US2356625A - Building plate - Google Patents

Description

Aug- 2 9 4- A. SCHUMANN BUILDING PLATE Filed Jan. 31, 1940 In ven for 06 va Z Allorney Patented Aug. 22, 1944 1 BUILDING PLATE Artur Schumann, Kustrin-Neustadt, Germany; vested in the Alien Property Custodian Application January 31, 1940, Serial No. 316,636 In Germany January 18, 1938 7 Claims.

Plates for building purposes are known which consist of an armouring and of a filling substance, the armouring being encased inside the filling substance. The known plates are not always advantageous because, owing to the position of the armouring in the neutral fibre of the cross section, the resistance against bending is not high enough. If the armouring consists of iron, for example iron wires or wire netting, the plate cannot be cut and planed, and it can be nailed only to a limited extent and is also expensive.

These disadvantages are obviated by increasing the bending strength in arranging thin plates of veneer wood on both sides of the filling substance, which consists of saw dust with a binding medium, for example gypsum, and in attaching, for example, gluing, waste wood strips, preferably waste veneer wood strips, to the mentioned plates of veneer wood, in this way forming the armouring. The waste wood strips are arranged so as to cross the fibres of the veneer plates. The preparation of the plate according to the invention is comparatively simple. As only waste wood strips of a low value are used, for example waste edges, veneer wastes or the like, which are obtained in squaring timber, the cost of making the plate is comparatively low. Of course, veneers may be used instead of the waste wood strips, in which case, however, the cost of making the plate according to the invention will not be low as when using ordinary waste strips.

The subject of the invention is illustrated by way of example in the accompanying drawing in which:

Fig, 1 is a plan view of a plate according to the invention, and

Fig. 2 is a cross section of the plate on the line IIII of Fig. 1.

Fig. 3 is a cross-sectional view of a modified form.

In the drawing, a, and b indicate thin wood each of the veneer plates a and b is highly strengthened by the waste wood strips glued on. According to the invention, two veneer plates with glued on waste wood strips are combined to form a building plate by means of a filling substance consisting principally of saw dust. As binding for example cement, gypsum, bitumen, asphalt,

artificial resin, albumen, casein, waterglass, dex trine, light cements and the like are used. A building plate made in this way may be readily sawed, planed, nailed or worked in any other way.

The arrangement of the waste wood strips is made, as will be seen from the drawing, so that the waste wood strips of the plate a alternate with the waste wood strips of the'plate b, leaving corresponding spaces,

The building plate according to the invention is made in the following way:

First in the veneer plate b, for example, is placed with the waste veneer strips e at the top on a support, and then the filling substance 0, mixed with the binding medium, is applied in a thick layer of, for example, 1 to 2 cm. height. Then, the veneer plate a is placed with the waste veneer strips (1, which are glued on to the plate, upon the filling substance, and the whole is pressed together. An important advantage in using waste strips consists in the fact that these have at least one rough or uneven edge, as indicated at e1, whereby a particularly tight and fast,

anchoring of these waste strips in the filling substance is obtained.

Instead of single veneer plates a and b, it is, of course, possible to use several vener plates glued together, so-called plywood plates, which, however, raises the cost of making the building plate.

If, for special purposes, the tensile strength of the building plate in the direction of the fibres g of the veneer plates :1 and b should not be sufficient, there may be arranged waste veneer strips in the middle of the plate in the direction of the fibres g, as indicated at h.

The building plate according to the invention is suitable for many purposes, such as walls, wall panels, ceilings, furniture parts and the like, and,

besides its cheapncss, it has the advantage of being very strong and highly resistant to weather influences. It does not become distorted and may be easily polished.

What I claim is:

1. A building plate capable of being cut, planed and nailed consisting of two spaced thin veneer plates, thin veneer waste strips arranged on the proximate faces of each of said plates at a distance not greater than about the double walls along elongated areas staggered one with the other.

2. A building plate capable of being cut, planed and nailed consisting of two spaced thin veneer plates, thin veneer waste strips, arranged on the proximate faces of each of said plates at a distance not greater than about the double width of the waste veneer strips from each other and glued to the veneer plates across the direction of the fibers of the latter alternately with one and with the other veneer plate to form opposed interrupted surfaces, and a compressed conformable binding medium mixed with cement, the essential ingredient thereof being sawdust for uniting said opposed interrupted surfaces to form a panel, said waste strips serving to reinforce the opposite panel walls along elongated areas staggered one with the other.

3. A building plate capable of being cut, planed and nailed consisting of two spaced thin veneer plates, thin veneer waste strips, arranged on the proximate faces of each of said plates at a distance not greater than about the double width of the veneer waste strips from each other and glued to the veneer plates across the direction of the fibers of the latter alternately with one and with the other veneer plate to form opposed interrupted surfaces, individual veneer waste strips positioned substantially midway between said interrupted surfaces, said individual strips extending parallel to the direction of the fibers of the veneer plates and a compressed conformable filling substance mixed with a binding medium for binding the interrupted surfaces of said veneer plates in spaced relation to the opposite faces of said individual strips to form a panel, said waste strips serving to reinforce the opposite panel walls along elongated areas staggered one with the other.

,4. A building panel capable of being cut, planed and nailed comprising two spaced veneer plates, a plurality of separate veneer strips secured to the proximate faces of each of said plates, the longitudinal axes of said strips extending trans versely of the fibers of said plates to reinforce the plates and to provide interrupted surfaces on the proximate faces thereof, and a mouldable and hardenable substance conforming to the space between said proximate interrupted surfaces for binding said spaced veneer plates and associated strips together to form a panel.

5. A building panel comprising a pair of spaced veneer plates, a plurality of flat strips glued to the proximate faces of said plates to provide opposed interrupted surfaces, and a mouldable and hardenable substance conforming to the space between said opposed interrupted surfaces for binding said spaced veneer plates and associated strips together to form a panel.

6. A building panel comprising a pair of substantially parallel thin veneer plates spaced apart from each other, a plurality of parallel waste strips alternately spaced on the proximate faces of said veneer plates, to thereby provide opposed interrupted surfaces, the longitudinal axes of said strips extending transversely of the fibers in said plates, and a plastic binding substance composed of sawdust and gypsum conforming to the space between said opposed interrupted surfaces for binding said spaced veneer plates and associated strips together to form a panel, said Waste strips serving to alternately reinforce the outer walls of said panel along parallel elongated areas.

7. A building plate according to claim 6 in which a plurality of second veneer strips are arranged within said plastic binding substance transversely of and substantially midway between said opposed interrupted surfaces, whereby said waste strips Will cooperate with said second strips to provide reinforcement in both directions.

ARTUR SCHUMANN.

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