公开(公告)号：CA1081360A

公开(公告)日：1980-07-08

申请号：CA287104

申请日：1977-09-20

Applicant: IBM

Inventor： ARTER NELSON K ,  HAMMOND CLARENCE H ,  PEDERSEN DANIEL J ,  PRAHL MARVIN E

IPC: G05B19/28

Abstract: A PROCEDURE FOR TIGHTENING TAPE WRAPS ON A SPINDLE During a search operation in a rotating magnetic head tape transport, the tape is transported from a supply spool via guides and a vacuum column past the rotating head read/write station to a take-up spool. As the tape is wound onto the take-up spool in layer-by-layer convolutions, air is entrapped between the layers. The entrapped air forms a layer of air film and as a result the tape is loosely wound on the take-up spool. A "Hard Step" voltage is generated and is applied to the capstan motor at the end of the search operation to tighten any loose wraps caused by the air entrapment during the search.

公开(公告)号：FR2364845A1

公开(公告)日：1978-04-14

申请号：FR7725206

申请日：1977-08-09

Applicant: IBM

Inventor： ARTER NELSON K ,  HAMMOND CLARENCE H ,  PEDERSEN DANIEL J ,  PRAHL MARVIN E

IPC: B65H23/18 ,  G11B15/32 ,  G11B15/48 ,  B65H75/26 ,  B65H79/00 ,  G11B15/43

Abstract: During a search operation in a rotating magnetic head tape transport, the tape is transported from a supply spool via guides and a vacuum column past the rotating head read/write station to a take-up spool. As the tape is wound onto the take-up spool in layer-by-layer convolutions, air is entrapped between the layers. The entrapped air forms a layer of air film and as a result the tape is loosely wound on the take-up spool. A "Hard Step" voltage is generated and is applied to the capstan motor at the end of the search operation to tighten any loose wraps caused by the air entrapment during the search.