Title:
PROCESS FOR DETERMINING THE LENGTH OF TAPES,ESPECIALLY MAGNETIC TAPES
Document Type and Number:
WIPO Patent Application WO1988000386
Kind Code:
A3
Abstract:
Process for determining the remaining length of magnetic tape wound on to a spool. The sum of the times of a single rotation of the two spools is compared with a limit value tg for determination of the diameter Do. From this, one obtains the number n of turns on the spools from which the times TL and TR are calculated. The sum TL + TR = T is compared with the target time and from this the actual tape thickness is deduced, from which the true number of turns n and times T are calculated.
Inventors:
KAADEN JUERGEN (DE)
Application Number:
PCT/EP1987/000364
Publication Date:
February 11, 1988
Filing Date:
July 03, 1987
Export Citation:
Assignee:
THOMSON BRANDT GMBH (DE)
International Classes:
G11B27/17; G01B21/06; G11B27/34; (IPC1-7): G11B27/17
Foreign References:
| FR2472813A1 | 1981-07-03 | |||
| US4217615A | 1980-08-12 | |||
| DE3318324A1 | 1983-11-24 | |||
| BE886249R | 1981-03-16 | |||
| FR2425699A1 | 1979-12-07 | |||
| EP0216260A2 | 1987-04-01 |
Other References:
PATENT ABSTRACTS OF JAPAN, Band 7, Nr. 87 (P-190) (1232), 12. April 1983, & JP, A, 5814389 (Matsushita Denki Sangyo K.K.) 27. Januar 1983 siehe die Zusammenfassung
PATENT ABSTRACTS OF JAPAN, Band 5, Nr. 161 (P-84) (833), 16. Oktober 1981, & JP, A, 5690479 (Sanyo Denki K.K.) 22. Juli 1981 siehe die Zusammenfassung
PATENT ABSTRACTS OF JAPAN, Band 5, Nr. 161 (P-84) (833), 16. Oktober 1981, & JP, A, 5690479 (Sanyo Denki K.K.) 22. Juli 1981 siehe die Zusammenfassung
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