Patent ID: 6758733
Filing Date: 2004-07-06
Classification: B24B,B24D

Abstract:
A bevel edging wheel for edge finishing of an optical lens comprising:a hub portion for attachment to a rotary power source; and an outer circumferentiated cutting surface having a width, said surface including a bevel edging portion including a first abrasive surface and a second abrasive surface adapted for forming a bevel edge on a plastic lens; said first abrasive surface comprising a first abrasive matrix, and said second abrasive surface comprising a second abrasive matrix wherein one of said first abrasive matrix or said second abrasive matrix having an effective hardness greater than the other; wherein said first and second abrasive matrices are bonded to the wheel; wherein said bevel edging portion is in the form of a substantially V-shaped groove having a plus curve side as said first abrasive surface and a minus curve side as said second abrasive surface, and wherein a finer grit is used in the first abrasive matrix and a courser grit is used in the second abrasive matrix; wherein the finer abrasive grit is from 1 to 3 grit sizes less than said coarser abrasive grit.