USP_20090224066_Ultrasonic atomizing nozzle methods for the food industry_VIP (1063672)
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US 20090224066A1(19) United States(12) Patent Application Publication (10) Pub. No.: US 2009/0224066 A1RIEMER(54)(43) Pub. Date:ULTRASONIC ATOMIZING NOZZLEPublication Classi?cationMETHODS FOR THE FOOD INDUSTRY(75) Inventor:Sep. 10, 2009(51)Joseph RIEMER, Rhinebeck, NY(Us)(52)Int. Cl.3053 1/02(200601)US. Cl. .................. .. 239/1022; 239/102.1; 427/424Correspondence Address:BAKER & HOSTETLER LLPWASHINGTONSQUARE,SUITE(57)1100,1050CONNECTICUT AVE NW_WASHINGTON DC 200365304 (Us)...A spraying mechamsm con?gured to form umform and thmcoatings on foodstuffs and food packaging materials.
The’(73) Assignee.ABSTRACT,spraying mechanism includes a noZZle and a surface posis0n0_Tek Corporation MiltonNY (Us)3tioned adjacent to the noZZle, Wherein the surface is con?g’ured to support at least one of a foodstuff and a food packag(21)App1_ NO;12/041,912ing material. The noZZle includes an atomiZing sectionincluding a ceramic material and an intermediate section(22)Filed;Mar. 4, 2008con?gured to promote ultrasonic-frequency mechanicalmotion in the atomiZing section.10k/x141513262418113020Patent Application PublicationSep. 10, 2009 Sheet 1 0f 6FIG.
1US 2009/0224066 A1Patent Application PublicationSep. 10, 2009 Sheet 2 0f 6US 2009/0224066 A12426FIG. 2Patent Application PublicationSep. 10, 2009 Sheet 3 0f 6US 2009/0224066 A132353446363342FIG. 3Patent Application PublicationSep. 10, 2009 Sheet 4 0f 6FIG. 5US 2009/0224066 A1Patent Application PublicationSep. 10, 2009 Sheet 5 0f 6FIG. 6US 2009/0224066 A1Patent Application PublicationSep. 10, 2009 Sheet 6 0f 6U S 2009/0224066 A1171074Sep. 10, 2009US 2009/0224066 A1ULTRASONIC ATOMIZING NOZZLEMETHODS FOR THE FOOD INDUSTRYCROSS-REFERENCE TO RELATEDAPPLICATIONS[0001] This application is related to US. patent applicationSer.
No. l l/34l,6l 6, titled “Ultrasonic atomiZing noZZle andmethod,” ?led Jan. 30, 2006, the disclosures of each Which arehereby incorporated by reference in their entirety.FIELD OF THE INVENTION[0008] The foregoing needs are met, to a great extent, bycertain embodiments of the present invention. According toone embodiment, a spraying mechanism is provided.
Thespraying mechanism includes a noZZle that itself includes anatomiZing section including a ceramic material. The noZZlealso includes an intermediate section con?gured to promoteultrasonic-frequency mechanical motion in the atomiZingsection. The spraying mechanism also includes a surfacepositioned adjacent to the noZZle and con?gured to support atleast one of a foodstuff and a food packaging material.[0009]According to another embodiment of the presentinvention, a method of depositing a coating on at least one of[0002]The present invention relates generally to methodsof forming coatings for the food industry.
More particularly,a foodstuff and a food packaging material is provided. Themethod includes coating a portion of a ceramic surface With athe present invention relates to methods of using ultrasonicnoZZles in the food industry.liquid. The method also includes mechanically moving theBACKGROUND OF THE INVENTIONCurrently, foodstuffs and food packaging materialsfood packaging material adjacent to the surface.[0010] There has thus been outlined, rather broadly, certainare routinely coated With various liquid-state chemicals orembodiments of the invention in order that the detailed[0003]surface at an ultrasonic frequency.
In addition, the methodalso includes positioning at least one of the foodstuff and theingredients. Depending on the particular application, thesedescription thereof herein may be better understood, and inchemicals may either remain in the liquid state, evaporate, orpolymerize/solidify to form a solid coating. For example,order that the present contribution to the art may be betterappreciated. There are, of course, additional embodiments ofthe invention that Will be described beloW and Which WillWhile being manufactured (i.e., prior to being Wrapped in aWaxy paper sleeve and prior to being inserted into a cardboardpackage that is then placed on the shelves of a grocery store),some crackers are coated With a thin layer of oil.
Similarly,commercially manufactured tortilla chips are typicallysprayed With one or more chemical preservatives to extendtheir shelf life.[0004]TWo types of technologies are currently available toapply such liquid-state coatings: pressure spraying and spinning disc spraying. Pressure spraying technology is analogous to the technology used While spraying one’s laWn With agarden hose.
In other Words, foodstuffs or food packagingmaterials are coated by a liquid emitted from one or morepressurized noZZles. Typically, such noZZles are located atleast above and beloW the foodstuffs or food packaging materials being coated.[0005] Spinning disc spraying involves a battery (i.e., aseries) of spinning discs located in a chamber.
These discs areangled and positioned in an application-speci?c con?guration relative to the foodstuffs or food packaging materials tobe coated. A stream of liquid is then released onto the discs asthe discs are spinning. As the liquid is expelled from thesurface of the discs by centrifugal force, a rainforest-type ofliquid mist is generated all over the chamber in Which thediscs are located. The foodstuffs or food packaging materialsthat pass through the chamber are then coated on all sides bythe liquid.form the subject matter of the claims appended hereto.[0011] In this respect, before explaining at least oneembodiment of the invention in detail, it is to be understoodthat the invention is not limited in its application to the detailsof construction and to the arrangements of the components setforth in the folloWing description or illustrated in the draWings.
The invention is capable of embodiments in addition tothose described and of being practiced and carried out invarious Ways. Also, it is to be understood that the phraseologyand terminology employed herein, as Well as the abstract, arefor the purpose of description and should not be regarded aslimiting.[0012] As such, those skilled in the art Will appreciate thatthe conception upon Which this disclosure is based mayreadily be utiliZed as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present invention. It is important, therefore, thatthe claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope ofthe present invention.BRIEF DESCRIPTION OF THE DRAWINGS[0013]FIG.
1 is a longitudinal cross-sectional vieW of aceramic-containing ultrasonic atomiZing noZZle arrangementaccording to a ?rst embodiment of the present invention.[0014] FIG. 2 illustrates a radial cross-section of the ultra[0006] Regardless of Which of these methods is used, hoWever, the coatings formed are relatively thick. Also, particularly in the spinning disc method, a signi?cant amount ofsonic atomiZing noZZle arrangement illustrated in FIG. 1taken along line 3-3.liquid is Wasted as the liquid coats the Walls of the chamberinstead of the foodstuffs or food packaging materials.ceramic-containing ultrasonic atomiZing noZZle arrangementSUMMARY OF THE INVENTION[0007] At least in vieW of the above, it Would be desirable toprovide methods for forming coatings on foodstuffs and/orfood packaging materials Wherein the resulting coatings arerelatively thin.
In addition, it Would be desirable to providemethods for forming coatings on foodstuffs and/ or foodpackaging materials Wherein the coating are uniform and Whereinthe amount of liquid being used is minimized.[0015]FIG. 3 is a longitudinal cross-sectional vieW of aaccording to a second embodiment of the present invention.[0016] FIG. 4 is a side vieW of an ultrasonic noZZle sprayarrangement according to a third embodiment of the presentinvention.[0017] FIG. 5 is a front vieW of an ultrasonic noZZle sprayarrangement according to a third embodiment of the presentinvention.[0018]FIG. 6 is a side vieW of an ultrasonic vor‘tex noZZlearrangement according to a fourth embodiment of the presentinvention.Sep.
10, 2009US 2009/0224066 A1[0019] FIG. 7 is a perspective vieW of a food coater according to an embodiment of the present invention.operating frequency, f, is raised to approximately 250 kHZ.Thus, for a given liquid, dMQ5 is reduced by a factor of(120/250)2/3:0.61.DETAILED DESCRIPTION[0020]The invention Will noW be described With referenceto the drawing ?gures, in Which like reference numerals referto like parts throughout. FIG.
1 is a longitudinal cross-sectional vieW of a ceramic-containing ultrasonic atomiZingnoZZle arrangement 10 according to a ?rst embodiment of thepresent invention. HoWever, before further discussing thedraWing ?gures any further, a feW scienti?c principles relatedto ultrasonic atomiZation are brie?y revieWed beloW.[0021]Ceramic materials (e. g., SiC and A1203) differ frommetals (e.g., titanium and titanium alloys) in a number ofWays. For example, in some ceramic materials, such as siliconcarbide (SiC) and aluminum oxide (A1203), the characteristicvelocity at Which sound Waves propagate through these materials is considerably greater than the characteristic velocity atWhich sound Waves propagate through any metallic materialthat is practical for use in constructing an ultrasonic atomiZing noZZle.
For example, SiC can be manufactured such thatthe characteristic velocity of sound therein is betWeen 2.3 and2.7 greater than the characteristic velocity of sound in aTi-6Al-4V titanium alloy.[0022] When implementing an ultrasonic atomizationmethod according to certain embodiments of the presentinvention, capillary Waves are produced in a liquid coatingthat is present on a solid surface that is vibrating at an ultrasonic frequency. Under such conditions, the number mediandrop siZe (dN,O_5) of the drops formed is calculated as folloWs:Where f?he operating frequency of the noZZle, p?he densityof the liquid coating the surface and s?he surface tension ofthe liquid.
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