Patents by Inventor Robert P. Zammit

Robert P. Zammit 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: 5519562
    Abstract: A compliant tape guide in a tape cartridge loads edge of a tape with an optimum pressure and a minimum of vibration by a series of compliant spring arms which transmit a guiding load to the edge through a flexible metal foil. The metal foil contacts the tape over a specified arc length in which the tape is supported by a curved guide bearing.
    Type: Grant
    Filed: March 15, 1995
    Date of Patent: May 21, 1996
    Assignee: International Business Machines Corporation
    Inventors: Armando J. Argumedo, Steven L. Felde, Douglas W. Johnson, Robert P. Zammit
  • Patent number: 5210667
    Abstract: A thin film magnetic head and a method for making the thin film head by the use of electrical lapping guides includes the use of a resistive lapping guide that has a height dimension and an electrical resistance that optimizes the results of the comparison of the resistive lapping guide to a finished lapping guide. The resistive lapping guide is not lapped during the lapping process. The finished lapping guide is lapped and the resistive comparison between the two determines the stopping of the lapping process. An as-lapped guide which is of the same dimensions as the finished lapping guide after lapping can also be included. An interleaved magnetic head having alternating magneto-resistive read elements and inductive write elements can be precisely lapped by sensing the resistance of the lapping guide elements and using a formula to determine the final resistance of the finished lapping guide to halt the lapping process.
    Type: Grant
    Filed: August 15, 1991
    Date of Patent: May 11, 1993
    Assignee: International Business Machines Corporation
    Inventor: Robert P. Zammit
  • Patent number: 5208714
    Abstract: An interleaved head for reading and writing data transitions onto a magnetic tape. A magnetic recording system for the bi-directional transportation of the tape media across the interleaved head. A controller controls the tape drive in a reel-to-reel format to accomplish the bi-directional motion of the tape media. The interleaved head includes two modules with each module having a plurality of alternating read and write transducers alternately spaced apart along a single line placed transverse to the movement of the magnetic tape. The two modules are placed together such that the write gaps of one module are aligned with the read gaps of the other module. Each read module includes the magneto-resistive element. Each write transducer includes a thin film conductor driving a nickel zinc ferrite substrate as one pole piece and a nickel zinc closure piece as the second pole piece.
    Type: Grant
    Filed: July 20, 1992
    Date of Patent: May 4, 1993
    Assignee: International Business Machines Corporation
    Inventors: Edward V. Denison, Vincent N. Kahwaty, Gustave C. Stern, Gerald Steving, Robert P. Zammit
  • Patent number: 5161299
    Abstract: An interleaved head for reading and writing data transitions onto a magnetic tape. A magnetic recording system for the bi-directional transportation of the tape media across the interleaved head. A controller controls the tape drive in a reel-to-reel format to accomplish the bi-directional motion of the tape media. The interleaved head includes two modules with each module having a plurality of alternating read and write transducers alternately spaced apart along a single line placed transverse to the movement of the magnetic tape. The two modules are placed together such that the write gaps of one module are aligned with the read gaps of the other module. Each read module includes the magneto-resistive element. Each write transducer includes a thin film conductor driving a nickel zinc ferrite substrate as one pole piece and a nickel zinc closure piece as the second pole piece.
    Type: Grant
    Filed: December 26, 1990
    Date of Patent: November 10, 1992
    Assignee: International Business Machines Corporation
    Inventors: Edward V. Denison, Vincent N. Kahwaty, Gustave C. Stern, Gerald Steving, Robert P. Zammit
  • Patent number: 5065483
    Abstract: A thin film magnetic head and a method for making the thin film head by the use of electrical lapping guides includes the use of a resistive lapping guide that has a height dimension and an electrical resistance that optimizes the results of the comparison of the resistive lapping guide to a finished lapping guide. The resistive lapping guide is not lapped during the lapping process. The finished lapping guide is lapped and the resistive comparison between the two determines the stopping of the lapping process. An as-lapped guide which is of the same dimensions as the finished lapping guide after lapping can also be included. An interleaved magnetic head having alternating magneto-resistive read elements and inductive write elements can be precisely lapped by sensing the resistance of the lapping guide elements and using a formula to determine the final resistance of the finished lapping guide to halt the lapping process.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: November 19, 1991
    Assignee: International Business Machines Corporation
    Inventor: Robert P. Zammit