Stock material or miscellaneous articles – Structurally defined web or sheet – Honeycomb-like
Reexamination Certificate
1999-03-08
2001-04-17
Lorin, Francis J. (Department: 1775)
Stock material or miscellaneous articles
Structurally defined web or sheet
Honeycomb-like
C264S261000
Reexamination Certificate
active
06217977
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a gas blow shaped air cushion with multiple cells, when the air cushion is compressed due to movement, each of the cells has a proper space for elastic deformation.
2. Background of the Invention
In general, the air cushion on the bottom of a shoe is formed by mold injection, but the prior art injecting mold can not integrally form an air cushion with a plurality of hollow and independent cells. Thus, after injecting, the air cushion must be adhered with a plastic film on the surface of an air cushion with high frequency adhering. However, after compressed, the plastic film easily cracks so as to cause that the cell therewithin breaks. Moreover, the conventional air cushion made by injection mold is thicker, thus the softness and elasticity will be affected in moving and further the weight is increased. As a result, the conventional air cushion made by mold injection is heavier. This is a serious problem necessary to be improved.
SUMMARY OF THE INVENTION
Accordingly, the object of the present invention is to provide a gas blow shaped air cushion with multiple cells. The air cushion is formed by blowing air through an air inlet tube and a plurality of gas blow tubes with respect to each cell to insert into the mold cavities of the mold. A thermal flow channel is formed on the periphery of the air inlet tube for heating the air in the air inlet tube and the gas blow tube. Therefore, by the heat air in the gas blow tube, when the gas has been blown into the air cushion, the mouth for blowing air will be fused so as to be tightly sealed the hollow space in the air cushion. The gas blow shaped air cushion of the present invention has a width of only 0.8 mm~0.1 mm which is more thinner than the prior art mold injection and thus the weight of an air cushion is reduced.
Moreover, each two cells are retained with a proper gap, by which as the air cushion is compressed due to movement, each of the cells has a proper space for elastic deformation.
REFERENCES:
patent: 04255731 (1992-09-01), None
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