Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Food or edible as carrier for pharmaceutical
Reexamination Certificate
1997-03-28
2001-05-29
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Food or edible as carrier for pharmaceutical
C424S489000, C424S463000, C424S442000, C424S048000
Reexamination Certificate
active
06238690
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is related to a seamless capsule comprising a shell material encapsulating a center-filled core material, wherein the shell material is formed of a carbohydrate in glassy state, to methods and apparatus for making the seamless capsule and to food products and topically applied products employing the same.
2. Description of the Prior Art
Traditionally, seamless capsules formed of a shell material encapsulating a core material have been made by using as the shell material film-forming materials such as gelatin and gums. These shell materials present two disadvantages. First, they are formed from an aqueous solution. Consequently, when the capsules are formed, large amounts of water must be removed, requiring great amounts of energy and long drying times. Second, these shell materials dissolve slowly when the capsules are being consumed, thereby leaving a distasteful plastic film-like residue in the mouth.
Seamless capsules are usually made by simultaneously extruding the shell material and the core material through concentrically aligned nozzles such that the extruded shell material and the extruded core material exit the nozzles as a coaxial jet with the shell material surrounding the core material into a stream of cooled carrier fluid that is flowing downward. While descending in the cooled carrier fluid, the coaxial jet breaks into droplets with the shell material encapsulating the core material. The droplets then solidify in the cooled carrier fluid to form seamless capsules. Such methods are disclosed, for example, in U.S. Pat. Nos. 4,251,195 and 4,695,466. However, when the shell material is a material that solidifies quickly, this prior art method is disadvantageous in that the shell material in the coaxial jet may solidify prior to encapsulation As a result, seamless capsules could not be formed, and any capsules that were formed were not spherical and did not have uniform size and shape.
An attempt to overcome this problem was proposed in U.S. Pat. No. 4,422,985, which describes a method that modifies the prior art method by introducing a coaxial triple jet consisting of a heated circulating liquid surrounding the shell material which in turn surrounds the core material into the cooled carrier liquid to allow encapsulation to take place. In this method, since capsule formation must still take place in the cooled carrier liquid, if any solidification of the shell material occurs prior to entering the cooled carrier liquid, encapsulation will not occur.
Other methods used for making capsules typically involve using a screw extruder to extrude an emulsion containing the shell matrix and the material to be encapsulated. However, in such a process, it is difficult to make a capsule formed of a shell material encapsulating a center-filled core material. Instead, the encapsulated material is often in the form of globules that are distributed within the matrix.
U.S. Pat. No. 2,857,281 describes a process for making a solid flavoring composition in the form of globular particles by extruding an emulsion containing a sugar base and flavor oil into droplets.
U.S. Pat No. 3,971,852 describes a process for encapsulating oil in a cellular matrix that is formed of polyhydroxy and polysaccharide compounds. The oil is in an emulsified state with the cellular matrix, and the resulting emulsion is spray dried as droplets of the emulsion.
U.S. Pat. No. 5,009,900 discloses a process for encapsulating volatile and/or labile components with extruded glassy matrices, wherein the encapsulated material is distributed in the glassy matrices.
European Patent Application No. 0339958 discloses an antifoaming composition containing an outer shell of a meltable sugar in its crystalline state with an organo-polysiloxane antifoaming composition imbedded therein. This composition is formed by melting a sugar base and dispersing the organopolysiloxane antifoaming composition in the sugar melt as the discontinuous phase. The melt is then solidified, thereby imbedding and entrapping the antifoaming composition, which is dispersed in the melt.
U.S. Pat. No. 5,300,305 relates to microcapsule that provide long lasting breath protection.
An effective means of forming seamless capsules comprising a shell material encapsulating a core material in accordance with the present invention enable the production of a wide variety of products for consumption or application to the human body.
SUMMARY OF THE INVENTION
The present invention is generally directed to end use products for consumption and application to the human body in the form of or including seamless capsules comprising a shell material made of a glassy carbohydrate encapsulating a core material which are produced by a method comprising the steps of:
providing a concentrically aligned multiple nozzle system having at least an outer nozzle and an inner nozzle;
supplying a shell material to the outer nozzle and a core material to the inner nozzle;
simultaneously extruding the shell material through the outer nozzle and the core material through the inner nozzle, thereby forming a coaxial jet of the shell material surrounding the core material;
introducing the coaxial jet into a flow of a heated carrier fluid, thereby allowing the shell material to encapsulate the core material to form capsules in the heated carrier fluid; and
introducing the capsules into a flow of a cooled carrier fluid, thereby allowing the capsules to solidify.
The seamless capsules can be used, for example, in the production of food products, beverages, topical compositions and the like.
REFERENCES:
patent: 2857281 (1958-10-01), Schultz et al.
patent: 3971852 (1976-07-01), Brenner et al.
patent: 4251195 (1981-02-01), Suzuki et al.
patent: 4279632 (1981-07-01), Frosch et al.
patent: 4422985 (1983-12-01), Morishita et al.
patent: 4695466 (1987-09-01), Morishita et al.
patent: 4888140 (1989-12-01), Schlameus et al.
patent: 5009900 (1991-04-01), Levine et al.
patent: 5095054 (1992-03-01), Lay et al.
patent: 5300305 (1994-04-01), Stapler et al.
patent: 5370864 (1994-12-01), Peterson et al.
patent: 5620707 (1997-04-01), Sanker et al.
patent: 563807 (1975-07-01), None
patent: 675370 (1990-09-01), None
patent: 0339958 (1989-11-01), None
patent: 0513563 (1992-11-01), None
patent: 0525731 (1993-02-01), None
Glenn Blake Henderson
Kiefer Jesse John
Bennett Rachel M.
Page Thurman K.
Vag Linda A.
Warner-Lambert & Company
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