US2691225A - Web treating apparatus - Google Patents

Description

1954 c. KAMPRATH 2,691,225

WEB TREATING APPARATUS Filed Jan. 25, 1952 2 SheetsSheet 1 I6 I I6 Hun U11 Mm. N. u

.r .11? r 3 I 201E200. 200% I mm" 2Q In 2e 20 u as No. 25 250k a.

ATTORNEYS Oct. 12, 1954 c, KAMPRATH WEB TREATING APPARATUS Filed Jan. 25, 1952 2 Sheets-Sheet 2 illn- "HI-- ATTORNEYS Patented Oct. 12, 1954 WEB TREATING APPARATUS Conrad Kamprath, West Orange, N. J. Application January 25, 1952, Serial No. 268,232

This invention relates to web treating apparatus and has for an object to provide such a device which assures even treating throughout the width of the web.

Another object is to provide means for removing damp air or other drying or treating gas from the apparatus.

Another object is to provide such an apparatus for drying or otherwise treating webs of paper, cloth, or other material, on either one or both sides, so that solutions applied to either one surface or both surfaces may be treated separately or simultaneously as the web moves through the apparatus.

In certain operations the coating solutions contain toxic or inflammable substances it is an object to provide for exhausting the fumes and vapors thereof while the Web is passing through the apparatus.

To that end it is an object of the invention to provide such an apparatus including two tubes or sets of tubes on one or both sides of the traveling web. One of said tubes or sets of tubes is perforated and has air or other treating gas supplied thereto under pressure causing said air or other gas to be expelled through said perforations and against the web for drying or otherwise treating the web material, the other tube or sets oftubes being provided with one or more perforations and subjected to exhaust apparatus to draw away from the web the gases and/r vapors, removing them from the apparatus.

It is another object of the invention to provide such an apparatus in which at least one manifold is provided to supply gas to said gas supply tubes and at least one manifold to withdraw gas from said gas exhaust tubes, one of said manifolds being of generally C-shaped cross-section and the other manifold lying between the upper and lower walls of said C-shaped manifold.

Another object of the invention is to provide an apparatus capable of applying treating gases, such as heated air, to a moving web of material under closely controlled conditions and to provide means for removing the treating gases from the vicinity of the web and outside of the treating chamber whereby an accurate control of the application of the treating gases to the traveling web may be maintained.

These and other objects will become" apparent Claims. (Cl. 34156) 2 from the following description of an illustrative embodiment of the invention taken together with the attached drawings wherein:

Fig. 1 is a plan view of such an apparatus;

Fig. 2 is a partial longitudinal cross-section taken along the line 2-2 of Fig. 1;

Fig. 3 is an end elevation;

Fig. 4 is a cross-section taken along the line 4-4 of Fig. 2; and

Fig. 5 is a cross-section taken along the line 55 of Fig. 2.

Said drawings show a treating cabinet consisting of a bottom H bolted to angle irons Ha. and

a top which preferably consists of a number of 1 plates l2 shown bolted to angle irons I20. attached to the side plates I3. Also attached to the side walls It are channel members 15, one on each side, forming together with the side walls pressure conduit or manifold spaces I511; Said manifolds run substantially the entire length of the apparatus. Surrounding said channel members I5 is a second channel-shaped member I6 wall [3 form ex- (Fig. 1) and passes out through slot l8 (Fig. 2) v and over roller 9 to the next machine.

Air or other treating gas is fed'into the manifolds l5a as indicated by the arrows 15b in Fig. 1. Connecting the manifolds 15a and communicat ing therewith are one or more tubes 20 (Figs. 2 and 4) provided with one or more perforations or slots 200, preferably close to the web W.

It will be seen that the treating gas which is supplied under suitable pressure to the manifolds l5a will pass into tubes 20 and will be ejected therefrom through slots 20a, onto or under the' web W. The treating gases, after they have served their purpose are withdrawn from the vicinity of the web through one or more slots 23a in exhaust tubes 23 (Figs. 2 and 5). The ends of said tubes 23 are connected to the manifolds Ilia which are connected to a suitable gas exhauster connected with the vertical stacks 24 (Figs. 1,

2, and 4).

It will be noted'that the manifolds 15a are of Assuming that generally rectangular cross-section and that the manifolds I6a are of C shape cross-section so that the manifolds {5a lie within and partly fill the open part of the G shape cross-section of the manifolds Ilia. In this way, the respective manifolds Mia and I6! may have the common walls l3 and I5 and together constitute a rectangular beam. By locating the tubes 20 near the web they communicate directly with pressure manifolds 5a and by locating tubes 23 further away from the web they communicate with the exhaust manifolds I'Ba. This provides a simple low-cost but a very effective and strong construction. It is, of course, to be understood that the conduit [50 may be extended outwardly to the same extent as the outer wall of the conduit [6a, in which case an upper and a lower exhaust conduit would be produced.

It will be understood that the pressure applied to the manifolds I50, the vacuum applied to the manifolds I60, the width of the slots 20a and 23a, and the length thereof, can be so chosen or adjusted as to apply exactly the proper amount of treating gas to the traveling web and by the means shown exactly the desired amount of treatment may be accorded the various portions of the web from edge to edge. The treating gas may be heated dry air for drying the web or any other gas for applying a chemical treatment to the material of the web or coating material thereon.

Any number of gas supply and gas removal tubes may be employed, depending upon the treatment required, and the length of the apparatus will be chosen in accordance with the number of tubes required.

The web W may be caused to float due to the pressure of the gas supply emerging from nozzles 20a of the lower pressure tubes 20, or, if preferred, intermediate rollers 26 may be provided at various points along the web. Such rollers are particularly needed when the lower tubes 20 and 23 are not in use, as when treating only the upper surface of the web.

It will be noted that the construction shown and described will serve admirably to accomplish the objects stated above. It is to be understood, however, that the construction disclosed above is intended merely as illustrative of the invention and not as limiting as various modifications therein may be made without departing from the invention as defined by a proper interpretation of the claims which follow.

I-claim:

1. Apparatus for the gaseous treatment of a moving web of material comprising a housing through which the web is adapted to pass, a plurality of gas supply tubes extending transversely to the web and substantially parallel therewith and each having at least one perforation through which gas supplied to said tube under pressure may be applied to said moving web, a gas supply manifold extending longitudinally of the apparatus and generally parallel to the web and connected to one end of each of said gas supply tubes, a plurality of gas exhaust tubes extending transversely to the weband substantially parallel therewith and each having at least one perforation through which gas applied to said web from said first-mentioned tube may be withdrawn, and a gas exhaust manifold extending generally parallel to the web and to said gas supply manifold manifold lying between the upper and lower walls of said C-shaped manifold.

2. Apparatus for the gaseous treatment of a moving web of material comprising a housing through which the web is adapted to pass, a plurality of gas supply tubes extending transversely to the web and substantially parallel therewith and each having at least one perforation through which gas supplied to said tube under pressure may be applied to said moving web, a gas supply manifold extending longitudinally of the apparatus and generally parallel to the web and connected to one end of each of said gas supply tubes, a plurality of gas exhaust tubes extending transversely to the web and substantially parallel therewith and each having at least one perforation through which gas applied to said web from said first-mentioned tube may be withdrawn, and a gas exhaust manifold extending generally parallel to the web and to said gas supply manifold and connected to one end of each of said gas exhaust tubes, said gas exhaust manifold being of generally c-shaped cross-section and the gas supply manifold lying between the upper and lower walls of said gas C-shaped gas exhaust manifold.

3. Apparatus for the gaseous treatment of a moving web of material comprising a housing through which the web is adapted to pass, a plurality of gas supply tubes extending transversely to the web and substantially parallel therewith and each having at least one perforation through which gas supplied to said tube under pressure may be applied to said moving web, a gas supply manifold extending longitudinally of the apparatus and generally parallel to the web and connected to one end of each of said gas supply tubes, a plurality of gas exhaust tubes extending transversely to the web and substantially parallel therewith and each having at least one perforation through which gas applied to said web from said first-mentioned tube may be withdrawn, and a gas exhaust manifold extending generally parallel to the web and to said gas supply manifold and connected to one end of each of said gas exhaust tubes, said manifolds being of such crosssection that they are complementary to each other and one is nested within the other.

4. Apparatus for the gaseous treatment of a moving web of material comprising a housing through which the web is adapted to pass, a plurality of gas supply tubes extending transversely to the web and substantially parallel therewith and each having at least one perforation through which gas supplied to said tube under pressure may be applied to said moving web, two gas supply manifolds extending longitudinally of the apparatus and generally parallel to the web and each connected to one end of each of said gas supply tubes, a plurality of gas exhaust tubes extending transversely to the web and connected to one end of each of said gas exhaust tubes, one of said manifolds being of generally c-shaped cross-section and the other and substantially parallel therewith and each having at least one perforation through which gas applied to said web from said first-mentioned tube may be withdrawn, and two gas exhaust manifolds extending generally parallel to the web and to said gas supply manifold and each connected to one end of each of said gas exhaust tubes, said two manifolds being connected to one of said sets of tubes are of generally C-shaped cross-section and said other two manifolds lie,

respectively, between the upper and lower walls of the said C-shaped manifolds.

5. Apparatus for the gaseous treatment of a moving web of material comprising a housing 5 through which the web is adapted to pass, a plurality of gas supply tubes extending transversely to the web and substantially parallel therewith and each having at least one perforation through which gas supplied to said tube under pressure may be applied to said moving web, two gas supply manifolds extending longitudinally of the apparatus and generally parallel to the web and each connected to one end of each of said gas supply tubes, a plurality of gas exhaust tubes extending tranversely to the web and substantially parallel therewith and each having at least one perforation through which gas applied to said web from said first-mentioned tube may be withdrawn, and two gas exhaust manifolds extending generally parallel to the web and to said 6 gas supply manifold and each connected to one end of each of said gas exhaust tubes, said two gas exhaust manifolds being of generally C-shaped cross-section and the two gas supply manifolds lie, respectively, between the upper and lower walls of said C-shaped conduits.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,970,180 Milne Aug. 14, 1934 2,022,593 Fuykers Nov. 26, 1935 2,144,919 Gautreau Jan. 24, 1939 2,499,572 Dunakin Mar. 7, 1950

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