EP0228371A1 - Fermeture de bombe aerosol - Google Patents

Fermeture de bombe aerosol

Info

Publication number
EP0228371A1
EP0228371A1 EP85903614A EP85903614A EP0228371A1 EP 0228371 A1 EP0228371 A1 EP 0228371A1 EP 85903614 A EP85903614 A EP 85903614A EP 85903614 A EP85903614 A EP 85903614A EP 0228371 A1 EP0228371 A1 EP 0228371A1
Authority
EP
European Patent Office
Prior art keywords
deformations
mounting cup
improvement
gasket
thin portions
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.)
Pending
Application number
EP85903614A
Other languages
German (de)
English (en)
Inventor
Charles S. Radtke
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0228371A1 publication Critical patent/EP0228371A1/fr
Pending legal-status Critical Current

Links

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 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
    • 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
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/44—Making closures, e.g. caps
    • B21D51/46—Placing sealings or sealing material

Definitions

  • Aerosol dispensing containers have found widespread use in the packaging of fluid materials including a variety of both liquid and powdered particulate products. Such containers are provided with a valve-controlled discharge orifice and operate by the action of a volatile propellant which is confined within the container together with the product to be dispensed. Because the propellant has an appreciable vapor pressure at room temperature, the product in the closed container is maintained under super-atmospheric pressure.
  • a typical aerosol unit comprises a hollow cylindrical container which is tightly closed at one end and is provided with an opening at its opposite end for receiving a dispensing valve assembly.
  • a closure commonly referred to as a mounting cup, serves as the closure for the container and as a support for the valve assembly.
  • the mounting cup comprises a panel having an aperture for receiving the valve assembly, a skirt depending from the periphery of the panel, and an annular channel extending outwardly from the edge of the skirt.
  • mounting cup gasket seals have been formed by disposing a previously cut gasket in the channel.
  • This type of gasket has the disadvantage of not being stationary relative to the mounting cup during propellant filling or other valve unit assembly operations with the undesirable consequence that when the mounting cup and container are clinched to effect the seal, the gasket is often disposed at an angled position, and thus, the clinching operation is less effective.
  • Another commercial method for forming the gasket onto the mounting cup consists in forming the gaskets, in situ, from liquid gasket-forming compositions comprising an elastomer dispersed or dissolved in a volatile organic liquid vehicle.
  • the liquid composition is deposited in the desired configuration in the channel of the cup while the cup is rotated " beneath a metering nozzle through- which-the composition flows.
  • the deposit is then converted into a dry solid sealing mass by expelling the liquid vehicle at elevated temperatures.
  • the method of the invention of the aforesaid U. S. Serial No. 565,873 comprises passing a tubular sleeve of gasket material onto a compressible mandrel; initially positioning and aligning the skirt of the mounting cup and the contiguous end of the mandrel such that the sleeve of gaske material may pass onto the skirt, said mandrel having fixed and movable portions with respect to each other and to their movement toward and away from the mounting cup; urging the movable portion of the gasket material bearing mandrel toward the mounting cup such that the gasket material passes onto the skirt of the cup; causing the movable portion of the mandrel to retract to its initial position, cutting the sleeve at a point between the mounting cup and s UBSTITUTE SHEET the mandrel to leave a band of gasket material; and subsequently, advancing the mounting cup to a station whereat the band of the gasket material is urged further onto the skirt of the mounting cup, whereby,
  • the product of the invention of Serial No. 606,547 comprises disposing one or more compressive deformations in the band of gasket material.
  • Serial No. 606,547 discloses that a series of radial or annular deformations (ribs) may be utilized. s ' t
  • the subject invention concerns an improvement in the gasketed mounting cup of Serial No. 606,547 (referred to supra).
  • the improvement in the gasketed mounting cup of the subject invention comprises a multiplicity of radially-directed deformations in the band of gasket material contiguous to the channel portion of the mounting cup.
  • the radially directed deformations form an annular, alternating series of relatively thick and thin gasket portions.
  • the radially-directed deformations terminate within the outer edge portion of the gasket.
  • Figure 1 shows in section view a gasketed aerosol mounting cup prepared according to the method and apparatus of the invention of Serial No. 565,873.
  • Figures 2A-F is a schematic of one embodiment of the invention of Serial No. 565,873, showing the several steps utilized in positioning the gasket material onto an aerosol mounting cup.
  • Figure 3 is a perspective view of the apparatus of the embodiment of Figure 2, together with the apparatus used in a second operation novel to this invention, on the product of the embodiment of Figure 2.
  • Figure 4 is a sectional view of the apparatus of the embodiment of Figure 3, along the line 4-4 of Figure 3.
  • Figure 5 is a partial section of the apparatus used in the second operation of the product of the embodiment of Figure 2, along the line 5-5 of Figure 3.
  • Figure 6 is a timing diagram through a single cycle for producing the mounting cup according to the embodiment of Figure 2.
  • Figure 7 is a schematic showing the several operations or stations in the preferred mode for the manufacture of the gasketed mounting cup of this invention.
  • Figure 8 is a partial sectional view of the preferred apparatus used in the operation to advance the band of gasket material onto the mounting cup such that the end of the gasket material resides on the straight portion of the skirt of the mounting cup.
  • Figure 9 is a perspective view of one of the flexible fingers of the apparatus of Figure 8.
  • SU BSTITUTE SHEET Figures 10 and 11 are a plan view along the lines 1Q-10 and 11-11 of Figure 8.
  • Figure 12 is a plan view along the line 12-12 of Figure 8.
  • Figure 13 is a partial sectional view of the preferred apparatus used in the operation to advance the gasket material to its ultimate position on the mounting cup.
  • Figure 14 is a plan view of the top surface of a member of the centering mechanism of Figure 13.
  • Figure 15 is a plan view of the underside of the gasketed mounting cup of this invention.
  • Figure 16 is a sectional view of the gasketed mounting cup of Figure 15.
  • Figure 17 is a plan view of the underside of the gasket of this invention.
  • Figure 18 is a sectional view- of the gasket of Figure 17.
  • Figure 19 is an enlarged section along the line A-A of Figure 17.
  • Figure 20 is an enlarged section along the line B-B of Figure 17.
  • Figure 21 is a partial section of the plunger used to form the gasket of Figures 15-20.
  • Figure 22 is a partial section of the inner sleeve of the plunger of Figure 21.
  • Figure 23 is an enlarged view of the circled portion of Figure 22.
  • Figure 24 is a plan view of the underside of a further embodiment of the gasketed mounting cup of this invention.
  • Figure 25 is a sectional view of the gasketed mounting cup of Figure 24.
  • Figure 26 is a plan view of the underside of a further embodiment of the gasket of this invention.
  • SUB Figure 27 is a sectional view of the gasket of Figure 26.
  • Figure 28 is an enlarged view along the line A-A of Figure 26.
  • Figure 29 is an enlarged view along the line B-B of Figure 26.
  • Figure 30 is a partial section of the plunger used to form the gasket of Figures 24-29.
  • Figure 31 is a partial section of the inner sleeve of the plunger of Figure 30.
  • Figure 32 is an enlarged view of the circled portion of Figure 31.
  • FIG 1 is a sectional view of a gasketed-mounting cup shown in inverted position relative to its placement on the assembled container and produced according to the general method of Serial No. 565,873.
  • the mounting cup generally designated as 10, comprises a circular panel 12 having an integral skirt 14 depending from its periphery.
  • the free edge of skirt 14 is outwardly flanged at 16 to form an annular channel 18 for embracing the bead surrounding the container opening (not shown), when the cup is positioned thereon.
  • the inner portion of panel 12 is countersunk to form a tubular rim, generally designated as 20, which has a dependent circular wall 22 integrally joined with an apertured horizontal wall 24.
  • the rim 20 acts as a pedestal for the valve unit and the valve stem is admitted into the container through apertured wall 24.
  • the gasket 26 is disposed on the exterior surface of the skirt 14 and extends beyond the juncture of the skirt and channel and a distance into said channel.
  • a sleeve of gasket material 30 is disposed over the length of the mandrel, generally designated as 32.
  • Mounting cup 34 is securely positioned within a seat 36, which is mounted on a suitable base, in a manner known to those skilled in the art.
  • Positioning pin 38 extends through the central aperture in the pedestal of the mounting cup 34 and provides a fixed spacing between the bottom surface 40 of the mandrel 32 and the mounting cup 34.
  • Mandrel 32 has an upper portion 42 and a lower portion 44 which are retractably collapsible relative to each other (the structure of which is more fully described in Figure 4).
  • An upper and lower gripping member is provided at 46 and 48, respectively.
  • Figure 2A the initial stage of a single cycle, shows the mandrel 32 disposed atop the positioning pin 38, with the mandrel 32 having the gasket material disposed at the. initial cycle stage, i.e., terminating at the bottom surface 40 of the mandrel 32.
  • the gasket material is first disposed on the skirt of the mounting cup 34 the desired distance, and subsequently, the lower gripping member 48 engages the lower portion 44 of the mandrel 32.
  • Figure 2E shows a mounting cup with a band of the gasket material 30 on the skirt of the mounting cup.
  • Figure 3 shows a six-station gasket-mounting cup assembly.
  • the gasket material 30 is fed from individual rolls (not shown) of said material.
  • Upper gripping member 46 has a series of openings 52 which receive the mandrel 32.
  • the bottom gripping member is 48.
  • Mounting cup 34 is fed through a raceway 54 to a position beneath each of the mandrels 32. Not shown
  • the cup After the mounting cup has received the gasket material 30, the cup is moved to a station whereat a hollowed bottom plunger 58, shown in more detail in Figure 5, advances over the skirt of the mounting cup and urges the gasket material 30 along the skirt.
  • a hollowed bottom plunger 58 shown in more detail in Figure 5
  • Figure 4 shows in more detail the structure of a single mandrel-mounting cup station of the embodiment shown in Figure 3.
  • the upper portion 42 of the mandrel 32 has a tapered upper surface 60 which is threaded onto the upper portion 42, the shape of the surface 60 facilitating the passing of the gasket material onto the mandrel 32.
  • the upper portion 42 of the mandrel 32 has a cavity 62 in which is disposed a spring 64.
  • FIG. 2A-F Shown best in Figures 2A-F are the plurality of fingers * 66 which form-the-bottom end of the upper portion 42 of the mandrel 32, and the plurality of recesses 68 in lower portion 44 of the mandrel 32, and which are aligned to receive the fingers 66 when the upper portion of the mandrel 32 is moved toward the lower portion of the mandrel.
  • the upper gripping member 46 is a conventional chuck which is connected to a reciprocating ram such that it may rapidly advance and retreat from the mounting cup and when gripping the upper portion of the mandrel move said portion toward the mounting cup.
  • the lower gripping member 48 is a convention ⁇ al chuck.
  • the cutting edge 50 is mounted in a conventional manner and proscribes an elliptical path in its advance and retreat from the mounting cup 34.
  • Figure 5 shows a reciprocating plunger, the lower outer shoulder of which engages the upper edge of the gasket material and urges it further onto the skirt of the- mounting cup.
  • the plunger generally designated as 104, has a lower hollow portion 106, terminating in shoulder 108.
  • a spring-loaded centering- pin 110 Set within the lower portion 106 is a spring-loaded centering- pin 110 having the protuberance 112.
  • the protuberance 112 has the beveled terminating portion 114 which mates with and centers the mounting cup 34 by contacting the sloped panel 113 of the mounting cup.
  • the function of the plunger action shown in Figure 5 is to advance the band of gasket material onto the mounting cup such that the band resides at or below the sloped surface 113 of the mounting cup 34.
  • the purpose of so disposing the gasket band is to provide a band edge supported against the straight portion 115 of the skirt of the mounting cup 34, thereby to be properly positioned to mate with the plunger in the second and final plunger action for advancing the band of gasket material to its ultimate position on the mounting cup.
  • Figure 5 shows means for advancing the gasket material from its position on the mounting cup after
  • the advancement of the plunger and mounting cup centering of Figure 8 is through the simple action of advancing the reciprocating ram, which action is a conventional means for advancing the plunger and centering means.
  • the action of the plunger of Figure 5 is simple advancement of the plunger through movement of the reciprocating ram.
  • the plunger generally designated as 200 has an arbor 202 which is connected through conventional means to a reciprocating ram (not shown). Within the bore 204 telescoped member 206 is independently spring loaded within the bore 204. The telescoped section 206 terminates in a slotted collar portion 220. Positioned within member 206 is mounting cup centering means 208, which is independently spring loaded. Slotted collar 210 is disposed outboard of telescoped section 206, the slots of said collar 210 receiving fingers 212. The fingers 212 (shown in more detail- in - Figures 9) are affixed to the arbor 202 through dowel pins 214.
  • the slots 216 ( Figure 9) receive 0 rings 218, the purpose of the 0 rings being to provide a constant inwardly directed pressure on the fingers 212.
  • the fingers 212 are also positioned within the slots 222 ( Figure 11) of the slotted collar portion 220.
  • Affixed to the bottom of telescoped member 206 is a plate 224, said plate 224 providing a shoulder 226 against which the bottom shoulder 228 of
  • Threadedly mounted onto the slotted collar 210 is an outer adjustable sleeve member 236 which sleeve member 236 functions to prevent outward splaying of the fingers 212 and thereby to direct the bottom surface 238 of the fingers 212 against the top surface of the gasket material 230.
  • Figure 6 describes a timing cycle that is suitable for the six-station unit shown in Figure 3.
  • the clamp is the gripping member, pins the positioning pins, feed finger and feed arm are a conventional mechanism for advancing six mounting cups per cycle to be positioned to receive the gasket material.
  • the cups are passed through a heating zone to heat the gasket material.
  • heating of the gasket material may be accomplished through con ⁇ tacting of the gasket bearing metal mounting cup and the metal tracking through which the cup passes; the metal track being heated b -a-contained- heated, liquid.
  • the preferred method of heating the gasket material may be accomplished by initially heating the metal mounting cup through induction heating by passing the gasket bearing cup in the vicinity of a magnetic field and subsequently passing the cup through a heated track as described above.
  • the preferred plunger used at the secondary plunger station for effecting the radially-directed deformations of the gasketed mounting cup of this invention in the two-step advancement of gasket material to its ultimate position on the mounting cup is as shown in Figures 21-23 and 30-32.
  • a plunger mechanism which initially centers the mounting cup 242 and subsequently advances the gasket 244 to its ultimate position on the mounting cup 242.
  • the plunger mechanism 240 is attached to an arbor (not shown) which in turn is attached by conventional means to a reciprocating press (not shown).
  • the plunger mechanism has a plug member 250. which has a central bore defining a chamber 252. Affixed to the plug member 250 is inner sleeve 254, said sleeve having a flange 256 for connecting to the plug member 250.
  • Outer sleeve 258 is connected to inner sleeve 254 through flange 260.
  • SUBSTITUTE SHEET Centering mechanism is disposed within the inner sleeve 254 and the chamber 252 and comprises a spring retainer and stop 264, rod 266, piston member 268, 0 rings 270 and centering plug 272.
  • Mounting cup stripper 274 is independently spring loaded and is assembled within the inner sleeve 254 and rests on shoulder 276 of inner sleeve 254.
  • the opening 278 of the stripper 274 has a slot configuration which is shown in greater detail in Figure 14. The slot configuration prevents the centering mechanism from being removed from the plunger assembly, the edge 280 of the spring retainer and stop 264 abutting against the upper surface 282 of the stripper 274.
  • FIG. 21 The configuration of the forward advancing surface of the plunger to effect the radially-directed deformations is best shown in Figures 21-23.
  • the forward advancing surface 284 of the inner sleeve 254 comprises a multiplicity of spaced V-cuts to provide an annular pattern of alternating flats 286 and V-shaped recesses 288.
  • An enlarged detail showing of the flats 286 and V-shaped recesses 288 in the plunger surface 284 is shown in Figure 23.
  • the gasket generally designated as 300, is shown seated in the mounting cup 302. Note that the deformations 304 terminate short of the peripheral edge 306 of the gasket.
  • the annular deformation comprises a series of eighty (80) alternating thin and thick portions of gasket material. This is the preferred configuration. It is believed that the minimum number of thin and thick portions to effectively positionally stabilize the gasket is forty (40).
  • annular radially-directed deformation of thin and thick portions be evenly spaced and of equal width, as shown in the drawings.
  • the raised compressible portion of the gasket (high spots), best shown in Figure 19, act as a series of springs urging the mounting cup away from the annular clinching contact between the mounting cup and container bead (clinching between container and mounting cup not shown but standard practice is to outwardly swage the skirt of the cup against the inner surface of the container bead) thereby effecting an improved seal between cup and container.
  • a bead 400 is formed on the perimeter of the gasket 402.
  • the bead 400 may be formed by using a forward advancing plunger surface configured with a recess 404 in the outer plunger sleeve 406, as shown in Figure 30. With a gasket thickness of .014", a recess 404 of .050" has been found satisfactory.
  • the centering mechanism 262 is advanced toward the mounting cup by passing air under pressure into the chamber 252, said advancement occurring at the initial phase of the downward stroke of the reciprocating press.
  • the air passes through the slot of the stripper 274 and generates a pressure against the piston 268 which overcomes the retracting pressure of the spring 287 and advances the centering mechanism against the mounting cup.
  • the centering mechanism is retracted by closing off the air supply and allowing the spring to return the mechanism to its retracted position. .
  • the plunger sleeves continue their advance and shoulder 290 engages the gasket and urges the gasket further onto the mounting cup.
  • the inner and outer sleeves ultimately bottom in the channel of the mounting cup.
  • the inner sleeve effects a compressive force against the plastic gasket material and the gasket is deformed in the pattern of the forward advancing surface 284, thereby permanently deforming the surface of the gasket.
  • the sleeves are retracted while retaining the stripper in contact with the mounting cup through - its independent spring means for a portion of the retraction cycle, namely, until the inner sleeve clears the mounting cup.
  • the mounting cups are promptly preferably cooled to about 40°F.
  • the inside diameter of the sleeve of the gasket material is slightly less than the outside diameter of the skirt portion of the mounting cup.
  • the so-called one-inch aerosol mounting cups have a skirt diameter of ".980-.990". It has been found that •gasket material having a thickness of .014 is satisfactory. To accommodate this thickness of gasket, mounting cups having a skirt diameter of .950 inches have been used. Gasket bands having a width of 9/32" have been satisfactorily employed.
  • plastic gasket material having sufficient resiliency may be used, provided there is compatability between the container contents and the plastic material, it has been found that a plastic comprising low density polyethylene (density range of .916-.922) having 5-15% polyisobutylene in the molecular- weight range of 40,000-200,000, plus stabilizers usually used with polyethylene in the environment in which the gasket material will reside, provides a satisfactory gasket material over a broad product range.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Gasket Seals (AREA)
  • Closures For Containers (AREA)

Abstract

Une gorge de montage (302) à joint d'étanchéité amélioré pour une bombe aérosol présente une déformation radiale (304) dans la partie canal du joint d'étanchéité (300) qui stabilise la position du joint d'étanchéité par rapport à la disposition dudit joint d'étanchéité sur la gorge de montage.
EP85903614A 1984-07-02 1985-07-10 Fermeture de bombe aerosol Pending EP0228371A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US62535884A 1984-07-02 1984-07-02
PCT/US1985/001290 WO1987000148A1 (fr) 1984-07-02 1985-07-10 Fermeture de bombe aerosol

Publications (1)

Publication Number Publication Date
EP0228371A1 true EP0228371A1 (fr) 1987-07-15

Family

ID=26771910

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85903614A Pending EP0228371A1 (fr) 1984-07-02 1985-07-10 Fermeture de bombe aerosol

Country Status (7)

Country Link
EP (1) EP0228371A1 (fr)
CH (1) CH662797A5 (fr)
ES (1) ES295932Y (fr)
NZ (1) NZ212607A (fr)
PT (1) PT80754B (fr)
WO (1) WO1987000148A1 (fr)
ZA (1) ZA854981B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2208308A (en) * 1987-07-21 1989-03-22 Precision Valve Corp Mounting cup for aerosol containers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US981524A (en) * 1909-05-12 1911-01-10 Empire Rubber Mfg Company Rubber fabric.
GB440923A (en) * 1934-03-27 1936-01-08 Marcel Aubert Improvements in joint-making packing
US3312376A (en) * 1965-07-02 1967-04-04 Niagara Plastics Co Inc Dispensing container with a venting washer
US4091961A (en) * 1976-06-21 1978-05-30 Greif Bros. Corporation Chime protective gasket
IN154639B (fr) * 1980-02-01 1984-11-24 Abplanalp Robert H

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8700148A1 *

Also Published As

Publication number Publication date
NZ212607A (en) 1988-01-08
WO1987000148A1 (fr) 1987-01-15
ZA854981B (en) 1986-02-26
PT80754B (en) 1986-11-20
PT80754A (en) 1986-01-20
CH662797A5 (en) 1987-10-30
ES295932Y (es) 1988-01-01
ES295932U (es) 1987-07-01

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