Abstract: An apparatus and method for removing a molded ophthalmic lens from between the mold portions in which it is produced. A source of intense electromagnetic radiation, preferably a carbon dioxide (CO.sub.2) laser of about 80 Watts at a wavelength of 10.6 .mu.m, is applied to at least one of the mold portions. The exposure of the mold portion to the laser is between one half and one second. Differential expansion of the heated mold polymer relative to the cooler polymer shifts one surface with respect to the other, and the shear force breaks the polymerized lens polymer mold adhesion and assists in the separation of mold portions. The greater the temperature gradient between the surfaces of the mold portions, the greater the shearing force and the easier the mold portions separate. The heated back mold portion is promptly removed so that very little energy is transferred to the polymer lens, avoiding the possibility of thermal decomposition of the lens.

Abstract: A method and apparatus for heat stretching a synthetic fiber rope. The rope is attached to tensioning members and suspended in a liquid medium so that this extends in a generally horizontal direction. The liquid medium has a specific gravity which is approximately equal to that of the rope at the desired stretching temperature, so that the rope is buoyed by this in order to relieve the weight of the segment from the tensioning members. The liquid medium is then heated so that the rope is uniformly heated to the stretching temperature, and tension is applied between the tensioning members so as to stretch the segment of rope to a predetermined increase in length.

Abstract: A process for making a light polarizing spectacle lens and the light polarizing spectacle lens product. The process includes drying a polarizing film at approximately 140-160.degree. F. for approximately 2-2 hours in order to drive out any transport media from the polarizing film. The process next includes forming the dried polarizing film into a wafer, curving the wafer at a specific time and temperature range, notching the curved wafer to align with a pair of gasket protrusions, and positioning the wafer within a lens mold. The process additionally includes adding a lens resin to the lens mold containing the wafer so that the lens resin includes a pregelled monomer in a weight percent of 65-75% and curing the lens.

Abstract: A process for the production of light-polarizing films containing polyvinyl alcohol, dichroic dye-producing components, optionally other dye-producing components, optionally additives, and optionally surface active compounds, wherein the films comprise two or more layers and said film layers have a sudden change in composition at the layer phase boundaries between at least two layers, and said layers are applied to a substrate by means of a multiple coater.

Abstract: An acoustic diaphragm is manufactured from a film of para-orientation aromatic polyamide through a molding process. In the molding process, the die for the molding process is heated to a predetermined temperature and then the molding press is conducted onto the film of para-orientation aromatic polyamide. The combination of the dies and film are cooled into about 80.degree. C. and then the clamping of dies is released to take the pressed film off.

Abstract: A method and apparatus for forming a coreless paper roll having a specifically shaped central aperture. A probe is inserted into the central aperture of the roll after the winding mandrel has been removed from the roll to change the configuration of the central aperture over at least a portion of the length thereof.

Abstract: A method for producing a substrate sheet for optical recording media, including the steps of continuously forming an ultraviolet-curable resin layer on at least one of i) a roll stamper having thereon a preformat pattern corresponding with preformatting information and ii) a substrate sheet; bringing the substrate sheet into close contact with the roll stamper having the ultraviolet-curable resin layer; curing the ultraviolet-curable resin layer to fix it on the substrate sheet; peeling from the roll stamper the substrate sheet having the cured ultraviolet-curable resin layer; and removing any ultraviolet-curable resin remaining on the surface of the roll stamper, after peeling the substrate sheet.

Abstract: The intensity of a beam of light used to etch concentric servo tracks on a magnetic medium is adjusted with an acousto-optical device to maintain a substantially constant energy density delivered by the beam while the optics which generate the beam move radially of the disk.

Abstract: In a continuous process for the production of high strength polyester yarn with enhanced low shrinkage the improvement comprising maintaining the traveling yarn about a pair of heated draw rolls for a period of at least 0.25 seconds, maintaining the air temperature in the region about said traveling yarn for said period at a temperature of at least 220.degree. C., said draw rolls each having a surface temperature of at least 220.degree. C. and a substantial portion of its surface with a surface roughness value of at least 50 microinches, whereby said yarn is heated sufficiently to obtain a substantial relaxation between said heated draw rolls and said relaxation roll system, thereby providing enhanced low shrinkage. Polyethylene terephthalate industrial yarn having an intrinsic viscosity of at least 0.78, a dry heat shrinkage DIN.sub.177 of less than 2.0%, a dry heat shrinkage DIN.sub.200 of less than 4.5%, and a tenacity of at least 7.2 grams per denier is a part of the invention.

Abstract: Spliced end portions (30--30) of two optical fibers are recoated in a manner which results in the cross section of the spliced length of fiber transverse to a longitudinal axis thereof being substantially constant. This is accomplished without compromising the adhesion of a curable recoating material (51) to an adjacent original coating material (38). In order to provide such a recoated portion, original coating material which is removed to permit splicing is removed in such a manner as to leave a tapered portion (52) remaining on the end portion of each optical fiber. As a result, the interface between the recoating material and the original coating material is increased sufficiently to avoid having to overlap some of the recoating material with original coating material on adjacent portions of the fibers being spliced.

Abstract: An improved lamp assembly for a motor vehicle and a method for molding same is provided in which a one-piece lamp having one or more colors or reflective means integrated in a single lens panel and frame is molded in a single plastic injection process. In the process, one or more colored or reflective elements are placed between two mold segments, the mold segments are closed, and a plastic is injected into the mold cavity in bonding securement of the colored or reflective elements.

Abstract: A method for forming soft, resilient, smooth, energy dissipating articles from foamed partially cross-linked polyolefins wherein sheet stock is cut into a preform and the preform while at room temperature is positioned within a mold cavity formed by partible mold halves. The preforms and the cavity of the molds are so arranged and constructed that after molding there is no flashing needing trimming because the polyolefin is substantially confined within the cavity without any lateral projection into the parting surfaces of the mold.

Abstract: A process for molding hydrophilic contact lenses comprising the steps of providing lens forming liquid comprising hydrophilic monomer mixed with solvent and polymerizing the liquid between two mold halves. The improvement comprises substantially removing the solvent by evaporation at temperature no higher than about 100 degrees C.

Abstract: A mated pair resilient and rigid embossing rolls are disclosed for achieving the advantages of conventional rubber to steel embossing, while avoiding the problems of conventional embossing approaches. In particular, a laser can be utilized to form recesses in a resilient roll such that the resilient roll receives protuberances of a rigid male embossing roll when the rolls are placed in contact. By providing recesses on the resilient roll, the pressure or force required for causing the rubber to flow around the protuberances can be significantly decreased as compared to conventional rubber to steel embossing. As a result, wear on the rolls is reduced, and smaller diameter rolls may be utilized, thereby reducing the cost of the embossing equipment. In addition, since less pressure is required to cause the rubber to flow about the protuberances, roll deflection is not a problem, and an embossed pattern can be imparted having a consistent, high degree of definition across the width of a web.

Abstract: A light reflective body useful for a panel-type lighting or ornamental member with edge lighting is formed of a transparent inorganic or organic casted glass member, such as a transparent plate of polymethyl methacrylate which has foam layers unevenly dispersed in the inner or outer face of the member or plate. The organic casted glass member of the light reflective body is manufactured by (a) gelling organic glass beads and an organic glass monomer or prepolymer or a mixture of them and thereafter casting them with an organic glass monomer or prepolymer or a mixture of them in a framework; (b) spreading the foaming material on a ready-made organic glass plate and hardening it; or (c) tightly attaching an organic glass foam plate manufactured in advance to an organic glass plate. In accordance with the method (a) or (b), the foam layer is completely integral with the organic casted glass product. Method (c) can also be applied to an inorganic casted glass member.

Abstract: Disclosed is a method for embossing a fold line onto a plastic sheet by first heating the plastic above its softening point and then embossing the material by passing it between a knurled flat roller and a cooperating embossing roller having a series of ridges suitable for embossing the fold line.

Abstract: An improved process for spincasting contact lenses with differently shaped concave lens surfaces from the same mold design comprises providing molds with uniformly shaped concave surfaces, and spincasting in the molds a series of polymerizable mixtures. Contact lenses with differently shaped concave lens surfaces are obtained by varying the ratio of the monomers and an organic diluent in the polymerizable mixtures.

Abstract: A process for preparing silicone hydrogel contact lenses where machining operations are employed to produce a lens having a desired final shape. The silicone hydrogel contact lenses are prepared by:providing a monomeric mixture comprising a silicone-containing monomer, a hydrophilic monomer and an organic diluent;charging the mixture to a mold and curing the formulation in the mold to obtain a shaped article;removing organic diluent from the shaped article to improve machineability of the article; andmachining the shaped article to obtain a contact lens having a desired configuration.

Abstract: 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 for causing the loaded thermoplastic resin material to melt and to flow, and producing a molded optical member by gradually cooling off the mold in the upward direction from the bottom side while pressurizing the interior of the mold with an inert gas. The inner surface of the mold is preferably preliminarily coated with a release material such as fluoroplastic containing either fluorinated alicyclic group or a fluorinated heterocyclic group in the main chain.

Abstract: The optical disc of the present invention has a transparent substrate provided on the surface opposite to the surface of a metallic reflective film in contact with a recording layer, and reading of predetermined information is performed by permitting a laser beam to be incident from the transparent substrate side. That is, light is reflected on the surface on the opposite side to the surface of the metallic reflective film in contact with the recording layer, and by employment of such a mechanism, it becomes possible to enhance the reflectance in the metallic reflective film, and also the difference in surface reflectance between the concavity and the convexity is effectively corrected at the uneven pit portion with memorized information.