Method for use in making a selectively vapor deposition coated t

Details Method for use in making a selectively vapor deposition coated t Method for use in making a selectively vapor deposition coated t

1982-07-06

1983-05-31

Pianalto, Bernard D.

Pipes and tubular conduits

Flexible

Distinct layers

138 99, 138143, 138145, 138178, 174DIG8, 427 39, 427 50, 427107, 427124, 427125, 427237, 427238, 427282, 427300, 427307, F16L 1100

Patent

active

043856454

ABSTRACT:
An apparatus for use in selectively coating all or a portion of the interior surface of a tubular article, the apparatus including a plurality of axially spaced apart masks adapted to fit within the tubular article, support structure spacing apart the masks, and an electrically conductive coating means between the masks. The coating means may be electrically activated to spray the unmasked portion of the inside surface of the tubular article.
The apparatus is useful in making tubular articles which are coated on their interior surfaces at selective locations. An alternative embodiment of the apparatus includes masks which have been chamfered. When this alternative apparatus is used to coat the interior surface of the interconnect, a non-uniform coating is delivered to the ends of the area which are coated. Using this alternative apparatus, a stress graded coating may be applied to the selectively coated interior surface.

REFERENCES:
patent: 2891880 (1939-06-01), Nakken
patent: 2953483 (1960-09-01), Torok
patent: 3565644 (1971-02-01), Al
patent: 3699917 (1972-10-01), Deverse
patent: 3898389 (1975-08-01), Clabburn

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