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Publication numberUS3667655 A
Publication typeGrant
Publication dateJun 6, 1972
Filing dateMar 30, 1970
Priority dateMar 30, 1970
Publication numberUS 3667655 A, US 3667655A, US-A-3667655, US3667655 A, US3667655A
InventorsKnieriem Herman Jr
Original AssigneeDow Chemical Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method for the rapid assembly of diptubes into spray cans and a diptube useful therein
US 3667655 A
Abstract
Method for the rapid assembly of long flexible diptubes into spray cans wherein the diptube is fixed into a coiled configuration prior to its insertion into the spray can and regains its normal shape after assembly.
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Description  (OCR text may contain errors)

United States Patent Knieriem, Jr.

[ 1 June 6,1972

[54] METHOD FOR TEE RAPID ASSEMBLY OF DIPTUBES INTO SPRAY CANS AND A DIPTUBE USEFUL THEREIN [72] Inventor:

[73] Assignee:

Herman Knieriem, Jr., Ballwin, M0.

The Dow Chemical Company, Midland, Mich.

[22] Filed: Mar. 30, 1970 [21] Appl. No.: 23,600

U.S. Cl ..222/464, 53/36, 138/177 ..B67d 5/60, B65b 3/04 Field of Search ..222/464, 1, 54, 402.1, 527, 222/530, 376; 206/46 H; 53/36; 138/110, 118, 177, 178

[56] References Cited UNITED STATES PATENTS 3,272,402 9/1966 Frangos ..222/1 X 2,117,747 5/1938 Smith et al.. ...222/527 X 2,978,152 4/1961 Batty ....222/402.1 3,189,669 6/1965 Goldfein 264/134 Primary Examiner-Robert B. Reeves Assistant E.mminer-Francis J. Bartuska Att0mey-Griswold & Burdick, Benjamin G. Colley and L. J. Dankert [57] ABSTRACT Method for the rapid assembly of long flexible diptubes into spray cans wherein the diptube is fixed into a coiled configuration prior to its insertion into the spray can and regains its normal shape after assembly.

12 Claims, 3 Drawing Figures PATENTEDJUH .6 m2 3. 667, 655

Hermon Kn Aerie/Y2 Jr.

METHOD FOR THE RAPID ASSEMBLY OF DIPTUBES INTO SPRAY CANS AND A DIPTUBE USEFUL TI'IEREIN BACKGROUND OF THE INVENTION Pressurized aerosol containers or cans have recently been developed for spraying diverse liquids and many different apparatus have been developed to hold the formulation to be sprayed in the aerosol can until it is released by the consumer.

It has long been a problem in the prior art to provide a flexible or limber diptube for these aerosol containers which will enable one to spray the contents from the discharge opening when the can is held in any position.

US. Pat. No. 2,978,152 to Batty illustrates the prior art wherein a long flexible diptube is provided with a weighted end so that the contents of the spray can can be expelled from the can in any position as well as when the contents are almost empty. However, these prior art spray cans having long limber diptubes are relatively hard to assemble on a production line since the operator must take a considerable amount of time to insert the diptube into the can. The present invention solves this problem by providing a long flexible diptube which is coiled prior to insertion into the can. Thus, the coiled diptube can be easily inserted into the spray can prior to the sealing operation and the production rate of the cans is thereby increased.

SUMMARY OF THE INVENTION The main object of the present invention is to provide an improved method for the rapid assembly of relatively long, flexible, weighted diptubes into a spray can prior to sealing thereof. A further object of the present invention is to provide a coiled diptube which is readily inserted into the spray can during the production of spray cans.

The steps of the present method consist of providing a long flexible diptube having a weighted end and a mounting cup on the opposite end, coiling said diptube intermediate the ends thereof to provide a diptube having adjacent coils in substantial contact, fixing said diptube in coiled relationship so that the diptube can regain its normal shape under suitable conditions after the can is sealed, inserting the coiled diptube into the spray can which is substantially filed with a sprayable liquid and finally sealing the mounting cup onto the spray can. The sealed spray cans are subsequently pressurized with a propellant inserted through the standard valve in the mounting cup. This latter operation is not a part of the present process.

A further object of the present invention is to provide a diptube for use in spray cans which comprises a flexible plastic tube formed into a predetermined number of contiguous coils and means for holding the coils together which is soluble in the contents of said spray can and which is inert to said content.

A still more specific object of the present invention is to provide a coiled diptube for use in spray cans wherein the coil is held together with soluble adhesives or soluble plastic ribbons which form a closed loop around the axial length of said coils.

DETAILED DESCRIPTION The present invention is illustrated by the drawing in which FIG. 1 illustrates the sub-assembly of the mounting cup, the coiled diptube and the weighted end.

FIG. 2 illustrates the complete assembly of the elements of FIG. 1 into the final spray can with its contents and propellent after the diptube has uncoiled.

FIG. 3 is an enlarged fragmentary cross-section of the coils of the diptube with the coils held together by a plastic ribbon.

In FIG. 1 the normally long flexible diptube l is shortened by providing a plurality of coils as shown. One end of the diptube is secured in a standard mounting cup 4 having an internal valve. The other end is secured in a weight 3 which can be made from any relatively heavy, inert, substance such as metal, glass, or ceramics. The coils are held together in this illustration by a dried or set adhesive 2 to provide the subassembly.

In FIG. 2, the flexible diptube 1 is shown after the coils have been uncoiled inside the pressurized container 5 to provide the final assembled spray can. The sprayable contents 6 are pressurized by a standard propellent shown at 7.

In FIG. 3, the coiled diptube l is held in place until it is assembled into the spray can by one or more soluble plastic ribbons 8 which are tied or heat sealed about the axial length of the coiled diptube.

In practicing the method of this invention, the long flexible diptube is wound on a rod having the desired diameter and temporarily fixed into this coiled configuration by freezing it in an ice bath or other low temperature fluids, tying it with soluble plastic ribbons, or applying a soluble adhesive.

It is essential that if adhesives or plastic ribbons are used that they be readily soluble in the contents to be dispensed and at the same time be inert to the active ingredients thereof. This can be readily ascertained by a simple test with each sprayable formulation prior to the insertion of the coiled diptubes. For sprayable formulations using a large amount of water or lower alkanols, it has been found that plastic ribbons or adhesives made from cellulose ethers such as methyl cellulose and ethyl cellulose are satisfactory. Likewise, polyvinyl alcohol adhesives are operable. Other plastic ribbons or adhesives can be readily found by those skilled in the art for different formulations.

Any of the normal propellents such as the Freons or lower hydrocarbons such as isobutane can be used as the propellents in the present invention since these materials are inert to the sprayable formulations.

As a specific illustration of the invention, commercial aerosol valves assembled with their mounting cups and long flexible polyethylene diptubes are each provided with a cylindrical weight on the end of the diptubes. The tubes are then coiled over a cylindrical form and tied together with ribbons ofsoluble plastic such as ethyl cellulose and methyl cellulose.

The coiled diptubes are then placed in open cylindrical spray cans having diameters of 2 1 1/16 inches and lengths of 6 inches, partially filled with 420 grams of a sprayable liquid formulation, crimped in place, pressurized with a propellent and given three shakes. The following table gives the time in which it took the metal weight to contact the bottom of the Composition consists substantially of methanol with polymerized trimethyl quinoline dissolved therein. See patent 3,271,170.

" Composition consists substantially of water with minor amounts of surfactants and chelating agents dissolved therein.

The above cans are used to spray the contents thereof and it is found that they spray well in all positions with no change in the spray pattern in any position. This indicates that the soluble tying ribbons are compatible with the contents and do not interfere with the spraying function.

Similar results to the foregoing are obtained when the coiled diptubes are glued together with an adhesive made from methyl cellulose, ethyl cellulose or polyvinyl alcohol, and are dried in contiguous relationship prior to their insertion into the spray cans.

I claim:

1. A method for the rapid assembly of relatively long, flexible, weighted diptubes into a spray can substantially filled with a sprayable liquid prior to the sealing thereof, the steps which comprise providing a long flexible diptube with a weighted end, and

a mounting cup on the opposite end,

2. coiling said diptube intermediate the ends thereof, to provide a coiled and shortened diptube having adjacent coils in substantial contact,

. fixing said diptube in coiled relationship with a holding means which is soluble in the contents to be dispensed in said spray can and which is compatible with the contents and does not interfere with the spraying function of said spray can,

4. inserting said coiled diptube into said substantially filled spray can, and

5. sealing said mounting cup onto said spray can.

2. The method as set forth in claim 1 in which the holding means is a soluble adhesive.

3. The method as set forth in claim 1 in which the holding means is at least one soluble plastic ribbon disposed axially about the coils of said diptube.

4. The method as set forth in claim 1 in which the sprayable liquid is selected from the group consisting of water based compositions and lower alkanol based compositions and the holding means is an adhesive selected from the group consisting of cellulose ether adhesives and polyvinyl alcohol adhesives.

5. The method as set forth in claim 1 in which the sprayable liquid is selected from the group consisting of water based compositions and lower alkanol based compositions and the holding means is a ribbon of cellulose ether.

6. A diptube for use in spray cans comprising a flexible plastic tube formed into a predetermined number of contiguous coils, and means for holding said coils together which is soluble in the contents of said spray cans and which is compatible with the contents and does not interfere with the spraying function of said spray cans.

7. A diptube as set forth in claim 6 in which the means for holding said coils together is a soluble adhesive.

8. A diptube as set forth in claim 6 in which the means for holding said coils together is at least one plastic ribbon forming a closed loop around the axial length of said coils.

9. A diptube as set forth in claim 6 which comprises, in addition, a weighted end.

10. A diptube as set forth in claim 9 in which weighted end comprises a metal body through which said tube passes and is permanently affixed.

l 1. A diptube as set forth in claim 6 which comprises, in addition, a mounting cup on one end thereof adapted to retain said diptube in operative relationship after said mounting cup is sealed onto said spray can.

12. A diptube as set forth in claim 9 which comprises, in addition, a mounting cup on the end remote from said weighted end whereby said mounting cup is adapted to retain said diptube in operative relationship after said mounting cup is sealed onto said spray can.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2117747 *Jun 26, 1936May 17, 1938Cohn David JMilk-dispensing device
US2978152 *Jan 15, 1959Apr 4, 1961Batty Edward GAerosol can
US3189669 *Nov 1, 1962Jun 15, 1965Goldfein SolomonProcess for shipping flexible polyurethane foam
US3272402 *Dec 24, 1963Sep 13, 1966Revion IncAerosol dispensing apparatus
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5381961 *Jan 7, 1993Jan 17, 1995Evans; Robert M.Liquid dispensing devices
US5397034 *Sep 13, 1993Mar 14, 1995Wunsch; EckartFinely atomizing device for fluids
US5558518 *Aug 10, 1993Sep 24, 1996Novadent Ltd.Oral hygiene irrigator syringe bulb
US5611467 *May 7, 1996Mar 18, 1997Peng; Karl K.Invertible pressurized fluid dispenser with guided fluid inlet member
US5636770 *Apr 26, 1995Jun 10, 1997Toyo Aerosol Industry Co. Ltd.Aerosol dip tube
US5755572 *Aug 30, 1996May 26, 1998Novadent Ltd.Oral hygiene irrigator syringe bulb
US5839620 *Mar 27, 1997Nov 24, 1998Guala Dispensing S.R.L.Atomizer with suction tube provided with ballast weight
US5934519 *Nov 17, 1997Aug 10, 1999Kim; Hee SooWeighted dip tube
US6027041 *Nov 10, 1992Feb 22, 2000Evnx Technologies, Inc.Sprayer with swiveling spray head
US6202943 *Jan 13, 1995Mar 20, 2001Evnx Technologies, Inc.Liquid dispensing devices
US6502766Jul 24, 2000Jan 7, 2003The Procter & Gamble CompanyLiquid sprayers
US6752330Jul 23, 2001Jun 22, 2004The Procter & Gamble CompanyLiquid sprayers
US6779693Dec 20, 2002Aug 24, 2004Saint-Gobain Calmar Inc.Weighted dip tube for a manual dispenser
US6935542May 15, 2002Aug 30, 2005S. C. Johnson & Son, Inc.Device for retaining and for inserting a flexible tube assembly into a fluid container
US6969046Oct 28, 2002Nov 29, 2005The Procter & Gamble CompanyVenting mechanism
US6981658Oct 28, 2002Jan 3, 2006The Procter & Gamble CompanyLiquid sprayers
US7097119Apr 27, 2004Aug 29, 2006Cepia, LlcPower sprayer
US7240810Sep 4, 2003Jul 10, 2007S.C. Johnson & Son, Inc.Flexible supply tube with weighting mechanism for use in spray bottles
US7246755Sep 22, 2005Jul 24, 2007Cepia, LlcPower sprayer
US7328859Jun 8, 2004Feb 12, 2008Cepia, LlcPower sprayer
US7384006Aug 25, 2004Jun 10, 2008Cepia, LlcPower sprayer
US7562834Jul 21, 2009S. C. Johnson & Son, Inc.Power sprayer
US7568637Mar 29, 2007Aug 4, 2009S.C. Johnson & Son, Inc.Power sprayer
US7588198Aug 9, 2004Sep 15, 2009S.C. Johnson & Son, Inc.Power sprayer
US7648083Aug 8, 2008Jan 19, 2010S.C. Johnson & Son, Inc.Power sprayer
US8602386Dec 21, 2007Dec 10, 2013S.C. Johnson & Son, Inc.Valve with actuator assist
US20030042330 *Oct 28, 2002Mar 6, 2003The Procter & Gamble CompanyLiquid sprayers
US20030213816 *May 15, 2002Nov 20, 2003Kevin HarrityDevice for retaining and for inserting a flexible tube assembly into a fluid container
US20040056052 *Jul 10, 2003Mar 25, 2004Verzino Anthony JohnWeighted fluid extraction tube
US20040089674 *Sep 4, 2003May 13, 2004S.C. Johnson & Son, Inc.Flexible supply tube with weighting mechanism for use in spray bottles
US20050133624 *Aug 9, 2004Jun 23, 2005Hornsby James R.Power sprayer
US20050133626 *Apr 27, 2004Jun 23, 2005Hornsby James R.Power sprayer
US20050133627 *Aug 25, 2004Jun 23, 2005Hornsby James R.Power sprayer
US20060076434 *Sep 22, 2005Apr 13, 2006James Russell HornsbyPower sprayer
US20070228186 *Mar 29, 2007Oct 4, 2007Cepia, LlcPower sprayer
US20080237371 *Jun 10, 2008Oct 2, 2008Cepia, LlcPower sprayer
US20090159723 *Dec 21, 2007Jun 25, 2009Cepia, LlcValve with actuator assist
US20100140303 *Dec 8, 2008Jun 10, 2010Henry George BaglinSelf-adjusting weighted fluid pick-up head for use with a standard fluid extraction tube associated with a spray bottle
DE102004007736A1 *Feb 16, 2004Sep 1, 2005Ernestine GlienickePump or spray head for a pump or aerosol spay has a riser tube with a heavy end that is wound around a rigid shaft before it is placed in the storage container at which point a hook is released and the tube unravels
EP0592082A1 *Aug 10, 1993Apr 13, 1994Itai BabImproved oral hygiene irrigator syringe bulb
EP0687639A1 *Apr 28, 1995Dec 20, 1995Toyo Aerosol Industry Co., Ltd.Aerosol dip tube
EP0798049A1 *Mar 27, 1996Oct 1, 1997Guala Dispensing S.R.L.Atomizer with suction tube provided with ballast weight
WO1999025645A1 *Nov 17, 1998May 27, 1999Heesoo KimFlexible straw
WO2000053527A1 *Mar 8, 2000Sep 14, 2000Precision Valve CorporationAerosol valve dip tube with spring weight
Classifications
U.S. Classification222/464.4, 53/470, 138/177
International ClassificationB65D83/14
Cooperative ClassificationB65D83/32
European ClassificationB65D83/32