US4155697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container for storing food and process and apparatus for making that container
Assignee: International Paper Co
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Filing: 1976-11-29
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Granted: 1979-05-22
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Expires: 1996-11-29
Abstract
Abstract Disclosed is a container for storing product, a process and apparatus for making that container, a process and apparatus for drawing and blow forming plastic into a paperboard outer container and a process and apparatus for heat sealing a container. The container comprises a paperboard outer container and a plastic inner container which has been drawn and blow formed into the outer container. At the mouth of the container are horizontal plastic flanges which extend about the periphery of the container at least about 1/8 inch outwardly from the plastic inner container. Vertical flanges extend downwardly at least about 1/8 inch from the horizontal flanges. After product is placed in the container, the container is sealed by a heat sealable cover. A plastic overcap may be provided which engagedly fits around the container at its top.
Inventors
- 👤 Robert L. Gordon
- 👤 George H. Naugle
- 👤 Keith A. Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:20
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/16; B29C51/162; B29C51/04; B65; B65B; B65B7/00; B65B7/16; B65B7/162; B65B7/164; B65D; B65D5/00; B65D5/42; B65D5/56; B65D5/60; B65D77/00; B65D77/04; B29C51/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
207 words
An apparatus for drawing and blow forming plastic into a paperboard outer container comprising: (a) a female mold, said female mold comprising at least three vertical walls and a bottom wall; (b) a male mandrel provided with holes in communication with a source of gas whereby gas may be directed from the interior of said mandrel into said female mold, said male mandrel and female mold being arranged and constructed so that a sheet of plastic may be drawn by said male mandrel into said female mold and thereafter the sheet of drawn plastic may be blow formed in said female mold, said male mandrel and female mold being further provided with means for forming at least one horizontal flange extending from the drawn and blow formed plastic at least about 1/8 inch and at least one vertical flange extending at least about 1/8 inch downwardly from said at least one horizontal flange, further wherein said male mandrel is conical and is provided with at least three rows of substantially aligned holes, each row of substantially aligned holes arranged and constructed so that gas may be directed substantially into an edge of said female mold defined by the intersection of two vertical walls of said female mold.
Claim 2
Independent Claim
207 words
An apparatus for drawing and blow forming plastic into a paperboard outer container comprising: (a) a female mold, said female mold comprising at least three vertical walls and a bottom wall; (b) a male mandrel provided with holes in communication with a source of gas whereby gas may be directed from the interior of said mandrel into said female mold, said male mandrel and female mold being arranged and constructed so that a sheet of plastic may be drawn by said male mandrel into said female mold and thereafter the sheet of drawn plastic may be blow formed in said female mold, said male mandrel and female mold being further provided with means for forming at least one horizontal flange extending from the drawn and blow formed plastic at least about 1/8 inch and at least one vertical flange extending at least about 1/8 inch downwardly from said at least one horizontal flange, further wherein said male mandrel is conical and is provided with at least three rows of substantially aligned holes, each row of substantially aligned holes arranged and constructed so that gas may be directed substantially into an edge of said female mold defined by the intersection of two vertical walls of said female mold.
Claim 3
Dependent Claim
30 words
The apparatus of claim 1 wherein said male mandrel and female mold include means for coacting to cut said plastic sheet after said at least one vertical flange is formed.
Claim 4
Independent Claim
215 words
An apparatus for drawing and blow forming plastic into a paperboard outer container comprising: (a) a female mold, said female mold comprising at least one vertical wall and a bottom wall; (b) a male mandrel provided with holes in communication with a source of gas whereby gas may be directed from the interior of said mandrel into said female mold, said male mandrel and female mold being arranged and constructed so that a sheet of plastic may be drawn by said male mandrel into said female mold and thereafter the sheet of drawn plastic may be blow formed in said female mold, said male mandrel and female mold being further provided with means for forming at least one horizontal flange extending from the drawn and blow formed plastic at least about 1/8 inch and at least one vertical flange extending at least about 1/8 inch downwardly from said at least one horizontal flange, further wherein said male mandrel comprises a row of substantially horizontally aligned holes arranged about the circumference of said male mandrel, said row of substantially horizontally aligned holes arranged and constructed so that gas may be directed substantially into an edge of said female mold defined by the intersection of the bottom and at least one vertical wall of the female mold.
Claim 5
Independent Claim
215 words
An apparatus for drawing and blow forming plastic into a paperboard outer container comprising: (a) a female mold, said female mold comprising at least one vertical wall and a bottom wall; (b) a male mandrel provided with holes in communication with a source of gas whereby gas may be directed from the interior of said mandrel into said female mold, said male mandrel and female mold being arranged and constructed so that a sheet of plastic may be drawn by said male mandrel into said female mold and thereafter the sheet of drawn plastic may be blow formed in said female mold, said male mandrel and female mold being further provided with means for forming at least one horizontal flange extending from the drawn and blow formed plastic at least about 1/8 inch and at least one vertical flange extending at least about 1/8 inch downwardly from said at least one horizontal flange, further wherein said male mandrel comprises a row of substantially horizontally aligned holes arranged about the circumference of said male mandrel, said row of substantially horizontally aligned holes arranged and constructed so that gas may be directed substantially into an edge of said female mold defined by the intersection of the bottom and at least one vertical wall of the female mold.
Claim 6
Dependent Claim
67 words
The apparatus of claim 3 wherein said female mold comprises at least three vertical walls, said male mandrel is conical and is provided with at least three rows of substantially aligned holes, each row of substantially aligned holes arranged and constructed so that gas may be directed substantially into an edge of said female mold defined by the intersection of two vertical walls of said female mold.
References Cited (Backward Citations)
US2891280A
Cited
US2962768A
Cited
US3081491A
Cited
US3390618A
Cited
US3555652A
Cited
US3366019A
Cited
US3770860A
Cited
US3882212A
Cited
US3995763A
Cited
US4025275A
Cited
US3955266A
Cited
US3949046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |