US1827839A - Pencil sanding machine - Google Patents

Description

fist, 2Q, 1931. B, D R 1,827,839

PENCIL SANDING MACHINE Filed March 27, 1930 4 Sheets-Sheet 1 I nueritor A llorhcy 06L 1931- B. F. DERRYBERRY L ZBQ PENCIL SANDING MACHINE Filed March 27, 1930 4 Sheets-Sheet 2 l Invenlor V A ilomcy Get. 20,1931. 3 DERRYBERRY 1,827,839

PENCIL SANDING MACHINE Filed March 27. 1930 4 Sheets-Sheet 3 Invenlor I zrzwya A llorney Oct. 20, 1931. 48. F. DERRYBERRY 7,

PENCIL SANDING MACHINE Filed March 27, 1930 4 Sheets-Sheet 4 A llorney c i, acter described which will sand thGLPBIlGll the line8.'8 of Figure 7. V

I 25 reception ofthe paint. v

Fatentecl 0ct. 20,1931' I I i untrue m ee pmar orator:

Application filed March 27, 1930. Serial No. 439,371.

This invention relates to new and useful the line 2'2 of Figure 1 looking in the di improvements in pencil sanding machines rection indicated by the arrows. i and has for its primary object to provide in Figure 3 is a detail view in cross section a manner as hereinafter set forth, a machine showing a pair of rollerswhich feed the pen- ,v of this character embodying a construction oils to the sanding mechanism, I 55 U and arrangement of parts whereby the pen- -Figure 4 is a detail View in side elevation oils will be successively sanded with great of one of the pencil feeding rollers, rapidity in a manner to prepare same for the Figure 5 isa view illustrating the arrangesubsequent painting operation. mentjof the sanding beltand the pressure Another important object of the invenrollers which maintain saidbelt in engage- 6Q tion is to provide-a paper sanding machine ment with the sides of the pencil,

which is adapted to operate on pencils of Figure 6 is across sectional view showing hexagonal cross section and which further the means for actuatingthe device which conembodies a construction whereby two. diatrols the passage of the pencils from the hopmetrically oppositesides of the pencil will per, j r v V 1 o be sanded simultaneously. V Figure 7 is a detail view ,in elevation of Another important object of the invention the barrel through which the pencils pass is to provide, in a manner as hereinafter set when being sanded, I forth, a pencil sanding machine of the char- Figure 8 is a viewtakcn substantially on Figure 9is a crosssectional view taken sub-v longitudinally with the grain ofthe. wood instead of crosswise to said grain "as isdone stantially on'the; line 9-9.0f Figure 7 with sanding machines in use at present, thus Figure '10 is across sectional view takenpreparing a more satisfactorysurface for the substantially on the'line 10 10 of Figure 7 V. V a -Figure11 is a detail View in top plan-show- :5 Still another important object of the inmg the slidable follower which moves the vention is to provide a pencilsanding mapencilsfrom beneath the hopper to the feed chine embodying novel feeding mechanism rollers. which is positive and automatic in its action Figure 12 is a cross sectional .view taken in feeding the pencils from a supply hopper substantially on the line 1212 of Figure 1 so to the sanding operation. I looking in the direction indicated by the ar- Other objects of the invention are to proo s; an illustrating the sanding mechavide a pencil sanding machine of the charn II}, i acter set forth which will be simple in con- Y g 13 1S a fragmentary i 111 g struction, strong, durable, eifiOient i it e tudinal section showing the entrance end of 85 and which may be manufactured atlow cost. b r e i I c 'j All of the foregoing and still further 010- Ffgure 14.15 a detail longltudutal jects and advantages of the invention will sectionshowing the penc1lg111de wh1ch is 1nbecome apparent from a study of thefolterposed between the feed rollers, and the barrel. V lowmg t p takenfn W Figure 15 is. adetail view in cross-section the accompanymg drawlllgs Whemm hke through the follower taken substantially on characters of reference designate corresponds the line of Figure 1 1 mg Part throughout the several-vlewsrand Figure 16 is a cross sec tional view taken Wile/E111? i substantially on the line 16."1'6 of Figure l 95' f 1 1S aivlew 111 slde tl of a looking in the direction indicated, by. the pencil sanding machine constructed in acarrow H Y cordance With thi inv ti n, Figure 17 is aview in vertical longitudinal Figure 2 is a vertical cross sectional view. section showing the pencil supply and feed-c 7 so taken through the hopper substantially on ing mechanism, I 1

sec-

Figure 18 is'a view showing the driving chain, belt and sprocket for actuating the various elements comprised by this invention.

Referring to the drawings in detail and'to Figure 1 thereof in particular, it will be'seen that reference numeral 1 designates generally a supporting stand comprising the pairs of vertically disposed front and rear legs 2 and 3 respectively upon the upper end Of'Which is mounted a horizontally disposed rectangularframe which includes the longitudinal side bars 4 and 5.

Mounted onthe rear end portion Of th supportingframe between the side bars 4 and 5 is a base 6 provided with anintegral rearwardly directed extension 7. A groove 8 is formed longitudinally in the upper side of the base 6 and the extension 7 for slid-ably receiving the follower rod 9 which, as best seen in Figures 11 and 17, is mounted on one end portion of the cross head 10 of the bar 11 which in turn is mounted for reciprocatory movement longitudinally in the extension 7 on one side ofthe groove 8.

A guide rod 12 is mounted on the opposite end portion of the cross head 10 for sliding movement in the groove 13 formed in the extension 7 A coil spring 14 encircles the follower rod 9 and has one end impinged against the free-end of the extension 17 and its'opposite end impinged against the cross head and in a manner normally urge said cross headand the rodrea-rwardly.

A hopper comprising a pairofcomplemen-f tary front and rear vertically-disposed sections 15 and 16 is mounted on the base .6 and each ofsaid sections 15 and 16 comprises a substantially V-shaped side walls'17 havingthe integral downwardly converging mar- 'ginal flanges 18 communicating with the channel 19 formed in the integral extension 20, said passages 19 communicating with the groove or channel 8 in the base 6.

A-shaft 21 is mounted for rotation through the upper portions of .the extension 26 ,011 one side of the passages19 and fixed on the opposite end portion of said shaft 21' between the hopper sections 15 and 16 is a pair! of cams 22 which are adapted to control the passage of the pencils through the passages 19. The shaft 21projects forwardly from the hopper section 15 and has fixed thereon a drive pulley 23. v t

V Spaced, opposed, longitudinally extending plates 24 are mounted on the base .6 adjacent the forward side of the hopper section 15 and mounted for'rotation between saidpla-tes through the medium of the rotary shafts 25 which are journalled therethrough are' the pairs .of complementary feed rollers 26 and 27. )As best seen in Figures 3 and 4 of the drawings, each of the feed rollers comprises a disk 28 upon the periphery of which 'is mounted a rubber annulus 29 havinga polygin its periphery.

Theannuli 29 are formed'of soft rubber.

The feed rollers of each pair are spaced slightly'apart and are positioned to receive therebetween, the pencils from the channel 9 as saidpencils pass through the throat 31 in the lower end of thehopper section 15.. The shafts 25 have fixed on one end the meshed gears which are oper atively connected to a drive gear 33 fixed on one'end ofa shaft 34 having a worm 35 fixed on its opposite end portion.

Longitudinal strips 36 are mounted on the upper edges of the plates 24 in any suitable manner and mounted on said strip in longitudinally spaced relation of the blocks 37 which'support a pair of transversely extend.- ing bars 318 therebetween. A 1 brush '39 is secured between intermediate portions .of the bars 38 and depends therefrom for engagement with'the uppermost of the pairs of feed rollers 26 and 27 in a manner to keep said feed rollers clean.

As best illustrated-in Figures 1 and 14, a

4 and .5 of the supporting frame: at a point 7 forwardly of the guide 40 (see Figures. 1 and 12) ista substantially inverted: U-Jshaped bracket 46 having the depending arm portion 47' and 48 which rests ontop of the longitudinal bars 4ia-nd 5 respectively and a cross beam 49 is formed integrally with the de: pending arm portions '47 and 4.8 and extends therehtween adjacent the bars 4 and ,5.

Standards 50 are rigidly mounted on the bars 4and 5 in forwardly spaced relation to the bracket 46,. .It should he hereme t that the stand rds 0' are in stagg red relatio w th re pe t t Tether n he ba 4 and A arm 5, ext nds upw rd y o the standard v-ll nthe ar 4 a d a sha t 52 is mounted b t said a m 5 an t e bracket 46 or rot tion andhas fixed the e n apulley 53.

Theshaft '52 extends forwardly through the bracket 46 and has fixed thereon a sprocket 54. Depending fromt'hebar 5 of the supporting frame isa pair of curved arms 55 between the free ends of which is mounted for rotation a pulley 56. Brackets '57 are mounted on the bars 4 and "5 in staggered relation with respect to each other and opposite to the standard-50 and beams (not-shown) idenltical in construction to the beams=49 of ,the

brackets 46 extend between said 'standardsf5O and the brackets57.'*-

An arm 58 extends upwardlyfrom the for ,ward end portion, of the bar of the support- 5 ing frame and a shaft 59 extends between said arms and the brackets 46 for rotation and has fixed on its forward end portion a large sprocket gear 60 and a comparatively small sprocket gear 61.

A pulley 62 is fixed on the forward end portion of the shaft 59 adjacent the arm 58. A pair of depending arms 63 extend down wardly and inwardly from the bar 4 ofthe supporting frame and rotatably mounted *therebetween isthe pulley 64.

A beam (not shown) similar to the beam 49 also extends from the lower end portion of the arm 58 for rest on the beam 4. Pulleys A 65 and 66 are mounted for rotation on the I at bars 4 and 5 respectively. The beam 49 and all of the transverse beams which are similar thereto is provided-With an intermediate circular enlargement 67 provided with a rectangular opening through which extends the elongated barrel 68 having a hexagonal bore 69 extending longitudinally therethroughk The entrance end of the bore 69 is flared'as indicated at 7 0 (see Figure 13) and in hori- I zont-al alinement with the bores 45 in guide 3 0 40. As clearly illustrated in Figures 7 to 10 inclusive of the drawings, the sides of the barrel 68 are provided with longitudinally extending recesses which communicate with 7 diametrically opposite sides ofthe bore 69 at different points in the barrel and in a manner to successively expose the opposite sides of the pencil 71 which is passing therethrough. Endless sanding belts 72 are trained over the pulleys 53 and 56, the pulleys 62 and 64 and the pulleys 65 and 66.

Both flights of each of the endless standing belts are maintained in engagement with the exposed sides of the pencils which are i passing through the barrel 68 through the medium of the rollers 73 which, if desired,

may be spring pressed.

A pan 74 ismounted on the forward end of the supporting frame 1 to receive the-standard pencil from the discharge end of the barrel 68. Suction pipes 69 are associated with the standing belts 72 to convey dust therefrom.

An electric motor 76 is mounted on a support 77 secured to the leg 2 of the frame 1 and said motor drives an endless belt 78 trained over a large pulley wheel 7 9 supported for retation in the arm 80 which projects forwardly from the leg 3 of the supporting frame 1. The pulley 7 9 drives a shaft81 which extends ce transversely beneath and has fixed thereon a pulley 82 over which extends an endless belt 83 which drives a'pulley 84 fixed on a shaft 85 mounted for rotation in the bracket 86 which depends from the rear end of the 65 base 6.

ve io as'cl m -z- 1 .l l avingfthus described the, invention what I 3A disk'87 is' fix'ed on the shaft 85for rotationtherewith and has eccentrically secured thereto a connecting rod 88-which is v,operatively conneeted-to thecross' head 10 for re ciprocati'ng the follower rod 9.

Also fixed on' the shaft 81 1sasprocket89 over which-is} trained a sprocket chain 90 which is operatively connected to the shaft 91 i I The shaft 91" drives the pulley 23 and the shaft 21 of the.

inf a 'manner to rotate same.

feed regulatorthrough the mediumof the v pulley 92 a-nd the belt 93. The shaft91 is also operatively connected to the stub shaft 94 mounted in the depending arm 95 through the medium of the sprocket fch'ain 96yand the shaft 94 drives the large gear 60 through the medium of the sprocket chain97.

A tightener 98 is provided for operative engagement withthe'chain 97. An endless chain 99 is operatively connected to the shafts uponwhichthe pulleys 53, 62 and 66are fixed,

said chain 99 deriving its-power from the sprocket 61 on the shaft 59 upon which'the large gear 60 is mounted andin this manner each of the standing bolts 72 is actuated. 7

fed on'eat a time in rapid succession into the channel 8' and the follower rod 9 pushes each pencil between the-pairs of rollers 26 and 27 which inlturn feed same through the guide 40 into the'barrel'68. Each su'cceeding pencil pushes the preceding pencil through the barrel. 5 r Y The endles's'sanding' belt moves very slowly owing to'the reduction gearing by which same 90 In use, the pencils"fron'1-thehopper are aredriven but the pencils travel through the barrel at; great speed with the result that sanding operation is longitudinal with the grain of the wood of said pencilv andnot transversely thereto.

Y As'will 'bereadily apparent, each'of'the belts 72 is adapted to sand two sides of the pencil 'simultaneouslyas said pencil passes through the barrel. I v It-isbelieved that the many advantagesof a-pencil sanding machine constructed 1n accordance with thisinvention will bereadily understood; and although the. preferred em bodiment of the invention is asillustrated and; described, it. is i to be understood. 1 that changes in the details of; construction may be had which will fall within the scope of the in-'- claimas new is:

. pencil sanding machine of the charac ter descr bed comprising, 1n combinatloma supporting stand, an elongated barrel mount edon the stand having bore therein for the c v passes through the barrel, means for driving 7 able; in the. other rqoveme ns for reciprothe pencil through the barrel, pairsot supeating the cross head andmeans for actuat- V with the exposed portions of the pencil in porting, members on the" stand, shafts mounte ing the feed rollers. a V I testimonywhereo'fl atfix my signature. j BEN F. DERRYBERRY.

ed between the pairs of supporting members and disposed in pairs in transversealignment with the pairs of openings in the barrel, a sprocket gear fix'edwon one end portion of one shaft of each pair, an endless chain. trained over the sprocket gears, another sprocket gear fixed, on one of said one shafts, a chain trained over the lastnamed sprocket gear for connecting same to asource of power, a pair of pulleys operatively mounted on theshafts, and endless sanding belts trained overthe pairs? of pulleys and operatively engageable the barrel. v I g 2. 'A pencil sanding machine of the character described comprisingasupportingstand,

pencils, sanding belts engageble with the pen-s oils in the barrel, means for driving the belts, a supply hopper mounted on the stand, feed an elongated barrel mountedion the stand having a bore therein for the, passage ofthe ing means mounted on the stand and spaced from the barrel for receiving the pencils from the hopper and driving said pencils through the barrel, means for driving the feeding means, and .a guide disposed between the feeding means and the barrel, said guide includinga pair of spaced, opposed, upstanding arms and a connecting base portioma neck projecting laterally'from one of the arms, said neck and the arms being provided with aligned bo-res for the passage ot the pencils,,,said bores being aligned with the bore. of-the barrel and having theirintake end portion flared for guiding 'thepencils thereinto. r

ter described comprising a supporting stand, a barrel mounted on the stand having a bore therein for thepassage of the pencils, sanding belts mounted on the stand toroperative; j engagement with the pencils in thebarr'el,

. means for actuating the sanding" belts, and

means for feeding pencils to the barrel, the last named means including a base mounted on the stand, an extension formed integrally on the base, said base and the extension hav-' ing a pair of parallel, longitudinal grooves their upper side, a bar slidable on the-base and the extension between the grooves-and projecting from the free end of the extension, a cross head on the outer end of the bar, a

hopper, for the reception of the pencils,

mounted on the base above one of the grooves for depositing the pencils; therein,"pairs of opposed feed rollers disposed between the hopper and the barrel, a follower fixed on one end portion of the cross head and slidable in said one groove for moving the pencils a): ward thefeed rollers, a guide rod fixed on the other end portion of the cross head and slid- 3. A pencil sanding machine oi the charac

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