(19)

(11)

EP 0 640 034 A1

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(43) Date of publication: 01.03.1995 Bulletin 1995/09 (21) Application number: 93912254.0 (22) Date of filing: 15.04.1993

(51) International Patent Classification (IPC):  G02F 1/ 35( . ) B29C 67/ 00( . ) G02F 1/ 361( . ) B29K 105/ 32( . ) B29C 35/ 08( . ) G02F 1/ 355( . ) B29K 101/ 10( . ) (86) International application number: PCT/US1993/003544 (87) International publication number: WO 1993/020993 (28.10.1993 Gazette 1993/26)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 15.04.1992 US 19920869480 (71) Applicant: SOANE TECHNOLOGIES INC. Hayward, CA 94545 (US)	(72) Inventors: BAE, Young, C. 6360 Stoneridge Mall Road Pleasonton, CA 94588 (US) SOANE, David, S. Piedmont, CA 94610 (US) CROCKER, Charles San Francisco, CA 94150 (US) (74) Representative: Bassett, Richard Simon  ERIC POTTER & CLARKSON St. Mary's Court St. Mary's Gate Nottingham NG1 1LE Nottingham NG1 1LE (GB)