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특허 상세정보

Contact lens mold

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B29C-005/00    B29D-011/00   
미국특허분류(USC) 425/410 ; 425/412 ; 425/808 ; 249/117
출원번호 US-0161832 (1980-06-23)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 96  인용 특허 : 4
초록

A two piece contact lens mold having a pair of blunt, continuous mating surfaces extending around the periphery of the mold cavity is disclosed. Location of the mold parting line tangent to the lens edge substantially eliminates registration problems when a relief groove is provided at the edge of the female member. Parameters for mold materials and important dimensions are also disclosed. The mold can produce finished contact lenses which do not require further machining.

대표
청구항

A disposable contact lens mold for casting a finished, water swellable, soft contact lens, the lens having a chosen diameter, a posterior surface, a finished edge and an anterior surface which comprises, a hollow, frustroconical male member having a convex molding surface at the narrow end, said convex molding surface having a first chosen radius for shaping the posterior surface, a first longitudinal axis extending through said member, a solid, continuous, ring-shaped, rigid mold mating portion extending from the narrow end of said male member radially ...

이 특허를 인용한 특허 피인용횟수: 96

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