US1941394A - Woodworking machine - Google Patents

Description

W; H. FORSYTH WOODWORKING MACHINE Dec. 2 6, 1933.

Filed April 26. 1929 6 Sheets-Sheet l Dec. 26, 1933- 1 w FQRSYTH 1,941,394

WO'ODWORKING MACHINE Filed April 26, 1929 6 Sheets-Sheet 2 Dec. 26, 1933. w. H. FORSYTH 1,941,394

WOODWORKING MACHINE Filed April 26, 1929 6 Sheets-Sheet 3 m Off/0677 5 37: Max 4W1 E23 3 M Dec. 26, 1933; w. H. FORSYTH 1,941,394

WOODWORK I NG MACHINE Filed April 26, 1929 6 Sheets-Sheet 4 Dec. 26, 1933. w; H. FORSYTH WOODWORKING MACHINE Filed April 26, 1929 6 Sheets-Sheet 5 Dec. 26, 1933. w. H. FORSYTH 1,941,394

WOODWORKING MACHINE Filed April 26, 1929 6 Sheets-Sheet 6 (57 WQWW Patented Dec.2fi,1933 v 1 941 39 4 ST ES time woonwoanmc MAGHINE William Form-t, Chicago, 111, i ApplicationApril 26,1929; Serial No. 358,232 6 Claims. (oi. 4i1) My invention relates generally to woodwork- Figure is a fragmentary detailed perspective ing machines, and more particularly to v methods view of the side mounting of the bed frame; of and apparatus for forming moldings and mav- Figure '7 is a transverse sectional view taken terials of like nature. 1 I V substantially along the line 77 of Figure 3; and

One of the primary objects of my present in- Figure Sis a detailed perspective View of the co vention is tojprovide a machine of improved supporting frame for one of the cutter heads. practical construction whereby wooden strips Etc-faring now to the drawings more in detail such as moldings maybe embossed and planed wherein likenume'rals have been employed to. in a single operation without any tendency for designate similar parts throughout the Various said strips to be distorted or bent as the refigures, it will be observed that a machine which 5 suit; of the engagement therewith of forming representative of one embodiment of my indevices. I vention'includesa machine i ramein dioated gen- Another object of my invention is to provide erally by the numeral is which includes two outer, a strip forming device for embossing moldings upright frame sections 12 and l4 and an upright v and t e in Which the Wo y be 'iIIStaIP section 16 positioned intermediate the sections taneously and positively released or disengaged i2 and 14. A pair of shafts 18 and 29, Figure 4, so as to prevent jamming. interposed between the frame sections 12 and 16 Still another object of my present invention is serve to horizontally support a bed frame 22. to provide in a machine of the nature above set The lower edges of the bed frame 22 rest upon I forth, improved means for variously adjusting, a pair of supporting blocks 24 positioned at the the position of the work engaging elements so forward end of thebed frame and apair of as to enablethe machine to be used for embosssimil upporting bl k 26 ,1; th th d of 1 moldings and like i W ge of said bed frame. These supporting blocks 24 and ize and p i V a 26 are in turn mounted upon companion eccentrics- 5 M invention 9315.0 o templates the provision 28 and so respectively, which eccentrics are ro- 30 o appa atu nd methodswhereby ldi gs may atable with their respective shafts 1s and 2o. 0% O ybe effectiVely embossed and planed bu When: these eccentrics are positioned as shown also treated so as to present a satini'zed surface in Figuresl, 4 and 5, the-bed frame 22 will occupy the mOldiIlgS: V 7 its uppermost position. Longitudinal displace '8- Still h f bject of my present invent o 'is ment of the bed frame 22 is prevented. by reason 30 o p v de, n Combination W 9411 embossing of the tongue and groove connection between m chani m, a p ura i y of p aners which may be the upper portions of the frame sections12 and indepen ently dj d adju ted ogether as 15 as clearly shown in Figure 6. It willbe seen aunit ovary degree of Cutting aCtiOnthat the'bed frame 22 is provided with vertical 3; These andnumerous other objects and advan' grooves 32whicn are adapted to receive vertical 99 tease w l/app a in the llow nad scrintion,' tongues 3% formed integral with the frame sec-' when considered in connection with the acccintions 12 and 16. The supporting bloclzs- 24' and naming drawings, wher inr. i, 26 are slidable upon the lower edges of thebed Figure 1 is a side elevational view of an apDaframe 22 and hence vertical displacement may be ratus embodying features of my invlentionwhereimparted to said bed frame without causing the by my improved method ofwoodworkingmay be same tobe horizontally displaced. 1 eifectively practiced; a r A plurality of positively driven feed rolls 36 Figure 2 is an elevational view of the side of are spaced along andsuppo-rted by the bed frame the machine opposite from that disclosed in'Fig- '22 and when said bed frame occupies itsopera- 45 ure 1; v ive or uppermost position,the upper portion of Figure 3, is a'plan view-of the device shown in the periphery of said feed rolls will project above Figure 1, certain portions of the upper structure the plane of the uppersurfaceof the bed 22 so as being broken away to more clearly disclose the to engage the work. Each of these feed rolls 36 functional characteristics ofthe machine; are provided with a plurality of peripheral work "0 Figure 4 is a vertical longitudinal sectional, en aging teeth 38 which are adapted to be suc- 1G5 view taken substantially along the line -'iof cessively carried into operative engagement with Figure 3; a the lower suriace'ofr the work as will later be dea Figure 5 is a transverse vertical sectional view scribed. These feed rolls 36 are positively driven taken substantially along the line 5-501? Figthrough the agency of a drive chain 40 which 55 urexi; Y I connectsya vdrive shaft 42 with a drive ha t 1 44, Figure 5. This driven or stub shaft 44 is rotatably mounted within the upright frame 14 and is coupled with a shaft 46 of one of the feed rolls by means of a slidable or splined connection 48. The opposite extremities of this splined connection 48 are connected by suitable universal joints to the extremities of the shafts 44 and 46. It will be apparent that this universal and splined connection between the shafts 44 and 46 is provided in order to permit the feed rolls 36 to be driven regardless of the vertical position of the shiftable bed 22. The other feed rolls are driven I from the shaft 4.6 by means of suitable chain connections as shown in Figures 1 and 5. Thus, all of the feed rolls are positively driven. When the work is initially fed into the machine it is positioned between a pair of guide bars 56 and beneath a roller 52, Figure 4. The underside of the work is moved into association with the upper peripheral teeth of the first feed roller 36 and beneath an embossing die 54. This rotary embossing die 54 is mounted upon a shaft 56. The shaft 56 is supported by means of three bearing blocks 58, 60 and 62. The bearing blocks 66 and 62 have trunnions 6 1 and are slidably mounted. within upright guides 66. Screws 68 are rotatably mounted at their upper ends in a cross frame '70 and these screws serve to angularly adjust the position of the shaft 56. The angular adjustment of the shaft 56 enables the embossing die 54 to be adjusted in accordance with the nature of the work which is to be embossed. It will also be apparent that the screws 68 as well as the screws '70 and '72 which support the bearing block 58, serve to vertically adjust the position of the die with respect to the feed rolls. For a more detailed description and understanding of the means for angularly adjusting this embossing die 54, reference is made to my Patent No. 1,i86,288, dated March 11, 1924.

After the work or molding has been pressed between the embossing die Stand the first feed roll 36,.the same is advanced beneath a pressure bar '74 and above a friction roll 76. This pressure bar '74 is vertically adjustable by means of a suitable screw 78 and serves to effectively prevent the work from being distorted in response to the engagement of the embossing rod 54 therewith. In other words, the pressure bar or frame '74 and the roll 76 operate to straighten the work. In this connection it will be understood'that when the work passes beneath the embossing die 54 there is a tendency for the work to curl upward- 1y on each side of the die. This bending tendency is counteracted by the engagement of the teeth 38 of the initial feed roll 36 with the underside of the molding. In a sense the teeth 38 imbed themselves within the underside of the work or molding and thereby cause a shortening of that side so as to counteract the bending tendency in the opposite direction which is caused by the pressure of the die 54 on the upper surface of the work. I provide a second pressure roll 80 which is adap;- ed to engage the work after it has been passed between the pressure bar '74 and the friction roll '76. This pressure roll 80 is mounted upon screws in a manner similar to that described in connection with the embossing die 54. I find it preferable in some instances to construct the pressure roll 86 of suitable hard rubber. This roll 80 serves. with the feed roll 36 positioned immediately therebeneath, to straigh en the molding. In some instances it may be desirable to supplant the hard rubber roll 80 with another embossing die. From this point the work passes between another pressure bar or subframe 82 and this frame 82 serves also to straighten the work and provides a guide for directing the work beneath the first of a series of rubber rollers 84. One of the feed rolls 36 is positioned immediately beneath each of these rollers 84' and these rollers are carried by brackets 86. The brackets 86 are carried by and vertically adjustable upon a horizontally disposed pressure bar frame 88. The vertical adjustment of the brackets 86 is accomplished by means of adjusting nuts 96. These rollers 84 co-operate with their companion feed rolls 36 to insure the straightening of the molding. After passing beneath the last roller 84, the work is fed beneath a vertically adjustable pressure bar 92. This pressure bar is supported by the horizontal frame 88 and is vertically adjustable by means of a suitable screw 94. From this point the work is fed into association with a side embossing mechanism which I have designated generally by the numeral 96 and which is shown in detail in Figure '7.

This side embossing mechanism includes a pair of frames 98 and 100 which are mounted within guideways 102 extending transversely of the machine frame. Horizontal displacement of the frame 98 within the guideways 102 is accomplished by means of a screw 104 which carries a wheel 106 and similar displacement of the frame section 100 is occasioned by means of a screw 108 which carries a hand wheel 110. Each of the frames 98 and 100 support side embossing units which include frames 112 pivotally supported at 114. These frames 112 are secured against lateral displacement by means of threaded pins 116 which are pivotally connected at one extremity to said frames and which extend through the frames 98 and 100 at their opposite extremities. Lock nuts 118 are mounted upon the threaded pins 116 and serve to variously adjust the vertical positions of the frames 112. Vertically mounted within the frames 112 and supported by suitable ball bearings 120'are shafts 122 to which are keyed a pair of adjacently positioned embossing rolls 124. The upper ends of these shafts 122 are rotatable within overhanging arms 126. These arms 126 are detachably mounted upon the frames 112 by means of pins 126 which are secured in position by means of set screws 130. In this manner a very convenient means is provided for detachably mounting the side embossing rolls so as to enable said rolls to be conveniently removed for purposes of repair or replacement without disturbing any of the other'parts of the machine. The work is advanced from the side embossing mechanism 96 beneath a vertically adjustable pressure bar 132 and above a planer head This planer head 134. is mounted within a frame 7 136 and this frame 136 is vertically adjustable by means of an adjusting screw 138, Figure 4. A second and larger planer head 140 is provided which is vertically adjustable independently of the planer head 134 by means of the adjusting screws 142. From the foregoing it is to be understood that the adjusting screw 138 serves to elevate both of the planer heads 134 and 140 while the screw 112 serves to vertically adjust the larger planer head 140 independentlyof the head 134. This arrangement enables the work to be properly planed. Thus, for example, it might be required to remove an amount of stock from'the work which could not be cut away during a single passage of the work over one planer head. In such instances my improved arrangement enables an initial cut to be taken by the smaller -25 ,of the heads'to be employed for cutting Iva rious planer "-head and a final or finishing gcut -to be made by the larger planer head. By havlngithe planer heads so arranged that "the same may be raised'and-lowered as aunit, enables one setting sizes and types of moldings;-- I provide a pair of pressure bars 144 and 146 which-serve, in adto-thework. These irollers are vertically adjustable by means :of. suitable adjusting screwslfiil and 152. Interposed between the two upperrollers $148 :is a. pressure bar 149 which serves to en- .gage theupper surface of the work-and thereby prevent said work from breaking :in'response to the reverse bend imparted .byr the rollers 148.

After leaving the rollers 148 the .work is then passed through ..a sand-blasting device. indicated generally-bythe numeral 154. This sand-blasting device may *be of any conventional design which is adapted to receivethe molding or strip material and to cause said material to be subjectedto a sand-blasting operation; In most instancesthe embossing.diesareapplied in a heated :condition to the work and. in the event, that the work is scorched as aaresultgof theapplica- .tion of these hot dies, this ,sand blasting opera tion serves to remove such. unsightly scorches.

parent that my invention contemplatesthepro- -Sandb1asting the workserves to give the same a, satinized surface finishwhich is very attractive and Veryismooth; It vWilllcre apparent that sandeblasting the scorched surfacesconsiderably lightens the color :of :said surfaces and thereby causes the grain, of the .wood to. be; brought out.

This can be more readily observedby applying a coatof shellac to thescorched surface, of one piece and then applying a coat of shellac to a similar surface which :has been subjected to a sand-blastingoperation. A: comparison of the two pieces of wood will-show conclusively that my -improved method of sand-blastingthe wood surfaces not only causes said surfaces vto partake ofa satinized finish, but also facilitates the clarifying of the grain in the wood.

I will now proceed to explain .theimechanism for controlling the,operation of theapparatus just described. This control mechanism includes a control lever 156 which'is mounted upon and rotatable with the shaft'18. A link 158 is interposed between a slot 160'in the lever 156 and the outer end of an arm 162 which is secured to and rotatable with the shaft 20. Thus, when the lever occupies the position shown in Figures 1 to 3 inclusive, the eccentrics 28 and 30 will occupy the position as shown in Figure ,4 so as to retain the feed rolls and the bed frame which supports the same in an elevated position. To prevent these eccentrics from being tilted so as to vertically displace or lower said'fee'd rolls, I employ a clutching device indicated generally by the numeral 164, Figure 3. This clutching device includes a clutch member 166 which is secured to the side of the frame 12, and a companion clutch member 168 which is keyed to and slidable longitudinally of the shaft 18. The longitudinal movement of the clutch member 168 is controlled by an auxiliary lever handle 176 which is pivoted to the lever 156 at 172. The lower extremity of this auxiliary handle 170 is connected with the clutch member 168 by means of a rod 174. spring 176 is interposed between the clutch mem- 1 her 168 and the handle 156 so as to yieldingly urge saiduclutch lmernber .intooperative engagemerit with its companion member 166.- .IWhen theseeclutch members :166 and 168- are in.opera- .tive relation as :disclosed in- Figure 3, the-feed --rollsland bed frame 22 will be secured in ,ele-

vatedj position 5 because the eccentrics 28 and i 30 will be 'locked in position. Asecondlink 178 connectsthelower extremity of the control lever This shaft 182 also ally. connected'to a brake-shoe 192 which isadaptinto frictional engagement with a drive belt 196 and th'e'brake-shoe 192 will be positioned out of engagement .with the brake-drum 194. However,

'156'With'theupper end of an arm .180. whichis carried upon a shaft .182. .carries. an. arm Y184 and an arm 186. The ,outer extremityxof the arm 184carries an idler ld8land 'theouter gextremity.of the arm 186 is'connected toabrake-rod 190. This brake-rod 190'is-pivotv whenthe lever .156 is swung tothe leiit, Figural,

the idler isreleasedfromthebelt and the brakeshoe is carried into engagement with the drum so vas;to cause the. instantaneousv stopping :ofthe machine. The brake-drum 19.4 .is; connected to a series or .driving gears shown in Figures 2 and i4 and hence whenpthe brake-shoe is applied the actuation of the entire mechanismis immediateily arrested. I

From the foregoing description it will-heapvision. of a woodworking. machine which presents employed. in the operation of the .machine, power isappiied'from anyqsuitablelsourceto :a' .main. drive shaft 198 which carries ga'pluralityvof driving pulleys 206,. 282and264 as clearly shown infiguresl and 3. Rotation,isimpartedto the planer 'heads 1.34 and 1.40. by means of suitable belts. connected with the pulleys carried by the .drive shaft -'198.and.power is;-transmit ted to'the :feed rolls;36 through the agency of the :belt 196 which is interposed between a pulley. mounted 1 upon the brake-drumshaft and thepulleyaoo carriedlby' thedriveshaft, Thisarotation-is imparted to the feed rolls when the lever/156 moved to the right, in which-instance the idler 188 is moved into engagement with the belt l96 and the brake-shoe 192 is disengaged from the drum 194. The work is positioned beneath the friction roll 52 and is introduced between the first feed roll 36 and the embossing die 54. As the lever 56 is moved to the right, Figure 1, said first feed roll is elevated so'as to carry the work into engagement with the embossing die. The rotation of the feed roll causes the, work to be advanced from the position beneath the embossing die into a position between the pressurebar or frame 74 and the vertically adjustable straighteningroll '76. From this point the work is advanced into engagement with the subsequent feed rolls and beneath the rolls and 84. Then the work passes betweenthe side embossing dies 124 and is subsequently planed, first by the smaller planer head 134 and then by the larger head 140. Then the work passes between the threestraightening rollers 148 and is finally ade vanced through the sand-blasting mechanism 154. In some instances it may be desirable to embossing die 54 therewith. To accomplish this I provide an auxiliary operating handle or lever .to the embossing die 54.

mounted at the outer extremity of the shaft 56. Within this casing 208 is a suitable pawl and ratchet mechanism 210, Figure 5, which serves to enable the operator to impart an initial partial rotation to the shaft 56 and consequently By means of my improved woodworking apparatus worl: such as strips of molding and the like may be embossed withoutthe slightest pos sibility of the work becoming distorted or. bent. In other words, I provide improved straightening means which positively counteract any tendency for distortion which results from the engagement of the hot embossing die with the work. The feed rolls being provided with peripheral teeth or configurations, imbed themselves within the work so as to counteract the above mentioned bending tendency of the embossing die. By having the rolls and pressure bars mounted upon a unitary and vertically adjustable frame, I am able to produce a very practical arrangement. By means of this arrangement all of the super-structure may be removed when desired with a mini-' mum amount of effort on the part of an operator. The manner in which I employ a plurality of independently adjustable planer heads represents a decided improvement over woodworking devices which have heretofore been used- Treating the embossed molding to a sand-blasting operation completely removes any scorches and applies a very attractive, smooth, satinized finish to the product. The novel arrangement of the side embossing dies enables double as well as single moldings to be treated in a single operation and hence makes for acceleration in production. The improved control mechanism for actuating the frame bed which supports the feed rolls enables the machine to be instantaneously stopped and the work instantaneously released. It would also be noted that to facilitate access to the larger rotary planer 1 10, I pivotally mount a frame 212 which supports the rolls 148. This frame 212 is held uprightby' means of suitable bracket arms 214 and when it is desirable the bracket arms 214 may be detached and the frame 212 swung to the left, Figure 4, so as to expose the planar mechanism.

Having thus described my invention, what I 1 206 which extends outwardly froma casing 208 claim as new and desire tosecure by Letters Patent is:

1. In woodworking apparatus of the class described, an embossing die, means for feeding work tangentially of said die, and a sand-blasting mechanism positioned in the path of and adapted to receive work advanced from the embossing die so as to apply a satinized finish to the embossed work.

r The method offorming strips of wood such as molding material which consists in advancing the strip along a predetermined path, embossing the same during its advancement, and then applying a satinized finish to the embossed portion' of the strip.

3. The method of forming strips of wood such as molding material which consists in advancing the strip along a predetermined path, embossing said strip during its advancement, and then treating said embossed portion to a blast of sand so as to apply a' satinized finish to the strip.

4. The method of forming strips of wood such as molding material which consists in advancing a strip along a predetermined path, embossing said strip during its advancement by means of heat and pressure, and then treating said embossed portion with a blast of sand so as to remove sccrched portions and applying a satinized finish to the work.

5. The method of treating strips of wood such as moulding material which consists in advancing a strip along a predetermined path, embossing said strip during its advancement by feeding the strip past an embossing die, and contemporaneously subjecting the embossed strip to a blast of sand as it is moving in the above mentioned predetermined path.

6. The method of treating strips of wood such as moulding material which consists'in advancing a strip along a predetermined substantially hori zontal path against the underside of an embossing die, then against the surface of a side embossing die, and then subjecting the strip as it emerges from the side embossing die to a blast of sand so as to remove scorches which may be present on said strip, all of said steps being contemporaneously performed during the advancement of said strip.

WILLIAM H. FORSYTH.

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