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US 4,950,445 AGranted
Method of vacuum forming disposable faceshield
AssigneeCabot Safety Corporation
InventorsArthur J. Salce, Richard T. Metcalfe
Life of this patent
Estimating the term…
Abstract
A method of making a protective shield with an optically clear viewing portion by vacuum forming over a mandrel wherein the viewing portion of said protective shield is maintained out of contact with the mandrel to define the optically clear viewing portion.
Claims10
A method of making a protective shield with an optically clear viewing portion, the viewing portion including a pair of opposed sides which comprises the steps of:
- providing a forming mandrel having lands for forming a pair of extensions and a pocket in the area of the viewing portion, wherein said pair of extensions extend outwardly along each opposed side of said viewing portion;
- applying a vacuum through holes extending through the lands;
- conforming said pair of extensions to the lands;
- and
- maintaining said viewing portion of said protective shield out of contact with said forming mandrel to define an optically clear viewing portion.
2 more elements
Dependencies are inferred from the claim text.