Preformed plastic blank for making open mouth plastic containers专利检索-塑性收缩建筑材料专利检索查询-专利查询网

Preformed plastic blank for making open mouth plastic containers

阅读：666发布：2023-03-23

专利汇可以提供Preformed plastic blank for making open mouth plastic containers专利检索，专利查询，专利分析的服务。并且In apparatus for forming a thermoplastic parison having a rim portion encircling a central portion capable of subsequent deformation, the improvement of mold means contoured to retain thermoplastic material in the rim cavity to control the dimensions of the rim by preventing its shrinking away from the wall of the rim cavity upon cooling. The parison produced by such apparatus has a central bottom wall and a sidewall forming portion and a rim portion joined thereto by a thin web of material.，下面是Preformed plastic blank for making open mouth plastic containers专利的具体信息内容。

权利要求

1. A preformed plastic blank for making open mouth plastic containers, said plastic blank being substantially planar and having a circular planar central portion for forming the bottom wall of the container, said central bottom wall forming portion of said blank being of approximately the thickness of the bottom wall of the finished container, said plastic blank having an annular sidewall forming portion for the container surrounding and integral with the outer periphery of said bottom wall forming portion, said sidewall forming portion being of a thickness greater than the thickness of said bottom wall portion to permit stretching and thinning of the sidewall portion of the blank to generally cup-shaped form, a rim portion radially outwardly of said annular sidewall forming portion and of a cross section and outline of substantially the rim of the finished container and a web portion joining said rim portion to said sidewall forming portion, said web portion being thinner than any part of said sidewall forming portion.

2. The blank as set forth in claim 1 wherein the thickness of said web portion is less than one-half the thickness of the sidewall forming portion adjacent thereto.

3. The blank as set forth in claim 1 wherein the thickness of said web portion is approximately 0.030 inch.

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Preformed plastic blank for making open mouth plastic containers

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