Abstract: A conveyor belt tracking and drive mechanism for use with a short, wide conveyor belt system. The mechanism has a stationary frame with first and second roller journaled for rotation at a first and second end of the stationary frame. A first moveable frame is pivotally suspended from the stationary frame. A second moveable frame is pivotally suspended from the first moveable frame. The second moveable frame has a drive roller and motor operatively connected to the drive roller. A micro-tracking adjustment screw, disposed between the first moveable frame and stationary frame, is used to adjust the tracking of the conveyor belt by laterally moving the first and second moveable frame. A belt adjustment screw located between the first moveable frame and second moveable frame allows one as to adjust the tension of the short, wide conveyor belt by movement of the power roller against or away from the short, wide conveyor belt.

Abstract: A system for controlling and modulating the pressure between members of pairs of heating and/or cooling members or bars utilized in a heat sealing machine is disclosed. Closer, more sensitive control of the inter-bar gap and allowable sealing pressure is achieved by the provision of a fluid pressure adjustable, spring-biased system which can be used to modulate the maximum force applied to the band between the bars according to the type of configuration of material to be processed.