Inflatable article
First Claim
Patent Images
1. An inflatable article comprising:
- at least three layers of overlapping flexible sheets;
said at least three layers including an upper layer, a lower layer and an intermediate layer disposed between said upper and said lower layers;
said st least three layers affixed to each other along peripheral edges thereof;
the intermediate layer separating said article into an upper chamber and a lower chamber;
said intermediate layer including means for contraction within said peripheral edges;
said means for contraction reducing a pressure required for inflation; and
said means for contraction reducing deformation of said upper and said lower layers when said upper chamber and said lower chamber are inflated.
1 Assignment
0 Petitions
Accused Products
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.
32 Citations
11 Claims
-
1. An inflatable article comprising:
-
at least three layers of overlapping flexible sheets; said at least three layers including an upper layer, a lower layer and an intermediate layer disposed between said upper and said lower layers; said st least three layers affixed to each other along peripheral edges thereof; the intermediate layer separating said article into an upper chamber and a lower chamber; said intermediate layer including means for contraction within said peripheral edges; said means for contraction reducing a pressure required for inflation; and said means for contraction reducing deformation of said upper and said lower layers when said upper chamber and said lower chamber are inflated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification