US1007973A - Method of veneering. - Google Patents

Description

P. REGKOW- METHOD OF VENEERING.

APPLIUATION FILED 111111.27, 1911.

1,007,973, Patented Nov. 7, 1911.

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Wflnesses Inf/WET Paul H g DK'UW ninn STATES AENT oFFioE.

PAUL BECKOW, OF CHICAGO. ILLINOIS.

METHOD OF VENEERING.

il M01973.

Specification of Letters Patent.

Patented Nov. '7, 1911.

Application filed March 27, 1911. Serial No. 617,062.

To all whom it may concern:

lie it known that I, PAUL REoKoW, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Methods of Veneersupporting boards Without specially preparing the veneers, and it has been found that i owing to the thinness of the veneers and the open pores characteristic of many woods, the glue thus used is forced through the pores of the veneer and not only spoils the finished effect of the veneer and causes the finished surface to go dead after a time, but the glue finds its way in considerable quantity onto the outer surface of the veneer during the operation of pressing the veneer and base during the drying of the glue, and thus a considerable amount of work is required to remove the glue from the outer surface of the veneer and the veneer is corre- "spondingly reduced in thickness.

By my process, I treat one side of the veneer with a water proof solution which, after drying, is applied to the board by means of glue in the usual manner. The water proof solution serves to effectually close the pores on the inner surface of the veneer without penetrating the veneer to any appreciable degree, and when dry serves to,

ticularly to the use of a water proof solution for treating the under side of the veneer as it has been proposed to use fillers of different kinds upon the under side. of the veneer before gluing the same to the supporting board, Such fillers are invariably mechanical mixtures of solid matter in finely divided .condition mixed with liquid of one kind or another, as a result of which'the solid matter may be worked into the pores of the veneer and left there until the liquid portion of the mixture has evaporated or soaked into the veneer to a certain extent. By my process the water proof solution employed protects the entire under surface of the veneer without perceptibly filling the pores, thus leaving the pores of the veneer free to receive the desired filler upon the outer surface in the usual manner employed in finishing the wood.

Figure 1 shows in cross-section a core board to either side of which a piece of veneer is secured which has been treated in accordance with my process. Fig. 2 shows in a view similar to Fig. 1 an enlarged crosssection of a small portion of the veneer to indicate the relation of the water-proofing film to one ofthe pores in the veneer.

In carrying out my invention the veneer 1 which may be applied either to one side or both sides of the board. 2 is first coated upon its under surface with a water proof solution which when it dries, leaves a thin film of water proof material 3 extending over the inner surface of the veneer in a position to close the pores of the same. The board 2 constituting the base for supporting the veneer may either be a single piece or as is common in many constructions, it may be built up of laminations to prevent it from warping, and in either case it is given a coating of glue 4 and the treated veneer is then applied and held in-place by means of a suitable press until the glue has dried. The result is a veneered board having all of the characteristics of the natural wood which may be finished as desired. The glue, which is very hygroscopic, is thus protected from the action of moisture and prevented from conducting the moisture to the underside of the finish on the outer surface ferred, the solution may be made by dissolving celluloid in one of the solvents mentione In the past in pressin the veneered boards during the drying o the glue, it has been customary to insert between the veneered surfaces heated-cauls or boards having greased surfaces to prevent their sticking to the veneers. v It wasthen necessary after taking the veneered boards from the press to wash them to remove the grease and scrape them to remove the glue By my process this labor is entirely elimi-- nated as it is not necessary to grease the cauls and therefore the veneers need not be washed after the veneered boards are taken from the press, and the scraping operation is entirely eliminated by carefully prepar ing the surface of the base or core stock employed so that it is true. In this way the amount of work required to prepare the surface of the veneer for receiving the finish is reduced to a minimum and the full thickness mg the veneer. In the past considerable difliculty has been experienced in this connection' since veneers have very commonly shrunk after being finished, with the result that the finish of the varnish has become checked, thus causing the fading away of the finish mentioned.

It is to be understood that the veneer treated as described may be applied to a supporting base of any description which is susceptible of being veneered regardless of whether the surface of the base is flat or of other conformation.

While'I have found it preferable to treat the inner surface of the veneer with the water-proof solution, I have also found that similarly treating the outer surface or even dipping the veneer in the water-proof solution, effectually prevents the glue from penetrating through the pores to the outer surface of the veneer to interfere with the finishing of the same. VVhether the veneer "is treated in one way or another as described above, it maybe filled and finished after the glue is dry in substantially the same manner as though it were the solid wood, the essential thing bein to have a film of waterroof material tween the glue and the finish. A result secured by thus coating the veneer with a water-proof solution is indicated in Fig. 2 which is an enlarged cross-sectional view through one of the pores in the veneer. In this figure the veneer. 1 is shown as coated with the water-proof compound 3, which extends into one of the pores 1 of the veneer and across the ore at 3". The exact position of the partition 3 across the pore 1 is of little moment and is determined by the relative rapidity of drying of the two sides of the veneer.- Fig. 2 represents the veneer after the solvent has entirely evaporated leaving the protective film upon the veneer. It is to be borne 1n mind that since the solvent is extremely fluid, the pores will be nearly or completely filled with the liquid when it is applied, and that in connection with woods usually treated by my process the partitions 3 across the pores 1* will usually be about centrally located as indicated. Instead of being a disadvantage, I find that this is a marked advantage since besides leaving the pores open on their outer surface for receiving the filler used in the finishing operation, the pores are left more or less open on their under side, which results in positive engagement between the veneer and the glue.

What I claim is:

1. The process of forming a veneered structure which consists in coating a surface of the veneer with water-proof solution and gluing the treated surface to a supporting base.

2. The process of forming a veneered structure which consists in coating a surface of the veneer with a solution of cotton and camphor in amyl acetate, alcohol and acetone, and gluing the coating and veneer to a supporting base.

3. The process of forming a veneered structure which consists in coating a surface of the veneer with a solution of celluloid in acetone, and gluing the coating and veneer to a supporting base.

4. A veneered structure which comprises a core, a veneer coated with .a water-proof compound extending partly into and across the pores of the'veneer and having its coating secured to the core by means of glue.

In witness whereof, I hereunto subscribe my name this 23rd day of March, A. II, 1911.

PAUL RECKOIV.

Witnesses:

ALBERT C. BELL, LEoNArm E. Boone.

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