公开(公告)号：DE69119855D1

公开(公告)日：1996-07-04

申请号：DE69119855

申请日：1991-09-16

Applicant: IBM

Inventor： BACA FRANCISCO ANTONIO ,  FENNEMA ALAN AUGUST ,  HANCOCK REED ALAN ,  JAQUETTE GLEN ALAN ,  TIPTON LAWRENCE DAVID ,  WINARSKI DANIEL JAMES

IPC: G11B7/00 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/09 ,  G11B7/125 ,  G11B11/105 ,  G11B19/04 ,  G11B19/28 ,  G11B27/36 ,  G11B33/10

Abstract: The present invention relates to a data storage system (12, 13, 14, 15) of the type which comprises loading means (17,18) for loading a removable data storage disk into the system, driving means for rotating a disk loaded into the system up to an operational speed of rotation, and calibrating means (11) for calibrating the system in accordance with a disc loaded into the system. According to the invention the data storage system is characterised in that the calibrating means comprises sensing means for sensing the speed of rotation of a disk loaded into the system, means responsive to the speed sensing means for indicating when the speed of rotation is at a predetermined value less than the operational speed of rotation, and means for performing selected calibration operations on the system when the speed of rotation of said disk loaded into the system has reached the predetermined value.

公开(公告)号：DE3270176D1

公开(公告)日：1986-04-30

申请号：DE3270176

申请日：1982-12-10

Applicant: IBM

Inventor： RICHARD MAURICE EDMUND ,  WINARSKI DANIEL JAMES

IPC: G11B15/67 ,  G11B23/107 ,  G11B23/26 ,  G11B23/04 ,  G11B15/66

公开(公告)号：NO811903L

公开(公告)日：1981-12-28

申请号：NO811903

申请日：1981-06-04

Applicant: IBM

Inventor： RICHARD MAURICE E ,  WINARSKI DANIEL JAMES

IPC: G11B23/087 ,  B65H75/28 ,  G11B23/037 ,  G11B

Abstract: A hub for a tape reel used for web material such as magnetic recording tape is disclosed. The reel may be advantageously employed in a reel-to-reel magnetic tape transport where magnetic tape is wound under tension that is converted to radial forces which subject layers of the tape disposed over discontinuities associated with the reel hub to adversely affect the transducing relationship between the reading head and the recording surface of the tape. … The section of the cylindrical tape receiving surface (16) which is associated with a discontinuity is formed to function as a cantilever beam (25A, 25B) with the distal end (28, 29) of the beam being capable of radial inward bending when tape is wound on the hub. The outer portion (11) of the hub is made of relatively compressible material, while the inner portion (10) is relatively solid. Compressibility of the outer portion is enhanced by providing a plurality of circumferentially disposed cylindrically shaped openings (21) which also function to relieve radially induced forces on the tape layers.