US2005537A - Apparatus for treating binding materials in the form of powder or grit, to produce dextrine and other adhesives of vegetable origin, as well as for treating other materials - Google Patents

Description

June 18, 1 935.

A. DREYER ETAL APPARATUS FOR TREATING BINDING MATERIALS IN THE FORM OF POWDER OR GRIT TO'PRODUCE DEXTRINE AND OTHER ADHESIVES 0F VEGETABLE ORIGIN AS WELL AS FOR TREATING OTHER MATERIALS Filed Dec. 28, 1932 I ADOLF DREVER WILLY KUTZNEH INVENTORS ATTORNEYS Patented June 18, 1935 APPARATUS FOR TREATING BINDING MA- TERIALS IN THE FORM OF POWDER R GRIT, T0 PRODUCE DEXTRINE AND QTHER ADHESIVES (19F VEGETABLE ORI- GIN, AS WELL AS FOR TREATING OTHER MATEREALS Adolf Dreyer and Willy Kutzner, Potsdam, Germany; said Kutzner assignor to Fred Kutzner, Halensee, near Berlin, Germany Application December 28, 1932, Serial No. 649,228 In Germany January 6,1932

This invention relates to improvements in apparatus for treating binding materials in the Claims.

form of powder or grit to produce dextrine and other adhesive substances made from vegetable '5 or animal products as well as for treating other materials of similar form, or in other words, for preparing dextrine, especially for converting starch to dextrine, and for similar purposes, comprising a container surrounded on all sides by an insulating jacket consisting of walls arranged in a certain distance from the walls of the container.

When producing binding materials like dextrine and other adhesive substances made from vegetable or animal products the components in form of powder or grit are brought into a container, wherein they are mixed by means of suitably arranged paddle works, worm gears or the like. During this process the materials are sprinkled or moistened by a predetermined distinct amount of liquid injected by nozzles or the like. In the known apparatus such as used heretofore it was found, unfortunately, that the operation of the process within the container is deleteriously influenced by the surrounding air especially in view of the pre cipitations of liquid on the inner sides of the container-walls due to variations of temperature, the result of which is a disagreeable pasting and smearing of the materials being treated, and thus the produced binding materials become useless in practice. Also other disadvantages, such as the occurrence of crystallization are caused by the influence of the outside air, and effect a continued damage by loss of material. To avoid these and oth r disadvantages, according to the invention the container is surrounded on all sides by an insulating jacket consisting of walls arranged at a certain distance from the walls of the container and thus creating an airbuffer.

This space so constructed between the contamer-walls and the walls of the jacket is preferably used for arranging the gears necessary for driving the usual mixing means coacting with the bottom of the container, which bottom is preferably trough-shaped.

Another object of the invention is to provide within this jacket suitable cooling and/or heating means. Such cooling and/or heating means may be provided also within the jacket on the bottom and cover parts of the container.

A further object of the invention is to make the cover part of the container adjustable in height, preferably by means of screw shafts and nuts, which latter are supported on the frame parts of the container.

With these and other objects in view the present invention consists in the combination and arrangement of parts, as will be hereinafter more fully described, shown in the accompanying drawing, and particularly pointed out in the appended claims, it being understood that changes in the form, proportion, size and minor details may be made within the scope of the claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawing forming part thereof Figure 1 is a perspective view of an apparatus embodying a practical form of the invention, some parts being broken away.

Figure 2 is a side view, partly in cross section illustrating the mixing means coacting with the trough-shaped bottom.

Figure 3 is a front View of the parts of Figure 2.

Throughout the views, the same reference numerals indicate the same or like parts.

In the practice of our invention, the main portion of the apparatus comprises a container which is formed by the walls at, the metallic bottom 1) and the cover parts 0.

The apparatus can be built up of acid resistant steel or of wood or similar material which must be particularly dry, selected and both free from knots and of straight grain.

Round the container walls an insulating jacket d'is'provided by means of outer walls lc, which are arranged at a predetermined distance from the container walls.

The bottom I), which is preferably troughshaped, is provided with a further insulating jacket 1, which may be either loosely and removably placed adjacent to and below the bottom 1), or made an integral part of said bottom, as shown in Fig. 2, and furthermore the cover part 0 can also be formed by two walls including an insulating jacket m.

The insulating chambers 11 thus constructed can be used for housing the gears n, which are driven by means of a pulley o mounted in suitable bearings. The gears n are mounted on shafts e transversely arranged at some distance above the bottom b and also supported in suitable bearings.

These shafts e rotate about horizontal axes and are provided with the usual paddle works p as illustrated in Figures 2 and 3, which however are not shown in Figure 1.

The insulating chambers d, f and m moreover can be used for arranging therein any cooling and/ or heating means q of known type.

The cover part c together with its insulating jacket m is preferably made adjustable in height. For this purpose the cover is carried by screw spindles 9 running in screw nuts provided with hand wheels h and supported on a part of the frame of the container, e. g. on a transversely mounted beam 1".

The cover is provided in, the usual manner with suitably arranged nozzles l for sprinkling or moistening the charge within the container. When the paddle work is driven at a predetermined rate of rotation the charge is introduced by any suitable and well known devices and is thoroughly mixed, whereby fresh surfaces are continually exposed. to the jets from the nozzles, which project the liquid upon the charge until the highest degree of content is reached, or until all particles are dried, grilled or cooled. The dimensions and the form of the container are so predetermined that the nozzles, when moistening the charge, do not directly encounter the container-walls.

However, when a batch of material has been fully treated, the charge is discharged by suitably arranged openings in the container, and may be removed by means of transporting devices.

Having thus described our invention, what we claim is:

1. Apparatus for treating binding materials in the form of powder or grit to produce dextrine and other adhesives of vegetable origin as well as for treating other materials of similar form and for similar purposes, comprising the combination of a container of substantially rectangular form having a bottom formed into a plurality of successive and parallel troughs, a plurality of mixing means within said container, said means being rotatable about horizontal axes and disposed adjacent said troughs and cooperating therewith, exterior walls individually spaced a certain distance outside all of the walls of the container and together forming an insulating jacket surrounding said container, the insulating space thus formed within the jacket constituting an air buffer.

2. Apparatus according to claim 1 provided with cooling and heating means for treating materials in the container, which cooling and heating means are located in the insulating space Within the jacket as well as the driving gears.

3. Apparatus according to claim 1 provided with a jacket beneath the troughs of the bottom and heating and cooling means disposed in said jacket for heating or cooling material on said bottom in said troughs.

4. Apparatus according to claim 1 provided with a vertically adjustable cover disposed between the main walls of the container.

5. Apparatus according to claim 1 provided with a vertically movable cover disposed between the main walls of the container, supports on said container, and rotatable and vertically disposed screw shafts connected to said cover and 'adjustably held by means engaging the same upon said supports, so that rotation of said shafts will raise or lower said cover in said container.

6. Apparatus according to claim 1 provided with a cover for the container and at least one nozzle in said cover for sprinkling and moistening materials intended to be treated within said container.

7. Apparatus according to claim 1, provided with a vertically adjustable cover disposed between the main walls of the container, and a wall spaced a certain distance above the cover so as to be adjustable therewith and forming an insulating jacket upon said cover.

8. Apparatus according to claim 1 provided with a vertically adjustable cover disposed between the main walls of the container, 2, wall spaced a certain distance above the cover so as to be adjustable therewith and forming an insulating jacket upon said cover, and one or more nozzles in said cover for sprinkling and moistening materials intended to be treated within said container.

9. Apparatus according to claim 1 provided with a vertically adjustable cover disposed between the main walls of the container, a Wall spaced a certain distance above the cover so as to be adjustable therewith and forming an insulating jacket upon said cover, and cooling and heating means disposed in the space formed by said jacket upon said cover for cooling or heating materials in the container below said cover.

10. Apparatus according to claim 1 provided with driving gears for said mixing means located in said insulating space.

WILLY KUTZNER. ADOLF DREYER.

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