Patents by Inventor Roland Hirth

Roland Hirth 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).

  • Patent number: 5649483
    Abstract: Individual sheets are singled out in a delivery of a sheet-fed rotary printing press. The delivery has a chain delivery with gripper bars extending transversely to the sheet-transport direction. The gripper bars are disposed on revolvingly driven transport chains and carry spaced apart sheet grippers disposed side by side. The sheet grippers grip the leading edges of the sheets and slave them to a main sheet pile. The gripper release is subject to an adjustable control for delayed sheet release, so that selected sheets may be transported beyond the main sheet pile. Revolvingly drivable suction tapes suction-grip the sheets which are released by the grippers with the delay, and they transport those sheets in the transport direction across and beyond the main sheet pile and onto a single sheet depository. The sheet depository is movably disposed in or on the printing-press frame. The suction tapes have upper suction surfaces at a raised position which extend between the sheet grippers.
    Type: Grant
    Filed: May 28, 1996
    Date of Patent: July 22, 1997
    Assignee: Heidelberger Druckmaschinen AG
    Inventors: Richard Mack, Udo Lautenklos, Rainer Klenk, Roland Hirth
  • Patent number: 5423656
    Abstract: Device for jogging a pile of sheets includes a pushrod extending in a direction towards a sheet pile, the pushrod having a thrust plate disposed on an end thereof pointing in the direction towards the sheet pile, a device for holding the pushrod, the holding device being displaceable in a jogging direction, a drive connectible to the holding device for imparting a jogging movement thereto in the jogging direction, the pushrod being mounted so as to be displaceable in the direction towards the sheet pile for adjusting the position of the thrust plate relative to the holding device, an adjusting device for adjusting the pushrod in position for effecting a format adjustment, the pushrod being variable in length, a device for varying the length of the pushrod, and a device for fixing the pushrod at and for releasing the pushrod from a respective length thereof.
    Type: Grant
    Filed: June 17, 1993
    Date of Patent: June 13, 1995
    Assignee: Heidelberger Druckmaschinen AG
    Inventors: Karl-Heinz Filsinger, Roland Hirth
  • Patent number: 5011125
    Abstract: A delivery sheet brake for a sheet-fed printing press having a suction element for gripping a sheet at a trailing edge thereof, the suction element being disposed on an adjustable slide for format adjustment and being guidably movable on a closed path loop extending through a transfer position and a release position for the sheet, and a step-up transmission connecting the suction element to a uniformly revolving drive element disposed likewise on the slide, said transmission including an articulated lever for accelerating the suction element to sheet travel speed before it reaches the transfer position and decelerating the suction element after sheet transfer until the suction element reaches the release position, including a chain wheel connected to the drive element disposed on the adjustable slide, a drive chain directly connecting the chain wheel with a chain wheel of a drive for the printing press, and a chain-storage device for the drive chain, the chain-storage device being in cooperative engagement wi
    Type: Grant
    Filed: October 25, 1989
    Date of Patent: April 30, 1991
    Assignee: Heidelberger Druckmaschinen AG
    Inventors: Nikolaus Spiegel, Karl-Heinz Filsinger, Roland Hirth
  • Patent number: 4991832
    Abstract: A delivery sheet brake for sheet-fed printing presses having a sucker formed with a suction opening movable on a closed loop path at varying speed corresponding in a sheet-transfer position to travel speed of a sheet and then being deceleratable until a sheet-release position is reached above a pile of sheets at a delivery, elements of a drive connected to the sucker for imparting a horizontal motion component to the sucker which is simultaneously movable vertically, and control valves for controlling vacuum in a suction line connected to the sucker, the sucker including a piston disposed in a cylinder of a housing so as to be movable in direction of a longitudinal axis of the piston, the housing being connected to the drive and being disposed swivelingly on a shaft having an axis extending transversely to a direction of travel of the sheet and parallel to the sheet, the piston being reciprocatingly movable in the cylinder of the housing by the vacuum in the suction line to the sucker and being controllable b
    Type: Grant
    Filed: October 25, 1989
    Date of Patent: February 12, 1991
    Assignee: Heidelberger Druckmaschinen AG
    Inventors: Nikolaus Spiegel, Karl-Heinz Filsinger, Roland Hirth