US3826412A - Pressure release valves for aerosol cans - Google Patents

Pressure release valves for aerosol cans Download PDF

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Publication number
US3826412A
US3826412A US00275370A US27537072A US3826412A US 3826412 A US3826412 A US 3826412A US 00275370 A US00275370 A US 00275370A US 27537072 A US27537072 A US 27537072A US 3826412 A US3826412 A US 3826412A
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United States
Prior art keywords
area
score lines
aerosol
score
concave
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
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US00275370A
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English (en)
Inventor
R Kneusel
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.)
Crown Cork and Seal Co Inc
Original Assignee
Crown Cork and Seal Co Inc
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
Priority to BE791215A priority Critical patent/BE791215A/xx
Priority claimed from US00199929A external-priority patent/US3815534A/en
Application filed by Crown Cork and Seal Co Inc filed Critical Crown Cork and Seal Co Inc
Priority to US00275370A priority patent/US3826412A/en
Priority to ZA727255A priority patent/ZA727255B/xx
Priority to CA155,240A priority patent/CA993813A/en
Priority to DE2253446A priority patent/DE2253446A1/de
Priority to GB5109072A priority patent/GB1404995A/en
Priority to ES1972185450U priority patent/ES185450Y/es
Priority to NL7215394A priority patent/NL7215394A/xx
Priority to FR7240834A priority patent/FR2161687A5/fr
Priority to IT31794/72A priority patent/IT979662B/it
Priority to LU66496A priority patent/LU66496A1/xx
Publication of US3826412A publication Critical patent/US3826412A/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant
    • B65D83/70—Pressure relief devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/24—Making hollow objects characterised by the use of the objects high-pressure containers, e.g. boilers, bottles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • F17C13/123—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures for gas bottles, cylinders or reservoirs for tank vehicles or for railway tank wagons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0114—Shape cylindrical with interiorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/035—Orientation with substantially horizontal main axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/058—Size portable (<30 l)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0311—Closure means
    • F17C2205/0314—Closure means breakable, e.g. with burst discs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0329—Valves manually actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0332—Safety valves or pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0388—Arrangement of valves, regulators, filters
    • F17C2205/0394—Arrangement of valves, regulators, filters in direct contact with the pressure vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0388—Arrangement of valves, regulators, filters
    • F17C2205/0394—Arrangement of valves, regulators, filters in direct contact with the pressure vessel
    • F17C2205/0397—Arrangement of valves, regulators, filters in direct contact with the pressure vessel on both sides of the pressure vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/042—Reducing risk of explosion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/07—Applications for household use
    • F17C2270/0718—Aerosols

Definitions

  • Cans of the aerosol type having an internal propellant, such as Freon, are potentially dangerous. When such a container is subjected to excessive temperatures, dangerously high pressure levels are generated within the container. Under these conditions, the can bottom will evert and explode and portions of the can may be propelled at dangerously high velocities. Such conditions may occur when the can is incinerated and even during storage at high temperatures. In order to provide for the safe release of a pressure build-up within the can, a safety valve must be provided.
  • US. Pat. No. 3,292,826 Abplanalp discloses a pressure release valve formed by at least partially circumscribing a line of weakness, e.g., a score line, over a relatively large section of an aerosol can wall.
  • a line of weakness e.g., a score line
  • the line of weakness may be located at the various portions of the container but should not be located on the bottom wall since the discharge of pressure against-the surface on which a conventional can rests would, even with the Abplanalp valve, tend to displace the can from that surface and this would be objectionable.
  • the particular pressure release valves described in the above-discussed patents have a number of disadvantages.
  • the failure of the valves to release pressure build-ups within a narrow pressure range of 170 p.s.i. to 200 p.s.i. is juat one of these disadvantages.
  • the Shillady et al patent does indicate an effective range of 175 to 200 p.s.i. for the valve, such a valve is not consistently efiective in this range. The reason for this is in large part due to the small size of the Shillady scored area which requires a very small residual thickness and this small thickness results in an unreliable release of pressure.
  • the Abplanalp circular score line which is located in the cylindrical wall of the can body also requires a very small residual thickness, e.g., 0.001 inches assuming a circular score line diameter of one inch. This small residual thickness would be required since there is little or no deformation of the cylindrical wall outside the score line. However, such a small residual thickness is difficult to achieve in commercial production due to inclusions and variations in the metal thickness. The result is the unreliable release of pressure from the can.
  • the manufacturing technique which is utilized in making the pressure release valves in the Shillady et a1 patent represnts a further disadvantage.
  • the Shillady et al patent discloses the use of a tungsten inert gas shielded electric arc to score the valve cup of the aerosol can. As the Shillady et al patent cautions, this technique may result in excessive scoring so as to create a hole in the valve cup. Furthermore, this method of scoring is relatively costly and therefore not particularly suitable for the can industry where low cost high speed production is required.
  • a safety valve is located in the domed bottom wall of an'aerosol can.
  • the valve comprises a central everting area having a resistance to eversion less than that of the integral peripheral concave area surround:
  • lines which are preferably located on the exterior of the bottom may also be of the compound type.
  • the everting area of the can bottom isflat to provide a lesser resistance to eversion.
  • the everting area has a different radius of curvature than the surrounding area and is circumscribed by a line of weakness to provide a lesser resistance to eversion.
  • the everting area includes a plurality of arcuate score lines located between said linear score lines but spaced therefrom.
  • FIG. 1 is an elevational view of an aerosol can of the type embodying the invention
  • FIG. 2 is a sectional view of a domed bottom which may be double seamed to the cylindrical side wall portion of the can of FIG. 1 in accordance with one embodiment of this invention
  • FIG. 3 is a plan view of the exterior side of the can bottom shown in FIG. 2 showing the safety valve of this embodiment
  • FIG. 4 is a sectionalv view of the can bottom of FIGS. 2 and 3 after release by the valve;
  • FIG. 5 is a partial plan view of the exterior side of the can bottom of FIGS. 2 and 3 after release by the valve;
  • FIG. 6 is a sectional view of a score line taken along line 6-6 in FIG. 3;
  • FIG. 7. is a sectional view of another type of score line
  • FIG. 8 is a plan view of the exterior side of a can bottom showing a modified score line configuration
  • FIGS. 9 (a-e) depict a method of making the safety valve in the embodiment of FIGS. 1-6;
  • FIG. 10 is a plan view of the rough scoring taken along line 10-10 of FIG. 912;
  • FIG. 11 is a plan view of the fine scoring punch taken along line 11-11 in FIG. 9d;
  • FIG. 12 is a plan view of the fine scoring anviltaken along line 12-12 of FIG. 9d;
  • FIG. 13 is a sectional view of a domed bottom which may be double seamed to the cylindrical side wall portion of the can of FIG. 1 in accordance with another embodiment of this invention
  • FIG. 14 is a plan view of the exterior side of the can bottom shown in FIG. 2 showing the safety valve of this invention.
  • FIGS. 15 (a-e) depict a method of making the safety valve in the embodiment of FIGS. 13 and 14;
  • FIG. 16 is a plan view of another can bottom with another safety valve embodiment of the invention.
  • FIG. 17 is a partial sectional view of the can bottom shown in FIG. 16 taken along line 17-17',
  • FIG. 18 is a plan view of a scoring punch which may be utilized to form the safety valve shown in FIGS. 16 and 17;
  • FIG. 19 is a sectional view of the scoring punch taken along line 19-19 and shown as engaging the can bottom of FIGS. 16 and 17;
  • FIG. 20 is a sectional view of the scoring punch of FIG. 18 taken along line 20-20 and shown as engaging the can bottom of FIGS. 16 and 17.
  • FIG. 1 An aerosol can as shown in FIG. 1 comprises a side wall portion 10 and a top portion 12 receiving a valve assembly including a valve cup 14, a valve stem 16, and a nozzle 18 adapted to be pushed by a finger at a surface 20.
  • a domed bottom wall portion 22 is double seamed to the bottom edge of the side wall portion 10.
  • the aerosol can of FIG. 1 is provided with a safety valve comprising a scored flat area 24 which is centrally located in the domed bottom 22 and surrounded by outwardly concave peripheral area 26.
  • the several score lines 28 (a-h.) in the flat area 24 meet at a common point 30 to form a spoke-like design.
  • the score line pairs 28a and 28e, 28b and 28f, 28c and 28g, and 28d and 28h are located on diametrically opposite sides of the point 30.
  • the flat area 24 will evert outwardly as a result of the pressure build-up so as to rupture the bottom 22 at the point 30 thereby releasing the pressure build-up.
  • the peripheral concave area 26 of the bottom 22 does not evert. Tests have revealed that the hole at 30 is so small, as to pass only 2.3 cubic feet per minute of air at I60 p.s.i. This is insufficient to significantly move the can on a horizontal supporting surface. Also, the deformation which is shown as exaggerated is such that the can will return substantially to its undeformed position after pressure release thereby limiting product spillage by substantial closing of the hole at 30.
  • the bottom 22 will rupture at a pressure no less than 170 p.s.i. and a pressure no greater than 200 p.s.i.
  • various aspects of the score lines 28 (a-h) and the flat area 24 must be carefully controlled. For example, it has been found that a residual scoring of 0.002 to 0.005 results in pressure release in the range of 170 to 200 p.s.i.
  • a scoring depth in combination with a stepped circular indentation 25 leaving a residual thickness of 0.004 inches in the region 27 of the spokes 28 and a residual thickness of 0.003 inches in the region 29 of the spokes 28 which lies beneath the indentation 25 is preferred to achieve a release pressure of 170 to I p.s.i.
  • the diameter of the indentation 25 is 9/32 of an mc
  • a compound score line as shown in FIG. 6 is preferred;
  • the flat area 24 is first rough scored to form a line 32 having a base 34.
  • the base 34 is then fine scored to the appropriate residual thickness at the base 36 of a fine score line 38. It has been found that a width of 0.002 to 0.004 inches (preferably 0.0025 inches) at the base 36 and an angle 40 to 60 (preferably 50) between walls 40 of the lines 38 will result in score lines which will reliably release the pressure at the appropriate level.
  • the compound score line is preferred, a conventional score line shown in FIG. 7 may be utilized if the appropriate residual thickness can be achieved. Again, it has been found desirable to provide a 40 to 60 angle between the walls 42 with 50 preferred and a width of 0.002 to 0.004 inches with 0.0025 inches preferred at the base 44.
  • a very small opening is created at point 30 when the bottom 22 ruptures at the score lines 28. This is extremely important since the score lines are located at the bottom of the aerosol can and the bottom is usually used to support the can on a horizontal surface. If the rate of flow through the opening is excessive, the can will be upset or perhaps even propelled off the horizontal surface. It has been found that the spoke-like scoring on a flattened area of the aerosol can bottom will produce an opening having a limited flow rate which is not sufficient to upset the can on the horizontal surface since the expelled fluid is able to seep between the horizontal surface and a double seam of the bottom 22 at a sufficient rate to accommodate the rate of flow through the opening.
  • the six spoke configuration for the valve of FIG. 8 is similar to the eight spoke scoring configuration in FIG. 3.
  • the flattened area 24' for the sixspoke valve and the flattened area 24 of the eight-spoke valve have 3/4 inch diameters where 135 lb. T-5 steel is utilized to achieve release at 180 p.s.i.
  • the doming radius is 2.319 in. i 0.050 inches and the overall diameter of the domed bottom as measured from the interior of the double seam is approximately 2.553 inches for both embodiments so that the flat area in both embodiments has a diameter of less than one third the diameter of the bottom.
  • FIG. 9a shows a portion of a domed bottom 22a prior to flattening and scoring.
  • FIG. 9b shows an anvil 50 in combination with a punch 52 for rough scoring and simultaneously flattening the central area of the bottom 22a.
  • the bottom 22a is held between the supporting surface 54 of the anvil 50 and the scoring surface 56 on the punch 52 to form the rough scored and centrally flattened bottom 22b as shown in FIG. 90.
  • the rough scored and'flattened bottom 22b then assumes a position between the fine scoring punch 60 and an anvil 58.
  • the fine scoring surface 64 of the punch 60 closes on the bottom 22b which rests on a stepped anvil surface 62 of the anvil 58, the fine scored bottom 22c as shown in FIG. 9e is obtained.
  • FIG. 10 An eight-spoke configuration for the rough scoring surface 56 is shown in FIG. 10.
  • Flats 68 form the base 34 of the rough score lines while inclined surfaces 66 form the walls of the rough score lines.
  • An eight-spoke fine scoring surface 64 is shown in FIG. 11.
  • Flats 70 form the base 36 of the fine score line while inclined surfaces 72 form the walls 40 of the fine score lines as shown in FIG. 6.
  • FIG. 12 shows a plan view of the stepped anvil 62.
  • the central stepped area 64 of the anvil 63 permits the residual thickness of the score lines in the region 29 located beneath this stepped area to have a lesser residual thickness than the area 27 of the score lines.
  • the aerosol can of FIG. 1 is provided with a safety valve comprising a bulging or bubble-like area 124 which is centrally located in the domed bottom 22 and surrounded by an outwardly concave peripheral area 126.
  • the several score lines 128 (a-h) in the bubble-like area 124 meet at a common point to form a spoke-like design.
  • the score line pairs 128a and 128e, l28b and l28f, 128:: and 128g, and 128d and 128h are located on diametrically opposite sides of the point 130.
  • the area 124 is circumscribed by a line of weakness in the form of a circular score line 132.
  • the area 124 will evert outwardly as a result of the pressure build-up as shown in phantom in FIG. 13 so as to rupture the bottom 22 only at the point 130 thereby releasing the pressure build-up.
  • the surrounding area 126 at the bottom 22 which is more resistant to everting than the area 124 will not evert.
  • the bottom 22 will rupture at a pressure no less than 170 p.s.i. and a pressure no greater than 200 p.s.i.
  • the various aspects of the valve must be carefully controlled.
  • the residual thickness of the score lines 128 (a-h) should be 0.002 to 0.005. Actually, it has been found that a residual thickness of 0.004 inches in the region 127 of the spokes or lines 128 and a residual thickness of 0.003 inches in the region 129 of the spokes 128 which lies beneath a 9.32 diameter circular indentation 125 is preferred to achieve a pressure release of 170 to 185 p.s.i. (see also FIG. 15c)
  • the line of weakness 132 circumscribing the area 124 is achieved by scoring to a residual thickness of 0.010 inches.
  • the score line 132 has a greater residual thickness than the score lines 128 (a-h) although this is not indicated in FIG. 150 or l5e.
  • FIGS. 13 and 14 Another critical aspect of the valve shown in FIGS. 13 and 14 involves the dimensions of the bubble-like area 124. It has been found that an overall bubble diameter of 34 inch and a bubble radius 'of one inch are particularly effective. This will leave an overall bubbleheight of approximately I/ l 6 inch. The foregoing specifications apply to a bottom 22 of lb. T-5 steel (0.015 inches thick). The doming radius is again 2.319 inch 0.050 inches and the overall diameter of the domed bottom as measured from the interior of the double-seam is approximately 2.553 inches.
  • FIG. 15a shows a portion of a domed bottom 122a before scoring.
  • FIG. 15b shows a flattening and scoring punch 152 having a scoring surface 153 in combination with an anvil having a stepped supporting surface 151 for scoring the bottom 122a to form score lines 128 a-h, 130 and 132 as shown in FIG. 15c.
  • the bottom 1220 is placed between a doming die 156 and an anvil 154 to form the bulging having a 0.750 inch diameter is scored on the exterior of the domed can bottom 222 so as to form five substantially linear score lines 226 which extend radially outwardly from a centrally located point 228.
  • the flat area 224 is also scored so as to form a plurality of arcuate score lines 230 located radially outwardly from the centrally located point 228 in a broken circular array.
  • each of the arcuate score lines 230 is located between an adjacent pair of linear score lines 226 at the radial outward extremities of the linear score lines. It will also be seen that the ends 232 of each arcuate score line 230 are spaced a substantial distance from the adjacent linear score lines 226 as contrasted with the embodiment shown in FIG. 14 wherein the continuous circular score line 132 is joined with radially extending score lines 128 (a-h). v
  • FIGS. 18-20 A scoring punch configuration which may be utilized to form the-valve of FIGS. 16 and 17 is shown in FIGS. 18-20.
  • the fine scoring surface whichmay besubstituted for the surface 64in FIG. 9d comprises flats 232 to form the base 234 of the score lines while inclined surfaces 236 form the walls 238.
  • the central area of the score line may be provided with a 0.003 inch residual thickness while the residual thickness of the remainder of the score line ranges from 0.005 to 0.006 inches.
  • the scoring provides flat area 224 with. a fliplike action at pressures .in the range of 172 to 200 p.s.i. This in turn will rupture the linear score line 226 within the 9/32 inch diameter.
  • An aerosol can comprising a side wall portion, a top portion adapted to receive a valve assembly including a valve cup, and a steel bottom portion, said bottom portion having a peripheral concave area, a centrally located substantially flat area connected to and integrally formed therewith and substantially less resistant to internal deforming pressures than said peripheral concave area, and a pressure release valve formed by a plurality of intersecting score lines located on said flat area, said flat area deforming outwardly at a pressure in excess of 170 p.s.i., but below 200 psi.
  • score lines include pairs of lines located on diametrically opposite sides of a point on said flat area.
  • each said score line is a compound score line including a rough score line and a finished score line within said rough score line, said bottom portion having a residual thickness of 0.002 to 0.005 inches at the base of said fine score line.
  • each of said score lines has a lesser residual thickness near the center of the flat area than at the edge of the flat area.
  • the aerosol can of claim 2 comprising a series of arcuate score lines located radially outwardly from said point of intersection in a broken circular array, each of said arcuate score lines being located between each adjacent pair of said linear score lines.
  • the aerosol can of claim 12 comprising five of said linear score lines and five of said arcuate score lines.
  • An aerosol can comprising a side wall portion, a top portion adapted to receive a valve assembly including a valve cup, and a steel bottom portion, said bottom portion having a peripheral concave area, a centrally located bubble-like area integrally formed with said peripheral concave area and substantially circumscribed by a score line, said buble-like area having a lesser radius of curvature than said peripheral concave area, and a pressure release valve formed by a plurality of intersecting score lines located within said bubble-like area, said bubble-like area everting at a pressure in excess of psi. with resulting rupturing of said bottom portion at the intersection of said score lines so as to release the contents of said can through an opening created by said rupturing.
  • score lines consist of eight equally angularly spaced score lines.
  • An aerosol can comprising a steel side wall portion, a top portion adapted to receive a valve assembly including a valve cup, and a steel domed bottom portion, said bottom portion including a steel concave peripheral area and a steel central area integral with said peripheral area and having a lesser resistance to internal deforming forces than said peripheral area, said central area having score lines intersecting in a region located substantially inwardly from said concave peripheral area, said central area deforming outwardly at a predetermined pressure while said peripheral area remains concave and substantially undeformed, said scored region rupturing at a point of intersection of said score lines after and as a result of the outward deformation of said central area without any substantial rupturing along the length of said score lines or substantial outward deformation of said peripheral area.
  • An aerosol can comprising a side wall portion, a top portion adapted to receive a valve assembly including a valve cup, and a steel bottom portion, said bottom portion having a peripheral concave area characterized by a first radius of curvature and a centrally located concave valve area characterized by a second radius of curvature different from said first radius of curvature, said concave valve area comprising a plurality of intersecting score lines everting at a pressure in excess of p.s.i. and less than 200 p.s.i. with resulting rupturing of said bottom portion at the intersection of said score lines after said everting of said concave valve area so as to release the contents of said can through an opening created by said rupturing without substantial everting of said peripheral concave area.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
US00275370A 1971-11-18 1972-07-26 Pressure release valves for aerosol cans Expired - Lifetime US3826412A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
BE791215A BE791215A (fr) 1971-11-18 Soupape de decompression pour recipients a aerosol
US00275370A US3826412A (en) 1971-11-18 1972-07-26 Pressure release valves for aerosol cans
ZA727255A ZA727255B (en) 1972-07-26 1972-10-11 Pressure release valves for aerosol cans
CA155,240A CA993813A (en) 1971-11-18 1972-10-31 Pressure release valves for aerosol cans
DE2253446A DE2253446A1 (de) 1971-11-18 1972-10-31 Aerosoldose
GB5109072A GB1404995A (en) 1971-11-18 1972-11-06 Pressure release valve for aerosol dispensing cans
ES1972185450U ES185450Y (es) 1971-11-18 1972-11-07 Valvula de descompresion para recipientes de aerosol.
NL7215394A NL7215394A (enExample) 1971-11-18 1972-11-14
FR7240834A FR2161687A5 (enExample) 1971-11-18 1972-11-17
IT31794/72A IT979662B (it) 1971-11-18 1972-11-17 Valvola di scarico della pressio ne per bombole aerosol
LU66496A LU66496A1 (enExample) 1972-07-26 1972-11-17

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US00199929A US3815534A (en) 1971-11-18 1971-11-18 Pressure release valves for aerosol cans
US00275370A US3826412A (en) 1971-11-18 1972-07-26 Pressure release valves for aerosol cans

Publications (1)

Publication Number Publication Date
US3826412A true US3826412A (en) 1974-07-30

Family

ID=26895302

Family Applications (1)

Application Number Title Priority Date Filing Date
US00275370A Expired - Lifetime US3826412A (en) 1971-11-18 1972-07-26 Pressure release valves for aerosol cans

Country Status (9)

Country Link
US (1) US3826412A (enExample)
BE (1) BE791215A (enExample)
CA (1) CA993813A (enExample)
DE (1) DE2253446A1 (enExample)
ES (1) ES185450Y (enExample)
FR (1) FR2161687A5 (enExample)
GB (1) GB1404995A (enExample)
IT (1) IT979662B (enExample)
NL (1) NL7215394A (enExample)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918610A (en) * 1974-10-23 1975-11-11 Aluminum Co Of America Safety vent for a pressure container
US4003505A (en) * 1971-06-23 1977-01-18 Aluminium Suisse S.A. Relief vent for pressurized cans
US4235347A (en) * 1978-04-21 1980-11-25 CEM Compagnie Electro-Mecanique Air-tight molded resin enclosure with a safety membrane for electric devices
DE3120375A1 (de) * 1980-07-16 1982-06-16 Sexton Can Co., Inc., 02149 Everett, Mass. Ueberdrucksicherung fuer fluessigkeits-druckbehaelter
US4433791A (en) 1980-07-16 1984-02-28 Sexton Can Company, Inc. Pressure relief device for internally pressurized fluid container
EP0084590A3 (en) * 1982-01-22 1984-03-28 Rudolf Klaschka Goblet housing for a capacitor, method of making the same and apparatus therefor
US4484691A (en) * 1975-11-03 1984-11-27 Duracell Inc. Pressure release device
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
US4588101A (en) * 1984-10-10 1986-05-13 Southern Can Company Safety vent for containers
US4610370A (en) * 1985-12-30 1986-09-09 Amoco Corporation Pressure release vent
US4669626A (en) * 1983-09-20 1987-06-02 Continental Disc Corporation Rupture disc with selectively positioned initial buckling
EP0266541A1 (en) * 1986-09-27 1988-05-11 Hitachi Maxell Ltd. Explosion-proof arrangement for a non-aqueous electrochemical cell, and method for the production thereof
US4759460A (en) * 1983-09-20 1988-07-26 Continental Disc Corporation Rupture disc system
US5121858A (en) * 1990-09-07 1992-06-16 Chong Wun C Pressure relief system
FR2675782A1 (fr) * 1991-04-29 1992-10-30 Lorraine Laminage Fond pour recipient sous pression et recipient muni d'un tel fond.
FR2709081A1 (fr) * 1993-08-17 1995-02-24 Sueur Roger Amélioration de la sécurité d'utilisation des boîtiers aérosols en aluminium.
US6286702B1 (en) * 1999-11-16 2001-09-11 Henry Buermann Pressure release safety cap
US20060043122A1 (en) * 2004-08-24 2006-03-02 Ferreira Mark A Pressure relief device for aerosol can
US20070081926A1 (en) * 2005-10-07 2007-04-12 Ibiden Co., Ltd. Holding sealer and exhaust gas processing device
US20070275294A1 (en) * 2006-05-24 2007-11-29 Stearns John C Battery can having off-center C-shaped vent
US20070275293A1 (en) * 2006-05-24 2007-11-29 Begg R Justin Battery can having vent and asymmetric welded cover
US20070275295A1 (en) * 2006-05-24 2007-11-29 Ray Robert E Battery container having cruciform vent and cover
CN110325474A (zh) * 2017-02-03 2019-10-11 普坦内大容器Ip有限公司 具有一体式通气系统的桶封闭件
US10843864B2 (en) 2017-05-17 2020-11-24 Ball Metalpack, Llc Metallic container dome configured to deform at a predetermined pressure
KR20220038930A (ko) * 2020-09-21 2022-03-29 신동기 순간 압력 저감 부재가 구성된 휴대용 부탄가스용기

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2126979B (en) * 1982-09-17 1986-04-03 Sodastream Ltd Bottles

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GB748953A (en) * 1953-05-22 1956-05-16 Distillers Co Yeast Ltd Pressure safety devices
US2951614A (en) * 1959-03-30 1960-09-06 Greene Theodore Pressure containers and improvements in safety constructions therefor
US3292826A (en) * 1965-01-18 1966-12-20 Abplanalp Robert Henry Aerosol can protected against explosion
US3356257A (en) * 1965-09-16 1967-12-05 Midwest Consultants Inc Safety plug for pressure vessels
US3388601A (en) * 1965-04-09 1968-06-18 Dresser Ind Pressure gauge safety construction
US3515308A (en) * 1967-11-28 1970-06-02 Du Pont Safety-valve for a pressure vessel
US3622051A (en) * 1970-01-13 1971-11-23 Louis Benson Aerosol can with overpressure venting and entrapping means

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB748953A (en) * 1953-05-22 1956-05-16 Distillers Co Yeast Ltd Pressure safety devices
US2951614A (en) * 1959-03-30 1960-09-06 Greene Theodore Pressure containers and improvements in safety constructions therefor
US3292826A (en) * 1965-01-18 1966-12-20 Abplanalp Robert Henry Aerosol can protected against explosion
US3388601A (en) * 1965-04-09 1968-06-18 Dresser Ind Pressure gauge safety construction
US3356257A (en) * 1965-09-16 1967-12-05 Midwest Consultants Inc Safety plug for pressure vessels
US3515308A (en) * 1967-11-28 1970-06-02 Du Pont Safety-valve for a pressure vessel
US3622051A (en) * 1970-01-13 1971-11-23 Louis Benson Aerosol can with overpressure venting and entrapping means

Cited By (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4003505A (en) * 1971-06-23 1977-01-18 Aluminium Suisse S.A. Relief vent for pressurized cans
US3918610A (en) * 1974-10-23 1975-11-11 Aluminum Co Of America Safety vent for a pressure container
US4484691A (en) * 1975-11-03 1984-11-27 Duracell Inc. Pressure release device
US4235347A (en) * 1978-04-21 1980-11-25 CEM Compagnie Electro-Mecanique Air-tight molded resin enclosure with a safety membrane for electric devices
DE3120375A1 (de) * 1980-07-16 1982-06-16 Sexton Can Co., Inc., 02149 Everett, Mass. Ueberdrucksicherung fuer fluessigkeits-druckbehaelter
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
EP0084590A3 (en) * 1982-01-22 1984-03-28 Rudolf Klaschka Goblet housing for a capacitor, method of making the same and apparatus therefor
US4759460A (en) * 1983-09-20 1988-07-26 Continental Disc Corporation Rupture disc system
US4669626A (en) * 1983-09-20 1987-06-02 Continental Disc Corporation Rupture disc with selectively positioned initial buckling
US4588101A (en) * 1984-10-10 1986-05-13 Southern Can Company Safety vent for containers
EP0177847A3 (en) * 1984-10-10 1988-03-02 Southern Can Company Improved safety vent for containers
US4580690A (en) * 1985-04-11 1986-04-08 Sexton Can Company, Inc. Coinless pressure relief device
US4610370A (en) * 1985-12-30 1986-09-09 Amoco Corporation Pressure release vent
EP0266541A1 (en) * 1986-09-27 1988-05-11 Hitachi Maxell Ltd. Explosion-proof arrangement for a non-aqueous electrochemical cell, and method for the production thereof
US4842965A (en) * 1986-09-27 1989-06-27 Hitachi Maxell, Ltd. Non aqueous electrochemical battery with explosion proof arrangement and a method of the production thereof
US5121858A (en) * 1990-09-07 1992-06-16 Chong Wun C Pressure relief system
FR2675782A1 (fr) * 1991-04-29 1992-10-30 Lorraine Laminage Fond pour recipient sous pression et recipient muni d'un tel fond.
FR2709081A1 (fr) * 1993-08-17 1995-02-24 Sueur Roger Amélioration de la sécurité d'utilisation des boîtiers aérosols en aluminium.
US6286702B1 (en) * 1999-11-16 2001-09-11 Henry Buermann Pressure release safety cap
US7222757B2 (en) 2004-08-24 2007-05-29 Illinois Tool Works Inc. Pressure relief device for aerosol can
US20060043122A1 (en) * 2004-08-24 2006-03-02 Ferreira Mark A 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
US20070081926A1 (en) * 2005-10-07 2007-04-12 Ibiden Co., Ltd. Holding sealer and exhaust gas processing device
US8475721B2 (en) * 2005-10-07 2013-07-02 Ibiden Co., Ltd. Holding sealer and exhaust gas processing device
US20070275294A1 (en) * 2006-05-24 2007-11-29 Stearns John C Battery can having off-center C-shaped vent
US20070275293A1 (en) * 2006-05-24 2007-11-29 Begg R Justin Battery can having vent and asymmetric welded cover
US20070275295A1 (en) * 2006-05-24 2007-11-29 Ray Robert E Battery container having cruciform vent and cover
US7572545B2 (en) 2006-05-24 2009-08-11 Everyready Battery Company, Inc. Battery can having vent and asymmetric welded cover
US7875376B2 (en) 2006-05-24 2011-01-25 Eveready Battery Company, Inc. Battery can having off-center C-shaped vent
US20110111271A1 (en) * 2006-05-24 2011-05-12 Eveready Battery Company, Inc. Battery Can Having Off-Center Vent
US8158280B2 (en) 2006-05-24 2012-04-17 Eveready Battery Company, Inc. Battery container having cruciform vent and cover
US8268468B2 (en) 2006-05-24 2012-09-18 Eveready Battery Company, Inc. Battery can having off-center vent
CN110325474A (zh) * 2017-02-03 2019-10-11 普坦内大容器Ip有限公司 具有一体式通气系统的桶封闭件
US20190352165A1 (en) * 2017-02-03 2019-11-21 Petainer Large Container Ip Limited Keg closure with integrated venting system
CN110494385A (zh) * 2017-02-03 2019-11-22 普坦内大容器Ip有限公司 具有附接的通气系统的桶封闭件
US11053111B2 (en) * 2017-02-03 2021-07-06 Petainer Large Container Ip Limited Keg closure with integrated venting system
US11066289B2 (en) * 2017-02-03 2021-07-20 Petainer Large Container Ip Limited Keg closure with attached venting system
CN110494385B (zh) * 2017-02-03 2021-11-23 普坦内大容器Ip有限公司 具有附接的通气系统的桶封闭件
CN110325474B (zh) * 2017-02-03 2022-05-17 普坦内大容器Ip有限公司 具有一体式通气系统的桶封闭件
US11465894B2 (en) 2017-02-03 2022-10-11 Petainer Large Container Ip Limited Keg closure housing with integrally formed features
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
KR20220038930A (ko) * 2020-09-21 2022-03-29 신동기 순간 압력 저감 부재가 구성된 휴대용 부탄가스용기
KR102406073B1 (ko) 2020-09-21 2022-06-07 신동기 순간 압력 저감 부재가 구성된 휴대용 부탄가스용기

Also Published As

Publication number Publication date
IT979662B (it) 1974-09-30
NL7215394A (enExample) 1973-05-22
CA993813A (en) 1976-07-27
BE791215A (fr) 1973-05-10
ES185450U (es) 1973-10-01
GB1404995A (en) 1975-09-03
FR2161687A5 (enExample) 1973-07-06
DE2253446A1 (de) 1973-05-24
ES185450Y (es) 1974-07-01

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