Patents by Inventor Johan B.C. Engelen

Johan B.C. Engelen 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).

  • Publication number: 20170337942
    Abstract: A unidirectional and bi-directional tape head with sub-ambient pressure cavities. The tape head is adapted for reading and/or writing to a magnetic tape. The tape head includes: a tape-bearing surface; a transducer area, having at least one transducer designed for reading and/or writing to the magnetic tape; a cavity open on the tape-bearing surface adjacent to the transducer area that extends parallel to the transducer area and transversally to the longitudinal direction of circulation of the tape such that an opening of the cavity faces the tape in operation; and one or more air bleed slots connected to the cavity. The cavity is further dimensioned and arranged with respect to the transducer area to create, upon circulation of the tape in operation, sub-ambient pressure therein.
    Type: Application
    Filed: August 8, 2017
    Publication date: November 23, 2017
    Inventors: Johan B.C. Engelen, Mark A. Lantz, Hugo E. Rothuizen
  • Publication number: 20170163239
    Abstract: A mechanical resonator includes a spring-mass system, wherein the spring-mass system comprises a phase-change material. The mechanical resonator typically comprises an electrical circuit portion, coupled to the phase-change material to alter a phase configuration within the phase-change material. Methods of operation are also disclosed.
    Type: Application
    Filed: February 24, 2017
    Publication date: June 8, 2017
    Inventors: Johan B.C. Engelen, Mark A. Lantz, Wabe W. Koelmans
  • Publication number: 20170076747
    Abstract: A magnetic tape medium includes at least one servo band along a longitudinal extension of the tape medium which at least one servo band comprises servo patterns organized in servo frames for supporting to determine positional information. At least one of the servo frames includes a first burst comprising at least two servo stripes inclined at a first angle with respect to a direction orthogonal to the longitudinal extension of the tape medium, followed by a second burst including at least two servo stripes inclined at a second angle with respect to a direction orthogonal to the longitudinal extension of the tape medium, which second angle is different from the first angle. At least one of the stripes of the first burst has a first magnetic polarity and at least one of the stripes of the second burst has a second magnetic polarity different from the first magnetic polarity.
    Type: Application
    Filed: September 13, 2016
    Publication date: March 16, 2017
    Inventors: Giovanni Cherubini, Johan B.C. Engelen, Simeon Furrer, Mark A. Lantz
  • Publication number: 20160308507
    Abstract: A mechanical resonator includes a spring-mass system, wherein the spring-mass system comprises a phase-change material. The mechanical resonator typically comprises an electrical circuit portion, coupled to the phase-change material to alter a phase configuration within the phase-change material. Methods of operation are also disclosed.
    Type: Application
    Filed: April 14, 2015
    Publication date: October 20, 2016
    Inventors: Johan B.C. Engelen, Mark A. Lantz, Wabe W. Koelmans
  • Publication number: 20160308470
    Abstract: A mechanical resonator includes a spring-mass system, wherein the spring-mass system comprises a phase-change material. The mechanical resonator typically comprises an electrical circuit portion, coupled to the phase-change material to alter a phase configuration within the phase-change material. Methods of operation are also disclosed.
    Type: Application
    Filed: December 30, 2015
    Publication date: October 20, 2016
    Inventors: Johan B.C. Engelen, Mark A. Lantz, Wabe W. Koelmans
  • Publication number: 20160111120
    Abstract: A unidirectional and bi-directional tape head with sub-ambient pressure cavities. The tape head is adapted for reading and/or writing to a magnetic tape. The tape head includes: a tape-bearing surface; a transducer area, having at least one transducer designed for reading and/or writing to the magnetic tape; a cavity open on the tape-bearing surface adjacent to the transducer area that extends parallel to the transducer area and transversally to the longitudinal direction of circulation of the tape such that an opening of the cavity faces the tape in operation; and one or more air bleed slots connected to the cavity. The cavity is further dimensioned and arranged with respect to the transducer area to create, upon circulation of the tape in operation, sub-ambient pressure therein.
    Type: Application
    Filed: December 30, 2015
    Publication date: April 21, 2016
    Inventors: Johan B.C. Engelen, Mark A. Lantz, Hugo E. Rothuizen
  • Publication number: 20160055867
    Abstract: A unidirectional and bi-directional tape head with sub-ambient pressure cavities. The tape head is adapted for reading and/or writing to a magnetic tape. The tape head includes: a tape-bearing surface; a transducer area, having at least one transducer designed for reading and/or writing to the magnetic tape; and a cavity open on the tape-bearing surface adjacent to the transducer area that extends parallel to the transducer area and transversally to the longitudinal direction of circulation of the tape such that an opening of the cavity faces the tape in operation. The cavity is further dimensioned and arranged with respect to the transducer area to create, upon circulation of the tape in operation, sub-ambient pressure therein. The present invention allows for a very close tape-head spacing.
    Type: Application
    Filed: August 19, 2015
    Publication date: February 25, 2016
    Inventors: Johan B.C. Engelen, Mark A. Lantz, Hugo E. Rothuizen
  • Publication number: 20150356993
    Abstract: A magnetic tape medium includes at least one servo band along a longitudinal extension of the tape medium which at least one servo band comprises servo patterns organized in servo frames for supporting to determine positional information. At least one of the servo frames includes a first burst comprising at least two servo stripes inclined at a first angle with respect to a direction orthogonal to the longitudinal extension of the tape medium, followed by a second burst including at least two servo stripes inclined at a second angle with respect to a direction orthogonal to the longitudinal extension of the tape medium, which second angle is different from the first angle. At least one of the stripes of the first burst has a first magnetic polarity and at least one of the stripes of the second burst has a second magnetic polarity different from the first magnetic polarity.
    Type: Application
    Filed: July 6, 2015
    Publication date: December 10, 2015
    Inventors: Giovanni Cherubini, Johan B.C. Engelen, Simeon Furrer, Mark A. Lantz
  • Publication number: 20150356984
    Abstract: A magnetic tape medium includes at least one servo band along a longitudinal extension of the tape medium which at least one servo band comprises servo patterns organized in servo frames for supporting to determine positional information. At least one of the servo frames includes a first burst comprising at least two servo stripes inclined at a first angle with respect to a direction orthogonal to the longitudinal extension of the tape medium, followed by a second burst including at least two servo stripes inclined at a second angle with respect to a direction orthogonal to the longitudinal extension of the tape medium, which second angle is different from the first angle. At least one of the stripes of the first burst has a first magnetic polarity and at least one of the stripes of the second burst has a second magnetic polarity different from the first magnetic polarity.
    Type: Application
    Filed: July 6, 2015
    Publication date: December 10, 2015
    Inventors: Giovanni Cherubini, Johan B.C. Engelen, Simeon Furrer, Mark A. Lantz
  • Publication number: 20150318006
    Abstract: A tape storage medium comprises at least one servo band along a longitudinal extension of the tape storage medium for comprising positional information. The servo band comprises a first servo subband and a second servo subband extending along the longitudinal extension of the tape storage medium. The first servo subband comprises a frame servo pattern containing a first set of servo frames, wherein each servo frame of the set comprises a first burst and a second burst. Each burst comprises at least two servo stripes inclined at an angle with respect to a direction orthogonal to the longitudinal extension of the tape medium. The second servo subband contains a set of servo tracks extending along the longitudinal extension of the tape storage medium and arranged next to each other, wherein each servo track of the set contains a servo pattern of magnetic transitions.
    Type: Application
    Filed: November 27, 2013
    Publication date: November 5, 2015
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Giovanni Cherubini, Johan B.C. Engelen, Simeon Furrer, Jens Jelitto, Mark A. Lantz
  • Publication number: 20150243314
    Abstract: Tape head with thermal tape-head distance sensor to reduce the distance between the tape and the head to allow an increase in areal density. A tape head designed for reading and/or writing to a tape, including: a tape bearing surface shaped to form an air bearing when moving the tape with respect to the tape bearing surface; a thermal tape-head distance sensor circuit adapted to sense heat dissipated at the level of the tape bearing surface by the tape and thereby sense a distance between the tape bearing surface and the tape; and tape-head distance control means connected to the thermal tape-head distance sensor circuit to receive a signal provided by the tape-head distance sensor circuit and configured to alter the distance according to a signal received from the tape-head distance sensor circuit. This invention is further directed to a method of tape-head distance control for the above tape head.
    Type: Application
    Filed: April 29, 2015
    Publication date: August 27, 2015
    Inventors: Laurent A. Dellmann, Johan B.C. Engelen, Simeon Furrer, Mark Alfred Lantz, Hugo E Rothuizen
  • Publication number: 20150194173
    Abstract: A tape head, adapted for reading and/or writing to a magnetic tape, has a tape-bearing surface and is configured to urge a magnetic tape against the bearing surface, in operation. The bearing surface includes a transducer area, having at least one transducer that is a read and/or write element, designed for reading and/or writing to a magnetic tape, and a structured area adjacent to the transducer area, comprising a periodic array of topographic features, the topographic features configured within the structured area to determine a minimal distance between the transducer area and a tape.
    Type: Application
    Filed: March 24, 2015
    Publication date: July 9, 2015
    Inventors: Laurent A. Dellmann, Johan B.C. Engelen, Vara Sudananda Prasad Jonnalagadda, Mark A. Lantz
  • Patent number: 9058828
    Abstract: A tape storage medium comprises at least one servo band (SB) along a longitudinal extension (x) of the tape storage medium (TP) for supporting to determine positional information. The servo band (SB) comprises a set of servo tracks (STx) extending along the longitudinal extension (x) of the tape storage medium (TP) and arranged next to each other. Each servo track (STx) of the set contains a servo pattern with magnetic transitions at a defined frequency (fx), wherein the frequencies (fx) of magnetic transitions of servo patterns of adjacent servo tracks (STx) are different from each other. The set of servo tracks (STx) contains at least three servo tracks (STx) with magnetic transitions of different frequencies (fx).
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: June 16, 2015
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Giovanni Cherubini, Johan B.C. Engelen, Simeon Furrer, Jens Jelitto, Mark A. Lantz
  • Publication number: 20150062740
    Abstract: A tape storage medium includes a tape head for reading/writing data from/to a tape storage medium. At least one servo band along a longitudinal extension of the tape storage medium determines positional information. The servo band includes a set of servo tracks having a width extending along the longitudinal extension and arranged next to each other. A total of two different servo patterns are contained in the set of servo tracks. The tape head includes two servo readers. A width of each servo reader orthogonal to the longitudinal extension of the tape storage medium is at least half the width of a servo track. The two servo readers are offset from each other orthogonal to the longitudinal extension by d*wST+n*wST with wST being the width of the servo track, with 0<d<1, and with n being an integer.
    Type: Application
    Filed: August 4, 2014
    Publication date: March 5, 2015
    Inventors: Giovanni Cherubini, Johan B.C. Engelen, Simeon Furrer, Jens Jelitto, Mark A. Lantz
  • Publication number: 20140368953
    Abstract: A tape head, adapted for reading and/or writing to a magnetic tape, has a tape-bearing surface and is configured to urge a magnetic tape against the bearing surface, in operation. The bearing surface includes a transducer area, having at least one transducer that is a read and/or write element, designed for reading and/or writing to a magnetic tape, and a structured area adjacent to the transducer area, comprising a periodic array of topographic features, the topographic features configured within the structured area to determine a minimal distance between the transducer area and a tape.
    Type: Application
    Filed: June 4, 2014
    Publication date: December 18, 2014
    Applicant: International Business Machines Corporation
    Inventors: Laurent A. Dellmann, Johan B.C. Engelen, Vara Sudananda Prasad Jonnalagadda, Mark A. Lantz
  • Publication number: 20140029131
    Abstract: A transport system for transporting magnetic tape includes at least one roller for guiding the magnetic tape having at least one electrode and a controller being configured to apply a voltage to the at least one electrode so as to produce a force of attraction between the magnetic tape and the at least one electrode.
    Type: Application
    Filed: July 2, 2013
    Publication date: January 30, 2014
    Inventors: Johan B.C. Engelen, Simeon Furrer, Mark A. Lantz
  • Publication number: 20140029134
    Abstract: A transport system for transporting magnetic tape includes at least one roller for guiding the magnetic tape having at least one electrode, wherein the at least one electrode is configured to be charged triboelectrically so as to produce a force of attraction between the magnetic tape and the at least one electrode.
    Type: Application
    Filed: July 2, 2013
    Publication date: January 30, 2014
    Inventors: Johan B.C. Engelen, Simeon Furrer, Mark A. Lantz
  • Publication number: 20140002923
    Abstract: A magnetic tape medium includes at least one servo band along a longitudinal extension of the tape medium which at least one servo band comprises servo patterns organized in servo frames for supporting to determine positional information. At least one of the servo frames includes a first burst comprising at least two servo stripes inclined at a first angle with respect to a direction orthogonal to the longitudinal extension of the tape medium, followed by a second burst including at least two servo stripes inclined at a second angle with respect to a direction orthogonal to the longitudinal extension of the tape medium, which second angle is different from the first angle. At least one of the stripes of the first burst has a first magnetic polarity and at least one of the stripes of the second burst has a second magnetic polarity different from the first magnetic polarity.
    Type: Application
    Filed: June 12, 2013
    Publication date: January 2, 2014
    Inventors: Giovanni Cherubini, Johan B.C. Engelen, Simeon Furrer, Mark A. Lantz
  • Publication number: 20140002928
    Abstract: A tape head system includes a read and/or write head having at least one read and/or write element configured to read from and/or write to magnetic tape and at least one electrostatic element arranged adjacent to the read and/or write element; and a controller configured to apply a potential to the at least one electrostatic element.
    Type: Application
    Filed: June 14, 2013
    Publication date: January 2, 2014
    Inventors: Laurent A. Dellmann, Johan B.C. Engelen, Simeon Furrer, Mark A. Lantz, Hugo E. Rothuizen
  • Publication number: 20130321953
    Abstract: A write head comprising a yoke having at least a first and a second gap and a coil for producing a magnetic field at each gap, the coil comprising a plurality of windings, wherein the windings are arranged so as to produce the same magnetic field strength at each gap and/or along each gap by use of a proximity effect between the windings and a respective gap.
    Type: Application
    Filed: May 13, 2013
    Publication date: December 5, 2013
    Applicant: International Business Machines Corporation
    Inventors: Laurent A. Dellmann, Johan B.C. Engelen, Simeon Furrer, Mark A. Lantz, Hugo E. Rothuizen