Patent ID: 6997783

Claim:
A method of removing a film layer on a glass plate, comprising the steps of: disposing a first grinding wheel on one lateral side of a path through which a glass plate is transported, disposing a second grinding wheel on another lateral side of said path, moving said first grinding wheel in X and Y directions in a first region of the glass plate on said one lateral side of said path, while grinding and removing a film layer in said first region of the glass plate due to said first grinding wheel; and moving said second grinding wheel in X and Y directions in a second region of the glass plate on another lateral side of said path, independently of moving said first grinding wheel in X and Y directions, while grinding and removing a film layer in said second region of the glass plate due to said second grinding wheel, concurrently with the grinding and removing of the film layer in said first region of the glass plate due to said first grinding wheel, said second region being different from said first region with respect to a place.