Patents by Inventor Gerhard Mandl

Gerhard Mandl 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: 6065190
    Abstract: A carding machine has a cylinder (3), stationary, self-cleaning flats (2) fixed at a chain (45) and guided and adjusted by a flexible bend (48). Additional active trash, dust and short fibre extraction units (1) are placed in the main carding zone. The units (1) are constructed as separate units, removable and placeable, instead of stationary flats (2), between adjacent flats (2). The units (1) have the same principal width gauge as the flats (2) or a multiple of it. The units (1) are fixed and held the same way as the flats (2) by the chain (45) and the flexible bend (48). The machine achieves an excellent carding quality and is readily adjustable to different needs.
    Type: Grant
    Filed: May 17, 1999
    Date of Patent: May 23, 2000
    Assignee: Gerhard Mandl
    Inventors: Gerhard Mandl, Hans-Peter Meile
  • Patent number: 5613280
    Abstract: A sliver processing machine includes a plurality of roll pairs between which a running sliver passes. Each roll pair is composed of a driving roll and a pressure roll. A separate pressing device is connected with each pressure roll for urging each pressure roll against its driving roll. Each pressing device has a shiftable element displaced by the pressure roll upon radial displacement of the pressure roll in response to winding of sliver on either the pressure roll or the associated driving roll. A common actuating element is connected to each shiftable element of each pressing device for displacing the common actuating element upon displacement of any one of the shiftable elements. A switching device is connected to the common actuating element. The switching device has an idle state and a signal-generating state.
    Type: Grant
    Filed: August 14, 1995
    Date of Patent: March 25, 1997
    Assignee: Trutzschler GmbH & Co. KG
    Inventor: Gerhard Mandl
  • Patent number: 5600871
    Abstract: A combing machine having a pair of detachment rolls (6") and a nipper head (3) which, during a nip, carries out a forward stroke towards the pair of detachment rolls (6") and a return stroke. In the path of the stroke of the nipper head (3) active apparatus (26, 27, 28) is present in order to force a fiber tuft (10) into a given relative position with respect to the nipper head (3) at least at the end of the forward stroke movement.
    Type: Grant
    Filed: September 8, 1995
    Date of Patent: February 11, 1997
    Inventors: Gerhard Mandl, Hans-Peter Meile
  • Patent number: 5546636
    Abstract: A comber machine with a nipper head (3) has a fixed bearing (2), and at least one pair of detaching rolls (6") which are rotatably mounted in bearings (41). The nipper head (3) and the detaching rolls (6") are moved during a combing cycle towards one another and away from one another by the distance of a stroke path, up to a minimum distance which corresponds to a predetermined separation value. While still maintaining the stroke path, the predetermined separation distance (ecartement value) can be adjusted. To facilitate the setting of the ecartement value, provision is made for bearings (41) of the detaching rolls (6") to be displaced relative to the fixed bearing (2) of the nipper head (3), jointly on a track (45) which enlarges or reduces the separation value.
    Type: Grant
    Filed: March 27, 1995
    Date of Patent: August 20, 1996
    Inventors: Gerhard Mandl, Hans-Peter Meile
  • Patent number: 5517725
    Abstract: A comber has a nipper head (3), detaching rolls (6), and half-lap (4), wherein, during a combing cycle, the nipper head (3) and the detaching rolls (6) are moved by a drive system (31 to 40) out of a rear end position relative to one another into a front end position and back again. The detaching rolls (6) are driven in a pull-off direction (25) of a combed tuft (11). The half-lap (4) is also driven. The nipper head (3) comes within an area of action of a needle segment (5) of the half-lap (4) during a section of the combing cycle. To increase performance, provision is made for the drive system (31 to 40) to rotate the half-lap (4) during a combing cycle by an integral number of rotations, at least twice. The length of the needle segment (5) is extended in the direction of rotation in accordance with a higher rotational speed.
    Type: Grant
    Filed: March 27, 1995
    Date of Patent: May 21, 1996
    Inventors: Gerhard Mandl, Hans-Peter Meile
  • Patent number: 4519821
    Abstract: A filter drum is screened off at the matted fibers take-off position on its interior face via a sealing membrane which is pressed by support sheets and a tightening element against the interior face. The drum is positioned within a housing whose interior is subjected to a suction force and is sealed off from the atmosphere by lip seals. A gap between a compression roll and a take-off roll is tightly filled by the compressed layer of matted fibers so that the entry of leakage air is prevented.
    Type: Grant
    Filed: October 18, 1982
    Date of Patent: May 28, 1985
    Assignee: Rieter Machine Works, Ltd.
    Inventors: Kurt Weber, Giancarlo Mondini, Gerhard Mandl
  • Patent number: 4469214
    Abstract: In a can changer device, empty cans are fed to a reserve position A and full cans are transported from a collection position C into a delivery position G by means of an apparatus for moving spinning cans. The can moving apparatus comprises drive means containing rails and a carriage movable thereon and having pivotably mounted arms. The arms are pivotable from a substantially vertical position, and specifically, to one side into a substantially horizontal position for entraining and moving the empty cans and, as to one arm of such arms, into the opposite substantially horizontal position for entraining and moving the full can. The carriage is movable to-and-fro by means of a toothed belt between a deflection or reversing head and a drive head, respectively between the locations or positions H and L. During operation, the can changer device itself moves the filled can from the position B towards the position C and the empty can from the position A into the position B.
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: September 4, 1984
    Assignee: Rieter Machine Works Limited
    Inventors: Andreas Maurer, Gerhard Mandl, Hanspeter Meile
  • Patent number: 4413378
    Abstract: The present invention concerns a method for processing a fiber sliver in a drafting arrangement, and a drafting arrangement for implementing the method. The objective for a drafting arrangement, which can be adapted to a wide range of staple lengths, to draft a fiber sliver at high speeds, has led to the following features of the invention:(a) The fiber sliver is deflected simultaneously in the drafting process systematically in such a manner that, the fiber sliver can be inserted into the subsequently arranged funnel and the subsequently arranged pair of calender rolls without further deflection.(b) All bottom rolls are fixedly arranged.(c) The first pressure rolls limiting the pre-drafting zone and the main drafting zone, respectively, are arranged to be shiftable along an arc about the rotational axis of the corresponding bottom roll in such a manner that the drafting zones are adaptable to the fiber length.
    Type: Grant
    Filed: March 29, 1982
    Date of Patent: November 8, 1983
    Assignee: Rieter Machine Works Limited
    Inventors: Gerhard Mandl, Giancarlo Mondini, Viktor Pietrini, Kurt Weber, Rudolf Wildbolz
  • Patent number: 4353667
    Abstract: A method of, and apparatus for, maintaining substantially constant a quantity of opened fibrous material delivered per unit of time, to a spinning preparatory machine, wherein a conveying air stream is generated by means of a fan operating at a given point on its characteristic diagram, the conveying air stream is delivered into a transporting duct for the fibrous material, and the fibrous material is supplied into the transporting duct. The supplied fibrous material within the duct is accelerated by means of the conveying air stream, and the accelerated fibrous material is delivered within the duct in the direction of the spinning preparatory machine.
    Type: Grant
    Filed: August 26, 1977
    Date of Patent: October 12, 1982
    Assignee: Rieter Machine Works Ltd.
    Inventors: Gerhard Mandl, Robert Moser, Rudolf Wildbolz
  • Patent number: 4261165
    Abstract: The shaft on which the rotor is secured is mounted via anti-friction bearings in a sleeve which, in turn, is spaced from the housing by spacer means of low heat conductivity. In addition, at least one heat-conducting means of high heat conductivity connects the sleeve to the housing in heat conductive relation. The heat generated during rotation of the rotor shaft is dissipated through the heat conducting means to allow increased rotational speeds, for example, up to 55,000 rpm.
    Type: Grant
    Filed: February 23, 1979
    Date of Patent: April 14, 1981
    Assignee: Rieter Machine Works, Ltd.
    Inventors: Ulrich Burgermeister, Gerhard Mandl, Viktor Pietrini
  • Patent number: 3970260
    Abstract: Apparatus for building a rotationally symmetrically evened bobbin package with a bobbin chuck for supporting the bobbin and with a friction drive drum for driving the bobbin. The bobbin chuck is rotatable at speeds above the critical rotational speed and there is provided on the bobbin chuck a balancing element with a mass which is freely movable along a circular path concentric with the bobbin chuck axis, which mass in the centered position of the bobbin chuck is distributable evenly and automatically along the path.
    Type: Grant
    Filed: September 16, 1974
    Date of Patent: July 20, 1976
    Assignee: Rieter Machine Works, Ltd.
    Inventors: Klaus Bruggisser, Felix Graf, Gerhard Mandl, Albert Ruegg