Patents by Inventor Marc Alan Herwald
Marc Alan Herwald 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: 9531889Abstract: A media stiffness sensor assembly for an imaging device. The assembly comprises a translation mechanism coupled to a contact member, a drive mechanism coupled to the translation mechanism and a position sensor for providing a signal indicative of the position of the contact member. The assembly is mounted within an imaging device so that the contact member is moved into bending contact with a cantilevered portion of a media sheet in the media path. The energy used to translate the contact member from a home position into the cantilevered portion of a media sheet in the media path to deflect the cantilevered portion is used to determine a weight of the media sheet.Type: GrantFiled: December 31, 2013Date of Patent: December 27, 2016Assignee: Lexmark International, Inc.Inventors: Stefan Mark Atay, Timothy L Brown, Daniel Lee Carter, Marc Alan Herwald, Niko Jay Murrell, Jeremy Keith Payne
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Publication number: 20150296091Abstract: A media stiffness sensor assembly for an imaging device. The assembly comprises a translation mechanism coupled to a contact member, a drive mechanism coupled to the translation mechanism and a position sensor for providing a signal indicative of the position of the contact member. The assembly is mounted within an imaging device so that the contact member is moved into bending contact with a cantilevered portion of a media sheet in the media path. The energy used to translate the contact member from a home position into the cantilevered portion of a media sheet in the media path to deflect the cantilevered portion is used to determine a weight of the media sheet.Type: ApplicationFiled: December 31, 2013Publication date: October 15, 2015Inventors: Stefan M Atay, Timothy L. Brown, Daniel L. Carter, Marc Alan Herwald, Niko Jay Murrell, Jeremy Payne
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Patent number: 9128438Abstract: A method of determining a media weight using a media stiffness sensor in an imaging device. A media sheet is staged having a cantilevered portion which is deflected by a contact member translated into the cantilevered portion. Based on the energy used to move the contact member through a travel distance, a media weight can be determined. An operating parameter of the imaging device may be adjusted based on the media weight that was determined.Type: GrantFiled: December 31, 2013Date of Patent: September 8, 2015Assignee: Lexmark International, Inc.Inventors: Stefan M Atay, Timothy L Brown, Daniel L. Carter, Marc Alan Herwald, Niko Jay Murrell, Jeremy Payne, Kevin Dean Schoedinger
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Publication number: 20150185673Abstract: A method of determining a media weight using a media stiffness sensor in an imaging device. A media sheet is staged having a cantilevered portion which is deflected by a contact member translated into the cantilevered portion. Based on the energy used to move the contact member through a travel distance, a media weight can be determined. An operating parameter of the imaging device may be adjusted based on the media weight that was determined.Type: ApplicationFiled: December 31, 2013Publication date: July 2, 2015Applicant: Lexmark International, Inc.Inventors: Stefan M. Atay, Timothy L. Brown, Daniel L. Carter, Marc Alan Herwald, Niko Jay Murrell, Jeremy Payne, Kevin Dean Schoedinger
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Patent number: 7922280Abstract: An imaging apparatus includes a frame and a maintenance sled movably coupled to the frame. The maintenance sled includes a carrier engagement member. A printhead carrier is coupled to the frame. A carrier motor is drivably coupled to the printhead carrier. A controller is coupled to the carrier motor. The controller controls the carrier motor to drive the printhead carrier at a first velocity and at a second velocity. The second velocity is lower than the first velocity. The printhead carrier is controlled to move at the first velocity toward the maintenance sled, wherein prior to the printhead carrier contacting the carrier engagement member of the maintenance sled, the printhead carrier is decelerated from the first velocity to the second velocity.Type: GrantFiled: August 14, 2006Date of Patent: April 12, 2011Assignee: Lexmark International, Inc.Inventors: Frederick Charles Griesemer, Marc Alan Herwald, Martin Alan Johnson, Daniel Robert LaBar
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Patent number: 7605953Abstract: A method to compensate for imperfect scanner motion in a scanning apparatus having a moveable scanner includes generating an error array by measuring errors in a scanner position at each of a plurality of spaced positions along a direction of travel of the scanner; generating an error compensation array from the error array based on a low frequency component of the error array; and using the error compensation array to adjust at least one parameter associated with the scanning apparatus during a document scanning operation.Type: GrantFiled: June 9, 2004Date of Patent: October 20, 2009Assignee: Lexmark International, Inc.Inventors: Aaron Ray Crooker, Noah Jonathon Gawlik, Marc Alan Herwald, Michael Anthony Marra, III, Donald Norman Spitz
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Patent number: 7597419Abstract: An interface device for attaching a printhead carrier to a carrier drive belt includes a belt holder attached to the carrier drive belt, and an isolator coupled between the belt holder and the printhead carrier. The isolator is configured to provide directionally dependent filtering of vibrations propagating to the printhead carrier.Type: GrantFiled: November 30, 2007Date of Patent: October 6, 2009Assignee: Lexmark International, Inc.Inventors: Marc Alan Herwald, Michael Anthony Marra, III, Brian Andrew Naro
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Patent number: 7364261Abstract: An interface device for attaching a printhead carrier to a carrier drive belt includes a belt holder attached to the carrier drive belt, and an isolator coupled between the belt holder and the printhead carrier. The isolator is configured to provide directionally dependent filtering of vibrations propagating to the printhead carrier.Type: GrantFiled: March 10, 2004Date of Patent: April 29, 2008Assignee: Lexmark International, Inc.Inventors: Marc Alan Herwald, Michael Anthony Marra, III, Brian Andrew Naro
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Patent number: 7287826Abstract: A method of performing printhead maintenance firing in an ink jet printer that has a printhead carrier that carries an ink jet printhead, the ink jet printer having a waste ink receptacle, includes the steps of decelerating the printhead carrier from a first velocity after printing print data; and controlling a firing of the printhead during the decelerating in accordance with maintenance data so that ink droplets ejected from the printhead during the decelerating are received by the waste ink receptacle.Type: GrantFiled: December 12, 2003Date of Patent: October 30, 2007Assignee: Lexmark International, Inc.Inventors: Charles Stanley Aldrich, Marc Alan Herwald, Martin Alan Johnson
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Patent number: 7255421Abstract: An imaging apparatus includes a carrier housing having an attachment feature, a carrier belt to transmit a translation to the carrier housing in a bi-directional scanning direction; and an interface device interposed between and coupled to both the carrier housing and the carrier belt. The interface device includes a body having a wing and a base. The wing is defined by a span and by a chord length. At least one of the wing and the base is mounted via the attachment feature to the carrier housing. The span extends in the bi-directional scanning direction, and the chord length is substantially perpendicular to the span.Type: GrantFiled: September 27, 2004Date of Patent: August 14, 2007Assignee: Lexmark International, Inc.Inventors: Marc Alan Herwald, Brian Andrew Naro, Bryan Christopher Scharf
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Patent number: 7140715Abstract: An imaging apparatus includes a frame and a maintenance sled movably coupled to the frame. The maintenance sled includes a carrier engagement member. A printhead carrier is coupled to the frame. A carrier motor is drivably coupled to the printhead carrier. A controller is coupled to the carrier motor. The controller controls the carrier motor to drive the printhead carrier at a first velocity and at a second velocity. The second velocity is lower than the first velocity. The printhead carrier is controlled to move at the first velocity toward the maintenance sled, wherein prior to the printhead carrier contacting the carrier engagement member of the maintenance sled, the printhead carrier is decelerated from the first velocity to the second velocity.Type: GrantFiled: June 13, 2003Date of Patent: November 28, 2006Assignee: Lexmark International, Inc.Inventors: Frederick Charles Griesemer, Marc Alan Herwald, Martin Alan Johnson, Daniel Robert LaBar
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Patent number: 6914400Abstract: A scanning operation is synchronized with the motion of a scan mechanism. Encoder signals indicative of a position of the scan mechanism relative to a scan platen or an object being scanned are received. These encoder signals may include a single channel phase signals are channel A and channel B phase signals. Transitions of the encoder signals are detected. Scan pulses for triggering a scan operation by a scan element are generated based on transitions of the encoder signals. Differences in the encoder signal resolution and a desired scan resolution are compensated for in the generation of the scan pulses. A transfer signal is generated in synchronization with the scan pulses for controlling output of data from the scan element. Variations of the velocity of the scan mechanism cause variations of the frequency at which the scan pulses are generated.Type: GrantFiled: April 15, 2003Date of Patent: July 5, 2005Assignee: Lexmark International, Inc.Inventors: Marc Alan Herwald, Gretchen Yvonne Gibson, Michael Anthony Marra, III, Joseph Kamal Yackzan
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Patent number: 6893111Abstract: An imaging apparatus includes a carrier housing having an attachment feature, a carrier belt to transmit a translation to the carrier housing in a bi-directional scanning direction; and an interface device interposed between and coupled to both the carrier housing and the carrier belt. The interface device includes a body having a wing and a base. The wing is defined by a span and by a chord length. At least one of the wing and the base is mounted via the attachment feature to the carrier housing. The span extends in the bi-directional scanning direction, and the chord length is substantially perpendicular to the span.Type: GrantFiled: October 3, 2002Date of Patent: May 17, 2005Assignee: Lexmark International, Inc.Inventors: Marc Alan Herwald, Brian Andrew Naro, Bryan Christopher Scharf
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Publication number: 20040252154Abstract: An imaging apparatus includes a frame and a maintenance sled movably coupled to the frame. The maintenance sled includes a carrier engagement member. A printhead carrier is coupled to the frame. A carrier motor is drivably coupled to the printhead carrier. A controller is coupled to the carrier motor. The controller controls the carrier motor to drive the printhead carrier at a first velocity and at a second velocity. The second velocity is lower than the first velocity. The printhead carrier is controlled to move at the first velocity toward the maintenance sled, wherein prior to the printhead carrier contacting the carrier engagement member of the maintenance sled, the printhead carrier is decelerated from the first velocity to the second velocity.Type: ApplicationFiled: June 13, 2003Publication date: December 16, 2004Inventors: Frederick Charles Griesemer, Marc Alan Herwald, Martin Alan Johnson, Daniel Robert LaBar
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Publication number: 20040207353Abstract: A scanning operation is synchronized with the motion of a scan mechanism. Encoder signals indicative of a position of the scan mechanism relative to a scan platen or an object being scanned are received. These encoder signals may include a single channel phase signals are channel A and channel B phase signals. Transitions of the encoder signals are detected. Scan pulses for triggering a scan operation by a scan element are generated based on transitions of the encoder signals. Differences in the encoder signal resolution and a desired scan resolution are compensated for in the generation of the scan pulses. A transfer signal is generated in synchronization with the scan pulses for controlling output of data from the scan element. Variations of the velocity of the scan mechanism cause variations of the frequency at which the scan pulses are generated.Type: ApplicationFiled: April 15, 2003Publication date: October 21, 2004Inventors: Marc Alan Herwald, Gretchen Yvonne Gibson, Michael Anthony Marra, Joseph Kamal Yackzan
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Patent number: 6695426Abstract: A method is provided to reduce vertical banding defects in an ink jet printer. The method includes the steps of identifying a disturbance frequency of a disturbance source; identifying a natural frequency of a printhead carrier system; correlating the disturbance frequency of the disturbance source and the natural frequency of the printhead carrier system to a base carrier velocity; selecting a first carrier velocity for printing in a first direction, the first carrier velocity being different from the base carrier velocity; and selecting a second carrier velocity for printing in a second direction, the second carrier velocity being different from the base carrier velocity and different from the first carrier velocity.Type: GrantFiled: February 11, 2002Date of Patent: February 24, 2004Assignee: Lexmark International, Inc.Inventors: Marc Alan Herwald, Michael Anthony Marra, III, Randall David Mayo, Brian Andrew Naro, Barry Baxter Stout
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Publication number: 20030164867Abstract: A method is provided to reduce vertical banding defects in an ink jet printer. The method includes the steps of identifying a disturbance frequency of a disturbance source; identifying a natural frequency of a printhead carrier system; correlating the disturbance frequency of the disturbance source and the natural frequency of the printhead carrier system to a base carrier velocity; selecting a first carrier velocity for printing in a first direction, the first carrier velocity being different from the base carrier velocity; and selecting a second carrier velocity for printing in a second direction, the second carrier velocity being different from the base carrier velocity and different from the first carrier velocity.Type: ApplicationFiled: February 11, 2002Publication date: September 4, 2003Inventors: Marc Alan Herwald, Michael Anthony Marra, Randall David Mayo, Brian Andrew Naro, Barry Baxter Stout