US3058669A - Method and apparatus for dispensing - Google Patents

Description

Oct. 16, 1962 DRELL METHOD AND APPARATUS FOR DISPENSING Filed March 20, 1961 United States Patent O 3,058,669 METHOD AND APPARATUS FOR DISPENSING Leonard Drell, 911 @ak Drive, Glencoe, Ill. Fired Mar. zo, 1961, ser. No. 96,766 11 Claims. (Cl. 239-308) This invention relates to the dispensing of hair and/or scalp preparations, namely hair setting and/or styling lotions, hair conditioners, scalp lotions, hair coloring preparations, hair cleansing preparations and hair finishing iixatives, from an aspirator system. The results of the present invention are achieved by the conjoint and cooperative control of viscosity of the hair and scalp preparation, density of the propellant employed, pressure of the said propellant, and orifice sizes in the aspirator system.

The hair and scalp preparations are dispensed from the aspirator-type apparatus wherein gas is maintained under pressure separate from and out of contact with the hair and scalp preparation luntil the moment of discharge in the form of a soft, mist-'like spray.

The aspirator system comprises a container for regenerative liquitied propellant gas under pressure and a separate holder enclosing the hair and -scalp preparation to be dispensed. The preparation is expelled lfrom its holder through a product oriiice positioned adjacent a gas discharge orifice -that communicates with the propellant container. The propellant (in the form of gas) which passes out the gas discharge orifice creates the desired spray by atomizing the hair and scalp preparation in the gas flow.

Unlike the aerosols dispensed by conventional self-contained propellant-product combinations, the material dispenscd by an aspirator system in accordance with the present invention contains no propellant in liquid form. The separate container for liquied propellant insures discharge of only dry, gaseous propellant. This is highly advantageous for Ithe reasons pointed out below.

It i-s known in the art that various liquids can be dispensed if the gaseous mediums or liquified propellants are mixed with and/or dissolved in the material to be dispensed or sprayed. Insecticides, paints, hair preparations and other products are commonly sold in the form of -selfcontained spray cans having suiiicient strength to hold the propellant-product mixture under a pressure so that the product may be dispensed in a variety of manners, including aerosols. In these systems the propellant-product mixture is held under a pressure of lat least 35 p.s.i. gauge at 70 F., and usually higher. When such systems have employed propellants at lower pressures to eject liquids from their containers, the products are not atomized in droplet form.

Propellant-product mixtures capable of being dispensed in aerosol form must be carefully formulated so that they represent a balance of proper-ties dictated by the requirements of the container and properties desirable in the product. The mixture, for example, must not be corrosive to lmetal and deteriorate a container -which is under appreciable internal pressure. Propellant and product must be compatible so that upon storage, the product will not be subject to gelation to a viscosity interfering with the dispensing thereof. Such problems drastically limit the number and types of materials useful as propellants, solvents, and the like. In addition, where a compatible combination has been sold as a single container item, it has been necessary to purchase a different pressurized package for each different job. Most of such products are used to only a partial extent of the capacity thereof and then are stored for future use.

In addition to the general problems associated with self-propelled products heretofore available commercially, speciiic applications Lhave presented problems of a unique nature. In the dispensing of self-contained hair finishing fixatives, `for example, from commercially available aero- 3,058,669 Patented Oct. 16, 1962 sol containers operating under a pressure of about 40 p.s.i. or higher, it is necessary to discharge the material at a substantial distance from the hair to avoid such problems as displacement of the hair, deposition of too great a quantity of material in localized areas, and contac-t of entrained liquid droplets or" propellant with the skin of the subject. When the distance from the discharge nozzle to the deposition area is great enough (say, l5 to 20 inches) to avoid these objectionable effects, much of the preparation is lost in the air without reaching the hair, resulting in substantial loss Iand waste of material.

Aspirator systems for the `discharge of various materials have likewise 4been known to the art, but none of such systems have employed the conjoint and `cooperative control of propellant density, propellant pressure and orifice sizes in connection with the dispensing of hair and scalp preparations of specific viscosities, and which achieve the particular advantages of the present invention.

Thus, in accordance with the present invention, one may dispense a maximum amount of a hair and sca-lp preparation with a minimum of loss, at -a minimum of cost, and in a manner avoiding lthe general and specific problems enumerated above with regard to conventional aerosol dispensing of such materials. For example, when dispensing hair nishing fxatives, in accordance with this invention, in the form of a soft, mist-like spray, the discharge orifice may be held 'within a few inches of the subjects head without disturbing the hair, thereby insuring eiiicient deposition of material and avoiding contaminating the air with materials which -are often odorous or Otherwise objectionable.

Novel features and advantages of the present invention will appear from the following description of the method of operation and of a preferred embodiment of an apparatus employed in accordance with the invention as shown in the accompanying drawings, in which:

FIGURE l is an elevational View of a preferred form of apparatus;

FIG. 2 is a top plan View of the assembly shown in FIGURE l;

FIG. 3 is a perspective view of the underside of the plate mem-ber and a secured screw cap yfor the material holder; and

FIG. 4 is a fragmentary cross-sectional view of a cap for a holder, with the discharge unit mounted thereon.

Referring to the drawing, a conventional propellant container 10 of the depressed type, such as shown in the -Drelfl Patent No. 2,806,739, and having a top rim, is provided with a gas release mechanism or button 12 having a gas discharge nozzle 13. The gas release mechanism has a plunger 14 engageable with a conventional dis.- pensing valve (not shown) in the propellant container to cause pressurized propellant gas to -iiow from the container to the gas release nozzle 13. A removable gas release mechanism is desired because of the advantage it affords in connection with the interchangeability of the material holder 25 and the replacement of used pro.- pellant containers 10.

A tubular member 15 has one end tightly fitted over the gas release nozzle 13 as indicated at 16 and the other end tightly fitted to a projection having an aperture therethrough on a discharge unit hereinafter described in detail. Tubular member 15 is made of liexible material, such as polyethylene, rubber or other suitable material that is chemically inert to the propellant gas. It will be manifest that, if the gas release mechanism 12 is removable rfrom the container, it will not be necessary to remove tubular member 15 from the nozzle 13 in order to attach a new propellant container l0 when the original propellant container becomes exhausted. The length of the flexible tube is preferably such that when the assembly is completed, the spacing of material holder 25 from the propellant container causes a slight axially directed pressure to be exerted against the end of the exible tube, i.e., the length of the flexible tube causes it to be under longitudinally directed compressing force to counteract the pressure of the gas which tends to break the tube loose from its fittings during operation of the apparatus.

A mounting member 18, preferably of unitary construction, is formed of a metal plate 19 adapted with suitable means for attachment to the propellant container. Such means preferably consists of a flange 21 adapted to tit the outer periphery of the top rim of the con- 'tainer 12 working in cooperation with clips, such as diametrically opposed clips 22 and 23 adapted to contact the inner surface of the rim. Clips 22 and 23 are preferably formed integral with the plate 19, but may be separate units secured to said plate by such means as welding.

Plate 19 has a section 24 adapted to overlay a portion of a closure means for material holder 25 such as a screw cap 26. Cap 26 is provided with an annular sealing gasket 27 and a vent 28 to maintain normal atmospheric pressure inside the material holder during operation. Cap 26 is secured to mounting member 18 by suitable means, such as rivets 29.

Cap 26 carries a discharge unit 30. The discharge unit is preferably made of unitary construction, e.g., a metal casting, but may be formed from other material such as molded plastic. Discharge unit 3G comprises a bottom portion 31 having a projection 32 which passes through an aperture 33 in the cap 26. Dispensing unit 30 also has a projection 34 which passes through an aperture 35 in the cap spaced from aperture 33, and an extension 36 thereof of lesser outside diameter than projection 34. The lower ends of projection 32 and of the projection 34 are peened over the adjacent edge of the cap, as indicated at 37 and 38, respectively. A dip tube 39 is secured to the lower end of extension 36 and extends downwardly to a position adjacent the bottom of the material holder to insure removal of all of the material therefrom.

Discharge unit 30 has a horizontal gas core 40 and a restricted gas discharge outlet 41 which forms a gas passageway. Unit 30 also has a product passageway formed by a vertical product core 43 and a restricted product outlet 44 terminating in an enlarged tip 46 having a concave upper surface. Unit 30 is provided with a notch 42 to provide adequate spacing 4between the gas outlet and the product outlet. Notch 42 provides sutiicient area for gas to tiow over the top and along the 'lateral sides of the tip 46.

The dispensing assembly has the following mode of operation. Mounting member 19 which carries button 12, tube 15, cap 26, discharge unit 30 and dip tube 39 is secured to the propellant container as above described. Product holder containing a hair and scalp preparation is threaded to the cap 26. Downward pressure on button 12 causes gaseous propellant to flow through nozzle 13, tube 1S, discharge unit 30, and outward through the gas outlet 41. The flow of gas creates a vacuum drawing the product up the dip tube 39, through core 43 and product outlet 44 and into the concave portion of tip 46, whereupon the gas flowing around the tip 46 causes the product to be atomized and sprayed in a desired pattern.

The manner of construction of the unitary discharge mechanism is important -for proper operation, both with respect to the individual features thereof and the effectiveness of each in the entire combination of elements of the preferred aspirator apparatus.

An important feature in this regard is the unitary construction of the discharge unit which has a generally vertical product outlet and a transversely positioned gas outet in a predetermined and fixed relationship. This relationship is maintained constant by the unitary structure which includes within the single unit both the transversely positioned gas discharge outlet and the upper end of the product outlet to prevent change in relative positioning.

Such a construction avoids problems created when two 5 separate tubes are employed whose relative positions may be altered by conditions of normal use. Even in situations where two tubes are embedded in rigid material, for instance metal tubes held in plastic or dissimilar metals, the position of the tubes may alter due to different coetlicients of expansion or loosening from the carrying member. Such altering of positioning usually results in va distortion of spray pattern and may at times cause the unit to cease functioning altogether.

The provision of relatively large core portions which terminate closely adjacent each outlet allows for the simple control of orifice size. When the discharge unit is cast or molded, the core portions are formed, but the restricted gas outlet and restricted product outlet are not. To obtain the desired orifice size, it is merely necessary to drill or puncture such orifices with tools of predetermined diameter.

ln the present invention, the aforementioned preparations for application to hair and/ or scalp can be dispensed in the desired soft, mist-like spray from the aspirator system without the objectionable effects as described herein in connection with conventional spraying methods. As indicated, this is possible because of the control of (l) propellant pressure, (2) propellant density, (3) oritice sizes and (4) viscosity of the preparation utilized.

I have discovered that materials useful as propellants for the puiposes of this invention are regenerative liquid gases which have a specific range of density and exert, either singly or in combination, a gas pressure of less than p.s.i. gauge at 70 F. Preferably, the pressure of the gas is in the range between 13 pounds and 3Q. pounds per square inch. When the propellants are employed as mixtures, it is necessary that the liquids change to the gaseous state in proportions such that when gas under an eiiective pressure is exhausted, there is substantially no residue consisting of an unvaporized liquid portion of either one or more components of the mixture.

With regard to propellant density, I have also discovered that dry gas discharging from the gas discharge orifice at the previously mentioned pressures must be capable of creating sutiicient vacuum at the product outlct to lift preparations of proper viscosity to the product orifice. Regenerative liquid gas propellants, in order to provide effective dispensing in accordance with this invention have a liquid density in excess of 85 lbs. per cubic foot at 70 F.

Useful propellants are some of the fluorinated or chlorfluorinated hydrocarbons, such as 1,1-ditiuorethane, lmonochlor, 1,1-diiiuorethane, monotluortrichlormethane, monochlorditiuormethane, dichlorditluormethane, 1,2-dichlor-l,1,2,2-tetratiuorethane, and the like, or mixtures thereof which satisfy the above-mentioned conditions of pressure and density. For some uses, hydrocarbon propellants such as propane or isobutane or chlorinated hydrocarbons such as ethyl chloride, may be admixed with the fiuorine-bearing hydrocarbons, so long as the proper pressure and density conditions are satisfied.

The preferred propellant of the present invention comprises a mixture of dichlorditiuormethane, and dichlorotetrafluorethane. The combination is preferably a mixture of 20% dichlordiiiuoromethane and 80% dichlor tetrafluorethane, but may contain as much as about dichlordifluoromethane. The preferred 20w80 mixture exerts a dry gas pressure of about 28 p.s.i. gauge and has a liquid density of about 90.5 pounds per cubic foot at F.

Propellants, such as the above described combination, when held in a container separate from the material to be dispensed, have the advantage that only a dry gas is dispensed and droplets of liquid, i.e., unvaporized propellant, do not escape from the propellant container.

Liquid propellant, which ordinarily escapes from conventional self-contained aerosol preparations, frequently have a deleterious eect on the hair and/ or scalp.

When the aspirator is operated, propellant is released in the form of a dry gas through the gas discharge orifice positioned adjacent and at substantially a right angle to the product orifice. Unless the size of each oritce is properly controlled, the hair and scalp preparation will either not be dispensed at all, or will not be dispensed in the desired soft, mist-like spray.

A propellant of pressure and density above-mentioned will atomize hair and/or scalp preparations of proper viscosity into a spray of the desired character if the gas orifice has a diameter in the range between 0.13 inch and 0.03 inch. When the size of the gas orifice is outside these limits, the spray patterns are unsatisfactory and the atomizing operation becomes ineicient.

I have further discovered that in order `for the hair and scalp preparations to be dispensed in the desired, soft, mist-like spray, the product orice cooperating with the above described gas orifice should have a diameter in the range between 0.014 inch and 0.060 inch. The product orice size may be varied within the above limits to provide a particular spray pattern, a spray of particular droplet size, a spray of a desired amount of product, etc. for a liquid product of specific viscosity. One factor entering into the determination of the desired product orifice size is the positioning of the outlet vertically relative to the longitudinal axis of the horizontal gas outlet. In general, if the tip of the product outlet is below the longitudinal axis of a horizontal gas outlet, the product orifice size may be larger than is used, for example, when the tip of the product outlet is in line with the longitudinal axis of the gas outlet.

It is also necessary that the hair and scalp preparation employed in the present invention have a viscosity in the range between 9.7 seconds and 55 seconds at 70 F. as measured in a No. 4 Ford cup. If the preparation has a viscosity outside the above range, atomization is unsatisfactory due to either entrainment of excessive quantities of low viscosity materials or uneven discharge of high viscosity materials.

The advantages of the present invention may be illustrated by comparing procedures heretofore used in a typical beauty salon operation with a procedure employing this invention. In such prior art operations, the hair of a subject was first shampooed. While the hair was still damp and after arranging the hair in curlers, setting and/or styling lotion, if applied by a spraying operation, was sprayed onto the hair from a plunger type or squeeze type atomizer. Conventional self-propelled setting and/ or styling lotions could not be utilized in the prior art self-contained aerosol devices because of the incompatibility of such lotions with the propellants ernployed and corrosive effects on containers. After adding the setting and/ or styling lotion, the hair was dried and combed in the desired manner. Hair finishing fixative was then applied from a self-contained aerosol dispenser, such application having the objectionable effects abovedescribed.

In accordance with this invention, any of the aforementioned hair and scalp preparations can be applied to the hair of the subject, each in the `form of a soft, mistlike spray, by attachment of the separate holder for the desired preparation in the aspirator system at the appropriate time.

Dispensing of hair and scalp preparations in accordance with this invention is markedly more eicient than with conventional self-contained aerosol dispensing. For example, utilizing a product discharge orifice of about 0.030 inch in diameter and a gas discharge orifice of about 0.02 inch in diameter, and 12 avoirdupois ounces of a propellant consisting of 80% dichlortetrauorethane and 20% dichlordifluorethane which exerts an initial pressure of about 28 p.s.i. gauge, 26 liquid ounces of a hair finishing ixative having a viscosity of about 1l seconds at 70 F. measured in a No. 4 Ford cup can be dispensed in a soft, mist-like spray `by 300 six second applications of ixative at three minute intervals at room temperature.

A propellant container holding l2 ozs. of a propellant mixture consisting of dichlortetratluorethane and 15% dichlordiiluormethane will provide over 34 minutes of spraying time for a hair fixative preparation and will dispense about 26 liquid ozs. of this material having a viscosity of about 12 seconds in a No. 4 Ford cup at 70 F. through a product orifice of 0.020 inch in diameter. The solids concentration of such a composition in the 26 ozs. dispensed may be twice the lsol-ids concentration usually dispensed in conventional `self-contained aerosol dispensers. The performance described is equivalent to the discharge of material from nine to twelve convention-al self-contained aerosol dispensers of hair ixative preparation.

Although I have described a preferred embodiment of the present invention, it will ybe understood that the description is intended to be illustrative, rather than restrictive, as details may be modified or changed without departing from the spirit or the scope of the invention. Accordingly, I do not desire to be restricted to the exact description herein.

I claim:

1. A method of dispensing a preparation for application to the hair and/ or scalp in an aspirator system which comprises discharging dry propellant gas from a container holding liquified propellant, said liquiled propellant having a density greater than 85 lbs. per cubic foot and exerting a pressure of less than 35 pounds per square inch gauge at 70 F., directing said gas through a gas discharge outlet of a diameter in the range between 0.013 and 0.03 inch, said gas emerging from said gas discharge outlet serving to envelop a preparation outlet communicating with a holder for a said preparation, said preparation having a viscosity in the range between 9.7 seconds and 55 seconds measured in a No. 4 Ford cup at 70 F., said product outlet having `a diameter in the range between 0.014 and 0.060 inch, whereby the flow of gas serves to atomize said preparation and causes it to be dispensed in the form of a soft, mist-like spray.

2. A method of dispensing a hair finishing fix-ative in an aspirator system which comprises discharging dry propellant Igas from a container holding liquified propellant, said liquiiied propellant having density greater than 85 lbs. per cubic foot `and exerting a pressure of less than 35 pounds per square inch gauge at 70 F., directing said gas through a gas discharge outlet of a diameter in the range between 0.013 and 0.03 inch, said gas emerging from said gas discharge outlet serving to envelop a iixative out- -let communicating with a holder for said hair nishing ixative, said xative having a Viscosity in the range ibetween 9.7 seconds and 55 seconds in a No. 4 Ford cup at 70 F., said hair finishing xative outlet having a diameter in the range between about 0.0114 and about 0.060 inch, whereby the ilow of gas serves to atomize said preparation and causes yit to be dispensed inthe form of a soft, mist-like spray.

3. A method of dispensing a hair setting lotion in an aspirator system which comprises discharging dry propellant gas from a container holding liquied propellant, said liquiied propellant having density greater than 85 lbs. per cubic foot and exerting a pressure of less than 35 pounds per square inch gauge at 70 F., directing said gas through a gas discharge outlet of a diameter in the range between about 0.013 and about 0.03 inch, said gas emerging from said gas discharge outlet serving to envelop a lotion outlet communicating with a holder for said hair setting lotion, said lotion having ya viscosity in the range between 9.7 seconds and 55 seconds measured in a No. 4 Ford Icup at 70 F., said hair setting -lotion outlet having a diameter in the range between about 0.014 and aboutV 0.060 inch, whereby the ow of gas serves to atomize said preparation and causes it to be dispensed in the form of a soft, mist-like spray.

4. A method of dispensing a hair preparation for application to hair and/or scalp in an aspirator system which comprises discharging dry propellant gas from a container holding the liquitied propellant, said liquied propellant having a density greater than 85 lbs. per cubic foot and exerting a pressure in the range lbetween 13 pounds and 32 pounds per square inch gauge, directing said gas through a gas discharge outlet of a diameter in the range between about 0.013 and about 0.03 inch, said gas emerging from said gas discharge outlet serving to envelop a preparation outlet communicating with a holder for said preparation, said preparation having a viscosity in the range between 9.7 seconds and 55 seconds measured in a No. 4 Ford cup at 70 F., said preparation outlet having a diameter in the range between about 0.014 and about 0.060 inch whereby the ow of gas serves to atomize said preparation and cause it to be dispensed in the form of a soft, mist-like spray.

5. A method of dispensing a preparation for application to hair and/ or scalp in an aspirator system which comprises discharging dry propellant gas selected from the group consisting of fluorinated hydrocarbons and chloriiuorinated hydrocarbons Iand mixtures thereof from a container holding liquitied propellant, said liquiiied propellant having a density greater than 85 lbs. per cubic foot and exerting a pressure of less than 35 pounds per square inch gauge at 70 F., directing said gas through a gas discharge outlet of a diameter in the `range of 0.013 and 0.03 inch, said gas emerging from said gas discharge outlet serving to envelop said preparation outlet communicating with a holder for said preparation, said preparation having a viscosity `in the range between 9.7 seconds and 55 seconds measured in 4a No. 4 Ford cup at 70 F., said product outlet having a diameter in the range between 0.014 and 0.060 inch, whereby the flow of gas serves to `atomize said preparation and causes it to be dispensed in the `form of a soft, mist-like spray.

6. A method of dispensing hair preparation in an aspirator system which comprises discharging gaseous propellant from a container holding a liquied mixture comprising by weight of dichlordiluormethane and 80% iby weight of dichloro tetrafluoroethane, directing said gas through a gas discharge outlet of a diameter in the range between 0.013 and 0.03 inch, said gas emerging from said gas discharge outlet serving to envelop a preparation outlet communicating with a holder for a said preparation, said preparation having a viscosity in the range between 9.7 seconds and 55 seconds measured in a No. 4 Ford cup at 70 F., said product outlet having a diameter 4in the range between 0.014 and 0.060 inch, whereby the ilow of gas serves to atomize said preparation and causes it to be dispensed in the form of a soft, mist-like spray.

7. A dispensing assembly for a preparation for application to hair and/or scalp having a viscosity between 9.7 seconds and 55 seconds measured in a No. 4 Ford cup at 70 F. comprising in combination a propellant container adapted to contain a regenerative liquiiied gas having a density greater than 85 lbs. per cubic foot and exerting a pressure less than pounds per square inch gauge at 70 F., a gas release nozzle projecting from a valve on said container, a holder for said preparation, a unitary discharge unit having a passageway for said preparation and a transversely positioned gas passageway, said passageway for said preparation being in communication with said holder and being adapted to have said preparation ow therethrough, said passageway for gas being in communication with said propellant container and being adapted to have dry gas ow therethrough, said passageways having outlets positioned in predetermined spaced relationship, said outlet for said preparation having a size in the range between 0.014 and 0.060 inch in diam- Cil 8 eter, said gas outlet having a size in the range between 0.013 and 0.03 inch in diameter, said discharge unit having a notch between the outlet for said gas passageway and the outlet for said preparation to enable gas flowing outwardly from said gas outlet to expand and liow around said outlet for preparation, a mounting member releasably secured to said propellant container and having said holder releasably secured thereto in a position providing for side-by-side positioning of said container and said holder `and a flexible tube connecting said gas discharge nozzle to said transversely positioned gas passageway.

8. A dispensing assembly for a preparation for application to hair and/or scalp having a viscosity between 9.7 seconds and 55 seconds measured in a No. 4 Ford cup at 70 F. comprising in combination a propellant container adapted to contain a regenerative liquilied gas having a density greater that lbs. per cubic foot and exerting a pressure in the range between 13 pounds per square inch and 32 pounds per square inch gauge, a gas release nozzle projecting from a valve on said container, a holder for said preparation, a unitary discharge unit having a passageway for said preparation and a transversely positioned gas passageway, said passageway for said preparation being in communication with said holder and being adapted to have said preparation ow therethrough, said passageway for gas being in communication with said propellant container and being adapted to have dry gas flow therethrough, said passageways having outlets positioned in predetermined spaced relationship, said outlet for said preparation having a size in the range between 0.014 and 0.060 inch in diameter, said gas outlet having a size in the range between 0.013 and 0.03 inch in diameter, said discharge unit having a notch between the outlet for said gas passageway and the outlet for said preparation to enable gas owing outwardly from said gas outlet t0 expand and flow around said outlet for preparation, a mounting member releasably secured to said propellant container and having said holder releasably secured thereto in a position providing for side-by-side positioning of said container and said holder and a flexible tube connecting said gas discharge nozzle to said transversely positioned gas passageway.

9. A dispensing assembly for preparation for application to hair and/or scalp having a viscosity between 9.7 seconds and 55 seconds measured in a No. 4 Ford cup at 70 F. comprising in combination a propellant container adapted to contain a regenerative liquied gas having a density greater than 85 lbs. per cubic foot and exerting a pressure less than 35 pounds per square inch gauge at 70 F., a gas release nozzle projecting from a valve on said container, a holder for said preparation, a unitary discharge unit having a vertically disposed passageway for said preparation and a horizontally positioned gas passageway, said passageway for said preparation being in communication with said holder and being adapted to have said preparation ow therethrough, said passageway for gas being in communication with said propellant container and being adapted to have dry gas flow therethrough, said passageways having outlets positioned in predetermined spaced relationship, said outlet for said preparation having a size in the range between 0.014 and 0.060 inch in diameter, said gas outlet having a size in the range between .0.013 and 0.03 inch in diameter, said discharge unit having a notch between the outlet for said gas passageway and the outlet for said preparation to enable gas owing outwardly from said gas outlet to expand and ow around said outlet for preparation, a mounting member releasably secured to said propellant container and having said holder releasably secured thereto in a position providing for side-by-side positioning of said container and said holder .and a flexible tube connecting said gas discharge nozzle to said transversely position of gas passageway.

10. A dispensing assembly for a preparation for application to the hair and/ or scalp having a viscosity between 9.7 seconds and 55 seconds measured in a No. 4 Ford cup at 70 F., comprising in combination a propellant container adapted to contain a regenerative liquified gas having a density greater than 85 lbs. per square inch gauge at 70 F., a gas release nozzle projecting from a valve on said container, a holder for said preparation, mounting means securable at one of its ends to said container and at the other of its ends to said holder, said mounting means maintaining said container and said holder in xed and side-by-side relationship, a unitary discharge unit having a passageway for said preparation and a transversely positioned gas passageway, said passageway for said preparation being in communication with said holder and being adapted to have said preparation iiow therethrough, said passageway for gas being in communication with said propellant container and being adapted to have dry gas flow therethrough, said passageways having outlets positioned in predetermined spaced relation, said outlet for said preparation having a size in the range between 0.014 and 0.060 inch in diameter, said gas outlet having a size in the range between 0.013 and 0.03 inch in diameter, said discharge unit having a notch between the outlet for said gas passageway and the outlet for said preparation to enable gas owing outwardly from said gas outlet to expand and flow around said outlet for preparation, a mounting member releasably secured to said propellant container and having said holder releasably secured thereto ina position providing for side-by-side positioning of said container and said holder and a ilexible tube connecting said gas discharge nozzle to said transversely positioned gas passageway.

11. A dispensing assembly for a preparation for application to hair and/or scalp having a viscosity between 9.7 seconds and 55 seconds measured in a No. 4 Ford cup at 70 F. comprising in combination a propellant container adapted to contain a regenerative lquiled gas having a density greater than 85 lbs. per cubic foot and exerting a pressure less than 35 pounds per square inch gauge at F., a gas release nozzle projecting from a valve on said container, a holder for said preparation, a unitary discharge unit having a passageway for said preparation and a transversely positioned gas passageway, said passageway for said preparation being in communication with said holder and being adapted to have said preparation ilow therethrough, said passageway for gas being in communication with said propellant container and being .adapted to have dry gas ow therethrough, said passageways having outlets positioned in predetermined spaced relationship, said outlet for said preparation having a size in the range between 0.014 and 0.060 inch in diameter, said gas outlet having a size in the range between 0.013 .and 0.03 inch in diameter, said discharge unit having a notch between the outlet for said gas passageway and the outlet for said preparation to enable gas ilowing outwardly from said gas outlet to expand and ow around said outlet for preparation, said outlet for said preparation terminating in an enlarged tip having a concave upper surface, a mounting member releasably secured to said propellant container and having said holder releasably secured thereto in a position providing for side-by-side positioning of said container and said holder and a exible tube connecting said .gas discharge nozzle to said transversely positioned gas passageway.

References Cited in the le of this patent UNITED STATES PATENTS 436,580 Hoell Sept. 16, 1890 2,553,159 Able May 15, 1951 2,635,921 Deutsch Apr. 21, 1953 2,892,317 Holmes June 30, 1959 2,895,651 Mahon et al. July 21, 1959

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