Abstract: Ophthalmic abrasive wheel including a plurality of swarf clearing grooves formed across the cutting surface and having closed profiles such that the swarf clearing grooves do not open to or exit the side of the abrasive wheel. The swarf clearing grooves are spaced around the cutting surface of the wheel and are configured so as to be substantially angled either towards or away from one another.

Abstract: The present invention relates to a beveling wheel and method for forming a beveled lens with the beveling wheel for use with eyeglasses. One embodiment includes a prescription lens for use on an eyeglass frame having a receiving channel. The receiving channel includes a channel bottom and opposed interior wall surfaces having a first angle therebetween. The prescription plastic lens includes a prescription lens body generally defined by a peripheral edge having a bevel extending away from the edge to a vertex. The bevel has a distal portion with a second angle. The bevel is receivable within the receiving channel. At least a portion of the vertex of the bevel has an interference fit with the receiving channel bottom when held within the eyeglass frame. The first angle is greater than the second angle.

Abstract: A laminate has two layers of glass which are bonded together by a monomelic adhesive containing an effective amount of a photochromic moiety.

Abstract: A laminate has first and second layers of glass between which are sandwiched first and second layers of polyvinyl butyral resin wherein the first polyvinyl butyral resin layer consists essentially of polyvinyl butyral resin and an ultraviolet absorber and the second polyvinyl butyral resin layer consists essentially of a polyvinyl butyral resin, a photochromic moiety and a free radical inhibitor

Abstract: An article such as an ophthalmic lens has a layer of a cross-linked organic polymeric matrix containing a tinting material in a gradient concentration. The tinting material is a dye, a photochromic moiety or a combination of a dye and a photochromic moiety. Various methods of making the article are disclosed.

Abstract: A photochromic article such as an ophthalmic lens has a substrate of a cross-linked organic polymeric matrix with a surface layer. The polymer in the surface layer is more porous than the polymer in the remainder of the substrate and the polymeric matrix in the surface layer contains a photochromic moiety. A method of making a photochromic article includes the steps of curing a cross-linkable pre-polymer to beyond a gel state to form a substrate of a partially cured polymeric matrix, inhibiting further curing of a surface layer of the substrate of partially cured polymeric matrix, and then incorporating an effective amount of a photochromic moiety into the surface layer either before or after substantially completely curing the remainder of the polymeric substrate.

Abstract: An transparent or semitransparent plastic eyeglass frame contains a photochromic moiety and has photochromic properties.

Abstract: A bevel edging wheel is described which has differing hardness abrasive matrices on the bevel cutting surfaces. The bevel edging wheel, which is suitable for edge finishing of an optical lens, includes: (1) a hub portion for attachment to a rotary power source: and (2) an outer circumferential cutting surface having a width, the surface including a bevel edging portion including a first abrasive surface and a second abrasive surface adapted for forming a bevel edge on a lens. The first abrasive surface comprises a first abrasive matrix, and the second abrasive surface comprises a second abrasive matrix wherein one of the first abrasive matrix or the second abrasive matrix has an effective hardness greater than the other.

Abstract: A bevel edging wheel which has differing hardness abrasive matrices on the bevel cutting surfaces.

Abstract: A spike for a golf shoe is provided which has a base portion adapted for attachment to the golf shoe for providing traction on turf. This spike is injection molded with a mixture of a polymer material and an abrasive grit material. As such, this material improves the resistance of the spike to wear and abrasion.

Abstract: An attachment system for a lens surfacing and polishing pad adapted for use with a lapping tool is described. The lapping tool includes a curved surface having a metallic surface disposed on at least a portion thereof. The pad has a configuration conforming to the curved surface of the lapping tool and includes a first abrasive surface and a second metallic surface. The metallic surface of the lapping tool may be magnetized, either selectively or permanently, permitting the metallic substrate surface to adhere thereto, thus removably fastening the pad to the lapping tool. Alternatively, the metallic surface of the pad may be magnetized, permitting the metallic surface of the lapping tool to adhere thereto, thus removably fastening the pad to the lapping tool.

Abstract: An abrasive article produced by a molding process including injection molding blow molding, extrusion, and thermoforming where the article includes a thermoformable material having an abrasive grit intermixed homogeneously therein.

Abstract: Spacing of diamond on a substrate is accomplished by mixing diamond and tungsten grits of approximately the same particle size and attaching it to a substrate.

Abstract: An abrasive article produced by injection molding or the like, utilizing a thermoformable material with abrasive grit intermixed homogeneously therein.

Abstract: An abrasive article produced by a molding process including injection molding blow molding, extrusion, and thermoforming where the article includes a thermoformable material having an abrasive grit intermixed homogeneously therein.

Abstract: A surfacing pad adapted for use with a lapping tool has a substrate sheet having a plurality of mushroom-shaped projections which interlock with a number of loops on a lapping tool for retention of the pad on the tool. A segmented projection means is also provided.

Abstract: An improved method of finishing surfaces having irregular stepped portions or other edges and improved apparatus therefor. The method of the present invention includes rough finishing the surface by utilization, of a rotary tool with a first abrasive pad attached thereto. The first abrasive pad includes an abrasive body portion with an outer peripheral edge. A substantially flexible outer rim portion extends outward from the peripheral edge of the pad. According to a second step of the present invention, finished sanding of the surfaces is accomplished by utilization of a rotary tool with a second abrasive pad attached thereto. The second abrasive pad includes a backing substrate and at least one abrasive segment attached thereto. The total abrasive surface encompassed by the abrasive segment is from about 1% to about 30%.

Abstract: An abrasive article produced by injection molding or the like, utilizing a thermoformable material with abrasive grit and secondary fillers intermixed homogeneously therein.

Abstract: An apparatus and a method for accommodating for differential in an ophthalmic lens grinding operation utilizing bevel edger machines. Such machines typically include a lens former assembly which has a former member upon which a particular frame shaped template rides to form the proper shape of the lens. The method includes the steps of adapting the former lens assembly of the bevel edger machine, externally of the differential settings of the machine, to provide a first profile for increasing the differential profile of the former member for a first lens-like material and allowing for providing a second differential for the former member which provides a proper differential for a second lens blank material. This may be accomplished in providing an adapter which is interposed between the former wheel and the lens template or a stepped former member. This provides for a new differential external to the internal adjustments of the machine.