Stretch forming hollow articles

Details Stretch forming hollow articles Stretch forming hollow articles

1981-09-02

1984-11-06

Silbaugh, Jan H.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Including product handling means

264550, 264551, 264292, 4253871, 425388, 425398, 425400, B29C 1703

Patent

active

044809794

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.

REFERENCES:
patent: 2985915 (1961-05-01), Winstead
patent: 3975493 (1967-08-01), Tigner et al.

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