Abstract: A multiple print head, automated screen printing machine is described with improvements for inspecting and cleaning a print screen. The print screen and its frame are locked securely in position within a print screen holder, which in turn is locked into a precise spacial relationship beneath a permanently installed print head frame. The rear edge of the print screen holder is hinged so that an operator can hand lift the holder upwards, or activate an air cylinder which causes the holder to pivot upwards at its front edge. Provisions are also made for moving the print carriage with associated squeegee(s) and flood bar(s) entirely away from the area occupied by the print screen holder. Print screen inspection and cleaning is accomplished without moving the print head frame, providing additional safety for operators during these maintenance procedures.

Abstract: A rear section pallet support plate locator and stabilizer is described for use in a screen printing machine. In place of traditional front plate locators or dual front and rear plate locators, a unique two tiered construction of the support plate provides for both front to back and side to side precise positioning and stabilizing of the entire support plate. A locator roller contacts a "V" shaped notch in a stepped lower rear section of the support plate, biasing stabilizer bars on the rear edge of the rear section against pre-positioned cam followers. Precisely positioning and stabilizing the rear section also positions and stabilizes the entire pallet support plate. The front section of the pallet support plate is now completely free of obstruction, permitting processing of closed end bags, long garments, and other objects that could not be processed with screen printing machines having front locator devices.