US103569A - Improvement in machinery for calendering- and polishing paper - Google Patents

Description

P. GOBURN. MACHINERY FOR GALBNDERING AND POLISHING PAPER.

N0.1os,569. Patnted May s1, 1870.

laittd states Latent chillin.

PHINEHAS GOBURN, 0F EAST WALPOLE, MASSACHUSETTS.

Letters Patent No. 103,569, lated May 3,1, 1870.

IMPROVEMENT IN MACHINERY FOR CALENDERIN G- AND POLISHING PAPER..

The Schedule referred to lx1 these Lettere Patent and making part of the same.

To all to whom these presents shall come Be it known that I, PHINEHAS GOBURN, of East WValpole, in the count-y ot' Norfolk and Commonwealth ot' Massachusetts, have made an invent-ion of a novel and useful Improvement in Paper-Machinery; and do hereby declare the following to be a full, clear, and exact description thereof, due reference being had to the accompanying drawing making part ot' this specification, and in which- Figure 1 is a front elevation, peut section, and

Figure 2, a transverse section of a calender-roll, so-called, embodying my improvement.

This improvement relates to that portion of paper-making machinery which polishes or glazes the surface of the paper, as well as condenses its bulk.

Herctofore this result has been effected by passing the paper, either in acontinuous strip, as manufactured upon the machine., or in sheets, between revolving cylinders under pressure, ,the surface of these cylinders being in some instances composed of castiroii, and iu others of paper coiled edgewise about a shaft or body, these latter being very costly.

The periphery of these i'olls or calenders,7 as they are technically termed, soon becomes indented and scored or abraded to sncli an extent as to injure or dislignre the surface ot' the paper, and requires to be often removed, placed in a lathe, and turned oli" to a smooth surface.

The object of my present improvement, as herein embodied, is to produce a calender or polishing-roll which, while imparting a brilliant polish and hard surface to the paper, shall possess the qualities of comparative cheapness and durability and requiring little, if any care.

This invention consists in the employment of a series oth long, thin steel plates of equal size, tixedatone edge, and at regular intervals, to the periphery of a metallic shaft, parallel thronghoutto the axis of the latter, and' departing therefrom at a curved tangent, the width of these plates, and t-lie nature of the curve described by each, being such that they intersect cach other, and constitute in aggregate a cont-inlnous elastic or yielding surface or polishing circumference.

The accompanying drawing represents, at A, a

straight cylindrical metallic shaft.

Within the periphery of this shaft, from end to end thereof, or substantially so, and extending entirely about the same, I cut a series of saw-kerfs or channels a o, &c., such channels being disposed at equal distances asnnder, and in parallelism with each other, and in alignment with the axis of the shaft.

B B, Ste., denote a series of long, thin, rectangular steel plates of like size and form, and ot' equal number with the channels a a, 86e., one edge of such plates extending into one ofthe said channels a af,

until each is supplied, the plates being secured thcre- 4 in by mechanical means', if considered necessary or judicious.

As before premised, the plates or wings B B, Ste., depart or emanate from the shaft A at such a curved tangent thereto as to intersect and overlap oneanother at a very acute angle, by this means producing a practically continuous surface or circumference, which possesses inherent elastic properties, owing to the sliding ot the free end of one plate upon the curved body of itsneighbor, when subjected to torsive or radial strain. A

In use the above-described roll revolves in contact with or in the neighborhood of a stationaryr bed or another roll, whether of like character or of a solid and inelastic nature, the paper to be polished or glazed being passed between the two.

Should hard foreign substances lind access between the two rolls, as now often occurs, to great damage of the calender7 roll, the elastic or yielding nature of my roll allows them to pass through without injury tothe latter, thus securing one very important advantage over others in use.

A second advantage of my roll, as herein described, will be found in the facttliat its circumferential steel plates may be hardened, thus not only producing a more elfective polishing-surface to act upon the paper, but rendering the plate very durable.

llhird, in addition to the advantageous surface acquired by the hardening of the plates B B, the peculiar drawing motion exerted bytheui upon the paper has the eiect of imparting, with comparatively little pressure, a very brilliant and hard polish to the snrface of the latter.

Having thus described the nature, uses, and advantages of my invention, and the' manner in which the saine is te be practically carried ont,

I claim as my invention, and desire to secure by Letters Patentofthe United States, the following, to wit:

Claims.

l. A metallic calender roll, for polishing or glazing paper, the periphery of which is elast-ic or yielding, for purposes herein stated.

2. A ca-lendei"7 roll, for polishing or glazing paper, composed of an axial shaft or body and series of curved tangential plates or wings, emanating there.- fioni in such mauiicr as to overlap each other, and produce a practically continuous surface, whereby I produce results herein set forth.

3. A calender or polishing roll for paper niachinery, composed of a central shaft or body anda series ot' hardened steel wings or tangential plates, substantially as and for thc purpose herein shown and described.

PHINEHAS COBURN.

Witnesses:

H. E. CoBUnN, G. N. CoBURN.

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