Apparatus for transporting a magnetic tape

Details Apparatus for transporting a magnetic tape Apparatus for transporting a magnetic tape

2007-08-21

2007-08-21

Wellington, Andrea (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

C360S073110, C360S077120

Reexamination Certificate

active

11218761

ABSTRACT:
An apparatus for transporting a magnetic tape includes a writing head, a unit for generating pulse signal, a reading head and a unit for calculating transport speed. The writing head has at least two parallel and linear magnetic gaps spaced a predetermined distance in a tape transport direction. The unit for generating pulse signal cyclically sends a pulse signal to the writing head to write a magnetic pattern corresponding to the magnetic gaps on the magnetic tape. The reading head detects the magnetic pattern to generate a resulting pulse signal. The unit for calculating transport speed calculates a transport speed of the magnetic tape based on the pulse signal sent by the reading head. The unit incorporates a first time interval which is obtained from two parallel and linear pattern components within a magnetic pattern, and a second time interval obtained from adjacent magnetic patterns.

REFERENCES:
patent: 6111719 (2000-08-01), Fasen
patent: 6542325 (2003-04-01), Molstad et al.
patent: 6580581 (2003-06-01), Bui et al.
patent: 6879457 (2005-04-01), Eaton et al.
patent: 7031087 (2006-04-01), Hashimoto
patent: 08-030942 (1996-02-01), None

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