Title:
Garlic separator
United States Patent 2283449


Abstract:
This invention relates to improvements in the method and milling plant described and illustrated in our co-pending application No. 266,754 which was issued as Patent 2,255,226 on September 9, 1941, of which the present application may be regarded as being a continuation in certain respects,...



Inventors:
Charles, Meneux
Gabriel, Bourdin Sylvain
Louis, Chausse
Application Number:
US32656840A
Publication Date:
05/19/1942
Filing Date:
03/29/1940
Assignee:
Charles, Meneux
Gabriel, Bourdin Sylvain
Louis, Chausse
Primary Class:
Other Classes:
209/44.1, 209/139.1, 209/149, 209/700, 241/9
International Classes:
B07B11/02
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Description:

This invention relates to improvements in the method and milling plant described and illustrated in our co-pending application No. 266,754 which was issued as Patent 2,255,226 on September 9, 1941, of which the present application may be regarded as being a continuation in certain respects, an object of such improvements being to separate from the coarse meal resulting from a preliminary hulling or decorticating and grinding of the corn (cereal grains of any description) containing garlic (or similar impurities) the lighter constituents such for example as bran portions before the meal reaches the actual garlic-removing stage of the milling process.

Another object of the present improvements is to eliminate said lighter constituents automatically and to make it possible to regulate at will according to practical requirements the speed or the extent of such elimination.

Still another object of the present improvements is to conduct such elimination of the lighter constituents of the coarse meal during the progress of the milling treatment without substantially lengthening the duration of such treatment and without requiring much extra power. With these and such other objects and features in view as will incidentally appear hereafter, the invention comprises the novel combination of steps and the novel construction and arrangement of parts or elements that will now :; be described with reference to the accompanying diagrammatic drawing exemplifying a suitable embodiment of the same and forming a part of the present disclosure.

In the drawing: Figure 1 is a diagrammatic view showing the succession of elements comprised in the apparatus or plant for carrying out the process according to the invention.

Figure 2 is an elevational view of one of a pair . of cooperating garlic-removing cylindrical rollers showing, partly, the grooves and flutes on its peripheral surface.

Figure 3 is a sectional view on a much larger scale showing a few of the spaced grooves on * the roller illustrated in Fig. 2, the section being taken on line 3-3 of Figure 2.

Figure 4 is a sectional view drawn to the same scale as Fig. 3 and showing a few of the contiguous flutes on the said roller, the section be- 5 ing taken along the line 4-4 of Figure 2.

As illustrated by the diagram of Fig. 1, the mass of cereal grains (for example wheat or corn grains) mixed with a certain proportion (varying with crops) of garlic is subjected to a pre- 5 liminary hulling or decorticating and grinding operation in a conventional grinder of known construction which is shown diagrammatically by A and comprises as essential parts cooperating cylinders a', a2 (partly shown). The coarse meal is then fed into a tube I provided with an airtight rotary bladed valve or gate 2 adapted to rotate for example in the direction depicted by the arrow a and connected to the upper part of a ported hopper 3 provided with a door 3a and with a slanting baffle 4. The hopper 3 contains a plate or chute 5 sharply inclined in a direction reverse to that of the baffle 4 and terminating at its lower end at some little distance from the bottom of said hopper. Upon this plate 5 the meal fed by the tube I and deflected by the baffle 4 is spread in layer form as it flows down in the hopper by gravity. The spreading action is facilitated by the provision of spaced projections or baffles 5a sloping off the front surface of the plate 5. These baffles 5a may be advantageously of triangular outline. The back surface of the plate 5 is stepped as shown and provided with an adjustable damper 6.

Between the back surface of the plate 5 and the adjacent wall of the hopper 3 is defined an upwardly directed air duct or chimney 7 opening at its upper end into an expansion chamber 7a connected to conventional means 7b for creating an air draft through said chimney. The lighter constituents of the coarse meal which have been sucked up by the ascending air current thus created in the air duct 7 collect in the chamber 7a and they can be removed therefrom ; in any approved way. The upper portion of the hopper 3 is cylindrical while its lower portion is frustum shaped. The lower end of the hopper 3 is connected to a downtake tube 8 provided at its bottom extremity with air intakes 9 the cross o section of which can be adjusted at will by slidable dampers 10, whereby the intensity of the draft can be regulated.

Owing to this arrangement, an ascending air current or draft of regulatable intensity can be created through the downtake tube 8 and uptake duct 6 along the path shown by the arrows. This draft is of sufficient intensity to lift and separate most of the lighter constituents (for example bran) of the meal which flows down the tube 8 0 while allowing the heavier constituents (mostly coarse flour and garlic or similar impurities) to continue their downward travel.

At its egress from the lower outlet of the tube 8, the meal, freed as above stated of most of its 5 lighter constituents, follows the downward path depicted by the arrow I and reaches an underlying roll 12 which cooperates with a slightly spaced companion roll 13 rotating in the same direction to form a distributor mounted over a trough 14 adjacent the frame wall 15. The purpose of such distributor is to form the mass of grains mixed with garlic into sheet or layer form and to feed such sheet by gravity (as shown by the line 16) between the rigid cylindrical rollers 17, 18 which rotate in opposite directions under the action of any suitable drive (not shown) preferably at slightly different angular speeds.

The rollers 17, 18 are in substantially tangentialrelation.

The purpose of the cooperating rollers 17, 18. is to remove or pick up the garlic seeds scattered amidst the meal of cereal grains-from said meal as the latter passes through said rollers. This result is obtained in the embodiment illustrated by providing the roller 18 with grooves 19 and flutes 20 shaped, arranged and extending as shown by Figs. 2, 3 and 4. The grooves 19-extend at right angles to the generatrix x-x of the roller 18; they are separated by plain surfaces 21. The flutes 20 run at a slight obliquity to said- generatrix x-x and are arranged in contiguous relationship. The grooves 19 and flutes 20 intersect one another to form angles having about 75° to 105°. Such angularities are not limitative. 3 The peripheral surface of the grooved and fluted roller 18 is rubbed by a revoluble brush 22 mounted on an axis extending parallel to the axis of the roller 18. The brush 22 is actuated by frictional contact with the roller 18 and its 3 rotary motion is slackened by the braking effect exerted by a stationary brush 23 arranged sidewise, so that the peripheral speed of the brush 22 is considerably smaller than that of the roller 18. Assuming for example the roller 18 to ro- 4 tate at a speed of 350 R. P. M., the brush 22 may turn at a speed of 60 to 80 R. P. M. to properly exercise its action.

The brush 22 may have any suitable shape and size and it may be arranged to rub either the 4 roller 18 or the roller 17. Its bristles are constituted advantageously by goose feathers and/or piassaba fibres. The purpose of the brush 22 is to strip off or eject the garlic seeds from the grooves 19 and flutes 20 by which they are picked up on the roller 18. Such result is obtained with more certainty owing to the fact that the preliminary decorticating action to which the grain mixture is subjected hulls the garlic seeds and uncovers their pulp which is somewhat tacky, 5 whereby they can be seized more easily by the bristles of the brush 22.

The function of the stationary brush 23 is both to slacken the speed of the brush 22 and to strip or doff its bristles. 60 The garlic seeds that are ejected from the roller 18 by the action of the brush 22 fall as shown by the line 24 while carrying with them a small proportion of bran and meal. Simultaneously, the cereal grains freed from the garlic seeds leave 65 the cooperating rollers 17 and 18 and fall by gravity along the path depicted by the line 25.

The paths 24 and 25 followed by the respective substances are separated by a partition 26 to be prevented from intermingling back.

The path 24 leads at 27 to the hopper 28 of a separating device 29 the purpose of which is to sort the garlic seeds from the remaining, bran and meal carried thereby. Such separating de- 75 vice may be of any known type and may comprise for example a plane sieve as used for separating groats from semolina or other meal components, and a fan adapted to remove the several portions of bran. The garlic seeds are discharged at 30 while the bran is collected at 31 and the meal is collected at 32.

The path 25 leads to a grinding device which may be made up of a pair of tangential cylinders 33, 34 capable of further grinding the meal to the state of a finer flour. One or more pairs of such grinding cylinders may be provided to operate either in series or in parallel. The flour leaving, the grinding device follows the path depicted by the line 35 and meets the substances which come from the separating device 29 as shown at 36. The mixed substances then reach at 37 the- bolting stage (not shown) which may take place in any known way.

As will be seen, the garlic seeds are removed from the cereal grains during the course of the milling operations that is to say intermediate several grinding stages after most of the lighter constituents of the meal have been blown off, so that the present method and apparatus can be suitably incorporated with a milling plant.

The constructional details of the apparatus might vary without departing from the scope of the subjoined claims.

0 What is claimed is: 1. The hereinbefore described method of milling and separating garlic from corn comprising the steps of preliminarily grinding said corn to obtain a coarse meal, spreading said meal into '5 a layer, causing an air draft to impinge said layer in counter-current so as to blow away the lighter constituents of the corn, leading the meal between revoluble rigid members one at least of which has a garlic-picking surface and is doffed 0 by friction means, separately collecting the garlic and the clean meal, and subjecting the clean meal to further grinding.

2. In a milling plant comprising means for preliminarily grinding corn containing garlic to a 5 coarse meal, means receiving the coarse meal from said first means and including an. enclosure for spreading said meal into a layer, means for causing an air draft to impinge said layer in counter-current, a pair of revoluble rigid 0members between which the meal is fed from said enclosure, one at least of said members having a garlic-picking surface, friction means doffing said surface, means for separately collecting the garlic off the friction means and the clean meal Soff the outlet side of said revoluble members, and grinding means for bringing said clean meal to a state of greater fineness.

3. In a milling plant comprising grinding means for preliminarily converting corn containing garlic to a coarse meal, means receiving the coarse meal from said first means and including an enclosure connected thereto for spreading said meal into a layer, means associated with said enclosure for causing an air draft to impinge said layer in counter-current, a pair of revoluble rigid members located under the enclosure so as to receive between them the layer of meal fed by gravity from said enclosure, one at least of said members having a garlic-picking surface, friction means doffing said surface, means for separately collecting the garlic off the friction means and the clean meal off the outlet side of said. revoluble members, and further grinding means located for receiving said clean meal and bringing it to a state of greater fineness.

4. In a milling plant comprising means for hulling and grinding a mass of cereal grains mixed with garlic to obtain a coarse meal, an air-tight gate receiving said meal and communieating with one end of an enclosure, means in said enclosure for spreading said meal into layer form while it flows through it, tubular means connected to the other end of the enclosure, said spreading means defining in conjunction with the wall of the enclosure an air duct, means for creating an air draft through said tubular means and air duct, a pair of cooperating rigid rollers so located as to receive between them said coarse meal as it comes out of said tubular means, one at least of said surfaces having intersecting grooves of such a size as to pick up the garlic, movable friction means in contact with the grooved roller, stationary friction means doffing the first-named friction means, and means for separately collecting the garlic ejected off the friction means and the clean meal devoid of garlic from the outlet side of said rollers.

5. In a milling plant comprising primary grinding means for converting a mass of corn mixed with garlic into a coarse meal, an air-tight gate connected to said grinding means and communicating with the top of an enclosure, means in said enclosure for spreading said meal into layer form while it falls through it by gravity, tubular means connected to the bottom of the enclosure, said spreading means defining in conjunction with the wall of the enclosure an air duct for the escape of the lighter constituents of the coarse meal, means for creating an ascending air draft through said tubular means and duct, a pair of cooperating rigid rollers so located as to receive between them said coarse meal as it falls out of said tubular means, one at least of said rollers having intersecting grooves and flutes to pick up the garlic, movable friction means in contact with one of said rollers, stationary friction means doffing the first-named friction means, means for collecting the garlic ejected off the friction means separately from the clean meal flowing from the outlet side of said rollers, and secondary grinding means located to receive said clean meal and to convert it into finer meal.

6. In a milling plant comprising grinding means for preliminarily converting corn containing garlic into a coarse meal, an air-tight gate connected with said grinding means, an enclosure having its inlet connected to said gate, a baffled plate slanting from a position underlying the enclosure inlet for spreading the meal into a layer in said enclosure, tubular means having air intakes and communicating with the outlet of said enclosure, an air draft duct defined by said plate and by the wall of the enclosure, means for creating said draft, means for regulating the intensity of said air draft, a pair of revoluble rigid rollers receiving the meal coming out of said tubular means, one at least of said rollers having a garlic-picking surface, friction means doffing said surface, means for separately collecting the garlic off the friction means and the clean meal off the outlet side of said rollers, and further grinding means located to receive said clean meal and to convert it to greater fineness.

7. In a milling plant comprising grinding means for preliminarily converting corn containing garlic into a coarse meal and delivering said meal through an outlet, an air-tight rotary bladed valve connected with said outlet, a hopper having its inlet connected to said gate, a baffled plate sharply slanting in said hopper from a position adjacent its inlet for spreading the meal into a layer therein, tubular means having air intakes and communicating with the outlet of said hopper, a duct defined in said hopper between said plate and the wall of the hopper, means for creating an air draft through said tubular means and duct, means for regulating the intensity of the air draft, a pair of revoluble rigid rollers the inlet crotch of which receives the meal flowing down from said tubular means, one at least of said rollers having a garlic-picking knurled surface, friction means doffing said surface, means including an upstanding partition extending downwards from the vicinity of the frictional rollers for separately collecting the garlic off the friction means and the clean meal off the outlet crotch of said rollers, and further grinding means located for receiving said clean meal and for converting it to greater fineness.

8. In a milling plant comprising grinding means for preliminarily converting corn containing garlic into a coarse meal, an air-tight gate receiving said meal from said grinding means, an upstanding hopper having a top aperture connected to said gate, a baffle slanting from the edge of said aperture, an inclined plate extending downwards in said hopper from a position adjacent said aperture and at an obliquity reverse to that of said slanting baffle, said plate terminating at a distance from the bottom of the hopper, spaced projections on the plate, an upstanding air pipe having regulatable air intakes at its lower end and connected at its upper end with the bottom of the hopper, the back surface of said plate defining in conjunction with the wall of the hopper an air duct, means for creating an ascending air draft through said pipe and duct, damper means in said duct for regulating the intensity of said draft, an expansion chamber connected to the upper end of said duct, a pair of revoluble rigid rollers receiving the meal flowing down through said pipe, one at least of said rollers having a garlic-picking knurled surface, friction means doffing said surface, means for separately collecting the garlic seeds off the friction means and the clean meal off the outlet crotch of the rollers, and further grinding means located for receiving said clean meal and for converting the same to a state of greater fineness.

CHARLES MENEUX.

SYLVAIN BOURDIN.

LOUIS CHAUSSt.