USRE1056E - Improvement in machines for drying paper and other fabrics - Google Patents

Description

PERKINS.

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UNITED STATES PATENT OFFICE.

EDVARD LQIERKINS, OF ROXBURY, MASSACHUSETTS.

IMPROVEMENT IN MACHINES FOR DRYING PAPER AND OTHER FABRICS.

Spcciiication forming part of Letters PatentI No. 24,328, dated June 7, 1859; Reissue No. 1,056, dated i October 9, 1860.

To all whom, it may concern: y Y

Beit known that 1, EDwARnL. PERKINS, of 1toxbury,in the county of Norfolk and State of Massachusetts, have invented certain Improvements in Machines for Drying Sized Paper and other Fabrics, of which the following is a full, clear, and exact description, reference b.-ing had to the accompanying drawings, in which is represented a I naehine for drying sized paper, constructed in substantial accordance with the principles of my invention, Figures 1 and 2 being central vertical sections at right angles to cach other through the machine.

The method heretofore most commonly practiced for drying certain fabrics has been to suspend them in a drying-room through which the atmospheric air was allowed to circulate; but it is manifest that in wetweather, or when the atmosphere is still, the operation will be but sluggishly and impert'ectly performed, and that that state of the atmosphere most conducive to the perfect success of the operation will not often exist.. lt is also evident that when the proper state ofthe atmosphere does not exist naturally it will not be practicable to remedy the diiiculty without the employment ot' artiticial means. For this purpose the goods have been suspended within a close chamber heated by steam, but the heated air soon became' loaded with moisture and the operation was but impert'ectly and slowly performed. hu'rents ot' heated air have also been blown directly' upon the goods to be dried, but the wantot' a suticient circulation by which the air, when once charged with moisture, could be withdrawn has prevented this plan t'rom becoming ultimately and generally successful.

The process ot' drying by passing the goods over the surt'ace of cylinders heated with lsteam will not answer for many fabrics, and is particularly inapplicable to the purpose ot' drying sized paper, owing to the injurious effect ot' the steam or vapor thus generated upon the size.

lo remedy all these ditiiculties is the object of my present invention, which consists in an apparatus in which the goods are subjected to the action of a heated atmosphere, which is immediately withdrawn so soon as it is charged with moisture and its place occupied witha fresh supply of heated air, the eit'ect thus produced being similar to the natural current ot' air upon a bright day, with this advantagethatit need never be interrupted night or day atany season of the year, or in any state of the atmosphere', Whether wet or dry, cold or Ilot.

In tlre accompanying drawings is represented an apparatus constructed for drying sized paper, in which the paper is stretched vertically over rollers, and is fed continnousl y through thedryi11g-chamberat the same time that it is exposed to the action ot' a gentle cur- .rent ot' air which enters the chamber through proper inlet-s in the bottom and is heated by passing in contact with coils of heated pipe, and ultimately escapes through suitable outlets in the top of the chamber provided for thepurpose. 'lheseinlets and outlets by which the circulation ofthe air through the chamber is guaranteed are absolutely essential in the carrying out of ,my invention, as thereby the deleterious effects of a strong blast upon the paper and of vthe presence of moisture during the operation are avoided, antLt-h process is rendered independent of the hygrometric or thermometric changes of the atmosphere.

al a -represent the supporting fratrie-work ot' theapparatus, at the bottom of which. are placed coils of pipes b b, heated by steam or otherwise, leaving apertures c c at the bottom for the inlet of the atmospheric air, which passes up between the coils and thereby'becomes heated.` Above the heating apparatus and communicating therewith is a box, d d,

between which the paper f j' is fed and made to travel vertically,being upon the delivering-- roll y and received as fast as dried upon the receiving-roll h. i i are outlets at the top ot' the apparatus, through which the heated air, steam, ttc., nds an easy escape. Air is received through the inlets c c at the bottom and passes, as shown by arrows in the drawings, up between the pipes of the heating and out through theapcrtures i i, thereby subjcctin g the paper to the action of a gentle current ot' air, which carries oit' all steam and moisture as fast as it is generated, instead of allowing the moisture to circulate about and remain in contact with the paper, which has drying before attempted.

lt will be observed, Fig. l, `that'the interiilled with a series of guiding-rolls, c e', Ste.,A

apparatus and between the guiding-rolls e e heretofore beenv unavoidable, by anyV inode ot 'from the lower to mediate guide-rolls, e, are so arranged as to deflect the fabric from the exact plane invwhieh it would otherwise pass from the lower to the upper rolls, e. Were the fabric run direetiy the upper carryingrolls without being deflected in the zigzag course shown in Fig. 1, that part of it which was midway between the rolls would shrink in it was stretched and be much narrewer than the portion which was entire relis, and as the fabric continued to iroqresstiirougil the rnachine it Wouid not remain distended ngen rolls, but would Wrin kie and uitinieteiy ere up into a masser rope near rolls. This would des my ra i machine for mest purposes.

The roiis c and e may in genera be pinned at a-distanee et" tWentyfour ineiaes or thereabout fromeenter to center in avertieai iine3 Vamithey should be so arranged to dedeot the fab-rie snioientiy fromt genera?, piane in which it moves te keep it eonstantiy :fgiit 'along the edges, as Well as aong the een er line of the piece. To prevent injury or strain to deiieate fab-v ries, the 'carrying-rolls e may have an Vequal surface-motion imparted te theta byzmeans of gearing or otherwise.

What claim as my invention, and desire to secure by Letters Patent, is

1. A drying apparatus consisting of the combination ofa drying-chamber with inlet and out-let' passages for insuring acirculation through it, an apparatus for heating the same, and suitable carrying-rolls for suspending the aigric vertically', or nearly so, in the dryingeiiamber, and for' carrying it into and through i the same.-v

2. The within-described arrangement of the carrying-rolls e and e with regard to each other, for the purpose of deflectin g the fabriclfroni a vertieal piane and` into a series of zigzag planes,i thereby making a series of bearing y `points, the eieet of which is to distend the fabrie equailyand prevent it lfrom roping up,

jas set forth. y

EDWARD L. PERKINS.

Witnesses:'

T Hos. R.- Renon,

P. E. TEscHnMACHER.

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