Patents by Inventor Gun-soo Chang
Gun-soo Chang 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: 10466621Abstract: A developing cartridge includes: a photosensitive unit; a developing unit coupled to the photosensitive unit to be movable between a release position and a developing position; an elastic member to provide an elastic force in a direction to maintain the developing unit at the developing position; a movable member including a gear portion, the movable member and capable of moving to a first position to move the developing unit to the release position and second position to move the developing unit to the developing position; and a switching member connected to a driving gear, wherein as the driving gear rotates in a first direction or a second direction, the switching member is switched between a third position at which the switching member is connected to the gear portion to move the movable member from the second position to the first position and a fourth position at which the switching member is spaced apart from the gear portion to allow the movable member to move from the first position to the second posType: GrantFiled: July 31, 2018Date of Patent: November 5, 2019Assignee: HP PRINTING KOREA CO., LTD.Inventors: Ho-jin Jang, Young-chae Kim, Yun-kyu Sim, Gun-soo Chang
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Publication number: 20180335720Abstract: A developing cartridge includes: a photosensitive unit; a developing unit coupled to the photosensitive unit to be movable between a release position and a developing position; an elastic member to provide an elastic force in a direction to maintain the developing unit at the developing position; a movable member including a gear portion, the movable member and capable of moving to a first position to move the developing unit to the release position and second position to move the developing unit to the developing position; and a switching member connected to a driving gear, wherein as the driving gear rotates in a first direction or a second direction, the switching member is switched between a third position at which the switching member is connected to the gear portion to move the movable member from the second position to the first position and a fourth position at which the switching member is spaced apart from the gear portion to allow the movable member to move from the first position to the second posType: ApplicationFiled: July 31, 2018Publication date: November 22, 2018Applicant: HP Printing Korea Co., LTD.Inventors: Ho-jin Jang, Young-chae Kim, Yun-kyu Sim, Gun-soo Chang
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Publication number: 20180046129Abstract: Provided is a development cartridge capable of being detachably attached to a main body of an image forming apparatus, the development cartridge including a developing roller; a driving power receiving member configured to rotate in a first direction or a second direction by receiving a driving power from the main body; and a power delivery member configured to connect the driving power receiving member to the developing roller and to deliver only torque of the driving power receiving member in the first direction to the developing roller.Type: ApplicationFiled: February 24, 2017Publication date: February 15, 2018Applicant: S-PRINTING SOLUTION CO., LTD.Inventors: Yun-kyu SIM, Young-chae Kim, Gun-soo Chang, Ho-jin Jang
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Patent number: 8787792Abstract: A process cartridge usable with an image forming apparatus includes a developing member, a photosensitive medium to face the developing member, a pair of supporting plates to rotatably support the developing member and the photosensitive medium; a center moving member rotatably disposed on the supporting plate, the center moving member having a first position in which the photosensitive medium contacts the developing member and a second position in which the photosensitive medium is spaced apart from the developing member; and a separation restraining member formed so that when the center moving member locates at the second position, the separation restraining member restrains the center moving member from moving from the second position.Type: GrantFiled: February 1, 2013Date of Patent: July 22, 2014Assignee: Samsung Electronics Co., LtdInventors: Jong-in Kim, Gun-soo Chang, Byeong-no Jeong, Yong-hun Kim, Dong-uk Kim
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Publication number: 20130259523Abstract: A process cartridge usable with an image forming apparatus includes a developing member, a photosensitive medium to face the developing member, a pair of supporting plates to rotatably support the developing member and the photosensitive medium; a center moving member rotatably disposed on the supporting plate, the center moving member having a first position in which the photosensitive medium contacts the developing member and a second position in which the photosensitive medium is spaced apart from the developing member; and a separation restraining member formed so that when the center moving member locates at the second position, the separation restraining member restrains the center moving member from moving from the second position.Type: ApplicationFiled: February 1, 2013Publication date: October 3, 2013Applicant: Samsung Electronics Co., Ltd.Inventors: Jong-in KIM, Gun-soo CHANG, Byeong-no JEONG, Yong-hun KIM, Dong-uk KIM
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Patent number: 8391747Abstract: A process cartridge usable with an image forming apparatus includes a developing member, a photosensitive medium to face the developing member, a pair of supporting plates to rotatably support the developing member and the photosensitive medium; a center moving member rotatably disposed on the supporting plate, the center moving member having a first position in which the photosensitive medium contacts the developing member and a second position in which the photosensitive medium is spaced apart from the developing member; and a separation restraining member formed so that when the center moving member locates at the second position, the separation restraining member restrains the center moving member from moving from the second position.Type: GrantFiled: March 22, 2010Date of Patent: March 5, 2013Assignee: SAMSUNG Electronics Co., Ltd.Inventors: Jong-in Kim, Gun-soo Chang, Byeong-no Jeong, Yong-hun Kim, Dong-uk Kim
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Patent number: 8050581Abstract: An image forming apparatus and a control method thereof are disclosed. A charge unit charges a surface of an organic photo conductor (OPC) to a predetermined electric potential. A developing unit develops an electrostatic latent image formed on the surface of the OPC by coating a developer on the same. A power supply unit supplies power to the charge unit and the developing unit. A control unit regulates the power supplied to the charge unit and the developing unit. After a developing process in the developing unit, the control unit regulates the power applied to at least one of the charge unit and the developing unit so as to collect a residual developer on the surface of the OPC to the developing unit. Accordingly, contamination of the charge unit and the transfer unit can be prevented and an image of a good quality can be achieved.Type: GrantFiled: November 23, 2009Date of Patent: November 1, 2011Assignee: SAMSUNG Electronics Co., LtdInventors: Gun Soo Chang, Dong Cheol Ahn
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Patent number: 7912403Abstract: An image forming apparatus includes a main frame having a first driving force transmitting part, and a first electrode to supply power, a developing cartridge mounted to the main frame, and having a second driving force transmitting part engaged to the first driving force transmitting part to receive a driving force, and a second electrode electrically connected with the first electrode, and a pressing member disposed to the main frame to regulate a widthwise direction movement of the developing cartridge mounted to the main frame to guide an engagement between the first and second driving force transmitting parts, and an electrical connection between the first and second electrodes.Type: GrantFiled: October 5, 2007Date of Patent: March 22, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Young-min Kim, Gun-soo Chang
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Publication number: 20110026967Abstract: A process cartridge usable with an image forming apparatus includes a developing member, a photosensitive medium to face the developing member, a pair of supporting plates to rotatably support the developing member and the photosensitive medium; a center moving member rotatably disposed on the supporting plate, the center moving member having a first position in which the photosensitive medium contacts the developing member and a second position in which the photosensitive medium is spaced apart from the developing member; and a separation restraining member formed so that when the center moving member locates at the second position, the separation restraining member restrains the center moving member from moving from the second position.Type: ApplicationFiled: March 22, 2010Publication date: February 3, 2011Applicant: Samsung Electronics Co., Ltd.Inventors: Jong-in Kim, Gun-soo Chang, Byeong-no Jeong, Yong-hun Kim, Dong-uk Kim
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Publication number: 20100135685Abstract: An image forming apparatus and a control method thereof are disclosed. A charge unit charges a surface of an organic photo conductor (OPC) to a predetermined electric potential. A developing unit develops an electrostatic latent image formed on the surface of the OPC by coating a developer on the same. A power supply unit supplies power to the charge unit and the developing unit. A control unit regulates the power supplied to the charge unit and the developing unit. After a developing process in the developing unit, the control unit regulates the power applied to at least one of the charge unit and the developing unit so as to collect a residual developer on the surface of the OPC to the developing unit. Accordingly, contamination of the charge unit and the transfer unit can be prevented and an image of a good quality can be achieved.Type: ApplicationFiled: November 23, 2009Publication date: June 3, 2010Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Gun Soo CHANG, Dong Cheol Ahn
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Patent number: 7680434Abstract: A developing cartridge includes a main frame including a photosensitive medium, and a charging member frame including a charging member to charge the photosensitive medium and detachably disposed at the main frame. The main frame includes a plurality of frame reference grooves, and the charging member frame includes a plurality of frame reference projections to be inserted into the plurality of frame reference grooves of the main frame.Type: GrantFiled: November 16, 2007Date of Patent: March 16, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Jun-hee Lee, Gun-soo Chang
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Publication number: 20080226340Abstract: A developing cartridge includes a main frame including a photosensitive medium, and a charging member frame including a charging member to charge the photosensitive medium and detachably disposed at the main frame. The main frame includes a plurality of frame reference grooves, and the charging member frame includes a plurality of frame reference projections to be inserted into the plurality of frame reference grooves of the main frame.Type: ApplicationFiled: November 16, 2007Publication date: September 18, 2008Applicant: Samsung Electronics Co., Ltd.Inventors: Jun-hee Lee, Gun-soo Chang
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Publication number: 20080170875Abstract: An image forming apparatus includes a main frame having a first driving force transmitting part, and a first electrode to supply power, a developing cartridge mounted to the main frame, and having a second driving force transmitting part engaged to the first driving force transmitting part to receive a driving force, and a second electrode electrically connected with the first electrode, and a pressing member disposed to the main frame to regulate a widthwise direction movement of the developing cartridge mounted to the main frame to guide an engagement between the first and second driving force transmitting parts, and an electrical connection between the first and second electrodes.Type: ApplicationFiled: October 5, 2007Publication date: July 17, 2008Applicant: Samsung Electronics Co., Ltd.Inventors: Young-min Kim, Gun-soo Chang