• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:SU860684A3
    申请号:SU792720299
    申请日:1979-02-06
    公开日:1981-08-30
    发明作者:Бурсе Клод；Ленн Вильям
    申请人:Эссилор Энтернасьональ /Компани Женераль Д Оптик/ (Фирма)；
    IPC主号:
    专利说明:

    (5) BUILDING LUm OOPMOBAHi-L4 E, 1 AND PERSONAL
    one
    This invention relates to the molding of contact lenses from elastic material.
    A contact lens must meet three functional conditions. The first corresponds to a large-scale adjustment, which it must ensure, is the role of its central zone.
    The second corresponds to good adherence, which is the purpose of the application, at least one so-called separation zone, is usually provided for this purpose in its peripheral part around the central zone, and this separation zone should form a wedge-like volume with the eye, facilitating the introduction of a new tear film i at the appropriate eyelash sweep, which is a guarantee of good adaptation
    The third prerequisite that the contact lens must meet is the convenience of consumption. KOHTAKTF-iblX LIPS
    in particular, when passing a century on such a lens; the role of the peripheral edge of this lens is to provide comfort through its geometry. 5 Currently, the first and third functional conditions briefly indicated above can be satisfied. For BTopoio, a condition that addresses the completion of good adaptation,
    10 problem is not solved.
    If we are talking about contact lenses of solid material, the implementation of the separation zone in the peripheral part of the concave surface
    15 lenses do not pose any particular problems, since they use mechanical processing. This also applies to contact lenses made of elastic material when the material forming it
    20 is hydrophilic. These lenses
    权利要求:
    Claims (3)
    [1]
    can be processed in a dry state - scientific research institutes by usual methods of mechanical processing, eg e {lLMi for lenses of hard material; The material known by the name of NEML (gcnp 3 hydroxyethyl methacrylate) is one of the hydrophilic elastic materials that can be processed in a dry state. On the contrary, for contact lenses made of hydrophobic elastic material, such as silicone rubber, processing can be carried out using a means for temporary hardening, centrifuging or cooling them, which are difficult to apply on an industrial scale. For contact lynch and such material, two matrices are molded, one is concave, the other is convex. Closest to the proposed device for the formation of elastic contact lenses, containing a punch having a convex forming surface, a matrix having a concave supporting surface, and placed around their periphery, an annular elastic gasket G3 .. Used in the proposed device, the shank provides a connection between the forming elements in their peripheral part and interacts with the forming elements to form the molding cavity corresponding to the lens being sought. Such a gasket is therefore important, both for the concave surface of the lens and for its convex surface; in section, it has a finger profile of a glove interposed between two circumferences of almost equal diameter, the first belonging to one of the molding elements and the second belonging to the other of the shape of the common elements, and it merges with almost zero thickness tangentially with these molding elements along the indicated respective circles . This arrangement gives satisfactory results, but it has the following disadvantages. First of all, due to the sharp profile required for tangential connection with the forming elements, such an annular gasket is not always easy to perform, and its tangential connection with the forming elements is not always carried out with the required uniformity. In addition, such a gasket with a finger-shaped cross-section of the glove does not allow the area of the research institute to be located, which, due to the outlined considerations, should preferably have contact lenses in the sludge of the peripheral part on the concave surface. Since the separation zone cannot be achieved with this annular gasket, it could be obtained by making an additional cavity in the concave surface of the molding element, at present, especially when it comes to the optically useful zone, there is a great practical difficulty in processing and polishing a convex molding element, a mept having a circular edge in a cavity that corresponds to the intersection of the central zone of the lens being manufactured with its peripheral separation zone. The purpose of the invention is to obtain the peripheral zone of the required profile when forming a flexible lens. The goal is achieved by the fact that in a device for forming elastic contact lenses, comprising a punch with a convex forming surface, a matrix with a concave forming surface and an annular elastic pad placed along their periphery, forming the surface of a pupsop with a diameter smaller than the diameter of the forming surface of the matrix, and a sealing gasket is installed on the punch, forming the missing forming surface of it, and w one of the forming surfaces is made forming the closing polo be a rib, locking oschee} oschuyu form cavity rib formed on the concave surface of the die. Locking the molding cavity edge is made on the forming surface of the gasket. A sealing gasket is fixed on the punch. To improve the centering of the gasket, the latter is made with a skirt, with which it is connected to one of the molding elements. In addition, the punch is made of elastic material and in one piece with a sealing gasket. FIG. 1 shows a device, a longitudinal section; in FIGS. 2-8, variants of the device; Fig. 9 is a contact lens formed by the proposed device, a longitudinal section. A device for forming a contact lens (FIG. 1) contains a punch 1 having a convex forming surface, a matrix 2 having a concave forming surface, the diameter of the forming surface of the punch being smaller than the diameter of the forming surface of the matrix, a sealing gasket 3 which is mounted on the punch 1 and supplements its missing form. On the concave surface of the matrix 2, there is made a cavity-closing rib 4 made on the forming surface of the gasket 3 (FIG. 2). The sealing gasket can be made with a skirt 5 with which it is connected to one of the forming elements of the axon 1 ( Fig, l) or by the matrix 2 (Fig, 3, 4). The execution of the gasket with the skirt improves its centering, which improves the quality of the moldable lens. The punch can be made of an elastic material and in one piece with a sealing gasket (Fig. 4). The forming cavity 6 formed by the forming surfaces of the punch matrix and the sealing gasket provides the configuration of the contact lens 7 (Fig. 9). This lens should rest on the sclera of the eye. For a good renewal of the tear film under lens 7, it is important that the lens has a separation zone 8 entirely from the side of the concave surface in its peripheral part, capable of forming a wedge-shaped volume 9 with the sclera zone of the eye. The separation zone 8 extends between the circumference of the lens's external diameter D. circle B | (FIG. 9). limiting its central optically active zone. The quality of adaptation of the lens, i.e., the ability of the patient to use this lens painlessly, depends on this separation zone, at least in part. The molding surface of the gasket 3 defines the shape of the separation zone 8 and may have a different geometric shape, t, e, may be formed by the forming surface of the gasket belonging to a cone (Fig 5) or torus (Fig 6), or formed by a sequence of such simplest portions geometric surfaces. The use of the same gasket in combination with matrices of different diameters and having different curvatures provides for the formation of lenses of different diameters with different separation zones, the lens diameter being determined by the edge closing the cavity-forming cavity, which has a matrix (Figs. 7 and 1). can be made of synthetic material, such as polyamide or polycarbonate, and a punch and die made of a material that can be polished by machining a metal or glass, for example p Pyrex glass. The device works as follows. The forming cavity of the matrix is filled with the molding material, then the matrix and the punch are brought together to lock the forming cavity with an edge 4. After appropriate exposure, the device is opened and the finished lens is removed. Then the cycle repeats. Using the proposed device will improve the quality of contact lenses. Claim 1. Device for forming elastic contact lenses, comprising a punch, with a convex forming surface, a matrix with a concave forming surface and an annular elastic gasket placed around their periphery, characterized in that in order to provide the peripheral zone of the required profile when forming a flexible lens The shaping surface of the punch is fixed with a diameter smaller than the diameter of the shaping surface of the die, and the fitting gasket is installed in the punch, forming the missing heading w its surface, and on the discharge surfaces of formuyushih vyolneno locking ebro mold cavity.
    [2]
    2. The device according to claim 1, characterized in that the locking rib forming the cavity is made on the bent surface of the matrix.
    [3]
    3. HostG: ;; by li,. h a) C e e so. ;
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    类似技术:
    公开号 | 公开日 | 专利标题
    SU860684A3|1981-08-30|Device for moulding elastic contact lenses
    US3489491A|1970-01-13|Corneal contact lens with hydrophilic marginal rim portion
    US4555372A|1985-11-26|Rotational molding of contact lenses
    US4558931A|1985-12-17|Colored soft contact lens
    AU681015B2|1997-08-14|Method of cast molding toric contact lenses
    US5843346A|1998-12-01|Method of cast molding contact lenses
    US4704016A|1987-11-03|Bifocal contact lenses
    US4815690A|1989-03-28|Apparatus for the production of monolithic intraocular implants
    US20050237481A1|2005-10-27|Contact lenses having a rounded edge form
    US3495899A|1970-02-17|Scleral contact lenses
    GB2039248A|1980-08-06|Apparatus for moulding toric contact lenses
    JPH0618821A|1994-01-28|Torus-body soft contact lens
    US4659524A|1987-04-21|Method of molding bifocal contact lenses
    EP0552230A1|1993-07-28|Method for forming disposable molds for producing optical quality lenses
    US4227673A|1980-10-14|Gasket for casting lenses
    US2664025A|1953-12-29|Contact lenses and method of making same
    US3597055A|1971-08-03|Monocentric bifocal contact lens
    US4406189A|1983-09-27|Method of making lenses with a lenticular cut
    US3649236A|1972-03-14|Manufacture of multifocal ophthalmic lens molds
    JPH11348047A|1999-12-21|Mold for ocular lens
    US4018587A|1977-04-19|Method for producing a curved glass die having an aspherical polished concave face
    US4564484A|1986-01-14|Production of soft lenses having reduced spherical aberrations
    US4519681A|1985-05-28|Soft lenticular contact lens with negative refraction
    GB2187999A|1987-09-23|Contact lens mould
    GB967148A|1964-08-19|Improvements in or relating to moulds for the production of optical elements
    同族专利:
    公开号 | 公开日
    EP0003695B1|1981-09-16|
    FR2416104A1|1979-08-31|
    JPS54117559A|1979-09-12|
    FR2416104B1|1980-07-18|
    BR7900728A|1979-09-04|
    AU533126B2|1983-11-03|
    AU4397579A|1979-08-16|
    EP0003695A1|1979-08-22|
    US4211384A|1980-07-08|
    JPS6348685B2|1988-09-30|
    AR229938A1|1984-01-31|
    DE2960794D1|1981-12-03|
    CA1110812A|1981-10-20|
    CS209509B2|1981-12-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR957349A|1950-02-18|
    FR1071974A|1951-12-29|1954-09-07|Müller Werlt G M B H|Method and device for the manufacture of lenses|
    FR1170917A|1957-03-22|1959-01-20|Precision optical element molding process|
    US3211811A|1964-06-29|1965-10-12|Armorlite Leus Company Inc|Method and apparatus for casting thermosetting plastic lenses|
    US3475521A|1966-03-04|1969-10-28|John H Stroop|Method of making plastic contact lenses|
    NL7100565A|1970-01-19|1971-07-21|
    US3881683A|1973-11-29|1975-05-06|American Optical Corp|Gasket for lens mold|
    US3915609A|1974-03-18|1975-10-28|American Optical Corp|Molds for casting silicone rubber contact lenses|
    US4113224A|1975-04-08|1978-09-12|Bausch & Lomb Incorporated|Apparatus for forming optical lenses|
    US4121896A|1976-03-24|1978-10-24|Shepherd Thomas H|Apparatus for the production of contact lenses|
    JPS6030529B2|1977-04-28|1985-07-17|Nippon Kontakuto Renzu Seizo Kk|FR2509483B1|1981-04-15|1984-08-17|Essilor Int|
    US4640489A|1981-04-30|1987-02-03|Mia-Lens Production A/S|Mold for making contact lenses, either the male or female mold sections being relatively more flexible|
    NZ200362A|1981-04-30|1985-10-11|Mia Lens Prod|A method of forming a hydrophilic polymer suitable for use in the manufacture of soft contact lenses and a mould for use in the polymerization|
    US4565348A|1981-04-30|1986-01-21|Mia-Lens Production A/S|Mold for making contact lenses, the male mold member being more flexible than the female mold member|
    US4402659A|1981-12-30|1983-09-06|American Optical Corporation|Mold clamping fixture|
    DE3402648A1|1983-01-28|1984-08-02|Canon K.K., Tokio/Tokyo|MOLDING DEVICE FOR AN OPTICAL ELEMENT|
    GB8601967D0|1986-01-28|1986-03-05|Coopervision Optics|Manufacturing contact lenses|
    FR2617763B1|1987-07-07|1989-12-01|Essilor Int|METHOD OF MANUFACTURING CONTACT LENS IN A NATURAL PROTEIN POLYMER, BY MOLDING BEFORE CROSS-LINKING|
    US4865779A|1987-12-15|1989-09-12|Minnesota Mining And Manufacturing Company|Lens molding apparatus and method|
    US5573108A|1988-11-02|1996-11-12|British Technology Group Ltd.|Disposable contact lens package|
    AT124649T|1988-11-02|1995-07-15|British Tech Group|POURING CONTACT LENSES.|
    GB8900616D0|1989-01-12|1989-03-08|Galley Geoffrey H|Methods of manufacturing contact lenses|
    US5252056A|1990-03-16|1993-10-12|Ciba-Geigy Corporation|Contact lens casting mould|
    US5160749A|1990-10-30|1992-11-03|Minnesota Mining And Manufacturing Company|Three piece mold assembly for making an ocular device|
    US5271875A|1991-09-12|1993-12-21|Bausch & Lomb Incorporated|Method for molding lenses|
    US5238388A|1991-12-06|1993-08-24|Johnson & Johnson Vision Products, Inc.|Ophthalmic lens mold seal|
    US5254000A|1992-04-23|1993-10-19|Corning Incorporated|Organic polymer lens mold|
    TW258686B|1994-03-07|1995-10-01|Ciba Geigy|
    US5620720A|1994-11-29|1997-04-15|Allergan|Cast molding of intraocular lenses|
    AUPN089395A0|1995-02-03|1995-03-02|C. M. Laboratory Pte. Ltd.|Apparatus and method for moulding contact lenses|
    JPH10315252A|1997-05-20|1998-12-02|Menicon Co Ltd|Mold for molding lens blank and manufacture of contact lens|
    JP3890128B2|1997-10-28|2007-03-07|沖電気工業株式会社|Reflective prism|
    JP3798147B2|1998-06-03|2006-07-19|株式会社メニコン|Ophthalmic lens mold|
    US6276920B1|1998-08-11|2001-08-21|Menicon Co., Ltd.|Mold assembly for lens blank, having mold cavity and material reservoir defined by press-fitting engagement of upper and lower molds with intermediate sleeve|
    USD458023S1|1999-10-13|2002-06-04|Johnson & Johnson Vision Care, Inc.|Contact lens container|
    US6368522B1|2000-01-03|2002-04-09|Johnson & Johnson Vision Care, Inc.|Mold for forming a contact lens and method of preventing formation of small strands of contact lens material during contact lens manufacture|
    US7628485B2|2000-03-31|2009-12-08|Coopervision International Holding Company, Lp|Contact lens having a uniform horizontal thickness profile|
    US6467903B1|2000-03-31|2002-10-22|Ocular Sciences, Inc.|Contact lens having a uniform horizontal thickness profile|
    AUPR276601A0|2001-01-31|2001-02-22|Newman, Steve|A contact lens for refractive correction and capable of engagement with an eye either inside out or right way out|
    US7241125B2|2001-05-25|2007-07-10|Johnson & Johnson Vision Care, Inc.|Center touch method and apparatus for forming contact lenses|
    US6997693B2|2001-10-19|2006-02-14|Novartis Ag|Casting mold half and casting mold for producing contact lenses|
    US20040119174A1|2002-12-19|2004-06-24|Hofmann Gregory J.|Method for forming ophthalmic lenses using reusable molds|
    CN1834045B|2005-03-19|2010-04-28|鸿富锦精密工业（深圳）有限公司|Mould able to regulate concentricity|
    WO2014057512A1|2012-10-09|2014-04-17|株式会社メニコン|Contact lens|
    GB2521628A|2013-12-23|2015-07-01|Sauflon Cl Ltd|Contact lens mould|
    EP3593981A1|2018-07-12|2020-01-15|Essilor International |Improved molding device for casting an optical article with wafer on top, corresponding method and opticle article|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7803323A|FR2416104B1|1978-02-07|1978-02-07|
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