(19)

(11)

EP 0 020 689 A1

(12)

(43) Date of publication: 07.01.1981 Bulletin 1981/01 (21) Application number: 80900047.0 (22) Date of filing: 20.11.1979

(51) International Patent Classification (IPC):  E04F 15/ 04( . ) (86) International application number: PCT/US1979/000998 (87) International publication number: WO 1980/001089 (29.05.1980 Gazette 1980/12)

(84) Designated Contracting States: CH DE FR GB LU NL SE (30) Priority: 22.11.1978 US 19780963094 (71) Applicant: MARINO, Vincent J. Beverly Farms, MA 01915 (US)	(72) Inventor: MARINO, Vincent J. Beverly Farms, MA 01915 (US)