US4538758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite container
Assignee: Automated Container Corp
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Filing: 1981-10-08
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Granted: 1985-09-03
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Expires: 2001-10-08
Abstract
Abstract An improved hermetically sealed composite container formed by double-seaming a pair of compounded metal ends to extended length flanges on the opposite ends of a can body so that the compound is bonded to an inner liner on the can body to provide an effective seal. The compound material is placed in the seaming panel and curl area of the metal ends so as to provide a more extensive seal area when the metal ends are double-seamed with the extended flanges on the can body. The extended length flanges provide a considerably greater contact area between the can body inner liner and the metal ends when the metal ends are double-seamed to the can body.
Inventors
- 👤 Edwin D. Griffith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:04
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/26; B21D51/30; B65; B65D; B65D15/00; B65D15/02; B65D15/04; B65D15/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
558 words
A method of forming an improved, mechanically strong end closure on a plural ply composite container comprising the steps of providing a cylindrical can body of plural ply composite material open at both its opposite axial ends, said can body comprising an inner layer, a structural layer comprised of plural plies of kraft paper, and an outer layer of label material, said can body having a greater axial length than a standard can body of a given size container, forming a radially outwardly turned flange having a length of 0.075 inch or greater on one open end of said can body such that the inner layer, structural layer, and outer layer each extend substantially perpendicular to the outer surface of said can body and the thickness of the flange remains substantially the same throughout as that of the thickness of the remainder of the can body except at the area of juncture of said flange and said can body, positioning a layer of end lining compound on the undersurface of a pair of metal end closures, each of which includes a chuck wall, adjacent shoulder area, seaming panel and cover hook area, said end lining compound extending over said seaming panel, and at least a portion of said hook area and shoulder area, and placing one of said can end closures with the compound thereon on the flange on one open end of the can body such that said flange engages the compound on said shoulder area and said seaming panel and said chuck wall extends axially into the open end of said can body, double-seaming the can end closure and flange together into a seal between the closure and can body such that the flange of the can body extends axially with the inner liner extending along the seaming panel thereby closing the open end of the can, the lining compound forming a primary hermetic annular side seal between said seaming panel of said closure and the inner liner of the flange of said can body, and forming a radially outwardly turned flange having a length of 0.075 inch or greater on the opposite open end of the can body such that the inner layer, structural layer, and outer layer each extend substantially perpendicular to the outer surface of said can body and the thickness of the flange remains substantially the same throughout as that of the thickness of the remainder of the can body except at the area of juncture of said flange and said can body, the other of said pair of can end closures with the compound thereon being adapted for placing it on the flange on said other open end of the can body such that said flange thereon engaging the compound on said shoulder area and said seaming panel and said chuck wall extends axially into the open end of said can body, and adapted for double-seaming the can end closure and said other end flange together into a seal between the closure and can body such that said other flange of the can body extends axially with the inner liner extending along the seaming panel thereby closing the open end of the can, the lining compound forming a primary hermetic annular side seal between said seaming panel of said closure and the inner liner of the flange of said can body.
Claim 2
Independent Claim
558 words
A method of forming an improved, mechanically strong end closure on a plural ply composite container comprising the steps of providing a cylindrical can body of plural ply composite material open at both its opposite axial ends, said can body comprising an inner layer, a structural layer comprised of plural plies of kraft paper, and an outer layer of label material, said can body having a greater axial length than a standard can body of a given size container, forming a radially outwardly turned flange having a length of 0.075 inch or greater on one open end of said can body such that the inner layer, structural layer, and outer layer each extend substantially perpendicular to the outer surface of said can body and the thickness of the flange remains substantially the same throughout as that of the thickness of the remainder of the can body except at the area of juncture of said flange and said can body, positioning a layer of end lining compound on the undersurface of a pair of metal end closures, each of which includes a chuck wall, adjacent shoulder area, seaming panel and cover hook area, said end lining compound extending over said seaming panel, and at least a portion of said hook area and shoulder area, and placing one of said can end closures with the compound thereon on the flange on one open end of the can body such that said flange engages the compound on said shoulder area and said seaming panel and said chuck wall extends axially into the open end of said can body, double-seaming the can end closure and flange together into a seal between the closure and can body such that the flange of the can body extends axially with the inner liner extending along the seaming panel thereby closing the open end of the can, the lining compound forming a primary hermetic annular side seal between said seaming panel of said closure and the inner liner of the flange of said can body, and forming a radially outwardly turned flange having a length of 0.075 inch or greater on the opposite open end of the can body such that the inner layer, structural layer, and outer layer each extend substantially perpendicular to the outer surface of said can body and the thickness of the flange remains substantially the same throughout as that of the thickness of the remainder of the can body except at the area of juncture of said flange and said can body, the other of said pair of can end closures with the compound thereon being adapted for placing it on the flange on said other open end of the can body such that said flange thereon engaging the compound on said shoulder area and said seaming panel and said chuck wall extends axially into the open end of said can body, and adapted for double-seaming the can end closure and said other end flange together into a seal between the closure and can body such that said other flange of the can body extends axially with the inner liner extending along the seaming panel thereby closing the open end of the can, the lining compound forming a primary hermetic annular side seal between said seaming panel of said closure and the inner liner of the flange of said can body.
Claim 3
Dependent Claim
87 words
The method set forth in claim 1 including the step of double-seaming the can end closure and said other end flange together into a seal between the closure and can body such that said other flange of the can body extends axially with the inner liner extending along the seaming panel thereby closing the open end of the can, the lining compound forming a primary hermetic annular side seal between said seaming panel of said closure and the inner liner of the flange of said can body.
Claim 4
Independent Claim
30 words
The method set forth in claims 1 or 2 wherein the steps of forming the radially outwardly turned flanges are such that the flanges have a length of 0.075-0.090 inch.
Claim 5
Dependent Claim
275 words
A composite can construction comprising a cylindrical can body having an inner liner layer, a layer of structural material including plural layers of kraft paper, and an outer label layer, a metal end closure including a center panel, a chuck wall, and a shoulder area, annular seaming panel area and cover hook area, an annular flange at one end of said can body formed radially outwardly and having a length of 0.075 inch or greater from the outer peripheral surface of said can body and disposed such that the inner layer, structural layer and outer layer extend substantially perpendicular with said outer peripheral surface of said body and the thickness of the flange remains substantially the same throughout as that of the thickness of the remainder of the can body except at the area of juncture of said flange and said can body, and a quantity of compound on the underside surface of said metal end closure extending over the entire seaming panel area and onto the shoulder area and cover hook area thereof, said metal end closure being engageable over the annular flange with said compound disposed therebetween for encircling the open end of said can body, said closure being adapted for a mechanical double-seamed connection with said can body flange such that the flange of the can body extends axially with the inner liner extending along the seaming panel forming a primary hermetic annular side seal of the metal end closure and said can body flange in the area of said compound distribution thereby providing an improved seal on such container end and enhancing the strength of the container at said end connection.
Claim 6
Dependent Claim
275 words
A composite can construction comprising a cylindrical can body having an inner liner layer, a layer of structural material including plural layers of kraft paper, and an outer label layer, a metal end closure including a center panel, a chuck wall, and a shoulder area, annular seaming panel area and cover hook area, an annular flange at one end of said can body formed radially outwardly and having a length of 0.075 inch or greater from the outer peripheral surface of said can body and disposed such that the inner layer, structural layer and outer layer extend substantially perpendicular with said outer peripheral surface of said body and the thickness of the flange remains substantially the same throughout as that of the thickness of the remainder of the can body except at the area of juncture of said flange and said can body, and a quantity of compound on the underside surface of said metal end closure extending over the entire seaming panel area and onto the shoulder area and cover hook area thereof, said metal end closure being engageable over the annular flange with said compound disposed therebetween for encircling the open end of said can body, said closure being adapted for a mechanical double-seamed connection with said can body flange such that the flange of the can body extends axially with the inner liner extending along the seaming panel forming a primary hermetic annular side seal of the metal end closure and said can body flange in the area of said compound distribution thereby providing an improved seal on such container end and enhancing the strength of the container at said end connection.
Claim 7
Dependent Claim
204 words
The composite container of claim 4 including a second metal end closure including a center panel, a chuck wall, shoulder area, annular seaming panel area and cover hook area, a quantity of compound on the underside surface of said metal end extending over the entire seaming panel area and onto the shoulder and cover hook areas thereof, an annular flange at the other end of said can body like the opposite end flange and characterized by its outward extent from the outer peripheral surface of said can body being 0.075 inch or greater and such that the inner layer, structural layer and outer layer extend substantially perpendicular with said outer peripheral surface of said body and the thickness of the flange remains substantially the same throughout as that of the thickness of the remainder of the can body except at the area of juncture of said flange and said can body, said second metal end closure being engageable over the annular flange on the other end of the can body with said compound disposed therebetween for encircling the other open end of said can body adapted for a mechanical double-seamed connection with said can body flange at its other end of closing the container.
Claim 8
Dependent Claim
21 words
The composite can construction set forth in claims 10 or 11 wherein the annular flanges have a length of 0.075-0.090 inch.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |