Abstract: A double-acting air-powered diaphragm pump having a pair of identical pump assemblies detachably secured within a frame-like manifold assembly. Each of the pump assemblies contains a pair of mating halves and a web-like resilient diaphragm defining an air cavity and a fluid cavity. Each of the diaphragms is operated by means of a centrally attached shaft, the facing ends of the shafts being joined by a chain link which allows for potential misalignment. The pump assemblies, which are substantially identical in construction, may be easily and individually removed from the manifold assembly for repair or replacement.

Abstract: A device for preventing trailing of glue extruded by an exclusion nozzle following termination of the dispensing of the glue. A pair of spaced apart orifices are positioned to direct a thin jet of air for a brief period of time on either side of the stream of glue being dispensed at the moment of glue cut-off to momentarily entrain the stream and draw it generally in the direction of the path of travel of the workpiece. The air jets are oriented so as not to touch or impinge on the glue stream, thereby preventing break-up of the glue stream.

Abstract: An air actuated adhesive application control valve using a resilient diaphragm to control reciprocation of the valve stem. Unsupported portions of the diaphragm are supported by a layer of the incompressible adhesive trapped within a fluid cavity adjacent one major surface of the diaphragm. Adhesive is permitted to enter the fluid cavity when the valve is in the closed position, but is prevented from escaping therefrom by a separate valve mechanism carried by the valve stem when the valve is in the opened position. The second valve element also serves as a stop to limit travel of the reciprocating stem, thereby controlling the valve opening clearance.

Abstract: In a labeling machine for cylindrical objects such as cans, having conventional means to apply glue to such object in a line parallel to the axis thereof, and having means for causing the object to roll over a stack of labels such that one end of the uppermost label in the stack is picked up by adhering to said line of glue, and is rolled around the object as it progresses in its rolling path; means are disclosed to apply a line of glue under pressure to the uppermost label in the stack at its trailing end in timed relation to the movement of the object in its path so that the trailing edge of the label adheres to the object as it continues its rolling path. Means are provided to adjust for objects of varying length and diameter, and for labels of different lengths.