Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – Including both heating and cooling means
Reexamination Certificate
2007-08-14
2007-08-14
Gupta, Yogendra N. (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
Including both heating and cooling means
C425S393000, C425S397000, C425S398000, C425S403100
Reexamination Certificate
active
10487512
ABSTRACT:
Blanks (12) of thermoplastic material are heated, and a thermoforming step is performed in which the heated blanks are deformed plastically by stretching. Before the thermoforming step, a die-punching step is performed in which the peripheral regions of the blanks are deformed by die-punching while the material of the blanks is held captive on the outside. The installation includes heater means (16) for heating said blanks, thermoforming means (24), and a die-punching tool (26, 28) suitable for deforming the peripheral regions of the blanks before they are thermoformed.
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Michelon Bernard
Schwab Dominique
Erca Formseal
Ewald Maria Veronica
Gupta Yogendra N.
Sutherland & Asbill & Brennan LLP
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