Patents by Inventor David C. Van Wyngaarden

David C. Van Wyngaarden 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).

  • Optical sensor for monitoring motion of a blank sheet
    Patent number: 7437120
    Abstract: An apparatus monitors the motion of sheet, such as in a digital printer. An optical sensor is capable of recording an image in a two-dimensional array of pixels, and has acuity to recognize a terrain of a small area on a sheet that is substantially blank to a human eye. The optical sensor views a portion of a sheet moving in a process direction through a path. A detection system compares at least two recorded terrain images from the sheet, thereby directly measuring velocity and direction of the sheet.
    Type: Grant
    Filed: January 31, 2005
    Date of Patent: October 14, 2008
    Assignee: Xerox Corporation
    Inventors: Raymond M. Ruthenberg, Mark Muzzin, John Wojtkowicz, Karen Lee, Michel Loiselle, David C. van Wyngaarden
  • Compact booklet maker
    Patent number: 7293766
    Abstract: An improved booklet maker incorporates a movable backstop for compiling incoming sheets and a stapler and creasing module, which is moved to various positions during the booklet making sequence. The moving stapler and creasing function enables the compiling function to occur simultaneously with the stapling and creasing functions. This results in a productivity gain without a footprint increase.
    Type: Grant
    Filed: July 13, 2005
    Date of Patent: November 13, 2007
    Assignee: Xerox Corporation
    Inventors: Raymond M. Ruthenberg, David C. Van Wyngaarden
  • Automated sheet folder or booklet maker which applies sticker closures
    Patent number: 7128118
    Abstract: In a finishing apparatus, such as would be used with a copier or high-speed printer, an applicator places stickers on a folded sheet or booklet, to prevent the sheet or booklet from unfolding or opening. At one point in the operation, the folded sheet or booklet is “backed up” in its basic process direction to receive a sticker on its trailing edge, and backed up further so that the sticker is folded over the trailing edge by a pair of crease rolls.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: October 31, 2006
    Assignee: Xerox Corporation
    Inventors: William E. Kramer, David C. van Wyngaarden
  • Booklet maker with crease rolls having a slip clutch
    Patent number: 6981938
    Abstract: In a booklet maker or sheet folder wherein one or more sheets are pushed through a nip formed by a pair of crease rolls, and wherein the crease rolls are driven by gears, a slip clutch is operatively disposed between one of the crease rolls and the gear driving the crease roll. The slip clutch compensates for the abrupt change in frictional coefficient experienced by the crease rolls when one or more sheets enter the nip.
    Type: Grant
    Filed: August 15, 2003
    Date of Patent: January 3, 2006
    Assignee: Xerox Corporation
    Inventors: Raymond M. Ruthenberg, Joseph M. McNamara, David C. Van Wyngaarden, Steven K. Siu
  • Booklet maker with flexible gate upstream of crease rolls
    Patent number: 6939283
    Abstract: In a booklet maker or sheet folder wherein one or more sheets are pushed through a nip formed by a pair of crease rolls, a pair of flexible gate members cover the nip while sheets to be folded are being loaded. When the sheets are pushed through the nip, the flexible gate members are displaced, allowing the nip to receive the sheets. Following feeding of the sheets, the flexible gate members spring back to a closed position.
    Type: Grant
    Filed: August 12, 2003
    Date of Patent: September 6, 2005
    Assignee: Xerox Corporation
    Inventors: Mark Sparano, David C. Van Wyngaarden