Abstract: Apparatus for monitoring fluid contaminant level that includes a light source positioned on one side of a fluid sample path for directing light energy into fluid flowing in the sample path, a photosensor positioned on the same side of the sample path, and a reflector positioned on an opposing side of the sample path for receiving light from the source transmitted through the sample fluid and reflecting such light back through the fluid to the photosensor. The photosensor provides an electrical signal as a function of intensity of light incident thereon from the light source after having twice passed through the fluid, and the concentration or level of contaminants in the fluid is indicated as a function of such electrical signal. Thus, the concentration of contaminants that extinguish light energy transmitted through the fluid is indicated as an inverse function of light intensity at the photosensor, and may be compared to a preset target threshold level for indicating an undesirably high contamination level.

Abstract: A container inspection process and apparatus is provided for detecting the presence of contaminants present on or absorbed into the walls of plastic containers. The process flushes volatiles from within the container by injecting gas, draws a vapor sample from within the container and analyzes the sample by ionization techniques.

Abstract: A container inspection process and apparatus is provided for detecting the presence of contaminants present on or absorbed into the walls of plastic containers. The process flushes volatiles from within the container by injecting gas, draws a vapor sample from within the container and analyzes the sample with an ionization instrument.

Abstract: A control system for an accumulating conveyor having a plurality of zones wherein each zone has a pneumatic logic module that includes a relay limit valve and one or more OR valves. The output of one OR valve is connected to air actuators which affect driving engagement and disengagement of drive rollers with the load carrying rollers of a zone of the conveyor. A pilot operated relay valve is connected to the discharge zone of the conveyor and employed to release an article thereon. The control system can easily be modified to provide accumulation in either direction, as well as single, sequential or train release in both directions.

Abstract: A control system for an accumulating conveyor having a plurality of zones, wherein each zone includes an improved pneumatic logic module comprising a relay limit valve and an AND valve, the output of the AND valve being connected to a driving input of a fluid motor for transmitting power to the corresponding zone of the conveyor. A pilot operated relay valve is connected to the first zone and employed to release an item thereon. The control system can be easily modified to provide forward or reverse accumulation, and single or train release. Additional pilot operated relay valves are employed for selecting between forward and reverse accumulation and single additional pilot and train release modes.