ABRASIVE FLUID JET CUTTING WORKPIECE SUPPORT

A support apparatus for supporting a workpiece in a high velocity fluid jet cutting operation. The apparatus has particular utility in the Abrasive cutting of frangible sheet material, such as glass, and especially in the cutting of a predetermined pattern from the sheet thereof. The support apparatus comprises a pair of independent support members that cooperate to provide uniform support to the entire area of the sheet during cutting. A first support member, comprising a plate which is relatively large with respect to the sheet, includes a central opening therein conforming to and slightly larger than the pattern being cut. The plate member provides support to the peripheral portion of the sheet while the central portion thereof is supported by a second support member positioned within the opening. The second support member includes a plurality of vacuum heads disposed inwardly of the edges of the opening for securely gripping the sheet, with each of the vacuum heads being independently adjustable to facilitate alignment with the first support member.