US466376A - Grained soft wood - Google Patents

Description

' (No Model.) 3 SheetsSheet 1.

J. SHANNON.

GRAINED SOFT WOOD- No. 466,376. Patented Jan. 5, 1892.

INVENTOR WITNESSES (No Model.) 3-Sheets'Shee.t 2.

" J. SHANNON.

B NED SOFT WOOD. Patented Jan. 5, 1892.

WITNESSE5 (No Model.) '3 Sheets-Sheet 3.'

J. SHANNON.

GRAINED SOFT WOOD.

Patented Jan. 5,1892;

INVENTOR.

WITNESSES.

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UNITED] STATES ATENT OFFICE.

JOHN SHANNON, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO HIMSELF AND PETER CASEY, OF SAME PLACE, AND IVILLIAM W. GRIER, OF

HULTON, PENNSYLVANIA.

GRAINED S OFT WOOD.

S2EGIFICATION forming part of Letters Patent No. 466,376, dated January 5, 1892. Application filed January 30, 1891. Serial No. 379,647. (No specimens.)

.vertical section on the line III III of Fig. 1.

Fig. 4 is a plan view of the machine. Fig. 5 is a sectional View of an indenting-roller of modified construction. Fig. 6 is a plan view of an indented and filled board.- Fig. 7 is a vertical section on the line VII VII of Fig. 6.

Like symbols of reference indicate like parts in each. p

The object of my'invention is to make it possible to produce on soft wood an imitation not only of the surface appearance of hard wood, such as oak, ash, chestnut, &c., but to impart to the surface the characteristic qualities of hardness, denseness, and strength which pertain to the hard wood.

In treating wood in accordance with my invention I take a piece of soft woodsuch as pine, poplar, hemlock, or other woods possessing the peculiar characteristics appertaining to wood of the class known to the art as soft wood-and by means of suitable apparatus I produce on its surface series of numerous small indentations or cuts extending in the line of the grain of the wood and placed near to each other in such position as to imitate closely the peculiar arrangement of the surface. pores forming the growth or pattern of the wood desired to be simulated. The depth of these cuts is preferably about one-sixteenth of an inch, more or less. WVhen the board has been treated thus, I apply to its sursuch composition that it will harden and set in the artificial pores, producing on the woods surface a mosaic composed of a great number of stony plugs firmly embedded in the Wood in close proximity to each other. This brings out the ornamental pattern clearly and beautifully, and because of the hard nature imparted to the surface of the wood it makes it hard and durable, practically as much so as the surface of true hard wood itself. The wood thus treated may then be polished or otherwise worked to adapt it to the use to which it is to be put.

The advantage which I derive from my invention is that I get a board which because of the soft nature of its base can be worked and out without the labor and expense required in fitting hard wood, while. by reason of the induration of its surface it affords all the advantages of denseness, beauty, and susceptibility of high polish appertaining to the best hard woods.

Asuitable mineral filler is made according to the following formula: Corn-starch, three parts; pumice-stone, one part; silver-whiting, six parts. These ingredients are ground and mixed with oil and turpentine to form a paste.

Other suitable filling materials having a mineral base may be used, since my invention is not limited to any particular kind of filler further than that it must be a mineral filler capable of hardening and setting in the pores of the wood.

Referring now to the drawings, 2 represents the frame of a machine adapted to indent boards for the manufacture of my improved product. 3 is the indenting-roller, journaled in suitable standards da'nd adapted to be rotated by a belt- pulley 5, and 6 is a supporting-roller journaled below the roller 3. The indenting-roller is composed of a cylindrical shell set on a central shaft 7 and provided with a series of encircling steel-bands or rings 8, formed with indenting-teeth so situate relatively to each other as to'impress ona board passed beneath the roller indentations arranged in proper order to produce a grain-pattern on the surface thereof. The teeth may be formed by acid-etching, as described in my prior patent application, Serial No. 350,748, filed May 6, 1890, or

the roller and teeth may be otherwise formed, since their construction and the mode of forming the indentations do not form features of limitation of my present invention.

5 When the board is passed between the rollers o and (3, indentations are pressed on it, as shown in Fig. (i. In Fig. 7 I show these indentations filled with the plugs of mineral filler above described. In this figure the proportional size and intervening distance between the indentations are somewhat exaggerated for better illustration.

In Fig". 5 I show an indenting-roller of longitudinally-curved peripheral outline adapted to indent moldings of corresponding shape in cross-section.

I elain1-- Asa new article of manufacture, wood hav ing a natural soft body and an ind nrated snrface comprising series of closely-adjacent stony plugs of mineral paste set in artificial indentations arranged in proper order to simulate the natural surface appearance of hard wood, substantially as and for the purposes described.

In testimony whereof I have hereunto set my hand this 20th day of January, A. D1891.

JOHN SI'IANNON. Witnesses:

THOMAS W. BAKEWELL, W. 13. CORWIN.

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