US902812A - Process of pasteurization. - Google Patents

Description

Patented Nov. 3, 1908.

Illlnlllllllllvlll A. GOETZ da P. A. JONES.

PBOUBSS 0F PABTEUBIZTION.

ArrLloA'rIox FILED 23.13, moa. nmmwnn nu. av. 100s.

UNITED STATES PATENT OFFICE.

ADOLPH GOETZ AND PALMER A. JONES, OF GRAND RAPIDS, MICHIGAN.

PROCESS 0l' PABTEUBIZATIUN.

Patented Nov. 8, 1908.

Application led April 1B, 1906, Serial No. 811,578. Renewed March 27, 1908. Serial No. 23,589.

To all 'whom it may concern.:

Be it known that we, ADoLPH Gon'rz and PALMER A. Jonas, citizens of the United States, residing at Grand Rapids, in the county of Kent and State of Michi an, have invented certain new and useful mprovements in Processes of Pasteurization; and we do hereby declare the following to be a full, clear, and exact description of the invention,\such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to improvements in processes of pasteurization; and more particularly to a rocess for asteurizing beer, wine, milk and) other like uids; and its object is to provide a process whereby the heat mg of the fluid to be pasteurized will be sub stantially instantaneous, and without unduly heating any portion of the same; to provide a process that will destroy the germs in the fluid Without any material change of con dition in respect to flavor, or other characteristics of the fluid.

Heretofore in pasteurizing processes, the fluid has been heated either in bulk within heated containing vessels or caused to flow in a current between walls to which heat is applied. When heated in bulk in a contain-- ing vessel, it is necessary to apply the heat to the vessel a long time in order that the heat may enetrate sufficiently through the mass of fluid to 'each all )arts of the same. The result is a change o flavor of the fluid, due to long exposure to heat and also overheating that portion of the fluid adjacent to the walls of the containing vessel, and in some cases coagulation of substances that should remain fluid, thus producing undesirable results, or imperfect pasteur1zation. In case the fluidV is caused to flow between heated walls, the same difficulties arise by virtue of `the adhesion of the fluid to the walls and the slower movement adjacent thereto. The more remote the fluid from the Walls, the more rapidly it will move and the less heat it will receive, in'conse uence of which too much heat must be app ied to a portion of the fluid in order to reach this more rapidly moving and more remote part of the current. This difference in temperature between the art of the current close to the hot Wall and tige more rapidly moving inner part of the stream, frequently results in the esca e of a part of the latter without being s ciently heated to effect pasteuriaation, while at theV same time the other portions are overheated and injured thereby. We have found that to avoid these undesirable results, the heat should be applied as short a time as possible, and uniformly to all parts, and to each minute portion of the fluid. We have found that the destruction of the vitality of vegetative microorganisms, or of bacteria, is practically instantaneous when the proper temperature is reached, and that long continued heating is not necessary, if each and everyone of the same can be heated alike.

Our invention consists in treating the fluid to be pasteurized in a novel manner, to-Wit: minutely subdividing a flowing stream 'or of the stream outward at frequent intervals 'and equalizing the flow throughout all parts of the same, by extending therethrough dividing, retarding, and deflecting means, and applying said means, substantially as hereinafter de scribed, whereby each-and every part of the fluid moves with substantially uniform speed and is so divided and deflected that each and every minute subdivision is brought into intimate contact with heat transmitting material, and heated substantially instantaneously, as will more fully appear'by reference to the accompanying drawlngs, which illustrate a mechanism adapted to perform Aour improved process, in which Figure 1 shows a portion of an ap aratus, in vertical section, capable of per orming our improved process, and Fig. Q a side elevation ofthe same With the seven walls and deflectin material broken away step by ste to 1llustrate their respective position an relation. That portion of the device in which the fluid to be pasteurized is heated consists of a series of any convenient number of conduits or cells, formed by a series of retaining, walls 1, spaced apart and arranged substantially parallel and rovided w1th any convenient mar inal 'c osures, and with means for circu ating the respective fluids through the alternate cells. Interposed between the plates and in the alternate cells 4 through which the fluid to be asteurized flows, is a fluid deflecting mater1al 2 having circuitous passages therethrough preferably a woven wirer fabric made of heat conducting material, whereby the fluid passing through the cell is minutely subdivided and the interior flow of the same heat to the retaining walls and ,the

is retarded and defiected at frequent intervals. Said material will also absorb heat from the walls and distribute the same throughout the current of iiuid owin through the cell. To heat these Walls an the material therebetween, each alternate cell 3 is supplied with a suitable heating Huid, such as hot water, the other alternate cells 4 being supplied with the fluid to be pasteurized, the result being that the heat from the heating fluid is transmitted to the walls and material therebetween, and from these to the fluid to be pasteurized, which Huid, being so minutely subdivided is repeatedly deflected against the Walls, and the flow thereof .rendered uniform throughout, and is heated uniformly and practica ly instantaneously, every minute subdivision receiving an equal amount of heat in the same short s ace of time. By this process We are thus ab e to thoroughly pasteurize a Huid by subjecting it to heat for but the fraction of a second of time, and without any of the objectionable results of overheating, or long continued treatment.

What we claim is:

1. The method of pasteurizin consist-infr of assing a current o the same between heat'e Walls, and deflecting the interior `poi-tion of the current toward said walls at frequent intervals, to simultane a fluid,`

between heated walls, retarding the iow of the interior portion of the current, dividing the current at frequent intervals, and deflecting the divided portions of the current toward the heated Walls.

4. The method of pasteurizin a Huid consisting of passinor a current ov the fluid between heated walls, interposing between the walls and in said current defiecting, dividing, retarding and heat conducting material, and applying heat to said walls and material, whereby the Huid is quickly and uniformly heated throughout.

In testimony whereof We afiix our signatures in presence of two Witnesses.

ADoLPH GoETz. PALMER A. JONES.

Witnesses:

LUTHER V. MoUL'roN, f GEonGIANA CHACE.

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