Stretch forming hollow articles
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United States of America Patent
Stats
-
Nov 6, 1984
Issued Date -
N/A
app pub date -
Sep 2, 1981
filing date -
May 18, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus for stretch-forming a heat softened sheet of thermoplastics material. The apparatus includes a stretching tool and means to move the stretching tool relative to means holding the sheet so as to stretch the sheet in a preselected direction with the tool. The stretching tool includes a plurality of blades having edges for pressing against the sheet to stretch the sheet and a cam to move the blades transversely away from each other to stretch the sheet transversely of the preselected direction as the tool is moved to stretch the sheet in the preselected directions.
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