US1259675A - Drying-machine. - Google Patents

Description

F. G. SARGENT DRYING MACHINE.

APPLICATION FILED JULY 11. 1917.

Patented Mar. 19, 1918.

SHEETS-SHEET L F. G. SARGENT.

DRYING MACHINE.

APPLICATION HLED JULY 11. 1911.

1,259,675. Patented Mar. 19, 191&

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FREDERICK G. SARGENT, OF WES'IFORD, MASSACHUSETTS, ASSIGN'OR TO C. Cr. SARGENTS SONS CORPORATION, OF GRANITEVILLE, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

DRYING-II IACHIINE.

Application filed July 11, 1917.

To all whom "it may concern:

Be it known that I, FREDERICK G. SAR- enn'r, a citizen of the United States, residing at Westford, in the county of Middlesex and State of Massachusetts, have invented a new and useful Drying-Machine, of which the following is a specification.

This invention relates to a drying machine, particularly of the type in which wool, cotton or other similar substances are carried through a drying chamber by a movable screen or carrier.

It is the object .of my invention to improve the construction of such drying machines to the end that a more effective circulation of air may be secured, thereby increasing the efficiency of the machine.

I have discovered that it is desirable in the operation of this type of drying machine to admit a certain amount of fresh outside air to the machine during the operation thereof and at the same time to exhaust and remove a corresponding portion of the air which has been circulating through the stock. I have also found that it is desirable to recirculate a certain proportion of the air in the ma chine as by so doing it is not necessary to heat up so large a quantity of the relatively cool outside air. Accordingly, an important feature of my invention relates to a drying machine in which provision is made for recirculating a portion of the air passing through the stock and for exhausting and removing the remaining portion of the air, replacing the same with an equivalent amount of fresh air.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of my invention is shown in the drawings, in which Figure 1 is a front elevation of a portion of a drying machine embodying my improvements Fig. 2 is a transverse sectional elevation of the exhaust mechanism, taken along the line 2-2 in Fig. 1;

Fig. 3 is a horizontal sectional view taken along the line 33 in Fig. 1;

Fig. 4 is a longitudinal sectional elevation taken along the line 1- 1 in Fig. 3, and

Fig. 5 is a transverse sectional elevation Specification of Letters Patent.

Patented Mar. 19, 1918.

Serial No. 179,811.

of the admission and circulating mechanism, taken along the line 55 in Fig. 1.

Referring particularly to Fig. 1, I have shown a portion of a drying machine comprising a casing 10 through which the stock is carried by a traveling screen or carrier 11. Feeding mechanism 12 of the usual type may be provided for depositing the stock upon the screen 11. Suitable heaters 13 are also provided for agitating the stock as it passes through the machine.

V1 hile I have shown in the drawings only a single unit or section of the machine it will be understood that a complete machine may. comprise several such units, the length of the machine depending upon the nature of the work which it is designed to perform.

Below the plane of the screen 11 the casing is divided by suitable partitions into admission chambers 15 and 1.6, an air heating chamber 17 and an exhaust chamber 18, the admission and exhaust chambers being separated by partitions 19 and 20 best shown in Figs. 3 and 4-. These partitions extend vertically between the upper and lower runs of the screen 11 and are connected by a bottom 21 to form the exhaust chamber 18 having an opening 22 into a flue 23 through which the air is drawn out by an exhaust fan 24 and e ected through the outlet pipe 25.

The air heating chamber 17 is separated from the admission and exhaust chambers by a vertical partition 26 extending longitu dinally of the machine. Openings 27 and 28 through the lower part of the partition 26 connect the admission chamber 15 and 16 to the air heating chamber 17. Doors 29 and 30 may be adjusted to regulate the amount of air flowing through the admission chambers, and fans 31 and 32 draw the air into the heating chamber which is provided with the usual coil of steam pipes 33. Through this coil the air circulates in an upward direction, finally passing over the upper edge of the partition 26 and being drawn down through the stock S upon the screen 11.

In passing through the air heating chamber 17 air from the admission chambers 15 and 16 is more or less uniformly distributed throughout the entire length of the chamber so that every portion of stock on the carrier is subject to the drying action of the heated air. The air which passes through the stock near the two ends of the unit passes down into the admission chambers 15 and 1G and is then recirculated by the circulating fans 31 and 32. The air which passes through the stock near the center of the unit, however, passes directly to the exhaust chamber 18 and is removed therefrom by the exhaust fan 2A.

It will thus appear that a certain portion of the air passing through the stock returns to the admission chambers and is recirculated, while the remaining portion of the air passes through the exhaust chamber and is returned to the atmosphere The air thus exhausted and removedis replaced by a corresponding amount of fresh air, the admission of air being regulated by adjusting the doors '29 and 30. By thus recirculating aportion of the air and exhausting and replacinganother portion of the air I am able to dry the stock in a very efficient and satisfactory manner.

While I have herein shown a unit comprising two admission chambers and a single interposed exhaust chamber, my invention is not limited to this particular arrangement as I may use either one or more admission chambers in connection with one or more exhaust chambers, as is best adapted to particular conditions.

Having thus described my invention, it will also be evident that other changes and modifications can be made'therein by those skilled in the art without departing from the spirit and scope of my invention as set forth in the claims, and I do not wish to be otherwise limited to the details herein disclosed, but what I claim is 1 In a drying machine, a casing, a stock supporting screen movable therein, air heating devices, exhaust apparatus, means to conduct heated air from said devices to the space above said screen, and a plurality of separate passages below the working run of said screen effective to receive said air, part of said passages being connected and effective to return a portion of said air to said heating means, and another part of said passages being connected to said exhaust apparatus by which a portion of said air is removed from said casing.

2. A drying machine having, in combination, a casing, a stock supporting screen movable therein, separated adjacent air admission and air exhaust chambers beneath said screen, an air heating chamber, connections from said admission chamber to said air heating chamber. below the level of the screen, and additional connections from said air heating chamber to said admission and exhaust chambers above the level of the stock, whereby a'portion of the air is recirculated and the remaining portion thereof is continuously exhausted.

3. A drying machine having, in combination, a casing, a stock carrier movable therein, said casing having inlet and exhaust passages beneath the working run of said carrier, separated by partitions extending transversely of the casing, and each passage being open at the top thereof adjacent said carrier, a chamber to which all of said passages are connected at one end, means to draw air into said casing, and means to exhaust air therefrom, whereby a portion of the air passing through the screen and stock is recirculated and the remaining portion is removed by the exhaust apparatus.

4:. A drying machine having, in combination, a casing, a stock supporting screen movable therein, and an air heating chamber in said casing, the portion of said casing below the working run of said screen being separated into admission and exhaust chambers so disposed that air from said admission chamber passes through the heat ing chamber and through the screen with its supported stock, a portion of said air then recirculating through the admission and heating chambers, and the remaining portion passing out through the exhaust chamber. V

5. A drying machine having, in. combination, casing, a stock carrier movable therein, exhaust apparatus, and means to heat the air and deliver it to the upper part of said casing above the carrier, the space below the carrier being divided into. separate chambers connected to said heating means and said exhaust apparatus respectively.

6. A drying machine having, in combination, a casing, a stock supporting screen -movable therein, exhaust apparatus, means to heat the air and deliver it to the upper part of said casing above the stock carrier, and partitions dividing the space below the screen into a pair of separated chambers connected to said heating means and an, in terposed chamber connected to the exhaust apparatus.

In testimony whereof I have hereunto affixed my signature.

FREDERICK G. SARGENT.

Copies 01 this patent may be obtained for five cents each, by addressing the Commlssioner of Barents.

Washington, D. 0. r

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