US1305731A - Samtbiug-ma chiite - Google Patents

Description

K. F. G. MAIER. sANmNG MACHINE.A APPLICATION FILED AUG. |917.

IIIIII omen pszsns ca., #Humm To all whom it may @onces/nf Y mui?. donnine, oF'soUfrr-rnsHBuRNHAM, MASSACHUSETTS. o'

ases/Zai. Y i

lfBe/itflniown Vthat I, KARL F. lvl-Aminaoitizen of the .United States, residing atV South Ashburnham, county ofl /Vorcester,

'v andv State of VMassachusetts,Yhave. invented anl Improvement in Sanding-Machines, oi' wliichithe following description, in connectionlwith the `aceompanyingdrawings, is specification, l`ike-characters onthe difawin s representinglikepaits. Y v

he'invention to be hereinafterl described relatesfto sandingmachines, and more pai'- ticularly to that type of sanding, machines ortreatingthe curved surfacesot wooden strips. Y Y 'c An importantieature of the present in-V vention .consists a sandingl mach-ine vhav" inge-,sanding roll land azcurved table for supporting the Y curved strips, such for instance-waschairvbacks, as they arei'ed by suitable feeding means over the curved :sur-- tace ofthe table for thel action of the .sanding roll. Opposed tothe sand-ing rollin the presentiorln fot the invention isa pressure roll between which andthe sanding roll Ythe cunvedstrip to be treated-.is fed.

fA'nother featurevofthe invention consists infeedingmeans formed of flexible Vfeeding members, and means orfnioving the feed-1 ing members pathf'substantial-ly in ac-VV cord-ance with the curved surfaceo'f thetable 130.-;feedthe .curved strips over the tablev and between the sanding `and ypressure rolls.

A.Afuither objeetof the invention is to provide a sanding machine which shall be simple in ,constructioin andefiicient in operation-1 and wherein the. parts shall be actuated by power to etfetthe desired, surfaceA treatmentof curved strips; The above and other features of the inventionwill hereinafterrb more fullydesoribed inA connection with :the accompanying drawing which shows/one Y`good praeticalorm of. the inventiomthescope of which'is definitely set forthbyfthe claiins;v u f Y Y lnthe drawings: f Eigure lis aplan viewV of amaehine embedylngthe. present invention; i Y Y Y ztglfig. 2 isa fs'ectionvoj. he machine shown4 DF .igl O11 rJf1e111e;2Y.-,2,` Figf 1;# Y y Eig. 3isa detail on, an enlarged'seale, SHOW/,1111sv the relative ,ofthe guides for the flexible: feedingl members and the lcurved Serpentine table; andi. ,-i Fis 4 15;' teiln'an 'enlargedA Scaley Vsiiikm'ING-imioninn.:V v l,

ASiwcifiatin f I-ettersPatentY f Patentedv 511.11613, 1919.Y Applicatonrled August 30, 1917. YVSeriallo. v189,009. Y

showing one ofthe'l flexible `Vl'eeding members such 'iiexible members. Y

and one manner of securing ethe-'crossbars to` Thev machine framerinayr'be ofi-an'ylde-l` sired character and :as illustrated in: the

roll which may-be adjustablysupported inV its bearings. f Inthe present Vinstanoefof the. invention fthe sanding lroll consists. voifithe cylinder @having-an abrading surface 7A and secured to'atransverse shaftfS which may be supported `in vbearings mountedc on the side-frames: ofthe machine and "adjust-5 able by means ofthe adjusting screws 9 and 10., the construction beingVV suchY that' Y by. proper manipulation of the'iadjiisting screwsV 9 and 10, the sanding rollmaybe'movedior adjusted. on the supporting frame; Y 1 M'.Ihegpresent maehine isi-primarily intend',- ed for the surfaeetreatment ofcurvedstrips which. are to be; yi'ed Vto ,thev sanding roll.. :To thisend there is supported on the cross ties wrfin the present'instance of the invention, ai supporting table hailing a Y curved j suifiace which-.may be substantially inconformity With fthe curved surfaee of the stripsfjto be vrtieated.. 'In -the Y.presentinstantie otA MES ATENT f the invention,VY the tabl'eas va whole niay;

formed of two separate portions, one at each Y side oitfthe verticalplane passing through the .axis of the sandinfr roll. The two porf, tions of the table maytbe substantially alikel or, 4,modified as conditions require. In "the present instance ofthe invention, cachot the' curved portions of the vtable f consists lof a curved supporting surface l1 havingy ex-Al tending inwardlytherefroml the proj eetions 12 :whereby the two curved portions-of the table at each side of the sandingroll be, secured in operativerelation to the sanding. roll lby suitableA means such,-v for insta-nce, fas; thesecuring bolts 13. Theendsi of the twof portions of. thetable at .ea-ChA sideof the sand; ing,` `roll extend toward, the vertical plane3 passing through ,the exis 0f the sanding rollbut Stop shortthereof, .thusjeavngena cient space between the proximateends 14 for a portion of the sanding roll to extend between.

At the edge portions of the table, that is, at each side of the machine, there is provided a guideway 15 for flexible feeding members 16, one at each side of the machine, the general form of the guiding walls 15 and the face movement of the flexible members 16 being in substantial accordance with the curvature of the table. Extending between the flexible feeding members 16, which may be formed as sprocket chains, are the transverse bars or feeding members 17 These bars or members 17 maybe secured at each end to one of the flexible feeding members or chains 16 by any Vsuitable means, and as herein shown, the flexible feeding members or chains 416 have :formed at intervals, the plates 18, Fig. 4, which underlie the transverse bars 17 and may be secured thereto by the bolts 19. The particular form of securing means between the flexible feeding members and the transverse bars 17 Eis not an essential vfeature of the present invention, and 'may be varied within wide limits.

The transverse bars 17 aredisposed adistance apartalong theflexible feeding members16 to accommodate fthe curved strips 20 which are to be treated by the machine, and in order that the cross bars17 may not ride directly upon or inj`ure `the curved surface of the supporting table, the :guideways 15 for the flexible feeding members are raised a short distance above the surface of the feeding table as 'indicated at L21, the yconstruction being `such that as 'the flexible feeding members are "moved to feed Ithe strips 20 to the treatment of the sanding roll, the cross bars 1,-7 will ride closely adjacent to but preferably out 'of 'contact with the curved surface'of ythe table.

The sanding roll jmay -be appropriately driven vfrom any suitable source fof power, and in the present instance of the invention, the shaftV 8 on `which the sanding roll is mounted, is provided with a. belt pulley 22, Fig. 1, by which driving vpower may be transmitted'to the Ysanding roll, and its speed of rotation lfa'clju"sted to :suit the conditions of use.

The flexible feedinglinembers 16 for Yfeeding thecurved `'strips in the curved path as hereinbefore described, may be Vappropriately 'driven from any suitable source of power, and as herein indicated, the flexible feeding members orsprocket chains 16 are engaged with sprocket wheels 23 suitably mounted on a cross shaft 24 supported in bearings 'mounted on the machine frame. Secured to the shaft-24 is a pulley 25 lwhich, by means of a 'belt v26, maybe `driven from a pulley`27 which'de'rivesits motion by `suitable connections, as for instance, the pulley 28, with a suitable source of power.

it will be apparent that the sanding roll as well as the flexible feeding members and cross bars, are power-driven and that the longitudinal elements of the curved surface ofthe Vtable are substantially parallel to the axis of the sanding roll.

Rising from the side frames lof the machine are the pressure roll bearings 29, Fig. 2, in which is mounted the pressure roll 30 normally under the influence of springs 31 tending to move the Avpressure roll toward the sanding roll and acting under the yielding pressure of the springs, to yieldingly force the strips 20 toward the sanding roll as they pass between the sanding 4roll and pressure roll. If desired, suitable adjusting devices such as the hand-operated adjusting screws 32 may be employed for regulating the action of the .pressure roll.

In order that the leading ends vof the curved strips `to be treated may be properly presented to the sanding roll, it is'desirable that the leading ends of the stripsshall 'first engage the sanding roll before passing into control of the pressure roll, andto thisfend the axis of the pressure roll is located to one side of the vertical plane ypassing longitudinally through the axis fof fthe sanding roll. This is best indicated by ,'Fig. `2 Vwherein fthe line 33 represents the vertical Vplane passing longitudinally through the axisfof the sanding rollfand the line 34 represents the vertiral plane passing longitudinally through the axis of the pressure .'roll.

It may be desirable in some cases A to provide the cross bar 17 of the feeding means with devices to prevent vthe trailing len'ds of the curved strips-from rising with reference to Asaid cross bars; and to this end the -present invention provides a hold-down orlclip which may be secured to each of fthe fcr'oss bars 17. In the present instance, the Lholddown or lclip is indicatedlasa strip 35 lsecured to the top of each-ofthe cross bars 17 and having an overhanging portion 36 beneath which the trailing ends-of the-curved strips may be inserted.

In operation of the machine, the attendant lplaces the curvedstrips20 onthe talile 11 'at the feeding-in side o'f the machine, which as indicated by Fig. 2, is lat ithe right. The curved strips to be treated thus rest upon the ycurved surface1of-thetable and as the flexible feeding' :members carry the cross bars 17 along thecurved :path vcorresponding to the curvature of the table, they will engage the trailing ends fof `the curved strips and force ythe vcurved strips in the direction of feed-betweenthe `sand-- ing and pressure rolls, the curved Kstrips being removed from the machine rat the delivery or left-hand side viewing Fi) 2, either by the attendant or ypermittec -to automatically fall fromthe machine.

What is claimed is 1. In a machine of the class described, the combination of a curved table, a sanding roll extending through a portion of the curved table to act upon the Work as it is moved about, said curved table, means for rotating the sanding roll, a pressure roll opposed to the exposed portion of the sanding roll 'for pressing the Work toward the sand.- ing roll, iiexible feeding members movable in paths substantially corresponding to the curved surface of the curved table, and means extending between the feeding members for engaging curved strips placed upon the curved table and feeding them over the curved table and between the sanding pressure rolls.

2. In a machine for sanding curved strips, the combination of a horizontally supported sanding roll, a curved table the elements of Whose surface are substantially parallel to the axis of the sanding roll, a pressure roll opposed to the sandingY roll With its axis to one side of a vertical plane passing longitudinally through the axis of the sanding roll, and feeding means having clip portions adapted to overlie one end of strips placed upon the curved table and movable in a path substantially corresponding to the curved surface of the table.

3. In a machine of the character described, the combination of a curved table, a sanding roll to act on curved pieces as they are moved over the table, a yielding idle presserV member having a smooth surface opposed to the sanding roll for engaging and pressing the pieces toward the sanding roll, and means for engaging the trailing ends of the pieces and feeding the latter over the table-between the sanding roll and the presser member.

a. In a machine of the character described, the combination of a curved table, a sandingroll to act on the pieces as they are moved over the table, smooth presser means for idly engaging the pieces and pressing the same toward the sanding roll, and flexible feeding means having elements at intervals for engaging the trailing` ends of the pieces and feeding the same between the sanding roll and the presser means.

5. In a machine of the character described, the combination of a curved support,a sanding roll to act on one side of curved pieces as they are moved over said support, idle presser means for pressing the pieces toward the sanding roll, and flexible belts or chains having members connecting the same at intervals for engagement with the trailing ends of the pieces to positively feed the same over said support between the sanding roll and presser means.

In testimony whereof I have signed my name to this specification.

KARL F. G. MAIER.

copies of this patent may be obtained for ve cents each, by addressing` the Commissioner of Eatents, Washington, D. C.

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