US3786967A - Pressure relief system for an aerosol container - Google Patents

Pressure relief system for an aerosol container Download PDF

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Publication number
US3786967A
US3786967A US00261126A US26112672A US3786967A US 3786967 A US3786967 A US 3786967A US 00261126 A US00261126 A US 00261126A US 26112672 A US26112672 A US 26112672A US 3786967 A US3786967 A US 3786967A
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US
United States
Prior art keywords
container
dome
internal pressure
metal
end member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00261126A
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English (en)
Inventor
J Giocomo
H Grosso
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rexam Beverage Can Co
Original Assignee
American Can Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by American Can Co filed Critical American Can Co
Priority to US00261126A priority Critical patent/US3786967A/en
Application granted granted Critical
Publication of US3786967A publication Critical patent/US3786967A/en
Assigned to AMERICAN CAN PACKAGING INC. reassignment AMERICAN CAN PACKAGING INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AMERICAN CAN COMPANY, A NJ CORP.
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)
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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 for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant
    • B65D83/38—Details of the container body
    • 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 for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant
    • B65D83/70—Pressure relief devices

Definitions

  • the container has a safety venting system therein, whereby the product may be vented from a filled pressurized container through the system when an increase in internal pressure threatens to blow an end off the container.
  • the venting system comprises a plurality of scores formed in the upper seam where the container body is jointed to the dome closure of the container.
  • the present invention relates generally to a metal aerosol container having a pressure relief system whereby the internal contents of the container may be vented therefrom when the internal pressure rises sufficiently to a level threatening blowing an end off the container. More particularly this invention relates to a two or three piece metal aerosol container having a simple venting system to eliminate explosion of a filled aerosol container when the internal pressure rises considerably, which may be encountered during excessive heating of the container.
  • pressurized aerosol containers have been marketed to the general public. These containers usually comprise a three piece metal container having therein a product to be dispensed, together with a propellant that provides the internal pressure necessary to dispense the product through a valve mounted on the container. Products such as foods, cosmetics, insecticides, etc. have been packaged in these types of containers with considerable success.
  • the new safety feature described in this invention will protect against can failures in the packing and marketing of aerosol cans. If excessive internal pressure develops in a filled can due to an unusual situation, the safety feature would activate rapidly and provide adequate venting to completely vent the container contents before bottom end blow ofi could occur.
  • Full cans will vent if excessive pressure develops in the can due to misuse. This might involve placing the can on a hot stove or radiator, near a hot iron, or in the glove box, trunk, or window of a car sitting out in the sun.
  • partially tilled cans will also vent under the conditions mentioned above; however, near-empty cans may fail at the side seam in typical three piece metal cans before the pressure required to activate the safety feature is generated under prolonged exposure to intense heat.
  • Aerosol cans which are considered empty or nearly empty usually contain a small amount of residual product and propellant. These small amounts are sometimes not sufficient to generate the pressure needed to activate the safety feature when the can is incinerated. Under the intense heat of incineration, some of these cans will vent or rupture at the side seam. This is due to the fact that the side seam is adhered with a solder or relatively low temperature material. The side seam rupture will occur at pressures below the pressure required to buckle the dome and thus before activation of the safety venting feature. This failure, although dangerous, is less violent than blow-off of the bottom end.
  • the instant aerosol pressure relief system effectively vents excess internal pressure in all filled cans before the bursting point is reached. Under conditions of intense heat, as in incinerators, empty or near empty cans may fail, but the intensity of the failure is dramatically reduced.
  • a pressure relief system for an aerosol container forming the present invention comprises a tubular metal container adapted to hold a pressurized product that is dispensed through a valve mounted on the container.
  • the container has a safety venting system therein, whereby the product may be vented from a filled pressurized container through the system where an increase in internal pressure threatens to cause bottom end blow-off.
  • the container comprises a tubular metal body having a closure seamed to one end and the opposite end has a metal dome seamed thereto, the dome being adapted to receive a valve to close the container.
  • a plurality of scores are formed in the periphery of the dome.
  • the scores penetrate only partially through the metal of the dome at the seam which forms a hermetic seal with the container body.
  • the internal pressure within the sealed container increases and threatens to cause the container bottom end to blow-off the periphery of the dome buckles outwardly, causing the residual of the scores to fracture and produce a plurality of vents to permit the highly pressurized contents of the sealed container to safely escape and thus prevent bottom end failure.
  • FIG. 4 is an enlarged sectional view taken substantially along the line 44 in FIG. 3;
  • FIG. 5 is an enlarged fragmentary sectional view of the double seam formed by the periphery of the dome and the top of the container body;
  • FIG. 6 is an enlarged fragmentary side elevational view of the seam shown in FIG. 5 more fully illustrating a vent score
  • FIG. 7 is an enlarged partial sectional view similar to FIG. 5 but illustrating the vent score on the interior of the periphery of the dome;
  • FIG. 8 is an enlarged fragmentary sectional view illustrating the periphery of the dome after high internal pressure has buckled the dome and fractured the vent score to form a safety pressure relief vent;
  • FIG. 9 is an enlarged fragmentary side elevational view illustrating the ruptured score safety vent after buckling of the dome.
  • FIGS. 1 and 2 show a container, generally designated 12, comprising a tubular metal body 14 having a side seam 15.
  • the side seam is generally sealed with solder, as is well known in the art, although it may also be welded.
  • Closing the bottom of the container is an end 16 hermetically seamed to the bottom of the body 14 by a seam 18.
  • a dome 20 is seamed to the top of the body 12 by a double seam 22.
  • the upper end of the dome has an orifice 23 defined by a top curl 24.
  • a valve cup is placed into the orifice 23 and a suitable dispensing valve, also not shown, is positioned within the valve cup to seal the container 12 and to permit dispensing of the product and propellant from the container 12.
  • a plurality of radial scores 26 are formed in the periphery of the dome in the top of the double seam 22. As may be better seen in FIGS. 3-6 the scores 26 are narrow grooves formed in the periphery of the dome 20 and penetrate only partially through the metal of the dome 20. For example, a score 26 has a depth of approximately 0.0l0 inch for a total metal thickness of 0.015 inch leaving a solid metal residual 30 of 0.005
  • the developed length of the score is approxi-' mately 0.125 inch.
  • the angle of the score 26 is approximately 90 and it is desireable that this angle not be below.
  • the bottom 28 of the score 26 has a radius and is rounded in cross sectional appearance. This provides greater integrity and prevents premature cracking through the residual 30 of the material which would result in leakage of product and propellant from the container 12.
  • the dome 20 has a countersink 32 comprising a portion of the double seam 22 and countersink radius 34 adjacent the seam area connecting the top of the body 14 with the dome 20.
  • the top of the body 14 terminates in a flange 36 which fits within a curl 38 which forms the peripheral edge of the dome 20.
  • the flange 36 is interfolded with the curl 38 to hermetically seal and close the container 12 as the double seam 22 is formed.
  • a small amount of sealing compound 40 is positioned along the interior wall of the curl 38 to provide a hermetic seal in forming the double seam 22.
  • a similar type of double seam may be used to form the seam 18 at the bottom of the container l2.
  • a plurality of radial scores 42 are formed on the interior of the periphery of the dome 20.
  • the score is hidden by being entirely within the double seam 22.
  • this has aesthetic advantages in that the multiplicity of scores 42 are not seen by the user as are the exterior scores 26. However, either will function in the manner described hereinafter to provide a pressure relief system for a filled container 12.
  • the relief concept must allow function of the container under controllable use conditions in violation of precautionary labelling so long as the temperature does not exceed that temperature that could result in rupture of the container.
  • a secondary type of failure encountered when internal pressure increases over the maximum allowable by the container construction is a side seam rupture which generally results from exposure to high temperatures.
  • the side seam failure is dependent upon exposure temperature, the position of the container with respect to the heat source, the type of product and propellant packed in the container, the quantity of product and propellant remaining in the container, and the container size.
  • the relief concept For a container of average size such as those of 3 inches in diameter and approximately 7 9/16 height, it has been found that the relief concept must be capable of releasing 14 cubic feet per minute of internal gas at 200 psig. Less release capacity is required for smaller containers and vent capacity is strictly dependent upon volumetric capacity.
  • a single venting means is not adequate due to the fact that the top dome does not vent rapidly enough. Instead the pressure within the container will continue to increase rapidly until it exceeds the strength of the container construction. When this point is reached the container can fail in an uncontrolled manner. In such instances, an explosion could occur and failure could occur in either the top, bottom or side seam.
  • a number of radial scores have been formed in the double seam 22. This is to insure that no matter where the dome 20 begins buckling due to increased internal pressure, a vent 44 will be formed almost immediately and as the buckling continues about the periphery of the dome 20 additional vents 44 will form about the periphery of the dome 20- as additional radial scores 26 are deformed and fractured.
  • a metal container adapted to hold a pressurized product that is dispensed through a valve mounted on said container, said container having a safety venting system therein whereby the contained product is vented from the container through said system when an increase in internal pressure threatens to cause rupture of said container, comprising:
  • a metal, domed end member attached to the opposite end by a double seam having a countersink segment, said countersink segment having a straight line portion, and said domed end member being adapted to receive said valve to close said container;
  • score lines in a peripheral portion of said domed end member, said score lines being in at least a part of the straight line portion of the countersink segment and extending to at least the midpoint of the top portion of the double seam and is formed by a separate end double seamed to the metal body.

Landscapes

  • 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)
  • Nozzles (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
US00261126A 1970-09-25 1972-06-08 Pressure relief system for an aerosol container Expired - Lifetime US3786967A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US00261126A US3786967A (en) 1970-09-25 1972-06-08 Pressure relief system for an aerosol container

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US7547070A 1970-09-25 1970-09-25
US00261126A US3786967A (en) 1970-09-25 1972-06-08 Pressure relief system for an aerosol container

Publications (1)

Publication Number Publication Date
US3786967A true US3786967A (en) 1974-01-22

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ID=22125971

Family Applications (1)

Application Number Title Priority Date Filing Date
US00261126A Expired - Lifetime US3786967A (en) 1970-09-25 1972-06-08 Pressure relief system for an aerosol container

Country Status (7)

Country Link
US (1) US3786967A (enrdf_load_stackoverflow)
JP (1) JPS5131606B1 (enrdf_load_stackoverflow)
AU (1) AU459433B2 (enrdf_load_stackoverflow)
CA (1) CA957626A (enrdf_load_stackoverflow)
DE (1) DE2125968A1 (enrdf_load_stackoverflow)
DO (1) DOP1971001869A (enrdf_load_stackoverflow)
GB (1) GB1325964A (enrdf_load_stackoverflow)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3850339A (en) * 1973-05-07 1974-11-26 American Can Co Triple score pressure relief system for an aerosol container
US3912130A (en) * 1974-08-16 1975-10-14 Continental Can Co Pressure release mechanism
US3918378A (en) * 1972-08-18 1975-11-11 Aluminum Co Of America Container closure with vent opening means and method of forming the same
US4433791A (en) 1980-07-16 1984-02-28 Sexton Can Company, Inc. Pressure relief device for internally pressurized fluid container
US4513874A (en) * 1980-07-16 1985-04-30 Sexton Can Company, Inc. Pressure relief device for internally pressurized fluid container
US4580690A (en) * 1985-04-11 1986-04-08 Sexton Can Company, Inc. Coinless pressure relief device
US4993602A (en) * 1989-06-07 1991-02-19 Prd, Inc. Pressure relief device for a pressurized container
US5121858A (en) * 1990-09-07 1992-06-16 Chong Wun C Pressure relief system
US5249701A (en) * 1992-05-15 1993-10-05 Ray J. Van Thyne Aerosol container with pressure release structure
USD364339S (en) 1994-09-22 1995-11-21 The Gillette Company Aerosol dispenser
WO2006016679A1 (ja) 2004-08-10 2006-02-16 Daiwa Can Company 缶容器
US20060043122A1 (en) * 2004-08-24 2006-03-02 Ferreira Mark A Pressure relief device for aerosol can
US20190135530A1 (en) * 2017-11-06 2019-05-09 The Procter & Gamble Company Aerosol dispenser with vented valve cup and valve cup therefor
US10836561B2 (en) * 2018-10-08 2020-11-17 The Procter & Gamble Company Aerosol dispenser
US10843864B2 (en) 2017-05-17 2020-11-24 Ball Metalpack, Llc Metallic container dome configured to deform at a predetermined pressure
US10961043B1 (en) * 2020-03-05 2021-03-30 The Procter & Gamble Company Aerosol container with spaced sealing beads

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51122599U (enrdf_load_stackoverflow) * 1975-03-25 1976-10-04

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2795350A (en) * 1953-12-02 1957-06-11 Dev Res Inc Explosion-proof low-pressure containers
US3029987A (en) * 1959-09-28 1962-04-17 Container Corp Spout with frangible diaphragm for caulking cartridge
US3029981A (en) * 1959-05-28 1962-04-17 Otto Bernz Co Inc Container construction for pressurized fluids
US3074602A (en) * 1958-11-26 1963-01-22 Shillady Marion Charlton Pressure relief devices for pressure vessels and methods of making the same
US3227304A (en) * 1964-09-08 1966-01-04 Charles T Ashury Can opening arrangement
US3292826A (en) * 1965-01-18 1966-12-20 Abplanalp Robert Henry Aerosol can protected against explosion
US3450305A (en) * 1966-10-12 1969-06-17 Continental Can Co Venting means for containers
US3477614A (en) * 1968-01-25 1969-11-11 Nat Dairy Prod Corp Dispenser
US3519171A (en) * 1968-04-26 1970-07-07 Continental Can Co Dispensing container with metering and time delay valve mechanism
US3680743A (en) * 1970-04-10 1972-08-01 Cornell Aeronautical Labor Inc Safety venting apparatus combined with an aerosol container

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3283960A (en) * 1965-01-19 1966-11-08 Scovill Manufacturing Co Safety discharge means

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2795350A (en) * 1953-12-02 1957-06-11 Dev Res Inc Explosion-proof low-pressure containers
US3074602A (en) * 1958-11-26 1963-01-22 Shillady Marion Charlton Pressure relief devices for pressure vessels and methods of making the same
US3029981A (en) * 1959-05-28 1962-04-17 Otto Bernz Co Inc Container construction for pressurized fluids
US3029987A (en) * 1959-09-28 1962-04-17 Container Corp Spout with frangible diaphragm for caulking cartridge
US3227304A (en) * 1964-09-08 1966-01-04 Charles T Ashury Can opening arrangement
US3292826A (en) * 1965-01-18 1966-12-20 Abplanalp Robert Henry Aerosol can protected against explosion
US3450305A (en) * 1966-10-12 1969-06-17 Continental Can Co Venting means for containers
US3477614A (en) * 1968-01-25 1969-11-11 Nat Dairy Prod Corp Dispenser
US3519171A (en) * 1968-04-26 1970-07-07 Continental Can Co Dispensing container with metering and time delay valve mechanism
US3680743A (en) * 1970-04-10 1972-08-01 Cornell Aeronautical Labor Inc Safety venting apparatus combined with an aerosol container

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918378A (en) * 1972-08-18 1975-11-11 Aluminum Co Of America Container closure with vent opening means and method of forming the same
US3850339A (en) * 1973-05-07 1974-11-26 American Can Co Triple score pressure relief system for an aerosol container
US3912130A (en) * 1974-08-16 1975-10-14 Continental Can Co Pressure release mechanism
US4433791A (en) 1980-07-16 1984-02-28 Sexton Can Company, Inc. Pressure relief device for internally pressurized fluid container
US4513874A (en) * 1980-07-16 1985-04-30 Sexton Can Company, Inc. Pressure relief device for internally pressurized fluid container
US4580690A (en) * 1985-04-11 1986-04-08 Sexton Can Company, Inc. Coinless pressure relief device
US4993602A (en) * 1989-06-07 1991-02-19 Prd, Inc. Pressure relief device for a pressurized container
US5121858A (en) * 1990-09-07 1992-06-16 Chong Wun C Pressure relief system
US5249701A (en) * 1992-05-15 1993-10-05 Ray J. Van Thyne Aerosol container with pressure release structure
USD364339S (en) 1994-09-22 1995-11-21 The Gillette Company Aerosol dispenser
WO2006016679A1 (ja) 2004-08-10 2006-02-16 Daiwa Can Company 缶容器
US20060043122A1 (en) * 2004-08-24 2006-03-02 Ferreira Mark A Pressure relief device for aerosol can
US7222757B2 (en) 2004-08-24 2007-05-29 Illinois Tool Works Inc. Pressure relief device for aerosol can
US7621166B2 (en) 2004-08-24 2009-11-24 Illinois Tool Works Inc. Die components for making pressure relief devices
US10843864B2 (en) 2017-05-17 2020-11-24 Ball Metalpack, Llc Metallic container dome configured to deform at a predetermined pressure
US11511929B2 (en) 2017-05-17 2022-11-29 Ball Metalpack, Llc Metallic container dome configured to deform at a predetermined pressure
US20190135530A1 (en) * 2017-11-06 2019-05-09 The Procter & Gamble Company Aerosol dispenser with vented valve cup and valve cup therefor
US10640284B2 (en) * 2017-11-06 2020-05-05 The Procter & Gamble Company Aerosol dispenser with vented valve cup and valve cup therefor
US10836561B2 (en) * 2018-10-08 2020-11-17 The Procter & Gamble Company Aerosol dispenser
US10961043B1 (en) * 2020-03-05 2021-03-30 The Procter & Gamble Company Aerosol container with spaced sealing beads

Also Published As

Publication number Publication date
AU459433B2 (en) 1975-03-27
AU3383871A (en) 1973-03-29
DE2125968A1 (de) 1972-03-30
GB1325964A (en) 1973-08-08
CA957626A (en) 1974-11-12
DOP1971001869A (es) 1976-05-20
JPS5131606B1 (enrdf_load_stackoverflow) 1976-09-08

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Legal Events

Date Code Title Description
AS Assignment

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

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 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