Патент USA US2111494код для вставки
Patented Mar. 15, 1938 _ UNITED STATES Y 2,111,494 PATENT o1=1=1c1z . 2,111,494 PROCESS OF TREATING WOOD Charles F. Preston, Sr., Harrison, N. Y., assignor, by direct and mesne assignments, to Lignose, Ina, Mamaroneck, N. Y., a corporation of New York No Drawing. Application January 24, 1936, Serial No. 60,710 2 Claims. The present invention relates to a process of treating wood, and more particularly to a process by which various of the so-called soft and rela tively inexpensive woods, such as pine and other soft woods, so treated that its surface will be made to resemble in appearance the harder and relatively expensive woods, such as mahogany, walnut, rosewood, teak, and the like. The object of the invention‘ is to so treat the 10 surface of wood having a natural grain, that the fats or gums forming the grain will not only be impregnated with a dye or stain fused therein but will also be hardened, while at the same time removing a portion of the treated surface to a 15 greater or less degree during the ?nishing oper ation, thus producing a ?nished surface in which the natural grain is emphasized in contrast with the adjacent surface composed of soft and spongy ?bers, thereby producing a highly ornamental surface closely imitating the appearance of the harder and more expensive woods. . With the foregoing object in view, my inven tion may be said to consist of a process of ?nishing the surface of wood by applying thereto a dye or stain containing a mild form of acid which acts upon and softens the exposed surface of the grain fats or gums and immediately thereafter subjecting the surface to the action of heat of a temperature su?icient to dry the surface and to soften the grain fats and gums and cause the dye or stain to be absorbed thereby and ?xed therein in the exposed surface thereof. In carrying out my invention the dye or stain or fusing compound will be applied to the surface to be treated. This dye or stain will preferably be one containing any usual form of coal tar coloring such as an aniline dye. Before apply ing it to the surface of the wood there will be added thereto a small amount of vinegar or other form of mild acid, and in some instances a small amount of sugar. When applied to the surface of the wood the dye or stain will be absorbed to a considerable degree, and wherever the fatty grain gum is exposed it will to a cer tain extent be softened permitting the dye to be absorbed thereby. Immediately after applying the dye or stain compound to the surface to be treated, it is subjected to heat applied directly thereto by any suitable heating means as, for instance, by a torch passed rapidly over the sur face or closely adjacent thereto. The heat treat ment should not be continued long enough to produce a scorching effect, but only to that ex tent required to dry the surface and to soften 55 the grain fats or gums and blend the coloring ing tool as, for instance, a wire brush, to remove a portion thereof, and as the fatty grains and gums are much harder than the adjacent soft and spongy ?bers, this abrasive treatment will effect a polishing of the surface thereof bringing out the color or tint, producing a contrasting shade of the natural grain with the adjacent soft ?bers. This abrasive treatment will be continued until sui?cient of the surface has been removed to produce the desired color tone and the har 10 monious blending of the darker shades of colorv in the natural grain with the contrasting lighter shades in the adjacent softer ?bers. Thereafter if desired, and to produce a highly polished. surface, it is subjected to a waxing and 15 polishing brush in the usual manner. The wax employed may be one having a color blended therewith, and this waxing and polishing oper ation may be continued inde?nitely or until the 20 surface has the desired ?nish._ Before subjecting the surface to the waxing and polishing operation, if a harmonious blending of tone is desired, such as that known as gray-green or other blended tone, this may be applied so that it will be taken up by the soft and spongy 25 ?bers adjacent the hard, fatty, grain surface. It may be pointed out that the heat treatment immediately following the application of the dye ing or coloring liquid compound softens the nat urally fatty gums of the wood and ?xes the color 30 therein by producing a liquid steam action,- and that after the heat treatment the fatty grains when dry become much harder which, under the action of the wire brush and subsequent ?nish 35 ing, present a highly polished surface. I claim: ' 1. The method of ?nishing the surface of wood having a natural fatty grain exposed thereon, which comprises the following: applying a stain containing a mild acid to the said surface, sub 40 jecting the stained surface to heat of a tempera ture to soften the exposed fat or gum forming the natural fatty grain to impregnate and ?x the stain therein and thereafter abrading the stained surface to remove a portion of the softer spongy surface to emphasize the natural fatty 2. The method of the surface of wood having a natural fatty grain exposed thereon, which comprises the following: applying a stain containing a weak solution of acetic acid to'the said surface, subjecting the stainedsurface to therewith. After heating and drying, the grain heat of a temperature to soften the exposed fat or gum forming the natural grain to impregnate and ?x the stain therein and thereafter abrad-. fats or gums will become relatively hard with the result that the dye or color is permanently ing the stained surface to reinove a'portion there of, and ?nally waxing and polishing the surface. incorporated therein. 1 next treat the surface with any suitable abrad CHARLES I". PRESTON, SI.