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Publication numberUS3819158 A
Publication typeGrant
Publication dateJun 25, 1974
Filing dateAug 17, 1972
Priority dateAug 17, 1972
Publication numberUS 3819158 A, US 3819158A, US-A-3819158, US3819158 A, US3819158A
InventorsJackson A, Sharpe A
Original AssigneeLever Brothers Ltd
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Devices for blending materials
US 3819158 A
Abstract
A device for blending materials, particularly for the preparation of samples for bacteriological analysis, where a bag containing a sample is subjected to a kneading action while held on a backing plate.
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Description  (OCR text may contain errors)

United States Patent [191 11] 3,819,158 Sharpe et al. June 25, 1974 DEVICES FOR BLENDING MATERIALS [75] Inventors: Anthony Nelson Sharpe; Adrian 1 References Cited Keith Jackson, both of Rushden, UNITED STATES PATENTS England 2,406,403 8/1946 Rogers 259/72 x [73] Assignee: Lever Brothers Company, New 3,141,221 7/1964 Faulls 206/47 A York, NY.

Primary Examiner-Harvey C. Hornsby [22] Flled' 1972 Assistant Examiner-A1an I. Cantor [21 Appl. No.: 281,594 Attorney, Agent, or Firm-Lever Brothers Company [30] Foreign Application Priority Data [57] v ABSTRACT Sept. 6, 1971 Great Britain 41395/71 A device for blending materials, particularly for thg preparation of samples for bacteriological analysis, U-S. A, where a bag ontaining a ample is subjgcted to a [51] Int. Cl B011 11/00 k di g a tion while held on a backing plate, [58] Field of Search 259/72; 100/210; 206/47 A;

211 2 g3 4 4 Claims, 2 Drawing Figures 1 DEVICES FOR BLENDING MATERIALS This invention relates to devices for blending materials e. g., mixing components of a mixture or homogenising single components. The materials may be liquids or semi-liquid matter, and in some cases solids, or powders or evengases. The invention is particularly concemed with the preparation of samples for bacteriological or chemical testing, but may also be used for the preparation of blended foods for example batters, pastries, sauces, baby foods and for the mixing of glues or paints or animal feeds additives.

Conventionally such materials are mixed in devices known as liquidisers or blenders consisting of a container usually standing on top of an electric motor and having two or three paddle/blades within the container which are driven at high speed by the motor to subdivide and intimately mix the contents of the container. Such devices are relatively costly, particularly where high standards of bacteriological cleanliness are required, and, in the preparation of bacteriological samples, have to be stripped down and cleaned before and after use and even heat sterilised in some cases. In laboratories where bacteriological testing is carried out on a relatively large scale, a large stock of these devices is required so that sufficient samples can be processed in any working day.

The present invention is concerned with providing such a device which is simpler, cheaper and quicker to bring into operation, particularly for bacteriology.

Accordingly the present invention provides a device for blending materials comprising a holder to hold a flexible container containing a material to be blended; and a motor driven kneading means which is arranged to apply a kneading action to the container walls to homogenise its contents. The kneading means may comprise beaters, rollers or wheels either singly or in multiples whichare arranged to act on the walls of the flexible container to apply forces to the material within the container. Preferably the holder is arranged to carry a container in the form of an open mouth bag, e.g., of plastics material, and comprises an elongate clamp for holding the bag during the kneading action. Conveniently, the clamp means will also provide a temporary seal to the bag during kneading. Thus, in the device in accordance with the invention no moving parts are required within the container within which the sample is carried and a cheap form of container which can be discarded after use may be used. For example a stock of plastic bags may be carried and the whole stock may be heat sterilised before use and then each one is turn may be discarded after it has been used. One advantage of this is that a stock of such bags takes up so little space; 1,000 bags may form a pile less than cms high and is inexpensive. Moreover sterilisation for re-use is simply a question of replacing the bag.

Preferably the device comprises a backing plate which co-operates, preferably by being pivoted, with said clamping means to clamp the bag and is arranged to support the bag against the action of each beater during kneading. The plate may carry a resilient covering eg of rubber, to absorb shocks during kneading.

Preferably for the mixing of food and bacteriological samples and powders the device comprises a pair of beaters having operational surfaces parallel to said backing plate which act on different areas of the container and being arranged to provide kneading while mutually out of phase. Thus, material in the container will be forced continually from one area of the bag into the other and then back again rapidly and thus will be subjected to shearing forces to provide intimate mixing, as well as crushing forces to break down any larger pieces.

An embodiment of the invention will now be described by way of example with reference to the accompanying diagrammatic drawings in whicn,

FIG. 1 shows a schematic view of the device prior to loading, and

FIG. 2 shows the device in the loaded state.

Referring to FIG. 1 a backing plate 1 is mounted on a vertically upstanding baseboard. 2 which also carries the other parts of the device. The device carries beaters '3 and 4 having operational surfaces parallel to said plate and driven in a linear reciprocating motion while mutually out of phase by motors 5 and 6 (these can equally be driven by a single motor with suitable gearing).

The backing plate 1 carries a rubber surface covering 7 to withstand the vibration from the heaters 3 and 4 and a clamping device 8 is provided so that when the backing plate 1 is pivoted to its closed position (FIG. 2) a plastic bag 8 is clamped between the backing plate and the clamping means 8.

The device was used to blend a. sample for bacteriological analysis. The material to be sampled was put into a fresh bag 8, the bag was placed in position on the backing plate 1 in its open positionas shown in FIG. 1, and the backing plate was pivoted to its closed position (FIG. 2) to clamp the bag in position- Screw clamps (not shown) kept the backing plate in its closed position. The motors 5 and 6 were then started up so as to cause the beaters 3 and 4 to provide a reciprocating movement out of phase against the surface of the bag 8. This caused the contents of the bag to be kneaded and subjected to shearing actions through being forced from one part of the bag to another resulting in intimate mixing which provided a homogenised sample.

It will be apparent that the flexible material used for the bag should have sufficient strength to withstand the kneading action from the heaters 3 and 4 and that the .force supplied by the motors 5 and 6 should not be excessive. The device can satisfactorily operate on most materials that can be mixed in a liquidiser although it will be appreciated that certain hard sharp materials,

e.g., pieces of bone or hard vegetable such as raw carrot may not be entirely suitable for use within this device.

The present device has a number of advantages over conventional liquidising systems; in particular, sample preparation time is very short and the device does not need re-sterilisation for homogenisation of a further sample, as a fresh bag can be used, making the device ideal where rapid throughput is required. Storage space for bags is negligible a thousand bags make a pile less than 15 cms high. Thebags are so cheap that a large store can always be kept ready for use. The bags are very light and can therefore be used in locations where portability is desirable. The sample and bag can be incinerated immediately after use and the bag may be of a transparent material so that the state 'of the sample can be readily ascertained. Temperature rise in the bag is insignificant. Noise level is low. The plastic bag is particularly convenient for use in factories where a sample can be readily transported in the bag from a factory line to the bacteriological testing unit.

What we claim is:

1. A device for blending materials comprising a holder to hold a flexible container containing a mate- 5 rial to be blended, and a motor driven kneading means which is arranged to apply a kneading action to the container walls to homogenize its contents; said holder being arranged to hold a container in the form of an open mouth bag said bag comprising an elongate clamp arranged to transversely clamp across the bag mouth in order to carry the bag and capable of providing a temporary seal to the bag during kneading.

2. A device according to claim 1 in which said holder comprises a backing plate which co-operates with said clamp for clamping the bag, and is arranged to support the bag against the action of said kneading means.

3. A device according to claim 2 in which said plate carries a resilient covering to absorb shocks during kneading.

4. A device according to claim 2 in which said kneading means comprises a pair of beaters arranged to act on different areas of the bag while mutually out of phase, and located with operational surfaces parallel to said plate.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2406403 *May 1, 1943Aug 27, 1946Polaroid CorpPolymerizing apparatus and method
US3141221 *Nov 13, 1962Jul 21, 1964Amtec IncClosure for flexible bags
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4550654 *Dec 27, 1983Nov 5, 1985Heden Team A.G.Apparatus for automatic preparation of food products such as bread, cakes and the like
US4590850 *Jan 4, 1985May 27, 1986Heden Team A.G.Apparatus for automatically making of food products such as bread, cakes and the like
US4711582 *Nov 7, 1986Dec 8, 1987Kennedy Richard BRotary mixing of two component resins in disposable plastic bag
US5769538 *Jun 27, 1996Jun 23, 1998Sherman; MichaelMixer having means for periodically mechanically striking liquid-containing tubes to induce motion of the tubes
US5913603 *May 5, 1997Jun 22, 1999Sealed Air Corporation (U.S.)Mixing device for foam-in-bag packaging system
US6142661 *Apr 1, 1999Nov 7, 2000Labplas Inc.Device for blending the contents of a bag
US6267498 *Mar 6, 2000Jul 31, 2001Labplas Inc.Device for blending the contents of a bag
US6273600 *Jul 3, 1997Aug 14, 2001Filtaflex LimitedMicrobe suspender having a vibrating beater for agitating the contents of a bag
US6312151 *Feb 4, 2000Nov 6, 2001Vac-U-MaxBulk bag pre-conditioner
US6416212 *Mar 7, 2000Jul 9, 2002Christopher Roy RogersMethod and apparatus for mixing materials in a bag with a movable plunger
US6439759 *Aug 31, 1999Aug 27, 2002Seward LimitedDevices for blending materials including a pair of kneading paddles causing the contents of a container to circulate
US6634783 *Aug 9, 2001Oct 21, 2003Vitality Beverages, Inc.Apparatus for agitating a fluid suspension
US6637929 *Sep 27, 2002Oct 28, 2003Vitality Beverages, Inc.Method for agitating a fluid suspension
US6827482 *May 16, 2003Dec 7, 2004Labplas Inc.Spillage collection bag for devices that blend the contents of a sampling bag
US7077559 *Apr 28, 2003Jul 18, 2006Gambro, Inc.Container or bag mixing apparatuses and/or methods
US7377686Apr 7, 2004May 27, 2008Millipore CorporationDisposable mixing system
US7789551 *Mar 7, 2005Sep 7, 2010Stuart John RayDevices for blending materials and bags and for use in such devices
US7799521 *Sep 21, 2010Chen & Chen, LlcThermal cycling
US7891860Feb 22, 2011Millipore CorporationDisposable mixing system
US8070354Dec 6, 2011Bungay Iii Henry RobertSystems and methods for mixing bioprocessing materials
US8177415 *Jul 24, 2007May 15, 2012Tarpaulin.Com, Inc.System for agitating pouched products
US8197117 *Jun 12, 2012Tarpaulin.Com, Inc.Method for agitating pouched products
US8272255May 22, 2007Sep 25, 20123M Innovative Properties CompanySystem and method for preparing samples
US8535936Apr 23, 2009Sep 17, 2013TwistafermVessels for mixing bioprocessing materials
US8563264Nov 19, 2008Oct 22, 20133M Innovative Properties CompanySample preparation for environmental sampling
US8569072Nov 19, 2008Oct 29, 20133M Innovative Properties CompanySample preparation container and method
US8647574Nov 19, 2008Feb 11, 20143M Innovative Properties CompanySample preparation container and method
US8685746Nov 19, 2008Apr 1, 20143M Innovative Properties CompanySample preparation container and method
US8936933May 18, 2010Jan 20, 2015IQumm, Inc.Sample processing methods
US8991239Aug 10, 2012Mar 31, 20153M Innovative Properties CompanySystem and method for preparing samples
US9005551Feb 7, 2011Apr 14, 2015Roche Molecular Systems, Inc.Sample vessels
US9138496Apr 18, 2012Sep 22, 2015AllosourceSystems and methods for cleaning and disinfecting allograft material
US20030049833 *Sep 11, 2002Mar 13, 2003Shuqi ChenSample vessels
US20030214874 *Apr 28, 2003Nov 20, 2003Gambro, Inc.Container or bag mixing apparatuses and/or methods
US20040027916 *May 16, 2003Feb 12, 2004Labplas Inc.Spillage collection bag for devices that blend the contents of a sampling bag
US20050063250 *Apr 7, 2004Mar 24, 2005Hubbard John DanaDisposable mixing system
US20050249033 *May 4, 2004Nov 10, 2005Krause Richard JDisposable reciprocating bag mixing systems
US20060176767 *Apr 19, 2006Aug 10, 2006Gambro, Inc.Container or bag mixing apparatuses and/or methods
US20070140047 *Mar 7, 2005Jun 21, 2007Seward LimitedDevices for blending materials and bags and for use in such devices
US20070269341 *May 22, 2006Nov 22, 20073M Innovative Properties CompanySampling assembly and method of preparing samples
US20080038813 *Apr 26, 2007Feb 14, 2008Shuqi ChenSample vessels
US20080130405 *Jan 30, 2008Jun 5, 2008Millipore CorporationDisposable mixing system
US20080186802 *Feb 5, 2008Aug 7, 2008Bungay Henry RobertSystems and methods for mixing bioprocessing materials
US20090193880 *May 22, 2007Aug 6, 2009Halverson Kurt JSystem and method for preparing samples
US20090325282 *Apr 23, 2009Dec 31, 2009Bungay Iii Henry RobertVessels for mixing bioprocessing materials
US20100218621 *Sep 2, 2010Iquum, Inc.Sample processing methods
US20100248215 *Nov 19, 2008Sep 30, 2010Halverson Kurt JSample preparation container and method
US20100248216 *Nov 19, 2008Sep 30, 20103M Innovative Properties CompanySample preparation container and method
US20100273162 *Oct 15, 2008Oct 28, 2010Sailaja ChandrapatiRapid detection of microorganisms
US20110080800 *Dec 10, 2010Apr 7, 2011Tarpaulin.Com, Inc.System and method for agitating pouched products
US20110143968 *Jun 16, 2011Iquum, Inc.Sample vessels
US20110217767 *Mar 8, 2010Sep 8, 2011Niazi Sarfaraz KSingle-use Stationary Bioreactors and Mixing Vessels
US20120261028 *Sep 24, 2010Oct 18, 2012Sealed Air Corporation (Us)Machine for producing foam within a bag
US20130308418 *Dec 21, 2011Nov 21, 2013Jonathan CutingMixing of the content of a flexible container for biopharmaceutical use
EP1425087A1 *Jun 11, 2002Jun 9, 2004Vitality Beverages, Inc.Apparatus and method for agitating a fluid suspension
EP1512458A1 *Apr 26, 2004Mar 9, 2005Millipore CorporationApparatus and method for the mixing or agitating of components, comprising a flexible deformable container
EP2025391A1Dec 14, 2006Feb 18, 2009Cellexus LimitedCell culture and mixing vessel with gaz circulation
WO1997043039A1 *May 13, 1997Nov 20, 1997Filtaflex LimitedBag beating microbe suspender with vibrating beater
WO1998026861A1 *Dec 18, 1997Jun 25, 1998Tetra Laval Holdings & Finance S.A.A method and an apparatus for vibrating a liquid enclosed in an aseptic bag
WO2003013713A1 *Jun 11, 2002Feb 20, 2003Vitality Beverages, Inc.Apparatus and method for agitating a fluid suspension
WO2008003689A1 *Jul 3, 2007Jan 10, 2008Aes ChemunexDevice for grinding and homogenizing the contents of a bag
Classifications
U.S. Classification366/349, 211/82, 206/221
International ClassificationB01F11/00
Cooperative ClassificationB01F11/0065
European ClassificationB01F11/00J