US474307A - Wood-graining machine - Google Patents

Description

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J. SHANNON.` WOOD GRAINING MACHINE.

No, 474,307. Patented vMay 3, 1892.

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N Woon GRAINING MACHINE.

No. 474,307. Patented May 3, 1892.

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i J. SHANNON. WOOD GRAINING MAGHINB.

No. 474,307.' Patented May 3, 1.892.

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WITNESSES NITED STATES JOI-IN SHANNON, OF PITTSBURG, PENNSYLVANIA.

WOOD-GRAINING MACHINE.

SPECIFICATION forming partof Letters Patent No. 474,307, dated May 3, 1892.

Application filed November 19, 1891. Serial No. 412,487. (No model.)

To all whom it may concern.-

Be it known that I, JOHN SHANNON, a citi- Zen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented or discovered a certain new and useful Improvement inVood- Graining Machines, of which improvement the following is a specification.

My present invention relates to wood-graining machines of the class set forth in an application for Letters Patent of the United States filed by me under date of November 26, 1890, Serial No. 372,653; and its object is to enable graining of any desired degree of closeness or fineness to be effected with speed and accuracy, and without limitation ordinarily due to thickness of the scoring-blades and of the interposed guides or division pieces.

To this end myinvention, generally stated, consists in the combination of an endless traversing belt design-plate having an `embossed or relieved surface and two or more scoring-blade holders, each located transversely to the line of movement of the designplate and fitted with a series of scoring-blades abutting continuously against the embossed or relieved surface of the design-plate, also, in means for guiding the working surface of the design-plate and maintaining its normal and operative bearing upon the scoring-blades and for effecting the relative lateral adj ust.- ment of the several series of scoring-blades. The improvement claimed is hereinafter fully set forth.

In the accompanying drawings, Figure l is side view in elevation of a wood-graining machine embodying my invention Fig. 2, a plan or top view of the same; Fig. 3, a vertical longitudlnal central section; Figs. 4 and 5, transverse sections on an enlarged scale through the design-plate and guide-frame at the lines m and y y, respectively, of Fig. 3; Fig. 6, a similar section, but taken only through one of the slats or sections of the design-plate; Fig. 7, a transverse section on an enlarged scale through one of the scoringblade holders; Fig. 8, a plan view of a portion of one of the spring-plates, and Fig. 9, an isolnetrical view partly in section, showing part of the design-plate and the relation of the guides and scoring-blade holders thereto.

In the practice of my inventionI provide a table or rest l, which is preferably of metal,

'having its upper surface truly plane and is supported upon side frames or standards 2.

`The design-plate 3 upon the surface of which a pattern or representation of the design of graining which is to be reproduced, is einbossed or formed in low relief in any suitable manner, is composed of a series of rectangu- 'lar sections or slats 3, which are coupled one Bf, formed upon the ends of the design-plate sections 3C, engage correspondi ng recesses Alb in the peripheries of the drums 4E, one of which is rotated by the application of power, and consequently effects the longitudinal trav- -erse of the connected design-plate sections.

The movement of the design-p1ate is effected l coincidentally with and at the same surface speed as is due to the rotation of two pairs of upper and lower feed-rolls l5 14, by which the strip of wood to be grained is fed along The feed-rolls 14 are mounted in the table. fixed bearings below the table, with their peripheries tangential to the upper surface thereof, and the rolls l5 are mounted in adjustable bearings above the table. A drivingshaft 6, mounted in bearings on the frame 2 of the machine, carries a driving-pulley 6, which is rotated by a belt 6", transmitting power from any suitable prime mover. The shaft 6 also carries a pulley 6c and, through belts 6B, passing around said pulley and around pulleys 14h on the shafts 14a of the lower feedrolls 14, imparts rotation in similar direction to both of said shafts and rolls. Each of the shafts 14 carries a pair of gears 25, meshing with a pair of gears 24, which in turn mesh with a pair of gears 22,and these with a pair ICO vIO

upon the shaft 4 of the adjacent drum. The proportions of the gearing are such that the feed-rolls and design-plate shall have the same surface speed. Thelower part of the endlessbelt design-plate 3 is held rigid and truly parallel to the surface of the table l during its traverse from one of the drums 4E to the other by means of projections or iianges 3Prg on the ends of the design-plate sections 3, said projections fitting and sliding longitudinally in guides la, formed on the tops of vertical guidefraines lb, fixed to the sides of the table. It will be seen that the engagement of the projections 3g and guides l renders the series of design-plate sections which constitute the lower part of the endless-belt design-plate a rigid structure, preventing the sagging of said lower part and enabling it to transmit to the scoring-blades the required operating pressure.

In the machine which forms the subjectmatter of my application Serial No. 372,653, aforesaid, a single series of scoring-blades set transversely to the line of traverse of the strip of wood to be grained is employed,and it will be seen that the degree of closeness or fineness of graining is consequently limited by reason of the thickness of the scoring-blades and of the guides or division-plates interposed between them. Under my present invention such limitation is removed and any desired degree of fineness of graining attained by the provision of multiple series of scoring-blades located in different vertical transverse planes in the machine, so that the spaces between the scores or incisions made by one series of blades maybe scored or incised by the blades of the other series, the closeness and relation of the markings of the different series of blades being dependent upon the number and relative arrangement of the scoring-blades and of the several series of blades. To this end I provide two or more scoring-blade holders 10a, which are fitted with the capacity of transverse and vertical adjustment in the guide-frames lb, the scoring-blade holders being set transversely to the line of traverse of thedesign-plate and the strip of wood to be grained in different vertical planes between the axes of the drums es, on which the design -plate traverses. A series of scoringblade stocks 8, having scoring-blades 7 formed upon their lower ends, is fitted to slide vertically in each of the scoring-blade holders l0, the stocks 8 abutting directly and continuously against the alternately raised and depressed portions of the surface of the designplate and being reciprocated toward and from the surface of the table, respectively, by the pressure of the design-plate and by springs l2, formed upon spring-plates 12C, iixed in the holders l0, the springs 12b engaging notches or shoulders in the sides of the scoring-blade stocks and exerting upward pressure, b v which the stocks are elevated to withdraw the points of the scoring-blades from the strip of wood which is fed beneath them when and during the periods in which the depressed portions of the design-plate are broughtopposite to the bearing points or faces of the stocks 8 thereon. The scoring-blade holders are set so that the scoring-blades of the several holders shall be alternated 1n position transversely, and the transverse adjustment of the holders to maintain the proper relation of the different series of blades is effected by means of set-screws 10C, engaging threads in the ends of the holders l0 and bearing against the guide-frames 1l. Vertical adjustment of the holders is provided for by set-screws 10d, engaging'threads in the guide-frames and bearing against the lower sides of the scoring-blade holders.

l claim as my invention and desire to secure by Letters Patentl. In a wood-graining machine, the combination of a table 0r rest, an endless-belt design-plate having an embossed or relieved surface and iitted to traverse above the table, two or more scoring-blade holders, each Vlocated in a plane transverse to the line of Vmovement of the design-plate, and a series of scoring-blades iixed upon stocks which are fitted to move toward and from the table in each of the scoring-blade holders, and which abut directly and continuously against the surface of the design-plate, substantially as set forth.

2. In a wood-graining machine, the combination ot' a table or rest, an endless-belt design-plate having an embossed or relieved surface and fitted to traverse above the table, two or more scoring-blade holders, each located in a plane transverse to the line of movement of the design-plate, devices for effecting the adjustment of the scoring-blade holders transversely to the line of movement `of the design-plate, and a series of scoringblades fixed upon stocks which are iitted to move toward and from the table in each of the scoring-blade holders and which abut directly and continuously against the surface of the design-plate, substantially as set forth.

3. In a wood-graining machine, the combination of a table or rest, an endless-belt design-plate having an embossed or relieved surface and fitted to traverse abovethe table, two or more scoring-blade holders each 1ocated in a plane transverse to the line of movement of the design-plate, devices for effecting thevertical adjustment of the scoringblade holders, and a series of scoring-blades fixed upon stocks which are fitted to move -toward and from the table in each of the scoring-blade holders and which abut directly and continuously against the surface of the design-plate, substantially as set forth.

4. In a wood-graining machine, the combination of a table or rest, an endless-belt design-plate having an embossed or relieved surface and iitted to traverse above the table, guiding devices for maintaining the rigidity of the partor side of the endless-belt designplate nearest the table, two or more scoring- IOO IIO

blade holders each located in a plane transverse to the line of movement of the designplate, and aseries of scoring-blades fixed upon stocks which are fitted to move toward and from the table in each of the scoring-blade holders and which abut directly and continuously against the surface of the design-plate, substantially as set forth.

5. In a Wood-graining machine, the combination of a table or rest, an endless-belt design-plate having an embossed or relieved surface and iitted to traverse above the table, drums carrying the ends of said endless-belt design-plate, feed-rolls and driving mechanism for effecting the traverse of a strip of wood to be grained upon the table, drivinggearing imparting rotation to one of the earlVitnesses:

J. SNOWDEN BELL, R H. WHITTLEsEY.

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