Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – Making hole or aperture in article
Patent
1994-01-14
1996-02-20
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
Making hole or aperture in article
264154, 264238, 264255, 2642791, 264301, 264303, 264305, 264314, 425DIG19, B28B 148, B28B 138
Patent
active
054926645
ABSTRACT:
A primary outer shell includes, in its most preferred embodiment, a base and a wall which includes at least one embedded foreign object and defines openings into an inner cavity containing a burnable candle member which causes the outer shell to glow and cast shadows without melting. The outer shell is constructed according to a unique molding method which includes at least partially immersing a swollen distensible mold, such as a water-filled balloon, into a reservoir of molding material, such as wax, to allow the molding material to form a molded shell around the distensible mold. After the distensible mold with the attached molded shell is removed from the reservoir of molding material, it is placed upon a flat surface to form a flat bottom into the molded shell. A foreign object is then mounted to the molded shell, and the distensible mold with the attached molded shell is again immersed in the reservoir of molding material to form a second layer of molded material and embed the foreign object into the molded shell. Subsequently, the distensible mold is removed from within the molded shell, such as by popping the balloon and pouring out the water and balloon, to leave an inner cavity, and the outer shell is pierced to form openings into the inner cavity.
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Gray Robin S.
Isaf Louis T.
Kuester Jeffrey R.
Silbaugh Jan H.
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