Patent Grant
10730024
The present disclosure relates in general to systems and methods for micro dosing.
One prior colorant is based on a natural silicate known as mica combined with titanium dioxide. This creates a range of colors with metallic sheen, from silver to gold. Titanium dioxide coated mica powder (herein referred to as “colored mica”) is easy to apply and is widely used for various food applications (e.g., the coating of jelly beans, gums, the decoration of chocolate, biscuits, ice-cream and beverages). Colored mica can be mixed with various liquids to create a shiny and shimmering finish to the liquid. This gives the beverage a distinctive look and creates great consumer appeal visually. However, colored mica contaminates the beverage process and bottle filling equipment as it is extremely difficult or impossible to remove. There are various existing attempts at solutions to try and overcome this problem which will be discussed below. However, none of the existing attempts have proven satisfactory as all have disadvantages that render them unsatisfactory.
One prior attempt at a solution is to use dedicated production equipment for liquids requiring colored mica and separate equipment for liquids that do not require colored mica. This avoids cross-product contamination due to residual suspended solids from beverages with colored mica. However, this requires additional equipment at an economically unfeasible cost. This also greatly underutilizes the equipment for both processes.
Another prior approach requires aggressive, invasive and expensive cleaning of production equipment between products that require colored mica and those that do not. However, this adds to cost and time to disassemble, clean and/or replace components such as seals and gaskets in processing and bottle filling equipment that have been contaminated.
Some manufacturers add mixture modifiers such as gum or sugar to hold the solid particles in suspension for bottle filling. This may eliminate some of the difficulty of cleaning the equipment since residual solids would be prevented from settling in the equipment. However, the addition of solution modifiers creates sanitation issues due to potential pests and microbes and may also create a less temperature-stable mixture. Furthermore, there is an additional cost involved in cleaning and operational complexity in removing these modifiers from the equipment. Further, once material like colored mica is introduced into a filling system, it is virtually impossible to remove.
Another attempt at a solution is to use recirculating filling systems that maintain fluid velocities at all times to prevent colored mica from settling in the equipment. However, these systems are expensive. Additionally, these systems may stop unexpectedly (e.g., due to power losses) that leads to colored mica settling and contaminating the process equipment.
Therefore, there is a pressing need for a system and method for addition of materials that are difficult to clean and/or clear from a filling system. The present system and method solves these problems with a micro dosing system and method. One of the advantages of micro dosing is to avoid the contamination of a primary filling or supply system.
The foregoing examples of the related art and limitations related therewith are intended to be illustrative and not exclusive. Other limitations of the related art will become apparent to those of skill in the art upon a reading of the specification and a study of the drawings.
The following aspects and embodiments thereof described and illustrated below are meant to be exemplary and illustrative, not limiting in scope.
A system and method of micro dosing is disclosed. The system and method is particularly useful with bottling and conveying systems. The system includes a supply tank designed to keep suspended solids in a homogenous mixture; a portable dosing assembly to inject micro-doses of the mixture into pre-filled bottles or containers; a recirculation assembly to circulate the mixture from the supply tank to the portable dosing assembly and back to the supply tank; a power and controls operation assembly to supply the system with power, to provide the system with electromechanical control and to provide a user interface; and a portable or fixed stand to hold the supply tank, the portable dosing assembly, the recirculation assembly and the power and controls operation assembly.
In one embodiment, a micro-dosing system is contemplated. In a preferred embodiment, the micro dosing system is portable. The system includes a supply or mixing tank, a dosing assembly, a recirculation assembly, a power and/or control assembly, and a dosing stand. In an embodiment, the portable dosing assembly includes a dosing pump or servo doser to inject micro-doses of the micro dose blend into containers such as bottles pre-filled with a substance to which the micro dose is added.
In an embodiment, the recirculation assembly is fluidly coupled to the supply tank and the dosing assembly. In an embodiment, the recirculation assembly is configured to circulate the micro dose blend from the supply tank to the dosing assembly and/or back to the supply tank. In an embodiment, the recirculation assembly comprises a product pump, which may be a peristaltic pump, for drawing the dose blend from the supply tank and pumping the dose blend to the dosing assembly. In an embodiment, the product pump includes a variable-frequency drive motor for controlling the rotational speed of the peristaltic pump. In an embodiment, the recirculation assembly includes an umbilical bundle for fluid and/or wiring transport.
In an embodiment, the power and/or control operation assembly is configured to supply the system with power, to provide the system with an electromechanical control, and/or to provide a user interface. In an embodiment, the power and controls operation assembly includes a power supply. In an embodiment, the power and controls operation assembly includes a compact logic programmable logic controller for providing the system with electromechanical control. In an embodiment, the power and controls operation assembly includes a human-machine interface (HMI) control panel for providing a user interface. In one embodiment, the HMI control panel includes an operating and monitoring screen for user-controlled operation and monitoring.
In an embodiment, the umbilical bundle includes a dose supply tube fluidly coupled to the supply tank and the dosing assembly, for supplying the dose blend from the supply tank to the dosing assembly; a dose return tube fluidly coupled to the dosing assembly and the supply tank, for returning the mixture from the dosing assembly to the supply tank; and a bottle sensor cable for automating an electromechanical control of a bottle sensor photo eye.
In an embodiment, the dosing stand is configured to hold the supply tank, the dosing assembly, the recirculation assembly, and/or the power and controls operation assembly. In a further embodiment, the dosing stand is portable and comprises at least two wheels. In another embodiment, the dosing stand comprises at least two legs for securing the dosing stand in a working position. In yet another embodiment, the dosing stand comprises a hose rack for securing or holding an umbilical bundle, for example.
In an embodiment, the supply tank includes an agitator or mixer for mixing and/or blending the micro dose blend. Preferably, the agitator keeps the micro dose blend in a suspension. In another embodiment, the agitator includes a variable-frequency drive motor for controlling the rotational speed of the agitator. In a further embodiment, the supply tank includes a hinged lid for access to the supply tank, e.g., for adding the dose blend and/or cleaning. In one embodiment, the hinged lid includes at least three sealed ports having a discharge outlet, a return inlet, and a filtered vent.
In an embodiment, the dosing assembly includes a mobile stand for holding pre-filled bottles or containers. In another embodiment, the dosing pump is positioned on a support stand coupled to the dosing stand. In a further embodiment, the dosing pump further comprises a servo controller to inject the correct or desired amount of micro dose blend into the pre-filled bottles by controlling the position and/or speed of the dosing pump. In yet another embodiment, the dosing assembly includes a bottle sensor photo eye for detecting an opening of a pre-filled bottle.
In another embodiment, a method for micro-dosing individual bottles or containers is contemplated. In an embodiment, the method includes (i) mixing and/or blending a solid material in a liquid to form a homogenous suspension in a supply tank, (ii) circulating the suspension from the supply tank to a dosing assembly, (iii) injecting micro doses of the suspension into pre-filled bottles with a portable dosing, and (iv) circulating the suspension not injected back to the supply tank. In an embodiment, the method further includes agitating the homogeneous suspension in the supply tank. In another embodiment, the method further includes adjusting a flow of the suspension through the system to maintain the solid in suspension. In a further embodiment, the method includes detecting the presence of an opening of the pre-filled bottle prior to injecting the micro doses into pre-filled bottles or containers.
The above and other preferred features, including various novel details of implementation and combination of events, will now be more particularly described with reference to the accompanying figures and pointed out in the claims. It will be understood that the particular system and methods described herein are shown by way of illustration only and not as limitations. As will be understood by those skilled in the art that the principles and features described herein may be employed in various and numerous embodiments without departing from the scope of the invention. As can be appreciated from the foregoing and following description, each and every feature described herein, and each and every combination of two or more of such features, is included within the scope of the present disclosure provided that the features included in such a combination are not mutually inconsistent. In addition, any feature or combination of features may be specifically excluded from any embodiment of the present invention.
The accompanying figures, which are included as part of the present specification, illustrate the presently preferred embodiments and together with the general description given above and the detailed description of the preferred embodiments given below serve to explain and teach the principles described herein.
It will be appreciated that for simplicity and clarity of illustration, where considered appropriate, reference numerals may be repeated among the figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the example embodiments described herein. However, it will be understood by those of ordinary skill in the art that the example embodiments described herein may be practiced without these specific details.
Measurements, sizes, amounts, etc., are often presented herein in a range format. The description in range format is merely for convenience and brevity and should not be construed as an inflexible limitation on the scope of the invention. Accordingly, the description of a range should be considered to have specifically disclosed all the possible subranges as well as individual numerical values within that range. For example, description of a range such as 10-20 inches should be considered to have specifically disclosed subranges such as 10-11 inches, 10-12 inches, 10-13 inches, 10-14 inches, 11-12 inches, 11-13 inches, etc.
The mixing-blending-supply tank system 102 includes a supply tank 109 filled with a dose blend 110, a lid 111, at least two sealed ports 112a, 112b, and a filtered vent 112c. In one embodiment, the lid 111 is hinged. The supply tank 109 may be any suitable size required for holding a suitable amount of the dose blend. In embodiments, the supply tank is about a 0.1-25 gallon supply tank. The supply tank is a 10 gallon supply tank, according to one specific, but non-limiting, embodiment. In other embodiments, the supply tank holds about 1-20, about 2-20, about 5-20, about 1-5, about 1-10, about 5-10, about 10-15, or about 10-20 gallons. Suitable supply tanks may be fabricated by Laciny Bros, Inc. (St. Louis, Mo.) or JVNW, Inc. (Canby, Oreg.).
In one non-limiting embodiment, the dose blend 110 is a homogenous suspension of the dose material in a suitable liquid phase. In one non-limiting embodiment, the dose blend 110 comprises colored mica particles in a mixture of alcohol, water and/or citric acid. It will be appreciated that the dose blend 110 may be a suspension of other suspended solids in a mixture of other liquids, according to other embodiments. The dose blend may comprise any liquid or material that would require cleaning between use of a filling system. In particular, the dose blend may be any liquid or material that requires extensive or excessive cleaning to remove the material from a filling system before using the system with a further material. In other embodiments, the dose blend may be any liquid or material that would contaminate a further material used in the filling system. The system will be described hereafter with regard to a suspension of colored mica although it will be appreciated that the description is applicable to any suitable dose blend.
In an embodiment, the supply tank 109 includes a removable and/or hinged lid 111 for adding materials and/or cleaning. The lid 111 further includes at least two sealed ports 112a and 112b for the discharge and return of the dose blend and a filtered inlet 112c to atmosphere or inert gas 110. It will be appreciated that the sealed ports 112a, 112b and/or filtered inlet 112c may be positioned in the supply tank 109 as well as in the lid 111. The supply tank 109 preferably includes an agitator 113. In one embodiment, the agitator 113 has a variable-speed motor (such as an AC-VFD or DC with speed controller) to provide the various speeds preferred for mixing ingredients and/or maintaining a homogenous mixture for extended times and/or for cleaning the system. It will be appreciated that any suitable agitator and/or variable speed motor may be included as part of the tank design and manufacture. In embodiments, the agitator may be one as manufactured by Laciny or JVNW. The VFD motor controls the rotational speed of an alternating current (AC) electric motor by controlling the frequency of the electrical power supplied to the motor. This keeps the dose blend 110 in motion by shaking and/or stirring the supply tank 109 so that the colored mica powder will be continuously and/or homogenously suspended in the dose blend 110. The agitator 113 may include any motor system that maintains the colored mica particles suspended in the dose blend 110.
The recirculation assembly 103 includes a pump 114, such as a peristaltic pump, preferably with a variable speed controlled motor. Suitable pumps are available from Watson-Marlow Pumps. A flow assembly may maintain the mixture flow in such a way that the heavy mica particles are kept in suspension with a sufficient mixture velocity. Higher mixture velocity prevents the particles from settling. Sufficient mixture supply pressure is required to the dosing pump infeed to provide consistent dose volumes in each bottle. This is accomplished with designed maximum clearances and minimum flow velocities to direct, regulate and control, and/or maintain the homogenous mixture flow from the supply tank to the portable dosing assembly and back to the supply tank. The hose rack 108 holds at least a portion of the umbilical bundle, according to one embodiment. The umbilical bundle typically includes two sections of dose supply tubes or hoses 116a and 116b, a dose return tube or hose 117, and a bottle sensor cable 118. The dose supply tube 116b is connected to the dosing pump 121 by any suitable means including, but not limited to, a feed screw 119. In another embodiment, the dose supply tube 116b is connected to the dosing pump via an assembly of parts 119. Any suitable connection(s) between the second section of the dose supply tube 116b and the dosing pump 121 are contemplated. One exemplary connection assembly is shown in
As noted above, the dose supply tube 116b may be operatively and/or fluidly connected or coupled to the dosing pump 121 by any suitable coupling or connector. An exemplary connection assembly is shown in
The portable dosing assembly 104 preferably includes a mobile stand 120 and a dosing pump 121 fixed on a filler-closure support stand 122. In one embodiment, the mobile stand moves the pre-filled bottles 124 towards the dosing pump 121 after they convey from a filling machine. The dosing system 121 includes a bottle sensor cable 118 and powers a bottle sensor 123 such as a photo eye. One suitable sensor is available from Allen-Bradley. The sensor 123 detects the presence of a bottle opening 125 before the dosing pump 121 injects micro-doses of the dose blend 110 as an existing conveying system advances a pre-filled bottle 124. The pre-filled bottles 124 may be filled to nearly 100% (e.g., 99.5% full), according to one embodiment. It will be appreciated that the bottle may be filled more or less depending on the size of the container and/or the amount of dose blend added. According to one embodiment, the dosing pump 121 may make use of a servo controller that uses error-sensing negative feedback to correct and control the position, speed and/or other parameters so that the correct amount of micro-doses are injected into the bottles 124 (such as with the Hibar P series metering pump). It will be appreciated that any volume of micro-dose may be injected depending on the material injected. As an example, the Hibar P series pump is capable of dispensing 0 ml to about 20 ml. It will further be appreciated that the speed of the conveyer will affect the maximum dose size. A conveyer with a lower speed allows for a larger dose while a conveyer with a higher speed allows for a smaller dose. In non-limiting embodiments, the micro dose comprises about 0.1-5 ml of the dose blend. In further embodiments, the micro dose comprises about 0.5-1 ml, about 0.5-5 ml, or about 1-5 ml of the dose blend. The dosed bottles are conveyed via a feed screw to the closure machine (such as a corker or capper).
The power controls operation assembly 105 includes a power supply 126, a compact logics programmable logic controller (PLC) 127, and/or a human-machine interface (HMI) control panel 128 with an operating and monitoring screen, according to one embodiment. One suitable PLC and HMI control panel may be obtained from Allen Bradley. The power controls operation assembly 105 provides the dosing system 100 with power, electromechanical control and/or a user interface. The PLC 127 provides electromechanical control of the bottle sensor 123 and dosing pump 121 on the assembly line and is generally immune to electronic noise and resistant to vibration and impact. The HMI control panel 128 provides a user interface between the user and the dosing system 100 for controlled operation and monitoring.
The mixing tank 402 is filled with a dose blend and includes at least two sealed ports 412a, 412b for connecting hoses. The mixing tank 402 is also connected to a tank flash overflow 413 and a check valve 414. The mixing tank 402 may be any suitable size required for holding a suitable amount of the dose blend. In embodiments, the mixing tank is about a 0.1-25 gallon supply tank. The mixing tank is a 15 gallon tank, according to one specific, but non-limiting, embodiment. In other embodiments, the mixing tank holds about 1-20, about 2-20, about 5-20, about 1-5, about 1-10, about 5-10, about 10-15, or about 10-20 gallons. Suitable tanks may be fabricated by Laciny Bros, Inc. (St. Louis, Mo.) or JVNW, Inc. (Canby, Oreg.).
In one non-limiting embodiment, the dose blend is a homogenous suspension of the dose material in a suitable liquid phase. In one non-limiting embodiment, the dose blend includes colored mica particles in a mixture of alcohol, water and/or citric acid. It will be appreciated that the dose blend may be a suspension of other suspended solids in a mixture of other liquids, according to other embodiments. The dose blend may comprise any liquid or material that would require cleaning between use of a filling system. In particular, the dose blend may be any liquid or material that requires extensive or excessive cleaning to remove the material from a filling system before using the system with a further material. In other embodiments, the dose blend may be any liquid or material that would contaminate a further material used in the filling system. The system will be described hereafter with regard to a suspension of colored mica although it will be appreciated that the description is applicable to any suitable dose blend.
As shown in
The recirculation assembly 403 includes a product pump 416, such as a peristaltic pump, preferably with a variable speed controlled motor. Suitable pumps are available from Watson-Marlow Pumps. A flow assembly may maintain the mixture flow in such a way that the heavy mica particles are kept in suspension with a sufficient mixture velocity. Higher mixture velocity prevents the particles from settling. Sufficient mixture supply pressure is required to the dosing pump infeed to provide consistent dose volumes in each bottle. This is accomplished with designed maximum clearances and minimum flow velocities to direct, regulate and control, and/or maintain the homogenous mixture flow from the supply tank to the portable dosing assembly and back to the supply tank.
The system includes a concentrated dose hose 417. The concentrated dose hose 417 is connected to the product pump 416 by any suitable means including, but not limited to, a sanitary compression clamp 601 and hose clamp 601. In another embodiment, the concentrated dose hose 417 is connected to the product pump via an assembly of parts. A first end of the concentrated dose hose 417 transports the dose blend from the mixing tank 402 to the product pump 416 and then the dose blend is transported from the product pump 416 to a servo doser 421. The product pump 416 draws the dose blend from the mixing tank 402 through the first end of the concentration dose hose and pumps it through the hose in the direction toward the servo doser 421 as shown in the flow direction of the dose blend in
As shown in
As noted above, the concentration dose hose 417 may be operatively and/or fluidly connected or coupled to the servo doser 421 by any suitable coupling or connector. An exemplary connection assembly is shown in
In one embodiment, the servo dosing pump 421 is connected to the mobile stand 101 through a height adjust assembly 707 as shown in
The mobile stand moves a pre-filled bottle 701 towards the servo doser 421 after they convey from a filling machine. The system includes a sensor having a bottle sensor cable 702 and a bottle sensor reflector 703. One suitable sensor is available from Allen-Bradley. The sensor detects the position of a bottle opening before the servo doser 421 injects micro-doses of the dose blend as an existing conveying system advances a pre-filled bottle 701. The pre-filled bottles 701 may be filled to nearly 100% (e.g., 99.5% full), according to one embodiment. It will be appreciated that the bottle may be filled more or less depending on the size of the container and/or the amount of dose blend added. According to one embodiment, the servo doser 421 may make use of a servo controller that uses error-sensing negative feedback to correct and control the position, speed and/or other parameters so that the correct amount of micro-doses are injected into the bottles 701 (such as with the Hibar P series metering pump). It will be appreciated that any volume of micro-dose may be injected depending on the material injected. As an example, the Hibar P series pump is capable of dispensing 0 ml to about 20 ml. It will further be appreciated that the speed of the conveyer will affect the maximum dose size. A conveyer with a lower speed allows for a larger dose while a conveyer with a higher speed allows for a smaller dose. In non-limiting embodiments, the micro dose comprises about 0.1-5 ml of the dose blend. In further embodiments, the micro dose comprises about 0.5-1 ml, about 0.5-5 ml, or about 1-5 ml of the dose blend. The dosed bottles are conveyed via a feed screw to the closure machine (such as a corker or capper).
In one embodiment the nozzle 713 design utilizes a uniform orifice with a diameter of about 0.062 Inch. The selection of nozzle diameter and taper are dependent upon the viscosity of the micro dose blend and the viscosity of the liquid in the dosed bottle. When a dose is delivered a smaller orifice will cause the dose to be delivered at a higher pressure which may aid in preventing back splash in liquids near the viscosity of water. In further embodiments, nozzle orifices of about 0.093, 0.125, 0.156 and 0.187 are used to provide the optimum dose profile.
According to one embodiment, dripping from the nozzle 713 is limited by creating a minimal suck back on the servo dosing pump 416 after the dose is delivered. When the dose is delivered there is period near the end of the delivery where the servo pump is decelerating, near the end of the deceleration the micro dose no longer has sufficient velocity to escape the nozzle and begins to pool on the surface. Once the servo pump has stopped it will reverse slightly to pull this excess material back into the nozzle to prevent a drip.
In one embodiment the dosing head is affixed to a slide assembly 712 as shown in
In operation it may be required to take samples of the dose blend for analysis or inspection. In one embodiment a sanitary sample valve 603 is included in the concentrator dose return line 417 as shown in
The tank may contain a sanitary discharge valve 801 and secondary diaphragm pump 802 that is used for evacuating the system after a production run and sanitizing the system as shown in
In another embodiment an optical encoder 901 may be added to the control system to further enhance the accuracy of the dose delivery within the opening of the bottle as shown in
According to one embodiment, a process for micro-dosing individual bottles 701 begins with filling the mixing tank 402 with dose blend. In one embodiment, the mixing tank is filled manually, via measuring implements from bulk drums, buckets, bags and/or tot bins. The product pump 416 draws the dose blend from the mixing tank through the concentration dose hose 417 and delivers it to the servo doser 421. Hence, the servo doser is filled continuously with the dose blend from the mixing tank. After the pre-filled bottles convey through a filling machine, the sensor, which is attached to the dosing pump, determines if a bottle is detected. If the sensor detects the presence of a bottle, the dosing pump injects a micro-dose of colored mica into the bottle 701. If a bottle is not detected, the dose blend flows through the dose return tube back to the mixing tank 402 where the process is repeated. This ensures that there is a continuous flow of the homogenous dose blend from the supply tank to the dosing pump so that the dosing pump injects a micro-dose of dose blend into each individual pre-filled bottle whenever the sensor detects a bottle.
The example embodiments have been described herein above regarding the maintaining of suspended colored mica particles in a mixture in a batching mixing-blending-supply tank, supplying the colored mica mixture via a pumped, agitated recirculation system to a dosing pump, which is used to inject micro doses into moving pre-filled bottles after they convey from a filling machine and prior to bottle closure. Various modifications to and departures from the disclosed example embodiments will occur to those having ordinary skill in the art. For example, mixtures with other suspended solids can be supplied to a dosing pump via a pumped, agitated recirculation system.
While a number of exemplary aspects and embodiments have been discussed above, those of skill in the art will recognize certain modifications, permutations, additions and sub-combinations thereof. It is therefore intended that the following appended claims and claims hereafter introduced are interpreted to include all such modifications, permutations, additions and sub-combinations as are within their true spirit and scope.
This application is a continuation-in-part of U.S. application Ser. No. 14/733,770, filed Jun. 8, 2015, which is a divisional of U.S. application Ser. No. 13/594,675, filed on Aug. 24, 2012, which are hereby incorporated by reference.
| Number | Name | Date | Kind |
|---|---|---|---|
| 2915023 | Rapaport | Dec 1959 | A |
| 6544109 | Moore | Apr 2003 | B1 |
| 10011375 | Miller | Jul 2018 | B1 |
| 20100224256 | Tseng | Sep 2010 | A1 |
| Number | Date | Country | |
|---|---|---|---|
| 20170056847 A1 | Mar 2017 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 13594675 | Aug 2012 | US |
| Child | 14733770 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 14733770 | Jun 2015 | US |
| Child | 15348738 | US |
