Abstract: An apparatus (10) for simultaneously inverting a plurality of semiconductor devices includes a conveyor (12) for conveying an input tray below a frame (32) having a primer tray captured therein by tray captivators (64). The input tray is elevated by an elevator (20) and the primer tray is lowered by lowering the frame (32) until the trays are closely adjacent. After the tray captivators (64) release the primer tray, tray clamps (44) are moved inwardly to extend over the sides of the trays, and jaws (52, 56) are moved to clamp the trays together. The frame (32) is rotated to invert the clamped trays. The input tray s then captured by the tray captivators (64) as the tray lamps (44) are released and acts as the primer tray for the next operation. After release of the tray clamps (44), the ay including the devices in an inverted orientation is lowered to be conveyed by the conveyor (12).