EP0000610B1 - Method and apparatus for spraying a metered quantity of a semi-liquid product - Google Patents

Method and apparatus for spraying a metered quantity of a semi-liquid product Download PDF

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Publication number
EP0000610B1
EP0000610B1 EP78200113A EP78200113A EP0000610B1 EP 0000610 B1 EP0000610 B1 EP 0000610B1 EP 78200113 A EP78200113 A EP 78200113A EP 78200113 A EP78200113 A EP 78200113A EP 0000610 B1 EP0000610 B1 EP 0000610B1
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EP
European Patent Office
Prior art keywords
product
moveable
wall
generally
impact
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
Application number
EP78200113A
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German (de)
English (en)
French (fr)
Other versions
EP0000610A1 (en
Inventor
Ronald Wayne Kock
Theodore Paul Merz
Paul Kester Platt
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Procter and Gamble Co
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Procter and Gamble Co
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Publication date
Application filed by Procter and Gamble Co filed Critical Procter and Gamble Co
Publication of EP0000610A1 publication Critical patent/EP0000610A1/en
Application granted granted Critical
Publication of EP0000610B1 publication Critical patent/EP0000610B1/en
Expired legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D34/00—Containers or accessories specially adapted for handling liquid toiletry or cosmetic substances, e.g. perfumes
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K5/00—Holders or dispensers for soap, toothpaste, or the like
    • A47K5/06—Dispensers for soap
    • A47K5/12—Dispensers for soap for liquid or pasty soap
    • A47K5/1202—Dispensers for soap for liquid or pasty soap dispensing dosed volume
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/02—Membranes or pistons acting on the contents inside the container, e.g. follower pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/08—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape of pulsating nature, e.g. delivering liquid in successive separate quantities ; Fluidic oscillators
    • B05B1/083—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape of pulsating nature, e.g. delivering liquid in successive separate quantities ; Fluidic oscillators the pulsating mechanism comprising movable parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
    • B05B1/18—Roses; Shower heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/109—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle the dispensing stroke being affected by the stored energy of a spring
    • B05B11/1092—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle the dispensing stroke being affected by the stored energy of a spring automatically released from a loaded state at the end of the loading stroke

Definitions

  • This invention relates to spray dispensing and, more particularly, to spray dispensing of metered quantities of semi-liquid products finding particular utility for depositing a defined and metered pattern of, for example, an anhydrous cream antiperspirant product on an axilla surface.
  • Spray dispensing is generally achieved by delivering a liquid product to a nozzle under pressure induced, e.g., by a pump, pressurized gas, or a collapsible wall container.
  • a pump pressurized gas
  • collapsible wall container e.g., a collapsible wall container.
  • Each of these dispensing systems have advantages and disadvantages that have made them more or less suitable for a wide variety of products. The thinner and less viscous the product, however, the easier it is to spray utilizing such pressure operated systems. The thicker and more viscous the product, conversely, the harder it is to spray utilizing such systems.
  • Semi-liquid cream or like products such as gels, thickened emulsions, and the like; products having high tackiness, tenaciousness or cohesiveness; or products having a very high solids content, are particufarty difficult to spray through a nozzle utilizing conventional pump, pressurized gas, or collapsible wall dispensing systems.
  • Finger and trigger pumps as well as squeeze bottles are generally incapable of providing sufficient operating pressures for spraying thick cream-like products from nozzles and particularly for spraying products having a viscosity of 25 to 50 centipoise or higher.
  • Gas operated systems are, of course, capable of supplying higher nozzle pressures but gas operated systems are prone to other problems, especially in inexpensive consumer product dispensing systems, including problems in providing clean start and stop action and a uniform metered spray especially with thick, cohesive products.
  • U.S. Patent No. 3,782,380 describes a device for dispensing fluid through a discharge orifice in which the fluid is contained within a chamber having a moveable wall and the moveable wall is contacted by a plunger assembly actuated by a compression spring.
  • the plunger assembly is arranged to push the moveable wall with a follow through force along at least part of the chamber to dispense the product.
  • spray type products have been preferred by a large segment of the market, presumably in large part because of their "non-contact" mode of application; i.e., the product (as opposed to the package) is not susceptible to being touched by others prior to or between uses by a specific user as well as requiring only minimal user involvement with the target area.
  • the present invention provides novel and improved methods of and apparatus for spray dispensing a metered quantity of product in a controlled and uniform ballistic cluster of closely defined particles, particularly suitable for semi-liquid products, such as highly thixotropic, highly stable anhydrous antiperspirant creams.
  • the present method and apparatus provides for the "non-contact" delivery of antiperspirant and/or deodorant products without, in general, imparting any undesirable, cold, wet, sticky, or runny sensation to the skin and, particularly axilla surfaces, and having improved safety in providing generally uniform particle size, minimization of inhalables, and lack of any gaseous propellant.
  • the present invention in addition to the foregoing, provides for the spray dispensing of a cluster of semi-liquid particles from a pattern of discharge orifices ballistically to the surface to impinge and merge thereon in a pattern generally reflecting a projection of the locus set of the pattern of discharge orifices.
  • the invention also provides an apparatus for dispensing a metered quantity of a semi-liquid product
  • a substantially rigid container adapted to be filled with the semi-liquid product and having a fixed wall provided with at least one generally open and unobstructed discharge passageway, a moveable wall spaced apart from the fixed wall and a moveable mass adapted to contact the moveable wall, wherein energising means provided for accelerating the moveable impact mass so that it impacts the moveable wall with sufficient impact force to induce a pressure pulse in the product of sufficient energy to surge a metered quantity of product less than the entire content of the container and dependent upon the momentum of the impact mass as a noodle or noodles through the discharge passageway with sufficient velocity as to break away from the passageway and the remaining product within the container to ballistically travel outwardly of the container fixed wall.
  • the spray dispenser of the present invention has the capacity of spraying in any direction independent of container orientation and is stable, safe, and predictably uniform independent of atmospheric pressures and compositions or gravitational forces, being capable of operation, for example
  • the impact does not generally advance the product mass within the container for expulsion through the discharge passageways. Rather, it is believed that the fixed wall generally retains the product mass from instantaneous movement so that the momentum of the impact mass produces primarily pressure head within the product mass which is recovered or converted to velocity head at the free surface of the product exposed through the discharge passageway.
  • the direction of opening of the discharge passageways i.e., their axes
  • the moveable and fixed walls need not be parallel. Discharge at right angles to the direction of impact is even possible.
  • the total discharge passageway cross-sectional area be substantially smaller than the area of the moveable wall or follower.
  • the noodles or cluster of particles formed by the dispenser travel ballistically generally generally normal to the fixed wall outwardly of the container.
  • the cluster of particles may be aimed toward a target surface and the deposition pattern thereon may, by proper selection of energy and product, define a projection of the discharge passageway pattern selectively comprising either a discrete projection of the individual discharge passageways or a generally uniform coverage of the passageway locus set.
  • the fixed wall may be generally planar, whereby the particles of the cluster will move along generally parallel paths or maybe selectively generally concave or convex with the passageway axes converging or diverging whereby the particle paths will generally converge or diverge, respectively.
  • a specific, preferred embodiment of the present invention comprises a hand holdable, hand operable non-contact dispenser for and in combination with a stable, non-crusting anhydrous, thixotropic antiperspirant cream to provide metered and uniform non-contact spray applications thereof to axilla surfaces without, in general, imparting any undesirable, cold, wet or sticky sensation.
  • the preferred embodiment uses one light follower as the moveable wall impacted by a single heavier hammer-like-impact mass accelerated by a spring and freely moving when it strikes the moveable wall.
  • Multiple orifices or discharge passageways are provided in the fixed wall to dispense a single product dose.
  • Multiple followers/cylinders each with individual or multiple orifices or discharge passageways also are feasible for dispensing a single dose in accordance with this invention.
  • the target pattern is achieved by virtue of the geometric orientation of the discharge passageways.
  • One primary spot of product shows up at the target for each discharge passageway.
  • the size of the spot is a function of the size of the passageway orifice, the pressure pulse, and the product properties. Particle breakup may, however, occur.
  • the critical requirement of this dispensing mechanism is the pressure pulse created by the impact. Without the rapid cut-off nature of the pressure pulse, the product might not break away from itself at the exit orifice of each passageway. The noodle extrusion must be accelerated and then decelerated fast enough to allow the inertia of the product outside the orifice to break away from that still in the passageway and to then continue traveling on to the target. The larger the particle of product and distance between orifice and target, the greater the energy that must be transferred to the product from the impact. The major portion of the product within the container remains essentially static and it is believed that only a pressure wave is transmitted through the product, to be converted to velocity only at the product surface portions exposed through the generally open and unobstructed discharge passageways in the preferred embodiment.
  • Product forms other than a thick, rigid cream can be dispensed with the methods and from the apparatus of the present invention.
  • dry powders and runny creams might not be easily retained in the orifices or discharge passageways, except by auxiliary retention or closure means.
  • the properties of the product must obviously fit this dispensing approach.
  • the product must be rigid enough to prevent flow out of the orifice or discharge passageways prior to the application of the pressure pulse. It should be resistant to deterioration or changes of properties when exposed to air at the discharge passageways since they are generally open and unobstructed.
  • a protective overcap or other closure means may be provided to be removed or opened manually or automatically, without departing from the present invention.
  • the products' surface tension, viscosity, yield point, and related properties should allow it to be extruded and separated with a minimal energy input.
  • the product should also, when designed to be deposited on a target surface, adhere to the target surface, preferably without rebound.
  • a compression spring is manually cocked and triggered by a single user motion to accelerate the hammer-like impact mass.
  • Alternative energy sources may include compressed gases, explosive caps, electric solenoids, magnetic fields, and other spring configurations.
  • the follower or moveable wall which rests against the product could be a diaphragm.
  • the discharge passageways may be generally cylindrical or may be slightly divergent or convergent and the fixed wall may be, if desired, generally concave or convex rather than generally planar and/or the passageway axes may also converge or diverge.
  • the product should be devoid of any trapped gas or other relatively compressible elements, since they would tend to explode the product noodles upon their being extruded from the discharge passageways, disrupting the spray pattern and dissipating the impulse energy.
  • the product particle velocity should be sufficiently low as to be not uncomfortable when the particles strike the skin.
  • the amount of product dispensed at each actuation is uniform and constant, depending upon the impact energy of the hammer-like impact mass when it strikes the follower.
  • the hammer-like impact mass is accelerated by a uniform spring force, for example, with a uniform spring compression for each actuation, and allowed to then freely travel for impact with the moveable wall of the canister, its impact energy will be independent of the depth of product within the canister and a uniform metered quantity of product will be dispersed.
  • the fixed wall retain the bulk of the product mass against movement.
  • the total cross-section area of the discharge passageways apparently must be substantially less than the area of each of the fixed wall and the moveable wall or follower.
  • the fixed and moveable walls need not be equal in area nor parallel in orientation. Discharge even at right angles to the direction of impact is even possible.
  • the dispenser 10 preferably comprises means for containing a quantity of product for measured spray dispensing such as a product canister 12 structurally associated with energizing means for accelerating an impact mass for impact thereagainst to induce a pressure pulse within the product and thereby spray dispense a metered quantity of product therefrom.
  • the dispenser 10 may, without departing from the broader aspects of this invention, be of substantially any desired shape, size and configuration commensurate with the product to be dispensed, the metered quantity thereof to be dispensed by each impact pulse, the number of charges or metered quantities to be delivered before refill or replacement is required, the level of the energy per pulse required, the size of the spray pattern desired, the distance the spray must travel, the discharge velocity desired, the cycling rate desired, and the like.
  • the dispenser 10 may be substantially self-contained, wherein the container is normally substantially emptied before being refilled or replaced or may be connected with a supplemental product source wherein product may be essentially continuously supplied to replenish the supply in the product canister 12 or from which make up quantities of product may be supplied intermittently, such as, .for example following each discharge cycle.
  • the means for accelerating the impact mass may also be designed for relatively infrequent actuation, as for consumer product dispensing, or for highly repetitive actuation, as by shop air, power lines, or the like, as for foreseeable commercial/industrial segment applications, even including high speed multiple operation per minute cycling providing substantially uninterrupted spraying of product material.
  • the dispenser of the present invention is especially applicable to the consumer sector spray dispensing of a novel cream antiperspirant product where generally only a single daily dose application from a single or a few actuations per axilla is generally what is desired.
  • the dispenser should be comfortable to be hand held, directed, aimed and actuated by a typical consumer.
  • the dispenser 10 should not, in general, exceed about 15-20 cm in length, about 4-6 cm across the grip area, and about 1 kg in weight, with the impact mass delivering an energy pulse not exceeding about 2,306 to 3,460 cm.g.
  • the means for supplying the impact impulse may conveniently, as shown, comprise an energizing helve 14 (the term helve being used to indicate that it functions as fully half the dispenser, providing a grip portion as well as mechanical utility).
  • the helve 14 in turn, carries a hand actuable trigger 16 moveable between a normal, unactuated position shown in solid lines in Figures 1 and 3 and phantom lines in Figure 2 and an inwardly depressed actuated position, shown in solid lines in Figures 2 and 4.
  • the spray or cluster 18 of particles of product in general comprises sets of primary and secondary product particles designated 20 and 22, respectively.
  • the product canister 12 may comprise a generally rigid annular side wall 24 defining a generally cylindrical bore 26 closed at a forward end portion by a substantially rigid fixed wall 28 provided with at least one and preferably a plurality of generally open and unobstructed discharge passageways 30. Slidable within the bore 26 in spaced apart relationship to the fixed wall 28 there is provided a moveable wall or follower 32 to define within the canister 12 a product chamber 34 which may be filled with a quantity of semi-liquid product 36. While the moveable wall or follower 32 is slidable within the bore 26, it should have a tight enough fit to minimize product leakage between the side wall 24 and the follower 32. In practice, a 0,3 mm diametral gap appears satisfactory for use with antiperspirant creams as hereinafter described.
  • the fixed wall or orifice plate 28 is generally planar so that the particles of product as they move generally perpendicularly outwardly thereof move along generally parallel paths, without diverging as would occur in conventional spray mechanisms.
  • the spray may, if desired, be made to converge or diverge by making the fixed wall 28 outwardly concave or convex and for the passageway axes otherwise convergent or divergent, respectively.
  • modified product canister 12' and 12" having an outwardly convex fixed wall 28' with outwardly divergent passageways 30' and an outwardly concave fixed wall 28" with outwardly convergent passageways 30", from which the product will be dispensed in a generally diverging and converging spray pattern, respectively.
  • a "semi-liquid" product as used herein, both in the description and hereinafter in the claims is intended to be used to describe products that can be satisfactorily spray dispensed with the apparatus and process herein described to define a metered cluster of ballistically ejected generally uniformly defined and formed particles, as herein described, disclosed, illustrated and shown. Quantitative descriptions of the properties leading to prediction of successful results, as defined by the quality of particle uniformity in size and trajectory, have not yet been achieved. Representative products that are successful are disclosed herein, but it is not the intention hereof to limit the scope of the present invention, in its broader aspects, to any particular product formulation.
  • Suitable "semi-liquid" products are, in general, thick or viscous so that they exhibit little tendency to run or flow under gravitational attraction and therefore preferably do not flow out of the generally open and unobstructed discharge passageways 30 until the pressure pulse is induced by, for example, the energizing helve 14 and then, only the desired metered quantity of product is ejected from the generally open and unobstructed discharge passageways as is determined by the magnitude and duration of the pressure pulse induced in the product by the impact mass.
  • antiperspirant compounds are set forth hereinafter.
  • tests by which "semi-liquids" may be easily identified are hereinafter described and disclosed.
  • the invention sprays a uniform cluster of a semi-liquid product
  • the invention is not limited thereby, however, and in its broader aspects may be used to dispense other flowable materials which do not form uniform product. droplets, such as products which do explode or break up after or during exit from the discharge passageways.
  • the canister 12 may be sold or supplied as a disposable package, sold or supplied pre-filled with the product 36. Alternatively, the canister 12 may be refillable. To enable the canister 12 to be sold or supplied pre-filled and to enable quick and easy replacement thereof, the end portion of the side wall 24 generally opposite the fixed wall or orifice plate 28 may be provided with means, such as internal screw threads 38 for providing removable attachment of the canister 12 to the energizing helve 14.
  • the forward and rearward faces of the movable wall or follower 32 may be provided with counterbores or recesses 40 and 42, respectively.
  • the side wall 24 may be extended generally forwardly of the forward wall or orifice plate 28, as shown, to provide an annular rim portion 44 surrounding the openings of the discharge passageways 30, enabling the spray device 10 or the product canister 12 to be placed on a table or other surface resting on the annular rim 44 with the forward wall or orifice plate 28 being raised therefrom.
  • the energizing helve 14 provides support for the canister 12 enabling the spray device 10 to be hand-held and actuated for spray ejection therefrom of the metered quantity of product constituting the cluster 18 of product particles.
  • the generally cylindrical configuration of the helve 14 also enables the dispenser 10 to be aimed or directed for the ballistic delivery of the cluster 18 of particles 20 and 22 which are discharged from the generally open and unobstructed discharge passageways 30 in a spray pattern determined primarily by the size, number and pattern of the open and unobstructed discharge passageways 30 across the fixed wall or orifice plate 28 relative the magnitude of the pressure pulse induced and the product characteristics.
  • the fixed wall 28, 28' and 28" are generally transverse the longitudinal axis of the helve 14 and, particularly, the handle portion thereof. Since, however, it is believed to be primarily pressure, rather than velocity that is transmitted through the product from the follower 32 to the fixed wall 28 (or 28' or 28"), the fixed wall need not be parallel the follower 32 nor even transverse the helve 14.
  • the target pattern is achieved by virtue of the geometric orientation of the passageways across the orifice plate.
  • One primary spot of product shows up at the target for each passageway.
  • the size of the spot is a function of the size of the passageway, the product characteristics, the energy transfer, and the relative sizes and masses of the impact mass and the follower.
  • the follower or moveable wall 32 are generally heavier, not only because of the diameter, but also because larger diameters require longer sidewalls to prevent cocking.
  • Flexibiity of the canister acts to dampen the pressure pulse. The smaller the canister the more rigid it is.
  • Example II cream is the product described in detail hereinafter in Example II at page 43 and with reference to Figure 12.
  • the delivery from the smaller diameter canister was, therefore, 270% of that from the larger canister.
  • the pressure pulse in the small canister would.be 214% of the pressure pulse in the large canister and the delivery from the small canister would be 214% of the delivery from the large canister.
  • the delivery is actually 270% for the small canister, somewhat greater than the theoretical value. This is believed to be at least partly explained by the fact that the larger diameter canister had more flexible walls to absorb some of the pressure and a larger follower weight to reduce the impulse generated force.
  • Figures 8 and 9 are photographs, essentially full size, of the product deposition pattern resulting on a black target surface from each of the two trials described immediately hereabove.
  • FIG. 8 shows the deposition pattern from the 6 cm. diameter canister. It may be readily seen that a single small primary spot of product essentially appears for each of the 45 discharge passageways. Hence, the deposition pattern defines a projection of the discharge passageway pattern providing a discrete projection of the individual discharge passageways.
  • FIG. 9 is a similar photograph which shows the product deposition pattern from the 4 cm. diameter canister.
  • the deposition pattern also defines a projection of the discharge passageway pattern and one single primary spot of product essentially appears for each of the discharge passageways.
  • the product spots are seen to be much larger, apparently because of both the increased product delivery rate per discharge passageway and the probably increased velocity of the product particles at impact on the target.
  • the spots still corresponds to a projection of the discharge passageway pattern, on the target the spots have each spread to partially overlap and merge to provide a generally uniform coverage of the passageway locus set.
  • Passageway cross-sections other than round can be used, and slots have successfully dispensed product.
  • slots rather than round holes is not as satisfactory, the resulting spray pattern lacking the uniformity resulting from round holes.
  • Experiment 1 The weight was dropped from a 20 cm. drop height five times and sprayed product collected on the same tared card. The card was weighed after each drop and recorded. Energy developed per drop from 24 holes 0.16 cm. diameter x 0.32 cm. long was calculated to an average weight per shot of .22 gm. ⁇ .01 gm. and each impact was within 5% of this value.
  • FIG. 11 there is shown a graph wherein delivery rate utilizing the same dispenser; (i.e., 24 holes, 5.7 cm. diameter canister) is compared against hole length.
  • the energy pulse was supplied by a falling 83.5 g. weight dropped 28 cm.
  • the hole diameter was 0.16 cm.
  • the curve indicates that, at least for this product, for maximum delivery for a given energy input, the orifice or passageway length should be kept as short as possible since, at larger ratios, the amount of product dispensed decreases markedly.
  • the product was that of Example III, described in detail hereinafter, page 13.
  • the graph also shows that, since product delivery weight can be affected by the length of the discharge passageway, variations in passageway length can be used to provide a mechanism for effecting varying delivery rates for the same energizer and product.
  • Example III the same product (i.e., Example III) the same dispenser and same impulse input was used to plot the delivery rate through 24 passageways of 0.165 cm. lengths with differing diameters.
  • the graph shows a nearly perfect linear relationship between hole diameter and grams delivered.
  • substantially any flowable product may be dispensed using the present invention providing only that it can be retained in the container and discharge passageways; that is, it will not run or leak from the unit when not actuated.
  • the limits of flowability, wherein the product will break away from the unit and fly to the target area when actuated yet will not run or leak from the unit when not actuated, are hard to define on an absolute basis, since factors other than simple viscosity seem to be important.
  • discharge passageway diameter between about 0.018 and 0.318 cm.
  • a lower limit was defined by using various dimethylpolysiloxane fluids furnished by Dow Corning Corporation under the trademark Fluid 200.
  • the least viscous one of these fluids which did not flow from the discharge passageway during static conditions had a kinematic viscosity of about 26.4 centistokes as designated by Dow Corning and as determined by Dow Corning Corporate Test Method CTM 0004 dated July 29, 1970 entitled "VISCOSITY - Glass Capillary Viscometer” and available from Dow Corning Corporation, Midland, Michigan.
  • the test measures the time required for a fixed volume of sample to pass through a calibrated glass capillary using "gravity-flow” and interpolates the time to the times of fluids standardized according to ASTM D2162. The method is based on ASTM D445.
  • Example 11 for spraying of an antiperspirant product cream as set forth hereinafter as Example 11, to define a preferred embodiment to comprise a canister of 5.7 cm. I.D. with its fixed wall being 0.32 cm. thick and provided with 120 discharge passageways arranged in a hexagonal array (as shown in FIG. 5) on 0.4 cm. center to center spacing with each being 0.09 cm. in diameter by 0.076 cm. length and having a 0.24 cm. internal countersink to be actuated by 2,306 cm.g. of energy by a 68 g. hammer against a 13.6 g. follower with a 5.7 cm. outside diameter.
  • the energizing helve 14 has a generally cylindrical handle portion 46 having a longitudinally extending groove 48 within which the trigger 16 is hinged, as by a pintle or pin 50.
  • the handle portion 46 is also provided with a recess 52 providing access to the trigger 16 by the user's hands or fingers even while the trigger 16 is being depressed to its actuated position, enabling operation thereof by a simple squeeze motion of a user's hand.
  • a generally longitudinally extending bore 54 and a generally longitudinally extending slot 56 are provided, the slot 56 connecting the groove 48 with the bore 54.
  • the groove 48 and slot 56 in addition to enabling movement of the various actuating elements, also provide vents of the bore 54 to the atmosphere. Sufficient venting of the various impulse delivering elements is important to avoid any pneumatic dampening or cushioning.
  • the forward end portion of the energizing helve 14 may comprise a hammer cup 57 provided with a generally circular hole or bowl 58 extending generally perpendicularly inwardly from the hammer cup front face 60.
  • the front face 60 may be generally perpendicular the bore 54.
  • the hammer cup 57 may also be provided with an externally threaded shoulder 62 onto which the canister 12 can be assembled. Contained within the bowl 58 of the hammer cup 57 is slidably disposed a hammer-like impact mass 64 comprising a stem portion 66.
  • the hammer 64 is freely moveable with the bowl 58 and the stem portion 66 thereof may be slidably guided within the bore 54 for reciprocating movement perpendicular the hammer cup front face 60. Reciprocation of the hammer 64, guided by the stem portion 66, enables the front face 70 of the hammer 64 to impact against the movable wall or follower 32 of the cannister 12 to provide the pressure pulse within the product 36 to initiate the spray operation.
  • the hammer 64 is provided with a passage 68 extending from the impact face 70 of the hammer 64 generally longitudinally concentrically through the stem portion 66 thereof.
  • the passage 68 provides both a vent path through the hammer 64 to preclude any air dampening or cushioning thereof and a channel within which there may be disposed a hammer return spring 72.
  • the hammer return spring 72 biases the hammer 64 inwardly of the hammer cup 57 and bowl 58.
  • the hammer return spring 72 exerts, at all times a return force against the hammer 64 exceeding the weight of the hammer 64 to enable the dispenser to be operated in any orientation.
  • the hammer return spring 72 may extend from the passage 68 into the lower end of the bore 54.
  • the hammer return spring 72 may be a helical extension spring having hooked ends, one end which is attached to a hammer retaining pin 74 extending transversely of the hammer 64 through the passage 68.
  • a counterbore 76 terminating at a forward shoulder 78.
  • the slide member 80 may comprise a lug portion 82 extending transversely outwardly thereof into the slot 56.
  • the slide 80 also may comprise a forward driving face 84 which, in the forward most position of the slide 80, may engage the shoulder 78 of the counterbore 76.
  • the hammer 64 including the stem portion 66 thereof, may be of a length substantially equal to the length of the bore 54 between the hammer cup face 60 and the counterbore shoulder 78 so that, as shown in Figure 3, when the slide impact face 84 is engaged against the shoulder 78 of the counterbore 76 the impact face 70 of the hammer 64 is in general planar alignment with the forward face 60 of the hammer ,cup 57 and spaced apart from the movable wall or follower 32 by the depth of the rearward recess 42 of the follower 32, all as shown in Figure 3, which illustrates the dispenser 10 in the unactuated configuration.
  • a mainspring 86 which, as shown, may comprise a helical, compression spring having either plane or ground ends.
  • the mainspring 86 may be retained within the counterbore 76 by a plug member 88 held, in turn, by a retaining pin 90 extending transversely therethrough and into the handle portion 46 on either side of the counterbore 76.
  • the slide 80 may be provided with a central passage 92 in general alignment with passage 68 of the hammer stem 66.
  • the plug 88 may be of generally cup-like configuration containing a bore 94 through which the retaining pin 90 may pass.
  • the mainspring 86 preferably may have an outside diameter slightly less than the inside diameter of the counterbore 76 and greater than the diameter of the slide passage 92 and cup 94 of the plug 88 and a free height generally somewhat more than the distance separating the slide 80 from the plug 88 such that the mainspring 86 will be compressed by rearward movement of the slide 80.
  • the hammer return spring 72 may pass generally freely through the passage 92 of the slide 80, generally through the center of the mainspring 86, and into the cup 94 of the plug 88 so that the lower looped end thereof may be held by the retaining pin 90.
  • the preferred spring energizers for the illustrated antiperspirant dispenser use a 68 g. hammer 64. However, part of the user input energy never reaches the hammer 64, being absorbed by mechanical losses.
  • the hammer return spring 72 absorbs additional user input energy depending on whether the canister 12 is full or near empty.
  • the rigidity of the product head components is important. If the fixed wall having the discharge passageways 30 is flexible or an inelastic collision occurs between moveable wall or follower 32 and the hammer 64, significant energy is absorbed by materials other than the product, thereby reducing the pressure pulse. Flexibility also apparently allows vibrations or reflected pressure waves in the canister after impact to extrude a small amount of additional product from the discharge passageways, simulating poor breakaway.
  • the trigger 16 as heretobefore pointed out, may be pivoted within the groove 48 about the pintal or pin 50. There may also be provided a stop pin 96 extending across the groove 48 to pass through an aperture 98 provided within the trigger 16. The pin 96 may therefore limit outward pivot movement of the trigger 16 to its normal, nonoperative position, as shown in Figure 3.
  • a toggle link 102 pivotably associated with the trigger 16 by means of a link pin 104 and biased for counterclockwise movement relative thereto, as by means of a link spring 106.
  • the link spring 106 may comprise a wishbone spring having a tang portion 108 engaging the toggle link 102, a coil portion 110 surrounding the link pink 104 and a tail portion 112 engaging the trigger 16.
  • the toggle link 102 may be provided with a rounded a nose portion 114 which may engage the lug portion 82 of the slide 80 as shown in Figures 3 and 4.
  • a trip pin 116 extending transversely of the groove 48 positioned, for example, partially within the slot 56 and cooperating with the toggle link 102.
  • the lug portion 82 is thereat released from engagement with the toggle link 102, enabling the mainspring 86 to accelerate the slide 80 forwardly within the counterbore 76.
  • the slide 80 will stop upon engagement of the shoulder 78.
  • a removable protective cap 120 having an annular skirt portion 122 and vent means, such as a vent hole 124 may be provided to protect the product 34 against excessive exposure to the air.
  • the vent hole 124 prevents any pressure differential developing during assembly or storage across the product mass 30, the back of the moveable wall or follower being in turn, as heretofore detailed, vented through the helve 14.
  • the dispenser 10 can be repetitively operated in the above manner until the product 36 is substantially entirely exhausted from the product canister 12 and the moveable wall or follower 32 has moved forwardly into engagement with the fixed wall 28.
  • the moveable wall or follower 32 closely approaches the fixed wall or orifice plate 28, erratic spray operation results.
  • the reasons for such erratic operation is not known but it appears to be related to a need for the retention of sufficient product 36 between the moveable wall or follower 32 and the fixed wall 28 to absorb the impact induced pressure pulse and transmit it uniformly across the fixed wall 28 and discharge passageways 30.
  • the moveable wall or follower 32 is provided, as hereinbefore set forth with the forward facing counterbore or recess 40 so that a small amount of product 36 is retained within the recess 40 so as to be distributed across the fixed wall or orifice plate 28 and across all of the generally open and unobstructed discharge passageways 30 extending therethrough even as the moveable wall or follower 32 bottoms out or engages the inside of the fixed wall or orifice plate 28 annularly around the rim circumscribing the set of generally open and unobstructed discharge passageways 30.
  • FIGS. 13 and 14 high speed photographs clearly show the spraying of a cream product from apparatus of the present invention illustrating the mode of spray formation.
  • the cream utilized consisted of the following formulation (by weight):
  • Bentone 27 is a hydrophobically treated montmorillonite clay which has a particle size of below about 5 microns and is commercially available from the NL Industries, Inc. (formerly National Lead Company). Bentones in general are prepared by reacting bentonite in a cation exchange system with an amine. Bentonite is a colloidal, hydrated aluminum silicate obtained from montmorillonite and has the formula AI 2 0 3 4Si0 2 . H 2 0. A more detailed discussion of bentonite can be found in the Kirk-Othmer Encyclopedia of Chemical Technology, 2nd. Ed., Vol. 3 (1964), pp. 339-360, published by Interscience Publishers, which is incorporated herein by reference. Bentone 27 is described in greater detail in technical bulletin F-71-66 from the National Lead Company entitled "BENTONE 27", which is incorporated herein by reference.
  • the cream may be prepared by admixing the isopropyl myristate, cetyl alcohol and perfume together.
  • the Bentone 27 is then added and mixed with a suitable agitating device for several minutes to form a uniform composition.
  • the propylene carbonate may then be added under continued agitation until gellation occurs.
  • particulate aluminum chlorhydrate having a particle size preferably from about 1-100 microns, more preferably from about 1-50 microns
  • the isopropyl myristate, cetyl alcohol, perfume, Bentone 27 and propylene carbonate can be admixed in a colloid mill or Osterizer to form the thixotropic gel matrix.
  • Suspension of the aluminum chlorhydrate within the thixotropic gel can be accomplished by a Hobart mixer or colloid mill.
  • FIGS. 13 and 14 the above formulation was spray dispensed from a canister by impact in accordance with the present invention.
  • FIGS. 13 and 14 comprise a sequence of high speed photographs taken with a HYCAM Model 41-0004 high speed rotating prism camera manufactured by Redlake Corporation of Santa Clara, California, at 3,000 frames per second on 16 mm movie film. After processing, the individual movie frames were photographed on 35 mm negative film and alternate frames were printed to produce FIGS. 13 and 14.
  • each of the individual frames a-j in FIGS. 13 and 14 are separated by a time interval of two-three thousandths of a second or, one fifteen hundredths second equal to approximately six hundred and sixty-six microseconds.
  • the camera was started and then the impulse mass tripped.
  • the frame "a" for each of FIGS. 13 and 14 the first frame upon which product expulsion could be discerned was chosen.
  • the canister end or fixed wall which was, in this instance, 5.1 cm. in diameter, can be seen in the lower portion of each frame.
  • the canister wall was provided with 45 discharge passageways, each 0,114 cm. in diameter by 0.076 cm. length.
  • the impact mass was 66 g. and applied approximately 3,460 cm.g. of impact.
  • FIGS. 13 and 14 represent two sequences photographed from slightly differing angles, FIG. 13 was photographed first, then FIG. 14. From the photographs it can be readily seen that the product discharge occurs primarily as the extrusion of a slug or noodle of product substantially simultaneously from each of the discharge passageways. As the noodle or slug or product is projected outwardly from the discharge passageways tenaciousness of the product draws a tail behind each primary product slug or particle which, as is clearly shown in the photographic sequences, are drawn finer and finer until they break up into secondary clusters of smaller particles trailing behind the cluster or front of primary particles. As is also clearly shown in the photographic sequences, the particles do move ballistically along generally parallel trajectories generally normal the face of the dispenser.
  • FIG. 15 is a sequential photograph similar to those of FIGS. 13 and 14 and prepared in a similar manner.
  • the canister has been provided with a fewer number of discharge passageways, namely, 18.
  • FIG. 15 Comparison of FIG. 15 with FIGS. 13 and 14 indicates some interesting similarities and distinctions, although the reasons therefore are not known. Firstly, the particle velocity appears to! be substantially the same. However, the primary; product particles are much more clearly defined, as is the breakup mechanism for the elongating tails.
  • the cream extruded in the photographs of FIG. 15 has a substantially higher ratio of oil to solids wherein the oil is defined as being the total of the isopropyl myristate, propylene carbonate and perfume with the solids being defined as the total of Bentone, cetyl alcohol and aluminum chlorhydroxide. Overall, the product formulation and passageway arrangement of Example II appears to provide a better spray definition than Example 1.
  • Another antiperspirant formulation which has found utility in combination with the methods and apparatus of the present invention containing the following proportions of ingredients (by weight):
  • Bentone 38 is another amine treated montmorillonite clay similar to Bentone 27 supplied by N. L. Industries, Inc. It is described in more detail in technical bulletin F-56-67 from the National Lead Company entitled "BENTONE 38", which is incorporated herein by reference.
  • the Ethanol may comprise SDA 40 (i.e., Specially Denatured Alcohol) which has been denatured with 0.125% tertiary butyl alcohol or with 1.5 ounce per 100 gallons of brucene sulphate or brucene alkaloid.
  • SDA 40 Specially Denatured Alcohol
  • the cream may be compounded, for example, similar to the compounding of Examples I and II or may be compounded by sequentially mixing together at room temperature in, for example, a colloid mill, a Waring Blender or an Osterizer.
  • a colloid mill for example, a colloid mill, a Waring Blender or an Osterizer.
  • Bentones in general must be incorporated with high shear dispersion, but alternatively, the cream may be compounded in a paddle mixer and be subsequently subjected to the needed high shear, as by means of a positive displacement pump.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Nozzles (AREA)
  • Cosmetics (AREA)
EP78200113A 1977-08-01 1978-07-20 Method and apparatus for spraying a metered quantity of a semi-liquid product Expired EP0000610B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US820508 1977-08-01
US05/820,508 US4167245A (en) 1977-08-01 1977-08-01 Spray dispensing

Publications (2)

Publication Number Publication Date
EP0000610A1 EP0000610A1 (en) 1979-02-07
EP0000610B1 true EP0000610B1 (en) 1981-02-11

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ID=25230984

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EP78200113A Expired EP0000610B1 (en) 1977-08-01 1978-07-20 Method and apparatus for spraying a metered quantity of a semi-liquid product

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US (1) US4167245A (pt)
EP (1) EP0000610B1 (pt)
JP (1) JPS5463583A (pt)
AU (1) AU517272B2 (pt)
BR (1) BR7804939A (pt)
CA (1) CA1096823A (pt)
DE (1) DE2860468D1 (pt)
ES (1) ES472219A1 (pt)
GR (1) GR70690B (pt)
IT (1) IT7826349A0 (pt)
MX (1) MX145624A (pt)
PH (1) PH16206A (pt)

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DE3733523A1 (de) * 1987-10-03 1989-05-03 Neumann Wolfgang N Treibgasfreie spruehdose mit mechanischem energiespeicher

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CA2145599C (en) * 1995-03-27 2001-12-04 David Wesley Forbes Method of continuously testing the accuracy of results obtained from an automatic viscometer
NL1001401C2 (nl) * 1995-10-11 1997-04-15 Raytec Bv Bedieningshandgreep en daarmee uitgerust apparaat.
US5769324A (en) * 1996-11-04 1998-06-23 Lenhart; David A. Portable washing device
US5855323A (en) * 1996-11-13 1999-01-05 Sandia Corporation Method and apparatus for jetting, manufacturing and attaching uniform solder balls
NL1008999C2 (nl) * 1998-04-24 1999-10-26 Vendor Bv Vloeistofverstuiver.
FR2817245B1 (fr) * 2000-11-30 2003-05-02 Valois Sa Dispositif de distribution de produit fluide
CA2439766C (en) 2001-03-15 2008-12-09 The Government Of The United States Of America As Represented By The Secretary Of The Department Of Health And Human Services, Centers For Disease Control And Prevention Nebulizer having cooling chamber
US6637671B2 (en) * 2001-10-22 2003-10-28 S.C. Johnson & Son, Inc. Reduced risk dispensing of petroleum distillate based household products
ATE418393T1 (de) * 2003-02-21 2009-01-15 Boehringer Ingelheim Micropart Spender zum dosierten abgeben eines in einem behälter befindlichen flüssigen mediums
EP2258428B1 (en) 2004-04-02 2019-11-27 The Government of the United States of America as represented by the Secretary of the Department of Health and Human Services Aerosol delivery systems
US7726520B2 (en) * 2005-12-22 2010-06-01 Innopak Inc. Metered dispenser with feed-containing piston drive mechanism
FR2932399B1 (fr) * 2008-06-17 2011-10-28 Valois Sas Dispositif de distribution de produit fluide
IN2014MN02377A (pt) * 2012-06-26 2015-08-14 Unilever Plc
EP3020895B1 (de) 2014-11-13 2017-11-15 Huf Hülsbeck & Fürst GmbH & Co. KG Türgriff eines fahrzeugs mit einem zugmittel
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Publication number Priority date Publication date Assignee Title
DE3733523A1 (de) * 1987-10-03 1989-05-03 Neumann Wolfgang N Treibgasfreie spruehdose mit mechanischem energiespeicher

Also Published As

Publication number Publication date
AU517272B2 (en) 1981-07-16
CA1096823A (en) 1981-03-03
ES472219A1 (es) 1979-03-16
US4167245A (en) 1979-09-11
AU3848378A (en) 1980-02-07
PH16206A (en) 1983-08-05
EP0000610A1 (en) 1979-02-07
MX145624A (es) 1982-03-16
IT7826349A0 (it) 1978-07-31
GR70690B (pt) 1982-12-20
DE2860468D1 (en) 1981-03-26
JPS5463583A (en) 1979-05-22
BR7804939A (pt) 1979-03-06

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