Apparatus and method of producing chair mats and the like

A machine for trimming the edge of a generally planar workpiece;

• comprising:
• a work table including means for rotating said work table about an axis extending generally perpendicular to and through the plane of the workpiece;
• generally planar template means on said work table for properly positioning the workpiece, said template means being of the general size and shape of the outer periphery of the workpiece;
• a router head with a router blade engageable with the edge of the workpiece, including a generally rigid frame and spring means resiliently mounting a router motor thereon, with the motor and router weight supported by said spring means, whereby said router head is mounted for movement toward and away from the workpiece to bring said router blade into engagement therewith;
• cam means on said router head for riding over the edge of the workpiece;
• guide means on said router head for engaging the outer periphery of said template means for guiding the router blade along the edge of the workpiece during rotation of said work table;
• means for biasing said router head toward the workpiece and said guide means into engagement with the outer periphery of said template means;
• and
• means on said router head for directing a cooling medium toward the area of engagement between said router blade and the edge of the workpiece.