发明名称 |
Speisenbehälter und Verfahren zur Herstellung desselben. |
摘要 |
A food container (1) thermoformed from co-extruded polyethylene terephthalate sheet, a portion of which contains a nucleating agent. The food container comprises an opaque or colored tray (3) 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 (2) formed from non-nucleated polyethylene terephthalate in an amorphous state. The food container also comprises a hinge (4) that integrally connects the cover to the tray. The method for producing this food container comprises the steps of co-extruding nucleated and non-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 polyethylene terephthalate sheet; maintaining the tray component of the container at a temperature sufficient to crystallize the polyethylene terephthalate in the tray component; and cooling the cover component of the container to a temperature sufficient to produce polyethylene terephthalate in an amorphous state. <IMAGE> |
申请公布号 |
DE69300816(D1) |
申请公布日期 |
1995.12.21 |
申请号 |
DE1993600816 |
申请日期 |
1993.08.19 |
申请人 |
WELEX INC., BLUE BELL, PA., US |
发明人 |
NISSEL, FRANK R., AMBLER, PENNSYLVANIA 19002, US |
分类号 |
A47J27/088;B29C51/00;B29D22/00;B65D81/34;(IPC1-7):B65D81/34;B29C47/04 |
主分类号 |
A47J27/088 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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