Hollow article and its manufacturing method and apparatus thereof
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United States of America Patent
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Feb 10, 2004
Grant Date -
Apr 17, 2003
app pub date -
Nov 21, 2002
filing date -
Feb 29, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is a hollow article with an integral impact absorbing rib and the method of manufacturing the same. The apparatus is a hollow article made of thermoplastic resin and integrally formed by blow molding, comprising a first wall and a second wall confronting across a spacing. There is an integral rib between the first wall and the second wall, wherein the integral rib comprises a flat rib between the walls and one or more hollow ribs adjacent to each of two side ends of the flat rib. The impact absorbing rib is disposed at intervals and in an impact action direction. The rib is uniform in shape, dimensions and wall width, and free from reduction of wall width of the inner rib, yet possessing proper structural support and mechanical strength, and excellent in impact absorbing performance.
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