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RE40152 |
Injection molded thermoplastic spectacle lens suited for fully automated dip hardcoating
Plastic injection-compression multi-cavity molding of flash-free improved-cleanliness thermoplastic spectacle lenses ( 16 ) are suitable to be robotically dip hardcoated. Special spring-loaded (...
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6896417 |
Hollow cast article with slit, method and apparatus for production thereof
In the production of a hollow cast article having a slit, the release of a hollow cast product from a mold is carried out while opening the hollow cast product. In one embodiment, a core provided...
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6869549 |
Method and mold for making ophthalmic devices
This invention provides a method and a mold for improving the release of a molded ophthalmic device from a mold. The method comprises the steps of: providing a first mold half and second mold half...
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6821108 |
Plastic castings molds
The invention is concerned with the problem that with known plastic casting moulds, especially those of polypropylene, the lenses produced with these moulds have a slippery surface. The invention...
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6638451 |
Plastic casting molds
The invention is concerned with the problem that with known plastic casting molds, especially those of polypropylene, the lenses produced with these molds have a slippery surface. The invention...
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6517995 |
Fabrication of finely featured devices by liquid embossing
Elastomeric stamps facilitate direct patterning of electrical, biological, chemical, and mechanical materials. A thin film of material is deposited on a substrate. The deposited material, either...
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6365329 |
Process for making multiple data storage disk stampers from one master
A method of making a stamper for use in a data storage disk molding process. The method includes making a first stamper including the steps of providing a stamper body having an information layer...
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6201036 |
Light-curable polymer material, method for making an elastic intraocular lens, and an elastic intraocular lens
A light-curable polymer material for making an intraocular lens is a mixture of components consisting of oligourethanemethacrylate, octylmethacrylate, oligocarbonatemetharcrylate,...
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6187888 |
Cast molding material for plastic lens and process for the production of plastic lens
A cast-molding material for a plastic lens which is almost free from causing defective dyeing when dyed, and a process for producing plastic lenses almost free from causing defective dyeing, the...
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6171529 |
Method of releasing a transparent polymer material from a mold and its use in the fabrication of a transparent polymer material article such as an ophthalmic lens
A method of releasing from the mold a transparent polymer material article formed in a cavity of a two-part mold by polymerizing a liquid polymerizable substance includes the step of uniformly...
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6024902 |
Injection molded paired thermoplastic spectacle lenses suited for fully automated dip hardcoating
Plastic injection-compression multi-cavity molding of flash-free improved-cleanliness thermoplastic spectacle lenses (16) are suitable to be robotically dip hardcoated. Special spring-loaded (25,...
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5982565 |
Plastic lens and method of making the same
A plastic lens includes an optically functioning section, a flange section disposed at an outer periphery thereof, a reference surface formed at an outer peripheral portion of the flange section...
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5939136 |
Process for preparation of optical fiber devices using optical fibers with thermally removable coatings
A method of making an optical fiber device, which comprises the steps of providing an optical fiber element comprising an optical fiber having at least one thermally removable coating thereon, and...
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5853627 |
Plastic molding apparatus and method
A plastic molding apparatus and method employs a pair of dies having at least one cavity with a mirror surface and wherein a plastic base material which is pre-molded is inserted into the cavity...
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5849222 |
Method for reducing lens hole defects in production of contact lens blanks
Improved homogeneity and uniformity of surface energy characteristics in a mold surface for hydrophilic contact lens production is achieved with the temporal application of a surface active agent...
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5820895 |
Conductive probe for heating contact lens mold assemblies during demolding
Demolding apparatus for reliably and repeatedly mechanically separating contact lens mold assemblies without damaging the contact lens formed therebetween. The mold assembly includes a frontcurve...
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5750060 |
Method and apparatus for injection compression molding and ejecting paired thermoplastic spectacle lens suited for fully automated dip hardcoating
Plastic injection-compression multi-cavity molding of flash-free improved-cleanliness thermoplastic spectacle lenses (16) are suitable to be robotically dip hardcoated. Special spring-loaded (25,...
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5679385 |
Apparatus for treating an ophthalmic lens mold
An apparatus for causing the polymerized excess monomer to separate from a molded lens by increasing the surface energy of the flange area of one mold piece, causing the polymerized excess monomer...
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5674557 |
Method for transiently wetting lens molds in production of contact lens blanks to reduce lens hole defects
Hydrophilic contact lens molds are transiently modified to provide a water dynamic contact angle equal to or less than 100° by treatment with a wetting agent which may be water or a surfactant...
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5573715 |
Method for treating an ophthalmic lens mold
An apparatus and method for causing the polymerized excess monomer to separate from a molded lens by increasing the surface energy of the flange area of one mold piece, causing the polymerized...
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5358672 |
Method for removing finished articles from glass, plastic or metallic molds
A method for demolding a molded article from a mold assembly having at least one mold with a molding surface includes the steps of: providing at least one tape segment on the molding surface of the...
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5316702 |
Method of producing durable bonds between an optical preform and an optical resin layer cast on the preform surface
A method of casting an ophthalmic optic is described. A mold, an optical preform and a polymerizable resin are provided. The resin is disposed between the mold and the optical preform. The preform...
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5271875 |
Method for molding lenses
A mold assembly includes first and second mold sections having respective first and second mold cavity defining surfaces, the first mold cavity defining surface terminating in an encircling...
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5264161 |
Method of using surfactants as contact lens processing aids
An improved method for manufacturing hydrophilic polymeric devices wherein surfactants are added to the hydration bath to assist in the mold release and processing of hydrophilic polymeric devices,...
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5254000 |
Organic polymer lens mold
A mold for an organic polymer, ophthalmic lens element has separate upper and lower mold members with each mold member being composed of a thermoplastic polymer. The lower mold member has a...
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5230840 |
Method of manufacturing thermoplastic/resin molded optical member
A method of manufacturing thermoplastic resin molded optical members comprising a thermoplastic resin material into a mold, defoaming thermoplastic resin material in vacuo at a specific temperature...
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5204126 |
Mold surfaces with ultra thin release films
A film forming composition including a film forming substance having amphiphilic molecules and being dispersed in a gel-like carrier having a non-liquid state below about 20° C. The carrier...
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5178800 |
Method for forming plastic optical quality spectacle lenses
A fast, relatively inexpensive method and simple is disclosed for producing a finished plastic multifocal or progressive lens from a preformed lens which has a predetermined lens correction (i.e.,...
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5160749 |
Three piece mold assembly for making an ocular device
A mold assembly for making an ocular device such as a contact lens, an intraocular lens or a lens blank has three pieces which include a sleeve, a first mold segment and a second mold segment. The...
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5158718 |
Contact lens casting
Hydrophobic casting moulds are treated with electrical discharge, such as corona discharge, to provide enhanced compatibility with hydrophilic objects introduced into the mould, without interfering...
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5143660 |
Method of casting a contact lens
A mould for cast moulding a contact lens comprises a first cup member having a male mould surface and a second cup member with a female mould surface. The two cup members form a piston and cylinder...
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5141677 |
Method of hot stamping intraocular lens bodies
A method for manufacturing an intraocular lens from a cell cast sheet of high molecular weight polymethylmethracrylate (PMMA). A lens blank having a lens generation area with a surface contoured to...
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5114455 |
Mold for producing lens, using mold recesses to aid in lens release
A mold for use in producing a lens comprises a pair of first and second mold portions which are arranged in opposed relation to each other. At least one of the first and second mold portions is...
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5096626 |
Process of molding a coated plastic lens
A plastic lens having a hard coat film and/or anti-reflecting film strongly adhered and having no defects such as yellowing, milky turbidities, cracks is provided. The plastic lens can be produced...
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5082690 |
Process for manufacturing a magneto-optic disc
The present invention provides a process for manufacturing a magneto-optic disc comprising at least a transparent substrate, a magneto-optic recording film, and a protecting film made of resin for...
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5080839 |
Process for hydrating soft contact lenses
A process for releasing leachable substances from a polymeric contact lens blank. the contact lens is confined in a cavity within a carrier to permit the hydration of the lens without permitting it...
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5061336 |
Gel casting method and apparatus
A gel casting method and apparatus are used to cause a pre-gelled liquid mixture to gel sequentially in a given travelling direction, allowing still-liquid material to flow to the gelling front,...
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5043106 |
Method of casting optical mirrors
A process for making optical mirrors which includes making a rough plaster casting to about the desired shape of the mirror, with the casting having a rough surface, and then applying successive...
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5013496 |
Process for molding a highly-refractive plastic lens
A process for producing a plastic lens having a high refractive index and profile regularity which includes forming a mixture of one or more of sulfur-containing aromatic polyisocyanate compounds,...
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4985186 |
Process for producing optical element
A process for producing an optical element wherein an optical molding is formed by using a mold and thereafter released from the mold by supplying a gas to the boundary between the mold surface and...
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4983332 |
Method for manufacturing hydrophilic contact lenses
An improved method for manufacturing contact lenses wherein monomer or comonomer mixture is placed into a mold caivty and subjected to polymerization conditions to form a polymerized shape of...
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4957663 |
Method of manufacturing optical components
A method of manufacturing components such as optical components (17, 18, 21, FIG. 2C) by means of a matrix which comprises a preform 12 of glass or quartz and has a skin 14 of a cured epoxy...
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4921205 |
Lens mold assembly
A mold assembly for casting optical lenses in which an integral lens blank-mold cup unit is created by placing liquid monomers in a cup mold which tightly adheres to polymerized lens material. A...
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4913857 |
Method for molding a transparent capsule
A transparent capsule is manufactured by using a lower die case having a substantially semi-spherical inner surface and an upper die cast having a substantially semi-spherical outer surface. The...
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4909969 |
Method and apparatus for removing a contact lens from a plastic mold
Fabrication of contact lenses whereby the yield of lenses removed from plastic casting molds is significantly increased. In fabricating contact lenses where a lens is initially formed in a plastic...
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4898604 |
Method of manufacturing a blank for a light-weight mirror with a supporting structure
A method of manufacturing a blank for a light-weight mirror. Graphite molding bodies are positioned at regular intervals on a base that functions as a mirror plate or backing plate. The base is...
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4883525 |
Glass-ceramic support for fusing and sagging ophthmalmic multifocal lenses
There is disclosed a low expansion glass-ceramic substrate for supporting a glass multifocal lens assembly during a fusing or sagging heat treatment. The substrate has baked on its supporting...
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4804970 |
Equiphase refractive antenna lens
A dielectric antenna lens for planar wavefront/focal point conversion is configured of a series of concentric rings, each of which is contoured from a rear face to inclined termination edges that...
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4761069 |
Contact lens and method of molding
A soft contact lens made of a hydrated polymer with an overall water content in the range of 40% to 90% by weight has a water content at the front surface of the lens which is at least 3 percentage...
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4637904 |
Process for molding a polymeric layer onto a substrate
Process for forming a polymeric layer on a substrate comprises placing a substrate to be coated in a mold having a removable lid, injecting a liquid monomer into the mold and into contact with the...
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