Patents by Inventor Yozo Hotta
Yozo Hotta 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).
-
Patent number: 9040877Abstract: The heating apparatus of a surface-heating type, includes a rotary member, an opposing member that forms a nip with respect to the rotary member, and a heating member for heating a portion of a rotary member surface other than the nip, in which temperature used for heating the rotary member by the heating member is controlled, and a heating material inserted in the nip to be nipped and conveyed therein is heated using heat of the rotary member. Accordingly, after insertion of the heating material in the nip starts, control temperature of the heating member is increased before the rotary member rotates by one revolution, thereby preventing an uneven heating phenomenon of the heating material in the first revolution and the second revolution or later, and preventing uneven gloss due to the uneven heating phenomenon in the fixing apparatus.Type: GrantFiled: July 22, 2008Date of Patent: May 26, 2015Assignee: CANON KABUSHIKI KAISHAInventors: Hideo Nanataki, Taku Fukita, Yozo Hotta
-
Patent number: 7504605Abstract: The heating apparatus of a surface-heating type, includes a rotary member, an opposing member that forms a nip with respect to the rotary member, and a heating member for heating a portion of a rotary member surface other than the nip, in which temperature used for heating the rotary member by the heating member is controlled, and a heating material inserted in the nip to be nipped and conveyed therein is heated using heat of the rotary member. Accordingly, after insertion of the heating material in the nip starts, control temperature of the heating member is increased before the rotary member rotates by one revolution, thereby preventing an uneven heating phenomenon of the heating material in the first revolution and the second revolution or later, and preventing uneven gloss due to the uneven heating phenomenon in the fixing apparatus.Type: GrantFiled: March 30, 2007Date of Patent: March 17, 2009Assignee: Canon Kabushiki KaishaInventors: Hideo Nanataki, Taku Fukita, Yozo Hotta
-
Publication number: 20080298863Abstract: The heating apparatus of a surface-heating type, includes a rotary member, an opposing member that forms a nip with respect to the rotary member, and a heating member for heating a portion of a rotary member surface other than the nip, in which temperature used for heating the rotary member by the heating member is controlled, and a heating material inserted in the nip to be nipped and conveyed therein is heated using heat of the rotary member. Accordingly, after insertion of the heating material in the nip starts, control temperature of the heating member is increased before the rotary member rotates by one revolution, thereby preventing an uneven heating phenomenon of the heating material in the first revolution and the second revolution or later, and preventing uneven gloss due to the uneven heating phenomenon in the fixing apparatus.Type: ApplicationFiled: July 22, 2008Publication date: December 4, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Hideo Nanataki, Taku Fukita, Yozo Hotta
-
Patent number: 7251427Abstract: The heating apparatus of a surface-heating type, includes a rotary member, an opposing member that forms a nip with respect to the rotary member, and a heating member for heating a portion of a rotary member surface other than the nip, in which temperature used for heating the rotary member by the heating member is controlled, and a heating material inserted in the nip to be nipped and conveyed therein is heated using heat of the rotary member. Accordingly, after insertion of the heating material in the nip starts, control temperature of the heating member is increased before the rotary member rotates by one revolution, thereby preventing an uneven heating phenomenon of the heating material in the first revolution and the second revolution or later, and preventing uneven gloss due to the uneven heating phenomenon in the fixing apparatus.Type: GrantFiled: February 12, 2004Date of Patent: July 31, 2007Assignee: Canon Kabushiki KaishaInventors: Hideo Nanataki, Taku Fukita, Yozo Hotta
-
Publication number: 20070170165Abstract: The heating apparatus of a surface-heating type, includes a rotary member, an opposing member that forms a nip with respect to the rotary member, and a heating member for heating a portion of a rotary member surface other than the nip, in which temperature used for heating the rotary member by the heating member is controlled, and a heating material inserted in the nip to be nipped and conveyed therein is heated using heat of the rotary member. Accordingly, after insertion of the heating material in the nip starts, control temperature of the heating member is increased before the rotary member rotates by one revolution, thereby preventing an uneven heating phenomenon of the heating material in the first revolution and the second revolution or later, and preventing uneven gloss due to the uneven heating phenomenon in the fixing apparatus.Type: ApplicationFiled: March 30, 2007Publication date: July 26, 2007Applicant: Canon Kabushiki KaishaInventors: Hideo NANATAKI, Taku Fukita, Yozo Hotta
-
Patent number: 7206541Abstract: An image heating apparatus for heating an image formed on a recording material, includes a heating member; a flexible member movable in contact with the heating member; an elastic roller for forming a nip with the heating member with the flexible member interposed therebetween; wherein a pressure in the nip increases to a maximum peak toward downstream substantially without decreasing with respect to a moving direction of the recording material, wherein the heating member is disposed upstream of the maximum peak portion with respect to the moving direction of the recording material.Type: GrantFiled: July 9, 2004Date of Patent: April 17, 2007Assignee: Canon Kabushiki KaishaInventors: Taku Fukita, Hideo Nanataki, Tetsuya Sano, Yozo Hotta, Kazuhisa Kemmochi, Makoto Fukatsu, Keisuke Abe
-
Patent number: 7162194Abstract: The present invention provides an image heating apparatus including: a conveying roller for conveying the recording material; a heat supply member which supplies heat to the conveying roller, the heat supply member being in contact with an external periphery of the conveying roller to form a heating nip portion; a back-up member which forms a conveying nip portion in cooperation with the conveying roller for nipping and conveying the recording material; wherein, in a rotating direction of the conveying roller, the heating nip portion has a width larger than a width of the conveying nip portion, and a total pressure applied to the conveying nip portion is larger than a total pressure applied to the heating nip portion.Type: GrantFiled: February 24, 2004Date of Patent: January 9, 2007Assignee: Canon Kabushiki KaishaInventors: Yozo Hotta, Hideo Nanataki, Taku Fukita
-
Patent number: 6985689Abstract: An image heating apparatus has a first rotatable member contacting a second rotatable member, wherein the recording material bearing the image passes through a nip portion formed at a position between the first rotatable member and the second rotatable member; a heater for heating the first rotatable member, the heater having a third rotatable member that is flexible and a temperature detecting element, wherein the third rotatable member contacts an outer peripheral surface of the first rotatable member and the temperature detecting element is provided in an area of an inside surface said third rotatable member, wherein the first rotatable member and the third rotatable member contact; and a controller for controlling the heater based on detecting the temperature of said temperature detecting element.Type: GrantFiled: November 21, 2003Date of Patent: January 10, 2006Assignee: Canon Kabushiki KaishaInventors: Hideo Nanataki, Taku Fukita, Yozo Hotta
-
Publication number: 20050036809Abstract: An image heating apparatus for heating an image formed on a recording material, includes a heating member; a flexible member movable in contact with the heating member; an elastic roller for forming a nip with the heating member with the flexible member interposed therebetween; wherein a pressure in the nip increases to a maximum peak toward downstream substantially without decreasing with respect to a moving direction of the recording material, wherein the heating member is disposed upstream of the maximum peak portion with respect to the moving direction of the recording material.Type: ApplicationFiled: July 9, 2004Publication date: February 17, 2005Applicant: Canon Kabushiki KaishaInventors: Taku Fukita, Hideo Nanataki, Tetsuya Sano, Yozo Hotta, Kazuhisa Kemmochi, Makoto Fukatsu, Keisuke Abe
-
Publication number: 20040202497Abstract: The present invention provides an image heating apparatus including:Type: ApplicationFiled: February 24, 2004Publication date: October 14, 2004Applicant: Canon Kabushiki KaishaInventors: Yozo Hotta, Hideo Nanataki, Taku Fukita
-
Publication number: 20040161255Abstract: The heating apparatus of a surface-heating type, includes a rotary member, an opposing member that forms a nip with respect to the rotary member, and a heating member for heating a portion of a rotary member surface other than the nip, in which temperature used for heating the rotary member by the heating member is controlled, and a heating material inserted in the nip to be nipped and conveyed therein is heated using heat of the rotary member. Accordingly, after insertion of the heating material in the nip starts, control temperature of the heating member is increased before the rotary member rotates by one revolution, thereby preventing an uneven heating phenomenon of the heating material in the first revolution and the second revolution or later, and preventing uneven gloss due to the uneven heating phenomenon in the fixing apparatus.Type: ApplicationFiled: February 12, 2004Publication date: August 19, 2004Applicant: Canon Kabushiki KaishaInventors: Hideo Nanataki, Taku Fukita, Yozo Hotta
-
Publication number: 20040136743Abstract: The image heating apparatus for heating an image formed on a recording material, comprising: first rotatable member; said first rotatable member contacting second rotatable member, wherein the recording material bearing the image passes through a nip portion formed at a position between said first rotatable member and said second rotatable member; heating means for heating said first rotatable member, said heating means including a third rotatable member that is flexible and a temperature detecting element, wherein the third rotatable member contacts an outer peripheral surface of said first rotatable member with the third member, wherein the temperature detecting elements is provided in an area of an inside surface said third rotatable member, wherein said first rotatable member and said third rotatable member contacts in the area; and control means for controlling said heating means based on detecting the temperature of said temperature detecting elements.Type: ApplicationFiled: November 21, 2003Publication date: July 15, 2004Applicant: Canon Kabushiki KaishaInventors: Hideo Nanataki, Taku Fukita, Yozo Hotta
-
Patent number: 6131010Abstract: A fixing apparatus for use in an image forming apparatus such as a copying apparatus or a laser beam printer is disclosed. The fixing apparatus has a heater, a rotatable member having the heater therein, and a pressing member forming a nip by coming into contact with the rotatable member. The rotatable member is provided with a core and an elastic layer formed on the core, and the elastic layer has a JIS-A Standard rubber hardness not more than 5.degree..Type: GrantFiled: November 17, 1997Date of Patent: October 10, 2000Assignee: Canon Kabushiki KaishaInventors: Takao Kume, Norio Hashimoto, Katsuhiko Nishimura, Koichi Hiroshima, Tooru Saitou, Katsunori Takeuchi, Yozo Hotta, Masahiro Suzuki
-
Patent number: 6108500Abstract: An image forming apparatus includes an image forming device for forming an image onto a recording material and a fixing device for fixing the image on the recording material. The fixing device has a rotating member for conveying the recording material, and a controller for controlling the factors related to the peripheral speeds of the rotating member in accordance with the information of the peripheral speeds thereof and the size of the recording material. With the structure thus arranged, it is possible to prevent image problems from taking place due to the difference in the sheet conveying speeds between the image transfer and fixation operations.Type: GrantFiled: December 18, 1997Date of Patent: August 22, 2000Assignee: Canon Kabushiki KaishaInventors: Yuko Ohkama, Masami Takeda, Hiroto Hasegawa, Yozo Hotta
-
Patent number: 6075228Abstract: An image heating device includes a heater generating heat upon electric power supply, and a film whose one surface slidably contacts the heater, and whose other surface moves together with a recording material bearing an image while contacting the recording material. The image on the recording material is heated by heat from the heater through the film. The device also includes a thermoprotector having a bimetal which mechanically changes in order to disconnect electric power supply to the heater when there is an excessive temperature rise. The bimetal of the thermoprotector contacts the heater.Type: GrantFiled: July 2, 1998Date of Patent: June 13, 2000Assignee: Canon Kabushiki KaishaInventors: Masahiro Goto, Hiroto Hasegawa, Yuko Okama, Yozo Hotta
-
Patent number: 5920757Abstract: In an image heating apparatus, a film has one face in sliding contact with a heater having a heat generating portion on a substrate. The other face of the film contacts a recording material bearing an image. The film moves with the recording material and the image on the recording material is heated by heat generated by the heater which is transmitted through the film. A temperature detecting element detects the temperature of the heater. The heat generating portion of the heater has a first heat generating portion and a second heat generating portion on the downstream side of the first heat generating portion with respect to the moving direction of the film. The middle of the temperature detecting element is positioned at the upstream side of the middle between the first and second heat generating portions with respect to the moving direction of the film.Type: GrantFiled: January 30, 1998Date of Patent: July 6, 1999Assignee: Canon Kabushiki KaishaInventors: Satoru Izawa, Masami Takeda, Toshio Miyamoto, Yozo Hotta, Masahiko Suzumi
-
Patent number: 5917529Abstract: An image forming apparatus includes an image bearing member; a scanning device for scanning the image bearing member in accordance with image data; driving source for driving the image bearing member; and a gear for transmitting power to the image bearing member from the driving source.The movement pitch of the image bearing member corresponding to a gear pitch of the gear, and a line pitch of a basic matrix for tone gradation printing are sufficiently different to prevent interference fringe of the image.Type: GrantFiled: October 7, 1996Date of Patent: June 29, 1999Assignee: Canon Kabushiki KaishaInventors: Yozo Hotta, Masahiro Goto, Toshio Miyamoto
-
Patent number: 5850245Abstract: An image output control apparatus is constructed by a converter for converting first information to second information, a controller for starting an output preparing operation before the conversion of the first information of one page to the second information, a memory for holding a control value determined during the output preparing operation, a unit for temporarily stopping the output preparing operation, and a unit for restarting the output preparing operation, wherein the output preparing operation to be restarted is executed on the basis of the control value held in the memory.Type: GrantFiled: December 6, 1995Date of Patent: December 15, 1998Assignee: Canon Kabushiki KaishaInventors: Masahiro Goto, Yoji Serizawa, Toshio Miyamoto, Yuko Ohkama, Saturo Izawa, Yozo Hotta, Koichi Tanigawa
-
Patent number: 5732314Abstract: An image forming apparatus including an image bearing member for bearing an image thereon, an intermediate transfer member having a base body and an elastic member provided outside the base body and onto which an image is transferrable from the image bearing member, and a second transfer member forming a nip portion between the second transfer member and the intermediate transfer member, for transferring an image from the intermediate transfer member to a transfer material in the nip portion. The hardness of the surface of the second transfer member is greater than the hardness of the surface of the intermediate transfer member.Type: GrantFiled: November 23, 1994Date of Patent: March 24, 1998Assignee: Canon Kabushiki KaishaInventors: Shinichi Tsukida, Koichi Tanigawa, Masahiro Goto, Toshio Miyamoto, Yuko Ohkama, Satoru Izawa, Yozo Hotta
-
Patent number: 5669036Abstract: An image forming method is disclosed in which an optical image is formed on an electrostatic latent image bearing member, and its light intensity is modulated in accordance with image information to form an electrostatic latent image, and then development is performed.Type: GrantFiled: January 23, 1996Date of Patent: September 16, 1997Assignee: Canon Kabushiki KaishaInventors: Yozo Hotta, Masahiro Goto, Toshio Miyamoto