Locking pitch for pitch reservoir nipples

Details Locking pitch for pitch reservoir nipples Locking pitch for pitch reservoir nipples

1974-10-03

1976-08-24

Morris, Theodore

Compositions: coating or plastic

Coating or plastic compositions

Cellulose liberation waste liquor, solid, or reaction...

106283, 106284, C08L 9702, C08L 9500

Patent

active

039764966

ABSTRACT:
A locking pitch composition for depositing within the pitch reservoir of graphite nipples of the type including such voids. The composition is a heat-foamable, thermoplastic material including particulate pitch in a lignin sulfonate-based binder. The composition may be deposited into the reservoirs of the nipples by direct extrusion at ambient temperatures. When a nipple thus prepared is utilized in an electrode joint assembly, the high temperatures provided at the electrode joint foam the composition to expand it into adjacent thread spaces at the joint. Continued heating then carbonizes the composition to lock the joint.

REFERENCES:
patent: 1221259 (1917-04-01), Woddrop
patent: 1699294 (1929-01-01), Hoskins
patent: 3303031 (1967-02-01), Shields

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