CA1054142A - Caged impellors in a bottom fed whipper appliance - Google Patents
Caged impellors in a bottom fed whipper applianceInfo
- Publication number
- CA1054142A CA1054142A CA229,045A CA229045A CA1054142A CA 1054142 A CA1054142 A CA 1054142A CA 229045 A CA229045 A CA 229045A CA 1054142 A CA1054142 A CA 1054142A
- Authority
- CA
- Canada
- Prior art keywords
- bowl
- liquid
- baffles
- tines
- assembly
- 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
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- Mixers Of The Rotary Stirring Type (AREA)
Abstract
ABSTRACT OF THE INVENTION
An agitating whipper equipped with a wire-tines assembly adapted to rotate about an axis moving in an eccentric path with respect to a mixing bowl having a bottom feed port is equipped with baffles fixedly mounted within the cage defined by the tines assembly and spaced in close proximity at their lateral free edges from the tines, the baffles being poised to deflect a liquid suspension or solution in the course of emulsification thereof to thereby promote consistent and controlled mixing and overrun.
An agitating whipper equipped with a wire-tines assembly adapted to rotate about an axis moving in an eccentric path with respect to a mixing bowl having a bottom feed port is equipped with baffles fixedly mounted within the cage defined by the tines assembly and spaced in close proximity at their lateral free edges from the tines, the baffles being poised to deflect a liquid suspension or solution in the course of emulsification thereof to thereby promote consistent and controlled mixing and overrun.
Description
This invention relates to an improved mixing and whipping apparatus and method whereby emulsified ingredients are more consistently whipped to a predictable and controllable volumet-ric overrun.
One of the most common pieces of equipment employed in unit operations is a planetary mixing whipper which may be variously equipped with whips and beater knives or arms opera-tive to effectively hydrate, intermix, whip and eventually generate a uniform pattern of distribution in a liquid medium.
One of the more frequent applications for such devices is food processing wherein emulsions are converted into a high overrun for sale as toppings and like oil-in-water systems wherein air is incorporated to provide a uniform and delicate light texture to a product. In such food applications where the ultimate composition is sold as such, it is imperative that control of the volume of the comestible and like goods be exercised inas-much as such compositions are customarily volumetrically filled and hence require consistent overrun meeting declared weight label tolerances. --So far as is presently known, agitator whippers and methods of employing same are not specially designed to provide such control as would permit a processor to enjoy manufacturing economies by more consistently meeting close overrun tolerances.
Thus, it becomes desirable in manufacturing a topping and like overrun comestible to have a whipper that will serve to generate a predictable overrun by reason of a more consistent viscosity development. -To explain further, the whipping of aqueous suspensions ~ -and solutions and like liquid preparations will achieve a decrease in viscosity as the solids become hydrated. The tines :`' lOS~4Z
on a typical wire whip which turn at high speeds serve to promote overrun and viscosity changes for the liquid medium.
With continued whipping and churning the liquid medium is inclined to partition into a relatively high viscosity phase and a less viscous one. Such phase separation in mixing is not desired since it gives rise to eccentricities in viscosity and unpredictability in whip volume. While whip agitators have been designed with planet~ry movements within the mixing bowl in order to promote uniform mixing, there has nevertheless been a tendency for the liquid phase to segregate into a less viscous and a more viscous condition with consequent unpredictabilities in generating overrun. It would be desirable for quantity production at reduced cost to continuously feed liquid at the bottom of a planetary whipper's bowl and withdraw the whipped product as an overflow from the bowl. But when employing such a system viscosity variations greatly limit the ability to meet manufacturing tolerances as aforesaid.
It is, therefoxe, among the objects of the present inven-tion to ameliorate such eccentricities and variations and provide a method whereby a liquid such as a topping or other aqueous emulsion composition can be consistently aerated to a high overrun state incident to which agitation there will be a more uniform viscosity development. A more specific objective is to provide a continuous whipper agitator which possesses these operating characteristics whereby a liquid medium can be charged to the whipping zone and continuously withdrawn as an overflow at a predictable overrun.
This invention is founded upon the discovery that baffling means can be advantageously located within the locus defined by the rotating tines of a given whip in a planetary whipper.
1054~4Z
In accordance with the present invention, an agitator whipper is provided which comprises a bowl and a tine whipper assembly mounted for planetary movement in said bowl. The assembly comprises a plurality of tines mounted on a common, generally vertical shaft and baffle means also mounted on said shaft within the perimeter defin~d by said tines, said baffle means being of sufficient radial width to intercept, obstruct and deflect liquid ascent within said assembly, said baffle means comprising a plurality of generally plate-shaped baffles, each of said baffles having a leading edge and a trailing edge and being inclined at an acute angle relative to a horizontal plane such that each respective baffle slopes downwardly generally in the direction from its leading edge to the trailing edge thereof, and means for admitting a whippable composition intermediate the bowl wall and said assembly at a location beneath said assembly, whereby said baffle means restricts axial flow within said assembly, whereln the bowl has an entry port proximate the lower extremity thereof adapted to continuously receive a liquid charge and wherein the bowl has an exit port at its upper extremity adapted to continuously overflow liquid .
whipped in said agitator, said apparatus comprising two pairs of said baffles, said pairs being axially spaced sufficiently from one another to permit lower density liquid deflected from a lower baffle pair through the tines to reenter the locus ~-of the rotating whipping tines and be acted upon by a superjacent baffle pair.
According to another aspect of the present invention, a method is provided of whipping by charging liquid to a mixing bowl wherein a tine whipper assembly is mounted for high speed rotation with a planetary movement and creates a whipping zone within the bowl, the improvement ~ .3 ~S~4;~
which comprises creating a plurality of baffling zones for the liquid passing the tines, liquid being caused to enter each of said baffling zones from said whipping zone and being redirected radially back through said whipping zones to a zone external to the locus of the rotating tines at a reduced density whereby said reduced-density liquid rises in the mass thereof, continuing said rotation and movement and causing said risen liquid to reenter and pass the whipping zone to reenter the area within the rotating tines and occupy a second baffling zone superjacent the first zone wherein the liquid is redirected radially and is again returned through the whipping zone at a still lower density.
Referring to the accompanying drawings of the agitator of this invention, Fig. 1 is a front elevation view of a planetary mixer equipped with the whipper of the invention;
Fig. 2 is a side elevation view of the same device;
Fig. 3 is a top plan view with parts broken away at a plane just above the mixing bowl of the device;
Fig. 4 is an enlarged sectional elevation view of the agitator vessel showing the whipping structure in place;
Fig. 5 is a still further enlarged elevational view of the whipping assembly per se;
Fig. 6 is a top plan view of the assembly in Fig. 5 taken along line 6-6; and Fig~ 7 is a perspective view of baffle means in the whipper assembly.
- 3a -1~5~
Referring to Figs. 1-3, the agitator whipper drive and mixing vessel will be seen to comprise a conventional planetary mixer having a base 1 and pedestal 2 mounting a motor 3 driving through a planetary gear train 4 an agitator shaft mount 5 -within bowl 6 mounted on a bowl support 7 adapted to be lifted by lift screw means 8 for spatially adjusting bowl and agitator placement. -Referring particularly to Figs. 4-7 detailing the most preferred form of agitator whipper, it will be noted that the agitator generally comprises a wire whip 10 consisting of a plurality of tines 12 assembled to form upon rotation the locus of a cylinder that converges at one end to a semi-sphere, the tines being permanently anchored at their lower extremity 14 upon shaft extremity 16 and being mounted at their upper ex-tremity or free end upon a disk 18 also fixedly mounted upon shaft 16 for rotation therewith all of which constitutes prior art but which in cooperation with the elements of the present invention are intended to provide a specific operative effect.
The disk 18 has perEorations formed therein for weight reduction and minimizing load upon the whipper assembly per se.
the shaft has mounted thereon a plurality of planar radial baffles 20, each baffle being fixedly mounted upon shaft 16; the baffles may be adjustably mounted if liquids of varying mixing -characteristics are used. The shape of each baffle is such that it has sufficient planar width radially of shaft 16 to intercept, obstruct and deflect flow of liquid as will be described hereinafter. The baffles rotate within the perimeter or confines of whip tines 12 and are spaced at their lateral free edges from the tines. The lower baffles as shown for instance at 22 in the semi-spherical region of the whip-locus -1~5~
are accurately shaped so as to similarly terminate short of the tines but be substantially complementary thereto so that the assembly of baffles in both the cylindrical and semi-spherical section of the whip are in a close proximity at their lateral free edges to the corresponding regions of the tines in the whip assembly.
The baffles rotate in the whip assembly in a counter-clockwise direction as shown in Fig. 6, the whip-assembly being mounted for planetary clockwise rotation within bowl 6 and form-ing what is referred to herein as a whipping zone. The bowl comprises a cylindrical wall portion 26 and a semi-spherical portion 2~. The whip-baffle assembly rotates as seen in Figs.
1-3 in a generally circular path proximate but spaced from the bowl wall as shown in Fig. 4. The liquid such as a topping emulsion is fed continuously to the lower regions of the mixing bowl through port 30. With continuing rotation of tines 12 the emulsion passes therethrough at the semi-spherical regions thereof and is deflected by the lower pair of baffles 22 forming what is referred to herein as a first baffle zone. With continued uniform feeding of emulsion through port 30 the aerated emulsion undergoes an incremental viscosity change as the vessel is filled and continued to be operated as one pro-ceeds from the outer extremity to the inner extremity of the bowl. Thus, the emulsion within the locus of the whip but t proximate the shaft is less viscous than the regions proximate the tines.
Advantageouslyl by virtue of the baffles arrangement as shown, emulsion viscosity irregularities are minimized as the emulsion is intercepted by each of the baffles and is deflected axially downwardly and radially. The emulsion in turn is pumped . ~ . .
: - . , .. , . ~ . . .: . . -l~S4~4Z
or redirected in the direction of the tines and then radially outwardly through the locus defined by the tines. With con-tinued rotation of the shaft, the emulsion overrun increases and it rises within the region intermediate the lateral free edges of the baffles and the bowl wall. With rotation con-tinued further and cavitation induced by the baffles, the -emulsion is reintroduced to within the perimeter of the tines of the whip to again be intercepted in a second baffle zone by a superad~acent baffle pair and is again deflected. Thus, as rotation proceeds and the emulsified composition undergoes progressive density reduction and as successive supervening baffles intercept and deflect the rising emulsion there results -~ -a complete and uniform mixing. The resulting emulsion viscosity is quite uniform. The baffles themselves function to regulate -ascent of the emulsion to a pre-determined height whereat the intended overrun and density reducity is determinable by the ascent of the emulsion within the bowl. Consequently, the emulsion can be withdrawn as an overflor by decantation through a weir generally shown as 32 mounted in an opening in the ves-sel wall 34. The axis of ratation of the wirebaffle assembly and of the bowl is at an acute angle to the vertical in order ' to tilt the bowl and thereby assure positive displacement of the emulsion to and through the weir. So controllable is the overrun the emulsion can be predictably decanted at a given height in wall 26 and correlatable with a specified emulsion overrun.
This permits the agitator-whipper to be operated continu-ously with charge emulsion being introduced through orifice 30 and being continuously withdrawn through overflow weir 32 while at the same time achieving a predictable consistent viscosity, density reduction and overrun.
Overflow is very uniform across the perimeter of the weir opening by reason of the homogenous character and distribution of product.
Baffles 20 and 22 will generally be poised so that a pair of baffles will be mounted at the same level on shaft 16; the baffle planes will intersect at an acute angle with respect to one another (alpha) as well as with respect to the shaft (beta), the shaft intersect angle (beta) as well as the baffle intersect angle (alpha) being functions of the particular emulsion. The respective shaft intersect and baffle intersect angles for each pair of baffles will preferably be the same. In this connection, superjacent pairs of baffles will be mounted on the shaft offset from one another at the lines of intersection of the baf-fle planes. Thus, the planes of a pair of baffles mounted at a given height on the shaft will be at an angle preferably in the order of 90 to the corresponding intersect lines of a super- r jacent baffle pair. In this way, superjacent pairs divide the mixing area into a plurality of mixing and whipping regions, the number of such region being determined by the whipping t required for a given emulsion. Generally, at least two and preferably three baffle pairs will be mounted for rotation with-in the cylindrical locus of the tine-wire assembly and one baffle pair of like shaft-fixation will be located within the hemispherical region of said locus.
Viewed axially as shown in Fig. 5, the deflecting zone of the baffles in a given pair thereof will be spaced preferably from the deflecting zone of an adjacent pair of baffles such that there will be a space axially between superjacent adjoining baffles; this spacing will be a function of the intended and desired mixing, the space between adjacent baffles being sufficient to promote such mixing.
.
1~5~14Z
Although the invention has been described in reference to the foregoing drawings in connection with a particular wire whip configuration, an agitator that is non-cylindrical may similarly -be equipped with a wire whip having different geometric pattern all within the same inventive spirit. Thus the whip may define the locus of a sphere, an ellipsoid, a hemi-ellipsoid or the --envelope of a spiral's rotation. Although not every whip configuration has been tested, a sufficient number of tests have been made to permit the general observations that replacing the standard whippers with a baffle-type whipper of this in-vention results in a decrease in both viscosity and overrun of oil-in-water emulsions with continuous product discharge from the bowl appearing more uniform and product being more consis-tently "scraped" from the bowl sides. Circulation is also improved to a point where "dead" zones of underwhipped emulsion are lessened.
:
One of the most common pieces of equipment employed in unit operations is a planetary mixing whipper which may be variously equipped with whips and beater knives or arms opera-tive to effectively hydrate, intermix, whip and eventually generate a uniform pattern of distribution in a liquid medium.
One of the more frequent applications for such devices is food processing wherein emulsions are converted into a high overrun for sale as toppings and like oil-in-water systems wherein air is incorporated to provide a uniform and delicate light texture to a product. In such food applications where the ultimate composition is sold as such, it is imperative that control of the volume of the comestible and like goods be exercised inas-much as such compositions are customarily volumetrically filled and hence require consistent overrun meeting declared weight label tolerances. --So far as is presently known, agitator whippers and methods of employing same are not specially designed to provide such control as would permit a processor to enjoy manufacturing economies by more consistently meeting close overrun tolerances.
Thus, it becomes desirable in manufacturing a topping and like overrun comestible to have a whipper that will serve to generate a predictable overrun by reason of a more consistent viscosity development. -To explain further, the whipping of aqueous suspensions ~ -and solutions and like liquid preparations will achieve a decrease in viscosity as the solids become hydrated. The tines :`' lOS~4Z
on a typical wire whip which turn at high speeds serve to promote overrun and viscosity changes for the liquid medium.
With continued whipping and churning the liquid medium is inclined to partition into a relatively high viscosity phase and a less viscous one. Such phase separation in mixing is not desired since it gives rise to eccentricities in viscosity and unpredictability in whip volume. While whip agitators have been designed with planet~ry movements within the mixing bowl in order to promote uniform mixing, there has nevertheless been a tendency for the liquid phase to segregate into a less viscous and a more viscous condition with consequent unpredictabilities in generating overrun. It would be desirable for quantity production at reduced cost to continuously feed liquid at the bottom of a planetary whipper's bowl and withdraw the whipped product as an overflow from the bowl. But when employing such a system viscosity variations greatly limit the ability to meet manufacturing tolerances as aforesaid.
It is, therefoxe, among the objects of the present inven-tion to ameliorate such eccentricities and variations and provide a method whereby a liquid such as a topping or other aqueous emulsion composition can be consistently aerated to a high overrun state incident to which agitation there will be a more uniform viscosity development. A more specific objective is to provide a continuous whipper agitator which possesses these operating characteristics whereby a liquid medium can be charged to the whipping zone and continuously withdrawn as an overflow at a predictable overrun.
This invention is founded upon the discovery that baffling means can be advantageously located within the locus defined by the rotating tines of a given whip in a planetary whipper.
1054~4Z
In accordance with the present invention, an agitator whipper is provided which comprises a bowl and a tine whipper assembly mounted for planetary movement in said bowl. The assembly comprises a plurality of tines mounted on a common, generally vertical shaft and baffle means also mounted on said shaft within the perimeter defin~d by said tines, said baffle means being of sufficient radial width to intercept, obstruct and deflect liquid ascent within said assembly, said baffle means comprising a plurality of generally plate-shaped baffles, each of said baffles having a leading edge and a trailing edge and being inclined at an acute angle relative to a horizontal plane such that each respective baffle slopes downwardly generally in the direction from its leading edge to the trailing edge thereof, and means for admitting a whippable composition intermediate the bowl wall and said assembly at a location beneath said assembly, whereby said baffle means restricts axial flow within said assembly, whereln the bowl has an entry port proximate the lower extremity thereof adapted to continuously receive a liquid charge and wherein the bowl has an exit port at its upper extremity adapted to continuously overflow liquid .
whipped in said agitator, said apparatus comprising two pairs of said baffles, said pairs being axially spaced sufficiently from one another to permit lower density liquid deflected from a lower baffle pair through the tines to reenter the locus ~-of the rotating whipping tines and be acted upon by a superjacent baffle pair.
According to another aspect of the present invention, a method is provided of whipping by charging liquid to a mixing bowl wherein a tine whipper assembly is mounted for high speed rotation with a planetary movement and creates a whipping zone within the bowl, the improvement ~ .3 ~S~4;~
which comprises creating a plurality of baffling zones for the liquid passing the tines, liquid being caused to enter each of said baffling zones from said whipping zone and being redirected radially back through said whipping zones to a zone external to the locus of the rotating tines at a reduced density whereby said reduced-density liquid rises in the mass thereof, continuing said rotation and movement and causing said risen liquid to reenter and pass the whipping zone to reenter the area within the rotating tines and occupy a second baffling zone superjacent the first zone wherein the liquid is redirected radially and is again returned through the whipping zone at a still lower density.
Referring to the accompanying drawings of the agitator of this invention, Fig. 1 is a front elevation view of a planetary mixer equipped with the whipper of the invention;
Fig. 2 is a side elevation view of the same device;
Fig. 3 is a top plan view with parts broken away at a plane just above the mixing bowl of the device;
Fig. 4 is an enlarged sectional elevation view of the agitator vessel showing the whipping structure in place;
Fig. 5 is a still further enlarged elevational view of the whipping assembly per se;
Fig. 6 is a top plan view of the assembly in Fig. 5 taken along line 6-6; and Fig~ 7 is a perspective view of baffle means in the whipper assembly.
- 3a -1~5~
Referring to Figs. 1-3, the agitator whipper drive and mixing vessel will be seen to comprise a conventional planetary mixer having a base 1 and pedestal 2 mounting a motor 3 driving through a planetary gear train 4 an agitator shaft mount 5 -within bowl 6 mounted on a bowl support 7 adapted to be lifted by lift screw means 8 for spatially adjusting bowl and agitator placement. -Referring particularly to Figs. 4-7 detailing the most preferred form of agitator whipper, it will be noted that the agitator generally comprises a wire whip 10 consisting of a plurality of tines 12 assembled to form upon rotation the locus of a cylinder that converges at one end to a semi-sphere, the tines being permanently anchored at their lower extremity 14 upon shaft extremity 16 and being mounted at their upper ex-tremity or free end upon a disk 18 also fixedly mounted upon shaft 16 for rotation therewith all of which constitutes prior art but which in cooperation with the elements of the present invention are intended to provide a specific operative effect.
The disk 18 has perEorations formed therein for weight reduction and minimizing load upon the whipper assembly per se.
the shaft has mounted thereon a plurality of planar radial baffles 20, each baffle being fixedly mounted upon shaft 16; the baffles may be adjustably mounted if liquids of varying mixing -characteristics are used. The shape of each baffle is such that it has sufficient planar width radially of shaft 16 to intercept, obstruct and deflect flow of liquid as will be described hereinafter. The baffles rotate within the perimeter or confines of whip tines 12 and are spaced at their lateral free edges from the tines. The lower baffles as shown for instance at 22 in the semi-spherical region of the whip-locus -1~5~
are accurately shaped so as to similarly terminate short of the tines but be substantially complementary thereto so that the assembly of baffles in both the cylindrical and semi-spherical section of the whip are in a close proximity at their lateral free edges to the corresponding regions of the tines in the whip assembly.
The baffles rotate in the whip assembly in a counter-clockwise direction as shown in Fig. 6, the whip-assembly being mounted for planetary clockwise rotation within bowl 6 and form-ing what is referred to herein as a whipping zone. The bowl comprises a cylindrical wall portion 26 and a semi-spherical portion 2~. The whip-baffle assembly rotates as seen in Figs.
1-3 in a generally circular path proximate but spaced from the bowl wall as shown in Fig. 4. The liquid such as a topping emulsion is fed continuously to the lower regions of the mixing bowl through port 30. With continuing rotation of tines 12 the emulsion passes therethrough at the semi-spherical regions thereof and is deflected by the lower pair of baffles 22 forming what is referred to herein as a first baffle zone. With continued uniform feeding of emulsion through port 30 the aerated emulsion undergoes an incremental viscosity change as the vessel is filled and continued to be operated as one pro-ceeds from the outer extremity to the inner extremity of the bowl. Thus, the emulsion within the locus of the whip but t proximate the shaft is less viscous than the regions proximate the tines.
Advantageouslyl by virtue of the baffles arrangement as shown, emulsion viscosity irregularities are minimized as the emulsion is intercepted by each of the baffles and is deflected axially downwardly and radially. The emulsion in turn is pumped . ~ . .
: - . , .. , . ~ . . .: . . -l~S4~4Z
or redirected in the direction of the tines and then radially outwardly through the locus defined by the tines. With con-tinued rotation of the shaft, the emulsion overrun increases and it rises within the region intermediate the lateral free edges of the baffles and the bowl wall. With rotation con-tinued further and cavitation induced by the baffles, the -emulsion is reintroduced to within the perimeter of the tines of the whip to again be intercepted in a second baffle zone by a superad~acent baffle pair and is again deflected. Thus, as rotation proceeds and the emulsified composition undergoes progressive density reduction and as successive supervening baffles intercept and deflect the rising emulsion there results -~ -a complete and uniform mixing. The resulting emulsion viscosity is quite uniform. The baffles themselves function to regulate -ascent of the emulsion to a pre-determined height whereat the intended overrun and density reducity is determinable by the ascent of the emulsion within the bowl. Consequently, the emulsion can be withdrawn as an overflor by decantation through a weir generally shown as 32 mounted in an opening in the ves-sel wall 34. The axis of ratation of the wirebaffle assembly and of the bowl is at an acute angle to the vertical in order ' to tilt the bowl and thereby assure positive displacement of the emulsion to and through the weir. So controllable is the overrun the emulsion can be predictably decanted at a given height in wall 26 and correlatable with a specified emulsion overrun.
This permits the agitator-whipper to be operated continu-ously with charge emulsion being introduced through orifice 30 and being continuously withdrawn through overflow weir 32 while at the same time achieving a predictable consistent viscosity, density reduction and overrun.
Overflow is very uniform across the perimeter of the weir opening by reason of the homogenous character and distribution of product.
Baffles 20 and 22 will generally be poised so that a pair of baffles will be mounted at the same level on shaft 16; the baffle planes will intersect at an acute angle with respect to one another (alpha) as well as with respect to the shaft (beta), the shaft intersect angle (beta) as well as the baffle intersect angle (alpha) being functions of the particular emulsion. The respective shaft intersect and baffle intersect angles for each pair of baffles will preferably be the same. In this connection, superjacent pairs of baffles will be mounted on the shaft offset from one another at the lines of intersection of the baf-fle planes. Thus, the planes of a pair of baffles mounted at a given height on the shaft will be at an angle preferably in the order of 90 to the corresponding intersect lines of a super- r jacent baffle pair. In this way, superjacent pairs divide the mixing area into a plurality of mixing and whipping regions, the number of such region being determined by the whipping t required for a given emulsion. Generally, at least two and preferably three baffle pairs will be mounted for rotation with-in the cylindrical locus of the tine-wire assembly and one baffle pair of like shaft-fixation will be located within the hemispherical region of said locus.
Viewed axially as shown in Fig. 5, the deflecting zone of the baffles in a given pair thereof will be spaced preferably from the deflecting zone of an adjacent pair of baffles such that there will be a space axially between superjacent adjoining baffles; this spacing will be a function of the intended and desired mixing, the space between adjacent baffles being sufficient to promote such mixing.
.
1~5~14Z
Although the invention has been described in reference to the foregoing drawings in connection with a particular wire whip configuration, an agitator that is non-cylindrical may similarly -be equipped with a wire whip having different geometric pattern all within the same inventive spirit. Thus the whip may define the locus of a sphere, an ellipsoid, a hemi-ellipsoid or the --envelope of a spiral's rotation. Although not every whip configuration has been tested, a sufficient number of tests have been made to permit the general observations that replacing the standard whippers with a baffle-type whipper of this in-vention results in a decrease in both viscosity and overrun of oil-in-water emulsions with continuous product discharge from the bowl appearing more uniform and product being more consis-tently "scraped" from the bowl sides. Circulation is also improved to a point where "dead" zones of underwhipped emulsion are lessened.
:
Claims (4)
1. An agitator whipper comprising a bowl and a tine whipper assembly mounted for planetary movement in said bowl, said assembly comprising a plurality of tines mounted upon a common, generally vertical shaft and baffle means also mounted on said shaft within the perimeter defined by said tines, said baffle means being of sufficient radial width to intercept, obstruct and deflect liquid ascent within said assembly, said baffle means comprising a plurality of generally plate-shaped baffles, each of said baffles having a leading edge and a trailing edge and being inclined at an acute angle relative to a horizontal plane such that each respective baffle slopes downwardly generally in the direction from its leading edge to the trailing edge thereof, and means for admitting a whippable composition intermediate the bowl wall and said assembly at a location beneath said assembly, whereby said baffle means restricts axial flow within said assembly, wherein the bowl has an entry port proximate the lower extremity thereof adapted to continuously receive a liquid charge and wherein the bowl has an exit port at its upper extremity adapted to continuously overflow liquid whipped in said agitator, said apparatus comprising two pairs of said baffles, said pairs being axially spaced sufficiently from one another to permit lower density liquid deflected from a lower baffle pair through the tines to reenter the locus of the rotating whipping tines and be acted upon by a superjacent baffle pair.
2. Apparatus as claimed in claim 1, wherein the baffles are arranged in at least one pair of baffles, wherein the respective baffles are disposed to radially opposite sides of said shaft such that planes generally coincident with the respective baffles of each pair intersect each other at an acute angle.
3. In the method of whipping by charging liquid to a mixing bowl wherein a tine whipper assembly is mounted for high speed rotation with a planetary movement and creates a whipping zone within the bowl, the improvement which comprises creating a plurality of baffling zones for the liquid passing the tines, liquid being caused to enter each of said baffling zones from said whipping zone and being redirected radially back through said whipping zones to a zone external to the locus of the rotating tines at a reduced density whereby said reduced-density liquid rises in the mass thereof, continuing said rotation and movement and causing said risen liquid to reenter and pass the whipping zone to reenter the area within the rotating tines and occupy a second baffling zone superjacent the first zone wherein the liquid is redirected radially and is again returned through the whipping zone at a still lower density.
4. The method of claim 3 wherein the liquid is continuously charged to the bottom of the bowl and is continu-ously withdrawn as an overflow from the top of the bowl.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA229,045A CA1054142A (en) | 1975-06-11 | 1975-06-11 | Caged impellors in a bottom fed whipper appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA229,045A CA1054142A (en) | 1975-06-11 | 1975-06-11 | Caged impellors in a bottom fed whipper appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1054142A true CA1054142A (en) | 1979-05-08 |
Family
ID=4103308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA229,045A Expired CA1054142A (en) | 1975-06-11 | 1975-06-11 | Caged impellors in a bottom fed whipper appliance |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1054142A (en) |
-
1975
- 1975-06-11 CA CA229,045A patent/CA1054142A/en not_active Expired
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