US1008228A - Method of making paper. - Google Patents

Description

P. WESTON. METHOD OF MAKING PAPER. APPLICATION FILED JULY 26, 1911.

1,008,228,. Patenfbd Novf'F, 1911.

2 SHEETS-SHEET 1.

P. WESTON. v METHOD OF MAKING PAPER. APPLICATION rILBI 111L126, 1911.

I 2 SHEETS-SHEET 2.

' I ubzwtoz W MW Patented N0v.7, 1911.

rmmr wns'roiv, or DALTON, MASSACHUSETTS.

METHOD OF MAKING PAPER,

Specification of Letters Patent.

Patented Nov. 7, 1911;

To all whom it may concern:

Be it known that I, PHILIP WESTON, a citizen of the United States, residing at.- Dalton, in the county of Berkshire state of Massachusetts, have invented certain new and useful Improvements in Methods of Making Paper, of which the following is a description, reference being had to the accompanying drawing and to the letters and figures of reference marked thereon.

It is desirable in books employing relatively thick writing paper, such, for in: stance, as ledgers, and whether said books have permanent leaves or detachable ones, that the leaf be made thinner adjacent its binding line or end, in order that it may be more readil and easily turned in the open- 7 ing of the book, may lie more flatly when open, and may take less space or thickness at the bend; and the present invention consists in a method of decreasing the thickness of a web of paper during its manufacture, from the pulp, and in the paper-makin ma-" chine, whereby'the Web may have pro need in it during such manufacture one or more sections, which shall be thinner than the main parts of the web, and which thin sections shall be so arranged in the Web as -to permit the web to be subsequently cut into leaves, which shall have such end sections adjacent to the binding edges or portions thereof.

The present invention has been designed particularly for use in the manufacture of paper to be made up into so called loose leaf ledger sheets, although it will be understood that it may not be so restricted. Therefore, the particular finished article which *I illustrate herein is a loose leaf 'ledger sheet, having the marginal edge and body portion joined by a thin portion, so that the leaf will lie flatin the book.

Before fully describing my invention, it may be desirable to make brief mention of the prior art on this general subject. I-

The operation of making decide-edged paper is old and wellknown, and need not, be further referred to. It is also old to score or make a narrow groove in paper by the use of a specially constructed dandy roll, So far, however, as methods of nan- -ufacturin paper to be made up into independent sheets with the thin edges, for-bindmg, are concerned, the only method m -use so far as I am aware, isthat ofskiving or Application fi1ed-Iuly26, 1911. seal No. (540,716.

grinding down a portion ofthe sheet in its finished state. It. has also been proposed, but so far as I amaware, themethod is not in use,) .toplace in juxtaposition to the Fourdrinier or other paper machine, a roll or series of rolls which displace and compress the portions of the material brought into contact therewith, thus producing a channel or a series of channels in the web, the bottoms of which'are thinner than the adjoining portions. Moisture is then ex tracted from the thinportions, preferably by suction, -and the thicker portions are treated and finished in .the usual manner. In others-words, thatmethod may be said to consist in subjecting the pulpy mass to the action ofrotary members by which certain portions aredisplaced andcompressed, and removing more ofthemoisture in proportion fromthe displaced andrcompressed por tions than'from the portions adjoining. A

modificationof this'latter methodhas also been proposed,iviz., the heatingof the com-- pressing rolls for the purpose, of removing the moisture; '-Whi le,as I have heretofore said, these methods have bee'nproposed and patents granted thereon, .so far as I .am aware, theyhave not been put into use;

A well definedchannel caused b compression of the material, is objectiona le, in that it leaves ,a shoulder where the channeled portion is joined ontothe body or higher portion, and; furthermore, as :the pulp in the channel is compressed. only and not removed, it does not leave the thin portion as-flexible as is desirable.

Myinvention consists'broadly in a method of producing paperof the'charact'er men- 1 tioned by treating the web while in a pulpy state on the Fourdrinier or cylinder, with air pressure, either suction-or blast, whereby in the former a-portion ofthe'web in a defined line is sucked away, and in the latter a portion is blown. away, or ov.er onto the ad acent portions of; the web,.thus removing a a portion of the web and leaving a thinned strip or strips. I In a more ,rest rictedsense, the invention consists in the removal of'a portion'of the' thickness of the web, alongv certain defined lines by suction applied to such linesof the web, and finally, 1n the matters hereinafter described and referred to in the appended claimss- The invention is illustrated in the accomsuction nozzles.

boxes,

Fourdrinier wire 1, arranged to travel in Copies of this patent may be obtained for panying drawings, which are more or less diagrammatic, and in which-- Figure 1 is a side view of a mechanism, adapted for the carrying out of my method on a Fourdrinier machine; Fig. 2 is a plan view of the same; Fig. 3 is a view similar to Fig. 1, showin the method as applied to a cylinder machine; Fig. 4 is a view; similar to Fig. 2, showing theruse of an'air blast instead ofsuction,"]1ig. 4 is a detailed sec: tion of Fig. 4; Fig; 5 isa view similar 'to Fig. 1, in which the suction nozzles are arranged over the first'suction box; and Fig. 6 is a view of'a lo'ose leaf ledger sheet made in accordance with my invention.

Before referring specifically to the drawings, it may be stated that the paper material while in a plastic condition on the movmg Wire of an ordinary Fourdrinier papermaking machine, or .while on the cylinder of anordlnary cylinder machine, is passed beneath the end orends of 'a tube or tubes or a nozzle or nozzles, which, under thesucking .ion of a centrifugal pump or similar apparatus suck away or remove a portion 0 the material in operative juxtaposition to the tube or nozzle, leaving that portion of the weothinner than the body part outside the sphere of action. of the suction nozzles.

The web is then fed over a suction box and treatedin the usual manner, and if desired the web may be passed over a suction box before coming under the influence of the Instead of suction nozzles or tubes. being used, air pressure or air blast nozzles may be used, in which event a portion of the webadjacent thereto would be blown away to one side or the other, leaving the above mentioned thin portion.

It will'be understood that the nozzles may i be arranged as shown in Fig. 1, that is, ahead of the first suction box; but it will also be understood that the may be arranged in a plane between the. rst and second suction or as shown in Fig. 5, maybe arranged over the first suction box, in which event the suction of the nozzles would have to be regulated to accord with the suction of the box, the latter acting to draw out the water and draw the pulp against the wire, wlllilile the former acts to remove some of the P P- Mechanism for carrying-out the method as shown'in Figs: 1 and 2 consists of the five cents each, by addressing Washington, D. G."

the direction .indicated by the arrows. A suction pipe 2, with the nozzles 3, leads to a point. in operative proximity to the surface of the web, so that when the suction is prop erly regulated by the valves 4, a portion of the web will be removed by the action of the centrifugal pump 5, in connection with the pipe 2, drawn through the pump and discharged into the stuff chest 6.

In Fig. 3, the mechanism used in carrying out the method on a cylinder paper-making machine is illustrated, a cylinder 1 being used instead of the Fourdrinier wire shown in the other figures.

method for removing a portion ofthe'web by the use of air, but instead of air suction being used, air pressure is utilized." Air-is forced through the nozzles 3 onto the web, and a portion of the web surface in proxim-. ity thereto is blown to one side or the other, thus leaving the thinned portion of the web, the latter being tb reafteroperated upon in the usual way.

made according to my method, in which the body and marginal binding edge a. and b respectively are of the same'thickness, the thinned portion a being formed by the removal of material, according to my method.

I do not wish to be limited to the exact manner shown, of applying the suction or the air blast, as changes may be made without departing from the spirit of ,my mvention. I

Having thus described my mventlon, what I claim as new and desire to secure by Letters Patent, is r 1. The method herein described, of manufacturing paper having a thinned portlon, which consists in removing tr'omthe web at the portion to be thinned, some of the material by thereto.

2. The method herein described, of manufacturing paper having a thinned portlon, which consists in removing from the web at the portion to be thinned, some of the mate-- rial bythe application of suction thereto.

In testimony whereof I aflix my signature, in presence of two witnesses PHILIP wlas'ron'.

: lVitnesses:

A. M. PARKING,

C. L. STURTEVANT.

" i: i=. the 'Commissioner 0! Patents,

30 f l In Fig. 6 is illustrated a form of leaf

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