A vaccuum mandrel for forming a plastic pipe and inserting a seal ring in a groove in the pipe. The mandrel has plural segments mounted on inclined dowels so as to be expandible.

A gasket holding and feeding magazine is described which includes a plurality of similar, adjacent compartments, each of which is sized to hold a single gasket therein. The magazine is moved over a stationary floor plate within which is formed a bottom opening of size to permit a gasket to drop therethrough. As each compartment of the magazine is moved into registry above the floor opening, a gasket will drop through the opening and will be directed to a lower gasket holding and clamping plate. ...

A pipe belling method and apparatus are disclosed which includes an elongated frame to support all of the operating components. A pressure chamber is reciprocal upon frame supported rails between an initial position and a belling position for continuous plastic pipe belling operations. Within the pressure chamber is supported a shaped mandrel to impress a desired hub or bell shape in one previously heated end of a length of pipe. Transverse pipe clamps are carried upon the frame forwardly of the...

A pipe transporting machine is provided to move discrete lengths of pipe across the machine in incremental steps. A spaced pair of first and second indexing members are simultaneously reciprocal between a lower position and an upper position to alternately transversely move and then stop each length of pipe. Pluralities of kicker assemblies are spaced along each of the first and second indexing members to alternately traverse and stop each length of pipe upon each vertical reciprocation of the i...

A mandrel for forming a bell shape and an annular groove in the bell in one end of a plastic pipe which comprises a shaped profile and a plurality of identically formed segments which are movable relative to the profile. The segments are radially urged in identical radial paths from an initial position which is inwardly of the bell shaped profile to an expanded position wherein the segments cooperate and interact to form an expanded ring of diameter greater than the pipe bell, thereby to impress...

A method and apparatus for pressure forming plastic pipe bells utilizing external air pressure is disclosed. The apparatus includes a horizontally oriented, shaped mandrel, which may or may not have expanding segments for forming an internal groove in the pipe bell, mounted within a pressure chamber. A natural rubber circular gasket is positioned at the front end of the pressure chamber and the end of the pipe is pushed through the rubber gasket and over the mandrel. A pair of cooperating upper ...

A method and apparatus for pressure forming plastic pipe bells utilizing external air pressure is disclosed. The apparatus includes a horizontally oriented, shaped mandrel, which may or may not have expanding segments for forming an internal groove in the pipe bell, mounted within a pressure chamber. A natural rubber circular gasket is positioned at the front end of the pressure chamber and the end of the pipe is pushed through the rubber gasket and over the mandrel. A pair of cooperating upper ...

A pipe belling system utilizing external air pressure is disclosed which includes a horizontally reciprocating, shaped mandrel which may or may not have expanding segments for forming an internal groove in the pipe bell. A pair of cooperating upper and lower pressure clamps are oppositely vertically reciprocal relative to the bell end of the pipe and incorporate suitable seals, air inlet and outlet connections and water inlet and outlet connections to form a fluid pressure chamber to automatical...

Psoriasis in mammals is relieved by topically administering substituted naphthoquinone of the formula: ##STR1## wherein: R.sup.3 is halo, linear or branched alkoxy of one to eighteen carbon atoms or --S(O).sub.n R wherein: n is 0, 1 or 2; and R is a alkyl of one to eighteen carbon atoms, alkoxycarbonylalkyl, optionally substituted phenyl, optionally substituted phenylalkyl or optionally substituted heterocyclic aryl and the pharmaceutically acceptable salts of said heterocyclic aryl.

Polyamide-imides with phenylindane diamines incorporated into the polymer backbone have been found to be soluble in high concentration in polar organic solvents.