(19)

(11)

EP 0 625 131 A1

(12)

(43) Date of publication: 23.11.1994 Bulletin 1994/47 (21) Application number: 93903249.0 (22) Date of filing: 05.02.1993

(51) International Patent Classification (IPC):  C04B 35/ 83( . ) F16D 69/ 02( . ) (86) International application number: PCT/GB1993/000242 (87) International publication number: WO 1993/016013 (19.08.1993 Gazette 1993/20)

(84) Designated Contracting States: DE ES FR (30) Priority: 06.02.1992 GB 19920002486 (71) Applicant: DUNLOP LIMITED London SW1P 2PL (GB)	(72) Inventors: FISHER, Ronald Warwickshire CV22 5LF (GB) WELLS, Trevor, Charles Warwickshire CV32 6DL (GB) FENNELL, Thomas, Gerard Warwickshire CV3 2PF (GB) (74) Representative: Sparrow, Alvar Alfred, et al  BTR Group Patent & Trade Mark Service P.O. Box 504 Erdington Birmingham B24 9QH Erdington Birmingham B24 9QH (GB)