Abstract: A sheet support assembly for fluid jet cutting operation having a first support extending through and independent of a catcher tank of the cutting jet system to support the central portion of said sheet and a frame assembly mounted independent of said catcher tank to support selected edge portions of the sheet to be cut. The first support includes a vertically adjustable vacuum plenum to secure the sheet thereto. The sheet edge supports on the frame are vertically and horizontally adjustable so that they may support the edges of a variety of sheet sizes.

Abstract: Reverse contour changes, e.g., changes from a convex peripheral portion to concave peripheral portion are scored in a glass sheet by moving the glass sheet along an X-Y axes while pivoting a scoring wheel housing about an axis transverse to the first and second axes so as to positively rotate the housing in response to contour changes.Further, a pattern cutter includes a sheet support which is mounted for movement along X and Y axes and about a pivoting Z axis relative to a stationary scoring wheel so as to positively control the scoring of the glass sheet during changes from convex portions to concave portions.