Plastic article or earthenware shaping or treating: apparatus – Dipping type shaping means – Dipping form per se
Patent
1983-03-01
1985-02-26
Derrington, James
Plastic article or earthenware shaping or treating: apparatus
Dipping type shaping means
Dipping form per se
2642978, 425269, B29H 304
Patent
active
045015457
ABSTRACT:
Articles such as balloons, beach balls, and other inflatable items are manufactured by dipping a number of suitably configured forms into a bath of molten latex, leaving the forms in the bath until a desired thickness of latex has been deposited on the forms, withdrawing the forms from the latex and permitting the latex to at least partially dry, and thereafter stripping the latex from the forms. In order to produce globular inflated articles, forms of a generally globular configuration have been used. Certain forms have utilized flutes or other deviations from an entirely globular configuration, but the outermost portions of prior forms used for the manufacture of globular articles are generally spherical. The greatest diametric dimension of the forms has limited the permissible form-to-form spacing. The invention employs a number of spoon-shaped forms each having a convex surface and a concave surface. The forms are arranged such that the convex portion of one form is placed in proximity with the concave portion of another form. By this configuration and arrangement of forms, a vastly greater number of articles can be manufactured compared with conventional techniques. An alternative embodiment of the invention employs a flattened form having a relatively great number of small flutes. The alternative embodiment is considerably thinner than prior fluted forms; the forms can be positioned closer together than can conventional fluted forms.
REFERENCES:
patent: D109795 (1938-05-01), Brannock
patent: D144599 (1946-04-01), Tupper
patent: D206186 (1966-11-01), Wallance
patent: 2238833 (1941-04-01), Tillotson
patent: 2373529 (1942-05-01), Beal
patent: 2461270 (1949-02-01), Habib et al.
patent: 3180914 (1965-04-01), Mallenfort
patent: 3870450 (1975-03-01), Graebe
California Ceramic Supply Co.
Derrington James
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