US4057444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacture of containers, particularly for packing purposes
Assignee: Mead Corp
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Filing: 1975-09-16
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Granted: 1977-11-08
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Expires: 1995-09-16
Abstract
Abstract A container, particularly for packing purposes, a method for manufacturing it and a machine for carrying out the method are described. The container comprises a cardboard sheath, a film of a material having thermobonding characteristics innerly lining the cardboard sheath at least close to its bottom end, a plastic bottom having a peripheral rim integral with the sheath by being bonded on a margin of said film and, at its end opposite to the bottom, a flange made of the same plastic material as that which makes the bottom, said flange being made integral with said sheath by the usual thermobonding techniques.
Inventors
- 👤 Marcel G. Prot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:42
CPC Classifications
B; B65; B65D; B65D15/00; B65D15/02; B65D15/04; B65D15/08; B31; B31B; B31B2105/00; B31B2105/002; B31B2105/0022; B31B2110/00; B31B2110/30; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/108; Y10T156/12; Y10T156/13
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
179 words
A method for the manufacture of a container comprising a cardboard sheath and a plastic bottom, the method comprising the steps of: shaping the bottom by thermoforming of a plastic sheet using the sheath to provide a peripheral U-shaped rim in the plastic sheet having the same cross section as that of the sheath; making the rim integral with the sheath by bonding the rim with the lowermost portion of the inner surface of the sheath; parting the excess, on the exterior of the sheath, of plastic sheet used to make the bottom from the bottom such that the remaining plastic sheet has a downwardly extending flange juxtaposed and adjacent to the outer wall of the container sheath and a horizontally extending flange integral with the downwardly extending flange; moving relatively the remaining plastic sheet with the downwardly depending flange and the sheath to position the downwardly depending flange about the outer topmost portion of te sheath; and making the downwardly depending flange integral with the sheath by bonding the flange with the outer topmost portion of the sheath.
Claim 2
Independent Claim
179 words
A method for the manufacture of a container comprising a cardboard sheath and a plastic bottom, the method comprising the steps of: shaping the bottom by thermoforming of a plastic sheet using the sheath to provide a peripheral U-shaped rim in the plastic sheet having the same cross section as that of the sheath; making the rim integral with the sheath by bonding the rim with the lowermost portion of the inner surface of the sheath; parting the excess, on the exterior of the sheath, of plastic sheet used to make the bottom from the bottom such that the remaining plastic sheet has a downwardly extending flange juxtaposed and adjacent to the outer wall of the container sheath and a horizontally extending flange integral with the downwardly extending flange; moving relatively the remaining plastic sheet with the downwardly depending flange and the sheath to position the downwardly depending flange about the outer topmost portion of te sheath; and making the downwardly depending flange integral with the sheath by bonding the flange with the outer topmost portion of the sheath.
Claim 3
Dependent Claim
131 words
A method as claimed in claim 1, wherein the sheath includes a film of material with thermobonding characteristics lining the interior of the sheath at least close to the bottom end thereof, and a band of thermobonding means lining the external part of the sheath close to the end thereof opposite to that of the bottom, wherein said step of bonding the peripheral rim with the lowermost portion of the inner surface of the sheath comprises thermobonding on a margin of the film, wherein said step of bonding the depending flange with the outer topmost portion of the sheath comprises thermobonding of the band with the depending flange, and wherein said thermobonding means is selected from the group consisting of a band of plastic material and a band of thermosealing varnish.
Claim 4
Dependent Claim
35 words
A method as claimed in claim 1, wherein said parting step comprises causing the plastic sheet to tear substantially at the bottom of the U-shaped rim by moving the sheath relative to the plastic sheet.
Claim 5
Dependent Claim
23 words
A method as claimed in claim 1, wherein said parting step comprises removing the bridging bottom portion of the U-shaped rim by abrasion.
Claim 6
Dependent Claim
49 words
A method as clamed in claim 1, wherein said parting step comprises cutting the downwardly extending flange at the bottom of the U-shaped ring with a punch having a downwardly extending cutting edge installed between the outer surface of the sheath and the inner surface of the depending flange.
Claim 7
Dependent Claim
50 words
A method as claimed in claim 1, further including the step of applying a closing cover on the container by bonding the cover to the horizontally extending flange of the remaining plastic sheet, after said step of bonding the downwardly depending flange with the outer topmost portion of the sheath.
Claim 8
Dependent Claim
105 words
A method as claimed in claim 6, wherein the closing cover includes a depending flange corresponding in shape to the inner periphery of the topmost portion of the sheath, and further including the step of bonding the depending flange of the cover to the inner topmost portion of the sheath, and wherein said steps of bonding the closing cover to the horizontally extending flange of the plastic sheet, bonding the downwardly extending flange of the plastic sheet to the outer topmost portion of the sheath, and bonding the depending flange of the closing cover to the inner topmost portion of the sheath are realized simultaneously.
Claim 9
Independent Claim
236 words
A method for the simultaneous manufacture of a plurality of containers, each comprising a cardboard sheath and a plastic bottom, comprising: shaping the bottoms of all the containers by thermobonding of a plastic sheet using the sheaths of the containers in order to provide on each bottom a peripheral U-shaped rim in the plastic sheet having the same cross section as that of the corresponding sheath; making the rim of each bottom integral with the sheath with which it is associated by bonding the rim with the lowermost portion of the inner surface of the sheath; parting the excess, on the exterior of each sheath, of plastic sheet used to make the bottoms from the bottoms such that the remaining plastic sheet has downwardly extending flanges juxtaposed and adjacent to the respective outer walls of the contianer sheaths, and horizontally extending zones integral with the downwardly extending flanges between the recesses defined by the downwardly extending flanges; moving relatively the remaining plastic sheet with downwardly depending flanges and the sheaths to position the downwardly extending flanges of the plastic sheet about the outer topmost portions of the sheaths; and making the downwardly depending flanges integral with the respective sheaths by bonding the flanges with the respective outer topmost portions of the sheaths, so that all the containers of the plurality of containers are connected to one another through the horizontally extending zones of the plastic sheet.
Claim 10
Independent Claim
236 words
A method for the simultaneous manufacture of a plurality of containers, each comprising a cardboard sheath and a plastic bottom, comprising: shaping the bottoms of all the containers by thermobonding of a plastic sheet using the sheaths of the containers in order to provide on each bottom a peripheral U-shaped rim in the plastic sheet having the same cross section as that of the corresponding sheath; making the rim of each bottom integral with the sheath with which it is associated by bonding the rim with the lowermost portion of the inner surface of the sheath; parting the excess, on the exterior of each sheath, of plastic sheet used to make the bottoms from the bottoms such that the remaining plastic sheet has downwardly extending flanges juxtaposed and adjacent to the respective outer walls of the contianer sheaths, and horizontally extending zones integral with the downwardly extending flanges between the recesses defined by the downwardly extending flanges; moving relatively the remaining plastic sheet with downwardly depending flanges and the sheaths to position the downwardly extending flanges of the plastic sheet about the outer topmost portions of the sheaths; and making the downwardly depending flanges integral with the respective sheaths by bonding the flanges with the respective outer topmost portions of the sheaths, so that all the containers of the plurality of containers are connected to one another through the horizontally extending zones of the plastic sheet.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |