Magnetic tape head assembly with laterally moveable central section

• US 7,006,329 B2
• Filed: 06/02/2003
• Issued: 02/28/2006
• Est. Priority Date: 06/02/2003
• Status: Expired due to Fees

• Current Assignee: Imation Corporation (Glassbridge Enterprises, Inc.)
• Original Assignee: Imation Corporation (Glassbridge Enterprises, Inc.)
• Inventors: Johnson, Douglas W., Zwettler, Christopher J., Fahimi, Saeed A.
• Primary Examiner(s): KLIMOWICZ, WILLIAM JOSEPH
• Application Number:
  US10/452,465
• Publication Number:
  US 20040240113A1
• Time in Patent Office: 1,002 Days
• Field of Search: 360/221, 360/231, 360/251.1, 360/261.1
• US Class Current: 360/221
• CPC Class Codes: G11B 5/1871 Shaping or contouring of the transducing or guiding surface
• CPC Class Codes: G11B 5/255 comprising means for protection against wear in thin film structures G11B5/3106
• CPC Class Codes: G11B 5/265 Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track G11B5/33 takes precedence in thin film structures G11B5/31
• CPC Class Codes: G11B 5/3106 where the integrated or assembled structure comprises means for conditioning against physical detrimental influence, e.g. wear, contamination G11B5/3133 takes precedence
• CPC Class Codes: G11B 5/584 for track following on tapes
• CPC Class Codes: G11B 5/60 Fluid-dynamic spacing of heads from record-carriers

Abstract

A magnetic head assembly in a linear tape system. The magnetic head assembly includes a magnetic head having a central section, a first outrigger, and a second outrigger. The central section maintains at least one read/write element. The first outrigger is positioned adjacent the central section and forms at least one air bleed slot. The second outrigger is positioned adjacent the central section opposite the first outrigger and also forms at least one air bleed slot. Finally, the central section is laterally moveable relative to the outriggers. With this configuration, the moveable, central section, otherwise used for lateral positioning of the read/write element relative to a magnetic tape, is separated from the outriggers that otherwise minimize a fly height between the magnetic tape and the outriggers.

Claims

1. A magnetic head assembly in a linear tape system, comprising:

a magnetic head including;

a central section maintaining at least one read/write element;

a first outrigger adjacent the central section and forming at least one air bleed slot; and

a second outrigger adjacent the central section opposite the first outrigger, the second outrigger forming at least one air bleed slot;

wherein the central section is laterally moveable relative to the outriggers.

2. The magnetic head assembly of claim 1, wherein the magnetic head further includes:

a base rigidly attached to the first and second outriggers;

wherein the central section is not rigidly attached to the base.

3. The magnetic head assembly of claim 1, wherein the central section is characterized by the absence of an air bleed slot.

4. The magnetic head assembly of claim 1, further comprising:

an actuator for laterally moving the central section relative to the outriggers.

5. The magnetic head assembly of claim 1, wherein the first outrigger further includes a subambient pressure feature configured to limit lateral tape movement relative to the first outrigger as the magnetic tape moves longitudinally across the first outrigger.

6. The magnetic head assembly of claim 5, wherein the subambient pressure feature includes a substantially square edge.

7. The magnetic head assembly of claim 5, wherein the second outrigger further includes a subambient pressure feature configured to limit lateral tape movement of a magnetic tape relative to the second outrigger as the magnetic tape moves longitudinally across the second outrigger.

8. The magnetic head assembly of claim 1, wherein the first outrigger defines a longitudinal slot for laterally constraining a magnetic tape as the magnetic tape moves longitudinally across the first outrigger.

9. The magnetic head assembly of claim 8, wherein the first outrigger defines a width measured in a direction perpendicular to tape travel, and further wherein the longitudinal slot has a width not more than one-half a width of the first outrigger.

10. The magnetic head assembly of claim 9, wherein the longitudinal slot has a width of not more than one-half a width of the tape.

11. The magnetic head assembly of claim 8, wherein the first outrigger defines an exit side adjacent the central section and an entrance side opposite the exit side, and further wherein the longitudinal slot extends proximate the exit side.

12. The magnetic head assembly of claim 11, wherein at least one air bleed slot is formed between the longitudinal slot and the entrance side.

13. The magnetic head assembly of claim 8, wherein the second outrigger defines a longitudinal slot for laterally constraining a magnetic tape as the magnetic tape moves longitudinally across the second outrigger.

14. A method of operating a magnetic tape system for recording, reproducing, and/or erasing magnetic information relative to a magnetic tape of a linear tape system, the method comprising:

a) providing a magnetic head assembly including a magnetic head having a central section and opposing outriggers positioned at opposite longitudinal sides of the central section, the central section maintaining at least one read/write element;

b) moving the tape longitudinally across the magnetic head; and

c) laterally moving the central section relative to the outriggers during step b).

15. The method of claim 14, wherein step c) is characterized by the outriggers remaining spatially fixed.

16. The method of claim 14, wherein step c) is performed as part of a track following operation.

17. The method of claim 14, wherein each of the outriggers are adapted to induce a subambient pressure condition between the tape and the respective outrigger, and further wherein step c) is characterized by the absence of tape drag relative to lateral movement of the central section.

18. The method of claim 14, wherein at least the first outrigger forms a longitudinal slot having a width less than a width of the magnetic tape, the method further comprising:

forcing the tape into the longitudinal slot during step b) to laterally constrain the tape.

19. A magnetic tape system for recording, reproducing, and/or erasing magnetic information in a linear tape system, the magnetic tape system comprising:

a magnetic tape; and

a magnetic head assembly including a magnetic head comprising;

a central section maintaining at least one read/write element,

a first outrigger adjacent the central section and forming at least one air bleed slot,

a second outrigger adjacent the central section opposite the first outrigger, the second outrigger forming at least one air bleed slot;

wherein the central section is laterally moveable relative to the outriggers and the magnetic tape.

20. The magnetic tape system of claim 19, wherein the first outrigger defines a longitudinal slot for laterally constraining the magnetic tape as the magnetic tape moves longitudinally across the first outrigger.