Improvement in machinery for drying cloth
US RE1050 E
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Description (OCR text may contain errors)
f UNITED STATES PATENT OFFICE..
B. SEXTON, OF EAST WINDSOR, CONNECTICUT.
IMPROVEMENT IN MACHINERY FOR DRYING CLOTH.
Specification forming part of Letters Patent No. 28,202, dated May 8, 1860; Reissue No. l,050, datedl September 25, 1860.
To all whom, it may concern:
Be it known that I, BEZALEEL SnX'roN, of East Windsor, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Machinery for Drying Cloth and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specification, in whichl Figure l is aside elevation 5 Fig. 2, a plan or top View, and Fig. 3 a longitudinal vertical section taken at the line A a of Fig. 2.
The same letters indicate like parts in all the figures.-
My invention relates to an improvement in machinery for dryin g cloth by currents of air carried against and through the cloth to produce the same effect as if dried in the open air, and thereby avoid the delay, labor, and expense of such mode of drying, and at the saine time avoid the bad effects due to drying cloths in contact with heated metal cylinders, as heretofore generally practiced.
In the said machine the cloth to be dried passes over the periphery of two wheels or equivalents armed with suitable tenter-hooks or other equivalent means of holding the two selvages of the cloth and keeping it distended as it travels, to present in succession every part of its surface to the drying iniuence. The wheels or plates form the ends, and the cloth to be dried the greater part of the periphery of a hollow vessel, leaving a segment through which a current of air is to be introduced to the inside of such hollow vessel to act against the under surface of the cloth, so forming the residue of the periphery, and to pass through its pores when porous to effect the drying.
My said invention consists in combining to gether the wheels armed with tenterhooks or their equivalents, and forming the ends of a hollow vessel, the arrangement of rollers or their equivalents for presenting and drawing off the cloth that it may, in passing around the said wheels or their equivalents, form a portion of the outer periphery of they said hollow vessel, and a blowing apparatus or the equivalent thereof outside of the said hollow vessel, and so arranged that the current of air shall enter the said hollow vessel through the segment of the hollow vessel, between the ends thereof and between the place where the wet cloth begins to form part of the periphery of the hollow vessel, and where it is drawn off dry.
In the'accompanyingdrawin gs, a represents a suitable frame, and b a horizontal shaft mounted in suitable boxes at the upper part of the frame, and provided at one end with a hand-wheel, c, or a crank-handle, by which it can be turned when desired. This shaft lisy formed, as at d d, from each journal toward the middle, with a right and left handed screw, to which are tapped the hubs of two wheels or disks, e e, so that by turning theY shaft in the wheels or turning the wheels on the shaft the wheels will be drawn closer to each other or separated to suit different widths of cloth, or to stretch the cloth after it has been put onto the wheels, as will be hereinafter described. The two wheels e e are provided with tenterhooks ff, projecting from their peripheries and near the inner edges thereof, to catch and hold the edges of the piece of cloth g when introduced, and to hold it across the space between them.
The end of the cloth g, taken from a roll presented in any suitable manner in front of the machine, is passed over a guide-roller7 I1, and thence passes under a stretching-roller, 1', formed with a right and left handed thread at the ends to stretch the cloth in the direction` of its breadth as it passes through. From this stretching-roller the cloth is carried over another guide-roller, j, under another guideroller, lc, and thence Yin front of a guard-plate, l, where it is presented tothe periphery of the two wheels e e and caught and held by the tenter-hooks. The wheels are .then turned in the direction of the arrow until the forward end of the cloth reaches the lower e'dge of the guardplate l, and it is then carried around a guide-roller, m, back under a series of guiderollers, n o, by a'rapidly-rotating brush, p, to I and over a guide roller, q, thence under a iuted roller, 9^, by which it is pulled through the machine, and thence over another guide roller, s, from which it hangs and drops ont-o any suitable receptacle. Y .y
The iuted roller r' receives motion from a driving-shaft, t, by a train of band and cog wheels, vLa e w a: forthe purpose of drawing the cloth through the machine at the required speed to effect'its drying, and by being thus y periphery by the piece of cloth to be dried,
except a segment for the introduction of the air, which segment I prefer to closeup by the guard-plate l. This plate is pierced with numerous holes, y, along the middle of its width, which holes communicate with a wind-box, z, into which a blast of hot air is forced by a suitable blower, a', to be driven vat a high velocity by suitable and well-known means. In this way it will be seen that a blast of heated air is continuallyy blown into the hollow cylinder and through the pores ofthe cloth,
' if it be pervious, thereby not only having the effect to dry the cloth by evaporation, but to force the moisture out ofthe cloth, and at the same time raise the knap on the cloth. And I also avoid an inconvenience heretofore eX- perienced in machinery or apparatus for drying cloth, and that is, that the heated air after taking up moisture by contact with a part of the cloth is not brought in contact with the other parts thereof.
The motion ot' the cloth can be so regulated relatively to the blast, the condition of the air, and the amount ot moisture in the cloth as to insure its being thoroughly dried before it is drawn ott'. Cloth dried in this way will be found to have all the softness of cloth dried in the open air by the well-known hand process.
W'Then my said invention is to be applied to the drying of cloths or fabrics which are not pervious to air, or which are of such close texture as to prevent the passage of air by the use of a blast7 I prefer to leave sufficient space between the cloth and the periphery of the wheels 'e e for the escape of air from the in side of the cylinder. And althoughI have herein described the use of a blast of heated air and the production of the required current by a forcing blower, I do not wish to be understood as limiting myself thereto, as atmospheric air,
without being articiall y heated, may be' used, and in some instances it may be desired to use other gases. And instead of blowing a blast of air within the cylinder a like result may be obtained by incasing the apparatus and eX- liausting the air therefrom that the current' may be induced by the pressure ofthe atmosphere. And although I have above described the use of two wheels as a means of forming a hollow space surrounded bythe cloth to be dried, and deem that the best mode of applying the principle of my said invention, neverthelessI do not wish to be conned thereto, as i other and equivalent modes of application may be substituted, such as two endless chains or bands traveling on, or at, or near, the ed ges f of two end plates,tlie said chains or` bands `1 being provided with tenter-hooks or other suitable means for holding the selvages or edges of the cloth; or the end plates may be so formed or provided with suitable means for holding the edges or selvages of the cloth as to allow the cloth to move thereon or therein, and although these and other modilications may be made, I prefer the mode of application which .1 have adoptedand above specically described.
I do not ciaim as my invention the drying of cloth by machinery which forces a blast or current of air against and through the pores thereof.
What I do claim as my invention, and drsire to secure by Letters Patent, is-
Gombining with the wheels armed with tenter-hooks substantially as described, the arrangement of rollers, or equivalent thereof, for presenting and drawing olf the cloth, so that it shall form part of the periphery of a hollow vessel, substantially as described, and au apparatus substantially asA described for introducingablast of air through the segment of the periphery of the said hollow vessel, between the end wheels, and between the place where the wet cloth begins to form the periphery of the said hollow vessel, and where the dry cloth is drawn off, substantially as and for the purpose specified.
B. S EXTUN.
Witnesses HENRY Pnannnn, E. H. Woonwann.