This section is from the book "A Treatise On Beverages or The Complete Practical Bottler", by Charles Herman Sulz. Also available from Amazon: A Treatise On Beverages.
These are the necessary conjunctions of the bottling machine with syruping arrangement. They contain the ready-made and previously flavored syrup which feeds the syrup gauge or syrup pump, and is intended for flavoring carbonated water. It is necessary or at least advisable, where different beverages by a continuous bottling process are being produced, to have for each kind of flavored syrup a separate syrup can or tank, which can be quickly and without delay connected with the syrup gauge and bottling machine. In Fig. 245 a syrup tank as frequently used is represented. They are generally of copper and tin-lined, or entirely of tin with register, rubber hose and tap.
This tank is made of heavy copper, well lined with block-tin; and the top edge is turned over outward, forming a tubular bead, which serves to hold in place the cord with which the wet cotton cloth for supporting the filter paper is retained. The cock is placed so low that every drop of syrup may be drawn off. Strong handles are provided for moving it, and a substantial cover serves to keep out dust.
Fig. 245. - Syrup Can.
It is highly important to avoid any exposure of flavored syrups to copper, lead or zinc, as its chemical action on such metals results in a contamination which not only destroys its beneficial effects, but renders it positively noxious. Ordinary tin vessels should be banished from the bottling establishment. Galvanized iron tanks are unfit for syrup receptacles, as the syrup would be contaminated by the zinc, which is the coating of such tanks. To secure perfect purity it is necessary to use syrup tanks lined with good block or sheet tin, thus making any contact of the syrup with injurious metal absolutely impossible.
Porcelain-lined syrup tanks or slate tanks or glass vessels are the best, as even tin will be gradually attacked by the syrup and the citric and tartaric acids it contains. These slate tanks are supplied with three or four divisions or compartments. They are practically covered with glass plates to keep the dust off. They may also be used as mixing-tanks for mineral-water solutions. The contents are drawn from the cock at the bottom. No metal faucets should be attached to syrup receptacles; faucets of glass or porcelain are the best.
Glazed earthenware vessels should not be used, since it is known that into their finish chemical compounds, lead, etc., enter, which injuriously affect the syrups and even destroy their flavors.
To detect lead in glazed or tinned enameled vessels, and to make sure of their unfitness as a syrup tank, proceed as follows: Carefully clean them from grease, if necessary by application of caustic soda lye. Then apply a drop of nitric acid or king water, and heat; after cooling apply a drop of a 5 per cent, solution of iodide of potassium (5 parts dissolved in 95 parts of distilled water). A yellow stain is visible when lead is present.
Fig. 246. - Slate Syrup Tank.
In large establishments quite extensive arrangements in syrup tanks are necessary, and they are better stationary, connected with the syrup making and filtering apparatus and by means of tubing directly connected with the bottling machine, as illustrated under "Syrup Making," later on.
This useful article (Fig. 247) is a great saving of labor and waste. The row of unions A are connected to the different kinds of syrup by means of tin pipes being attached. The pipe B goes to syrup union on filling machine. By turning any of the taps C any kind of syrup is supplied without any trouble. These junctions should be placed in reach of the bottler, on a suitable board or wall. They are made of pure block tin and gun-metal, thickly tinned inside and out, and can be supplied with any number of branches.
Fig. 247. - Syrup Junction.
Fig. 248. - Syrup Connector.
The connector (Fig. 248) is for the purpose of enabling three to six or more syrups to be put into the one filling machine; or, by turning it over so that the single pipe is at the top, one syrup can be drawn for supplying six or more machines, as may be required.