Method of making a molded plastic bowling pin

Details Method of making a molded plastic bowling pin Method of making a molded plastic bowling pin

1978-06-26

1980-07-08

Weston, Caleb

Metal working

Method of mechanical manufacture

Assembling or joining

264328, 264261, 264278, 273 82R, 156245, B29D 2700, B29D 910, B32B 106

Patent

active

042109922

ABSTRACT:
A molded plastic bowling pin incorporating a core extending the length of the pin substantially from its base to its head and constituted of a plurality of plastic core elements of varying sizes and shapes such that the composite pin incorporating the same meets the weight distribution standards set by the American Bowling Congress, and a shell defining the external configuration of the pin, the shell having a substantially uniform thickness about the core elements and being integrally molded on and firmly bonded thereto. The pin is manufactured by assembly of the internal core from the individual plastic core elements having the predetermined, desired weight distribution, and thereafter injection molding the shell directly thereon to define the composite, integrally molded bowling pin.

REFERENCES:
patent: 2797923 (1957-07-01), Dettman
patent: 2942885 (1960-06-01), Fontevelli
patent: 3229977 (1966-01-01), Guglielmo
patent: 3329430 (1967-07-01), Wanders
patent: 3332685 (1967-07-01), Halip
patent: 3971837 (1976-07-01), Hasegawa et al.
patent: 3984104 (1976-10-01), Negrini
patent: 4012386 (1977-03-01), Davis

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