Patents by Inventor Cheol-young Han
Cheol-young Han 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: 8164763Abstract: An image forming apparatus including a printing unit which prints an image on paper, an exit path which connects an exit of the printing unit to an exit member which pushes the paper outside of the printing unit, a plurality of guide members which are arranged widthwise of the paper, each guide member having a first guide side which guides the paper coming out of the printing unit along the exit path, wherein each guide member is installed to be movable such that the first guide side rotates when the first guide side contacts the paper which comes out of the printing unit, and returns to its original position after the paper completely passes through the printing unit.Type: GrantFiled: February 20, 2009Date of Patent: April 24, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Kyung-shig Chung, Cheol-young Han
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Patent number: 7925194Abstract: A developing unit to supply toner to a photosensitive medium of an image forming apparatus to form an image thereon, including a housing to hold a toner of a predetermined color, a developing roller which is coupled to the housing to be rotatable in a direction opposite to a moving direction of the photosensitive medium, to supply the photosensitive medium with the toner, and to form the image by potential difference, and a regulating blade including a coupling end part coupled to the housing and a free end part double bent with regard to the coupling end part to contact the developing roller at a tip part thereof.Type: GrantFiled: May 29, 2007Date of Patent: April 12, 2011Assignee: SAMSUNG Electronics Co., Ltd.Inventors: Cheol-young Han, Hak-kyum Kim, Hae-seog Jo
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Patent number: 7721859Abstract: A rotary force controlling apparatus and an image forming apparatus including the same are provided. The rotary force controlling apparatus includes a clutch device having a shaft, and a rotary body mounted at one end of the shaft. A housing receives and rotates together with the shaft. A power transferring member is rotatably mounted in the housing and selectively rotates the housing by a clutch inserted between the housing and the power transferring member. A positioning unit protrudes from the periphery of the housing and positions a stop location of the rotary body. A solenoid unit is spaced apart from the clutch device and is selectively turned on and off. The positioning unit includes a first positioning unit that positions an initial location of the rotary body when the solenoid unit is turned on; and a plurality of second positioning units that are separated from the first positioning unit and stop the rotary body at a predetermined location when the solenoid unit is turned off.Type: GrantFiled: November 14, 2005Date of Patent: May 25, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Sung-dae Kim, Young-min Yoon, Cheol-young Han
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Patent number: 7697862Abstract: A high voltage switch device includes a plurality of switches installed between a high voltage power unit and a plurality of developing units. A plurality of cams are disposed on a cam shaft corresponding to the respective switches. The switches are selectively turned “on” and “off” as the cam shaft rotates.Type: GrantFiled: January 30, 2006Date of Patent: April 13, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Sung-dae Kim, Cheol-young Han, Young-min Yoon
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Patent number: 7610000Abstract: A developing device driver according to the present invention includes a developing roller gear connected to each developing roller to develop an electrostatic latent image formed on a photoconductive medium with developer having predetermined color, a driving source for generating power for rotating the developing roller gear, a driving gear driven by the power transmitted from the driving source, and a power switching gear provided with power from the driving gear and rotated along a circumference of the driving gear, and a rotation unit. The rotation unit rotates the power switching gear to place the power switching gear into contact with and separate the gear from the developing roller gears to selectively drive one developing roller.Type: GrantFiled: July 7, 2006Date of Patent: October 27, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Sung-dae Kim, Cheol-young Han
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Image forming apparatus having a power controlling device that controls power supplied to developers
Patent number: 7606517Abstract: Provided is an image forming apparatus for printing a desired image.Type: GrantFiled: January 31, 2006Date of Patent: October 20, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Sung-dae Kim, Cheol-young Han, Young-min Yoon -
Publication number: 20090161135Abstract: An image forming apparatus including a printing unit which prints an image on paper, an exit path which connects an exit of the printing unit to an exit member which pushes the paper outside of the printing unit, a plurality of guide members which are arranged widthwise of the paper, each guide member having a first guide side which guides the paper coming out of the printing unit along the exit path, wherein each guide member is installed to be movable such that the first guide side rotates when the first guide side contacts the paper which comes out of the printing unit, and returns to its original position after the paper completely passes through the printing unit.Type: ApplicationFiled: February 20, 2009Publication date: June 25, 2009Applicant: Samsung Electronics Co., Ltd.Inventors: Kyung-shig Chung, Cheol-young Han
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Publication number: 20080118280Abstract: A developing unit to supply toner to a photosensitive medium of an image forming apparatus to form an image thereon, including a housing to hold a toner of a predetermined color, a developing roller which is coupled to the housing to be rotatable in a direction opposite to a moving direction of the photosensitive medium, to supply the photosensitive medium with the toner, and to form the image by potential difference, and a regulating blade including a coupling end part coupled to the housing and a free end part double bent with regard to the coupling end part to contact the developing roller at a tip part thereof.Type: ApplicationFiled: May 29, 2007Publication date: May 22, 2008Applicant: Samsung Electronics Co., Ltd.Inventors: Cheol-young HAN, Hak-kyum Kim, Hae-seog Jo
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Patent number: 7376373Abstract: An electrophotographic image forming apparatus is provided that includes a plurality of developing units, a cam shaft, and a plurality of cams disposed on the cam shaft corresponding to the respective developing units. A power transmitting device disposed between the developing units and the cams selectively transmits rotational force from a driving source to the plurality of developing units.Type: GrantFiled: January 25, 2006Date of Patent: May 20, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Sung-dae Kim, Cheol-young Han, Hae-seog Jo, Young-min Yoon
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Publication number: 20070160390Abstract: A developing device driver according to the present invention includes a developing roller gear connected to each developing roller to develop an electrostatic latent image formed on a photoconductive medium with developer having predetermined color, a driving source for generating power for rotating the developing roller gear, a driving gear driven by the power transmitted from the driving source, and a power switching gear provided with power from the driving gear and rotated along a circumference of the driving gear, and a rotation unit. The rotation unit rotates the power switching gear to place the power switching gear into contact with and separate the gear from the developing roller gears to selectively drive one developing roller.Type: ApplicationFiled: July 7, 2006Publication date: July 12, 2007Inventors: Sung-dae Kim, Cheol-young Han
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Publication number: 20060257160Abstract: A high voltage switch device includes a plurality of switches installed between a high voltage power unit and a plurality of developing units. A plurality of cams are disposed on a cam shaft corresponding to the respective switches. The switches are selectively turned “on” and “off” as the cam shaft rotates.Type: ApplicationFiled: January 30, 2006Publication date: November 16, 2006Inventors: Sung-dae Kim, Cheol-young Han, Young-min Yoon
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Publication number: 20060238783Abstract: Provided is an image forming apparatus for printing a desired image.Type: ApplicationFiled: January 31, 2006Publication date: October 26, 2006Inventors: Sung-dae Kim, Cheol-young Han, Young-min Yoon
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Publication number: 20060239716Abstract: An electrophotographic image forming apparatus is provided that includes a plurality of developing units, a cam shaft, and a plurality of cams disposed on the cam shaft corresponding to the respective developing units. A power transmitting device disposed between the developing units and the cams selectively transmits rotational force from a driving source to the plurality of developing units.Type: ApplicationFiled: January 25, 2006Publication date: October 26, 2006Inventors: Sung-dae Kim, Cheol-young Han, Hae-seog Jo, Young-min Yoon
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Publication number: 20060225983Abstract: A rotary force controlling apparatus and an image forming apparatus including the same are provided. The rotary force controlling apparatus includes a clutch device having a shaft, and a rotary body mounted at one end of the shaft. A housing receives and rotates together with the shaft. A power transferring member is rotatably mounted in the housing and selectively rotates the housing by a clutch inserted between the housing and the power transferring member. A positioning unit protrudes from the periphery of the housing and positions a stop location of the rotary body. A solenoid unit is spaced apart from the clutch device and is selectively turned on and off. The positioning unit includes a first positioning unit that positions an initial location of the rotary body when the solenoid unit is turned on; and a plurality of second positioning units that are separated from the first positioning unit and stop the rotary body at a predetermined location when the solenoid unit is turned off.Type: ApplicationFiled: November 14, 2005Publication date: October 12, 2006Inventors: Sung-dae Kim, Young-min Yoon, Cheol-young Han
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Patent number: 6907219Abstract: Fusing equipment of an image forming apparatus, includes: a fusing roller fixing a toner image on a printer paper and comprising a supporting layer formed at an inner portion of the fusing roller, a separating layer formed at an outermost portion of the fusing roller, an a heating layer formed between the supporting layer and the separating layer to supply heat; a thermistor detecting a temperature of the fusing roller to control the heating layer; and a pressing roller pressing the printing paper against an end of the fusing roller during a rotational movement of the fusing roller while being in contact with the fusing roller.Type: GrantFiled: April 23, 2003Date of Patent: June 14, 2005Assignee: Samsung Electronics Co., LTDInventors: Yong-geun Kim, Cheol-young Han
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Patent number: 6862423Abstract: A fusing and fixing unit used with an image forming apparatus including a fusing roller and an infrared heat source. The fusing roller has a main member that has hollow portions therein and is made of an opaque material and an infrared absorbent layer that is formed on the inner surface of the main member. The infrared heat source is installed inside the fusing roller and generates radiant heat having an infrared wavelength.Type: GrantFiled: January 14, 2003Date of Patent: March 1, 2005Assignee: Samsung Electronics Co., Ltd.Inventors: Yong-geun Kim, Cheol-young Han
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Patent number: 6834170Abstract: A developing apparatus includes sealing members which are installed on both inside walls of a housing and closely contact the housing, a developer roller, and a blade to prevent the toner contained in the housing from leaking out. Each sealing member includes a first sealing member and a second sealing member. The first sealing member has a side part that elastically and closely contacts one inside wall of the housing and a short side part of the blade, and a front part that elastically and closely contacts the outer circumference of the developer roller. The second sealing member overlaps with the first sealing member and has a front part that elastically and closely contacts an inside surface of the blade and the outer circumference of the developer roller. Therefore, deterioration of a close contact of the sealing members due to compression and deformation of the sealing members may be prevented. Accordingly, a developing apparatus is configured to prevent leakage of toner.Type: GrantFiled: January 3, 2003Date of Patent: December 21, 2004Assignee: Samsung Electronics Co., Ltd.Inventors: Sam-seuk Choi, Cheol-young Han
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Publication number: 20040095593Abstract: An image forming apparatus including a printing unit which prints an image on paper, an exit path which connects an exit of the printing unit to an exit member which pushes the paper outside of the printing unit, a plurality of guide members which are arranged widthwise of the paper, each guide member having a first guide side which guides the paper coming out of the printing unit along the exit path, wherein each guide member is installed to be movable such that the first guide side rotates when the first guide side contacts the paper which comes out of the printing unit, and returns to its original position after the paper completely passes through the printing unit.Type: ApplicationFiled: June 25, 2003Publication date: May 20, 2004Applicant: Samsung Electronics Co., Ltd.Inventors: Kyung-Shig Chung, Cheol-Young Han
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Publication number: 20040001731Abstract: A direct heating type of fusing equipment of an image forming apparatus includes a fusing roller that has a supporting layer formed inside of the fusing roller, a separating layer formed on an outermost portion of the fusing roller, and a heating layer formed between the supporting layer and the separating layer to supply heat; a thermistor being in contact with an outermost surface of the fusing roller to detect a temperature of the surface of the fusing roller; and a pressing roller pressing a printing paper against the fusing roller while rotating together with the fusing roller and being in contact therewith. The heating layer includes a hot wire wound around an outer circumference of the supporting layer; an insulating material formed between the supporting layer and the hot wire; and an insulation resilient layer disposed in a first gap formed between windings of the hot wire created after the winding of the hot wire and also disposed in a second gap formed between the hot wire and the separating layer.Type: ApplicationFiled: April 23, 2003Publication date: January 1, 2004Applicant: SAMSUNG Electronics Co., Ltd. of Republic of KoreaInventors: Yong-geun Kim, Cheol-young Han
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Publication number: 20030231904Abstract: A developing apparatus includes sealing members which are installed on both inside walls of a housing and closely contact the housing, a developer roller, and a blade to prevent the toner contained in the housing from leaking out. Each sealing member includes a first sealing member and a second sealing member. The first sealing member has a side part that elastically and closely contacts one inside wall of the housing and a short side part of the blade, and a front part that elastically and closely contacts the outer circumference of the developer roller. The second sealing member overlaps with the first sealing member and has a front part that elastically and closely contacts an inside surface of the blade and the outer circumference of the developer roller. Therefore, deterioration of a close contact of the sealing members due to compression and deformation of the sealing members may be prevented. Accordingly, a developing apparatus is configured to prevent leakage of toner.Type: ApplicationFiled: January 3, 2003Publication date: December 18, 2003Applicant: Samsung Electronics Co., Ltd.Inventors: Sam-seuk Choi, Cheol-young Han