US3731838A - Container end wall construction - Google Patents

Container end wall construction Download PDF

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Publication number
US3731838A
US3731838A US00132518A US3731838DA US3731838A US 3731838 A US3731838 A US 3731838A US 00132518 A US00132518 A US 00132518A US 3731838D A US3731838D A US 3731838DA US 3731838 A US3731838 A US 3731838A
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Prior art keywords
end wall
container
wall
peripheral
planar portion
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Expired - Lifetime
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US00132518A
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E Gedde
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Rexam Beverage Can Co
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American Can Co
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Assigned to AMERICAN NATIONAL CAN COMPANY reassignment AMERICAN NATIONAL CAN COMPANY MERGER (SEE DOCUMENT FOR DETAILS). Assignors: AMERICAN CAN PACKAGING INC., NATIONAL CAN CORPORATION (CHANGED TO), TRAFALGAR INDUSTRIES, INC. (MERGED INTO)
Assigned to AMERICAN CAN PACKAGING INC. reassignment AMERICAN CAN PACKAGING INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AMERICAN CAN COMPANY, A NJ CORP.
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/38—Details of the container body

Definitions

  • Another object is to provide an end wall structure for pressurized containers which affords improved resistance to buckling without changing the weight or type of sheet metal used.
  • Still another object is to provide an improved container end wall which affords economies in pressure can production, especially by allowing the use of lighter weight plate while at the same time maintaining strength requirements.
  • the end wall construction of this invention comprises a generally concavely domed central panel whose periphery is an outwardly descending substantially planar portion adjoining a peripheral vertical countersink wall which merges with and terminates in a peripheral U-shaped flange for attaching the end wall to a container.
  • an end wall construction by itself, as secured to a container body as by a double seam, and as part of or integral with a container body.
  • FIG. 1 is an elevational view, partially in section, of a container embodying the present invention.
  • FIG. 2 is an enlarged sectional fragmentary view showingthe end wall of FIG. 1.
  • FIG. 1 shows a pressurized container, generally designated 10, formed of a suitable material such as sheet metal and comprising a cylindrical body 12, a convex top wall 14, a dispensing valve'l6 and a concave bottom or end wall generally designated 18.
  • the bottom wall is secured to the lower edge of body 12 by a folded seam or bead 20 in a conventional manner.
  • a pressurized container generally designated 10
  • the bottom and body are secured by other means and constructions wherein the bottom and the end wall are integral, i.e. one piece.
  • FIG. 2 shows an enlarged sectional portion of end wall 18 of FIG. 1 and clearly illustrates the improvement of this invention.
  • FIG. 2 shows end wall 18 comprised of a generally concavely domed central panel 22 having at its periphery an outwardly descending substantially planar portion 24, adjoining a peripheral substantially vertical counter-sink wall 26 which merges with and terminates in a peripheral U- shaped flange 28. for attaching the end wall to a container body.
  • Concavely domed central panel 22 has a relatively large radius of curvature R extending from a center point (not shown), and the panels concavely domed central portion blends into its peripheral outwardly descending planar portion 24 at a point or locality designated BP (Blend Point).
  • Planar portion 24 merges with countersink wall 26 at an area along an are formed by relatively small radius of curvature r.
  • Planar portion 24 is shown at an angle blending with the domed portion of the central panel 22 and merging with countersink wall 26.
  • the angle is about 40 and is formed on the one hand by one of the surfaces of planar portion 24, preferably its inner surface, tltat surface being tangent to the are formed by radius of curvature r, and on the other by a line drawn horizontally through the upper portion of vertical countersink wall 26 (shown) and extended horizontally through a corresponding portion of a countersink wall on the opposite, i.e. right, side of the end wall (not shown).
  • This horizontal line is substantially parallel to a horizontal line which could be drawn along the bottom of the U-shaped flanges of vertically standing container 10 (one flange, 28, is shown).
  • the angle could also, of course, be formed by an imaginary line extended or drawn out from a surface, preferably the inner surface, of planar portion 24 so that the line meets the horizontal line which, as aforementioned, could be drawn along the bottom of flanges 28 of container 10.
  • the angle formed by planar portion 24. and the horizontal line running from countersink wall 26 can be any angle less than but practically speaking the angle generally is from about 35 to 45 and preferably is from about 38 to 42. The most preferred and most advantageous angle is about 40.
  • the improvement of this invention resides in providing the end wall with planar portion 24 itself and in providing that portion with the aforementioned particular angle, for it is the combination of these, i.e. the planar portion and its angle, that provides the end with significantly improved resistance against buckling or bursting due to high internal pressure.
  • end walls made of 107 pound TU tinplate and having the same thickness and diameter have shown that whereas a conventional end wall having a hemispherical profile has a buckle resistance of about to 200 psi, and, whereas a commercially successful ellipsoidal or generally concavely domed end wall formed of two merging arcs such as described in US. Pat. No. 3,360,158 issued to A. J. Klein on Dec. 26, 1967, has a buckle resistance of about 260 psi, an end wall of this invention, for example, having a 45 angled planar portion, has a buckle resistance of about 360 psi.
  • angles under 90 can be employed, it has been found advantageous to use as small an angle as practicable under the circumstances. This is because larger angles protrude more deeply into the interior of the can. This reduces container capacity and requires more metal to manufacture the end.
  • the end wall construction of this invention can be manufactured with any suitable material such as for example steel, tin free steel, or aluminum. As previously seen, satisfactory results were obtained using 107 pound TU tinplate. Satisfactory results can also be obtained when aluminum is employed. For instance, tests have shown that 40 angled aluminum end walls in three piece cans having soldered side seams had buckle resistances averaging about 315 psi, and two piece drawn aluminum cans having 40 angled ends had buckle resistances of from about 265 to 280 psi. This latter example can be compared to buckle resistances of about 160 psi for presently commercially successful two piece drawn aluminum cans having ellipsoidal ends of two merging arcs as disclosed in the aforementioned U.S. Pat. Number 3,360,158.
  • An end wall for a container adapted to withstand high internal pressure comprising a generally concavely domed central panel whose periphery is an outwardly descending substantially planar portion adjoining a peripheral, vertical countersink wall which merges with and terminates in a peripheral U-shaped flange for attaching said end wall to said container.

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

Increased resistance against internal pressure in an end wall for a highly pressurized container is provided by an outwardly descending substantially planar portion at the periphery of a concavely domed central panel where the central panel meets a substantially vertical countersink wall.

Description

I United States Patent [191 [11] 3,731,838 Gedde [451 May 8, 1973 [541 CONTAINER END WALL 3,360,158 12/1967 Klein 220/66 CONSTRUCTION FOREIGN PATENTS OR APPLICATIONS [75] Inventor: Erik Gedde, Park Ridge, Ill. 289,069 3/1965 Netherlands ..220/67 [73] Assignee: American Can Company, Green- Wich, D- Primary ExaminerAllen N. Knowles [22] Filed: Apt 8, 1971 Assistant Examiner-Gene A. Church Attorney-Robert P. Auber, George P. Z ehmer and 1 PP 132,518 Leonard R. Kohan 52 us. Cl ..220/67 1571 ABSTRACT [51] IntCL ..B65d 7/42 Increased resistance against internal pressure in an [58] Field 01' Search .220/66, 67; 229/5.5 end wall for a highly pressurized Container is provided by an outwardly descending substantially planar por- {56] References cued tion at the periphery of a concavely domed central UNITED STATES PATENTS panel where the central panel meets a substantially vertical countersink wall. 3,339,793 9/1967 Gerlovich ..220/66 2,579,466 12/1951 Birkland ....220/67 X 3 Claims, 2 Drawing Figures 2,613,015 10/1952 Keating..... ....220/67 X 2,795,350 6/1957 Lapin ..220/67 X Patented May 8, 1973 3,731,838
INVENTOR.
.qmmz W CONTAINER END WALL CONSTRUCTION It is known that end walls of pressured cans, especially highly pressurized cans such as those of the aerosol type, sometimes buckle due to internal pressure.
Accordingly, it is a primary object of the present invention to provide an improved end wall structure for pressurized containers that is capable of withstanding substantially higher pressures than those which can be withstood by comparable conventional end wall structures.
Another object is to provide an end wall structure for pressurized containers which affords improved resistance to buckling without changing the weight or type of sheet metal used.
Still another object is to provide an improved container end wall which affords economies in pressure can production, especially by allowing the use of lighter weight plate while at the same time maintaining strength requirements.
This invention relates to containers adapted to withstand high pressures, and more particularly, it involves an improved end wall structure for such con-- tainers. Specifically, the end wall construction of this invention comprises a generally concavely domed central panel whose periphery is an outwardly descending substantially planar portion adjoining a peripheral vertical countersink wall which merges with and terminates in a peripheral U-shaped flange for attaching the end wall to a container. Within the purview of this invention is an end wall construction by itself, as secured to a container body as by a double seam, and as part of or integral with a container body. I
The objects and advantages of the invention will be apparent as it becomes better understood from the foliowing description which, when read in connection with the accompanying drawings, discloses a preferred embodiment of the invention.
In the drawings:
FIG. 1 is an elevational view, partially in section, of a container embodying the present invention.
FIG. 2 is an enlarged sectional fragmentary view showingthe end wall of FIG. 1.
Referring to the drawing in detail, FIG. 1 shows a pressurized container, generally designated 10, formed of a suitable material such as sheet metal and comprising a cylindrical body 12, a convex top wall 14, a dispensing valve'l6 and a concave bottom or end wall generally designated 18. The bottom wall is secured to the lower edge of body 12 by a folded seam or bead 20 in a conventional manner. Within the purview of this invention are can constructions wherein the bottom and body are secured by other means and constructions wherein the bottom and the end wall are integral, i.e. one piece.
FIG. 2 shows an enlarged sectional portion of end wall 18 of FIG. 1 and clearly illustrates the improvement of this invention. Specifically, FIG. 2 shows end wall 18 comprised of a generally concavely domed central panel 22 having at its periphery an outwardly descending substantially planar portion 24, adjoining a peripheral substantially vertical counter-sink wall 26 which merges with and terminates in a peripheral U- shaped flange 28. for attaching the end wall to a container body.
Concavely domed central panel 22 has a relatively large radius of curvature R extending from a center point (not shown), and the panels concavely domed central portion blends into its peripheral outwardly descending planar portion 24 at a point or locality designated BP (Blend Point). Planar portion 24 merges with countersink wall 26 at an area along an are formed by relatively small radius of curvature r. Planar portion 24 is shown at an angle blending with the domed portion of the central panel 22 and merging with countersink wall 26. The angle is about 40 and is formed on the one hand by one of the surfaces of planar portion 24, preferably its inner surface, tltat surface being tangent to the are formed by radius of curvature r, and on the other by a line drawn horizontally through the upper portion of vertical countersink wall 26 (shown) and extended horizontally through a corresponding portion of a countersink wall on the opposite, i.e. right, side of the end wall (not shown). This horizontal line is substantially parallel to a horizontal line which could be drawn along the bottom of the U-shaped flanges of vertically standing container 10 (one flange, 28, is shown). The angle could also, of course, be formed by an imaginary line extended or drawn out from a surface, preferably the inner surface, of planar portion 24 so that the line meets the horizontal line which, as aforementioned, could be drawn along the bottom of flanges 28 of container 10.
The angle formed by planar portion 24. and the horizontal line running from countersink wall 26 can be any angle less than but practically speaking the angle generally is from about 35 to 45 and preferably is from about 38 to 42. The most preferred and most advantageous angle is about 40.
The improvement of this invention resides in providing the end wall with planar portion 24 itself and in providing that portion with the aforementioned particular angle, for it is the combination of these, i.e. the planar portion and its angle, that provides the end with significantly improved resistance against buckling or bursting due to high internal pressure. For example, tests of end walls made of 107 pound TU tinplate and having the same thickness and diameter, have shown that whereas a conventional end wall having a hemispherical profile has a buckle resistance of about to 200 psi, and, whereas a commercially successful ellipsoidal or generally concavely domed end wall formed of two merging arcs such as described in US. Pat. No. 3,360,158 issued to A. J. Klein on Dec. 26, 1967, has a buckle resistance of about 260 psi, an end wall of this invention, for example, having a 45 angled planar portion, has a buckle resistance of about 360 psi.
The amount of buckle resistance that can be provided by the end wall of this invention varies with the angle of planar portion 24. This is seen from results of the aforementioned tests, shown in the table below:
Buckle Resistance End No. Angle (P.S.l.)
Although, as previously indicated, angles under 90 can be employed, it has been found advantageous to use as small an angle as practicable under the circumstances. This is because larger angles protrude more deeply into the interior of the can. This reduces container capacity and requires more metal to manufacture the end.
The end wall construction of this invention can be manufactured with any suitable material such as for example steel, tin free steel, or aluminum. As previously seen, satisfactory results were obtained using 107 pound TU tinplate. Satisfactory results can also be obtained when aluminum is employed. For instance, tests have shown that 40 angled aluminum end walls in three piece cans having soldered side seams had buckle resistances averaging about 315 psi, and two piece drawn aluminum cans having 40 angled ends had buckle resistances of from about 265 to 280 psi. This latter example can be compared to buckle resistances of about 160 psi for presently commercially successful two piece drawn aluminum cans having ellipsoidal ends of two merging arcs as disclosed in the aforementioned U.S. Pat. Number 3,360,158.
In the inventioned disclosed herein, there is presented an improved end wall construction which, although fabricable of a lighter weight plate material, is capable of withstanding higher pressures than withstood by comparable conventional hemispherical or ellipsoidal end wall constructions.
It is thought that the invention and many of its attendant advantages will be understood from the foregoing description, and it will be apparent that various changes may be made in the form of the end without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the hereinbefore described being merely a preferred embodiment thereof.
lclaim:
1. An end wall for a container adapted to withstand high internal pressure comprising a generally concavely domed central panel whose periphery is an outwardly descending substantially planar portion adjoining a peripheral, vertical countersink wall which merges with and terminates in a peripheral U-shaped flange for attaching said end wall to said container.
2. The end wall of claim 1 wherein said end wall is secured to a container by a double seam formed by said U-shaped flange being interfolded with a peripheral flange of said container.
3. The end wall of claim 1 wherein said end is integral with said container.

Claims (3)

1. An end wall for a container adapted to withstand high internal pressure comprising a generally concavely domed central panel whose periphery is an outwardly descending substantially planar portion adjoining a peripheral, vertical countersink wall which merges with and terminates in a peripheral U-shaped flange for attaching said end wall to said container.
2. The end wall of claim 1 wherein said end wall is secured to a container by a double seam formed by said U-shaped flange being interfolded with a peripheral flange of said container.
3. The end wall of claim 1 wherein said end is integral with said container.
US00132518A 1971-04-08 1971-04-08 Container end wall construction Expired - Lifetime US3731838A (en)

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US13251871A 1971-04-08 1971-04-08

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JP (1) JPS52256B2 (en)
AU (1) AU460176B2 (en)
CA (1) CA942213A (en)
FR (1) FR2132694B1 (en)
GB (1) GB1364559A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4809861A (en) * 1980-01-16 1989-03-07 American National Can Company Buckle resistant can end
US4892214A (en) * 1986-08-09 1990-01-09 Shiseido Company Limited Metal container and method of manufacturing the same
US4953738A (en) * 1988-02-19 1990-09-04 Stirbis James S One piece can body with domed bottom
US5061140A (en) * 1986-09-08 1991-10-29 Shiseido Company Limited Method of manufacturing a metal container
US6095332A (en) * 1996-12-20 2000-08-01 Application Des Gaz Stackable canister for fluid under pressure
US20100044399A1 (en) * 2008-08-20 2010-02-25 Ds Containers Aerosol container with pressure releif mechanism
WO2011153405A3 (en) * 2010-06-04 2012-01-26 Illinois Tool Works Inc. Pressure relief device for pressurized container

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2675782B1 (en) * 1991-04-29 1993-08-20 Lorraine Laminage BOTTOM FOR CONTAINER UNDER PRESSURE AND CONTAINER PROVIDED WITH SUCH BOTTOM.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL289069A (en) *
US2579466A (en) * 1947-07-31 1951-12-25 American Can Co Container with folded top seam
US2613015A (en) * 1948-03-29 1952-10-07 Smith Corp A O Welded tank construction
US2795350A (en) * 1953-12-02 1957-06-11 Dev Res Inc Explosion-proof low-pressure containers
US3339793A (en) * 1964-12-16 1967-09-05 Rheem Mfg Co End closures for drums and equivalent containers
US3360158A (en) * 1966-02-16 1967-12-26 American Can Co Container end wall construction

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH486369A (en) * 1969-08-29 1970-02-28 Alusuisse Aerosol can made of aluminum

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL289069A (en) *
US2579466A (en) * 1947-07-31 1951-12-25 American Can Co Container with folded top seam
US2613015A (en) * 1948-03-29 1952-10-07 Smith Corp A O Welded tank construction
US2795350A (en) * 1953-12-02 1957-06-11 Dev Res Inc Explosion-proof low-pressure containers
US3339793A (en) * 1964-12-16 1967-09-05 Rheem Mfg Co End closures for drums and equivalent containers
US3360158A (en) * 1966-02-16 1967-12-26 American Can Co Container end wall construction

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4809861A (en) * 1980-01-16 1989-03-07 American National Can Company Buckle resistant can end
US4892214A (en) * 1986-08-09 1990-01-09 Shiseido Company Limited Metal container and method of manufacturing the same
US5061140A (en) * 1986-09-08 1991-10-29 Shiseido Company Limited Method of manufacturing a metal container
US4953738A (en) * 1988-02-19 1990-09-04 Stirbis James S One piece can body with domed bottom
US6095332A (en) * 1996-12-20 2000-08-01 Application Des Gaz Stackable canister for fluid under pressure
DE19754111B4 (en) * 1996-12-20 2007-04-05 Application Des Gaz Stackable container for a pressurized fluid
US20100044399A1 (en) * 2008-08-20 2010-02-25 Ds Containers Aerosol container with pressure releif mechanism
US7971759B2 (en) * 2008-08-20 2011-07-05 Ds Containers, Inc. Aerosol container with pressure relief mechanism
WO2011153405A3 (en) * 2010-06-04 2012-01-26 Illinois Tool Works Inc. Pressure relief device for pressurized container
CN102939251A (en) * 2010-06-04 2013-02-20 伊利诺斯工具制品有限公司 Pressure relief device for pressurized container
CN102939251B (en) * 2010-06-04 2014-12-10 伊利诺斯工具制品有限公司 Pressure relief device for pressurized container
US8967411B2 (en) 2010-06-04 2015-03-03 Illinois Tool Works Inc. Pressure relief device for pressurized container

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Publication number Publication date
AU460176B2 (en) 1975-04-17
JPS52256B2 (en) 1977-01-06
FR2132694B1 (en) 1974-08-02
AU3438871A (en) 1973-04-12
GB1364559A (en) 1974-08-21
FR2132694A1 (en) 1972-11-24
CA942213A (en) 1974-02-19
JPS4835413A (en) 1973-05-24

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AS Assignment

Owner name: AMERICAN NATIONAL CAN COMPANY, STATELESS

Free format text: MERGER;ASSIGNORS:AMERICAN CAN PACKAGING INC.;TRAFALGAR INDUSTRIES, INC. (MERGED INTO);NATIONAL CAN CORPORATION (CHANGED TO);REEL/FRAME:004835/0354

Effective date: 19870430

Owner name: AMERICAN NATIONAL CAN COMPANY

Free format text: MERGER;ASSIGNORS:AMERICAN CAN PACKAGING INC.;TRAFALGAR INDUSTRIES, INC. (MERGED INTO);NATIONAL CAN CORPORATION (CHANGED TO);REEL/FRAME:004835/0354

Effective date: 19870430

Owner name: AMERICAN CAN PACKAGING INC., CONNECTICUT

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AMERICAN CAN COMPANY, A NJ CORP.;REEL/FRAME:004835/0338

Effective date: 19861107

Owner name: AMERICAN CAN PACKAGING INC., AMERICAN LANE, GREENW

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AMERICAN CAN COMPANY, A NJ CORP.;REEL/FRAME:004835/0338

Effective date: 19861107