Abstract: A conveyor system includes a pair of endless chains each having a plurality of links and each constrained to drive around a common endless loop by a pair of spaced rotary sprocket assemblies. Each link of each chain carries an outwardly directed finger. Pairs of fingers one from each chain are arranged to engage a can to displace it along the forward run of the loop. Changing the spacings between the fingers to accommodate different sizes of cans on different runs is achieved by effecting longitudinal displacement between the chains which in turn is achieved by adjusting the angular spacing between the sprocket wheels on the sprocket assembly. The fingers of each pair open up as they pass around the sprocket assembly and close up on the can to hold the can captive for the length of the forward run.

Abstract: Apparatus for, and method of, through-the-valve testing the pressure levels within pressurized containers, particularly aerosol containers, without dispensing the container contents. The apparatus includes a vertically reciprocal head in which a small charge of gas under greater pressure than the highest pressure level to be tested for is isolated in a small chamber. The head is lowered onto a container being tested and an adapter on the bottom of the head interfaces with the valve on the container. The pressure of the charge in the head is released into the adapter and the container valve is actuated to provide a connection between the container pressure and the higher pressure in the head and adapter. Due to its small volume the pressure in the head and adapter readily equalizes to the level of the pressure in the container. This equalized pressure is sensed by a pressure sensor or transducer connected to the chamber in the head.