CA1194005A - Electrostatically sprayed mounting cup gasket - Google Patents
Electrostatically sprayed mounting cup gasketInfo
- Publication number
- CA1194005A CA1194005A CA000422059A CA422059A CA1194005A CA 1194005 A CA1194005 A CA 1194005A CA 000422059 A CA000422059 A CA 000422059A CA 422059 A CA422059 A CA 422059A CA 1194005 A CA1194005 A CA 1194005A
- Authority
- CA
- Canada
- Prior art keywords
- mounting cup
- aerosol
- mounting
- aerosol container
- coating
- 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
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
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An improved aerosol assembly and method of making same is disclosed for an aerosol container having a container sealing bead disposed about an upper opening in the aerosol container. The invention includes a mounting cup having a mounting cup sealing rim extending about the periphery thereof. A valve assembly is disposed in the mounting cup for providing fluid communication between the interior of the aerosol container and the exterior of the aerosol container. A sealing gasket is electrostatically applied to one of the sealing beads or the sealing rim for providing a fluid tight seal when the mounting cup is secured to the aerosol container. The invention also includes the method of electrostatically applying a resilient material for providing the seal between the mounting cup and the aerosol container. A particular embodiment of the invention provides a combined scaling gasket and protective coating for the mounting cup with either a uniform or preferential coating thickness.
An improved aerosol assembly and method of making same is disclosed for an aerosol container having a container sealing bead disposed about an upper opening in the aerosol container. The invention includes a mounting cup having a mounting cup sealing rim extending about the periphery thereof. A valve assembly is disposed in the mounting cup for providing fluid communication between the interior of the aerosol container and the exterior of the aerosol container. A sealing gasket is electrostatically applied to one of the sealing beads or the sealing rim for providing a fluid tight seal when the mounting cup is secured to the aerosol container. The invention also includes the method of electrostatically applying a resilient material for providing the seal between the mounting cup and the aerosol container. A particular embodiment of the invention provides a combined scaling gasket and protective coating for the mounting cup with either a uniform or preferential coating thickness.
Description
BACKGROUND OF THE INVENTION
Field of the Invention -This invention relates to fluid sprinkling and more particularly to an apparatus and method of forming a iluid tight seal between a mounting cup and an aerosol container.
Description of the Prior Art The aerosol ;nclustry has undergone dramatic and substantial changes since the birth of the industry many decades ago. It has been a constant desire of the aerosol inclustry to increase the reliability of the aerosol clevices while s;multaneously reducing the manufacturing ancl the consumer costs of the aerosol device. Each individual part of the aerosGl device has been investigated in an attempt to reduce the part cost as well as the cost of assembly of the aerosol device. The time required to fabrtcate each individual part as well as time required to fabricate the device, has been investigated in a continuing attempt to further reduce the cost of aerosol devices. If a single step in the assembly process can be accomplished in a shorter period of time~ a substantial reduction in overall cost will be realized by the increase in production.
Field of the Invention -This invention relates to fluid sprinkling and more particularly to an apparatus and method of forming a iluid tight seal between a mounting cup and an aerosol container.
Description of the Prior Art The aerosol ;nclustry has undergone dramatic and substantial changes since the birth of the industry many decades ago. It has been a constant desire of the aerosol inclustry to increase the reliability of the aerosol clevices while s;multaneously reducing the manufacturing ancl the consumer costs of the aerosol device. Each individual part of the aerosGl device has been investigated in an attempt to reduce the part cost as well as the cost of assembly of the aerosol device. The time required to fabrtcate each individual part as well as time required to fabricate the device, has been investigated in a continuing attempt to further reduce the cost of aerosol devices. If a single step in the assembly process can be accomplished in a shorter period of time~ a substantial reduction in overall cost will be realized by the increase in production.
2 0 Among the mo5t time consuming steps in the fabrication of an aerosol valve is the application of a sealing gasket material to the aerosol mounting cup for sealing with the aerosol container. In general, the aerosol mounting cup is fabricated by first stamping a sheet material through a progressive die to form the mounting cup 2 5 turret with a central -throllgh aperture and peripheral sealing rim ~or sealing with an annular bead disposed on the aerosol container.
The stamped mounting cups are oriented for enabling a solvent based gasket material to be poured into the rim of the mounting cup. The solvent based gasket material is allowed to set at room temperature for approximately one hour and is then progressively passed through three curing ovens. The three progressive ovens are typically set at 150C, 250C and 350C. The mounting cup is placed in each oven for approximately one hour in order to remove the solvent totally from the solvcnt based gasket material an<l to
The stamped mounting cups are oriented for enabling a solvent based gasket material to be poured into the rim of the mounting cup. The solvent based gasket material is allowed to set at room temperature for approximately one hour and is then progressively passed through three curing ovens. The three progressive ovens are typically set at 150C, 250C and 350C. The mounting cup is placed in each oven for approximately one hour in order to remove the solvent totally from the solvcnt based gasket material an<l to
3 5 leave a solvent residue of rubber to effect the seal between the mounting cup and the aerosol cor~tainer. The heated mounting cups are allowed to cool to proper handling temperature prior to assembly with the aerosol valve and dip tube. Presently this prior art process requires approximately four and one-half hours of time for 5 each mounting cup to p~ ovide a suitable coating for sealing with the aeY osol cor-tainer~ However, since the solvent based gaslcet materiill is allowed to flow into the moullting cup rim, the resultant solid residue of rubber i3 irregular in thickness and may result in a defective seal between the mounting cup and the aerosol container.
Others in the prior art use a precoated process wherein the ~nounting cup stock is unrolled and coated with a gasket material.
The sheet stock is punched and formed to create the aerosol valve mounting cup. Since the sheet stock is coated prior to forming, substantial stresses are developed within the coating. In addition, 15 the coating may be damaged during the punching and forming process .
U. S. Patent 3,417,117 illustrates a sealing gasket for an aerosol mounting cup formed by positioning a circular band of heat-shrinkable material over a portion of the skirt of the mounting 2 0 cup . The mounting cup is then heated to shrink the band of material into frictional contact with the skirt of the mounting cup.
U. S. Patent 3,443,006 pertains to a method of making a gasketed closure element by s~relling a band of gasket material and positioning the band of gasket material about the skirt of the 2 5 rnounting cup . The band of gasket material is then allowed to return to a normal condition to be in frictional engagement with the mounting cup skirt.
t)thers in the prior art have utili~ed electrostatic spraying of paints on other coatings, but such processes have not been applied 3 0 to tbe application of sealing gaske-ts .
Although many in the prior art have attempted various methods to reduce the time required to apply a gasket material to an aerosol mounting cup, the prior art has heretofore failed to provide an ine~pensive and reliable method which is a suitable replacement to 35 the solvent based coating and gasket material or the precoated process which are pr~esently universally used in the aerosol inclustry.
Therefore, it is an object of this invention to prov;de an apparatus which overcomes the aforementioned difficulties of the prior art devices and provides an impro~emen t which is a significant contribution to the aclvancement of the aerosol art.
Ano-ther object of this invention is to provide an improved seal between an acrosol container and a mounting cup incorporating the deposition oF a unifnrm thickness of plastic material on a sealir~g surface which may be readily cured into a resilient sealing material to provide a fluid tight seal between the mounting cup and the aerosol container.
Another object of this invention is to provide an itnproved seal between an aerosol container and a mounting cup incorpora-ting the deposition of a preferentially thick~r eoating of plastic material on a sealing surface with a preerentially thinner coating of plastic l S material on the remainder of the mounting cup .
Another object of this invention is to provide an improved seal between an aerosol container ancl a mounting cup wherein the time required to cure the deposited resilient gasket material is substantially less than the time required to liberate the solvent of a 2 0 solvent based gasket material of the prior art .
Another object of this invention is to provide an improved seal between an aer~sol container and a mounting cup wherein a resilient plastic gasket material is electrostat;cally sprayed onto the mounting cup to provide a uniform or preferential coating on the sealing 2 5 surface .
Another object of this invention is to provide an improved seal between an aerosol contain~ar and a mounting cup wherein a resilient gasket material is deposited on the entire interllal area of the mounting cup for providing a fluid tight seal between the mounting cup and the aerosol container as well as protecting the mounting cup from the procluct internal the aerosol container.
Another object of this invention is to provide an improved seal between an aerosol container and a mounting cup which may be colored to provide an integral color code for the mounting cup.
Another object of this invention is to provide an improved seal between an aerosol container and a mounting cup which substantially reduces the cost of fabrication of aerosol assemblies.
Another object of this invention is to provide a method of Eabricating an aerosol valve and mounting cup through the use of electrostatically spraying an individual mounting cup with a resilient coating and applying heat to cure the resilient coating prior to 5 rece;ving the aerosol valve within the mounting cup.
~ nother object of this invention is to provide a method for applying a seallng gasket material to a sea1ing surface between a mounting cup and an aerosol container incorporating electrostatically spraying plastic material on the sealing surface and the application 10 of heat to cure the pla5tic material into a integral resilient coating.
The foregoing has outlined some of the more pertinerlt objects of the invention. These objects should be construed to be merely illustrative of some of the more prominent features and applications of the intended invention. Many other beneficial results can be 15 attained by applying the disclosed invention in a different manner or modifying the invention within the scope of the disclosure.
Accordingly, other objects and a fuller understanding of the invention may be had by referring to the summary of the invention and the detailed description describing the preferred embodiment in 2 0 addition to the scope of the invention defined by the claims taken in conJunction with the accompanying drawings.
~L9~
SUMMARY OF THE INVENTION
The invention is defined by the appended claim~ with a specific embodiment shown in the attached drawings. For the purpose of summ~ri~ing the invention, the invention may be 5 incorporated into an improved aerosol assembly for an aerosol container having conta;ner sealing means disposed about an upper ope~ling in the aerosol container. The invention comprises a mounting cup havinL~ a mounting cup sealing means e~tending about the periphery thereof. A valve assembly is disposed in the 10 mounting cup for providing Eluid cornmunication between the interior of the aerosol container and the exterior of the aerosol container.
A sealing gasket is electrostatically applied on one of the sealing means for providing a fluid tight se;~l when the mounting cup is secured to the aerosol container. In a more specific embodiment of 15 the invention, the aerosol container includes a container sealing bead disposed about the periphery of an opening in the aerosol container. A rim is disposed about the periphery of the mounting cup for cooperation ~;7ith the bead of the aerosol container. The sealing gasket is electrostatically disposed on the interior of the 2 o mounting cup rim for sealing engagement with the bead of the aerosol container. The sealing gasket may be electrostatically disposed upon the entire interior surface of the mounting cup for providing a seal between the mounting cup and the aerosol container and for protecting the interior of the mounting cup from 2 5 the product internal the aerosol container . In the alternative, the sealing gasket may be electrostatically disposed upon the entlre interior and exterior surface of the mounting cup for protecting the interior and exterior surfaces thereof. Further, the coating may be applied to provide a preferential thicker coating on the mounting 30 ~.up rim relative to the remainder of the mounting cup. The sealing gasket may be colored to provide an integral color code for the mounting cup.
The invention also comprises the method of fabricating an aerosol valve and mounting cup assembly and the method of 3 5 fabricating an aerosol dispenser comprising the step of stamping the mounting cup from a metallic sheet material. The method includes the step of electrostatically spraying the mounting cup with a resilient coating, preferablv from a plastic material. Hea-t is applied to the resilient coating to cure the coating upon tlle mounting cup.
The mounting cup is cooled and the aerosol valve i9 then secured to the electrostatically coated moun-ting cup. The aerosol dispenser i5 5 further fabricated in the conventional manner.
The foregoing has outline~l rather broadly the more pertinent and important features of the present invention in order that the detailed description of the invention that follows may be better understood so thnt the present contribution to the art can be more 10 fully appreciatecl. Additional features of the invention will be - described hereinafter which form the subject of the claims of the invention. It shottld be appreciated by those skilled in the art that the conception ~nd the specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for 15 carrying out the same purposes of the present invention. It should also be realized by those skilled in the art that such equivalent constructions do not depart from the spirit and scope of the invention as set forth in the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
For a fuller understanding of the nature and obJects of the invention, reference should be had to the following detailed description taken in connection with the accompanying drawings in 5 which:
Fig. 1 is a side sectional view of a conventional mounting cup and aerosol valve assembly;
Fig. 2 is a partial side sectlonal view showing the fluid tight seal between a conventional aerosol valve assembly and an aerosol 10container;
Fig. 3 is a side sectional view of a moun-ting cup and aerosol valve assembly in accordance with the present invention;
Fig. 4 is a side sectional view of a second embodiment of a mounting cup and aerosol valve assembly in accordance with the 15present invention;
Fig. 5 illustrates a prior art process for fabricating the mounting cup shown in Fig. l;
Fig. 6 illustrates the improved method of forming the mounting cup as shown in Fig. 3 in accordance with the present invention;
2 0Figs . 7-9 illustrate various steps in the electrostatic coating of the mounting cup shown in Fig. 3;
Fig. 10 is a side sectional view of a third embodiment of a mounting cup incorporating a preferential coating thiclcness; and Fig. 11 is a side sectional view illustrating the geometry of 2 5electrostatic spraying to provide the preferential coating thickness to the mounting cup shown in Fig. 10.
Similar reference characters refer to similar parts throughout the several views of the drawings.
DETAILED l~ESCRIPTION
Fig. 1 illustrates a side sectional view of a prior art aerosol mounting cup and valve assembly 10 which should be well known to those skilled in the art. I'he assembly comprises a mounting cup 12 5 hav;ng a central turret 14 ancl a mounting rim 1~ extending about the outer periphery of -the mounting cup 12. The turret 14 receives an aerosol valve assembly which may be of various designs to operate between an interior surface 17 ancl an e~{terior surface l8~ Irl this embodiment, a valve body 19 communicates with the 10 interior of the aerosol container through a dip tube 20. A valve 2~
is biased by a spring 24 into sealing engagement with a sealing gasket 26 for controlling the flow of product and propellant through a metering orifice 28 communicating to a valve stem aperture 30.
The mounting rim 16 is provided with a sealing gasket 32 15 which is generally a solvent-based rubber material which fvrms a seal with a bead 34 of an aerosol container 36 as shown more fully in Fig. 2. Typically, the mounting cup rim 16 is inserted on the aerosol container bead 34 with the mounting cup rim being deformed at 38 to form a fluid tight seal tnrough the coating 32 on the 2 0 mounting cup rim 16 .
Fig. 3 illustrates a mounting cup and aerosol valve assembly 10A in accordance with the present invention. Under the practice of this invention the sealing gasket 32A extends along the entire interior surface 17 of the mounting cup in addition to being applied 2 5 thereto in an entirely distinct manner . The sealing gasket material 32A may optionally be applied to the exterior surface 18 of the mounting cup as shown by coating 32B in Fig. 4.
Fig. 5 illustrates the steps in the formation of the mounting cup 12 shown in Fig. 1 under a prior art practice. A ribbon of 3 0 roll ~tock 41 disposed on a drum 'L2 is passed -through a series of progressive dies 44 to form the contour of the mounting cup 12 shown in Fig. 1. The formed mounting cups 12 are passe~l through an orienter 46 which orients the mounting cups 12 such that the interior surface 17 is face up enabling an applicator 48 to apply a 3 5 solvent based gasket material 32 to flow into the mounting cup rim 16. After the initial coating of the gasket material 32, the mounting cups 12 are allowed to remain at an ambient temperature _g_ station 50 for a period of approximately one hour. Ihe mounting cups 12 are then passed through progressive ovens Sl, 52 and 53 which respectively have temperatures of approximately 150C, 250C
ancl 350C. The mounting cups 12 remain in each of the ovens 51-53 for a period of one hour prior to being removed and cooled in position 54. After cooling, the mounting cups 12 may be fabricated in a conventional manner as should he well known to those skilled in the ar t .
~ig . 6 illustrates the step in the formation of the mo~m ting cup l2A shown in Fig. 3 under the present invention. In a similar manner, the ribbon of roll stock 41 is ciisposed on a drum 42 to be passed through a series of progressive dies 44 to form the contour of the mounting cup 12A shown in Fig. 3. The formed mounting cups 12A are passed through an orienter 46A which orients the mounting cups such that the interior surface 17A is face up and plased upon conveyor 60 which is preferably a dielectric material as shown in Figs. 7-9. The conveyor 60 is shown as an endless conveyor disposed between drive rollers 62 and 64 to automatically move the mounting cups 12A through an electrostatic coating device 66. In this embodiment, .he conveyor 60 includes a recess 68 for receiving the contour of the mounting cup 12A and to limit the coating to only the interior surface 17A of the mounting cup 12A.
It should be appreciated by those skilled in the art that numerous other types of conveyors may be utilized to coat selective portions 2 5 of the mounting cup 12A or to reorient the mounting cup to coat both the exterior and interior surfaces 17A and 18A of the mounting cup 12A as shown in Fig. 4. An electrical conductor 70 is preferably spring biased into electrical contact to the mounting cup 12A as shown in Figs. 7-9. The electrical connector 70 is 3 0 preferably connected to the positive side of the electrostatic coating apparatus 66 shown in Fig. 6 with the negative side of the power supply being connected to the electrostatic spray nozzles 72 in Fig.
6, The mounting cups 12A are passed through the el~ctrostatic coating apparatus 66 with charged particulate plastic material being sprayed from nozzles 72 to be attracted to the mounting cups 12A
by virtue of electrostatic attraction as shown more clearly in Fig.
8. Upon completion of the coating as shown in Fig. 9, the mounting cups are discharged along a conveyor 7d5 powered by rollers 76 and 7B.
The electrostatically coated mounting cups 12A are passed into a curing oven 80 for approximately 6 minutes at 425F. The curing oven melts the particulate plastic material into a continuous resilient gaske-t and protective coating. The completed mounting cups 12A are removed on conveyor 82 powered by rollers 78 and 84. Whereas thè prior art system shown in Fig. 5 required approximately four and one-half hours per mounting CUp, the new process shown in Fig. 6 requires a total of approximately 8 minutes and provides a superior and more uniform coated sealing gasket 3ZA
than heretofore realized in the prior art. It should also be appreciated that the electrostatic coating not only provides a sealing gasket to the rim 16 but also provides a protective coating to the interior surface 17A to protect the moun~ing cup from the product and propellant internal the aerosol container. Since the gasket material is deposited and cured subsequent to the fabrication of the mounting cup 12A, the resilient sealing gasket is not stressed as in 2 0 one of the prior art processes . Various materials may be used to coat the mounting cups lZA including polyethylene, polypropylene, vinyl, nylon, acetate or other powdered plastic materials. The further advantage of the process resides in the short period of time required in the o~ren 80. Accordingly, a continuous process oven may be used to melt the plastic powder to form the coating 32A on the mounting cup 12A. The mounting cups 12A may be coated on the interior ancl exterior surface 17 and 18 to provide a protectiv-3 coating or a color coding depending upon the particular application of the rnounting cup 12A in the aerosol industry. In addition, various types of electrostatic spraying and orienting devices 46 may be utilized to accomplish the desired coating of the mounting cup 12~. Preferably, the resilient plastic gasl;et coating 32A has a thickness between 0 . 010 inches and 0 . 030 inches.
It should be appreciated by those skilled in the art that a very uniform coating ;s appliecl to the mounting cup surface 12A by this process. A wide variety of plastics that can be used for compatibility with the various products and propellants within the .5 aerosol container. This invention provides less coating damage than the precoated prio~ art process wherein a rolled stock is ~mrolled and epoxy coated with a gasket material~ The coated stock is rerolled prior to stamping in a progressiYe die. FurtherJ since the coatirlg efficiency of the electros-tatic process is higher than any other process heretofore utilized in the aerosol industry ~ the re.sultant cost of the coating is substantially less than the prior art. I'he proces.s further eliminates the problem of solvent èvaporation inlto the atmosphere which may adversely effect the environment.
Figs. 10 and 11 illustrate a variation of the embodiment shown in Figs. 3-9. In this embodiment, the combined sealing gasket and protective coating is preferentially disposed about the interior surface 17B of the mounting cup 12B shown in Fig. 10.
Preferably, the coating has a greater thickness in the rim 16 as illustrated by the thickness of the coating 32B as opposed to the adjacent areas 32C of the mounting cup 12B. Coating areas 32D
and 32E have a greater thickness than the adjacent areas 32F. The preferential coating thickness as shown in Fig. 10 provides a 2 o thickness of material at 32B sufficient to provide a proper se~l ~,vith the aerosol container while simultaneously minimizing the amount of material utilized for coating the entire interior surface 17B of the mounting cup 12B.
Fig. 11 illustrates the preferred method of forming the preferential coated mounting cup shown in Fig. 10. In this emboclimentJ the electrostatic head 100 includes a static chamber 104 which produces a static charge on the plastic particles 106 as the particles are sprayed therethrough. Accordingly, an electrostatic powcr source is not required when utilizing this type of electrostatic spraying device. The term "electrostatic spraying device" as used in this speciEication contemplates the use of both electrostatic spraying with an electrostatic power source as well as electrostatic spraying ~vithout the use of an electrostatic power source .
The sprayhead 100 is affixed to face in a downward direction to utilize the force of gravity (G) as indicated by the arrow 108 with the mountlng cup 12B disposed on the conveyor 160 as shown, with the interior surface 17B facing upwardly with rim 16 located in recess 168. The force of gravity as illustrated by the arrow 108 acting on the particles 106 provides a preferential increase in thickness in areas 32B 32D and 32E in Fig. 10. The spraying process is adjustecl to enable the thickness of the coating 32B to be sufficient to provide a suitable seal with an aerosol container at rim 16. Accordingly the coating thickness is preferentially thinner in at-eas that clo not function as sealing surfaces but :functivn as a protective coating such as 32C and 32F. The preferential coating thickness .s~lbstantially reduces the cost ancl increases the reliability of -the electrostatically sprayed plastic material by utilizing the force of gravity during the electrostatic spraying process. After the spraying process is completed as sho~n by 66 in Fig. 6, the preferentially coated mounting cups 12B n~ay then be processed in the manner as set forth in Fig. 6.
The prior art mounting cup gasket typically uses a precoated steel having a one-half pound of tin plate to one hundred pounds of steel. This material can be secured with the tin plate on either one or plural sides. The use of the coated mountin~ cup as shown in 2 0 Fig . 3 eliminates the need for a tin coating on the interior surface 17 while the embodiment of Fig. 4 eliminates the need for tin coating thus further reducing the cost of the materials.
Accordingly, black plate steel may be utilized in lieu of tin plated steel, depenclin~ upon the process utilized under this invention.
2 5 It should be appreciated by those skilled in the art that the va~ious embodiments shown in the present specification may be interchanged and other variations may be incorporatecd within the present invention without departing from the present contribution to the art.
The present disclosure includes that contained in the appended claims as well as that of the foregoing description. Although this invent:lon has been described in its preferred form with a certain degree of particularity i-t is understood that the present disclosure of the preferred form has been made only by way of example and 3 5 that numerous changes in the cletails of construction ancl the cornbination and arrangeLnent of parts may be resorted to without departing from the spirit and scope of the invention.
Others in the prior art use a precoated process wherein the ~nounting cup stock is unrolled and coated with a gasket material.
The sheet stock is punched and formed to create the aerosol valve mounting cup. Since the sheet stock is coated prior to forming, substantial stresses are developed within the coating. In addition, 15 the coating may be damaged during the punching and forming process .
U. S. Patent 3,417,117 illustrates a sealing gasket for an aerosol mounting cup formed by positioning a circular band of heat-shrinkable material over a portion of the skirt of the mounting 2 0 cup . The mounting cup is then heated to shrink the band of material into frictional contact with the skirt of the mounting cup.
U. S. Patent 3,443,006 pertains to a method of making a gasketed closure element by s~relling a band of gasket material and positioning the band of gasket material about the skirt of the 2 5 rnounting cup . The band of gasket material is then allowed to return to a normal condition to be in frictional engagement with the mounting cup skirt.
t)thers in the prior art have utili~ed electrostatic spraying of paints on other coatings, but such processes have not been applied 3 0 to tbe application of sealing gaske-ts .
Although many in the prior art have attempted various methods to reduce the time required to apply a gasket material to an aerosol mounting cup, the prior art has heretofore failed to provide an ine~pensive and reliable method which is a suitable replacement to 35 the solvent based coating and gasket material or the precoated process which are pr~esently universally used in the aerosol inclustry.
Therefore, it is an object of this invention to prov;de an apparatus which overcomes the aforementioned difficulties of the prior art devices and provides an impro~emen t which is a significant contribution to the aclvancement of the aerosol art.
Ano-ther object of this invention is to provide an improved seal between an acrosol container and a mounting cup incorporating the deposition oF a unifnrm thickness of plastic material on a sealir~g surface which may be readily cured into a resilient sealing material to provide a fluid tight seal between the mounting cup and the aerosol container.
Another object of this invention is to provide an itnproved seal between an aerosol container and a mounting cup incorpora-ting the deposition of a preferentially thick~r eoating of plastic material on a sealing surface with a preerentially thinner coating of plastic l S material on the remainder of the mounting cup .
Another object of this invention is to provide an improved seal between an aerosol container ancl a mounting cup wherein the time required to cure the deposited resilient gasket material is substantially less than the time required to liberate the solvent of a 2 0 solvent based gasket material of the prior art .
Another object of this invention is to provide an improved seal between an aer~sol container and a mounting cup wherein a resilient plastic gasket material is electrostat;cally sprayed onto the mounting cup to provide a uniform or preferential coating on the sealing 2 5 surface .
Another object of this invention is to provide an improved seal between an aerosol contain~ar and a mounting cup wherein a resilient gasket material is deposited on the entire interllal area of the mounting cup for providing a fluid tight seal between the mounting cup and the aerosol container as well as protecting the mounting cup from the procluct internal the aerosol container.
Another object of this invention is to provide an improved seal between an aerosol container and a mounting cup which may be colored to provide an integral color code for the mounting cup.
Another object of this invention is to provide an improved seal between an aerosol container and a mounting cup which substantially reduces the cost of fabrication of aerosol assemblies.
Another object of this invention is to provide a method of Eabricating an aerosol valve and mounting cup through the use of electrostatically spraying an individual mounting cup with a resilient coating and applying heat to cure the resilient coating prior to 5 rece;ving the aerosol valve within the mounting cup.
~ nother object of this invention is to provide a method for applying a seallng gasket material to a sea1ing surface between a mounting cup and an aerosol container incorporating electrostatically spraying plastic material on the sealing surface and the application 10 of heat to cure the pla5tic material into a integral resilient coating.
The foregoing has outlined some of the more pertinerlt objects of the invention. These objects should be construed to be merely illustrative of some of the more prominent features and applications of the intended invention. Many other beneficial results can be 15 attained by applying the disclosed invention in a different manner or modifying the invention within the scope of the disclosure.
Accordingly, other objects and a fuller understanding of the invention may be had by referring to the summary of the invention and the detailed description describing the preferred embodiment in 2 0 addition to the scope of the invention defined by the claims taken in conJunction with the accompanying drawings.
~L9~
SUMMARY OF THE INVENTION
The invention is defined by the appended claim~ with a specific embodiment shown in the attached drawings. For the purpose of summ~ri~ing the invention, the invention may be 5 incorporated into an improved aerosol assembly for an aerosol container having conta;ner sealing means disposed about an upper ope~ling in the aerosol container. The invention comprises a mounting cup havinL~ a mounting cup sealing means e~tending about the periphery thereof. A valve assembly is disposed in the 10 mounting cup for providing Eluid cornmunication between the interior of the aerosol container and the exterior of the aerosol container.
A sealing gasket is electrostatically applied on one of the sealing means for providing a fluid tight se;~l when the mounting cup is secured to the aerosol container. In a more specific embodiment of 15 the invention, the aerosol container includes a container sealing bead disposed about the periphery of an opening in the aerosol container. A rim is disposed about the periphery of the mounting cup for cooperation ~;7ith the bead of the aerosol container. The sealing gasket is electrostatically disposed on the interior of the 2 o mounting cup rim for sealing engagement with the bead of the aerosol container. The sealing gasket may be electrostatically disposed upon the entire interior surface of the mounting cup for providing a seal between the mounting cup and the aerosol container and for protecting the interior of the mounting cup from 2 5 the product internal the aerosol container . In the alternative, the sealing gasket may be electrostatically disposed upon the entlre interior and exterior surface of the mounting cup for protecting the interior and exterior surfaces thereof. Further, the coating may be applied to provide a preferential thicker coating on the mounting 30 ~.up rim relative to the remainder of the mounting cup. The sealing gasket may be colored to provide an integral color code for the mounting cup.
The invention also comprises the method of fabricating an aerosol valve and mounting cup assembly and the method of 3 5 fabricating an aerosol dispenser comprising the step of stamping the mounting cup from a metallic sheet material. The method includes the step of electrostatically spraying the mounting cup with a resilient coating, preferablv from a plastic material. Hea-t is applied to the resilient coating to cure the coating upon tlle mounting cup.
The mounting cup is cooled and the aerosol valve i9 then secured to the electrostatically coated moun-ting cup. The aerosol dispenser i5 5 further fabricated in the conventional manner.
The foregoing has outline~l rather broadly the more pertinent and important features of the present invention in order that the detailed description of the invention that follows may be better understood so thnt the present contribution to the art can be more 10 fully appreciatecl. Additional features of the invention will be - described hereinafter which form the subject of the claims of the invention. It shottld be appreciated by those skilled in the art that the conception ~nd the specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for 15 carrying out the same purposes of the present invention. It should also be realized by those skilled in the art that such equivalent constructions do not depart from the spirit and scope of the invention as set forth in the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
For a fuller understanding of the nature and obJects of the invention, reference should be had to the following detailed description taken in connection with the accompanying drawings in 5 which:
Fig. 1 is a side sectional view of a conventional mounting cup and aerosol valve assembly;
Fig. 2 is a partial side sectlonal view showing the fluid tight seal between a conventional aerosol valve assembly and an aerosol 10container;
Fig. 3 is a side sectional view of a moun-ting cup and aerosol valve assembly in accordance with the present invention;
Fig. 4 is a side sectional view of a second embodiment of a mounting cup and aerosol valve assembly in accordance with the 15present invention;
Fig. 5 illustrates a prior art process for fabricating the mounting cup shown in Fig. l;
Fig. 6 illustrates the improved method of forming the mounting cup as shown in Fig. 3 in accordance with the present invention;
2 0Figs . 7-9 illustrate various steps in the electrostatic coating of the mounting cup shown in Fig. 3;
Fig. 10 is a side sectional view of a third embodiment of a mounting cup incorporating a preferential coating thiclcness; and Fig. 11 is a side sectional view illustrating the geometry of 2 5electrostatic spraying to provide the preferential coating thickness to the mounting cup shown in Fig. 10.
Similar reference characters refer to similar parts throughout the several views of the drawings.
DETAILED l~ESCRIPTION
Fig. 1 illustrates a side sectional view of a prior art aerosol mounting cup and valve assembly 10 which should be well known to those skilled in the art. I'he assembly comprises a mounting cup 12 5 hav;ng a central turret 14 ancl a mounting rim 1~ extending about the outer periphery of -the mounting cup 12. The turret 14 receives an aerosol valve assembly which may be of various designs to operate between an interior surface 17 ancl an e~{terior surface l8~ Irl this embodiment, a valve body 19 communicates with the 10 interior of the aerosol container through a dip tube 20. A valve 2~
is biased by a spring 24 into sealing engagement with a sealing gasket 26 for controlling the flow of product and propellant through a metering orifice 28 communicating to a valve stem aperture 30.
The mounting rim 16 is provided with a sealing gasket 32 15 which is generally a solvent-based rubber material which fvrms a seal with a bead 34 of an aerosol container 36 as shown more fully in Fig. 2. Typically, the mounting cup rim 16 is inserted on the aerosol container bead 34 with the mounting cup rim being deformed at 38 to form a fluid tight seal tnrough the coating 32 on the 2 0 mounting cup rim 16 .
Fig. 3 illustrates a mounting cup and aerosol valve assembly 10A in accordance with the present invention. Under the practice of this invention the sealing gasket 32A extends along the entire interior surface 17 of the mounting cup in addition to being applied 2 5 thereto in an entirely distinct manner . The sealing gasket material 32A may optionally be applied to the exterior surface 18 of the mounting cup as shown by coating 32B in Fig. 4.
Fig. 5 illustrates the steps in the formation of the mounting cup 12 shown in Fig. 1 under a prior art practice. A ribbon of 3 0 roll ~tock 41 disposed on a drum 'L2 is passed -through a series of progressive dies 44 to form the contour of the mounting cup 12 shown in Fig. 1. The formed mounting cups 12 are passe~l through an orienter 46 which orients the mounting cups 12 such that the interior surface 17 is face up enabling an applicator 48 to apply a 3 5 solvent based gasket material 32 to flow into the mounting cup rim 16. After the initial coating of the gasket material 32, the mounting cups 12 are allowed to remain at an ambient temperature _g_ station 50 for a period of approximately one hour. Ihe mounting cups 12 are then passed through progressive ovens Sl, 52 and 53 which respectively have temperatures of approximately 150C, 250C
ancl 350C. The mounting cups 12 remain in each of the ovens 51-53 for a period of one hour prior to being removed and cooled in position 54. After cooling, the mounting cups 12 may be fabricated in a conventional manner as should he well known to those skilled in the ar t .
~ig . 6 illustrates the step in the formation of the mo~m ting cup l2A shown in Fig. 3 under the present invention. In a similar manner, the ribbon of roll stock 41 is ciisposed on a drum 42 to be passed through a series of progressive dies 44 to form the contour of the mounting cup 12A shown in Fig. 3. The formed mounting cups 12A are passed through an orienter 46A which orients the mounting cups such that the interior surface 17A is face up and plased upon conveyor 60 which is preferably a dielectric material as shown in Figs. 7-9. The conveyor 60 is shown as an endless conveyor disposed between drive rollers 62 and 64 to automatically move the mounting cups 12A through an electrostatic coating device 66. In this embodiment, .he conveyor 60 includes a recess 68 for receiving the contour of the mounting cup 12A and to limit the coating to only the interior surface 17A of the mounting cup 12A.
It should be appreciated by those skilled in the art that numerous other types of conveyors may be utilized to coat selective portions 2 5 of the mounting cup 12A or to reorient the mounting cup to coat both the exterior and interior surfaces 17A and 18A of the mounting cup 12A as shown in Fig. 4. An electrical conductor 70 is preferably spring biased into electrical contact to the mounting cup 12A as shown in Figs. 7-9. The electrical connector 70 is 3 0 preferably connected to the positive side of the electrostatic coating apparatus 66 shown in Fig. 6 with the negative side of the power supply being connected to the electrostatic spray nozzles 72 in Fig.
6, The mounting cups 12A are passed through the el~ctrostatic coating apparatus 66 with charged particulate plastic material being sprayed from nozzles 72 to be attracted to the mounting cups 12A
by virtue of electrostatic attraction as shown more clearly in Fig.
8. Upon completion of the coating as shown in Fig. 9, the mounting cups are discharged along a conveyor 7d5 powered by rollers 76 and 7B.
The electrostatically coated mounting cups 12A are passed into a curing oven 80 for approximately 6 minutes at 425F. The curing oven melts the particulate plastic material into a continuous resilient gaske-t and protective coating. The completed mounting cups 12A are removed on conveyor 82 powered by rollers 78 and 84. Whereas thè prior art system shown in Fig. 5 required approximately four and one-half hours per mounting CUp, the new process shown in Fig. 6 requires a total of approximately 8 minutes and provides a superior and more uniform coated sealing gasket 3ZA
than heretofore realized in the prior art. It should also be appreciated that the electrostatic coating not only provides a sealing gasket to the rim 16 but also provides a protective coating to the interior surface 17A to protect the moun~ing cup from the product and propellant internal the aerosol container. Since the gasket material is deposited and cured subsequent to the fabrication of the mounting cup 12A, the resilient sealing gasket is not stressed as in 2 0 one of the prior art processes . Various materials may be used to coat the mounting cups lZA including polyethylene, polypropylene, vinyl, nylon, acetate or other powdered plastic materials. The further advantage of the process resides in the short period of time required in the o~ren 80. Accordingly, a continuous process oven may be used to melt the plastic powder to form the coating 32A on the mounting cup 12A. The mounting cups 12A may be coated on the interior ancl exterior surface 17 and 18 to provide a protectiv-3 coating or a color coding depending upon the particular application of the rnounting cup 12A in the aerosol industry. In addition, various types of electrostatic spraying and orienting devices 46 may be utilized to accomplish the desired coating of the mounting cup 12~. Preferably, the resilient plastic gasl;et coating 32A has a thickness between 0 . 010 inches and 0 . 030 inches.
It should be appreciated by those skilled in the art that a very uniform coating ;s appliecl to the mounting cup surface 12A by this process. A wide variety of plastics that can be used for compatibility with the various products and propellants within the .5 aerosol container. This invention provides less coating damage than the precoated prio~ art process wherein a rolled stock is ~mrolled and epoxy coated with a gasket material~ The coated stock is rerolled prior to stamping in a progressiYe die. FurtherJ since the coatirlg efficiency of the electros-tatic process is higher than any other process heretofore utilized in the aerosol industry ~ the re.sultant cost of the coating is substantially less than the prior art. I'he proces.s further eliminates the problem of solvent èvaporation inlto the atmosphere which may adversely effect the environment.
Figs. 10 and 11 illustrate a variation of the embodiment shown in Figs. 3-9. In this embodiment, the combined sealing gasket and protective coating is preferentially disposed about the interior surface 17B of the mounting cup 12B shown in Fig. 10.
Preferably, the coating has a greater thickness in the rim 16 as illustrated by the thickness of the coating 32B as opposed to the adjacent areas 32C of the mounting cup 12B. Coating areas 32D
and 32E have a greater thickness than the adjacent areas 32F. The preferential coating thickness as shown in Fig. 10 provides a 2 o thickness of material at 32B sufficient to provide a proper se~l ~,vith the aerosol container while simultaneously minimizing the amount of material utilized for coating the entire interior surface 17B of the mounting cup 12B.
Fig. 11 illustrates the preferred method of forming the preferential coated mounting cup shown in Fig. 10. In this emboclimentJ the electrostatic head 100 includes a static chamber 104 which produces a static charge on the plastic particles 106 as the particles are sprayed therethrough. Accordingly, an electrostatic powcr source is not required when utilizing this type of electrostatic spraying device. The term "electrostatic spraying device" as used in this speciEication contemplates the use of both electrostatic spraying with an electrostatic power source as well as electrostatic spraying ~vithout the use of an electrostatic power source .
The sprayhead 100 is affixed to face in a downward direction to utilize the force of gravity (G) as indicated by the arrow 108 with the mountlng cup 12B disposed on the conveyor 160 as shown, with the interior surface 17B facing upwardly with rim 16 located in recess 168. The force of gravity as illustrated by the arrow 108 acting on the particles 106 provides a preferential increase in thickness in areas 32B 32D and 32E in Fig. 10. The spraying process is adjustecl to enable the thickness of the coating 32B to be sufficient to provide a suitable seal with an aerosol container at rim 16. Accordingly the coating thickness is preferentially thinner in at-eas that clo not function as sealing surfaces but :functivn as a protective coating such as 32C and 32F. The preferential coating thickness .s~lbstantially reduces the cost ancl increases the reliability of -the electrostatically sprayed plastic material by utilizing the force of gravity during the electrostatic spraying process. After the spraying process is completed as sho~n by 66 in Fig. 6, the preferentially coated mounting cups 12B n~ay then be processed in the manner as set forth in Fig. 6.
The prior art mounting cup gasket typically uses a precoated steel having a one-half pound of tin plate to one hundred pounds of steel. This material can be secured with the tin plate on either one or plural sides. The use of the coated mountin~ cup as shown in 2 0 Fig . 3 eliminates the need for a tin coating on the interior surface 17 while the embodiment of Fig. 4 eliminates the need for tin coating thus further reducing the cost of the materials.
Accordingly, black plate steel may be utilized in lieu of tin plated steel, depenclin~ upon the process utilized under this invention.
2 5 It should be appreciated by those skilled in the art that the va~ious embodiments shown in the present specification may be interchanged and other variations may be incorporatecd within the present invention without departing from the present contribution to the art.
The present disclosure includes that contained in the appended claims as well as that of the foregoing description. Although this invent:lon has been described in its preferred form with a certain degree of particularity i-t is understood that the present disclosure of the preferred form has been made only by way of example and 3 5 that numerous changes in the cletails of construction ancl the cornbination and arrangeLnent of parts may be resorted to without departing from the spirit and scope of the invention.
Claims (17)
1. An improved aerosol assembly for an aerosol container having container sealing means disposed about an upper opening in the aerosol container, comprising in combination:
a mounting cup having mounting cup sealing means extending about the periphery thereof;
a valve assembly disposed in said mounting cup for providing fluid communication between the interior of the aerosol container and the exterior of the aerosol container; and a sealing gasket electrostatically applied on one of said sealing means for providing a fluid tight seal when said mounting cup is secured to the aerosol container.
a mounting cup having mounting cup sealing means extending about the periphery thereof;
a valve assembly disposed in said mounting cup for providing fluid communication between the interior of the aerosol container and the exterior of the aerosol container; and a sealing gasket electrostatically applied on one of said sealing means for providing a fluid tight seal when said mounting cup is secured to the aerosol container.
2. An improved aerosol assembly as set forth in claim 1, wherein said sealing gasket is electrostatically disposed on said mounting cup sealing means.
3. An improved aerosol assembly as set forth in claim 1, wherein the aerosol container includes a container bead disposed about the periphery of an opening in the aerosol container;
said mounting cup including a rim disposed about the periphery thereof for cooperation with the container bead; and said sealing gasket being electrostatically disposed on the interior of said rim for sealing engagement with the container bead of the aerosol container.
said mounting cup including a rim disposed about the periphery thereof for cooperation with the container bead; and said sealing gasket being electrostatically disposed on the interior of said rim for sealing engagement with the container bead of the aerosol container.
4. An improved aerosol assembly as set forth in claim 1, wherein said sealing gasket is electrostatically disposed upon the entire interior surface of said mounting cup for providing a seal between said mounting cup and the aerosol container for protecting the interior of the mounting cup from the substance internal the aerosol container.
5. An improved aerosol assembly as set forth in claim 1, wherein said sealing gasket is electrostatically disposed upon the entire interior and exterior surface of said mounting cup for protecting the interior and exterior surfaces of the mounting cup.
6. An improved aerosol assembly as set forth in claim 1, wherein said sealing gasket is colored to provide an integral color code for said mounting cup.
7. An improved aerosol assembly for an aerosol container having a container bead disposed about the periphery of an opening in the aerosol container, comprising in combination:
a mounting cup having a rim disposed about the periphery thereof for cooperation with the container bead disposed about the periphery of the opening in the aerosol container;
a valve assembly disposed in said mounting cup for providing fluid communication between the interior of the aerosol container and the exterior of the aerosol container; and a resilient plastic material electrostatically applied to said mounting cup rim to a thickness sufficient to provide a resilient sealing gasket when said mounting cup is secured to the aerosol container.
a mounting cup having a rim disposed about the periphery thereof for cooperation with the container bead disposed about the periphery of the opening in the aerosol container;
a valve assembly disposed in said mounting cup for providing fluid communication between the interior of the aerosol container and the exterior of the aerosol container; and a resilient plastic material electrostatically applied to said mounting cup rim to a thickness sufficient to provide a resilient sealing gasket when said mounting cup is secured to the aerosol container.
8. An improved aerosol assembly as set forth in claim 7, wherein said resilient plastic material is applied to the entire interior surface of said mounting cup.
9. An improved aerosol assembly as set forth in claim 7, wherein said resilient plastic material is applied to the entire interior and exterior surface of said mounting cup.
10. An improved aerosol assembly as set forth in claim 7, wherein said resilient plastic material is applied to the entire interior surface of said mounting cup at a substantially uniform thickness.
11. An improved aerosol assembly as set forth in claim 7, wherein said resilient plastic material is applied to the entire surface of said mounting cup with the thickness of said resilient plastic material being greater at said mounting cup rim relative to at least one other portion of said interior surface of said mounting cup.
12. The method of fabricating an aerosol valve and mounting cup assembly for an aerosol container, comprising the steps of:
stamping the mounting cup from a metallic sheet material;
electrostatically spraying the mounting cup with a resilient coating;
applying heat to cure the resilient coating;
cooling the electrostatically coated mounting cup; and securing the aerosol valve to the electrostatically coated mounting cup.
stamping the mounting cup from a metallic sheet material;
electrostatically spraying the mounting cup with a resilient coating;
applying heat to cure the resilient coating;
cooling the electrostatically coated mounting cup; and securing the aerosol valve to the electrostatically coated mounting cup.
13. The method of fabricating aerosol valve and mounting cup assemblies for aerosol containers, comprising the steps of:
stamping mounting cups from a metallic sheet material;
orienting the mounting cups on a conveyor into a preferred orientation;
connecting each of the mounting cups to a terminal of an electrostatic coating device;
electrostatically coating a surface of the mounting cups with a resilient plastic coating to a thickness sufficient to provide a sealing gasket;
heating the mounting cups to cure the resilient plastic coatings;
cooling the coated mounting cups; and securing the aerosol valves to the electrostatically coated mounting cups.
stamping mounting cups from a metallic sheet material;
orienting the mounting cups on a conveyor into a preferred orientation;
connecting each of the mounting cups to a terminal of an electrostatic coating device;
electrostatically coating a surface of the mounting cups with a resilient plastic coating to a thickness sufficient to provide a sealing gasket;
heating the mounting cups to cure the resilient plastic coatings;
cooling the coated mounting cups; and securing the aerosol valves to the electrostatically coated mounting cups.
14. The method as set forth in claim 13, including the steps of:
reorientating the mounting cups on a conveyor into a second orientation;
connecting each of the mounting cups to a terminal of an electrostatic coating device; and electrostatically coating a second surface of the mounting cups with a protective coating.
reorientating the mounting cups on a conveyor into a second orientation;
connecting each of the mounting cups to a terminal of an electrostatic coating device; and electrostatically coating a second surface of the mounting cups with a protective coating.
15. The method as set forth in claim 13, wherein the step of orienting the mounting cup on the conveyor in a preferred orientation includes orienting the interior surface of the mounting cup to face vertically upwardly; and the step of electrostatically coating the mounting cup includes spraying the plastic material in a vertically downwardly direction enabling the force of gravity to interact with the electrostatic coating process to provide a thickened coating to the rim portion of the mounting cup.
16. The method of fabricating an aerosol fluid sprinkling device, comprising the steps of:
constructing an aerosol container;
stamping a mounting cup from a metallic sheet material;
electrostatically coating at least a portion of the mounting cup with a resilient plastic material;
heating the electrostatic coating to cure the resilient plastic material;
securing an aerosol valve to the mounting cup;
filling the aerosol container with an aerosol product:
securing the mounting cup to the aerosol container to form a seal therebetween with the resilient plastic material: and pressurizing the aerosol container.
constructing an aerosol container;
stamping a mounting cup from a metallic sheet material;
electrostatically coating at least a portion of the mounting cup with a resilient plastic material;
heating the electrostatic coating to cure the resilient plastic material;
securing an aerosol valve to the mounting cup;
filling the aerosol container with an aerosol product:
securing the mounting cup to the aerosol container to form a seal therebetween with the resilient plastic material: and pressurizing the aerosol container.
17. The method of fabricating an aerosol fluid sprinkling device, comprising the steps of:
stamping the mounting cup from a metallic sheet material;
electrostatically coating at least a portion of the mounting cup with a resilient coating;
heating the electrostatic coating to cure the resilient coating;
securing the valve assembly to the mounting cup;
filling the aerosol container with an aerosol product;
securing the mounting cup to the aerosol container to form a seal therebetween through the electrostatic coating; and pressurizing the aerosol container.
stamping the mounting cup from a metallic sheet material;
electrostatically coating at least a portion of the mounting cup with a resilient coating;
heating the electrostatic coating to cure the resilient coating;
securing the valve assembly to the mounting cup;
filling the aerosol container with an aerosol product;
securing the mounting cup to the aerosol container to form a seal therebetween through the electrostatic coating; and pressurizing the aerosol container.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US34107282A | 1982-01-20 | 1982-01-20 | |
| US42553782A | 1982-09-28 | 1982-09-28 | |
| US425,537 | 1982-09-28 | ||
| US341,073 | 1989-04-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1194005A true CA1194005A (en) | 1985-09-24 |
Family
ID=26992366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000422059A Expired CA1194005A (en) | 1982-01-20 | 1983-02-21 | Electrostatically sprayed mounting cup gasket |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0099401A1 (en) |
| CA (1) | CA1194005A (en) |
| WO (1) | WO1983002437A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1232581A (en) * | 1982-09-28 | 1988-02-09 | Michael G. Knickerbocker | Mounting cup and method of making |
| IT1223451B (en) * | 1987-11-24 | 1990-09-19 | Coster Tecnologie Speciali Spa | PROCEDURE FOR OBTAINING METALLIC BOTTLES PROTECTED FOR VALVES FOR AEROSOL AND SIMILAR |
| CA2087349C (en) * | 1990-07-18 | 2003-09-30 | Hans Hafner | Multi-layer gasket for an aerosol container closure |
| US5881929A (en) * | 1997-04-25 | 1999-03-16 | Summit Packaging Systems, Inc. | Plastic coated mounting cup for spray button seal |
| US6161599A (en) | 1999-04-15 | 2000-12-19 | Summit Packaging Systems, Inc, | Actuator with a longitudinal filling passageway communicating with each formed internal compartment |
| US6152190A (en) * | 1999-04-15 | 2000-11-28 | Summit Packaging Systems, Inc. | Actuator with resilient annular skirt for improved seal during button-on-filling process |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1373060A (en) * | 1918-06-08 | 1921-03-29 | American Can Co | Process of preparing sanitary can ends |
| US1843545A (en) * | 1929-02-08 | 1932-02-02 | Int Patents Dev Co | Packaging of liquids |
| US2047076A (en) * | 1934-05-11 | 1936-07-07 | Continental Can Co | Method of making a metal container for beer |
| GB562876A (en) * | 1941-04-10 | 1944-07-20 | Arthur Abbey | Improvements in or relating to containers particularly containers for beverages, foods and chemicals |
| US2965271A (en) * | 1956-12-27 | 1960-12-20 | Dev Res Inc | Valve body incorporating mounting cup mask and gasket |
| GB1111525A (en) * | 1964-06-18 | 1968-05-01 | Keyes Fibre Co | Thermoplastic coating of molded pulp |
| US3342381A (en) * | 1966-12-20 | 1967-09-19 | Grace W R & Co | Aerosol container closures with plastisol sealing gaskets |
| US3512685A (en) * | 1968-04-25 | 1970-05-19 | Seaquist Valve Co | Aerosol container |
| US3896602A (en) * | 1971-09-15 | 1975-07-29 | Tor H Petterson | Method of manufacturing of a barrier package |
| US3893882A (en) * | 1973-03-19 | 1975-07-08 | Natico Inc | Method for lining drums with plastic material |
| GB1558043A (en) * | 1976-02-03 | 1979-12-19 | Onoda Cement Co Ltd | Metal squeeze out tube and method and apparatus for forming a powder layer on its surface |
| FR2393665A1 (en) * | 1977-06-06 | 1979-01-05 | Rakovsky Oscar | Fitting items with thermoplastic covers by vacuum forming - so that the covers grip the base of the item |
| US4308973A (en) * | 1978-06-30 | 1982-01-05 | The Continental Group, Inc. | Compartmented aerosol container |
| FR2450758B1 (en) * | 1979-03-08 | 1986-01-17 | Valois Sa | VALVE MOUNTING DEVICE IN AN AEROSOL CONTAINER |
-
1983
- 1983-01-19 WO PCT/US1983/000083 patent/WO1983002437A1/en unknown
- 1983-01-19 EP EP19830900763 patent/EP0099401A1/en not_active Withdrawn
- 1983-02-21 CA CA000422059A patent/CA1194005A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| WO1983002437A1 (en) | 1983-07-21 |
| EP0099401A1 (en) | 1984-02-01 |
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