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:
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:
A one-piece abrasive sheet and method of manufacture. The abrasive pad has a planar sheet portion with a plurality abrasive protrusion extending therefrom. The protrusions are intimately molded with the planar sheet portion to form a one-piece sheet. Thermoplastic and abrasive grit mixture may be used to form the sheet. The resulting pad has improved durability.Also disclosed is an improved circumferentially outer lip structure with a ramp surface for improving performance of the pad over irregular surfaces or surfaces with edges or steps or the like.
Abstract:
A multilayer abrading tool is produced by first providing a tool substrate with an irregular abrading surface. The irregular surface is covered with metal balls which are brazed thereto to form a structured surface. An abrasive grit coating is provided by mixing a temporary binder, an abrasive grit material and an infiltrant powder material. This coating is then applied to the structured surface. The tool is then heated to drive off the binder and to cause infiltration of the infiltrant in the abrasive grit to form a multilayer of diamond grit suspended in a braze matrix which is attached to the structured surface of the tool substrate.
Abstract:
A method for reconditioning diamond abrasive generator wheels having a layer of diamond particles brazed to the grinding surface involves heating the braze, binding the diamond particles above the liquid melting point, reorienting the diamond particles to increase their abrasive effect, then cooling the braze with the reoriented diamond particles until it resolidifies.
Abstract:
A multilayer abrading tool is produced by first providing a tool substrate with a structured abrading surface. An abrasive grit coating is provided by mixing a temporary binder, an abrasive grit material and an infiltrant powder material. This coating is then applied to the structured surface. The tool is then heated to drive off the binder and to cause infiltration of the infiltrant in the abrasive grit to form a multilayer of diamond grit suspended in a braze matrix which is attached to the structured surface of the tool substrate.
Abstract:
An apparatus for lapping of ophthalmic lenses has a spherical bearing for supporting a rod, one end of which carries a lapping tool. The spherical bearing has a race and ball through which the rod is fixedly secured. The ball has a generally vertically extending channel facing the race and the race has a guide pin which slidably extends into the channel thus allowing the ball free pivotal but not free rotational movement with respect to the race.
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.