Food tray and method of making the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 7, 1994
Grant Date -
N/A
app pub date -
Dec 30, 1992
filing date -
Dec 30, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A food container thermoformed from nucleated polyethylene terephthalate sheet. The food container comprises an opaque or colored tray formed from nucleated polyethylene terephthalate in a crystalline state so that the tray remains rigid at elevated temperatures. The food container also comprises a substantially transparent cover formed from nucleated polyethylene terephthalate in an amorphous state. The food container also comprises a hinge that connects the cover to the tray. The method for producing this food container comprises the steps of extruding nucleated polyethylene terephthalate into a continuous sheet; independently controlling the temperature of the mold portions for the cover, tray and hinge components of the food container; thermoforming the nucleated polyethylene terephthalate sheet; maintaining the tray component of the container at a temperature sufficient to crystallize the nucleated polyethylene terephthalate in the tray component; and cooling the cover component of the container to a temperature sufficient to produce nucleated polyethylene terephthalate in an amorphous state.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully