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Patented Feb. v 8, 1938 2,107,559 UNITED STATES PATENT OFFICE 2,107,559 CARBONATED BEVERAGE Clarence Edward Beck, Philadelphia, Pa" as slgnor of forty-seven percent to Albert '1‘. I-lanby, eight percent to Blanche Beck, and five percent to James H. Tait, all of Phila delphia, Pa. No Drawilm. Application November 14, 1935, Serial No. 49,858 7 Claims. (Cl. 99-78) My invention relates to carbonated beverages use a single tablet for the carbonation of liquids. Therefore, one object of my invention is to and more particularly to a means of carbonating liquids by the use of a mixture of a carbonate and/or bicarbonate with an acid, said mixture being compressed into a single tablet as herein after described. provide a means whereby carbonic acid and car bon dioxide can. be produced in a beverage by dissolving a single tablet therein. A further ob ject is the production of a carbonating tablet containing the above ingredients, said tablet For many years one of the means of carbonat ing beverages has consisted in adding powders being stable when dry and yielding carbonic acid of various compositions to the liquid to be car and carbon dioxide when in contact with water. A further object is the production of a carbonat 10 ing means which is controlled as to its reaction 10 bonated. This method has a very serious vdis advantage in that the evolution of the gas at or near the surface of the liquid is so rapid that much of the gas escapes before it has had time to carbonate the liquid. time. - In carrying out my invention I use alkali or Another disadvantage alkaline earth, carbonates or bicarbonates, either of such powders is that even such gas as does not escape at once is evolved in the upper portion alone or mixed. I prefer to use sodium bicar 15 bonate because of its cheapness and uniform action. As an acid I use organic alpha-hydroxy acids innocuous to health such as malic acid, ‘ of the liquid body and as a‘ result mechanical means must be resorted to in order to achieve carbonation in the lower levels. As a result, - citric acid or tartaric acid, either alone or inad beverages so carbonated have a tendency to be mixture. However, in place of. these organic flat and to lose what little life they do have in a acids or in addition thereto I may use inorganic relatively short time. I have discovered that hydrogen ion producing substances such as the ' these disadvantages may be obviated by produc alkali bisulphates. I prefer to use sodium or ing the carbon dioxide in the lower levels of the potassium bisulphate. The acid phosphates such liquid. Carbon dioxide, being a gas, rises as soon as it is evolved and in so doing it is for the most as monosodium phosphate may also be used. As a sweetening ‘agent I use saccharine. As ?avoring'ingredients I use the usual dry extracts or oils and for coloring I use the vegetable colors which are suitable for human consumption. part used up in the formation of carbonic acid by combining with the water on the way to the surface. In order to produce carbon dioxide in 30 the lower levels I use a tablet which is heavier than an equal volume of water. This tablet is so constructed that it stays at the bottom of the liquid during all stages of its decomposition but , The following is a description of one method of 30 preparing my carbonating tablets. I use the fol lowing ingredients in the amounts stated: of course I may vary the level at which it de Sodium bicarbonate _____________ __gram__ 1 composes by mechanical means. Tartaric acid ____________________ __do..‘___ 1 - Another di?iculty in the use of these carbonat ing powders is the problem of controlling the speed with which they react. If. the reaction goes too rapidly ortoo slowly the resultant car 40 bonation is unsatisfactory; thus the control of the reaction time is of prime importance. I have also discovered that when a tablet is used, the rate of evolution of carbon dioxide is a. factor of great importance in the ultimate car 45 bonation. If this evolution is too rapid, one of the disadvantages inherent in the old use of powders is present; that is to say, in the too rapid evolution there is too great an escape of carbon dioxide. On the other hand, if the evolu 50 tion of gas is too slow, the result is unsatisfac tory because the beverage has had time to lose some of its life in the time during which the tablet is decomposing. I have discovered a , Saccharine Flavor‘ do ~ _ 0.05 cc__ 0.02 Color ____ _-' _________________________ __ q. 5. ad. The sodium bicarbonate and the saccharine are ground together in a mortar to which the ?avor ing and coloring are then added. The tartaric acid is thoroughly ground in a separate mortar. The material in these two mortars is then trans ferred to the die of a press. I have discovered that the reaction time referred to above can be controlled by varying the manner in which the materials are‘ put into- the die. For a tablet of very long reaction time, the substances are thor oughly mixed prior to placing them in the die. In order to get a tablet having a reaction time 56 of sixty seconds or less, I have found that it is necessary to introduce the bicarbonate and the acid alternately into the die in small amounts. method hereinafter described of controlling this The amount of each alternate addition to the 55 reaction time andxI have thus made it feasible to die has a de?nite e?ect on the reaction time of 2 the completed tablet. 2,107,559 I have found that the best results are obtained when the bicarbonate and acid are put into the die in about a total of sixteen portions. This corresponds to an addi tion of one eighth of a gram of bicarbonate fol lowed by one eighth of a gram of acid, and so on until all of the material has been introduced into the die. However, I may vary these amounts for either or both substances. Pressure is then applied in an amount su?icient to give a ?rm tablet. In addition to accomplishing better carbona tion than the powders heretofore used, my tablet has certain practical advantages. Due to its size 15 and form, my tablet is much easier to handle and transport and it will be easier to market than a bulky powder. It is also very much easier to use. The tablet is simply dropped into the liquid to be carbonated and no further attention need 20 be given it. At the end of the predetermined carbonation period the beverage is carbonated and ready for consumption. Having thus‘ described my invention, I claim: 1. A carbonating tablet the essential ingre (0 Cl dients of which are an alkali carbonate and an acid juxtaposed in alternate layers, the carbonate and the acid being intimately associated at the juncture of the layers and not elsewhere and the alternate layers being exposed at their edges. 30 2. A carbonating tablet the essential ingre dients of which are an alkali bicarbonate and an acid juxtaposed in alternate layers, the bicar bonate and the acid being intimately associated at the juncture of the layers and not elsewhere and the alternate layers being exposed at their edges. 3. A carbonating tablet the essential ingre dients of which are an alkali carbonate and an organic alpha hydroxy acid juxtaposed in alter nate layers, the carbonate and the acid being intimately associated at the juncture of the layers and not elsewhere and the alternate layers being exposed at their edges. 4. A carbonating tablet the essential ingre dients of which are an alkali carbonate and tartaric acid juxtaposed in alternate layers, the 10 carbonate and the acid being intimately asso ciated at the juncture of the layers and not else where and the alternate layers being exposed at their edges. 5. A carbonating tablet the essential ingre dients of which are an ‘alkali bicarbonate and an organic alpha hydroxy: acid juxtaposed in alter nate layers, the bicarbonate and the acid being intimately associated at the juncture of the layers and not elsewhere and the alternate layers being 20 exposed at their edges. 6. A carbonating tablet the essential ingre dients of which are an alkali bicarbonate and tartaric acid juxtaposed in alternate layers, the bicarbonate and the acid being intimately asso 25 ciated at the juncture of the layers and not else where and the alternate layers being exposed at their edges. 7. A carbonating tablet the essential ingre dients of which are sodium bicarbonate and tar 30 taric acid juxtaposed in alternate layers, the bicarbonate and the acid being intimately asso ciated at the juncture of the layers and not else where and the alternate layers being exposed at 35 their edges. CLARENCE EDWARD BECK.