Abstract: In a method for producing embossing plates, in particular steel intaglio printing plates, a plane element is determined from a line drawing, the edge of the plane element defining a desired contour. A tool track is then calculated from the desired contour and a desired depth associated with the plane element, to be used for guiding an engraving tool such that the partial area is removed.

Abstract: A three-dimensional mirror-image duplicating carver for producing a three-dimensional mirror-image of a three-dimensional object. First and second platforms are rotatably connected to a frame about spaced apart parallel first and second axes, respectively, and also parallel to the base. The platforms rotate equal and in opposite directions only to effect repositioning. A three-dimensional object to be duplicated in mirror image is attached to and positioned centrally on the first platform while a carvable workpiece is attached to and positioned centrally on the second platform. A support member includes a stylus and a carving tool having a carving tip spaced from the stylus a distance equal to the distance between the first and second axes and lying in a plane perpendicular to said base.

Abstract: The present invention is directed to enhancing the accuracy with which tooth restorations are performed, including the manner by which a tooth is prepared and fit with a dental prosthetic, such as a crown or bridge. Further, the present invention is directed to reducing the skill-dependent tasks associated with tooth restoration, including root canals, while at the same time, improving the precision with which these procedures are performed and by aesthetics of the prosthetic. By improving the accuracy of restoration procedures, any need to repeat these procedures for a given patient can be eliminated and patient comfort can be improved. In addition, by improving the precision with which a prosthetic is prepared for attachment to the prepared tooth of a patient, and/or fit to patient, durability and longevity of the prosthetic are improved.

Abstract: Apparatus for orienting a pair of framed eyeglasses relative to an electronic scanner whereby the scanner then generated digital data defining the geometry of the frame. This data is entered into a computer to cause it to control a milling machine which shapes a blank to form a filter lens for an accessory that clips onto the frame and has a matching geometry.

Abstract: A machine and procedures for finish grinding of indexable cutting tool inserts made of tungsten carbide and other similar materials which includes a fixture for positioning inserts individually in a work holder and moving the work holder to a position in which the work is adjacent a rotating grinding wheel. Control device moves the insert into contact with the wheel with a gauge limiting the contact and also providing for rapidly turning an insert from one flat edge to another flat edge to avoid overgrinding of the corners and to speed up the ultimate grinding of all of the flat sides of a polygonal insert.