Abstract: The present invention is for a method of testing a seal on a collapsible tube dispensing orifice during the manufacturing process in an assembly line. Air pressure is applied within the tube wall, at a station in the line, on one side of the seal, and the pressure is monitored on the other side of the seal within a reciprocating cover, for any increase in pressure which would indicate a leak in the seal.

Abstract: An apparatus for use in the generation of ophthalmic products from blanks comprises a mechanism for rotating the blank about an axis of rotation. A cutter tool imparts a desired surface configuration onto the rotating blank. A first moving mechanism moves the cutter tool in a first direction oriented parallel to the axis of rotation of the blank. A second moving mechanism moves the cutter tool in a second direction oriented transverse to the first axis. A digital electronic system controls the angular displacement of the blank with respect to a reference plane containing the blank, and controls the movements of the cutter tool in the first and second directions. The movements of the cutter tool in the first and second directions, and the angular displacement of the blank about the axis of rotation are all controlled independently of one another by the digital electronic system.

Abstract: Novel anti-static and/or anti-reflective optical elements are produced by coating at least one surface of an organic polymeric plastic substrate with a protective organo-silica coating composition and then subjecting the coated plastic substrate to a glow discharge treatment.