US780670A - Method of and apparatus for applying solutions or fluids to travelling webs. - Google Patents

Description

I No. 780,670

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J @Mv l l -R.KRON. i O METHOD OP ANO APPARATUSOFOR APPLYING SOLUTIONS OR FLUIDS TO TRAVBLINO WEBS.v

APPLICATION FILED AUG. 12, 1904.

PATENTBO JAN, 24, 1905. y

HEETS-BHBET 1.

I PATENTED JAN. 24, 1905. R. KRON. v

SHEETS-SHEET z.

T0 TRAVELING WEBS. APPLIOATION TILBD `um. 12,1904.

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' METHOD OT AND APPARATUS TOR APPLYTNG SOLUTIONS OR PLOIDS UNITED STATES atented January 24, ll 905.

PATENT OFFICE RUDOLF KRON, OF GOLVZERN, GERMANY.

METHOD 0F AND APPARATUS FORLAPPLYING SOLUTIONS 0H FLUlDS-TO TRAVELING WEBS.

SPECIFICATION forming part of Letters Patent No. 780,670, dated January 24, 1905.

i Application filed August l2. 1904. Serial No.'220,465.

To all whom it' Montgeon/cern:

Be it known that I, RUDOLF KRON, acitizen of the Republic of Switzerland, and a resident of Golzern, Kingdom of Saxony,German Empire, have invented anew and useful Method of and Apparatus for Applying Solutions or Fluids to Traveling Webs, of which the following is a specification.

Various methods are at present employed in the manufacture of compound or multiple papers or boards for successively running the same or diii'erent stuff? solutions or pulps upon a continuously-traveling web; but the feed-regulatorsand distributing devices hitherto employed for this purpose work so im-r perfectly that while they permit of making coarse duplex papers and boards finer layers or coats, especially of less easily distributed solutions or iuids, can either not be applied with them at all or at best only very unevenly.

The present invention consists of an improved method and apparatus for uniformly iiowing and distributing Celluloid, casein, glue, earths, color, rubber,and like solutions or fluids upon paper, woven materials, and the likefor example, for the immediate production of chromo-paper and sized or coated cardboard on the paper-making machine.

This process consists as follows:

1. First of all the solution flowing trans- Versely onto the web is permitted to distribute itself evenly and regularly the entire' width of the web and to compose itself upon a broad surface before it is poured onto the continuously-traveling web to vbe coated on one side.

2. vA slowly-increasing longitudinal iiow is imparted to the properly-distributed solution, which at the outlet or flowing point attains exactly the speed of the continuously-traveling web to be coated on one side.

3. The thickness or depth of the outiiowing stream can be varied as desired at any point.

4. Any foam or air-bubbles produced are at once removed in the known way by a spray or rain of atomized water.

For carrying this process into practical effect I have devised arrangements for effecting the feed or supply of the ifuid, for distributing it, and for iiowing it upon the web or thelike, which arrangements are illustrated in the accompanying drawings.

Figure 1 shows this apparatus in cross-sec tion, andFig. 2 is a plan, while Figs. 3, 4,5, and 6 are views of various details.

At the head of the apparatus is disposed a trough a, divided into twov compartments. The iiuid to be distributed is supplied to the firstof these compartments at both sides from above o r below or from the transverse side. In Figs. 1, 2, and 3 the iiuid is admitted to the iirst compartment from below by the supply-pipe m, a reciprocating or rotary stirrer r being arranged in this compartment. From the rst compartment the liquid passes into the second compartment through a number of sluice-like openings disposed close together and adapted to be closed or throttled by adjustable slides or valves c. The second compartment terminates in an overflow or lip d. To the overflow Z is connected a wide fiat distributing-box s,with an elasticor resilient bottom, this box being suspended from two angle bars or rails e. At the bottom of the box s are an umber of obstructions f, serving to compose the liquid. The last of these obstructions is formed as a Weir-like overiiow or lip in such manner that the liquid can flow out without shock onto the web to be coated on one side, which travels continuously under this lip close under the box in the direction of the arrow OD.

By means of the suspending-screws g the elastic bottom of the box s can be set up or down in such manner that the liquid is distributed evenly and regularly over the Whole width. Further, the whole box s can be given more or less inclination or fall by means of the ladjusting-screws L, so that the fluid reaches the point of delivery or outiiow at the proper speed. As further means of regulating the outflow over the entire width doctors or strickles z' are provided at desired points, these consisting of a strong'or resisting body in which are fitted metal tongues n. These metal tongues can, as seen from the left in Fig. 4i and in longitudinal and cross-section, Figs. 5 and 6, be put in tension by adjusting-screws o, disposed close to each other in such man- IOO ner as to impart a flat,'concave, convex, or undulated form to the bottom edge of the doctor-blades. By these adjustments the solution is fed to the outow or flowing point at a gradually-increasing speed, attaining at the outflow a speed corresponding with the speed of the web. To enable the metal tongues to bend in the manner mentioned, it is necessary to provide them with notches, slots, or gaps at the top.

In order to disperse foam and air-bubbles, a fine spray or mist is produced in the known way abovethe trough ct and the box s. In the present case this is effected 'by allowing the fine jets of one or more spraying-pipes to strike against plates z5, arranged above said jets, whereby the jets are atomized and fall back as a fine mist or rain, which causes any foam or air-bubbles produced in the fluid to burst.

It may be preferable to produce a transverse shaking or vibrating motion of the suspended distributing-box@ s. For this purpose one of the adjusting-screws 7a may be provided at its lower end with a roller w, as shown at the right-hand side of Fig. 4. The pin of a crankdisk a is connected by a connecting-rod o with the pin or trunnion of the roller w, so that on rotating the crank-disk 'it a to-and-fro movement is given to the distributing-box p The roller w is supported on the stationary surface m, whereas the adjusting screw or screws /t on the left-hand side of the distributing-box move on the stationary surface or plate A similar means for producing the transverse shaking of the distributing-box may be applied in connection with the adjusting-screw on the other side of the box.

The operation of the apparatus is apparent from the above description. It only needs to be added that one and the same distributing arrangement can be arranged or adapted for varying widths of web, so that the outflow of the fluid will take place over a portion of the width of the traveling web or in separate or distinct strips or parts of the wid th. For this purpose it suflices to throttle or reduce the width of the outflow by means of two horizontally-adjustable slides Z, or the side parts or members p can be made adjustable in width or breadthwise. By disposing a number of the described distributing apparatus one behind the other or side by side different solutions or fluids can be flowed or applied side by side or behind or upon each other.

What I claim is*- l. Method for uniformly flowing or applying solutions or fiuids upon a continuouslytraveling web or surface to be coated with same on one side, characterized in that the solutions or fluids are fed to the outflow or "flowing point with a gradually-increasilxg speed, attaining at the outlet to the speed of the web or surface to be coated, the thickness or depth ofthe outliowing stream being varied as desired at any point of the outflow of liquid, while any foam or air-bubbles produced are dispersed by a spray falling upon the stream of the liquid, substantially as described and specified.

2. In an apparatus for carrying ont the method for uniformly flowing or applying solutions or fluids on a continuously-traveling web or surface, the combination with a supplytrough divided into two compartments which communicate with each other by a number of openings provided with slides or valves and the second of which compartments is provided with an overflow, of a suspended distributingbOX having an elastic bottom which is previded with obstructions and adjusting-screws for regulating the flow of material, doctors or strickles with adjustable resilient blades for the uniform distribution of the material, and spraying-pipes for obviating the formation of foam and air-bubbles, substantially as described and specified.

3. In an apparatus for effecting the iiow of fluids on a contin'uously-traveling web or surface, the combination with a supply-trough and a suspended distribution-box having an elastic bottom, of a crank-disk, a connectingrod, a roller provided at the lower end of the adjusting-screw and a supporting-plate at the side of the distributing-box for producing a shaking or vibrating motion of the distributing-box, substantially as described and specified.

In testimony that I claim the foregoing as my invention l have signed my name, in preslence of two witnesses, this 30th day of July,

RUDOLF KHON. Witnesses:

O'r'ro H. KNoor, GEORG HnUssINeER.

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