Metal working – Method of mechanical manufacture – Electrical device making
Patent
1996-08-19
1998-01-06
Echols, P. W.
Metal working
Method of mechanical manufacture
Electrical device making
29876, 219421, 219424, 219541, 425549, H05B 300, B29C 4520
Patent
active
057041130
ABSTRACT:
A method of making an integral heated nozzle using a terminal locating and sealing key. A spiral portion of an electrical heating element is press fitted into a spiral groove in the cylindrical outer surface of an elongated inner portion. The remaining outwardly extending terminal portions of the heating element are inserted through two holes in the key and the key is pushed inwardly to a position against the inner portion. The key has a pin portion which is received in a matching hole in the inner portion to exactly determine the length of the spiral portion of the heating element and accurately locates the terminal portion of the heating element. An outer collar portion having a slot in which the key is received is then mounted in place around the rear end of the inner portion. A thermosetting ceramic sealant is applied in the space between the inner and outer collar portions then heated to integrally joint them together. The key fits in the slot in the outer collar portion to prevent leakage of the liquid sealant out through the slot.
REFERENCES:
patent: 5235737 (1993-08-01), Gellert
patent: 5507635 (1996-04-01), Gellert
patent: 5614233 (1997-03-01), Gellert
Echols P. W.
Mold-Masters Limited
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