US1624184A - Mottling device for paper making - Google Patents

Description

H. M. ROSS MOTTLING DEVICE FOR PAPER MAKING April 12 1927. 1,624,184

Filed Oct. 26. 1925 A TTORN E Y5,

- a a 11333-1 12, R322? STATES fi i al 'hATENT easiest HARRY IVI. ROSS, OF INDIANAIOLIS, INDIANA, ASSIGNOROF ONE-HALF TO BEVEBIDGE PAPER COMPANY, OF I INDIANABOLIS, ILTDIANA, A CORPORATION.

MOTTLING DEVICE FOR PAPER MAKING.

Application filed October 28, 1925. Serial No. 64,885.

This invention relates to a device or mechanism for use in connection with the usual paper making machine whereby the paper made thereon will have a mottled coloration for decorative purposes. This type of decorated paper stock is particularly applicable to use in calendars, posters, fancy boxes and the like.

The object of the invention lies in the provision of a vessel in which a colored paper pulp in solution is contained, such vessels being positioned immediately over or n the vat containing the regular pulp used 1n the making of the aper, and adjacent one of the screen cylinders upon which the film of paper pulp is formed in a sheet. By means of a suitable agitating roller. paddles and the like, revolved within the vessel, the

colored pulp is splashed or tossed from the vessel onto the film or sheet formed on the cylinder so as to be lightly spread thereover and become intimately associated therewith.

By means of this arrangement, the colored fibres or particles of pulp forma part of the body of the stock and in passing between the rolls become pressed into the main body of the stock so that the coloring is spread or absorbed in such a way as to give the desired mottled effect upon the stock having passed through the paper making machine. Thus the paper is mottled or decorated during the making thereof rather than afterwards, eliminating the usual printing thereof. while at the same time it is formed as a part of the stock rather than being merely applied to, the surface of the finished paper.

The full nature of the invention will be understood from the accompanying drawings and the following description and claims:

Fig. 1 is a diagrammatical illustration of a portion of a paper making machine showing the position of the mottling device mounted therein. Fig. 2 is a plan view of the mottling device. Fig. 3 is an end elevation thereof taken on the line 33 of Fig. 2. Fig. 4 is a section taken on the line 4-4 of Fig. 2.

In the drawings there is shown diagrammatically a-portion of a paper making ma- 1 chine of the usual character having a vat for receiving the pulp in solution from which the paper stock is formed. Mounted in the vat there is a rotating screen cylinder the vat, the stock tends to flow through the wire and the fibres being unable to pass are caught in a web thereon. The Water that passes through the wire is drained off from the end of the'cylinder in the usual manner. The difference in level between the water and the cylinder and the stock in the vat provides a suction that keeps forming a film on the wire as the cylinder rotates. Thus a film of the natural stock contained in the vat of a pasty consistency is formed on the top surface of the cylinder and compressed thereagainst by the couch roll 12 carrying the usual felt band 13 moving in the same direction and at t-he same speed. The pulp adhering to the hand 13 is carried thereby to a second and additional screen cylinder 14 which operates in the same manner;

Mounted over the vat 10 so as to extend from one side to the other, and in close relation to the cylinder 11 thereis a vessel 15 in the form of a trough having inlets 16 at each end and an outlet 16. Rotatably mounted in the vessel 15 and extending longitudinally thereof there is an agitating roller 17 having a plurality of ribs 18-proiecting radially therefrom and extending the full length thereof. formed of solid wood or in any other suitable manner and is provided with a shaft 19 extending from .each end thereof and mounted in suitable bearings or slots 20 formed in each end of the vessel. On one end of the shaft 19. and exteriorly of the vessel there is provided a pulley 21 adapted to be driven from any suitable source of necting anv driving mechanism with the Said roller may be shaft 23. Said roller 22 which may likewise be formed of wood or any other suit-able material is provided witha plurality of radially projecting pins or fingers 25. The entire surface is'provided with said pins which may extend substantially an inch from the surface thereof and are closely positioned toting roll 17; the colored pulp is maintoss themonto the moving film of natural tained in proper solution and in proper dis.

tribution through-the vessel while the projecting fingers on the roller 22 will engage the particles of fibre of the colored pulp and stock as it passes over the cylinder 11. This has the effe'ct' of sprinkling isolatedparticlei of colored pulp over the surface of the stock so that as the stockpasses through the machine the colored pulp will be embedded in the natural pulp and form a part oi the stock, the pressure on such colored stock causing the same to spread and the color thereof to blend with the natural color.

so that the stock u on emerging fromthe paper making mac ine will have the desired mottled efi'ect.

'In some instances it might be desirable to discharge the colored pulp upon the reverse side of the stock and to that end a second.

vessel 115 may be mounted between the cylinders 11 and l lwi th or without an agitating roller 17 whereby the projections on the roller 122 will cause the colored ulp to be discharged or tossed onto the on or side of the film of pulp 26 as it is carried underneath the belt 13 over the roller 14, The use of a second such device may depend largely upon the depth oicolor desired or on the thickness or number of plies of the stock to be mottled. v

The invention claimed is:

1. The combination with a paper making machine having a vat containing a solution of paper pulp, and a rotating screen cylinder, of means for applying a mottled color to the paper as it 18 formed and passed through said machine comprisinga vessel containinga colored solution, an agitating roller mounted in said vessel for maintaining the distribution of said solution, and a rotatable roller having a plurality of projections about the surface thereof ada ted to engage and throw the particles of sai solution. from the vessel onto the film of pulp carried by said cylinder,

2. The combination with a paper making machine having a vat containing a solution of paper pulp, and a rotating screen cylinder, means for applying a mottled color to the paper as it isiormed and passed through said machine comprising a vessel in the form of a trough extending across said vat and mounted therco ver, said trough-like vessel being positioned adjacent said cylinder, an agitating roller mounted in'said trough-like vessel for agitating and distributing a colored solution contained therein, and a rotatable roller mounted therein adjacent said agitating roller having a plurality of radially extending fingers closely associated over the entire surface thereof, said fingers being adaptedto engage particles of the so-- lution'during the rotation of said roller and tling them from the vessel onto the film of pulp'passing about said cylinder substantially as and for the purpose described.

3. A device of the character described comprisin a vessel containing a colored so-. lution, said vessel having an inlet and an outlet communicating therewith through which the solution may pass, a cylindricalrollerrotatably mounted in said vessel adjacent one side thereof, and a plurality of pro'ections extending radially from said cylin rical roller in position to engage particles of the solution contained in said vessel and throw them therefiom.

4. A device of the character described including a longitudinally extending vessel in the form of a. trough being entirely onclosed excepting tor a slotted opening along one side thereof, an outlet connected therewith for permitting a colored solution to passdherethrbugh, ,an agitating roller 'rotatably mounted in said vessel and having a plurality of longitudinally extending ribs adapted'to rotate in} the solution tor agitatin and distributing the same, a cylindrical r0 ler rotatably mounted therein adjacent the open side, means for rotating both of said rollers, and a plurality of radially extending projections mounted about the entire surface of said cylindrical roller for engaging and flinging the particles of solution from said vessel substantially as and for the;

purpose described.

In witness whereof, I have hereunto affixed my signature.

' HARRY ROSS.

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