Patents by Inventor Heinrich Wittkamp

Heinrich Wittkamp 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: 4201356
    Abstract: The cartridge arrangement of the present invention enables recording and/or playback apparatus to be used with cartridges of various sizes, the cartridges being provided with releasable locking means and, after the release of such means, being able to be opened to permit the tape roll(s) to be rotated on the recording and/or playback apparatus.The cartridge arrangement is applicable to every type of recording medium in tape or strip form in systems employing cartridges in which there is a need for using cartridges of various sizes, especially in the case of the recording and playback of magnetic signals.
    Type: Grant
    Filed: March 21, 1978
    Date of Patent: May 6, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Schoettle, Karl Uhl, Heinrich Wittkamp, Peter Dobler, Helmut Lewin
  • Patent number: 4128852
    Abstract: The invention is directed to a tape transport mechanism for recording and playing back video signals comprising a contact winding mechanism with tape-guiding means at the capstan and a magnetic tape in which the substrate is a polyethylene terephthalate film. The coated side of the tape, during transport, is in contact with the guide surface of the guide means, and no part of the transport mechanism at which slip could occur during the tape transport is allowed to be in contact with the tape substrate. The tape is wound with its substrate on the inside and its coated side is preferably abrasive with respect to the guide surface, which latter may advantageously consist either of steel or a ceramic material. The bonding agent of the magnetic dispersion -- preferably a chromium dioxide dispersion -- may be prepared from a polyurethane/polyvinyl chloride mixture which imparts the desired hardness to the tape.
    Type: Grant
    Filed: March 7, 1977
    Date of Patent: December 5, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Werner Senkpiel, Klaus Schoettle, Heinrich Wittkamp, Karl Uhl
  • Patent number: 4118616
    Abstract: A cassette, particularly a cassette for a wide recording tape, consisting essentially of a lid-closable housing of plastics material, snap latch means being provided which interact between the long side of the lid and the wall of the housing opposite the lid hinge, which means consist, according to the invention, of cams on the lid and grooves in the wall of the housing, which cams and grooves engage each other to produce, when the cassette is opened, an initial closing force by deformation of the adjacent wall of the housing, in order to make opening of the cassette more difficult.
    Type: Grant
    Filed: May 12, 1977
    Date of Patent: October 3, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinrich Wittkamp, Manfred Gehrung
  • Patent number: 4098446
    Abstract: The invention relates to a process for the manufacture of a tape guide of large surface area for tape transport apparatus and to the tape guide manufactured thereby. In manufacturing the guide, a strip of material is elastically deformed, after which the deformation is maintained. One of the sides of the strip of material serves as guide surface for the magnetic tape. The strip can be located on the periphery of one or more bodies, if appropriate in a groove provided therein, and can be attached to the said bodies by suitable means, for example with the aid of integral hooks provided at the ends of the strip.The guide may be used for all types of tape transport apparatus. Since the guide of the invention offers extremely accurate tape guidance, it can be used particularly advantageously for magnetic tapes having a plurality of tracks and transported at a high speed, such as is usual, e.g., in video recording or in the recording of digital data.
    Type: Grant
    Filed: August 5, 1976
    Date of Patent: July 4, 1978
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Schoettle, Heinrich Wittkamp, Lothar Gliniorz
  • Patent number: 4056245
    Abstract: A magnetic tape cartridge consisting essentially of two hollow boxes which are connected together, by means of a closing spring, with their single open sides facing each other so as to be pivotable in one plane, a closing force being exerted upon said hollow boxes by said spring. This magnetic tape cartridge is suitable for all applications where cartridge halves must be frequently pivoted relative to one another, while being economical to manufacture.
    Type: Grant
    Filed: December 4, 1975
    Date of Patent: November 1, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Schoettle, Heinrich Wittkamp, Lothar Gliniorz
  • Patent number: 4029268
    Abstract: The invention relates to a magnetic tape cassette and a tape recorder for use with such a cassette. More specifically, the invention relates to the provision of movable holding means within the cassette, which means -- in a first position -- prevent unwinding of the packs of tape and thus hold the magnetic tape taut and -- in a second position -- release the packs and the magnetic tape for operation in conjunction with guide, scanning and driving means on the recorder. The said holding means are in the form of spring elements which engage teeth in the hubs to prevent the packs from unwinding. In a special embodiment, the holding means are in the form of flat members, one on each side of the packs between the side surfaces thereof and the upper and lower walls of the cassette, individual springs being provided which resiliently support said members relative to the wall of the cassette and permit movement of said members from a first, pack-locking position to a second, pack-releasing position.
    Type: Grant
    Filed: September 30, 1975
    Date of Patent: June 14, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Schoettle, Heinrich Wittkamp, Lothar Gliniorz, Peter Dobler
  • Patent number: 4029249
    Abstract: A high-speed roller system for transporting webs of sheeting, preferably for coating the same with a magnetic layer, comprising a suction roller for control of the speed of the web, which suction roller has a surface containing grooves, preferably rhombic grooves, in which the perforations for sucking the sheeting are disposed, preferably at the points of intersection, the ratio of the total cross-sectional area of the perforations to the total surface area of the roller being from 0.7 to 3%.
    Type: Grant
    Filed: September 12, 1975
    Date of Patent: June 14, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Peter Nagel, Werner Grau, Hermann Maier, Heinrich Wittkamp, Roland Falk, Paul Willmann
  • Patent number: 4014042
    Abstract: A magnetic tape cassette comprises a housing open on one side and, movable therein, a sheath enclosing a magnetic tape roll. Detachable retaining means in the cassette hold the sheath and the roll in position while the cassette is not on the recorder. The retaining means are detachable by unlatching means when the cassette is fitted to the recorder, so that, following a movement of the sheath, the cassette is opened to allow the roll to emerge at least partially from the cassette and the circumference of the roll to be rotated by means of a recorder-associated capstan provided outside the cassette. Further advantageous embodiments of the invention concern the cassette and the recorder. The cassette of the invention and the recorder associated therewith can be employed in all fields of magnetic tape recording and reproduction. Its application to a magnetic tape system with a self-threading tape end entails advantages.
    Type: Grant
    Filed: December 10, 1975
    Date of Patent: March 22, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Schoettle, Heinrich Wittkamp, Karl Uhl, Gerhard Rotter
  • Patent number: 3987489
    Abstract: The invention relates to a cartridge for a recording medium in tape or strip form and a transport apparatus for use with such a cartridge, both being favorably matched to one another according to the invention. The cartridge consists essentially of a housing which is composed of parts pivotally connected to one another and, in the closed position, completely encloses a roll of tape wound on a hub. In the open position of the cartridge, at least part of the roll of tape is so exposed that the roll can be rotated and the tape or strip scanned on the apparatus. The transport apparatus is provided with appropriately designed means for receiving the cartridge which, when some of its components are pivoted, swings apart the parts of the cartridge, which is placed upon the apparatus in the closed position, and thus opens the cartridge.
    Type: Grant
    Filed: December 16, 1974
    Date of Patent: October 19, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Schoettle, Heinrich Wittkamp, Karl Uhl, Gerhard Rotter, Robert Gertz
  • Patent number: RE29976
    Abstract: The invention relates to a cartridge for a recording medium in tape or strip form and a transport apparatus for use with such a cartridge, both being favorably matched to one another according to the invention. The cartridge consists essentially of a housing which is composed of parts pivotally connected to one another and, in the closed position, completely encloses a roll of tape wound on a hub. In the open position of the cartridge, at least part of the roll of tape is so exposed that the roll can be rotated and the tape or strip scanned on the apparatus. The transport apparatus is provided with appropriately designed means for receiving the cartridge which, when some of its components are pivoted, swings apart the parts of the cartridge, which is placed upon the apparatus in the closed position, and thus opens the cartridge.
    Type: Grant
    Filed: December 30, 1977
    Date of Patent: April 24, 1979
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Schoettle, Heinrich Wittkamp, Karl Uhl, Gerhard Rotter, Robert Gertz
  • Patent number: D271870
    Type: Grant
    Filed: February 6, 1979
    Date of Patent: December 20, 1983
    Inventors: Klaus Schoettle, Volker Richter, Heinrich Wittkamp