| 摘要 |
A lap (10) used for the grinding, fining and polishing of glass and plastic lenses is constructed of a one-piece injection-molded reinforced polymer body (12). The front surface (14) of the lap is curved and adapted to receive an abrasive pad. The rear (12) of the lap has a skeletal rib structure (19) of projecting interconnected ribs (20). Polymers suitable for forming the lap include various crystalline polymers and copolymers having adequate chemical resistance, strength, rigidity and thermal resistance. <IMAGE> |
