(19)

(11)

EP 0 580 671 A1

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(43) Date of publication: 02.02.1994 Bulletin 1994/05 (21) Application number: 92908292.0 (22) Date of filing: 21.04.1992

(51) International Patent Classification (IPC):  B68C 3/ 02( . ) (86) International application number: PCT/GB1992/000724 (87) International publication number: WO 1992/018421 (29.10.1992 Gazette 1992/27)

(84) Designated Contracting States: DE DK ES FR GB (30) Priority: 20.04.1991 GB 19910008478 19.12.1991 GB 19910026936 (71) Applicant: CALLENDER, Robert John Dalbeattie DG5 5TA (GB)	(72) Inventor: CALLENDER, Robert John Dalbeattie DG5 5TA (GB) (74) Representative: Kelvie, George Thomas, et al  Urquhart-Dykes & Lord The Victoria Suite 3rd Floor Northern Assurance Buildings Albert Square Manchester M2 4DN Manchester M2 4DN (GB)