MULTIHEAD RECORDING AND RETRIEVAL APPARATUS AND PROCEDURE FOR USE WITH SELF-TIMING OPTICAL LATHE OR PRE-FORMATTED DISCS - Patent 0878005

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EP 0 878 005 A1

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(43)	Date of publication:
	18.11.1998 Bulletin 1998/47

(21)	Application number: 97900921.0

(22)	Date of filing: 03.02.1997

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International Patent Classification (IPC):

G11B 7/ 14^{( . )}
G11B 20/ 14^{( . )}
G11B 27/ 10^{( . )}
G11B 27/ 19^{( . )}
G11B 27/ 36^{( . )}

G11B 19/ 24^{( . )}
G11B 27/ 034^{( . )}
G11B 27/ 11^{( . )}
G11B 27/ 30^{( . )}

(86)	International application number:
	PCT/CA1997/000069

(87)	International publication number:
	WO 1997/028530 (07.08.1997 Gazette 1997/34)

(84)	Designated Contracting States:
	AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE

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Priority:

03.02.1996 GB 19960002213

(71)	Applicant: PARALIGHT LASER TECHNOLOGIES INC.
	Toronto Ontario M5R 3H8 (CA)

(72)	Inventors:
	DEWAR, Steven, W. Toronto, Ontario M5R 3H8 (CA) REGAZZO, Ricardo Toronto, Ontario M6J 3C4 (CA) WILTSHIRE, John, H., D. Toronto, Ontario M6R 1E6 (CA) SMITH, Gregory, L. Toronto, Ontario M6S 4K6 (CA)

(74)	Representative: Davies, Gregory Mark
	Urquhart-Dykes & Lord Alexandra House 1 Alexandra Road Wales Swansea, Wales SA1 5ED Swansea, Wales SA1 5ED (GB)

(54)	MULTIHEAD RECORDING AND RETRIEVAL APPARATUS AND PROCEDURE FOR USE WITH SELF-TIMING OPTICAL LATHE OR PRE-FORMATTED DISCS