US959722A - Drying-machine. - Google Patents

Description

G. A. GUTTER.

v DRYING MACHINE. APPLICATION FILED APB.. 19, 1909.

2 SHEETS-SHEET l Patented May 31, 1910.

G. A. GUTTER.

DRYING MACHINE.

APPLICATION FILED APR. 19, 1909.

Patented May 31, 1910.

2 SHEETS-SHEET 2,

U15/1 assess Aran! GEORGE A. CUTTER, OF TAUNTON, MASSACHUSETTS, ASSIGNOR T0 CELL DRIER MACHINE COMPANY, A CORPORATION OF MAINE. l.

Darme-MACHINE.

lApplication led April 19, 1909. Serial No. 490,908.

To all whom it may conccrmi Be it known that I, GEORGE A. Curran, a citizen of the United States, residing in Taunton, in thecounty of Bristol and `State of Massachusetts, have -invented an Improvement in Drying-Machines, of which the following descri tion, in connection with the accompanying rawings, is a specication, like letters\on the drawings representing like parts. 1

The present invention relates to a drying machine, and is embodied in a machine of that class in which the material or article to be dried is `conveyed through the apparatus, and held in contact with or adjacent to a heated drying surface, or surfaces, by a suitable conveyer, such, for example, as an endless band of felt, or other suitable material. Such machines are used for drying pulp, paper, raw stock, such as wool, granular material, or separate articles suchas cuffs, hosiery and the like-or in fact any material or article the nature of which is such that itcannot be drawn through the machine without a carrier of some sort. Such machines are also used 1n some cases w1thV material v1n web form, where 1t 1s desired to obtain extra pressure against the drying surfaces, or when the strength of the material is insufficient to admit of pulling it through the machine. In a machine vof this class, the moisture driven off from the material or article being dried, must also pass through the conveyer; and naturally is to a certain extent retained thereby. It is desirable, therefore, to provide the lappara` -tus with means' for drying the conveyer itself, during the operation, so that the mois- -ture retained therein will not check the drying of the material going through. For this purpose, the machine is provided with l,supplemental drying elements arranged in the ath of the conveyer, s o that the conveyer in its travel passes in near proximity to or in actual contact with. the'surfaces of the supplemental dryingelement, so as to beheated to evaporate the moisture absorbed from the materlal being dried.`

' The supplemental drying elements, herein shown as stationar cells, may be disposed between adjacent rying cylinders, .or may ,be grouped in the return loop 'of the conveyer, or maybe disposed inY any suitablev way to -act -upon the conveyer when the said the regular 1n means combined with the stationary cells for laterally stretchin the conveyer, which may consist of an en less band of felt, so as to maintain an even width thereof and tov prevent the felt from lar drying cylinders. This is accomplished by providing the surfaces of the supple-v mental stationary cellslwith divergent ribs, the' said ribs diverging from the middle toward the edges in the direction of travel of the conveyer over the cells.

`Figure 1 is a perspective view, partly in section, of aportion of a drying-'machine embodying the invent-ion; kFi 2 is a side elevationof a felt drying cel constructed as shown in Fig. 1; Flg. 3 is a similar view of a felt drying cell showinga modification; land Fig. 4 1s a perspective v1ew of a machine .showin a modification in the arrangement of the rying cells. j

The machine embodying the invention comprises the heated rotating clyinders a around which travels the conveyer, herein shown as an endless band of felt, or other suitable material, indicated by the reference letter b, the material to be dried bein carriedk through the machine around the rying cylinders a, andthe intermediate cylinder c, the felt conveyer serving to hold the material in close contact with the surfaces of the cylinders a, and, at the same time, tofsu port the material and aid in conveying t esame throughv the machine.

In the construction shown in Fig'. 1, the

band b extends only over the lower cylinders, the material not being protected by the felt asit passes over the upper intermediate cylinder c. In order to keep the conveyer d that is to say, to carry olf the moisture a sorbed from the material inlthe drying operationthe machine is provided with sup plemental drying members for alone, the said membersin the construction shown in Fig. 1 consisting of stationary cells d arranged at intervals along the machine between adjacent felt-carrying drying cylinders a. From the cylinders a, the felt is carried over idler rolls e, e2, e", there beting two 4of the rolls adjacent to the upper portion of the cell d, and one roll adjacent t'othelower portion thereof, so that the fltlwill travel.

Patented May 31, 191e.

puckering on the reguthe band I freely with tlie opposite surfaces of the cells d. In -order to obtain a stretching efect, and thereand at the same time lie in contact by maintain the normal Awidth of the felt while it is traveling through the machine,

and prevent the same from puckering or wrinkling, the cells d areprovided with projections or ribs d2 which diverge from the middle of the'cell in the direction of travel of the felt, so that the said ribs tend to push the surface of the felt outward toward the ends of the drying cells. A In the construction shown in- Fi 2, the divergence of the ribs d2 increases om the middle toward the ends of the cells, so that the action on the felt is gradual, the stretch- ,ing effect increasing toward the edges of the located between adjacent cylinders. It is practical, however, to locate the felt drying cells in the return loop of the band of felt, so that it first passes `over the drying surface for the material, and-is subsequently passed over the drying cells before again coming into operation to convey the material. Such' a construction is indicated'in Fig. 4, which is shown, for convenience, as comprising a machine having only one drying-cylinder, it

being obvious, however, that the felt might be carried over a pluralit of drying cylin-l ders insuccession', as in t e machine shown in Fig. l, and then returned in al single loop around and out ofcontact with the cylinders.

In the construction shown in Fig. 4, the

l conveyer, after passing over the drying cyli inder or cylinders into contact with which it is guided `by means of idler rolls D and D2,

. is returned out of contact with the drying cylinders, and during its .return travel is subjected to the action of the drying cells E4 f which may be suitably arran ed so as to afford an adequate drying sur ace with the least amount of objectionable friction. In order that the conveyer ma be subjected to the drying action at both si es, the cells may be staggered, asindicated at the upper part of Fig. 4, so that the felt passes over `one and under another, and itis obvious that this arrangement might be repeated, if desired, al-

though it is practicable to arrange the additional cells, as shown in Fig. 4, with the conveyer passing over only one surface thereof.

It obvious, however, that the arrangementof the cells may bevaried, the specific construction and arrangement shown not being. essential to the invention.

Claims. l. 1i In a drying machine, the combination with rotatable drying cylinders; of an end-l lessl conveyer of felt or other suitable material held in contact'with said c linders; and a stationary heated drying ce projecting into the path ofA said conveyer and lying in contact therewith at points where said convelyer is not in contact with the cylinders. 2. a drying machine, a pluralit heated cylinders; an endless conveyer a apted to travel in peripheral contact with said cylinders; `a stationary heated drying cell projecting into the path of said conveyer and means for guiding said conveyer whereby it comes in contact with said drying surfaces.

3. In a drying machine, a pluralit of heated cylinders; an endless conveyer a apted to travel in peripheral contact with said cylinders; a stationary heated drying cell the surface of which is rovided with projecting engaging parts iverging from the middle thereof toward the ends thereof; and means for guiding said conveyer whereby it comes in contact with said surface.

4. The herein described; dryingv element for 'a continuously traveling web, which is provided with a surface-portion adapted -to be heated and to be located in contact with said -traveling web, and diverging ribs or projections on said surface.

5. The herein described drying element fora traveling web, whichcoi'isists of a stationary heated element having a convex surface provided with projecting engaging parts diverging from the middle of' said` element toward the ends thereof.

6. A stationary d g element for a traveling web, consisting of a steam heated cell havin a convex surface provided with ribs exten g along said surf-ace substan-d tially in the direction of travel of said web,

said ribs divergin from the middle toward the ends of the gence being progressively increased.

7. A drying machine having a plurality of rotatable drying cylinders; an endless `conveyer; idler rolls whereby said conveyer is held in contact with the periphery of the cylinders throughout a portion of its travel; stationary heated dryingcells; and means for guiding said conveyer into contact with said stationary cells during another portion of its travel. Y

In testimony whereof, I have signed my name tothis specification in the presence of two subscribing witnesses. ,I

GEORGE A. CUTTER.

Witnesses:

JAS. J. MALONEY, M. E. CovENiiY.

andthe angle of diver-

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