(19)

(11)

EP 0 935 779 A1

(12)

(43) Date of publication: 18.08.1999 Bulletin 1999/33 (21) Application number: 97922907.0 (22) Date of filing: 08.04.1997

(51) International Patent Classification (IPC):  G04B 19/ 22( . ) (86) International application number: PCT/EP1997/001740 (87) International publication number: WO 1998/024004 (04.06.1998 Gazette 1998/22)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV RO SI (30) Priority: 26.11.1996 DE 19962020548U (71) Applicant: Schweitzer, Robert Peter 64372 Ober-Ramsteadt (DE)	(72) Inventor: Schweitzer, Robert Peter 64372 Ober-Ramsteadt (DE)