Patents by Inventor Hiromasa Katayama
Hiromasa Katayama 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: 8155561Abstract: A positioning roller is configured to be pressed against an abutment block by a reactive force produced when the positioning roller abuts on an S-D-direction abutment block.Type: GrantFiled: February 27, 2009Date of Patent: April 10, 2012Assignee: Canon Kabushiki KaishaInventor: Hiromasa Katayama
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Patent number: 8139995Abstract: To remove also VOC gas generated from the discharged sheets, an image forming apparatus comprises an image forming unit which forms an image on a sheet; a tray on which sheets on which images are formed by the image forming unit are stacked; a suction device which sucks air from the surrounding space of sheets stacked up on the tray; and a VOC removing unit which removes VOC contained in the air sucked by the sucking device.Type: GrantFiled: November 18, 2011Date of Patent: March 20, 2012Assignee: Canon Kabushiki KaishaInventors: Takashi Fujita, Hiromasa Katayama, Koji Nojima, Kiyoshi Oyama
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Publication number: 20120063803Abstract: To remove also VOC gas generated from the discharged sheets, an image forming apparatus comprises an image forming unit which forms an image on a sheet; a tray on which sheets on which images are formed by the image forming unit are stacked; a suction device which sucks air from the surrounding space of sheets stacked up on the tray; and a VOC removing unit which removes VOC contained in the air sucked by the sucking device.Type: ApplicationFiled: November 18, 2011Publication date: March 15, 2012Applicant: CANON KABUSHIKI KAISHAInventors: TAKASHI FUJITA, Hiromasa Katayama, Koji Nojima, Kiyoshi Oyama
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Patent number: 8113499Abstract: When a sheet bundle is being conveyed by any one pair of plural pairs of rollers independently movable toward and away from the bundle sheet, before the bound portion of the sheet bundle passes the pair of rollers, the pair of rollers on the downstream side nearest to the bound portion are separated from the sheet bundle, and the pairs of rollers more downstream than that pair convey the sheet bundle. Thereby, it happens less often that the pairs of rollers gather the air collected between adjacent ones of the sheets of the sheet bundle to the bound portion to thereby cause a slack to the sheets, and the occurrence of wrinkles or twists in the sheet bundle can be reduced. Also, the pair of rollers are separated from the sheet bundle before the bound portion passes the pair of rollers, whereby it happens less often that the pair of rollers are damaged by the bound portion, and the sheet bundle can be conveyed smoothly.Type: GrantFiled: June 17, 2010Date of Patent: February 14, 2012Assignee: Canon Kabushiki KaishaInventors: Hideki Kushida, Taro Ikeda, Hiroaki Takagishi, Kenichi Hayashi, Tomokazu Nakamura, Wataru Kawata, Hiromasa Katayama
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Patent number: 8095051Abstract: An image forming apparatus has an abutment roller which is provided at either end of a developing sleeve in a longitudinal direction and makes an SD gap (Gsd) between a photosensitive drum and a developing sleeve constant, an abutment block which is provided at either end of the photosensitive drum in a longitudinal direction and on which the abutment roller abuts, and a pressing spring which directly presses the abutment roller toward the abutment block. The stability of the SD gap (Gsd) and reduction of the driving load torque of the developing sleeve can be achieved to cope with both high image quality and durability of the image forming apparatus.Type: GrantFiled: September 10, 2008Date of Patent: January 10, 2012Assignee: Canon Kabushiki KaishaInventor: Hiromasa Katayama
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Patent number: 7983607Abstract: An image forming apparatus has a endless conveying belt (50) which conveys a sheet (P) on which an image is to be formed, and is twisted 720 degrees, and a plurality of suspending members which suspend the conveying belt (50). The conveying belt (50) is suspended on the suspending member like a figure of eight, and conveys a sheet (P) by rotation driving of the conveying belt (50).Type: GrantFiled: September 9, 2008Date of Patent: July 19, 2011Assignee: Canon Kabushiki KaishaInventor: Hiromasa Katayama
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Publication number: 20110140356Abstract: A packing material for distribution is formed in such a shape that, when the packing material attached in a deck unit fails to be removed, a control unit determines that no sheet is present on a tray based on detection signals from a sheet surface detection sensor and a sheet presence detection sensor. When a user checks the deck unit when the absence of sheets is displayed, the user can notice a failure to remove the packing material, thus preventing damage to a sheet feeding apparatus caused by the failure to remove the packing material for distribution.Type: ApplicationFiled: December 7, 2010Publication date: June 16, 2011Applicant: CANON KABUSHIKI KAISHAInventor: Hiromasa Katayama
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Publication number: 20110133399Abstract: An elastic sponge roller is provided at a confluence portion where a first sheet conveyance path joins in a second sheet conveyance path and a leading edge and a rear edge of a sheet are brought into contact with the sponge roller when the sheet is conveyed from the first conveyance path to the second conveyance path. Further, the sponge roller is connected to drive via a one-way clutch. Such a configuration reduces a sound produced at the confluence portion and prevents the leading edge of the sheet from being bent in colliding with the sponge roller to stabilize the conveyance of the sheet.Type: ApplicationFiled: December 3, 2010Publication date: June 9, 2011Applicant: CANON KABUSHIKI KAISHAInventor: Hiromasa Katayama
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Publication number: 20110127709Abstract: In a sheet conveyance apparatus, a sponge roller is provided at a joining portion in which a first sheet conveyance path joins a second sheet conveyance path. A leading edge of a sheet or tailing edge of a sheet abuts at the sponge roller when the sheet is conveyed from the first conveyance path to the second conveyance path. In a projection surface in a direction orthogonal to a sheet conveyance direction in the second sheet conveyance path, an outer periphery of the sponge roller and an outer periphery of a conveyance roller, which is positioned in a downstream side, are partially overlapped in the second conveyance path. Further the sponge roller is rotatably arranged. With such a configuration, the noise generated in the joining portion can be reduced, and effect to reduce the noise can be continued.Type: ApplicationFiled: November 23, 2010Publication date: June 2, 2011Applicant: CANON KABUSHIKI KAISHAInventor: Hiromasa Katayama
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Publication number: 20100252980Abstract: When a sheet bundle is being conveyed by any one pair of plural pairs of rollers independently movable toward and away from the bundle sheet, before the bound portion of the sheet bundle passes the pair of rollers, the pair of rollers on the downstream side nearest to the bound portion are separated from the sheet bundle, and the pairs of rollers more downstream than that pair convey the sheet bundle. Thereby, it happens less often that the pairs of rollers gather the air collected between adjacent ones of the sheets of the sheet bundle to the bound portion to thereby cause a slack to the sheets, and the occurrence of wrinkles or twists in the sheet bundle can be reduced. Also, the pair of rollers are separated from the sheet bundle before the bound portion passes the pair of rollers, whereby it happens less often that the pair of rollers are damaged by the bound portion, and the sheet bundle can be conveyed smoothly.Type: ApplicationFiled: June 17, 2010Publication date: October 7, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Hideki Kushida, Taro Ikeda, Hiroaki Takagishi, Kenichi Hayashi, Tomokazu Nakamura, Wataru Kawata, Hiromasa Katayama
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Patent number: 7798490Abstract: A sheet conveying apparatus, an image forming apparatus, and an image reading apparatus are capable of stably correcting the delay or the advance of a sheet even if sheet conveying rollers such as a skew feeding correction roller and the like are decentered. The delay amount or the advance amount of the sheet being conveyed is detected by a deviation amount detection unit and a control amount setting unit sets the sheet conveying speed and the correction time of a sheet conveying roller which corrects the delay or the advance of the sheet based on the delay amount or the advance amount of the sheet detected by the deviation amount detection unit. The control amount setting unit sets the sheet conveying speed and the correction time of the sheet conveying roller so that the delay or the advance of the sheet is corrected when the sheet conveying roller rotates integer multiple.Type: GrantFiled: March 24, 2008Date of Patent: September 21, 2010Assignee: Canon Kabushiki KaishaInventors: Ken-ichi Tamura, Hiromasa Katayama
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Patent number: 7778583Abstract: The present invention related to an endless belt conveying apparatus and toner image heating apparatus having spring members (thermally responsive members) composed of a shape memory alloy are disposed to both the edges of a pressure fixing belt (pressure belt) in the belt width direction thereof. When the pressure fixing belt offsets to one side in the belt width direction while it travels, one of the spring members, which is heated by the edge of the pressure belt approaching it, is deformed in response to the heat. A roller swing support frame on the belt edge side, which approaches the above spring member, is lifted upward in a gravity direction using a swing pin as a fulcrum in a gravity direction by the operation force generated by the deformation of the one spring member. The swing operation is alternately repeated between the one spring member and the other spring member to thereby correct the inclination of the pressure belt.Type: GrantFiled: December 5, 2007Date of Patent: August 17, 2010Assignee: Canon Kabushiki KaishaInventor: Hiromasa Katayama
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Patent number: 7762540Abstract: When a sheet bundle is being conveyed by any one pair of plural pairs of rollers independently movable toward and away from the bundle sheet, before the bound portion of the sheet bundle passes the pair of rollers, the pair of rollers on the downstream side nearest to the bound portion are separated from the sheet bundle, and the pairs of rollers more downstream than that pair convey the sheet bundle. Thereby, it happens less often that the pairs of rollers gather the air collected between adjacent ones of the sheets of the sheet bundle to the bound portion to thereby cause a slack to the sheets, and the occurrence of wrinkles or twists in the sheet bundle can be reduced. Also, the pair of rollers are separated from the sheet bundle before the bound portion passes the pair of rollers, whereby it happens less often that the pair of rollers are damaged by the bound portion, and the sheet bundle can be conveyed smoothly.Type: GrantFiled: January 23, 2009Date of Patent: July 27, 2010Assignee: Canon Kabushiki KaishaInventors: Hideki Kushida, Taro Ikeda, Hiroaki Takagishi, Kenichi Hayashi, Tomokazu Nakamura, Wataru Kawata, Hiromasa Katayama
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Publication number: 20100119259Abstract: A positioning roller is configured to be pressed against an abutment block by a reactive force produced when the positioning roller abuts on an S-D-direction abutment block.Type: ApplicationFiled: February 27, 2009Publication date: May 13, 2010Applicant: CANON KABUSHIKI KAISHAInventor: Hiromasa Katayama
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Patent number: 7684745Abstract: An image heating apparatus including an endless belt for heating an image on a recording material; a supporting member for supporting the belt; a coil for induction heat generation in the belt; control means for controlling a position of the belt in a widthwise direction by inclining the supporting member so as to maintain the position of the belt in the widthwise direction within a predetermined target range; and suppressing means for suppressing a variation of a distance between the belt and the coil with a variation of inclination of the supporting member.Type: GrantFiled: September 2, 2008Date of Patent: March 23, 2010Assignee: Canon Kabushiki KaishaInventors: Hiromitsu Uchida, Masahiko Yokota, Kazuhisa Okuda, Michiaki Endo, Takatoshi Chiba, Shinsuke Ubayashi, Hiromasa Katayama
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Patent number: 7578497Abstract: The sheet processing apparatus is equipped with a process tray on which sheets conveyed are stacked, a return belt which moves the sheets stacked on the process tray, a trailing edge stopper which receives an end portion of the sheets moved by the return belt, and a conveyance assist roller which comes into contact with the sheets on the upstream side of the return belt with respect to the sheet moving direction and imparts a load to the movement of the sheets. The return belt moves the sheets to which a load has been imparted by the conveyance assist roller and causes them to be abutted on the trailing edge stopper.Type: GrantFiled: July 17, 2008Date of Patent: August 25, 2009Assignee: Canon Kabushiki KaishaInventors: Wataru Kawata, Taro Ikeda, Hiroaki Takagishi, Kenichi Hayashi, Tomokazu Nakamura, Hideki Kushida, Hiromasa Katayama
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Patent number: 7546078Abstract: An image heating apparatus includes an endless belt for heating an image on a recording material at a nip; a pressing pad for pressing the belt at the nip; a supporting member for supporting the belt at an inner surface thereof, the supporting member being displaceable to move the belt in a widthwise direction of the belt; a lubricant application member for applying lubricant onto the inner surface of the belt; and displacing means for displacing the lubricant application member in accordance with a displacement of the supporting member.Type: GrantFiled: September 8, 2006Date of Patent: June 9, 2009Assignee: Canon Kabushiki KaishaInventors: Kazuhisa Okuda, Masahiko Yokota, Michiaki Endo, Shinsuke Ubayashi, Takatoshi Chiba, Hiromasa Katayama, Hiromitsu Uchida
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Publication number: 20090140483Abstract: When a sheet bundle is being conveyed by any one pair of plural pairs of rollers independently movable toward and away from the bundle sheet, before the bound portion of the sheet bundle passes the pair of rollers, the pair of rollers on the downstream side nearest to the bound portion are separated from the sheet bundle, and the pairs of rollers more downstream than that pair convey the sheet bundle. Thereby, it happens less often that the pairs of rollers gather the air collected between adjacent ones of the sheets of the sheet bundle to the bound portion to thereby cause a slack to the sheets, and the occurrence of wrinkles or twists in the sheet bundle can be reduced. Also, the pair of rollers are separated from the sheet bundle before the bound portion passes the pair of rollers, whereby it happens less often that the pair of rollers are damaged by the bound portion, and the sheet bundle can be conveyed smoothly.Type: ApplicationFiled: January 23, 2009Publication date: June 4, 2009Applicant: CANON KABUSHIKI KAISHAInventors: HIDEKI KUSHIDA, TARO IKEDA, HIROAKI TAKAGISHI, KENICHI HAYASHI, TOMOKAZU NAKAMURA, WATARU KAWATA, HIROMASA KATAYAMA
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Patent number: 7530560Abstract: When a sheet bundle is being conveyed by any one pair of plural pairs of rollers independently movable toward and away from the bundle sheet, before the bound portion of the sheet bundle passes the pair of rollers, the pair of rollers on the downstream side nearest to the bound portion are separated from the sheet bundle, and the pairs of rollers more downstream than that pair convey the sheet bundle. Thereby, it happens less often that the pairs of rollers gather the air collected between adjacent ones of the sheets of the sheet bundle to the bound portion to thereby cause a slack to the sheets, and the occurrence of wrinkles or twists in the sheet bundle can be reduced. Also, the pair of rollers are separated from the sheet bundle before the bound portion passes the pair of rollers, whereby it happens less often that the pair of rollers are damaged by the bound portion, and the sheet bundle can be conveyed smoothly.Type: GrantFiled: June 30, 2005Date of Patent: May 12, 2009Assignee: Canon Kabushiki KaishaInventors: Hideki Kushida, Taro Ikeda, Hiroaki Takagishi, Kenichi Hayashi, Tomokazu Nakamura, Wataru Kawata, Hiromasa Katayama
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Publication number: 20090074449Abstract: An image forming apparatus has an abutment roller which is provided at either end of a developing sleeve in a longitudinal direction and makes an SD gap (Gsd) between a photosensitive drum and a developing sleeve constant, an abutment block which is provided at either end of the photosensitive drum in a longitudinal direction and on which the abutment roller abuts, and a pressing spring which directly presses the abutment roller toward the abutment block. The stability of the SD gap (Gsd) and reduction of the driving load torque of the developing sleeve can be achieved to cope with both high image quality and durability of the image forming apparatus.Type: ApplicationFiled: September 10, 2008Publication date: March 19, 2009Applicant: CANON KABUSHIKI KAISHAInventor: Hiromasa Katayama