US104282A - Improvement in the manufacture of paper - Google Patents

Description

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Letters Patent No. 104,28

2, dated J une 14, 1870.

The Schedule referred ,to ln these Letters Patent and making part of the same To whom'fit may concern Be it known that I, LEVI DODGE, of' lVaterforiL- in the county of Saratoga and State of' New York, have invented certain new and useful Improvements in the Manufacture of Paper, of which the'following is a speciiication.

This invention relates tothe drying of paper, and

particularly of thick paper, which is slow to dry.

The drying apparatus'whieh. at present is usually employed isgenerally'connected, and forms one machine with. the making apparatus, and consists of a considerable number of heated cylinders geared together, over and under which the paper sheet, as it is fed on an apron from the making7 apparatus, travels until it is dried. f

lThe principal objections to this Inode of drying are, that it requires too much room or space, as the apparatus is necessarily large, and it is also expensive, both on account of the cost of the apparatus, and of the power and lincidental expenditures required to and to keep it in working order; for instance, a N 50 sheet ofpaper weighing one pound takesfifte'en minutes to dry, and, as the making7 machine from which the sheet is fed runs at the rate of sixty feet per minute, the drying apparatus, which is connected with it, must run at'the saine rate of speed, so that the paper will travell nine hundred feetbefore itis dried. It is manifest, therefore, that the apparatus is necessarily large in order to admit of this travel of the paper, and must occupyinueh space. In the above example, there would be, in the drying apparatus, from one hundred and seventy-five to two hundredheated rolls geared together, and, 'necessarily the expense of the apparatus would be great. Moreover, a loss by radiation of heat from so many cylinders would uuavoidably occur,A the consumption of lubricating-oitaud cost of steam-fittings would be considerable, and, owing to the iiction, more power would be required to run the machine than if hut a single drying-cylinder' were employed.

The employment, however, ot' a single cylinder, when the drying apparatus is connected with the `making machine, is impractieable, as the drier must l rate of speed as the making machine, and consequently the paper will travel around, and leave the drying-cylinder before it `is dry; and therefore, in all eases where the making and drying apparatus form one machine, a great num` ber of drying-cylinders, or a great extent of dryingsurface, is required, in order to properly dry the pa-4 per.

My invention is intended'to obvia-te 'thesediniculties; and to this end, instead of allowing the paper poses, two or more may be employed, their to pass directly from the making machine to the drier, I wind it upon reels as it comes out of the making machine, and then convey the reels to a drying apparat-us, containing one or more cylinders, the speed of which is so proportioned to their size and the thickness of the paper that, by being once carried around the cylinder or cylinders, the paper will he dry, and ready for removal.

My invention consists, therefore- First, iu `subjecting the paper, after it leaves the making machine, and before it reaches the drier, to au intermediate reeling.

` Second, in the combination, with the drier, ofa series of reels, from which the paper to be operated on is fed to the drying-cylinder or cylinders.

The manner in which my invention or may oe carried into effect will he fully understood by reference to the accompanying drawing, which represents a perspective view of so much of a drying apparat-us as is needed in orde'r to illustrate my invention.

l'lhe paper to he dried is represented at le, and the reels upon which the same is wound areshown at 'bA .Lhc paper, after being produced in any suitable making machine, suoli, for-instance, as that for which I have obtained Letters Patent of even date herewith, iswhen it passes out from such machine, wound upon one or more reels.

When the reel has received the requisite quantity of paper, it is removed te thc drier, and its ljournals are placed in l'learings,I c, formed to receive them, and to support the reel in proximity and iu proper pesition with relation to the drier.

The drier, in this instance, consists of a single cylindex', A, with hollow journals, for the admission ofV steam to its interior, wherebyit is heated in the usual manner; and around thc cylinder are 'arranged one or more endless aprons or bands, l, passing over rollers, andv around the periphery of the cylinder, so as to hold the paper, und carry it alongr as the cylinder revulves,

lVhen hut a single cylinder is employed, its speed is so graduated, with respect to its diameter and temperature, and to the thickness of the pz r to be operated on, that the paper, by being carried once around with the cylinder, will be dry and ready for removal, in accordance with the method described in Letters Patent No. 56,732, granted to me on the 31st July, 1866.

In ease' one cylinder be nsnllicient for drying purspeed being also graduated iu a manner similar to, that above described, so that the paper, after passingover the last cylinder, will be dry and ready to be removed.

Cutters d may be employed, which are geared with Il The intermediate ,reeling of the paper bebween the drying-cyiinder, as usual, so. as to cut the paper, the making and the drying operations, asset forth.-

as it passes from the cylinder, into any desired lengths. 3. The apparatus or machinery substantially -as One, two, three, or more reels may be combined shown and described, for operation as herein set forth. with 'the drier, as desired. In testimony whereof` l have signed-my name to this Having now desciibed my invention, and the manspecification before two subscribing witnesses. g ner in whichy the same is or may be carried into e'ect, LEVI DODGE:

What I claim, and desire to secure by Letters Patent, is Witnesses:

1. Themethod, herein described, of drying paper A. POLLOK, made by machinery independently of the making i WM. H.,MCGABE.

operation.

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