Patents by Inventor Tatsuyuki Sasaki
Tatsuyuki Sasaki 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: 8600275Abstract: A fixing device having: a heating roller and a presser that form a fixing nip portion therebetween; a pair of brackets having holes for supporting both end portions of the heating roller; a biasing member for pressing the presser against the heating roller to form the fixing nip portion; and a pair of semicircular arc slide bearings that are fitted in the holes of the respective brackets so as to be located between the respective brackets and the heating roller, on an opposite side of the heating roller to a side thereof pressed by the presser.Type: GrantFiled: March 17, 2011Date of Patent: December 3, 2013Assignee: Konica Minolta Business Technologies, Inc.Inventor: Tatsuyuki Sasaki
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Patent number: 8478171Abstract: A toner bottle includes a toner accommodating container, an inner lid including an inner discharge port, a measurement shutter member movable between an accumulation position where toner is accumulated in space formed between the measurement shutter member and the inner discharge port, and a discharge position where the toner accumulated in the space is discharged, an inner discharge port sealing member, and an outer lid for rotatably supporting the toner accommodating container in a state that the outer lid surrounds the inner discharge port. The outer lid has a shutter opening and closing inner peripheral surface where a restraint portion for restraining the measurement shutter member at the accumulation position, and a non-restraint portion capable of moving the measurement shutter member to the discharge position so that an outer surface of the measurement shutter member is abutted with the non-restraint portion are arranged in the circumferential direction.Type: GrantFiled: September 14, 2010Date of Patent: July 2, 2013Assignee: Konica Minolta Business Technologies, Inc.Inventor: Tatsuyuki Sasaki
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Patent number: 8447215Abstract: An image forming apparatus includes a developing device that uses a developer carrier to advance to an image carrier a developer including a toner and a carrier and supplies the toner to the image carrier by applying a developing bias between the developer carrier and the image carrier. In the image forming apparatus, the following operation is performed before the developer in the developing device is taken out. The toner is supplied to the image carrier by applying the developing bias between the developer carrier and the image carrier, the developing bias increased in a direction to supply the toner to the image carrier. The toner supplied onto the image carrier is not transferred to a transfer receiving material but is advanced into a toner recovery device for recovery. The recovered toner is prevented from being returned to the developing device.Type: GrantFiled: March 11, 2011Date of Patent: May 21, 2013Assignee: Konica Minolta Business Technologies, Inc.Inventors: Hideyuki Kurahashi, Takashi Gonda, Yoshiki Omichi, Tatsuyuki Sasaki, Masashi Kawai, Fumio Masuda
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Patent number: 8340559Abstract: A fixing device comprises: a heating rotary member and a pressurizing rotary member, which form a nip, and guiding members for guiding a recording sheet that has passed through the nip. In a cross-section perpendicular to a rotation axis of the heating rotary member, La connects axial centers of two rotary members, Lb is perpendicular to La, P is on a guiding surface of one of the guiding members and horizontally closer to the pressurizing rotary member than any other points thereon, said one of the guiding members being closer to the heating rotary member than the other, Lc passes through P and is tangent to an outer circumference of the heating rotary member near the nip, and D is a P-La distance. Here, heating rotary member diameter×1.6?D<heating rotary member diameter×2.4. Above the nip, Lc leans further toward the heating rotary member than Lb, and 2.2°?angle between Lc and Lb<6.5°.Type: GrantFiled: February 25, 2011Date of Patent: December 25, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Masayoshi Kuroda, Tatsuyuki Sasaki, Takuya Wada, Haruki Iwatsuki
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Publication number: 20110229223Abstract: A fixing device having: a heating roller and a presser that form a fixing nip portion therebetween; a pair of brackets having holes for supporting both end portions of the heating roller; a biasing member for pressing the presser against the heating roller to form the fixing nip portion; and a pair of semicircular arc slide bearings that are fitted in the holes of the respective brackets so as to be located between the respective brackets and the heating roller, on an opposite side of the heating roller to a side thereof pressed by the presser.Type: ApplicationFiled: March 17, 2011Publication date: September 22, 2011Applicant: Konica Minolta Business Technologies, Inc.Inventor: Tatsuyuki SASAKI
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Publication number: 20110229818Abstract: An image forming apparatus includes a developing device that uses a developer carrier to advance to an image carrier a developer including a toner and a carrier and supplies the toner to the image carrier by applying a developing bias between the developer carrier and the image carrier. In the image forming apparatus, the following operation is performed before the developer in the developing device is taken out. The toner is supplied to the image carrier by applying the developing bias between the developer carrier and the image carrier, the developing bias increased in a direction to supply the toner to the image carrier. The toner supplied onto the image carrier is not transferred to a transfer receiving material but is advanced into a toner recovery device for recovery. The recovered toner is prevented from being returned to the developing device.Type: ApplicationFiled: March 11, 2011Publication date: September 22, 2011Applicant: Konica Minolta Business Technologies, Inc.Inventors: Hideyuki KURAHASHI, Takashi Gonda, Yoshiki Omichi, Tatsuyuki Sasaki, Masashi Kawai, Fumio Masuda
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Publication number: 20110211878Abstract: A fixing device comprises: a heating rotary member and a pressurizing rotary member, which form a nip, and guiding members for guiding a recording sheet that has passed through the nip. In a cross-section perpendicular to a rotation axis of the heating rotary member, La connects axial centers of two rotary members, Lb is perpendicular to La, P is on a guiding surface of one of the guiding members and horizontally closer to the pressurizing rotary member than any other points thereon, said one of the guiding members being closer to the heating rotary member than the other, Lc passes through P and is tangent to an outer circumference of the heating rotary member near the nip, and D is a P-La distance. Here, heating rotary member diameter×1.6?D<heating rotary member diameter×2.4. Above the nip, Lc leans further toward the heating rotary member than Lb, and 2.2°?angle between Lc and Lb<6.5°.Type: ApplicationFiled: February 25, 2011Publication date: September 1, 2011Applicant: Konica Minolta Business Technologies, Inc.Inventors: Masayoshi KURODA, Tatsuyuki Sasaki, Takuya Wada, Haruki Iwatsuki
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Publication number: 20110064479Abstract: A toner bottle includes a toner accommodating container, an inner lid including an inner discharge port, a measurement shutter member movable between an accumulation position where toner is accumulated in space formed between the measurement shutter member and the inner discharge port, and a discharge position where the toner accumulated in the space is discharged, an inner discharge port sealing member, and an outer lid for rotatably supporting the toner accommodating container in a state that the outer lid surrounds the inner discharge port. The outer lid has a shutter opening and closing inner peripheral surface where a restraint portion for restraining the measurement shutter member at the accumulation position, and a non-restraint portion capable of moving the measurement shutter member to the discharge position so that an outer surface of the measurement shutter member is abutted with the non-restraint portion are arranged in the circumferential direction.Type: ApplicationFiled: September 14, 2010Publication date: March 17, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventor: Tatsuyuki SASAKI
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Patent number: 7663792Abstract: A reflection mirror unit for a document on a platen includes first and second reflection mirrors, a base frame formed of a plate member and having a sliding portion adapted to slidably engage a guide rail located in a sub-scanning direction for the document on the platen, and a mirror support frame formed of a plate member. The mirror support frame includes a mirror mounting portion for supporting the first and second reflection mirrors opposite to each other with a predetermined angle. First and second coupling portions are formed on the base frame and the mirror support frame to couple together.Type: GrantFiled: July 19, 2007Date of Patent: February 16, 2010Assignee: Nisca CorporationInventors: Motoaki Nakayama, Kenichi Yui, Tatsuyuki Sasaki
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Publication number: 20080018971Abstract: A reflection mirror unit for a document on a platen includes first and second reflection mirrors, a base frame formed of a plate member and having a sliding portion adapted to slidably engage a guide rail located in a sub-scanning direction for the document on the platen, and a mirror support frame formed of a plate member. The mirror support frame includes a mirror mounting portion for supporting the first and second reflection mirrors opposite to each other with a predetermined angle. First and second coupling portions are formed on the base frame and the mirror support frame to couple together.Type: ApplicationFiled: July 19, 2007Publication date: January 24, 2008Applicant: NISCA CORPORATIONInventors: Motoaki Nakayama, Kenichi Yui, Tatsuyuki Sasaki