US 597405 A
Description (OCR text may contain errors)
G. W. A FITZ GEORGE 8: H. J. BROWN. APPARATUS FOR ENAMBLING PAPER.
Patented Jan. 18, 1898.
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UNITED STATES PATENT Orrrcn,
GEORGE W. A. FITZ GEORGE, OF LONDON, AND HAWTHORN J. BROWN,
OF SOUTH DARENTH, ENGLAND.
APPARATUS FOR ENAMELING PAPER.
SPECIFICATION forming part of Letters Patent No. 597,405, dated January 18, 1898.
Application filed June 15, 1896. Serial No 695,660. (No model.) Patented in England October 16,1895,No. 19,471; in Germany June 7,1896, No;92,166;in France June 22,1896, No. 257,457; in Belgium June 22, 1896, No. 122,079; in Norway October 12,1896,ll0, 5,468, andin Austria March 30, 1897, No. 47/l,088.
T0 a-ZZ whom it may concern.-
Be it known that we, GEORGE l'VILLIAM ADOLPHUS Frrz GEORGE, of 37 Queen Victoria Street, London, and HAWTHORN Janus BROWN, of South Darenth, Kent county, Eng land, subjects of the Queen of Great Britain and Ireland, have invented certain new and useful Improvementsin Apparatus for Enamcling Paper, of which the following is aspecification.
The invention has been patented in Great Britain, No. 19371, dated October 16, 1895; in Germany, No. 92,166, dated June 7, 1896; in France, No. 257,457, dated June 22, 1896; in Belgium, No.122,()79, dated June 22, 1896; in Norway, No. 5,466, dated October 12, 1896; and in Austria, No. 47/1,088, dated March 30, 1897.
0 ur invention relates to the manufacture of coated or enameled paper suitable for artistic printing; and it consists in a process whereby paper can be evenly and very efficiently coated or enameled on both sides simultaneously with the making of the paper, thus obviating the separate and costly process of coating or enameling the paper after it is made, as hitherto practiced.
By our invention we overcome a difficulty I which, so far as we know, has heretofore always proved insuperableviz., the even ap plication to and distribution upon the web while in a more or less damp state of the coat in g solution, which is necessarily of high specific gravity or density, thick consistency, and sticky nature, for which reasons it requires special appliances to insure its efficient and even application to and without injuring the web.
According to our invention a tank containing coating solution of suitable density is placed about the middle of the group of drying-cylinders of the ordinary paper-making machine. lVlien the continuous Web reaches this point, it is intercepted on the dryingcylinders, which are equipped with the usual drying-felts, and passed through the coating solution contained in a tank; thence it passes upwardly between a pair of specially-con structe'd radial motion-adjustable scrapers,
hereinafter termed adjusters, for surface leveling and taking oif the superfluous coating; nextbetween a pair of felt covered squeezing-rolls; then, if necessary, over opensparred drying-drums to the remaining ordinary drying-cylinders and along the machine in the ordinary course. Thus the finished product is a paper evenly enameled on both sides and of unimpaired strength;
The annexed drawing represents in side elevation the middle part of the group of dryin g-c-ylinders of a papermaking machine havin g our invention applied thereto. The drying-cylinders of the machine are spaced apart, preferably about the mid-len gth of the group, so as to have about an equal number at either side of a gap sufficiently long to admit of the introduction of our apparatus.
1) represents the last drying-cylinder of one part of the set, and D the first of the other part of the set, all being mounted in the usual manner on the frame F.
T is the tank containing the coating solution fixed to the machine-frame F, through which solution the continuous web of paper W is passed from 1) to D over and under suit-able leading-rolls, such as L L. The solution may be of any usual or preferred COlllposition-such as blanc fine, china-clay, calcium sulfate, or mixtures thereof with appropriatefiXing-and its specific gravity may vary between 1.100 and 1.250 (or 20 to 50 Twaddells hydrometer,) according to circumstances. The specific gravity of any cnameling solution is, however, much higher than that of the solutions used in the known processes of tub'sizing, hard sizing, and the like, and hence great care is essential in using same. Afterhavin g been thus passed through the coating solution in the tank '1 and being completely and thickly covered therewith the Web passes first between a pair of adjusters A A-one above and the other below the coated web. T hose scrapers extend transversely across the full width of the web, and their axes are pivoted to bearings a a on the tank T, so as to afford a radial movement,