Apparatus and method for treating the interior surfaces of hollo

Details Apparatus and method for treating the interior surfaces of hollo Apparatus and method for treating the interior surfaces of hollo

1992-06-25

1994-03-01

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

1562726, 264571, 264 83, 264101, 42218605, 425174, 4251748R, B29C 7104

Patent

active

052904890

ABSTRACT:
Apparatus and method for treating the interior surfaces of hollow plastic objects to improve their adherency to and compatibility with another component, such as polyurethane foam. The invention consists of creating a vacuum in the object and drawing a conductive gas inside the object. A pair of electrodes are spaced apart from each other, and a source of electricity is provided thereto of sufficient intensity to produce an electrical discharge across the gap between the electrodes when an object is in the gap between the electrodes. The electrodes are arranged with regard to the size and configuration of the object to provide ionization of the conductive gas inside the object to surface treat the inner walls.

REFERENCES:
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patent: 3057795 (1962-10-01), Frohlich
patent: 3157785 (1964-11-01), Dobson et al.
patent: 3183352 (1965-05-01), Brandt et al.
patent: 3428801 (1969-02-01), Leach et al.
patent: 4315808 (1982-02-01), Imada et al.
patent: 4317788 (1982-03-01), Imada et al.
patent: 4511419 (1985-04-01), Kuhlmann et al.
patent: 4701290 (1987-10-01), Eschwey et al.

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