Date coding play balls

Details Date coding play balls Date coding play balls

1989-12-01

1991-08-13

Marlo, George J.

Card, picture, or sign exhibiting

Check, label, or tag

Game ball-carried indicia

273 50B, 273 58K, 249103, B44F 700, A63B 4502, A63B 3900

Patent

active

050385046

ABSTRACT:
A hollow molded article such as a ball of the kind used in play areas where children jump on and swim through a volume of the balls. During molding, date coding is impressed on the balls in a way which enables the older balls to be identified and replaced when necessary. The date coding is provided in two ways, one is to provide an adjustable pin within a part of the mold cavity, and the other is to provide indicia whose positions can be changed by rotation of the air venting plug within the mold.

REFERENCES:
patent: 4660834 (1987-04-01), Carrigan
patent: 4874169 (1989-10-01), Litchfield

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