US2012403A

US2012403A - Method and apparatus for producing wooden wall coverings

Info

Publication number: US2012403A
Application number: US541728A
Authority: US
Inventors: Relmann Otto
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-06-02
Filing date: 1931-06-02
Publication date: 1935-08-27
Anticipated expiration: 1952-08-27

Description

Aug. 27, 1935. o. REIMANN METHOD AND APPARATUS FOR PRODUCING WOODEN WALL COVERINGS Filed June 2, 1951 SSheets-Sheet 1 III 1/! I III/III Allg- 1935. o. REIMANN 2,Ii2,403

METHOD AND APPARATUS FOR PRODUCING WOODEN WALL COVERINGS Filed June 2, 1931 3 Sheets-Sheet 2 I I ----------i:-u

- nveuf'o t, 04 60 Rea m awn ,Aug. 27, 1935. o. REIMANN 2,012,403

METHOD AND APPARATUS FOR PRODUCING WOODEN WALL COVERINGS Filed June 2, 1931 3 Sheets-Sheet 3 I 3110011? fi'o Rmmamt Patented Aug. 27, 1935 PATENT OFFICE METHOD AND APPARATUS FOR PRODUCING WOODEN WALL COVERINGS Otto Reimann, Berlin-Charlottenburg, Germany Application June 2, 1931, Serial No. 541,728

8 Claims.

In the known methods of and apparatus for producing wooden wall coverings or veneers the 4 device supplying the adhesive is arranged in the 'quality of the product derived.

The subject matter of this invention is a method of producing wooden wall coverings or facings, in which the backing, after the applica-. tion of the adhesive, is guided freely for a certain distance conforming with the nature of the adhesive employed, then united under pressure with the veneer taken from a roller, and after the connection the two webs or sheets are warmed, dried and if necessary cooled, to then, after acquiring the moist condition necessary for further operations (10-20%), be passed through a set of rollers and wound under tension in roll form. The adhesive may be applied to the backing either in the form of glue foil or in a liquid state. The drying of the wooden wall covering is preferably performed by means of a drying cylinder, which is adjustable as regards its spacing from 'the point where the two webs are united, whereby a snug adaptation of the wooden covering to the drying cylinder is ensured by an endless, pervious cloth, screen or band exerting a counter-pressure.

An apparatus for carrying out the method according to the invention is illustrated, by way example, in the accompanying drawings.

Fig. 1 is a view showing the apparatus in elevation.

Fig. 2 is a plan view of the same apparatus.

Fig. 3 is an end view and Fig. 4 is-a front view showing the drying device and the metal cloth for pressing the wooden wall covering against the drying cylinder. I

Fig. 5 is a plan view of a woodenwall covering showing the superimposed elements thereof.

In the arrangement shown the backing, for example paper, is wound on a roller I, which is mounted in the frame 2 of a gluing device. The latter consists of a container 3, which is borne by the frame, and the bottom of which is constituted by two rollers 4, 5, the spacing between these rollers beifig adjustable as desired by means of a micrometer screw or the like for regulating the size of the gap.

After leaving the gluing device the web of paper is then conducted around a. part of the periphery of the roller 5 and over a roller 6, to be 5 thereupon united with the veneer. The frame of I the adhesive-applying apparatus rests with rollers 1 on rails '8 and is made to be movable in a well known way as by means of a screw threaded rod l8 rotatably mounted in supports I9, 20 and 10 rotatable by a hand wheel 2!, so that the distance of the adhesive-applying device from the pair of rollers 9, l0 uniting the web of paper with the veneer may be adjusted as desired. For instance, to effect adjustment of the adhesive applying device relative to the support the thread on the rod l8 may engage the teeth of a gear or worm wheel 22 rotatably carried by the frame 2 and a second gear fixed to and rotatable with' the worm wheel meshing with and ro- 20 tating toothed wheels or pinions fixed on the axles or shafts of the rollers l. The roller I0 is furnished with a rubber facing and presses against the roller 9. A preferably-bulged roller H ensures a proper spreading and an even ten- 25 sion of the web of paper or fabric coated with the adhesive.

The moist veneer is wound upon a preferably braked roller I 2 mounted in the frame, and is withdrawn from the roller under tension by the rollers 9 and i 0 and united under pressure with the web of paper. The whole, after its exit from the rollers 5 and i0, is thereupon conducted practically tangentially to a movable drying cylinder H, which is supported by means of two pairs of rollers rotatably mounted upon a carriage adjustable relative to the frame 20 carrying the uniting rollers 9, l0 and adapted to be retained in adjusted position by wedge blocks or the like, as shown in Figure 1. The wood veneer preferably covers the whole surface of the drying cylinder as indicated in dash and dot line in Figure 1. 'When employing a liquid adhesive the requisite pressure for pressing the wooden coveringand paper web against the drying cylinder is obtained by reason of the pull exerted by a set of rolls i6. I

By corresponding heating of the movable drying cylinder as by varying the number of the heating elements 24 it is possible to vary the per- 60 centage of moisture oi the wood covering as desired. The adjustability of the distance between the adhesive-applying device and the point where the web of paper is united with the veneer also permits a free guiding of the web of paper coated may be situated above the web of paper for the by means of a belt purpose of more rapidly attaining the desired tacky condition of the adhesive that must be tacky enough for preventing the moist veneer from being displaced upon the backing, when being united with the latter. Since neither the moisture of the adhesive, nor the moisture of the veneer is always uniform, the regulation of the tacky condition of the adhesive provided on the backing is very important for the riroduction of a good, smooth wooden wall covering. The

adjustment of the drying cylinder in its distance from the point of connection of the two sheets prevents excessive sag and possibly also tearing of the united layers, the thickness and weight of which may considerably vary.

After emerging from the drying device heated by gas, steam, hot air or electricity the wooden covering, which in the meantime has been dried to about 10-20% of its original moisture necessary for the additional operations, is conducted under tension through a set of rolls it, the lowermost roll of which is driven in the usual manner and a pulley mounted on the shaft of the said roll and exerts on the web the pull necessary for the passage thereof through the different devices. In the set of rolls the wall covering is furnished with a satin finish, by means of the smooth peripheral surfaces of the rolls pressed by their own weight against both surfaces of the wooden wall covering that is then wound'on a roller ll.

In the construction as shown by the drawings the drying cylinder turns on four rolls, two of which are mounted at each side of a frame containing the means for heating the drying cylinder such as by way of electric resistances M or the like. The drying cylinder however may be mounted on an axle arranged in the frame.

As an alternative to applying theadhesive in moist condition it is ,also possible to apply the same to the paper, cardboard or other backing.

in the form of glue foil, which, for instance, may be heated by any well known means and unites the backing with the moist veneer and to then pass the whole length of wall covering through the drying device and the set of rolls. To ensure the web being securely united with the veneer an endless metal cloth or screen 25, such as used in paper making machines, is guided around the drying cylinder II in any well known or conventional way, as by means of a tangentially movable tensioning roll 28 and

guide rolls

26 and 21 rotatably mounted in the frame of the driving cylinder M. The heating of the drying device may be varied as desired dependent on the degree of moisture of the veneer. For reliable operation of the apparatus it is essential that the wall covering, for such time as the veneer and the backing have not become properly united, is not subjected to bends in different directions.

The finished product, as shown in Fig. 5, consists of ,the backing 29 and the veneer 3|, which elements are united by a thin layer of adhesive 4 30. As the adhesive is sumciently tacky to properly connect the two elements, the veneer and the backing, before uniting the same upon the drying cylinder the elements will not be displaced relative to each other and no folds or creases are produced with the result that a perfectly smooth product is obtained.

I claim:

1. A method for producing wooden wall coverings and veneers consisting in supplying adhesive in an adjustable degree to a backing, regulating the tacky condition of the coating by varying the distance of the coating device from the point, where the backing is united with a veneer taken from a roll,guiding the unitedveneer and backing in contact with a substantial portion of the surface of a drying cylinder of a large diameter and pressing the united web smoothly against the cylinder, and then rewinding it in roll form by exerting on the united end of the web a pull sufiicient to unroll the webs from their supporting rolls.

2. A method for producing wooden wall coverings and veneers consisting in supplying adhesive in an adjustable degree to a backing, regulating the tacky condition of the coating by varying the distance of the coating device from the point, where the backing is united with a veneer taken from a roll and by Warming the coated backing, guiding the united veneer and backing in contact with a substantial portion of the surface of a drying cylinder of large diameter loosely and ro tatably mounted in a frame and pressing the united web smoothly against the cylinder, and then rewinding it in roll form by exerting on the united end of the web a pull sufficient to unroll the webs from their supporting rolls.

3. An apparatus for producing wooden wall coverings and veneers, comprising a device for supplying adhesive coating to a backing taken from a roll, means for varying and fixing the position of said coating device with. respect to means for uniting the backing with a veneer taken also from a roll, a drying cylinder of large diameter loosely and rotatably mounted in a movable and fixable frame, means for guiding the united material in contact with a substantial portion of the surface of the cylinder and to a set of rolls arranged to furnish the united and warmed web with a satin finish by the pressure of the smooth peripheral surfaces of the said rolls and exert on the web a sufficient pull to ensure its passage through the aforesaid devices and over the heated surface of the drying cylinder, and means for rewinding the finished web in roll form.

4. An apparatus for producing wooden wall coverings and veneers, comprising a device for supplying adhesive coating to a backing taken from a roll, means for varying and fixing the position of said coating device with respect to means for uniting the backing with a veneer taken also from a roll, a drying cylinder of large diameter loosely and rotatably mounted in a movable and fixable frame, means for guiding the united material so as to keep the veneer side thereof in contact with the drying cylinder, a set of rolls arranged to furnish the united and warmed web with a satin finish by the pressure of the smooth peripheral surfaces of the said rolls and exert on the web a suflicient' pull to ensure its passage through the aforesaid devices, and over the heated surface of the drying cylinder, and means for rewinding the finished web in roll form.

5. An apparatus for producing wooden wall coverings and veneers, comprising a device for supplying adhesive coating to a backing taken from a roll, means for varying and fixing the position of said coating device with respect to means for uniting the backing with a veneer taken also from a roll, a drying cylinder of large diameter loosely and rotatably mounted in a movable and fixable frame, means for guiding the united material so as to keep the veneer side thereof in contact with the drying cylinder, means for causing the veneer side of the united web to be pressed against the heated surface of the cylinder through a great are, a set of rolls arranged .to furnish the united and warmed web with a satin finish by the pressure of the smooth peripheral surfaces of the said rolls and exert on the web a sumcient pull to ensure its passage through the aforesaid devices and over the heated surface of the drying cylinder, and means for rewinding the finished web in roll form. I

6. An apparatus for producing wooden wall coverings and veneers, comprising a device for sun: plying adhesive coating to a backing taken from a roll, means for varying and fixing the position of said coating device with respect to means for uniting the backing with a veneer taken also from a roll, a drying cylinder of large diameter loosely and rotatably mounted in a movable frame, means for heating the cylinder to an adjustable degree, means for keeping the veneer side of theunited web against the heated surface of the cylinder through a great arc, a set of rolls arranged to furnish the united and warmed web with a satin finish and to exert on the web the necessary pull to ensure its passage through the aforesaid devices and over the heated surface of the drying cylinder, and means for rewinding the finished web in roll form.

7. An apparatus for producing wooden wall coverings, and veneers, comprising a support mounted to roll on rails, a roll of veneer backing on the support, a device on the support for applying adhesive coating to the backing, a rigid frame carrying a pair of rollers, a roll of veneer in the frame arranged to be united with the backing by said latter rollers, a drying cylinder of large diameter loosely and rotatably mounted in a movable frame, means for heating the cylinder to an adjustable degree, means for keeping the veneer side of the united web against the heatedsurface of the cylinder through a great are, a set of rolls for furnishing the united and warmed web with a satin finish and for exerting on the web the necessary pull to ensure its passage through the aforesaid devices and over the heated surface of the drying cylinder, and means for rewinding the finished web in roll form.

8. An apparatus for producing wooden wall coverings and veneers comprising a support mounted to roll on rails, a roll of veneer backing on the support, adhesive container on the support having at its bottom two rollers forming a gap of adjustable size arranged to apply adhesive to the backing, a rigid frame carrying a pair of rollers, a roll of veneer in the frame arranged to be united with the backing by said latter rollers, a drying cylinder of large diameter loosely and rotatably mounted in a movable frame, means for heating the cylinder to an adjustable degree, means for keeping the veneer side of the united web against the heated surface of the cylinder through a great arc, a set of rolls for furnishing the united and warmed web with a satin finish and for exerting on the web the necessary pull to ensure its passage through the aforesaid devices and over the heated surface of the drying web in roll form.