referring to fig1 the present invention provides a method for an extraction and isolation of tanic and gallic acid from the bark 10 of oak and pine trees respectively . the oak bark 12 and pine tree bark 14 is carefully screened in order to prevent any contaminated sources in the present invention . the screening process is designed to remove stones , rocks and other extraneous matter . the bark 10 of the instant invention may be fresh , wet or dry , and may be comprised of inner or outer bark 10 from oak and pine trees . after the above screening process is finalized , the bark 10 is selected and is thoroughly washed at room temperature . the bark is then added to previously boiled water in a reaction vessel . the preferred extraction during this process for the present invention may occur with or without agitation . preferably , the process provides for stirring the preferred extraction in order to recover the end product at a faster rate . the preferred embodiment extraction process in step 1 provides for a resultant stream of one pound of bark 10 which is added to previously to three gallons of boiled water 18 from 75 - 95 degrees celsius . thus the preferred extraction process is a batch operation either with or without agitation . therefore , the oak bark 12 is heated in a batch operation in vessel one 20 while in step two , the pine bark 14 is heated in vessel two 22 . hence , step two provides for a resultant stream of one pound of pine bark 14 which is added to three gallons of boiled water 24 from 75 - 95 degrees celsius . the oak bark 12 and pine bark 14 are then boiled for twenty minutes to six hours . in the preferred embodiment , it has been found that two hours of boiling at atmospheric pressure is optimal . the present invention provides alternatively for a series of continuous stirred reactors , or a plug flow continuous reactor may be used to accomplish the hot water extraction . thus , a major advantage of the batch process is the variability of time intervals desired between stages once the bark solids are removed from the hot water 24 . in several embodiments of the present invention where continuous extraction in a series of one or more stirred reactors or plug flow continuous reactors occurs it has been found that the extraction time can be reduced to the ten minute range or the like . in step three , the present invention provides for the oak bark extract to be removed from the boiling water vessels by vacuum filtration as many times as desired including in practice normally twice . in step four , the present invention provides for the removal of the pine bark 14 from the boiling water vessel by vacuum filtration 38 as many times as desired including in practice normally twice . in step five , the present invention provides for the combination of the component liquids 26 of pine bark extract 28 and oak bark extract 30 into a vessel 32 at room temperature . this vessel 32 of the present invention now provides component liquids 26 comprised of 2 % active ingredients of gallic acids 34 and tannic acids 36 . these active gallic 34 and tannic 36 compounds are then added in step six to other inactive ingredients which include corn syrup and flavor . in other embodiments of the present invention , the percentage of active ingredients of gallic acids 34 and tannic acids 36 may provide yields between 0 . 5 to 10 % by weight of proanthocyanidins based on dried bark weight . while the invention has been particularly shown and described with reference to an embodiment thereof , it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the spirit and scope of the invention .
a bioflavanoid rich potent extract and process for the extraction from oak bark and pine bark that is highly enriched in proanthocyainds . the present invention provides for component liquids comprised of approximately 2 % active ingredients of gallic acids and tannic acids which are then added to other inactive ingredients which include corn syrup and flavoring .