CA1207717A - Valve mounting assembly for aerosol containers and the like - Google Patents
Valve mounting assembly for aerosol containers and the likeInfo
- Publication number
- CA1207717A CA1207717A CA000420068A CA420068A CA1207717A CA 1207717 A CA1207717 A CA 1207717A CA 000420068 A CA000420068 A CA 000420068A CA 420068 A CA420068 A CA 420068A CA 1207717 A CA1207717 A CA 1207717A
- Authority
- CA
- Canada
- Prior art keywords
- gasket
- chamber
- annular
- cup
- channel
- 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
Links
- 239000000443 aerosol Substances 0.000 title abstract description 7
- 238000000034 method Methods 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 7
- 230000004308 accommodation Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 abstract description 6
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 18
- 239000004698 Polyethylene Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- -1 polyethYlene Polymers 0.000 description 5
- 229920000573 polyethylene Polymers 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 230000008961 swelling Effects 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 229940093470 ethylene Drugs 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- 101100346656 Drosophila melanogaster strat gene Proteins 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 101100227721 Rattus norvegicus Frk gene Proteins 0.000 description 1
- 101100271221 Schizosaccharomyces pombe (strain 972 / ATCC 24843) abo1 gene Proteins 0.000 description 1
- 241000193803 Therea Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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
- B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
- B21D51/2653—Methods or machines for closing cans by applying caps or bottoms
- B21D51/2661—Sealing or closing means therefor
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)
Abstract
Title: VALVE MOUNTING ASSEMBLY FOR AEROSOL
CONTAINERS AND THE LIKE
Inventor. Werner A. Radtke Joseph L. Roe ABSTRACT OF THE DISCLOSURE
In the formation of a valve mounting assembly for aerosol containers and the like, an aerosol valve mounting cup including a projecting central cylindrical body with an outwardly directed annular channel about the end thereof, an annular planar gasket deformably receivable within the chan-nel, and apparatus for positioning the gasket in the channel.
The inner periphery of the gasket defines a diameter sub-stantially less than that of the cylindrical body whereby forceable engagement of the gasket about the body and into the channel outwardly deforms the inner peripheral portion of the gasket into a sleeve-like configuration intimately en-gaged with the cylindrical body thereabout, the remainder of the gasket seating within and conforming to the annular channel. Engagement of the gasket into the channel utilizes a gasket receiving bushing with a longitudinally moveable inserter therein which forces the gasket into the channel as the apparatus moves over a mounting clip.
CONTAINERS AND THE LIKE
Inventor. Werner A. Radtke Joseph L. Roe ABSTRACT OF THE DISCLOSURE
In the formation of a valve mounting assembly for aerosol containers and the like, an aerosol valve mounting cup including a projecting central cylindrical body with an outwardly directed annular channel about the end thereof, an annular planar gasket deformably receivable within the chan-nel, and apparatus for positioning the gasket in the channel.
The inner periphery of the gasket defines a diameter sub-stantially less than that of the cylindrical body whereby forceable engagement of the gasket about the body and into the channel outwardly deforms the inner peripheral portion of the gasket into a sleeve-like configuration intimately en-gaged with the cylindrical body thereabout, the remainder of the gasket seating within and conforming to the annular channel. Engagement of the gasket into the channel utilizes a gasket receiving bushing with a longitudinally moveable inserter therein which forces the gasket into the channel as the apparatus moves over a mounting clip.
Description
'1 7~7 lBACKGROUND OF THE INVENTIOM
IIn aerosol containers and the like, the dispensing valve is normally mounted to the container through the use of ¦ a valve mounting assembly comprising a mounting cup and an associated,gasket, The mounting assemblY includes a gasket receiving channel which is positioned over and clinched to the rolled rim of the rontainer about the upper end thereof.
The mounting cup is typically clinched to the upper part of the container by a device whlch displaces radiall~ outwar~lY
the cylindrical wall of the mounting cup.
: ~ ~ Much effort has been directed to the provision o~ the gasket or gasket seal within the cup to ensure a positive sealing of the cup to the container in a manner which mini-mizes loss of the pressurized contents.
In its simplest iorm, the gasket can comprise a con-ventional ~lat rubber washer or annular gasket which is loosely received abo1~t the central body of the cup and sits -freely within the channel. Such gaskets are relativel~ e~-pensive and could, due to the relatively loose reception within the mounting cup, be displaced during the handling o~
the mounting assembly prior to and during the ~inal secure-ment to the container. Such gaskets are especiall~ suscept-ible o~ movement during the propellant ~illing operatlon and during valve assembly9 impairing the clinching operation~ In addition, pre-cut gaskets generally reside onl~ in the receiv-
IIn aerosol containers and the like, the dispensing valve is normally mounted to the container through the use of ¦ a valve mounting assembly comprising a mounting cup and an associated,gasket, The mounting assemblY includes a gasket receiving channel which is positioned over and clinched to the rolled rim of the rontainer about the upper end thereof.
The mounting cup is typically clinched to the upper part of the container by a device whlch displaces radiall~ outwar~lY
the cylindrical wall of the mounting cup.
: ~ ~ Much effort has been directed to the provision o~ the gasket or gasket seal within the cup to ensure a positive sealing of the cup to the container in a manner which mini-mizes loss of the pressurized contents.
In its simplest iorm, the gasket can comprise a con-ventional ~lat rubber washer or annular gasket which is loosely received abo1~t the central body of the cup and sits -freely within the channel. Such gaskets are relativel~ e~-pensive and could, due to the relatively loose reception within the mounting cup, be displaced during the handling o~
the mounting assembly prior to and during the ~inal secure-ment to the container. Such gaskets are especiall~ suscept-ible o~ movement during the propellant ~illing operatlon and during valve assembly9 impairing the clinching operation~ In addition, pre-cut gaskets generally reside onl~ in the receiv-
2 "~
~ )7~ 7 ing channel of the mounting cup and do not provide a seal inthe critical area at which the mounting cup is clinched to the container~
¦A more common ty~e of gasket currentlY in co~mercial use is a l'flowed-inl' gasket in which a liquid solvent-based gasket-for~ing composition is deposited in the channel, caused to flow over ~he surfaces thereof~ the solvent evapo-rated from the material, and the remaining material cure~.
I This is an expensive procedure requiring multiple production steps including the use of ~uring ovens or other means for ¦ effecting the dryin~ and curing of the gasket material, and solvent removal means such as hoods and venting ductwork, in the case of non-aqueous solvents. Further, means must be provided for rotating the mounting cup beneath a metering apparatus which dlspenses carefully determined amounts of gasket-forming composition. The mounting cup must be handled carefully to maintain it in a horizontal position before the gasket solidifies. The resulting gasket tends to be of non~
uniform thickness in the clinch area o~ the cup and con-tainer. U.S. Patent No. 3,342,381 ~Simons et al) discloses a "flowed-in" gasket.
Another technique ~or disposing a gasket on the mounting cup is de~cribed in U.S. Patent Noc 3,417,177 (Simons et al).
That patent discloses a method comprising positioning a circular band o~ heat-~shrinkable material over a portion o~
the cylindrical wall of the ~ounting cup and therea~ter heating the cup to shrink the band o~ material into contact with the cup wall.
IZO 771~
U.S. Patent No~ 3,443,006 (Simons, et al) dissloses a method wherein a band o~ gasket material is swelled into place using a suitable swelling agent.
The heat shrinking and swelling methods are time consuming and require relatively expensive equlpment to either heat;the material or to recover swelling agent.
Another form of gasket currently in use is a sleeve gasket involving a tube o~ low density polyethylene which is nserted around the, central cylindrical bod~ e~tended at least partially into the annular channel, and then cut to the proper length. Such a sleev0 gasket has some advantages over the aforedescribed gaskets in the elimination of the comple~
and ~ime consuming curing and solvent removal procedures.
However, the procedures and equipment involved in the utili-zation of an extruded polyethYlene tube are comple~, partic-ularly if an intimate, frictional engagement o-E the sleeYe gasket with the body wall is to be achievedO The tube inser-tion and cutting operations must be careully performed to properly seat the tube onto the mounting cup. It is diffi-cult to dispose the polyethylene tube more than about halfway into *he receiving channel. European Patent Application No, 81300339.g more fully discloses the use o~ polyethylene tubes tG form gaskets, SUMMARY OF THE INVENTION
The present invention proposes a gasket and a gasket posi*ioning procedD~ ~hich constitute signi~icant a~vances ~Z~7~
in the art as heretofore developed, producing significant savings in both production time and materialsO The resultant mounted gasket, similar in appearance to the mounted sleeve gasket previously described, is formed and mounted to provide a positive frictional engagement with the mounting cup during the positioning of the gasket, providing a sealing capability which is consistant and as or more effective ~han any commer-cially ~easible system heretofore devised, notwithstanding the unique simplicity of the gasket and m~unting procedure involved~ In addition, ~he method of application of the gasket of the present invention eliminates a step require~ in the installation of the abovedsscribed sleeve gasket in that the former does not require cutting to size a~ter instal-lation.
The method of *his invention allows placement of a gasket on the mounting cup over the entire area at which sealing can be effected. Unlike with "flowed-in" gaskets and precut gaskets, the method of this invention conveniently provides a gasket of substantially uniform thickness at the clinch area between *he cup and container. Unlike with the polyethylene tube gasket, the method of this invention provides a gasket which can occup~ an~ desired portion o~ the receiving channel of the mounting cup~ Thus, the gasket can be positioned such that the maximum sealing area possible can be obtained.
The gasket o~ the valve mountlng assembl~ of the pre sent invention is in the nature o~ a thin planar annular sheet o~ an appropria*e sel~ sustaining de~or~able material of ~rom about 0.007 iDCheS iD thickness to about 0.025 inches in thickness~ The gasket material is preferabl~ a plastic or elastomeric material, or a combination o~ such materials.
The gasket material is most preferably low densit~ pol~eth-ylene approximately 0.014 inches in thicknessO This most preferred m~terial is basicall~ the same material and mate-rial thickness QS the above referred pol~eth~lene tubes used in the formation of sleeve gaskets. In applications in which lncreased flexibility and resistance to stress cracking is required it has been found advantageous to emplo~ a gasket comprising low density polyethylene and one or more addi-tives, such as~butyl rubbar, in amounts of up to abou~ 50 weight percent~
The planar or flat gasket of the present invention includes an inner periphery having a diameter at least slightly less than that of the diameter o~ the projecting cylindrical body o~ the mounting cup. The inside diameter of the gasket o~ the presen$ invention will be on the order o~
about one eighth inch less to about one-half inch less than the diameter o~ the cylindrical bod~ of thP mounting cup~
The outer diameter of the planar gasket is up to about one-eighth inch greater than the outer diameter o~ the mounting cup de~ined by the peripheral edge o~ the outwardl~ rolled flange which forms the ga~et receiving channel. The exact dimensions of the gasket will depend on the dimensions of the mounting cup and on the gasket material. The gasket should 3L2~:117~7 be of such dimensions that when installed b~ the metho~
recited herein the gasket substantiallY com~letel~ fills the volume between the rolled rim of the container and the mount ing cup.
The cylindrical body of the conventional 1 inch aerosol mount.ing cup used with a pre-cu~ or "flowed-in" gasket has an outside diameter of from about 0.98 inches to about 0.90 inches. In ths preferred embodiment oP the method of this invention, the gasket is disposed on the cylindrical wall of the mounting cup, ~s well as at least partially in the re-ceiving channel. Consequently, the diameter of the mounting cup is slightly less than the conven$ional mounting cup to accommodate the thickness of the gasket. For gaske*s o~ the preferred thickness of 0.014 inches, satisfactor~ results can be obtained ~ith mounting cups of diameters in the range o~
from about 0.95 inches to about 0096 inches.
In positioning the gasket within the mounting cup, the gasket is coaxially aligned over the cYlindrical body and forced inward thereover, deforming as it moves due to the inherent flow characteristics of the sheet material, into a configuration which conforms to th0 annular channel and the cylindrical adjacent portion o~ the cylindrical body. The gasket, when installed, is in int~mate ~rictional engagement with the body wall, precluding an~ possibility of leakage, displacement, or the like~
Actual installation of the annular ~lat gasket can be ef~cted simply and expeditiously utilizing apparatus includ-ing a guide bushing which receives the ~lat gasket, and an '7~L7 a%sociated inserter which, upon an aliynment o~ the gasket with the mounting cup, forces the gasket into position on the mounting cup in a single operation. The inserter may incorporate an internal spring biased centering unit which includes a cup engaging projection and a gasket seat to facilitate alignment of the gasket and cup during the gasket mounting operation.
In accordance with the present teachings, an apparatus is provided for use in the assembling of a planar gasket to a mounting cup having a cylindrical central projecting body surrounded by an annular gasket receiving channel, the apparatus comprises a guide bushing, a through passage de~ined through the bushing and opening through first and second ends of the bushing, the passage is adapted to receive a planar gasket therein adjacent the first end.
An inserter--is pro~ided introducable through the second end and longitudinally moveable through the passage, the inserter has a leading end, a chamber defined in the inserter and opening through the leading end to define a gasket engageable annular edge, the chamber is adapted for partial reception of the central body of a mounting cup therein through the first end of the bushing with the annular edge of the inserter being adapted to engage the gasket and effect a seating thereof within the gasket receiving channel as the projecting body of the cup moves into the chamber of the inserter.
In accordance with a further aspect, a method is provided of assembling a valve mounting assembly including a sealing gasket and a mounting cup which has a central cylindrical body of predeter-mined diameter with a surrounding annular gasket receiving channel.
The method includes providing a planar annular gasket having an inner periphery of lesser diameter than ~hat of the body, coaxially aligning the gasket normal to and adjacent the body, and forcibly moving the gasket into engagement with and about the body wherein that portion of the gasket adjacent the inner periphery thereof deforms into a sleeve-like configuration in intimate frictional conformance with the body.
:D
7;~7 Other objects and advantages of the invention may become apparent as the details of the in~ention are more fully herein-after described.
BRIEF DESCRI:I?TION OF THE D~ INGS
Figure 1 is a cross sectional detail illustrating the relationship between the ~alve mo-unting assembly of the present invention and a container to which it is to be mounted;
Figure 2 is a cross-sectional detail of the mounting cup and container in a clinched relationship;
Figure 3 is an exploded perspective view of a mounting cup and the planar gasket of the present invention~
Figures 4, 5 and 6 illustrate, se~uentially~ the mounting of the gasket;
Figures 7 and 8 illustrate one em~odiment of apparatus which may be used in the single operation mounting of the ga~ket;
and ~ Figures ~ and 10 illustrate a pre~ferred embodiment of the gasket moun~ing apparatus.
8a ~77~7 DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now more specificall~ to the drawings? re~-erence numeral 10 designates ~he valve mounting assembl~ o~
the present invention. This assembly includes a valve moun~-ing cup 12 of generally conventional construction, and a gasket 14, upique in both its construction and manner o~
association with the mounting oup.
Figure 1 illustrates the valve mounting assemblY 10 : ¦ p~sitioned ~ithin the open end of a container 16 to which it is ~o be sealed. The container 16 includes a rolled rim 18 directly receiving and supporting the appropriate peripheral portion of the assembly 10.
. Figure 2 illustrates the val~e mounting assembly 10 after having been clinched to container 16. To ensure an ef~ective, lasting seal the gasket 14 should be positioned such that it intimately contacts the mounting cup 12 and the container 16 along the entire circumference of clinch 11.
In order to more parti~cularly appreciate the structure o~ the mounting cup 12 and the gasket 14, attention is di-~ected to Figures 3 and 4 wherein the cup 12 is illustrated in an inverted position and the gasket 14 positione~ upward there~rom. The mounting cup 12 includes a central c~lindri-cal body 20 defined by an annular skirt or body wall 22 e~tendlng integrally from a circular base 24 and terminating in an outwardly and reversely rolled ~lange 26. The outward-ly rolled flange 26 defines an annular gasket receiving channel 28 surrounding the body 200 Centrally within ths . 9 ~ZC3t77~7 base 24 is a cylindrical well or boss 30 terminating in a circular end panel 32. The end panel 32 in turn has a cen-tral valve receiving aperture 34 therethroughO This con-struction is basically conventional in aerosol containers and the like.
With this basic construction, it is essential that a positive préssure resis~ant seal be provided between the cup 12 and the container 16 itsel~, and more particularl~ between the rolled rim 18 of the container 16 and both the channel 28 de~ined by revers~l~y roll0d flange 26 and the ad~acent portion of the cylindrical body ~all 22 o~ the bod~ 20. This posi-tive sealing is provided by utilization of the unique gasket 14 of the present inYention. The gasket is in the nature of a flat or planar annular disk of low density pol~ethvlene having a constant thickness of appro~imatelv 0~014 inches.
Such gaskets can be both readily and economically stamped from thin polyethylene sheets and are, because oP the inherent nature o~ the material thereo~, capable of ~eforming into intimate ~ngagement with the mountîng cup channel 28 and adjacent wall as shall be detailed presentl~.
The sheet-like gasket 14 includes an inner annular periphery 36 and an outer annular periphery 38. The inner periphery 36 is o~ a diame$er substantially less than that o~
the diameter o~ the cylindrical body 20. As an e~ample, the diameter of the cylindrical body ~0 will normally be on the order o~ O.9B inches, with the associated gasket havin~ an inner diameter which ma~ be a-ppro~imately one-eighth inch less $o approximately one~hal~ inch less, providing an 1 f~
.. .. 1 -- : , ~ 7 appro~imate one-sixteenth inch to one-qnarter inch overlap when the gasket 14 is positioned in overlying coaxial arrangement with the base 24 of the body 20. This relationship will be best appreciated from Figures 4 and 5 of the drawings. The diameter o~ the outer periphery 38 of the gasket 14 is from appro~imate,ly one-elghth inch less than, to up~o about one-eighth inch greater than, that of the mounting cap 12 itself as de~ined by the outer edge of the rolled flange 26.
The gasket 14, in ligh* o~ its configuration and size relationship to the mouDting cup, in coniunction with the .
inherent properties o~ the material, is innovativelY adapted to provide an economical and highl~ effective seal. This is achieved by the unique expedient of incorporating the gasket 14 into the mounting assembly 10 in the manner sequentiallv illustrated in Figures 4, 5 and 6. Basically, the flat gasket 14 is coaxially aligned over the inverted mounting cup 12. When so aligned, approximately one-eighth inch or more of the inner peripheral portion of the gasket vverlies the base 24 of the cylindrical body 20. The outer periphery 38 o~ the gasket generally aligns above the annular edge of the outwardly rolled flange 26. This relationship is shown in Figure 4.
Noting Figure ~ in particular, the gasket is then iorcibly moved inward over the c~lindrical bod~ 20, deforming as it telescopes over the body to enter into an intimate frictional engagement with the cylindrical wall 22 of the bod~ 20. Th~ inherent properties o~ the low density pol~-, . . .. . .. .. ... .. . . .. ... .. . . . ... ...
ethylene o~ the gasket 1~ allo~ for this flowing de~ormationof the planar member into a body engaging tubular con-~iguration with the gasket, in its innermost position, including both a bod~ encircling tubular or sleeve-like configuration and a channel conforming annular portion. The final seated position of the gasket will be best appreciated ~rom Figure~.6. It is preferred tha~ in the final seated position the gasket be disposed on $he wall 22 at the cir-cumference at ~hich the mounting cup and container are clinched, indicated by A in Figure 6. It is also preferred that the gasket be disposed at at least approximately the mid-point o~ the receiving channe]. 28, indicated by B in Figure 6.
Unlike with ~lowed-in gaskets and pre-cut gaskets, the method o~ this inventi.on allows the eas~ disposition of a gasket on any portion of wall 22. Unlike with tube gaskets, the method of this invention allows the easy disposition oi a gasket in any portion o~ the receiving channel 28.
In summary, the ~lat gasket, in essentiallY a single step9 is ~orclbly introduced over the r~lindrical bodY cf the mounting cup with the gasket deforming through engagement with the cylindrical body into intimate ~rictional engagement with both a substantial portion o~ *he cylindrical bodv and the per7pheral gasket receiving channel thereabout, Thus 9 a highly ef~ectiYe seal is achieved ~ithout the expenses, e~-tensive apparatus, and operational difficulties encountered in the systems presently used, including flow-in seals requiring a material curing and th~ like, and the use o~
~.~773L~
extruded tubular gaskets requiring forming members and a CUttiDg step a~ter installation.
One ~orm of the apparatus for assembling the g~sk~t 14 to the mounting cup 12 has b0en illustrate~ in Figures 7 and 8, which also present two of the stages in the assembl~ pro-cedure generally corresponding to those of Figures 4 and 6.
The apparatus includes a tubular guide bushing 40 having a central passage therethrough receiving, for relative longitudinal movement therein, an elongated tubular inserter 420 The guide bushing 40, and more particularlY the internal passage therethrough, is inwardly stepped at two poin*s therealong~ de~ining first and second annular shoulders or seats 44 and 460 Th~ first annular shoulder 44 is inwardl~
set from the lower end of the bushing a distan~e slightl~
greater than the height of the ~ormed channel 2~ of the mou~ting cup 12. The second shoulder 46 is inwardlv sPaced from the first shoulder 44 ~ a relatively greater amount.
The inserter 42 includes a downwardly opening chamber 48 having a single in~ardly directed step therein defining an annular shoulder or seat 50 spaced upwardly ~rom the annular lower edge o~ the tubular inserter 42 a distance greater than the height of the gasket receiving channel 28 of the mounting cup and at a height generally corresponding to the desired height of the ~ormed sleeve-like body surroundlng portion of the gasket in its ~inally seated position. The lo~er annular edge 52 o~ the inserter 42 is rounded or configured to gen-erally con~orm to the channel 28 to ensure a proper seating ~ 7~7~
of the gask~t within the channel. BV the ~m~ token, the width or thickness o~ the peripheral edge portion o~ the inserter below the shoulder is such as to move the ~asket, in cooperation ~ith the mounting cup, in the sequence of Figures 4, 5 and 6.
In using the apparatus of Figures 7 and 8, the gasket 14 i~ posit~oned, in any appropriate manner, ~ithin the lower portion of the guide bushing immediatel~ belo~ the shoulder 44, this portion being conigured to closely receive both the gasket 14 and the annular ou~wardl~ rolled flange 26 of the mounting cup, With the gasket 14 so positioned, the gasket and cup are a~iall~ aligned and moved relative to each other for introduction o~ the body 20 o~ the cup into the down-wardly opening chamber 48 o~ the inserter 42~ At this time, the gasket, through the action of the lower portion of the inserter 42, is forcibly engaged with the mountîng cup in the sequence illustrated in Figures 4, 5 and 6. As will be appreciated from Figure 8 in p~rticul ar, the c~lindrical bodY
20 of the cup lZ is closelY received ~ithin the chamber 48 o~
the inserter 42 with the shoulder 50 limiting upward movement o~ the sleeve-like portion of the positioned gasket, thus encouraging proper orientation of this gasket~ Similarl~, the shoulder 44 will limit inward movement o~ the cup bY
engagement of the peripheral edge o~ the cup flangs 26 there-against~ Depending upon the nature and size o~ the operation involved~ the apparatus may be manuall~ operated or automated b~ appropriate means no2 herein specificallY illustrated.
I ~l2~77:~7 Figures 9 and 10 illustrate another, and in ~act the preferred embodiment of mounting apparatus for assembling the gasket 14 to the mounting cup 12. Figure 9 illustrates the apparatus with the gasket received therein and the moun-ting cup aligned therewi~h immediately prior to a mounting of the gasket on the cup. Figure 10 illustrates the apparatus completing ~he engagement of the gasket with the mounting cup immediately prior to re~oval of the assembled cup and gasket.
As with the previously described apparatus, the apparatus sf Figur~s 9 and 10 includes a tubular guide bushing 54 having a central passage ~herethrough for the longitudinal recep~ion of an elongated tubular inserter 56.
The guide bushing 54 includes a relatively wide annular recess ~ormed peripherally about the inner ~all 60 thereof. This recess 58 is formed toward the lower end of the bushing 54 and de~ines a narrow annular support shoulder 61 at the lower end thereof. The support shoulder 61 receives, and initially stabilizes and positions9 the gasket 14 in a manner which will be readily apparent from Figure ~. The internal diameter of the bushing 54 at and below *he shoulder is slightly less than the internal diameter above the rece~s 58 with the wall below the recess accommo~ating the outwardly rolled ~lange 26 of the cup 12 while the ~all abo~e the re-cess 58 centrally positions and guides the longitudinall~
moveable i~serter ~or appropriate engagement thereof with the gasket 14 and into the gasket receiving channel 28 of the cup 12.
~o~
The inserter 56 is o~ generally cylindrical construc-tion and includes a lower portion 62 having an external diameter closely although freely receivable within the guide bushing 54 for longitudinal movement relative thereto~ The upper portion of the inserter 56 or bod~ thereo~, is o~ a slightly smaller external diameter than the lower portion 62.
A cen,tral enlarged downwardly opening chamber 64 is provided within ths lower portion 62 and defines an annular lower edge 66~ This lower edge 66 is rounded or configured generally to conform to the cup channel 28 ~or effec*ing the .
desired seating o~ the gasket 14 therein.
An upper chamber 68 communicates centrally with the chamber 64 and is o~ a reduced diameter relative thereto~
The inner or upper end o~ the upper chamber 68 in turn commu-nicates, through a central reduced diameter ap~rture 70, with an elongated bore 72 which opens throu~h the upper end o~
the inserter 56. Th~ bore 72 is of a slightl~ greater dia-meter than the aperture 70 while o~ a smaller ~iameter ~han the upper chamber 68u A centering unit 74 is received within the chambered inserter 56. This unit 74 includes a head 76 con~igured ~or olose sliding accommodation within the chamber 64. The head in turn includes an annular downwardl~ directed seat 7B de-~ined peripherally about *he lower face thereo~ ~or seating engagement of the gasket 14 thereagainst, as will be best noted in the phantom extension o~ the head 76 shown in Figure 9. In addition, a cylindrical centering knob or pro.iection 80, o~ lesser dlameter than the annular seat 78, depends cen-~ZC17~7 trally from the head for engagement through gasket 14 andinto the upwardly directed well 30 of the cup 12, thus combining with ~,he annular seat 78 ~or alignment of the components to be assembled.
A vertically elongated guide stem 82 is integrall~
formed with the head 78 and projects centrall~ there~rom upwardly id~o guiding relation within the uppbr chamber 68.
The guide stem is in turn retained for limited longitudinal reciprocation by a travel limiter 84 in the Dature o~ an elongated retaining bolt engaged through the aperture 70 and threadedly or otherwise af~ixed to the stem 82. The upper end o~ the limiter 84 includes an enlarged head 8R thereon which precludes passage through the aperture 70. The length of the bolt limiter 84 corresponds with the desired length of movement of the centering unit 74.
Finally, an expanded coil compression spring 88 encir-cles the bolt limiter 84 ~ithin the upper portion of the upper chamber 68, engaging between the upper end of the guide stem 82 and the upper end of the upper chamber to e~fect a resilient biasing of the centering unit 74 to the lower position thereoi, limited by engagement of the head 86 with the bottom o~ the bore 72..
In using the apparatus o~ Figures 9 and 10, the gasket 14 is positioned, in any appropriate manner, within the annular recess 5~ o~ the guide bushing 54 ~or supporting engagement on the lower shoulder or seat ~1. The fle2ible nature v~ the gasket 14 allows this to be readil~ e~fectedO
The head 76 on the lower portion o~ the ceDtering uni~ 74 :~L2~7~7 ¦ aligns with the gasket 14 wi th the centering knob ~0 received I through the central aperture of the gasket 14 and with the defined seat 78 receiving the inner portion of the gasket 14.
Arranged in this manner, it will be appreciated that the gasket is centrally located and stabilized about both the inner and outer peripheries thereof immediatelY below the annular lowér forming edge 66 of the lnserter.
With the gasket 14 so positioned the gasket 14 an~ the cup 12 are moved relative to each other for introduction o~
the cup into the guide bushing 54 with the central cYlindri cal body 20 of the cup moving ~nto the downwardly opening chamber 64 and the centering knob 80 e~tending into the upwardly opening well 30. Continued relative movement of the cup and gasket toward each other effects a sequence of steps, generally as ill~strat~d in Figures 4, 5 a~d 6, wherein the gasket:is forclbly engaged with the mounting cup. Thiæ in turn results in a configuring o~ the initiall~ planar gasket 14 into a sl~eve-like inner portion which closel~ conforms to the annular wall 22 o~ the cylindrical bod~ 20, and an outer portion which ].ies withln and intimately conforms to the channel 28.
As ~ill be noted in Figures 9 and 10, the lower portion of the chamber 64 can be of a slightly larger diameter, as at 90 to accommodate the upward configuration of the inner portion of the gasket 14 to the c~lindrical wall 22u Upo~
completion of the gasket mounting operation, pressure is released with the compre~sed spring 86 acting to assist in 12~77:~L7 ¦ ejecting the cup with mounted gasket therein. As ~ith the previously described apparatus, depending upon the natu~e an~
size of the operation involved, the apparatus may be manuall~
¦ operated or automated in an~ appropriate manner.
~ From the foregoing, it will be appreciated that a i unique gasket for a valve mounting assemblD has been de~ine~, along with ~pparatus and a procedure whereby the gasket, notwithstanding its initial planar or flat configuration, forms a seal which includes a sleeve-like portion surrounding the central cylindrical body of the mounting cup and conforms to and fuIly fills the body surrounding annular gasket channel7 ~9 i
~ )7~ 7 ing channel of the mounting cup and do not provide a seal inthe critical area at which the mounting cup is clinched to the container~
¦A more common ty~e of gasket currentlY in co~mercial use is a l'flowed-inl' gasket in which a liquid solvent-based gasket-for~ing composition is deposited in the channel, caused to flow over ~he surfaces thereof~ the solvent evapo-rated from the material, and the remaining material cure~.
I This is an expensive procedure requiring multiple production steps including the use of ~uring ovens or other means for ¦ effecting the dryin~ and curing of the gasket material, and solvent removal means such as hoods and venting ductwork, in the case of non-aqueous solvents. Further, means must be provided for rotating the mounting cup beneath a metering apparatus which dlspenses carefully determined amounts of gasket-forming composition. The mounting cup must be handled carefully to maintain it in a horizontal position before the gasket solidifies. The resulting gasket tends to be of non~
uniform thickness in the clinch area o~ the cup and con-tainer. U.S. Patent No. 3,342,381 ~Simons et al) discloses a "flowed-in" gasket.
Another technique ~or disposing a gasket on the mounting cup is de~cribed in U.S. Patent Noc 3,417,177 (Simons et al).
That patent discloses a method comprising positioning a circular band o~ heat-~shrinkable material over a portion o~
the cylindrical wall of the ~ounting cup and therea~ter heating the cup to shrink the band o~ material into contact with the cup wall.
IZO 771~
U.S. Patent No~ 3,443,006 (Simons, et al) dissloses a method wherein a band o~ gasket material is swelled into place using a suitable swelling agent.
The heat shrinking and swelling methods are time consuming and require relatively expensive equlpment to either heat;the material or to recover swelling agent.
Another form of gasket currently in use is a sleeve gasket involving a tube o~ low density polyethylene which is nserted around the, central cylindrical bod~ e~tended at least partially into the annular channel, and then cut to the proper length. Such a sleev0 gasket has some advantages over the aforedescribed gaskets in the elimination of the comple~
and ~ime consuming curing and solvent removal procedures.
However, the procedures and equipment involved in the utili-zation of an extruded polyethYlene tube are comple~, partic-ularly if an intimate, frictional engagement o-E the sleeYe gasket with the body wall is to be achievedO The tube inser-tion and cutting operations must be careully performed to properly seat the tube onto the mounting cup. It is diffi-cult to dispose the polyethylene tube more than about halfway into *he receiving channel. European Patent Application No, 81300339.g more fully discloses the use o~ polyethylene tubes tG form gaskets, SUMMARY OF THE INVENTION
The present invention proposes a gasket and a gasket posi*ioning procedD~ ~hich constitute signi~icant a~vances ~Z~7~
in the art as heretofore developed, producing significant savings in both production time and materialsO The resultant mounted gasket, similar in appearance to the mounted sleeve gasket previously described, is formed and mounted to provide a positive frictional engagement with the mounting cup during the positioning of the gasket, providing a sealing capability which is consistant and as or more effective ~han any commer-cially ~easible system heretofore devised, notwithstanding the unique simplicity of the gasket and m~unting procedure involved~ In addition, ~he method of application of the gasket of the present invention eliminates a step require~ in the installation of the abovedsscribed sleeve gasket in that the former does not require cutting to size a~ter instal-lation.
The method of *his invention allows placement of a gasket on the mounting cup over the entire area at which sealing can be effected. Unlike with "flowed-in" gaskets and precut gaskets, the method of this invention conveniently provides a gasket of substantially uniform thickness at the clinch area between *he cup and container. Unlike with the polyethylene tube gasket, the method of this invention provides a gasket which can occup~ an~ desired portion o~ the receiving channel of the mounting cup~ Thus, the gasket can be positioned such that the maximum sealing area possible can be obtained.
The gasket o~ the valve mountlng assembl~ of the pre sent invention is in the nature o~ a thin planar annular sheet o~ an appropria*e sel~ sustaining de~or~able material of ~rom about 0.007 iDCheS iD thickness to about 0.025 inches in thickness~ The gasket material is preferabl~ a plastic or elastomeric material, or a combination o~ such materials.
The gasket material is most preferably low densit~ pol~eth-ylene approximately 0.014 inches in thicknessO This most preferred m~terial is basicall~ the same material and mate-rial thickness QS the above referred pol~eth~lene tubes used in the formation of sleeve gaskets. In applications in which lncreased flexibility and resistance to stress cracking is required it has been found advantageous to emplo~ a gasket comprising low density polyethylene and one or more addi-tives, such as~butyl rubbar, in amounts of up to abou~ 50 weight percent~
The planar or flat gasket of the present invention includes an inner periphery having a diameter at least slightly less than that of the diameter o~ the projecting cylindrical body o~ the mounting cup. The inside diameter of the gasket o~ the presen$ invention will be on the order o~
about one eighth inch less to about one-half inch less than the diameter o~ the cylindrical bod~ of thP mounting cup~
The outer diameter of the planar gasket is up to about one-eighth inch greater than the outer diameter o~ the mounting cup de~ined by the peripheral edge o~ the outwardl~ rolled flange which forms the ga~et receiving channel. The exact dimensions of the gasket will depend on the dimensions of the mounting cup and on the gasket material. The gasket should 3L2~:117~7 be of such dimensions that when installed b~ the metho~
recited herein the gasket substantiallY com~letel~ fills the volume between the rolled rim of the container and the mount ing cup.
The cylindrical body of the conventional 1 inch aerosol mount.ing cup used with a pre-cu~ or "flowed-in" gasket has an outside diameter of from about 0.98 inches to about 0.90 inches. In ths preferred embodiment oP the method of this invention, the gasket is disposed on the cylindrical wall of the mounting cup, ~s well as at least partially in the re-ceiving channel. Consequently, the diameter of the mounting cup is slightly less than the conven$ional mounting cup to accommodate the thickness of the gasket. For gaske*s o~ the preferred thickness of 0.014 inches, satisfactor~ results can be obtained ~ith mounting cups of diameters in the range o~
from about 0.95 inches to about 0096 inches.
In positioning the gasket within the mounting cup, the gasket is coaxially aligned over the cYlindrical body and forced inward thereover, deforming as it moves due to the inherent flow characteristics of the sheet material, into a configuration which conforms to th0 annular channel and the cylindrical adjacent portion o~ the cylindrical body. The gasket, when installed, is in int~mate ~rictional engagement with the body wall, precluding an~ possibility of leakage, displacement, or the like~
Actual installation of the annular ~lat gasket can be ef~cted simply and expeditiously utilizing apparatus includ-ing a guide bushing which receives the ~lat gasket, and an '7~L7 a%sociated inserter which, upon an aliynment o~ the gasket with the mounting cup, forces the gasket into position on the mounting cup in a single operation. The inserter may incorporate an internal spring biased centering unit which includes a cup engaging projection and a gasket seat to facilitate alignment of the gasket and cup during the gasket mounting operation.
In accordance with the present teachings, an apparatus is provided for use in the assembling of a planar gasket to a mounting cup having a cylindrical central projecting body surrounded by an annular gasket receiving channel, the apparatus comprises a guide bushing, a through passage de~ined through the bushing and opening through first and second ends of the bushing, the passage is adapted to receive a planar gasket therein adjacent the first end.
An inserter--is pro~ided introducable through the second end and longitudinally moveable through the passage, the inserter has a leading end, a chamber defined in the inserter and opening through the leading end to define a gasket engageable annular edge, the chamber is adapted for partial reception of the central body of a mounting cup therein through the first end of the bushing with the annular edge of the inserter being adapted to engage the gasket and effect a seating thereof within the gasket receiving channel as the projecting body of the cup moves into the chamber of the inserter.
In accordance with a further aspect, a method is provided of assembling a valve mounting assembly including a sealing gasket and a mounting cup which has a central cylindrical body of predeter-mined diameter with a surrounding annular gasket receiving channel.
The method includes providing a planar annular gasket having an inner periphery of lesser diameter than ~hat of the body, coaxially aligning the gasket normal to and adjacent the body, and forcibly moving the gasket into engagement with and about the body wherein that portion of the gasket adjacent the inner periphery thereof deforms into a sleeve-like configuration in intimate frictional conformance with the body.
:D
7;~7 Other objects and advantages of the invention may become apparent as the details of the in~ention are more fully herein-after described.
BRIEF DESCRI:I?TION OF THE D~ INGS
Figure 1 is a cross sectional detail illustrating the relationship between the ~alve mo-unting assembly of the present invention and a container to which it is to be mounted;
Figure 2 is a cross-sectional detail of the mounting cup and container in a clinched relationship;
Figure 3 is an exploded perspective view of a mounting cup and the planar gasket of the present invention~
Figures 4, 5 and 6 illustrate, se~uentially~ the mounting of the gasket;
Figures 7 and 8 illustrate one em~odiment of apparatus which may be used in the single operation mounting of the ga~ket;
and ~ Figures ~ and 10 illustrate a pre~ferred embodiment of the gasket moun~ing apparatus.
8a ~77~7 DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now more specificall~ to the drawings? re~-erence numeral 10 designates ~he valve mounting assembl~ o~
the present invention. This assembly includes a valve moun~-ing cup 12 of generally conventional construction, and a gasket 14, upique in both its construction and manner o~
association with the mounting oup.
Figure 1 illustrates the valve mounting assemblY 10 : ¦ p~sitioned ~ithin the open end of a container 16 to which it is ~o be sealed. The container 16 includes a rolled rim 18 directly receiving and supporting the appropriate peripheral portion of the assembly 10.
. Figure 2 illustrates the val~e mounting assembly 10 after having been clinched to container 16. To ensure an ef~ective, lasting seal the gasket 14 should be positioned such that it intimately contacts the mounting cup 12 and the container 16 along the entire circumference of clinch 11.
In order to more parti~cularly appreciate the structure o~ the mounting cup 12 and the gasket 14, attention is di-~ected to Figures 3 and 4 wherein the cup 12 is illustrated in an inverted position and the gasket 14 positione~ upward there~rom. The mounting cup 12 includes a central c~lindri-cal body 20 defined by an annular skirt or body wall 22 e~tendlng integrally from a circular base 24 and terminating in an outwardly and reversely rolled ~lange 26. The outward-ly rolled flange 26 defines an annular gasket receiving channel 28 surrounding the body 200 Centrally within ths . 9 ~ZC3t77~7 base 24 is a cylindrical well or boss 30 terminating in a circular end panel 32. The end panel 32 in turn has a cen-tral valve receiving aperture 34 therethroughO This con-struction is basically conventional in aerosol containers and the like.
With this basic construction, it is essential that a positive préssure resis~ant seal be provided between the cup 12 and the container 16 itsel~, and more particularl~ between the rolled rim 18 of the container 16 and both the channel 28 de~ined by revers~l~y roll0d flange 26 and the ad~acent portion of the cylindrical body ~all 22 o~ the bod~ 20. This posi-tive sealing is provided by utilization of the unique gasket 14 of the present inYention. The gasket is in the nature of a flat or planar annular disk of low density pol~ethvlene having a constant thickness of appro~imatelv 0~014 inches.
Such gaskets can be both readily and economically stamped from thin polyethylene sheets and are, because oP the inherent nature o~ the material thereo~, capable of ~eforming into intimate ~ngagement with the mountîng cup channel 28 and adjacent wall as shall be detailed presentl~.
The sheet-like gasket 14 includes an inner annular periphery 36 and an outer annular periphery 38. The inner periphery 36 is o~ a diame$er substantially less than that o~
the diameter o~ the cylindrical body 20. As an e~ample, the diameter of the cylindrical body ~0 will normally be on the order o~ O.9B inches, with the associated gasket havin~ an inner diameter which ma~ be a-ppro~imately one-eighth inch less $o approximately one~hal~ inch less, providing an 1 f~
.. .. 1 -- : , ~ 7 appro~imate one-sixteenth inch to one-qnarter inch overlap when the gasket 14 is positioned in overlying coaxial arrangement with the base 24 of the body 20. This relationship will be best appreciated from Figures 4 and 5 of the drawings. The diameter o~ the outer periphery 38 of the gasket 14 is from appro~imate,ly one-elghth inch less than, to up~o about one-eighth inch greater than, that of the mounting cap 12 itself as de~ined by the outer edge of the rolled flange 26.
The gasket 14, in ligh* o~ its configuration and size relationship to the mouDting cup, in coniunction with the .
inherent properties o~ the material, is innovativelY adapted to provide an economical and highl~ effective seal. This is achieved by the unique expedient of incorporating the gasket 14 into the mounting assembly 10 in the manner sequentiallv illustrated in Figures 4, 5 and 6. Basically, the flat gasket 14 is coaxially aligned over the inverted mounting cup 12. When so aligned, approximately one-eighth inch or more of the inner peripheral portion of the gasket vverlies the base 24 of the cylindrical body 20. The outer periphery 38 o~ the gasket generally aligns above the annular edge of the outwardly rolled flange 26. This relationship is shown in Figure 4.
Noting Figure ~ in particular, the gasket is then iorcibly moved inward over the c~lindrical bod~ 20, deforming as it telescopes over the body to enter into an intimate frictional engagement with the cylindrical wall 22 of the bod~ 20. Th~ inherent properties o~ the low density pol~-, . . .. . .. .. ... .. . . .. ... .. . . . ... ...
ethylene o~ the gasket 1~ allo~ for this flowing de~ormationof the planar member into a body engaging tubular con-~iguration with the gasket, in its innermost position, including both a bod~ encircling tubular or sleeve-like configuration and a channel conforming annular portion. The final seated position of the gasket will be best appreciated ~rom Figure~.6. It is preferred tha~ in the final seated position the gasket be disposed on $he wall 22 at the cir-cumference at ~hich the mounting cup and container are clinched, indicated by A in Figure 6. It is also preferred that the gasket be disposed at at least approximately the mid-point o~ the receiving channe]. 28, indicated by B in Figure 6.
Unlike with ~lowed-in gaskets and pre-cut gaskets, the method o~ this inventi.on allows the eas~ disposition of a gasket on any portion of wall 22. Unlike with tube gaskets, the method of this invention allows the easy disposition oi a gasket in any portion o~ the receiving channel 28.
In summary, the ~lat gasket, in essentiallY a single step9 is ~orclbly introduced over the r~lindrical bodY cf the mounting cup with the gasket deforming through engagement with the cylindrical body into intimate ~rictional engagement with both a substantial portion o~ *he cylindrical bodv and the per7pheral gasket receiving channel thereabout, Thus 9 a highly ef~ectiYe seal is achieved ~ithout the expenses, e~-tensive apparatus, and operational difficulties encountered in the systems presently used, including flow-in seals requiring a material curing and th~ like, and the use o~
~.~773L~
extruded tubular gaskets requiring forming members and a CUttiDg step a~ter installation.
One ~orm of the apparatus for assembling the g~sk~t 14 to the mounting cup 12 has b0en illustrate~ in Figures 7 and 8, which also present two of the stages in the assembl~ pro-cedure generally corresponding to those of Figures 4 and 6.
The apparatus includes a tubular guide bushing 40 having a central passage therethrough receiving, for relative longitudinal movement therein, an elongated tubular inserter 420 The guide bushing 40, and more particularlY the internal passage therethrough, is inwardly stepped at two poin*s therealong~ de~ining first and second annular shoulders or seats 44 and 460 Th~ first annular shoulder 44 is inwardl~
set from the lower end of the bushing a distan~e slightl~
greater than the height of the ~ormed channel 2~ of the mou~ting cup 12. The second shoulder 46 is inwardlv sPaced from the first shoulder 44 ~ a relatively greater amount.
The inserter 42 includes a downwardly opening chamber 48 having a single in~ardly directed step therein defining an annular shoulder or seat 50 spaced upwardly ~rom the annular lower edge o~ the tubular inserter 42 a distance greater than the height of the gasket receiving channel 28 of the mounting cup and at a height generally corresponding to the desired height of the ~ormed sleeve-like body surroundlng portion of the gasket in its ~inally seated position. The lo~er annular edge 52 o~ the inserter 42 is rounded or configured to gen-erally con~orm to the channel 28 to ensure a proper seating ~ 7~7~
of the gask~t within the channel. BV the ~m~ token, the width or thickness o~ the peripheral edge portion o~ the inserter below the shoulder is such as to move the ~asket, in cooperation ~ith the mounting cup, in the sequence of Figures 4, 5 and 6.
In using the apparatus of Figures 7 and 8, the gasket 14 i~ posit~oned, in any appropriate manner, ~ithin the lower portion of the guide bushing immediatel~ belo~ the shoulder 44, this portion being conigured to closely receive both the gasket 14 and the annular ou~wardl~ rolled flange 26 of the mounting cup, With the gasket 14 so positioned, the gasket and cup are a~iall~ aligned and moved relative to each other for introduction o~ the body 20 o~ the cup into the down-wardly opening chamber 48 o~ the inserter 42~ At this time, the gasket, through the action of the lower portion of the inserter 42, is forcibly engaged with the mountîng cup in the sequence illustrated in Figures 4, 5 and 6. As will be appreciated from Figure 8 in p~rticul ar, the c~lindrical bodY
20 of the cup lZ is closelY received ~ithin the chamber 48 o~
the inserter 42 with the shoulder 50 limiting upward movement o~ the sleeve-like portion of the positioned gasket, thus encouraging proper orientation of this gasket~ Similarl~, the shoulder 44 will limit inward movement o~ the cup bY
engagement of the peripheral edge o~ the cup flangs 26 there-against~ Depending upon the nature and size o~ the operation involved~ the apparatus may be manuall~ operated or automated b~ appropriate means no2 herein specificallY illustrated.
I ~l2~77:~7 Figures 9 and 10 illustrate another, and in ~act the preferred embodiment of mounting apparatus for assembling the gasket 14 to the mounting cup 12. Figure 9 illustrates the apparatus with the gasket received therein and the moun-ting cup aligned therewi~h immediately prior to a mounting of the gasket on the cup. Figure 10 illustrates the apparatus completing ~he engagement of the gasket with the mounting cup immediately prior to re~oval of the assembled cup and gasket.
As with the previously described apparatus, the apparatus sf Figur~s 9 and 10 includes a tubular guide bushing 54 having a central passage ~herethrough for the longitudinal recep~ion of an elongated tubular inserter 56.
The guide bushing 54 includes a relatively wide annular recess ~ormed peripherally about the inner ~all 60 thereof. This recess 58 is formed toward the lower end of the bushing 54 and de~ines a narrow annular support shoulder 61 at the lower end thereof. The support shoulder 61 receives, and initially stabilizes and positions9 the gasket 14 in a manner which will be readily apparent from Figure ~. The internal diameter of the bushing 54 at and below *he shoulder is slightly less than the internal diameter above the rece~s 58 with the wall below the recess accommo~ating the outwardly rolled ~lange 26 of the cup 12 while the ~all abo~e the re-cess 58 centrally positions and guides the longitudinall~
moveable i~serter ~or appropriate engagement thereof with the gasket 14 and into the gasket receiving channel 28 of the cup 12.
~o~
The inserter 56 is o~ generally cylindrical construc-tion and includes a lower portion 62 having an external diameter closely although freely receivable within the guide bushing 54 for longitudinal movement relative thereto~ The upper portion of the inserter 56 or bod~ thereo~, is o~ a slightly smaller external diameter than the lower portion 62.
A cen,tral enlarged downwardly opening chamber 64 is provided within ths lower portion 62 and defines an annular lower edge 66~ This lower edge 66 is rounded or configured generally to conform to the cup channel 28 ~or effec*ing the .
desired seating o~ the gasket 14 therein.
An upper chamber 68 communicates centrally with the chamber 64 and is o~ a reduced diameter relative thereto~
The inner or upper end o~ the upper chamber 68 in turn commu-nicates, through a central reduced diameter ap~rture 70, with an elongated bore 72 which opens throu~h the upper end o~
the inserter 56. Th~ bore 72 is of a slightl~ greater dia-meter than the aperture 70 while o~ a smaller ~iameter ~han the upper chamber 68u A centering unit 74 is received within the chambered inserter 56. This unit 74 includes a head 76 con~igured ~or olose sliding accommodation within the chamber 64. The head in turn includes an annular downwardl~ directed seat 7B de-~ined peripherally about *he lower face thereo~ ~or seating engagement of the gasket 14 thereagainst, as will be best noted in the phantom extension o~ the head 76 shown in Figure 9. In addition, a cylindrical centering knob or pro.iection 80, o~ lesser dlameter than the annular seat 78, depends cen-~ZC17~7 trally from the head for engagement through gasket 14 andinto the upwardly directed well 30 of the cup 12, thus combining with ~,he annular seat 78 ~or alignment of the components to be assembled.
A vertically elongated guide stem 82 is integrall~
formed with the head 78 and projects centrall~ there~rom upwardly id~o guiding relation within the uppbr chamber 68.
The guide stem is in turn retained for limited longitudinal reciprocation by a travel limiter 84 in the Dature o~ an elongated retaining bolt engaged through the aperture 70 and threadedly or otherwise af~ixed to the stem 82. The upper end o~ the limiter 84 includes an enlarged head 8R thereon which precludes passage through the aperture 70. The length of the bolt limiter 84 corresponds with the desired length of movement of the centering unit 74.
Finally, an expanded coil compression spring 88 encir-cles the bolt limiter 84 ~ithin the upper portion of the upper chamber 68, engaging between the upper end of the guide stem 82 and the upper end of the upper chamber to e~fect a resilient biasing of the centering unit 74 to the lower position thereoi, limited by engagement of the head 86 with the bottom o~ the bore 72..
In using the apparatus o~ Figures 9 and 10, the gasket 14 is positioned, in any appropriate manner, within the annular recess 5~ o~ the guide bushing 54 ~or supporting engagement on the lower shoulder or seat ~1. The fle2ible nature v~ the gasket 14 allows this to be readil~ e~fectedO
The head 76 on the lower portion o~ the ceDtering uni~ 74 :~L2~7~7 ¦ aligns with the gasket 14 wi th the centering knob ~0 received I through the central aperture of the gasket 14 and with the defined seat 78 receiving the inner portion of the gasket 14.
Arranged in this manner, it will be appreciated that the gasket is centrally located and stabilized about both the inner and outer peripheries thereof immediatelY below the annular lowér forming edge 66 of the lnserter.
With the gasket 14 so positioned the gasket 14 an~ the cup 12 are moved relative to each other for introduction o~
the cup into the guide bushing 54 with the central cYlindri cal body 20 of the cup moving ~nto the downwardly opening chamber 64 and the centering knob 80 e~tending into the upwardly opening well 30. Continued relative movement of the cup and gasket toward each other effects a sequence of steps, generally as ill~strat~d in Figures 4, 5 a~d 6, wherein the gasket:is forclbly engaged with the mounting cup. Thiæ in turn results in a configuring o~ the initiall~ planar gasket 14 into a sl~eve-like inner portion which closel~ conforms to the annular wall 22 o~ the cylindrical bod~ 20, and an outer portion which ].ies withln and intimately conforms to the channel 28.
As ~ill be noted in Figures 9 and 10, the lower portion of the chamber 64 can be of a slightly larger diameter, as at 90 to accommodate the upward configuration of the inner portion of the gasket 14 to the c~lindrical wall 22u Upo~
completion of the gasket mounting operation, pressure is released with the compre~sed spring 86 acting to assist in 12~77:~L7 ¦ ejecting the cup with mounted gasket therein. As ~ith the previously described apparatus, depending upon the natu~e an~
size of the operation involved, the apparatus may be manuall~
¦ operated or automated in an~ appropriate manner.
~ From the foregoing, it will be appreciated that a i unique gasket for a valve mounting assemblD has been de~ine~, along with ~pparatus and a procedure whereby the gasket, notwithstanding its initial planar or flat configuration, forms a seal which includes a sleeve-like portion surrounding the central cylindrical body of the mounting cup and conforms to and fuIly fills the body surrounding annular gasket channel7 ~9 i
Claims (9)
1. A method of assembling a valve mounting assembly including a sealing gasket and a mounting cup having a cen-tral cylindrical body of predetermined diameter with a sur-rounding annular gasket receiving channel; said method including providing a planar annular gasket having an inner periphery of lesser diameter than that of said body, co-axially aligning said gasket normal to and adjacent said body, and forcibly moving said gasket into engagement with and about said body wherein the portion of the gasket adjacent the inner periphery thereof deforms into a sleeve-like configuration in intimate frictional conformance with the body.
2. The method of Claim 1 wherein the movement of the gasket over the body continues until seated engagement of the gasket in the body surrounding annular channel.
3. Apparatus for use in the assemblying of a planar gasket to a mounting cup having a cylindrical central pro-jecting body surrounded by an annular gasket receiving channel; said apparatus comprising a guide bushing, a through passage defined through said bushing and opening through opposite first and second ends of the bushing, said passage being adapted to receive a planar gasket therein adjacent the first end, an inserter introducable through the second end and longitudinally moveable through said passage, said in-serter having a leading end, a chamber defined in said inserter and opening through said leading end to define a gasket engageable annular edge, said chamber being adapted for partial reception of the central body of a mounting cup therein through the first end of the bushing with the annular edge of the inserter adapted to engage the gasket and effect a seating thereof within the gasket receiving channel as the projecting body of the cup moves into the chamber of the inserter.
4. The apparatus of Claim 3 wherein said bushing passage, adjacent the first end, has an annular gasket positioning recess defined therein.
5. The apparatus of Claim 4 wherein said inserter includes a centering unit within said chamber and reciprocal-ly moveable toward and away from the leading end, said centering unit including a head configured for close sliding accommodation within the chamber, and a central projection on said head directed outwardly toward the leading end for centering engagement with a mounting cup.
6. The apparatus of Claim 5 including an outwardly directed gasket receiving annular seat defined in said head peripherally about the central projection in spaced relation thereto.
7. The apparatus of Claim 6 including means resil-iently biasing said central unit outwardly relative to said leading end, and means limiting the outward movement.
8. The apparatus of Claim 6 including a second chamber inward of said first chamber and centrally communi-cating therewith, and a guiding extension projecting central-ly from said head and extending into guiding engagement within said second chamber.
9. The apparatus of Claim 8 including an elongated bore communicating with said second chamber remote from said first chamber, said means limiting outward movement of the centering unit engaging said guiding extension within said second chamber and extending longitudinally into said bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000491473A CA1222729A (en) | 1982-07-06 | 1985-09-24 | Valve mounting assembly for aerosol containers and the like |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US39543482A | 1982-07-06 | 1982-07-06 | |
| US395,434 | 1982-07-06 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000491473A Division CA1222729A (en) | 1982-07-06 | 1985-09-24 | Valve mounting assembly for aerosol containers and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1207717A true CA1207717A (en) | 1986-07-15 |
Family
ID=23563025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000420068A Expired CA1207717A (en) | 1982-07-06 | 1983-01-24 | Valve mounting assembly for aerosol containers and the like |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE895710A (en) |
| CA (1) | CA1207717A (en) |
| DE (1) | DE3302662A1 (en) |
| FR (1) | FR2529867B1 (en) |
| GB (2) | GB2123899B (en) |
| IT (1) | IT1171069B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1315217C (en) * | 1987-05-07 | 1993-03-30 | Robert Henry Abplanalp | Aerosol container closure |
| CN110227922B (en) * | 2018-12-14 | 2024-04-19 | 湖北森鑫汽车零部件有限公司 | Sealing gasket processing equipment for automobile engine |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB912225A (en) * | 1958-07-29 | 1962-12-05 | Rech S Tech Et Commerciales S | Reservoir for fluid under pressure provided with a valve |
| DE1625217A1 (en) * | 1967-09-18 | 1970-06-25 | Grace W R & Co | Aerosol container |
| AU423893B2 (en) * | 1968-10-18 | 1972-05-05 | W. R. Grace & Co | Aerosol container closures |
| US3702310A (en) * | 1969-01-29 | 1972-11-07 | Grace W R & Co | Gasket-forming compositions having improved resistance to water-based aerosol products |
| DE2021643A1 (en) * | 1970-05-02 | 1972-05-18 | Thomas Gmbh | Valve plate for spray cans |
| DE2042931A1 (en) * | 1970-08-29 | 1972-03-02 | Schickedanz, Gerhard, 6070 Langen | Valve disc for spray cans |
| FR2225934A5 (en) * | 1973-04-13 | 1974-11-08 | Reboul Sa Sofra | |
| IN154639B (en) * | 1980-02-01 | 1984-11-24 | Abplanalp Robert H |
-
1983
- 1983-01-24 CA CA000420068A patent/CA1207717A/en not_active Expired
- 1983-01-26 BE BE0/209973A patent/BE895710A/en not_active IP Right Cessation
- 1983-01-27 DE DE3302662A patent/DE3302662A1/en not_active Withdrawn
- 1983-03-03 FR FR8303508A patent/FR2529867B1/en not_active Expired
- 1983-04-28 GB GB08311617A patent/GB2123899B/en not_active Expired
- 1983-05-20 IT IT21220/83A patent/IT1171069B/en active
-
1986
- 1986-02-04 GB GB08602720A patent/GB2172058B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IT1171069B (en) | 1987-06-10 |
| FR2529867A1 (en) | 1984-01-13 |
| IT8321220A0 (en) | 1983-05-20 |
| GB2123899B (en) | 1987-02-25 |
| GB8602720D0 (en) | 1986-03-12 |
| GB2172058B (en) | 1987-02-25 |
| DE3302662A1 (en) | 1984-01-12 |
| GB8311617D0 (en) | 1983-06-02 |
| GB2172058A (en) | 1986-09-10 |
| BE895710A (en) | 1983-05-16 |
| FR2529867B1 (en) | 1986-08-29 |
| GB2123899A (en) | 1984-02-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2294306C2 (en) | Valve for aerosol powder | |
| US4621964A (en) | Valve mounting assembly for aerosol containers and the like | |
| EP0975533B1 (en) | Coupling | |
| AU2034099A (en) | A hand-operated pump with a trigger, for dispensing liquids | |
| CN112173411A (en) | Full-plastic self-locking pump | |
| CA1207717A (en) | Valve mounting assembly for aerosol containers and the like | |
| JPS61111158A (en) | Creasing-able cap aggregate for centrifugal separating tube | |
| EP0033626B1 (en) | Aerosol container closures | |
| WO1999039986A1 (en) | Fuel cap | |
| US6341711B1 (en) | Valve mounting assembly for aerosol container and method | |
| US6959478B2 (en) | Shockproof spindle | |
| US3727883A (en) | Butterfly valve | |
| US4547948A (en) | Method for the mass production of a gasket-bearing mounting cup | |
| AU2007362967B2 (en) | An aerosol container of the nail gun and the filling method therefore | |
| WO1993012982A1 (en) | A dimpled gasket | |
| US4704778A (en) | Valve mounting assembly for aerosol containers and the like | |
| KR100485302B1 (en) | Aerosol Cup with Gasket | |
| US4546525A (en) | Apparatus for the mass production of a gasket-bearing aerosol mounting cup | |
| CA1222729A (en) | Valve mounting assembly for aerosol containers and the like | |
| EP0246598A2 (en) | Valve cup for aerosol container | |
| CN210338990U (en) | Large flow valve | |
| US5213231A (en) | Aerosol container closure | |
| CA1204080A (en) | Aerosol container closure | |
| CN113090942B (en) | Non-refillable pressure bottle | |
| CA2503676A1 (en) | Drop tube segments adapted for use with a liquid reservoir and methods |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |