US1919057A - Drier - Google Patents

Description

July 18, 1933. F. L.. FURBUSH DRIER Filed March 14, 1932 m O`OO m uOOOOOOOOOO O O NNMuooooooo III/l Patented July 18, 1933 UNITED STATES lPATENT ori-1c FRANK L. FURBUSH, OF GRANITEVILLE, MASSACUSETTS, ASSIGNOR T0 C. G. SAR- GENTS SONS CORPORATION, OF GRANITEVILLE, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS DRIEB Application led March V14, 1932. Serial No. 598,776.

This invention relates to a drying machine for drying purposes in general but it is Darticularly applicable to a machine for drying fibrous material such as wool.

The principal object of the invention is to provide improved means for directing fresh air from the outside to a proper point to cool the stock and prevent the hot air in the machine from going out into the room and .also to provide for proper regulation of the air so that fresh air can be admitted at another point if found necessary to reduce the pressure of the air on the stock on the conveyor or apron which carries it through the machine. v

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawing, in which Fig. l is a longitudinal sectional view through the whole length of a drier constructed in accordance With this invention, and

F ig. 2-is a sectional View on the line 2-2 The invention is shown as applied to a drier of Well-known type in which the material is fed from a bin 10 by means of an au-,

tomatic feeder 11 therein and deposited on the main conveyor or apron 12 in the drier. This latter apron conveys the material in a loose condition through the drier to the doffer end where it passes over a cylinder or drum 13 which also supports that end of the endless conveyor. Above the longworkingstrand of the conveyor 12 are located steam-heating pipes 14 in a compartment of the usual character. Below the conveying strand of the apron 12 but at one side are located fans 15 as usual which are designed to draw in tb fresh air at` the doffer end of the drier and force it upwardly over a partition 16 and then downwardly through the pipes 14 and through the brous material on the top strand of. the apron 12. The air for this purpose comes in at the dofl'er end as stated.

It isa well-known expedient to let the air in at the dofer end over the material on the apron 12 and through a partition 17 which is provided with an opening having a damper coming in over the material blow out into the room through the opening I in the partition 17. Furthermore, the air on the conveyor at the doli'er end may be drawn in so rapidly by the series of fans 15 located along the side of the drier as to press the stock down on the conveyor and not allow-enough air to go down through it.

By this invention, an additional partition 20 is employed spaced from the partition 17 and close to the dofer end of the machine. This partition extends all the way from the bottom of the drier to a point just under the upper strand of the apron having of course an openingthrough it for the lower strand and apron. It is provided with an opening through it and a damper 21 which can be opened more or less or closed entirely according to the circumstances by means of a shaft 22 and hand wheel 23;

It will be seen that by this arrangement a compartment 24 between the partitions 17 and 20 is provided which is substantially enclosed. Now the air coming in through the stock on the conveyor at the top of this compartment in the old way can be regulated by means of the damper 21. If the pressure of the air is too great on the stock on the apron above the compartment 24, the damper 21 can be opened as much as may be desired to allow air to enter at that point and reduce the pressure of the air from above on the stock. At all times a considerable body of air will be drawn in through the stock from above to cool it. This construction also prevents the h ot air in the machine from blowing out into the room and thus reduces the expense of operation.

This furnishes a very simple and inexpensive construction for accomplishing these objects. It increases the eHiciency of the drier and enables the current of air pressing on the stock at the dofer end to be regulated whenever necessary to secure the proper cool` ing of the stock by this air before the stock is discharged from the machine.

Although I have illustrated and described only one form of the invention, I am aware of the fact that modifications can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore, I do not Wish to be limited to al1 the details of construction herein 'shown and described, but what I do claim is 1. In a drier, the combination withl a casing, an apron therein'for passing the stock through the drier, means for heating the drier, fans for drawing in the air from outside, a partition in the casing having a damper located at a distance from the doier end for admitting the air to the fans, means for admitting air to the drier through the stock at the doler end, and a second partition nearer the doi'er end than the first one having a damper for regulating the pressure of air on the top of the stock.

2. In a drier, the combination with a casing, an apron therein for conveying the stock through the drier, of tWo partitions near the vdofer end of the casing separated from each other, each having an opening provided with a damper and the drier having an opening above the stock at the doffer end, whereby the damper in the partition nearest the end can be used to regulate the amount of air which is admitted from above the stock and its pressure on the stock.

FRANK L. FURBUSH.

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