US1433077A - Veneering - Google Patents

Description

N. HANSEN.

VENEERYING. APPLICATION FILED JULY 16, I918.

Lggflfifif Patented Oct 24, 1922.

1 V u. v

i called Patente Oct. 24, 1922.

NIIED STATE NIELS HANSEN, OF LYNGBY, DENM VENEERING.

Application filed July 16, 1918, Serial No. 245,234.

To all whom it may concern.

Be it known that I, NIELS HANsEN, a subject of the King of Denmark, residing at Lyngby, 57 Lyngby Hovcdgade, have invented certain new and useful Improvements in Veneering (for which applications have been filed in forei n countries as follows: Denmark, filed ecember 28, 1916, granted February 7, 1918, No. 22825; Denmark, filed October 8, 1917, granted May 1, 1918, No. 23089; Norway, filed September 17, 1917, granted August 5, 1918, No. 28996; Sweden, filed Se tember 20, 1917, granted April 24, 1919, 0. 45372; Germany, filed September 25, 1917, No. H72839, abandoned; Great Britain, filed February 15, 1918, No. 120,160; Holland, filed March 28, 1918, granted Dccember 23, 1921, No. 6383; Finland, filed May 14, 1919, issued December 12, 1919, No. 7 846; Switzerland, filed May 14, 1919, granted October 17, 1921, No. 91373; Belgium, filed May 23,1919, granted June 16, 1919, No. 280412; France, filed June 21, 1919, granted January 9, 1920, No. 500897), of WlllCh the following is a specification.

'The present invention relates to wooden material for covering floors, especially concrete floors, walls, columns, doors and other parts of buildings as well as furniture work and the like. producing a material of this nature resembling parquetry, the said material offering economical advantages above ordinary parquetry flooring and possessing, besides, all the good properties thereof.

The reason why parquetry floors and sostalf-floors have not been more largely used in ordinary house buildings is, mainly, the high cost of such floorings. This cost is caused partly by the large amount of fitting required by flooring of this kind composed of a multitude of pieces, partly by the necessity of using for the flooring hard wood and, frequently, highgrade kinds of wood for which the prices are constantly rising.

In consideration of the good qualities of parquet floors, it has been attempted to further the use of such floors partly by avoiding greater thickness of wood than what corresponds to the supposed admissible depth of wear, partly by simplifying the placing inposition.

It has been proposed, in order to attain this, to manufacture sheets consisting of The invention consists in thin pieces of wood having their entire lower surface cemented, by means of an adheslve to a backing, but not being tongued and grooved-together r otherwise interconnected. The entire ottom side of the wood being thus cemented to a backing, it may be used in very thin dimensions, all the way down to a few millimeters in thickness. 7

As an adhesive various dissolved or unctuous as well as melted substances 'may be used, for instance glue, paste, lacquer, resinous mixtures, asphalt or other bituminous substances, especially Trinidad goudron with a little benzinemixed.

As a backingit is preferred to use linen cloth or other textile fabrics, such as linoleum, icopal, flooring paste-board or strong paper coated with linseed oil and then dried. The backing must be of such a nature that the adhesive used will stick securely to it.

Experience has shown, however, that there is a very considerable drawback attached to the use of such covering sheets, that the wood is much' inclined to warp, so

that the sheet ceases to be plane and the individual wooden slabs may even detach themselves from the backing.

The present invention has for its object to eliminate this defect in that-each individual piece of wood, before being cemented to the backing, is pierced by-a sharp tool at a suitable number of places and in the direction of the grain.

As an illustrative embodiment of the veneering produced according to the invention, reference is made to the accompanying drawing, in which Fig. 1 is a plan view; and

Fig. 2 is a cross-section on the line II-II of Fig. 1.

Reference will be made to the drawing in the following detailed description.

Plates of hard wood 1, three millimeters in thickness are pierced, as at 2, with a sharp tool in rows following the grain, the incisions or perforations being about 3 millimeters long and spaced 8 to 12 millimeters in each row and the distance between the rows being about 3 millimeters while the perforations in any two adjacent rows were staggered. Theresult has then been that the wood treated in this manner has entirely lost any tendency to warp so that, even after years of use, there would not be the least uneveness win the floor surface. The backing is represented as at 3.

The visible marks produced by this perforation may easily be obliterated by treating the surface of the wood with a solut1on of alum whereby all marks become closed com letely. t

T 1e length of the perforations and the dis tance between them must be adjusted according to the thickness and nature of the wood.

The work may be performed easily by the pieces of wood being passed, in the direction of the grain, through a press or aset of rolls, one or both working faces thereof being fitted with small, sharp and narrow teeth of suitable length and in the desired distance from one another. Such rolls may for instance be produced by gathering on a shaft thin members shaped like circular saws alternating with smaller and suitably thick discs, all the cutting members being then fastened in such a manner, that they cannot move about the shaft independently of one another. This arrangement will offer the advantage that even if some of the teeth might break, the roll may easily be properly repaired by substituting a new cuttinv disc for the damaged one.

efore cementing the individual pieces they may be thoroughly dried and impregnated with substances such as oil and resin rendering the wood impervious to moisture. Such sheets may easily be manufactured in any sizes and designs and by the simultaneous use of several kinds of wood, for instance beech, oak, mahogany, ash, colored maple, etc. They are cemented to the floor by means of adhesives of the nature menfication is signed.

tioned above. For their fastening to cement plaster Trinidad goudron, for instance, is eminently suitable.

The manufacturing of the sheets may, by way of example be carried out in the following manner. The several component pieces of the design are placed together in shape of slabs about one half square meter large and are fastened together by gluing thin shavings above the joints on the top face of the Wooden pieces. Then the Wooden pieces fastened together in this manner are placed on the backing, which has previously been coated with one of the above mentioned adhesives. Finally the shavings glued on are removed, and the flooring sheet may then be given a finishing treatment.

The sheets produced are deposited on the existing support of planks, concrete, masonry or the like which previously has been flushed carefully by means of a suitable mortar or a similar mass. The sheets may be waxed, polished etc., exactly like any other joinery work.

The sheets here referred to may also be used in the manufacture of furniture.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

A flooring material, comprising in combination a backing, and a sheet of veneer having a plurality of staggered series of relatively short, narrow, invisible incisions cut entirely through the veneer sheet proper, lengthwise of its grain.

In testimony wnereof the foregoing speci- NIELS HANSEN.

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