Dbying thick paper
US 11411 A
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Description (OCR text may contain errors)
E. & J. R. CUSHMAN.
Patented Aug. 1, 1854.
QMNIU OONBD N KPN UNITED sTArns PATENT onirica. A
. E. CUSHMANANI) J. R. GUSHMAN, OF AYIEIIIRSL,` MASSACHUSETTS.
innYING THICK PAPER.`
`Specification of Letters Patent No. 11,411, dated August 1, 1854.
To all 'whom t may concern i y Be it known t-hat we, ErHnaiM CUSHMAN and Jol-IN R. CUSHMAN, of Amherst, in the county of Hampshire and State of Massachusetts, have invented a new and Improved Machine for Drying Thick Paper (Such as is Used by Bookbinders and for Making `Boxes and Similar Purposes) in the Process of Making; `andiwe do hereby declare that the following -is a full and exact description thereof, reference being had to the accompanying drawings, making part of this specification, Figure `1 being a plan o-f the machine; Fig. E2 avertical section thereof in the,` line m of Fig. l, and Fig. 3 a vertical section of the same in the line 'y of Fig. l.
Like letters designate corresponding parts in all the figures. i
In the ordinary process of manufacturing the above mentioned kinds of paper, on account of the thickness of the sheetsand their liability to warp, it has been found impracticable to dry the paper properly, except by i placing the sheets on the ground in suitable weather during the summer season, and'afterward subjecting them to pressure to restore them to shape, as otherwise they would warp so much as to make it impossible to shape them. lConsequently the manufacturer is obliged to preserve constantly in a damp state, all the paper madeat other I seasons of the year till the next summer arrives, by sto-ring it away, before drying,
' in heaps where itwill be kept in a V.moist state'. The large amount of stock thereby required to be kept on hand for months, rew quiring additional outlay of capital, and the room required for fits storage, together with the greater labor, trouble and uncertainty of manufacturing make this. process inconvement, tedious and expensive.
The nature of our invention consists in Vdrying thick paper uniformly and without ened or pointed so as to present no appreci` able surface of contact, which, as soon as the paper has become sufliciently hard by .A partially drying, are let down upon the sheets and keep them in proper shape till the process is completed, substantiallyin the 5 manner hereinafter set forth.
form substantially as shown at d, Fig. 2; ,Each of these weights is of a size sufficient to cover a sheet of `paper to be dried; and is constructed of a series of parallel and cross bars, similar to the bars of a grate or of lattice work, as represented in the drawings. These bars are of suficient thickness and depth to produce a 'weight heavy enough to keep the paper from warping. Their lower edges are sharpened to an angle, as represented by the weights B, and' C, or notched to points, as shown by the weight D, Figs. 2 and 3; so that no appreciable surface of contact shall be presented to the sheets of paper, when let down upon them', because, if, vthere should be such a contact that a portion of the paper should be eX- cluded from the atmosphere, it would be impossible to'dry the paper uniformly. As soon as the paper, which at first is in a pulpy state, has dried suiiiciently to receive the weights without becoming injuriously indented by the edges or points thereof, said weights are let down upon the sheets, and in that position, prevent them from warping `till perfectly dried. The weights are then raised, and the sheets removed, to be sup-` plied by fresh sheets.
For the purpose of conveniently raising and lowering the weights, a frame work E, may be erected above the platform, and provided with pulleys e, e, overwhich cords, or chains, f, 7, attached to the several weights, pass, as shown on the drawings. `Each of the weights is described as composed of parallel and cross bars, which form is most convenient; but it is obvious that any other form of arrangement may be employed, provided the under edges of the bars are sharpened or pointed substantially as described.
What we claim` as our invent-ion and desire to-secure by Letters Patent, is-
Our improved artificial process of drying thick paper and at the same time preventing improved machine for drying paper signed it from warping out of shape; to Wit; by and witnessed this 11th day of April 1854. placing the sheets in a pul. y state, upon EPHRAIM CUSHMAN. heated tables or platforms an allowing them JOI-IN R CUSHMAN, 5 to remain until they harden to such a degree Witnesses to the signature of Ephraim as to begin to Warp out of shape, and then Cushman: causing open, or lattice, Weights to be let I. N. HALL, dovvn upon them, which rest upon thin edges A. R. CUSHMAN. or points at different parts of the sheets, and Witnesses to the signature of John R. 10 preserve them in flat positions until entirely Cushman: dry, substantially as herein set forth. l E. CUSHMAN, J r.,
The above specification of our new and L. MERRICK.