Abstract: A print arm for a screen printing machine of the type having radial print arms and radial pallet arms that rotate relative to the print arms the print arms incorporating a detachable print carriage drive assembly from which the print carriage is suspended the print carriage drive assembly incorporation an electrically driven belt to reciprocate the print carriage and the belt path is horizontal. In one embodiment a print assembly plate is provided as the base for the print carriage support assembly so that all the components are mounted to the plate and the plate can be easily attachable to the print arm. In a second embodiment a channel member is used in conjunction with three mounting plates instead of the one assembly plate.

Abstract: A carousel screen printing machine which includes a stationary frame supporting a plurality of print heads, a rotatable central column supporting a plurality of pallet support arms and a base for the rotatable column consisting of two base frame members joined at one end and extending away from each other at an acute angle and cross members extending between said base frame members. An elevated platform above the base frame is supported by a member extending from the junction of the base frame members and from adjacent the free ends of the base frame members. A stator support is located on at least one cross member and arranged so that the column extends through the elevated platform. At least part of the drive means for the rotatable column is located below the support platform.

Abstract: An energy-saving closure system is provided for use in preventing needless energy loss. The system employs a pivotal closure adapted to alternately move between the fully open and fully closed portion in a conduit for conveying gases relative to a combustion zone. The closure requires pressure diffentials only for being urged into the open and closed positions such as normally occur in the heating cycle. No energy-consuming, auxiliary apparatus is needed.