Claims
- 1. A process for making a container especially adapted for use in storing and heating comestibles intended for final preparation in microwave ovens, consisting of essentially the steps of:
- (a) providing a tray constructed of a molded paper pulp member having a continuous inside surface defined by an upstanding sidewall tapered inwardly from an open top to a smoothly rounded corner which joins with a bottom wall, said molded pulp member comprising pulp fiber material defining a multiplicity of interstices in said member to provide said member with sufficient porosity to allow passage of gas therethrough;
- (b) placing the outer surface of the tray in contact with a support having means associated therewith for drawing a vacuum through said support;
- (c) preparing a film of heated plastic material by forcing a melt through a film-forming die, and maintaining said film in a molten condition until contact with said paper pulp member;
- (d) placing said film of heated and molten plastic material into contact with at least the periphery of the upstanding wall at the top of the tray; and
- (e) drawing a vacuum through said support means and tray to pull the molten film into uniform adherent contact with the entire continuous inside surface of the tray.
Parent Case Info
This is a continuation of application Ser. No. 156,819, filed June 5, 1980, now abandoned, which is a division of application Ser. No. 927,173, filed July 21, 1978, now abandoned.
US Referenced Citations (5)
Divisions (1)
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Number |
Date |
Country |
Parent |
927173 |
Jul 1978 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
156819 |
Jun 1980 |
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