of the toner electrically charged on the toner carrying member, wherein the magnetic particles have been treated with a substance A having a position opposite to that of the toner in the triboelectric series with the material constituting at least the surface of the toner carrying member as the standard substance and with a substance B having a position between the substance A and the toner in the triboelectric series.Type: GrantFiled: October 9, 1984Date of Patent: May 20, 1986Assignee: Canon Kabushiki KaishaInventors: Yasuo Mitsuhashi, Masanori Takenouchi, Hatsuo Tajima, Masaki Uchiyama, Motoo Urawa, Kenji Okado
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Patent number: 4590139Abstract: By combination of a resin exhibiting a melt viscosity of 10.sup.5 cp at a temperature of T.sub.1 and a melt viscosity of 0.5.times.10.sup.5 cp at a temperature of T.sub.2, said temperatures satisfying the following relationships:T.sub.1 =100.degree.-150.degree. C., and .vertline..DELTA.T.vertline.=.vertline.T.sub.1 -T.sub.2 .vertline.=5.degree.-30.degree. C., and at least one of yellow, magenta and cyan colorants having specific structures, a color toner for electrostatic copying excellent in overlapping characteristic, spectral reflection characteristic, transparency, charging characteristic, durability, etc. can be obtained.Type: GrantFiled: October 21, 1985Date of Patent: May 20, 1986Assignee: Canon Kabushiki KaishaInventors: Eiichi Imai, Motoo Urawa
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Patent number: 4571372Abstract: A method for coating of a developer comprises using a device having a vessel for storing a non-magnetic developer and magnetic particles, a developer holding member which conveys with rotation the non-magnetic developer to a latent image bearing member, a regulating member positioned on the side of the outlet of the above vessel for feeding the non-magnetic developer and arranged on the developer holding member with a gap formed therebetween, and a magnetic pole arranged on the side opposite to the regulating member through the intermediary developer holding member for forming a magnetic brush with the magnetic particles on the upstream side of the regulating member on the developer outlet side of said vessel; andforming a thin layer of the non-magnetic developer on the developer holding member, said magnetic particles having a magnetization of 30 emu/g or higher in the external magnetic field of 5000 oersted.Type: GrantFiled: April 19, 1984Date of Patent: February 18, 1986Assignee: Canon Kabushiki KaishaInventors: Motoo Urawa, Masanori Takenouchi, Fumitaka Kan, Kohshi Suematsu, Eiichi Imai