Patents by Inventor Keng Leong Ng
Keng Leong Ng 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: 10889135Abstract: A mechanism for an ADF having upper and lower trays, a base connecting the trays, and a cover pivotally connected to the upper tray includes a housing provided within the base and movable relative thereto. A transmission has a gripping position for transporting paper along a path from the upper tray to the lower tray and a release position allowing a paper jam along the path to be remedied. The cover is pivotable between a first condition maintaining the transmission in the gripping position and a second condition allowing the housing to move relative to the trays to place the transmission in the release position.Type: GrantFiled: September 12, 2016Date of Patent: January 12, 2021Assignee: Hewlett-Packard Development Company, L.P.Inventors: Ryan M Smith, Keng Leong Ng, Eric Andersen
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Patent number: 10855861Abstract: One example includes a device that is comprised of a cover housing, a reflective sheet, a coupler, and a fastener. The reflective sheet may hold media against a planar transparent scanning area of the device. The coupler may removably attach the reflective sheet to the cover housing, the coupler having a resilient member to exert an axial restoring force between the reflective sheet and the cover housing. The fastener may fix the coupler to the reflective sheet.Type: GrantFiled: September 9, 2016Date of Patent: December 1, 2020Assignee: Hewlett-Packard Development Company, L.P.Inventors: Rene Valenzuela, Ryan M Smith, Keng Leong Ng
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Publication number: 20190230238Abstract: One example includes a device that is comprised of a cover housing, a reflective sheet, a coupler, and a fastener. The reflective sheet may hold media against a planar transparent scanning area of the device. The coupler may removably attach the reflective sheet to the cover housing, the coupler having a resilient member to exert an axial restoring force between the reflective sheet and the cover housing. The fastener may fix the coupler to the reflective sheet.Type: ApplicationFiled: September 9, 2016Publication date: July 25, 2019Inventors: Rene Valenzuela, Ryan M Smith, Keng Leong Ng
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Publication number: 20190217636Abstract: A mechanism for an ADF having upper and lower trays, a base connecting the trays, and a cover pivotally connected to the upper tray includes a housing provided within the base and movable relative thereto. A transmission has a gripping position for transporting paper along a path from the upper tray to the lower tray and a release position allowing a paper jam along the path to be remedied. The cover is pivotable between a first condition maintaining the transmission in the gripping position and a second condition allowing the housing to move relative to the trays to place the transmission in the release position.Type: ApplicationFiled: September 12, 2016Publication date: July 18, 2019Inventors: Ryan M Smith, Keng Leong Ng, Eric Andersen
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Patent number: 8931164Abstract: A method of making and using a printer comprising a duplexing unit that pivots along a horizontal plane for media path access. The duplexing unit does not contain any motor driven rollers for moving a media sheet therethrough. The duplexing unit's vertical axis hinge allows the duplexing unit to swing open and closed horizontally.Type: GrantFiled: May 31, 2011Date of Patent: January 13, 2015Assignee: Eastman Kodak CompanyInventors: Siew Pern Chuang, Richard A. Murray, Venkatesh Mysore Nagaraja Rao, Keng Leong Ng
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Patent number: 8649073Abstract: A scanner assembly includes an automatic document feeder and a first scanner. The automatic document feeder defines a media pathway that includes an input portion and an output portion having an exit roller. The first scanner is positioned along the media pathway upstream from the exit roller. In a first assembled configuration, the assembly is configured to scan both a first side and a second side of the media via the first scanner. In a second assembled configuration, the assembly additionally includes a second scanner positioned along the output portion and interposed between the first scanner and the exit roller. In the second configuration, the assembly is configured to scan the first side of media via the first scanner and to scan the second side of media via the second scanner.Type: GrantFiled: June 10, 2011Date of Patent: February 11, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Thaddie Natalaray, Kyi Thu Maung, U Kyaw Thu Ra, Tok Wee Hien, Yeo Meng Hui, Lam Siew Hong, Jeoffrey Goh Choon Kiat, Thong Wei Leong, Chiam Ter Wei, Long C. Doan, Jeffrey C. Madsen, Curtis J. Behrend, James C Albritton-Mcdonald, Keng-Leong Ng
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Patent number: 8613440Abstract: An automatic document feeding device including a pick motor coupled with a pick assembly, a deskew motor coupled with a deskew assembly, a sensor assembly coupled with a main media path and the deskew motor, and a feed motor coupled with a feed assembly. The deskew motor drives the deskew assembly, the deskew assembly deskewing the media sheet and moving the media sheet from the pick assembly to the feed assembly, the deskew assembly moving independently of the pick assembly and the feed assembly. The sensor assembly includes a plurality of sensors. The sensor assembly senses the media sheet moving along the main media path and sends at least one signal to a computer. The computer, based on the at least one signal, sends, an activation signal to at least one of the pick, deskew and feed motors and the first scanner.Type: GrantFiled: July 11, 2011Date of Patent: December 24, 2013Assignee: Hewlett-Packard Development Company, L.P.Inventors: Long C Doan, Thaddie Natalaray, Kyi Thu Maung, Jeffrey C Madsen, Jim Albritton-Mcdonald, Jeoffrey Goh, Hin Peng Teoh, Curtis J Behrend, Keng Leong Ng
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Patent number: 8591022Abstract: A pivotable duplexing unit is attached to the wall of a printer using a hinge having an axis that is substantially perpendicular to the base. A latch and catch holds the pivotable duplexing unit in a closed position relative to the wall of the printing apparatus. The wall includes a support member for the hinge, and the pivotable duplexing unit further includes a pin for pivoting in a support member of the hinge. The support member includes a bearing surface that is substantially parallel to the base. The pin member includes an end that makes pivotable contact with the bearing surface.Type: GrantFiled: May 31, 2011Date of Patent: November 26, 2013Assignee: Eastman Kodak CompanyInventors: Siew Pern Chuang, Richard A. Murray, Venkatesh Mysore Nagaraja Rao, Keng Leong Ng
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Patent number: 8544840Abstract: An automatic document feeder with a drive system that can efficiently handle double-side scanning and accommodate more than one timing sequence for sequentially picking individual sheets from a stack using only two motors—a pick motor and a media motor. The automatic document feeder includes a pickup unit with a pick roller, a set of de-skew rollers, a main media path configured to guide a media sheet from the pickup unit to a scanning region and from the scanning region to an output tray, and a switch-back path configured to guide the media sheet back into the main media path. The drive system is operable to provide a high-speed picking mode and a delayed picking mode. In the high-speed picking mode, the pickup unit is driven by the pick motor to pull a subsequent media sheet from a stack of media sheet as soon as a previously pulled media sheet has passed the pick roller.Type: GrantFiled: April 30, 2007Date of Patent: October 1, 2013Assignee: Hewlett-Packard Development Company, L.P.Inventors: Keng Leong Ng, Thaddie Natalaray, Kyi Thu Maung, Toh Tung Wong, Wayne E Foote, Jeffrey C Madsen
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Publication number: 20130015621Abstract: An automatic document feeding device including a pick motor coupled with a pick assembly, a deskew motor coupled with a deskew assembly, a sensor assembly coupled with a main media path and the deskew motor, and a feed motor coupled with a feed assembly. The deskew motor drives the deskew assembly, the deskew assembly deskewing the media sheet and moving the media sheet from the pick assembly to the feed assembly, the deskew assembly moving independently of the pick assembly and the feed assembly. The sensor assembly includes a plurality of sensors. The sensor assembly senses the media sheet moving along the main media path and sends at least one signal to a computer. The computer, based on the at least one signal, sends, an activation signal to at least one of the pick, deskew and feed motors and the first scanner.Type: ApplicationFiled: July 11, 2011Publication date: January 17, 2013Inventors: Long C. Doan, Thaddie Natalaray, Kyi Thu Maung, Jeffrey C. Madsen, Jim Albritton-McDonald, Jeoffrey Goh, Hin Peng Teoh, Curtis J. Behrend, Keng Leong Ng
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Publication number: 20120314266Abstract: A scanner assembly includes an automatic document feeder and a first scanner. The automatic document feeder defines a media pathway that includes an input portion and an output portion having an exit roller. The first scanner is positioned along the media pathway upstream from the exit roller. In a first assembled configuration, the assembly is configured to scan both a first side and a second side of the media via the first scanner. In a second assembled configuration, the assembly additionally includes a second scanner positioned along the output portion and interposed between the first scanner and the exit roller. In the second configuration, the assembly is configured to scan the first side of media via the first scanner and to scan the second side of media via the second scanner.Type: ApplicationFiled: June 10, 2011Publication date: December 13, 2012Inventors: Thaddie Natalaray, Kyi Thu Maung, U Kyaw Thu Ra, Tok Wee Hien, Yeo Meng Hui, Lam Siew Hong, Jeoffrey Goh Choon Kiat, Thong Wei Leong, Chiam Ter Wei, Long C. Doan, Jeffrey C. Madsen, Curtis J. Behrend, James C. Albritton-Mcdonald, Keng-Leong Ng
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Publication number: 20120304436Abstract: A method of making and using a printer comprising a duplexing unit that pivots along a horizontal plane for media path access. The duplexing unit does not contain any motor driven rollers for moving a media sheet therethrough. The duplexing unit's vertical axis hinge allows the duplexing unit to swing open and closed horizontally.Type: ApplicationFiled: May 31, 2011Publication date: December 6, 2012Inventors: Siew Pern Chuang, Richard A. Murray, Venkatesh Mysore Nagaraja Rao, Keng Leong Ng
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Publication number: 20120306978Abstract: A pivotable duplexing unit is attached to the wall of a printer using a hinge having an axis that is substantially perpendicular to the base. A latch and catch holds the pivotable duplexing unit in a closed position relative to the wall of the printing apparatus. The wall includes a support member for the hinge, and the pivotable duplexing unit further includes a pin for pivoting in a support member of the hinge. The support member includes a bearing surface that is substantially parallel to the base. The pin member includes an end that makes pivotable contact with the bearing surface.Type: ApplicationFiled: May 31, 2011Publication date: December 6, 2012Inventors: Siew Pern Chuang, Richard A. Murray, Venkatesh Mysore Nagaraja Rao, Keng Leong Ng
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Publication number: 20080265485Abstract: A sheet discharge roller assembly for a sheet feeding apparatus includes an upper cylindrical exit roller mounted on a rotatable drive shaft and a lower cylindrical pinch roller having a wheel attached to one end. The pinch roller has a length that is longer than the length of the exit roller and is moveable into contact with the exit roller so as to form a nip for gripping a print media to be discharged. The wheel has a diameter that is larger than that of the pinch roller and an outer circumferential edge composed of a plurality of protruding contact portions arranged in a radial pattern. The wheel is positioned so that the wheel can contact the media sheet being gripped and cause the sheet to deform temporarily, thereby making the sheet more rigid.Type: ApplicationFiled: April 26, 2007Publication date: October 30, 2008Inventors: Toh Tung Wong, Keng Leong NG, Wayne E. Foote, Jeffrey C. Madsen, Thaddie Natalaray, Kyi Thu Maung
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Publication number: 20080265489Abstract: An automatic document feeder with a drive system that can efficiently handle double-side scanning and accommodate more than one timing sequence for sequentially picking individual sheets from a stack using only two motors—a pick motor and a media motor. The automatic document feeder includes a pickup unit with a pick roller, a set of de-skew rollers, a main media path configured to guide a media sheet from the pickup unit to a scanning region and from the scanning region to an output tray, and a switch-back path configured to guide the media sheet back into the main media path. The drive system is operable to provide a high-speed picking mode and a delayed picking mode. In the high-speed picking mode, the pickup unit is driven by the pick motor to pull a subsequent media sheet from a stack of media sheet as soon as a previously pulled media sheet has passed the pick roller.Type: ApplicationFiled: April 30, 2007Publication date: October 30, 2008Inventors: Keng Leong Ng, Thaddie Natalaray, Kyi Thu Maung, Toh Tung Wong, Wayne E. Foote, Jeffrey C. Madsen
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Patent number: 7418766Abstract: An upper piggybacked unit of a tandem unit is provided with a hinge unit and at least one motion lock to prevent the upper unit from falling away from the lower unit when it is tandemly coupled to the lower unit and the lower unit is pivoted to a non-horizontal position. The motion lock may inhibit rotation and/or translation of the upper unit. The motion lock may also be self-actuating, such as a gravity dependent lock mechanism. A lock override mechanism may be provided to allow the lock to yield to excessive force without causing damage. The lock enable condition may be automatically reset after the override condition so that no special knowledge or action on the part of the user is required to return the hinge to normal operation.Type: GrantFiled: December 22, 2004Date of Patent: September 2, 2008Assignee: Xerox CorporationInventors: Aaron T. Nelson, Keng Leong Ng, Brent R. Jones, Yin Mei (Regina) Sia, Sheau Ming Ng
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Patent number: 7201524Abstract: A media path control device has two sets of parallel arms with opposing rollers to manipulate the movement of print media. The arms are moveable in a substantially vertical plane through motors. The arms can be of different lengths to establish an optimal trajectory or height of the media to change the trajectory or travel path of the media. The rollers are reversible to change the trajectory or travel path of the media. Rotation of the arms may be stopped at various points along their travel arc to position the media at a desired or plane.Type: GrantFiled: January 28, 2005Date of Patent: April 10, 2007Assignee: Xerox CorporationInventors: Brent R. Jones, Keng Leong Ng, Joshua K. Hoyt, Yin Mei Sia, Aaron T. Nelson, Thomas R. Edney, Scott J. Korn, Boon Hang Ng
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Patent number: 6921222Abstract: A high-speed printer is provided. The printer includes a media assembly for supporting a media roll that supplies the sheet of media and also for controlling a flow rate of the sheet of media through the printer. The sheet of media is received by the feedback control system, which is used to detect a slack position of the sheet of media. The slack position is used by the media assembly to determine a flow rate of the sheet of media through the printer. In addition, the printer also includes a roller system for receiving the sheet of material from the feedback control system and to feed the sheet of media to a print carriage.Type: GrantFiled: September 6, 2002Date of Patent: July 26, 2005Assignee: Venture Manufacturing (Singapore) Ltd.Inventors: Keng Leong Ng, Kok Hong Kan, Yong Soon Lim, Siao Hau The, Chi Siang Sean Yew, Chee Weng Wong, Chee Seng Ong
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Publication number: 20040156665Abstract: A high-speed printer is provided. The printer includes a media assembly for supporting a media roll that supplies the sheet of media and also for controlling a flow rate of the sheet of media through the printer. The sheet of media is received by the feedback control system, which is used to detect a slack position of the sheet of media. The slack position is used by the media assembly to determine a flow rate of the sheet of media through the printer. In addition, the printer also includes a roller system for receiving the sheet of material from the feedback control system and to feed the sheet of media to a print carriage.Type: ApplicationFiled: September 6, 2002Publication date: August 12, 2004Applicant: VENTURE MANUFACTURING (SINGAPORE) LTD.Inventors: Keng Leong Ng, Kok Hong Kan, Yong Soon Lim, Siao Hau Teh, Chi Siang Sean Yew, Ghee Weng Wong, Chee Seng ong
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Patent number: 6540320Abstract: A system and a method for servicing a printhead using a low-height service station design. The system of the present invention includes a low-height service station having a gear and clutch arrangement that permits a service station drive assembly and a print media feed assembly to use the same motor. By momentarily reversing the motor, the gear and clutch arrangement permits the service station drive assembly to be engaged and the print media feed assembly to be disengaged, or vice versa. Moreover, the gear and clutch arrangement provides a means for a capping platform and a wiping platform within the service station to move independently of each other.Type: GrantFiled: January 5, 2000Date of Patent: April 1, 2003Assignee: Hewlett-Packard CompanyInventor: Keng Leong Ng