Inflatable article

Details Inflatable article Inflatable article

1991-04-08

1992-04-07

Yu, Mickey

Amusement devices: toys

Inflatable

Having separately inflatable parts

446220, 273 58B, 273 58BA, A63H 2710

Patent

active

051023652

ABSTRACT:
Disclosed is an inflatable ball including at least an upper layer, a lower layer and an intermediate layer of flexible sheets, which are overlapped and heat-sealed together along their circumferences so as to form an inflatable upper chamber between the upper and intermediate layers, and an inflatable lower chamber between the lower and intermediate layers. The intermediate layer is made to contract in its heat-sealed circumference after heat sealing, thus obtaining an improved inflatable ball which requires smaller inflation pressure, and which results in smaller deformation in its upper and lower layers in an inflated state.

REFERENCES:
patent: 2463517 (1949-03-01), Chromak
patent: 4172301 (1979-10-01), Everard et al.
patent: 4268030 (1981-05-01), Richards
patent: 4335536 (1982-06-01), Magid et al.

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