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公开(公告)号：WO2004036539A3
公开(公告)日：2005-01-20
申请号：PCT/US0322879
申请日：2003-07-22
Applicant: IBM
Inventor： HENDRIKS FERDINAND , KARIDIS JOHN P
CPC classification number: G06F3/0425 , G06F3/03545
Abstract: A passive optical marker for use in accordance with an electronic whiteboard system that selectively allows a reflector associated with the optical marker to be exposed to a light emitting source. Thus, the optical marker of the present invention selectively provides information pertaining to the location of the optical marker and pen-up/pen-down states.
Abstract translation: 根据电子白板系统使用的无源光学标记器，其选择性地允许与光学标记器相关联的反射器暴露于发光源。 因此，本发明的光学标记选择性地提供与光学标记的位置有关的信息和笔直/下垂状态。
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公开(公告)号：SG44427A1
公开(公告)日：1997-12-19
申请号：SG1996000351
申请日：1994-06-22
Applicant: IBM
Inventor： HENDRIKS FERDINAND , RE MARK E
Abstract: An air bearing slider incorporating the invention has both front and rear pads extending from a generally planar body. Both pads have bearing faces separated by a gap that is substantially in excess of any fly height of the slider. The sides of both pads are oriented at a rake angle that is approximately equal to the maximum expected skew angle. The separation of the pads enables the slider to exhibit good pitch stability, and the pad rake angles provide resistance to roll effects that occur at large skew angles. Both pad faces exhibit extremely small taper angles that enable "inlet throttling" of air entrained by the slider. Such inlet throttling provides the slider with a fly height that is substantially independent of relative speed changes between the slider and a recording medium. A further embodiment includes a rear slider for contact recording applications.
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公开(公告)号：FR2316071A1
公开(公告)日：1977-01-28
申请号：FR7615577
申请日：1976-05-17
Applicant: IBM
Inventor： HENDRIKS FERDINAND
Abstract: In a jet printing system which includes an array of N nozzles, the droplet streams emitted from at least the first and Nth nozzle are continuously guttered, and the droplet streams emitted from the other nozzles are one of selectively guttered or directed to a printing medium. Alternatively, the array may be comprised of N rows and M columns of nozzles. The droplet streams emitted from at least the first and Nth row, through the first through Mth column are permanently guttered, and the droplet streams emitted from the other nozzles are one of selectively guttered or directed to a printing medium. In each instance, the air flow created by the permanently guttered droplet streams reduces the aerodynamic retardation of the other droplet streams, thereby reducing the misregistration of the droplets on the printing medium. In one embodiment, the guttered droplet streams comprise a non-marking liquid such as water, and the other droplet streams comprise a marking liquid such as ink.
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公开(公告)号：SG49581A1
公开(公告)日：1998-06-15
申请号：SG1995002255
申请日：1994-03-23
Applicant: IBM
Inventor： HARWOOD RICHARD FRED , HENDRIKS FERDINAND , KELLER CHRISTOPHER GUILD
Abstract: A disk drive having a passive slider exhibiting two fly heights, one for recording and reading operations and a second for idling, is disclosed. The disk drive has a magnetic recording surface set for rotation in a direction. A transducer carrier is radially positionable relative to the magnetic recording surface and can be moved between recording portions and idling portions of the annular surface. In the idling zone the surface includes a plurality of shallow depressions (84,86) disposed in an annular zone. The depressions are generally trench like. The orientation of the depressions depends on the type carrier for the transducer. If oriented transversely to the direction of rotation of the magnetic recording surface, they will boost pressure under the carrier increasing or introducing spacing between the body and the carrier. Where the carrier has an air bearing surface including regions creating zones of relatively negative pressure, the depressions are grooves paralleling the direction of rotation of the disk. The grooves diminish the effectiveness of the zones of negative pressure to increase carrier fly height.
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公开(公告)号：DE2755610A1
公开(公告)日：1978-06-22
申请号：DE2755610
申请日：1977-12-14
Applicant: IBM
Inventor： GIORDANO FRANCIS PETER , HENDRIKS FERDINAND
Abstract: There is described a droplet aspirator for an ink jet printer. The aspirator includes a housing having a tunnel therein, which is spaced from an ink jet nozzle which emits an ink jet stream which passes through the tunnel. A gas stream is also directed through the tunnel at substantially the same velocity as the ink jet stream for reducing the aerodynamic effects on adjacent ink droplets. The tunnels cross-sectional area is substantially constant from one plane to the next when measured in any given plane transverse to the longitudinal axis, for maintaining the velocity of the gas stream constant. The tunnel has a circular cross-section when used in a nozzle per spot system, and when used in an analog deflected system, has an entrance of one geometry, with the tunnel changing in geometry along its longitudinal axis to a different geometry at its exit. Preferably, in the analog deflected system, the entrance geometry is circular and the exit geometry is elliptical or rectangular.
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Patent Agency Ranking
公开(公告)号：IT8025314D0
公开(公告)日：1980-10-14
申请号：IT2531480
申请日：1980-10-14
Applicant: IBM
Inventor： HENDRIKS FERDINAND
Abstract: Apparatus for maintaining the velocity of a fluid constant, and in particular for maintaining an aspirator air velocity constant under varying atmospheric conditions. A precisely controlled air velocity is provided by a reference air source (134) whose frequency is derived from a crystal oscillator (136). The total air pressure from the aspirator tunnel (92) is compared with the total air pressure from the reference air source (134) using a matched thermistor pair (144, 146) to convert the pressure difference into an electrical error signal which is used to control the main air source (120) for the aspirator tunnel (92) such that the error signal is maintained at zero, thereby maintaining the air velocity in the aspirator tunnel (92) constant.
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公开(公告)号：DE2628415A1
公开(公告)日：1977-02-03
申请号：DE2628415
申请日：1976-06-24
Applicant: IBM
Inventor： HENDRIKS FERDINAND
Abstract: In a jet printing system which includes an array of N nozzles, the droplet streams emitted from at least the first and Nth nozzle are continuously guttered, and the droplet streams emitted from the other nozzles are one of selectively guttered or directed to a printing medium. Alternatively, the array may be comprised of N rows and M columns of nozzles. The droplet streams emitted from at least the first and Nth row, through the first through Mth column are permanently guttered, and the droplet streams emitted from the other nozzles are one of selectively guttered or directed to a printing medium. In each instance, the air flow created by the permanently guttered droplet streams reduces the aerodynamic retardation of the other droplet streams, thereby reducing the misregistration of the droplets on the printing medium. In one embodiment, the guttered droplet streams comprise a non-marking liquid such as water, and the other droplet streams comprise a marking liquid such as ink.
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公开(公告)号：IT1149227B
公开(公告)日：1986-12-03
申请号：IT2531480
申请日：1980-10-14
Applicant: IBM
Inventor： HENDRIKS FERDINAND
Abstract: Apparatus for maintaining the velocity of a fluid constant, and in particular for maintaining an aspirator air velocity constant under varying atmospheric conditions. A precisely controlled air velocity is provided by a reference air source (134) whose frequency is derived from a crystal oscillator (136). The total air pressure from the aspirator tunnel (92) is compared with the total air pressure from the reference air source (134) using a matched thermistor pair (144, 146) to convert the pressure difference into an electrical error signal which is used to control the main air source (120) for the aspirator tunnel (92) such that the error signal is maintained at zero, thereby maintaining the air velocity in the aspirator tunnel (92) constant.
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公开(公告)号：DE3065189D1
公开(公告)日：1983-11-10
申请号：DE3065189
申请日：1980-10-23
Applicant: IBM
Inventor： HENDRIKS FERDINAND
Abstract: Apparatus for maintaining the velocity of a fluid constant, and in particular for maintaining an aspirator air velocity constant under varying atmospheric conditions. A precisely controlled air velocity is provided by a reference air source (134) whose frequency is derived from a crystal oscillator (136). The total air pressure from the aspirator tunnel (92) is compared with the total air pressure from the reference air source (134) using a matched thermistor pair (144, 146) to convert the pressure difference into an electrical error signal which is used to control the main air source (120) for the aspirator tunnel (92) such that the error signal is maintained at zero, thereby maintaining the air velocity in the aspirator tunnel (92) constant.
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公开(公告)号：FR2374169A1
公开(公告)日：1978-07-13
申请号：FR7733131
申请日：1977-10-27
Applicant: IBM
Inventor： GIORDANO FRANCIS P , HENDRIKS FERDINAND
Abstract: The ink jet printer has a wind tunnel (10) positioned between the outlet nozzles and the paper which receives the ink droplets. An air stream flows through the tunnel which creates a chamber which is sealed to the outside and extends from the nozzles (38) up to its open end. - The ink droplet collection orifice (42) projects into the open end of the tunnel which has a circular inlet cross-section and a non-circular outlet. The outlet is elliptical or rectangular. The rotationally symmetrical charging electrode (8) is incorporated at the inlet end to the tunnel. Pressure equalisation walls (28, 30) which permit the passage of air are located forward of the electrode.
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