US3695966A

US3695966A - Method of manufacturing furniture fabrication cores

Info

Publication number: US3695966A
Application number: US34836A
Authority: US
Inventors: Frederick S Kuhns
Original assignee: Southern Laminating Co; Tri-State Veneer and Plywood Co
Current assignee: Southern Laminating Co; Tri-State Veneer and Plywood Co
Priority date: 1970-05-05
Filing date: 1970-05-05
Publication date: 1972-10-03
Anticipated expiration: 1989-10-03

Abstract

A METHOD USED TO MANUFACTURE AN ELONGATED TUBULAR CORE, HAVING A WOOD VENEER SURFACE THEREON, THAT CAN BE USED IN FABRICATING A BASIC COMPONENT FOR COMPOSITE FURNITURE OR THE LIKE. THE CORES, EACH BEING TUBULAR IN CROSS SECTION, ARE BUILT IN A VARIETY OF SHAPES FOR DIFFERENT INTENDED USES, E.G., A TRANSVERSELY SERVED PORTION OF A ROUND OR OCTANGULAR TUBULAR CORE MIGHT BE MADE USE OF TO FORM THE VERTICAL WALLS OF A DRUM-TYPE END TABLE OR A TRANSVERSELY SERVED PORTION OF A RECTANGULAR CORE MIGHT BE USED TO FORM THE FOUR SIDES OF A TELEVISION OR STEREO CONSOLE CABINET. THE METHOD INCLUDES THE UTILIZATION OF AT LEAST ONE FLEXIBLE SHEET OF WOOD VENEER, A WEB OF PAPER AND A ROTATING MANDREL AND COMPRISES PROVIDING THE WEB OF PAPER IN ROLL FORM, PLACING THE ROLL AND THE MANDREL IN A SUBSTANTIAL PARELLEL ARRANGEMENT, YIELDABLY UNWINDING THE PAPER FROM THE ROLL AND ADVANCING IT PAST A FIRST WORK STATION TOWARD A SECOND WORK STATION AT THE MANDREL, COATING THE UNDERSIDE OF THE PAPER WITH A BONDING AGENT AS IT PASSES THE FIRST WORK STATION, CONVOLUTELY WINDING THE PAPER ABOUT THE MANDREL AS THE PAPER REACHED THE SECOND WORK STATION, PROVIDING A PREDETERMINED LENGTH OF A FLEXIBLE SHEET OF WOOD VENEER, PLACING THE SHEET OF VENEER IN AN APPROACH PATH HAVING A DIRECTION OF TRAVEL LYING IN A PLANE SUBSTANTIALLY PERPENDICULAR TO THE LONGITUDINAL AXIS OF THE MANDREL, ADVANCING THE SHEET OF VENEER PAST A THIRD WORK STATION AND THENCE SUBJACENT AND TOGETHER WITH THE PAPER, COATING THE SHEET OF VENEER WITH A BONDING AGENT AS IT PASSES THE THIRD WORK STATION AND SIMULTANEOUSLY INTERJECTING THE SHEET OF VENEER BETWEEN ONE CIRCUMFERENTIAL WINDING AND A SUCCEEDING WINDING OF THE PAPER AT THE SECOND WORK STATION.

Description

F. S. KUHNS Oct. 3, 1972 METHOD OF MANUFACTURING FURNITURE FABRICATION CORES INVENTOR. FREDERICK S. KUHNS BY g g ,ZW fl E United States Patent 01 hce 3,695,966 Patented Oct. 3, 1972 US. Cl. 156-190 8 Claims ABSTRACT OF THE DISCLOSURE A method used to manufacture an elongated tubular core, having a Wood veneer surface thereon, that can be used in fabricating a basic component for composite furniture or the like. The cores, each being tubular in cross section, are built in a variety of shapes for different intended uses, e.g., a transversely severed portion of a round or octangular tubular core might be made use of to form the vertical walls of a drum-type end table or a transversely severed portion of a rectangular core might be used to form the four sides of a television or stereo console cabinet. The method includes the utilization of at least one flexible sheet of wood veneer, a Web of paper and a rotating mandrel and comprises providing the web of paper in roll form, placing the roll and the mandrel in a substantial parallel arrangement, yieldably unwinding the paper from the roll and advancing it past a first Work station toward a second work station at the mandrel, coating the underside of the paper with a bonding agent as it passes the first work station, convolutely winding the paper about the mandrel as the paper reaches the second work station, providing a predetermined length of a flexible sheet of wood veneer, placing the sheet of veneer in an approach path having a direction of travel lying in a plane substantially perpendicular to the longitudinal axis of the mandrel, advancing the sheet of veneer past a third Work station and thence subjacent and together with the paper, coating the sheet of veneer with a bonding agent as it passes the third Work station and simultaneously interjecting the sheet of veneer between one circumferential Winding and a succeeding winding of the paper at the second work station.

BACKGROUND OF THE INVENTION (1) Field of the invention This invention relates to wood working processes including surface bonding of flexible veneers and multiple layers of paper.

(2) Description of the prior art The process of manufacturing wood tubing or the like is well known, e.g., the Atwood Pat. No. 2,016,273; the Goldman Pat. No. 2,352,533 and the Goldman et al. Pat. No. 2,402,038. The Atwood Pat. 2,016,273 pertains to a builtup composite cellular structure and teaches the art of emersing dry wood veneer in an acetone solution containing a small percentage of cellulosic plastic material whereas to cause the cellulosic plastic material to impregnate the fibres of the wood and cover both sides of the veneer. The veneer strips, after having been dried, are wound around a shaping mandrel in superposed spiral layers to form a laminated tube and preferably during the winding operation spraying or otherwise applymg cellulosic plastic material to the exposed surfaces of the veneer strips to bond the superposed veneer strips together.

The Goldman Pat. 2,352,533 pertains to the manufacture of wood tubing and the like and teaches the use of a removable mandrel about which is successively wrapped spirally a plurality of layers of thin wood stripping or veneer. Each such layer is individually wound spirally With a selected pitch such that the leading and trailing edges of succeeding turns are abutted. Further, each succeedmg spiral wrap is wound oppositely to the one preceding, so that the resulting core is made up of the given plurality of layers or plies individually alternated as to the direction of wind. Each such thin wood layer as spirally laid on the mandrel is coated with a bonding of plastic agents, such as certain glues, cements or like adhesives or uniting agents, preferably one of the polymerizable or plastic type either of the cold setting or the heat setting variety. Pressure is then applied uniformly to the entire core in any one of several specified methods. The core is subjected to a drying treatment prior to havmg a final wrapping of wood veneer in sheet form wound straight onto the core, i.e., with the side edges of the veneer sheets perpendicular to the core axis.

The Goldman et al. Pat. 2,402,038 pertains to wood tubing manufacturing and teaches a method of manufacturing an endless core whereby wood veneer is spirally Wrapped around a stationary mandrel which is first coated with a Wax paper carrier and which enables the tubing, after becoming solidified, to be slidingly removed from the stationary mandrel. The process involves numerous stations whereby wood veneer is Wound in opposite directions as the tube is caused to extrude from the mandrel and involves unique heating and pressing stations. The tubing is severed at the end of the processing line to any desired length.

The process of convolutely winding a web of paper continuously about a rotating mandrel, until the number of convolutions is sufiicient to build up the desired thickness in the walls of the tube, all. while the paper web is fed to the mandrel in an approach path having a direction of travel lying in a plane substantially perpendicular to the axis of the mandrel or core and applying adhesive to the paper web as it advances toward the mandrel is well known, e.g., the Weller Pat. No. 3,371,963, wherein he references the application of Marvin W. Swaim, Ser. No. 220,197, filed Aug. 29, 1962.

The process of utilizing such convolutely-wound paper tubes to make raw materials for the construction of furniture, such as chairs, benches, tools, tables and the like is well known, e.g., the Weller Pat. No. 3,371,963. However, the disadvantages of using a tubular core made from paper alone are:

(a) The strength of a core made entirely of paper is considerably less than desirable for fabricating a basic component for composite furniture, i.e., television console cabinets and the like.

(b) The obverse surface of a core made entirely of paper is not acceptable for achieving the optimum aesthetic effect necessary in the art of manufacturing television console cabinets and the like.

3 SUMMARY OF THE INVENTION The present invention is directed towards providing a core that can be used in fabricating a basic component for composite furniture or the like that is void of the disadvantages of a core fabricated entirely from paper. The concept of the present invention is to provide a tubular core which has the advantages of a core made entirely from veneer, i.e., structural strength as well as natural wood grain beauty, but can be manufactured for a fraction of the cost of a core made entirely from wood veneer.

An important feature of the present invention is the diversification in structure, e.g.,. a first flexible wood veneer layer may be wound on the mandrel initially, i.e., substantially before any paper is wound on the mandrel, or the first flexible wood veneer layer may be interposed, i.e., after several layers of paper have first been wound on the mandrel. In either event, the first flexible wood veneer layer adds considerable strength to the structure of the core comprising at least one convolution but never more than two. The paper is convolutely wound about the rotating shaping mandrel until the number of convolutions is sufficient to build up the desired thickness in the walls of the core. A second flexible wood veneer layer is then injected being convolutely wound circumjacent the paper, which forms the outer or obverse surface of the core. The main object of this second layer is for achieving the optimum aesthetic qualities of natural wood grain. The wood veneer pieces for the first and second layers of one such core, e.g., one having a length of eight feet and an exterior girth of 12 feet, are rectangular in shape and have a predetermined length. These rectangular pieces are interjected so that the longitudinal axis thereof lies in a plane which is substantially perpendicular to the longitudinal axis of the mandrel or the core. A variety of different size and shape cores is made available by utilizing a specific configured mandrel for each separate shape, e.g., a transversely severed section of a rectangular shaped core could be used to form the four sides of a television console cabinet or the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 schematically depicts a side elevational sectional view of a group of machine elements which may be used to practice the method of manufacturing furniture fabrication cores in accordance with the present invention.

FIG. 2 is a cross sectional view of a core of the present invention after having been removed from the mandrel, depicting a second configured circular core wherein the first wood veneer layer precedes substantially any convolutely wound paper.

FIGS. 3, 4 and 5 further illustrate the diversification concept of the present invention whereby different shaped cores can be manufactured by utilizing a mandrel having substantially the desired shape of the core, i.e., rectangular mandrels for rectangular shaped cores or octangular mandrels for octangular cores, etc.

DESCRIPTION OF THE PREFERRED EMBODIMENT The machine elements for illustrating the method of manufacturing furniture fabrication cores 11 in accordance with the present invention are character referenced as an entity by the numeral 13. The machine 13 includes an interchangeable rotatably mounted collapsible shaping mandrel 15, suitable structure (not shown) for yieldingly paying out a web of paper W from a convolutely wound roll 17, suitable structure (not shown), e.g., conveyor means or the like, for interjecting a first flexible wood veneer layer 19 and a second flexible wood veneer layer 21 and finally suitable support structure (not shown) for supporting a plurality of

glue spreader stations

23, 25, 27.

The core 11 of the present invention includes an elongated tubular composite structure (FIG. 2) comprising numerous layers of superposed paper 29 sandwiched between the first wood veneer layer 19 and the second or obverse wood veneer layer 21, an inner single convolution of paper W' and an outer single convolution of paper W.

The first or inner wood veneer layer 19, usually being rectangular in shape, has a length at least equal to one circumference, i.e., the ends thereof abutting one against the other, or may be extended in length so as not to exceed more than two superposed layers, substantially as depicted in FIG. 2. The width of the inner layer 19 is coextensive with the length of the elongated core 11. It will be understood that when the words length and width are used herein, they are used for purposes of description only and do not necessarily refer to the length of the wood relative to the direction that the grain of the wood runs. The opposite margins of the inner layer 19 are parallel one with the other and the corner edges thereof substantially form a right angle. In other words, the inner layer 19 is usually rectangular. However, certain dimensions of certain cores 11 might dictate that the inner layer 19 have the shape of a square and still other cores 11 might have a. length exceeding its girth in which case a single convolution comprising the inner core would be rectangular but it would be interposed with the longitudinal axis thereof substantially parallel with the longitudinal axis of the core 11.

An important feature of the inner layer 19 is that it greatly increases the strength of the core 11, making it possible to utilize a properly configured core 11 for fabricating a basic component for composite furniture, e.g., a transversely severed section of a rectangular core such as depicted in FIG. 3 may be used to form the four sides of a television or stereo console cabinet. In this regard, suitable apertures (not shown) for the picture tube (not shown) and access to the chassis (not shown) would, of course, be provided. It should be understood that a flat sur face (not shown), e.g., a piece of suitably configured wood veneer or the like, may be used as a horizontal top portion for the television console. Further, certain television console cabinet designs may dictate supporting the core 11 of the present invention a preferred distance above the floor by a plurality of legs or the like.

Certain structural stress requirements and/ or odd shaped mandrels 15, e.g.,. a shaping mandrel (not shown) used in manufacturing the core 11 of FIG. 4, may make it desirable to sandwich the first or inner layer 19 (FIG. 1) between numerous layers of convolutely wound superposed paper 29' and 29". In this regard, the mandrel 15 is caused to rotate through considerably more revolutions thus convolutely winding a suitable thickness of superposed layers of papers 29 (FIG. 1) thereon prior to interposing the inner layer 19. This is a mere matter of adjusting the sequential programmer (not shown) of the machine 13.

The second or outer wood veneer layer 21, usually having a rectangular shape, i.e., assuming the girth of the core 11 exceeds its length, has a predetermined length which is usually equal to the girth of the core 11,. i.e., one end abutting against the other. However, certain cores 11 used to fabricate certain furniture objects, e.g., a bowed front chiffonier (not shown) may make it desirable to shorten the second layer 21 considerably, e.g., like that shown in FIG. 5 wherein only three sides of the core 11 are covered with the second or obverse layer 21. The second or obverse layer 21, while augmenting the strength of the core 11, has as its primary function that of achieving the aesthetic effect of natural wood grain so as to better conform the core 11 to the standards of furniture fabrication techniques. It should be understood that the grain of the obverse layer 21 may run either way, i.e., one such core 11 might have the grain running parallel with the longitudinal axis thereof and still another core 11 might have the grain running perpendicular thereto.

The width of the obverse layer 21 is coextensive with the length of the elongated core 11, i.e., for one such core 11 having a length which is exceeded by its girth and the obverse layer 2 1 comprises one complete convolution, as best viewed in FIG. 2. The opposite margins of the obverse layer 21 are parallel one with the other and the corner edges thereof substantially form a right angle. In other words, the obverse layer 21 is usually rectangular, however, certain dimensions of certain cores 11 might dictate that the obverse layer 21 have a length of a square and still other cores 11 might have a length exceeding its girth in which case a complete convolution comprising the obverse layer 21 would be rectangular but it would be interposed with the longitudinal axis thereof substantially parallel with the longitudinal axis of the core 11.

The glue spreader station 23 comprises an elongated roller 31 rotatably mounted to suitable structure (not shown) and mechanically rotated by a suitable prime mover (not shown). The lowermost portion of the roller 31 extends into an upwardly directed opening in an elongated trough 33, having a length slightly greater than the length of the roller 31, which contains a liquid bonding agent 35, such as polyvinyl, urea resin or the like, that envelops the lower portion of the roller 31.

The cohesion between the molecules of the bonding agent 35 is less than the adhesion, of the bonding agent 35 molecules to the surface of the rollers 31, accordingly, the rotating roller 31 is kept wet with the bonding agent 35. The roller 31, having a length slightly greater than the width of the Web of paper W and having a juxtaposition thereto, carries the bonding agent 35 from the trough 33 and spreads it on the undersurface of the paper web W as it is yieldingly payed out.

The glue spreader station 25 comprises an elongated roller 37 which longitudinally engages a second roller 39 or an adhesive transfer roller both of which are rotatably attached to suitable support structure (not shown) and are mechanically driven by a prime mover (not shown). The lower portion of the roller 37 is submerged in a bath of liquid bonding agent 35 such as polyvinyl, urea resin, or the like, which is contained in an elongated trough 4'1. The structure and theory of operation of the glue spreader station 25 is identical to that just described for the station 23 except the additional roller 39 is interposed between the roller 37 and the respective first or second wood veneer layers 19, 21 and transfers the bonding agent 35 from the roller 37 and spreads it on the top surface of the respective first or second wood veneer layers 19, 21.

The glue spreader station 27 comprises an elongated adhesive transfer roller 43 interposed between the underneath surface of the respective first or second wood veneer layers 19, 21 and a roller 45, a portion of which is submerged in a bath of liquid bonding agents 35 such as polyvinyl, urea resin, or the like contained in a trough 47. The

rollers

43, 45 are rotatably supported by support structure (not shown) and are mechanically rotated by a prime mover (not shown). The structure and theory of operation of the glue spreader station 27 is identical to that as described for the station 23 except the roller 43 transfers the bonding agent 35 from the roller 45 and spreads it on the underneath surface of the respective first or second wood veneer layers 19, 21.

The shaping mandrel is typically attached to suitable support structure (not shown) and is rotatably driven by a prime mover (not shown). It should be understood that suitable conveyor structure (not shown) may be implemented for moving the respective first or second wood veneer layers 19, 21 into the position substantially as illustrated in FIG. 1 wherein the second or obverse wood veneer layer 21 is about to be injected in a direction character referenced byan arrow 49, between the web of paper W and the last layer of the convolutely wound superposed paper 29". Further, suitable severing means (not shown), e.g., a radial arm saw or the like, may be implemented for severing a respective first or second

wood veneer layer

19, 21 to a respective predetermined length. It should be understood that the relative wall thickness of the cores 11 in FIGS. 1 through 5 is greatly exaggerated in order to move clearly illustrate the structure.

The preferred sequence of manufacturing the core 11 of the present invention by the machine 13 comprises: first, placing the desired mandrel 1'5, i.e., depending upon the shape of the desired core, one such mandrel may be circular in cross section, rectangular or octangular, etc., onto the rotatably driven structure (not shown). It should be noted that each mandrel has a suitable recess or the like for securely receiving the end of the paper web W.

The second step comprises placing a roll of paper 17, having a width coextensive with the longitudinal length of the core 11, on its rotatable structure (not shown) which yieldingly allows the web of paper W to be paid out in a direction character referenced by the arrow 51. The end of the web of paper W is secured to the mandrel 15 in any typical manner, e.g., inserted between adjacent collapsible members of the mandrel 15. It should be understood that the

glue spreader stations

23, 25, 27 are properly serviced, i.e., their

respective troughs

33, 41, 47 filled with the bonding agent 35. Further, the

glue spreader stations

23, 25, 27 have engagement and/or disengagement structure (not shown) which may be operatively controlled so as to start and/or stop the glue spreading operation at any of the one

stations

23, 25, 27 selectively at any given time.

Thirdly, the mandrel 15 is caused to rotate in a direction character referenced by the arrow 53 and at least one layer of the web of paper W is wound about the mandrel 15. It should be noted that the glue spreader station 23 was in a disengaged position during the above third step, i.e., the first turn of the web of paper W on the mandrel 15 is void of the bonding agent 35.

The fourth step will vary according to the structure and/or desired shape of the core 11 presently being manufactured, i.e., the preferred positioning of the first flexible wood veneer layer 19 for certain structural requirements may dictate interjecting the first layer 19 at this time, other structural and/or shaped cores 15 may dictate a preferred method of first convolutely winding upon the mandrel 15 numerous layers of superposed webs of paper W such as character referenced by the numeral 29 in FIG. 1 the reasons of which were fully described earlier in this disclosure. Assuming the former, the

glue spreader stations

23, 25, 27 are engaged, i.e., the

rollers

31, 39, 43 are brought into an engaged position wherein the roller 31 contiguously engages the underneath surface of the web of paper W, the roller 39 contiguously engages the upper surface of the veneer layer 19 and the roller 43 contiguously engages the underneath surface of the veneer layer 19. In other words, the core 11 selected to fully describe the method of manufacturing has a structure most clearly illustrated in FIG. 2.

Referring briefly to FIG. 2 of the drawing wherein it may be seen that the first of the plurality of convolutions is a web of paper W and the second convolution is the inner wood veneer layer 19 having at least one convolution but never exceeding two. Further, the first convolution of the web of paper W is not bonded to the wood veneer layer 19. Numerous layers of superposed paper 29 are convolutely wound about the Wood veneer layer 19 and are bonded one to the other. The second or obverse wood veneer layer 21, having a length not greater than the girth of the core 11, is positioned so as to become the outermost surface of the core 11. The final convolution is the unbounded web of paper W".

Proceeding now with the method of manufacturing the core 11 of the present invention, the fifth step comprises interjecting the predetermined length of wood veneer 19,

in a manner like the layer 21 is illustrated in FIG. 1. The wood veneer layer 19 preferably has considerable flexibility, however, the resiliency of the layer 19 necessitates the web of paper W being maintained substantially taut so that the veneer layer 19' is guidingly and constrainingly convolutely wound circumjacent between the two layers of the web of paper W, as the mandrel is caused to rotate in the direction of the arrow 53.

Step No. 6 comprises continuing the rotation of the mandrel 15 so that numerous layers of superposed paper 29 are convolutely wound thereon and are bonded one to the other. The thickness of the superposed paper winding 29 may be varied from one core 11 to another as desired.

Step No. 7 comprises interjecting the second or obverse wood veneer layer 21, substantially as depicted in FIG. 1, however, it should be noted that the glue spreader stations 23, are disengaged so as not to spread the bonding agent between the outermost layer of the web of paper W" (FIG. 2) and the outermost surface of the obverse veneer layer 21. The obverse veneer layer 21 preferably has considerable flexibility, however, the resiliency of the layer 21 necessitates the web of paper W being maintained substantially taut so that the layer 21 is guidingly and constrainingly sandwiched between two layers of the web of paper, i.e., the adjacent convolution 29 and the web of paper W", so as to insure optimum surface to surface contact and adhesive between the underneath surface of the veneer 21 and the adjacent layer of the convolutions of paper 29. In the event the veneer layer 21 has considerable resiliency, a preferred method of insuring structural aflinity until the bonding agent 35 has set is to secure a plurality of binding straps (not shown) around the finished core 11 until the bonding agent 35 sets properly.

Step No. 8 comprises collapsing the mandrel 15 which facilitates easy removal therefrom of the finished core 11. The core 11 preferably is moved to a drying station (not shown) and after the bonding agent has set properly, the straps (not shown), if installed, are removed.

Step No. 9 comprises removal of the first and last convolution of the web of paper W' and W, as by cutting the webs W, W" along their edges where joined with the remainder of the paper web, thus exposing the wood grain of the veneer layers 19, 21, as best viewed in FIG. 2. The core 11 is now ready to be severed into suitable lengths, i.e., peculiar to the particular object of furniture that the core 11 may be intended. In the event that the core 11 is to be transported to a separate location for furniture fabrication, it may be desirable to delay the removal of the web of paper W and W" until arrival at the ultimate destination, thus obviating the possibility of the core 11 becoming scuffed and/ or marred in transit.

Although the invention has been described and illustrated with respect to a preferred embodiment thereof, it is to be understood that it is not to be so limited since changes and modifications may be made therein which are within the full intended scope of this invention.

I claim:

1. The method of manufacturing furniture fabrication cores from a flexible sheet of wood veneer, a web of paper and a rotating mandrel comprising the steps of; providing a length of said web of paper in roll form; placing said roll and said mandrel in a substantially parallel arrangement; yieldably unwinding said web from said roll and advancing said web substantially horizontal past a first work station toward a second work station at said mandrel; as said first work station is passed, coating the underside of said web with a bonding agent; upon reaching said second work station, convolutely winding said web about said mandrel into a tubular core; providing a predetermined length of said flexible sheet of wood veneer; placing said sheet of veneer in an approach path having a direction of travel lying in a plane substantially perpendicular to the longitudinal axis of said mandrel; advancing said sheet of veneer past a third work station and thence subjacent and together with said web of paper; as said third work station is passed, coating the underside of said veneer with a bonding agent; and simultaneously interjecting, at said second work station, said sheet of veneer between one circumferential winding and a succeeding winding of said web of paper.

2. The method of claim 1 in which said flexible sheet of veneer has a length less than two convolutions thereof.

3. The method of manufacturing furniture fabrication cores from flexible sheets of veneer, a web of paper and a rotating mandrel comprising the steps of: providing a length of said web of paper in roll form; placing said roll and said mandrel in a substantial parallel arrangement; yieldably unwinding said web from said roll and advancing it substantially horizontally past a first work station towards a second work station at said mandrel; as said first work station is passed, coating the underside of said web with a bonding agent; upon reaching said second work station convolutely winding said web about said mandrel into a tubular core; providing a first predetermined length of said flexible sheet of veneer; placing said first sheet of veneer in an approach path having a direction of travel lying in a plane substantially perpendicular to the 1ongitudinal axis of said mandrel; advancing said first sheet of veneer past a third work station and thence subjacent and together with said web of paper; as said third work station is passed, coating both sides of said veneer with a bonding agent; simultaneously interjecting, at said second work station, said first sheet of veneer circumjacent the first turns of said web of paper so that said first sheet of veneer is interposed between one ciircumferential winding and a succeeding winding of said web of paper; providing a second predetermined length of said flexible sheet of veneer; placing said second sheet of veneer in an approach path having a direction of travel lying in a plane substantially perpendicular to the longitudinal axis of said mandrel; advancing said second sheet of veneer past a third work station and thence subjacent and together with said web of paper; as said third work station is passed coating both sides of said second sheet of veneer with a bonding agent; simultaneously interjecting, at said second work station, said second sheet of veneer circumjacent the latter turns of said web of paper so that said veneer is interposed between one circumferential winding and one final winding of said web of paper; and, after removing said core from said mandrel, removing said final winding of said web of paper so the obverse surface of said core possesses a natural wood grain texture.

4. The method of claim 3 in which said first flexible sheet of veneer has a length which is less than two convolutions thereof.

5. The method of claim 3 in which said second flexible sheet of veneer has a length which is less than the girth of said core.

6. The method of claim 3 in which the said first flexible sheet of veneer is simultaneously interjected circumjacent the intermediate turns of the said web of paper.

7. The method of claim 6 in which said first sheet of veneer has a length which is no greater than two convolutions thereof.

8. The method of manufacturing furniture fabrication cores from a flexible sheet of wood veneer, a web of paper and a rotating mandrel comprising the steps of: providing a length of said web of paper in roll form; placing said roll and said mandrel in a substantially parallel arrangement; yieldably unwinding said web from said roll and advancing said web past a first work station towards a second work station at said mandrel; as said first work station is passed, coating the underside of said web with a bonding agent; upon reaching said second work station, convolutely winding said web about said mandrel into a tubular core; providing a predetermined length of said flexible sheet of wood veneer; placing said sheet of veneer in an approach 9 path having a direction of travel lying in a plane substantially perpendicular to the longitudinal axis of said mandrel; and simultaneously interjecting, at said second Work station, said sheet of veneer between one circumferential Winding and a succeeding winding of said web of paper.

References Cited UNITED STATES PATENTS 10 Atwood 156-182 X Goldman 156-195 X Goldman 156-195 X Goldman 156-195 X Goldman 156-195 X Reissner 156-195 X US. Cl. X.R.