公开(公告)号：CA2097227C

公开(公告)日：1996-10-29

申请号：CA2097227

申请日：1993-05-28

Applicant: IBM

Inventor： ALBRECHT THOMAS ROBERT ,  ARGUMEDO ARMANDO JESUS ,  EATON JAMES HOWARD ,  EAST DON GAYLORD ,  FELDE STEVEN LLOYD ,  JOHNSON DOUGLAS WAYNE

IPC: G11B23/037 ,  G11B23/08 ,  G11B23/087 ,  G11B33/14

Abstract: The invention is a tape reel brake which is mounted in a well in the top of a tape reel hub. The well is inside the tape bearing surface of the hub. The brake is mounted to be compliantly biased away from the base of the well. The hub is seated against a first inside surface of a tape cartridge housing. The hub and brake are seated in the tape cartridge such that teeth on the periphery of the brake are biased against the opposite inside surface of the cartridge housing about the periphery of an opening therein. The biasing of the brake against the opposite inside surface both prevents the rotation of the reel and shields out dust when the tape cartridge is removed from a tape drive. To rotate the reel, a tape drive clutch enters the opening in the opposite inside surface and depresses the brake into the well to mate with a smaller diameter portion of the hub or a recessed portion of the brake. The hub is always maintained on the inside surface of the housing, thereby eliminating lateral motion which could disrupt the tape path.

公开(公告)号：DE69415088T2

公开(公告)日：1999-07-15

申请号：DE69415088

申请日：1994-05-31

Applicant: IBM

Inventor： COMEAUX WAYNE THOMAS ,  GRAVES DAVID CONRAD ,  JOHNSON DOUGLAS WAYNE

IPC: G11B5/09 ,  G11B5/55 ,  G11B5/584 ,  G11B20/12

Abstract: A magnetic tape (21) has three evenly spaced-apart longitudinally-extending servo track areas (40-42). Four equal-sized longitudinally-extending data track areas (45-48) are disposed between said servo track areas (40-42) and between longitudinal edges of the tape (21) and one of said data track areas (45-48). All servo track areas (40-42) are simultaneously sensed for producing one head positioning signal (100). Data tracks are arranged into four groups of tracks (45-48), one-half of the data tracks in each group are concurrently accessed. The data tracks on the tape are arranged in clusters. Each cluster has one track from each of the groups of tracks. Two laterally-adjacent track clusters constitute four data track wraps for serpentine scanning of data tracks. The concurrent track accessing respectively occurs in first and second halves of a data track wrap. Each servo area indicates two lateral positions of the tape to the head (27). The lateral spacing between the lateral positions is equal to about a data track width. This arrangement makes the servo areas field writable.

公开(公告)号：DE69415088D1

公开(公告)日：1999-01-21

申请号：DE69415088

申请日：1994-05-31

Applicant: IBM

Inventor： COMEAUX WAYNE THOMAS ,  GRAVES DAVID CONRAD ,  JOHNSON DOUGLAS WAYNE

IPC: G11B5/09 ,  G11B5/55 ,  G11B5/584 ,  G11B20/12

Abstract: A magnetic tape (21) has three evenly spaced-apart longitudinally-extending servo track areas (40-42). Four equal-sized longitudinally-extending data track areas (45-48) are disposed between said servo track areas (40-42) and between longitudinal edges of the tape (21) and one of said data track areas (45-48). All servo track areas (40-42) are simultaneously sensed for producing one head positioning signal (100). Data tracks are arranged into four groups of tracks (45-48), one-half of the data tracks in each group are concurrently accessed. The data tracks on the tape are arranged in clusters. Each cluster has one track from each of the groups of tracks. Two laterally-adjacent track clusters constitute four data track wraps for serpentine scanning of data tracks. The concurrent track accessing respectively occurs in first and second halves of a data track wrap. Each servo area indicates two lateral positions of the tape to the head (27). The lateral spacing between the lateral positions is equal to about a data track width. This arrangement makes the servo areas field writable.

公开(公告)号：HK202296A

公开(公告)日：1996-11-15

申请号：HK202296

申请日：1996-11-07

Applicant: IBM

Inventor： COMEAUX WAYNE THOMAS ,  EAST DON GAYLORD ,  FELDE STEVE LLOYD ,  JOHNSON DOUGLAS WAYNE

IPC: G11B15/43 ,  G11B15/60 ,  G11B15/67 ,  G11B23/04 ,  G11B23/107

Abstract: The present invention is a tape drive system (1) comprising means to support and drive first and a second tape reels (4, 5), tape guides (7, 8), a transducing head (6) for reading or writing data, said system having a tape feed path from the first tape reel (4) to the second tape reel (5) around the tape guides (7, 8), the feed path including a wrap section wherein a portion of the tape is wrapped over an exposed part of the tape wound upon one of the tape reels (4), the wrapped portion of the tape forming a squeeze bearing realised in the presence of a thin film of air between the two surfaces of the tape constituting the bearing.Said squeeze bearing damps tape tension variation, inhibits the transmission of vibrations from one reel to the other, and eliminates the entrapment of entrained air without any additional rollers or other components. The tape path is suitable for use in a peripheral storage device, such as a magnetic tape drive, and is compatible with a variety of tape cartridge configurations.

公开(公告)号：DE69213303D1

公开(公告)日：1996-10-10

申请号：DE69213303

申请日：1992-04-15

Applicant: IBM

Inventor： COMEAUX WAYNE THOMAS ,  EAST DON GAYLORD ,  FELDE STEVE LLOYD ,  JOHNSON DOUGLAS WAYNE

IPC: G11B15/43 ,  G11B15/60 ,  G11B15/67 ,  G11B23/04 ,  G11B23/107

Abstract: The present invention is a tape drive system (1) comprising means to support and drive first and a second tape reels (4, 5), tape guides (7, 8), a transducing head (6) for reading or writing data, said system having a tape feed path from the first tape reel (4) to the second tape reel (5) around the tape guides (7, 8), the feed path including a wrap section wherein a portion of the tape is wrapped over an exposed part of the tape wound upon one of the tape reels (4), the wrapped portion of the tape forming a squeeze bearing realised in the presence of a thin film of air between the two surfaces of the tape constituting the bearing.Said squeeze bearing damps tape tension variation, inhibits the transmission of vibrations from one reel to the other, and eliminates the entrapment of entrained air without any additional rollers or other components. The tape path is suitable for use in a peripheral storage device, such as a magnetic tape drive, and is compatible with a variety of tape cartridge configurations.

公开(公告)号：DE69213303T2

公开(公告)日：1997-03-20

申请号：DE69213303

申请日：1992-04-15

Applicant: IBM

Inventor： COMEAUX WAYNE THOMAS ,  EAST DON GAYLORD ,  FELDE STEVE LLOYD ,  JOHNSON DOUGLAS WAYNE

IPC: G11B15/43 ,  G11B15/60 ,  G11B15/67 ,  G11B23/04 ,  G11B23/107

Abstract: The present invention is a tape drive system (1) comprising means to support and drive first and a second tape reels (4, 5), tape guides (7, 8), a transducing head (6) for reading or writing data, said system having a tape feed path from the first tape reel (4) to the second tape reel (5) around the tape guides (7, 8), the feed path including a wrap section wherein a portion of the tape is wrapped over an exposed part of the tape wound upon one of the tape reels (4), the wrapped portion of the tape forming a squeeze bearing realised in the presence of a thin film of air between the two surfaces of the tape constituting the bearing.Said squeeze bearing damps tape tension variation, inhibits the transmission of vibrations from one reel to the other, and eliminates the entrapment of entrained air without any additional rollers or other components. The tape path is suitable for use in a peripheral storage device, such as a magnetic tape drive, and is compatible with a variety of tape cartridge configurations.

公开(公告)号：ES2091405T3

公开(公告)日：1996-11-01

申请号：ES92303363

申请日：1992-04-15

Applicant: IBM

Inventor： COMEAUX WAYNE THOMAS ,  EAST DON GAYLORD ,  FELDE STEVE LLOYD ,  JOHNSON DOUGLAS WAYNE

IPC: G11B15/43 ,  G11B15/60 ,  G11B15/67 ,  G11B23/04 ,  G11B23/107

Abstract: The present invention is a tape drive system (1) comprising means to support and drive first and a second tape reels (4, 5), tape guides (7, 8), a transducing head (6) for reading or writing data, said system having a tape feed path from the first tape reel (4) to the second tape reel (5) around the tape guides (7, 8), the feed path including a wrap section wherein a portion of the tape is wrapped over an exposed part of the tape wound upon one of the tape reels (4), the wrapped portion of the tape forming a squeeze bearing realised in the presence of a thin film of air between the two surfaces of the tape constituting the bearing.Said squeeze bearing damps tape tension variation, inhibits the transmission of vibrations from one reel to the other, and eliminates the entrapment of entrained air without any additional rollers or other components. The tape path is suitable for use in a peripheral storage device, such as a magnetic tape drive, and is compatible with a variety of tape cartridge configurations.