Abstract: A multi-colored silk screen printing machine has an improved electric resistance heating station to cure silk screen printed ink on a substrate such as a textile. A control system has a proximity switch that detects the presence of a pallet within the heat curing station and starts supplying electrical power to a bank of electric resistance heaters automatically only when a pallet is present. An infrared temperature sensor is used to measure the ink temperature when the bank of electric resistance heaters is heating the printed ink on the textile. The infrared sensor provides a signal to a control system that interrupts power to the bank of electric resistance heaters when the signal exceeds a preselected maximum ink temperature value. A timer can also be used to override the infrared temperature sensor. A sheltered passageway and a low level air flow therethrough protect the face or lens of the infrared sensor from gases, smoke or other types of contamination.

Abstract: A stackable tray (11) functions with an adjacent stacked tray (12) to form a substantial enclosure (32) about an upper tray surface (15) formed by the tray sidewalls (17, 18) and tray endwall (21) and the lower surface (16') of an adjacently stacked tray (12). A break away separator (38) divides the enclosure (32) storage area into separate storage channels (40, 41) but may be broken away to form a larger channel area. Removable dividers (36) are selectively positioned in one of a plurality of spaced grooves (35) formed in the upper tray surface (15) to limit the depth of entry of stored items (34) into the substantial enclosure (32). Notches (28) and complimentary tabs (29) formed in lips (26) and grooves (27) of the sidewalls (17, 18) function to prevent sliding movement between adjacently stacked trays.