US1638664A - Veneer-taping machine - Google Patents

Description

Aug. 9 1927.

1,638,664 H. G. GREENFIELD VENEER TAPI NG MACHINE Filed Oct. 1l, 1926 2 sheets-sheet 1 fg. E

wImm" Aug. 9 l1927. l H. G. GREENFIELD VENEER TAPING MACHINE Filed oct. 11. 192e 2 Sheets-Sheet` 2 atroz ne* Patented Aug. 9, 1927.

y Uri'y HUGH G. GREENFIELD, OF TAGOIVIA, WASHINGTON, ASSIGNOR OF ONE-HALF TO VARIETY MACHINERY COMPANY, F TACOMA, WASHINGTON, A COBPORATIONOF y WAsHINGJroN. Y Y

vENnnR-TAriNG MACHINE@ Application med october i1, i926.- seriai ivo.'14o,774.

This invention relates to-machiies (for ap plyin@ a strip of paper tape to te e ges o venecia' sheets and has for its objects, first, to provide means whereby the length of time Y elapsed between the wettingV of the guinmed surface of the paper tape and its application to the sheet/of veneeris substantially con- I' tape; and

stant independent of the speed of feed of the veneer through the machine; second, to provide means whereby the said elapsed time may be adjusted to suit varying conditions of atmospheric humidity and temperature, or for varying conditions of, or lrinds 0r brands ofr taper; third, to provide means whereby the speed of the yveneer fed through the machine may be easily and quickly changed, thereby enabling the operator to run all lengths and grades of veneer through the machine without having to stop the machine to shift his belt from one pulley to another and without having to manually change thepathof the tape from the water bath to the veneer in order to alter the length of exposed wet fourth, to provide means whereby the wet tape may be guided to one side of the center of the feed mechanism thereby adapting, it for taping Y the edges of sheets of veneer.

i I attain these and: other objects bythe devices, mechanisms, and arrangements illus-t` trated in the accompanying drawings, in whichy,

Fig. l is a side elevation o f my improved machine; Fig. 2 is a plan view of the tape guiding means'for taping the ends Ofsheets of veneer; Fig.I 3 is a horizontal section on the line 3--3 in Fig. 4; ligj lis a front elevation of `a portion ofthe tapingmachine and Fig. 5 is a section ofthe variable speed drive of the Vtaping machine, showing the belt shifting means mounted thereon.

. Similar numerals of reference refer to similar' parts throughout the several views.

t is well known practice, in workin-g with very thin sheets of veneer, to apply a strip of paper tape to the edges of the sheet, or to apply asimilar strip of tape to both adjacent edges of two sheets of veneer. machine is ,adapted to` applyV the tape in either way by applying or removinga part thereof to cause'the tape to be runeither to .one side of the center or yon the center, as i the case may be.` The speed at which the Asheets of veneer may fedy through the This machine depends partly ontheir size, their dryness and their distortion. .It hasbeen customary'` to change the vspeed ofthe feed f by stoppingV the., machine andl lshifting the beltv to different size pulleys thereby either stepping'it up or down. Ioovercomethis waste of time and llabor I have provided a means of .shifting the speed bygradual change from one speed to kanother by simply turning a crank handle. fr lVhen the gummed surface of the paper tape has been moistened, a certain definite f time should elapse'before it is applied to the woodveneer, Vin order to give the moisture, which has been spread.l on its outer surface, time to penetrate into the,v gum `material and suitably soften it. Sinc'e'the rate of feed of theftape is necessarily exactly' l equal to that of the veneer it isevident that, unless special provision is made, the tape will occupy less time in passing yfrom the water bath to the veneer if the veneer feed is fast than it will if the feed is slow, and that is a'. fact that the tapemust not be allowed therefore,v the moisturewill have less time to penetrate and soften the gum. Also, `it

to stay moistlany longer than is absolutely necessary'to soften the gum, and therefore y it is not, a sufficient solution of the problem to cause the tape to pass throughv a per' manently long course because, though 'such a course Vmight be sufcient when the speed is fast, it ywill probablylbe much too long trol, lwhereby the length ofthe course lof the tape from the water` bath tothe veneer is substantially proportionate kto the speed when Athe speed is slow. I have therefore provided ya means, tied upjto the feedy con?,V

of feed of the veneer and therefore the elapsed time of exposure ofthe moist tape is substantially constant.

However,V it is also a well ltnown factethatx the atmospheric conditioncf the room has la sti'ongreifect on the' moist tape in that, if the air be dry or warm,'the moist tape should notibev exposed for as long a time as when Vit isr cool or moist. Also `the kind of gum, the age of the tape, the kindof i tape, and many other variable conditionsl make it desirable to*{providef a different length of exposed moist tape forthe same rates ofyfeed.y Since these` conditions only var-y slightlyv and require adjustment at comparatively long intervals I have provided a Y.

Ll" y Vmeanswhereby the course traveled by the tape maybe-manually adjusted to suit the `particularconditions as above outlined.

Referring now to the drawings, it will be seen-thatdniy' inachineconiprises a frame p1., having a horizontal table 2,V adapted to support the veneer to be taped, and an arm 3,'

extending over the center of the table 2 and carrying the taping apparatus on' aAv head 4. A feed roller Y5 is mounted below,and-eX-l `tends'up through the table 2 and is adapted to engage the lower side of the veneerpsheet and to causerit to travel onthe vtable and'underthe taping apparatus.` A pressure roller Glis'inountedlin the head 4 and engages the upper side'of the veneer'sheet and applies thelmo'ist tape thereto. The 'feed roller' 5 'is fo intermediate gears, or otherwise, from a.

i 5 rdriven by a 'shaft' 7, and-the pressurevroller 6 Vis driven by the shaft f 8. 'Both these shafts 7 and 8 arel driven, through `suitable variable-speed drive vmechanism one forin of A which is illustrated herein and comprises the conev ulley9, drivenlby the belt 10 `from a comp einentaryf driving cone pulley 11, which rotates at a const-ant speed"- The belt I f1() is adapted to be placed in any position on Vthe pulleys" 9 and V11 and therefore the peripheral speed of the" feedfroller 5 and the jii'ressure roller 6 may be changed shifting the belt from one position toV another. The Iabove inethodof obtaining a variable speed from ay constant driveV is one form ofniany ksuchknown drives, any one of which may be used in this `machine if they are adaptedj thereto. Y

1 In vthe form of spe-edV control, illustrated herein, I inount a horizontal shaft 12 on the upper frame arm-3 and rotate it by means of v-aipairof miter gears 113 and by'rthe hand wheel; 14 andthe crank liandlel.v A vertical shaft 16 is mounted at the rear ofthe 'machine and is driven by the shaft 12 by niejahs of the pair ofbevel gears 17. A horizontal screw-threaded'shaftlS is mounted edu'idi'stant from and parallel with the axes ofthe two cone pulleys 9 andll 'and is driven I frointhe vertical shaft 16 by aV pair of bevel gears r19. A Y y j parallel ywith' the shaft 18 (Fig. A belt shifting'carriage isinounted on the `rod 20 and `on the shaft 18 and has a nut 22 enguide rodw'20 is mounted gaging the threads of the said shaftlS.

the said carriage 21.v 'l

Thev belt 10 passesv through two holes 23 vvin handvvheel14, theshafts 12, 16 and 18 are rotated and thecarriage 21' is shifted along the shaft 18 and the-rod '20 and shifts the -beltf y10 on'v the complementary. cone pulleys Qand 11;

. `Referring particularly toy Fig. 4, it Will seen that'the roll of tape 24`is mounted onvk an'arni 25 extending horizontally froina verticalfraine26 attached to the head 4 on the end of the upper arin 3 ofthe frame. The

hus, yby rotating the.

usual water bath 27 is mounted below the said arm and is provided with aser-ies of suitable guiderollers 28"and wetting rollers 29 mounted therein and adapted to support aiidguide the paper tapetherethrough.

j A variable-course tape-guiding mechanism is provided and comprises a `vertical'screwthreaded shaft 30, mouiited'in the said ver'- tical frame 26, and is driven by the abovedescribed horizontal control shaft 12 thro-ugh the bevel gears 31. A nut 32 engages the'.

screwshaft (Fig. 3:) and is kept Vfrom turning therewith but is free vto Vtravel verticatlly thereon in the said fraine26.v A Vpiny l33e-passes out from the nut 32 and is provided with screw-threads and with a wingV nut 34. A vertical plate 35 is provided with Aa longitudinal'slot 36 and the Wingnut 34 clain-psthe plate 35, in anyjadjusted position,

`to thenut 32. A guide roller 37 is' `mounted for onY one end of the *platel o.) and, is inline with the guide rollers 28 on the water bath, and

is in the central axis of theveii-eer'feed. vIt' to vbe applied to the veneer; therefore, as

the roller 37 is raised or'flowered, the length fof tape between the water bath and the veneer isl Ylengtheiied Vor shortened vby substantially double .the amount of 'movement of thenut 32 in the frame 2o. The apparatus is ar- 'feedfis increased the length'of exposed tape ranged so Vthat as the speed of the veneer between the water bath and the veneeris substantially proportionately increased.

Also, .it will be seen, that the actual length of yexposed moist tape between the water bath 27 and the veneer may be periodically adjusted loosening the wing nut 34 Y'on the pin l33 and sliding theV 'platef35' up or down over the said pin, and then clamping it thereto by' tightening the said wingrv nut t. y

34 again;` Also, in extreniecases, it'will beV seen thattheentire plate 35 may be reversed from the pOsitioii, shown in the draw-ings,

bringingthe roller 137 yto its upper end, insteadof its lower end 'as shown, and vthereby permitting a4 much longer time to elapse be- I' tween the inoistening and! applying of the tape than would ber possible when placed as shown, -such position being used when the vveneer is being fed through at a hightrate but Athe guniined tape reouires an eXtra long time to become suitably softenec. f

When it is desired to apply the tape to i theiedge of a v.sheet of veneer the tapev 24 is led over a series of inclined adjustable rollers which divert it rfrom the central `line of Y the veneer feed( Figs. 1,2 and 4). A bar 38 is removably and iadjustabl'y secured to the upper side of the-table 2 by thumb-screws 39 vwhich pass through transverse slots in the said bar 38 and vscrew into the said table 2,

thus permitting a limited transverse'adjust.- ment of the bar 38 on the tablek An arm 40 extends from the bar 38 and carries a vertical pin 4l, which is bent at right-angles at its end, and carries a horizontal guide roller vand carries a guide roller 46 thereon. The

pin 45 is clamped to the arm 44 by means of a thumb-screw 47 and therefore the roller 46 may be adjusted in distance from the other pin 41 and in verticalangle (Fig. 4). The tape 24 is therefore led from the water bath 27 over the length adjusting'roller 37, thenV it is led in an inclined downward and rearward direction and is slightly twisted (Fig. 4) and passes over the guide roller 42, which is setat an angle to the direction of travel of the veneer, thence it is lled forward'and linclined laterally (Fig. 2) and slightly twisted ig. 4) and passes under the vertically inclined roller 46 and is thus displaced laterally from the central line of the feed but is parallel thereto, and passes thence under the pressure roller V6, which applies it to the veneer.y A,

Thus it will be seen that the manuallyoperated control mechanism connects the Variable-speed. drive mechanismrto the variable-course tape-guiding mechanism in such a manner that when the operator of my ma. chine changes the speed of the veneer feed he also changes thelength of the exposed moist tape in acccordanceV with the changes in the speed of the veneer feed. The machine also guides the tape to Yone side of the central line of the feed and is therefore adapted to apply the tape to the edge of single sheets of venecia, In case it is desired to tape the edges of two sheets together, then the bar 38 is removed, by unscrewing the thumb screws 39, and the tape is led directly from the adjusting roller 37 to the pressure roller 6, along the center line of the feed of the machine.

It is evident that many variations may be made in tlie several parts of this machine without departing from the' principles involved therein, for instance, practically any of the various well known variable-speed mechanisms maybe substituted for the corresponding mechanism illustrated and described herein. Y

Having therefore described my invention,

what I claim is j l'. In a 'veneer taping machine, the combi- Anation with a veneer feedmechanism; a4 lvariable-speed drive Vmechanism a variablecourse tape-guiding mechanism; and manually-operated rmeans connecting said vari able-speed drive mechanism to said variablecourse tape-guiding mechanism, whereby the l length of exposed moist tape is increasedfas the speed is increased to render the time of exposure of the moist tapesubstantiallyuniform.v .Y Y

2. In a veneer taping machine, the combination with a veneer feed mechanism; a variable-speed drive mechanism; a variable-- course tape-guiding mechanism; adjustable means in said variable-course tape-'guiding mechanism, whereby the length of the course son.,

may be ladjusted independent of saidvari- 7 able-course tape-guiding mechanism; andl manually-operated means connecting said variable-speed drivemechanism to said variable-course tape-guiding mechanism whereby the said adjusted lengthof exposed moist tape is increased as the speed is increased" 90 to render the time of exposurerof the moist tape substantially uniform.

3. In a veneer ytaping machine, the combiy nation with a'veneer kfeed mechanism; a tape-guidin g and lmoistening means'adapted to feed the tape in the central axis'v ofthe veneer feed; a guide roller mounted in the central axis of the veneer feed andf having its axis lying in a horizontal plane but at Vless than right-angles to the direction of the veneer feed and adapted to receivethe tape from the tape guiding means andto divert it from the central axis to'an angular course; anda second guide roller mounted toone side of said central axis of the veneen feed and adapted to receive the tape in its angular course and to divert it into alaterj vally displaced but parallel ycourse to said central axis of veneer feed'.

4.v In a veneer taping machine, the combination with a veneer feed mechanism; a tape guiding and moisteningV means adapted to feed the tape. in the central axis of ,the

veneer feed; a horizontally-rotatably-adjustable guide roller mounted in saidV central axis ofy veneer feed and adapted to receivev the tape from thetape guiding means and.

to divert it from the central axis to an angular course; and a verticallyerotatably-adjustable guide roller mounted to one side of the said` central axis of the veneer feed and adapted toy receive the tape in its vangular course andto divert it into a laterallyolisplaced but parallell course to said central f axis of veneer feed'. l

HUGH G. GREENFIELD.

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