US1551167A - Band knife sharpener - Google Patents

Description

Aug. 25, 192,5. 1,551,167

E. M. oRLow BAND KNIFE SHARPENER Filed Nov. l5, 1924 3 Sheets-Sheet 3 Patented Aug. 25, 1925. i

gimr'em offeree e ERNEST Mi foRLovv, OF'MILWAUKEE, Wisconsin, Asseironfor' onrtrriehr'r ARTHUR i y y".JJsomvrrrr;oF'MrLWAU'KEE WsooNsIN. n f

e band knife infthe cutting of Clothes .Where e` rsteokrof` cloth; is lflpe'ssed over le ftable through which' i the rapidlyV moving,l 'bund pesses. Thesewettemptsfheve not been wholly satisfactory for the reason,thatngreatdifheulty was experienced` in lLsharpening the f fwvitlroutbinding, tearing ori YWedging.

This invention isdesi'gnedtofoverdoinelthe above noted defects, and objects :offsuehV in* vention are @to provider wfbrnd. knife''sherpener' which` will `correctlyy sharpen thel oiitting Vedgeuof the vbundnknife V'in ai manner `tol z purtifculzirly adept. iii for the f cutting of. cloth 4or similar muterialyvvhieh Fis '-so'v .mounted :that fito-may be=left permanently fin place `if desired; Without interfering With the norrnal "operation of the-bend knife, andy Which `is ofeoinpeot'design. w f

v-rFurtherobjeotsf"are: to providea` band knife shzn'r'pener in which both sidesrof the knife' muy be simultaneously ishe-rpelied in e `unifornr` ando even; mnner, Ain `v'vliieh Aprovision kis mede Afor adjusting thewfgrindng `Wheels in `reference toithe knifenenyde Esirecl' manner;` und "in which zu Very accurate sharpening muy bef readily lsecured.

An'er'nbodimentofV the invention isA shown `in the accompanying drawings, `in which:

Figure 1 is a front elevutionfofeeband knife machine showing fthe.: Sharpener in place.v

L Figure 2 is a` horizontel'seetionel vieWA on theline 242 of'Figure 1.

F-'gure Sis unelevation ofoneof` the eleotrio motors shovvingfin seetionf-themounting thereof.

`and State 'of `Wise`onsing lieve invented lcer- "tain new undusefulf Improvements in'FBand "such iltable,` 'fhoWever5 being *of fairly f Fdesired I Figure4-fis eiflrear-view ofithefstructure shownjin Figure 3.

`Figure 5`is eview-ofthesupporting plete.V

for the motor mounting.

Figure 6 f is zurl enlarged"""digrarnrnetio fvievvl showing *the relative#"positionl `'offthe bendl knife and one :ofthe grinding" Wheels. 4'.llhrel mem machine 1sy Iprovidedi* Within` en endless bandV knife l Whiohfis adapted to travel! through a slotiinf aisupportingtable,E

'two` identical Afunits eohof Awhich lcomprises y Spend' 5) and this Esu'ppc'irting"plate `is "prefing reenforeing flange 8 to enhancel its rigidity. "Itfis'ulso equipped'witlr a'puir of-iun- `gulztrly eirenged-jsl'ots 9 esgshowninwFig. ure 5;' for purpose liereinzfteri to rappeur. This supporting plete carries a hinge'like structure consisting 'of e bottom :plete or leef lO'fandi an upperI "leef 11E jinedw by means of a piritlefpin '12 :idjeoentftheufory Ward: end infproximity to Athe bundknife- 1, :as shown/in Figures l and fThe:bottoni `memb'erflO is secured yby:1ne:1ns'c)fbolts 13 to the'supportinglplate 7521s shownfin Figlure"-3,-suoli boltsy passing through theislztnt? Iing slots 9 -to provide 'zndj ust'ment 'hereinafter described in greater detail. Thenremberflfl is provided Withenzeyelet portion lil-Which vreceives wpiiitle pin l5, such pinpessing through* a centrally loo'ated eyelet y'portion 16 of'anfndjusting screwl L17. y f" The` screw 17 :(see Figure through u" slot l8rV in the `memberv10? f and is --heldf invits 4edjustediposition bymeens of nuts 19- loeutedeboveend below the plate 10. The-'member 11A is `l-provided Withaup standing Vthreaded Alugs f2() `(see FigureA 3) 3') passes l0 Yun foutiverdlyf'extending supporting larme Y l which lsfprovlded Withen apertured eollar un edge"A 'Whioh' effectively fsevers `Athe` y'eloth described, in detail, but inasmuch as they through which an elongated threaded screw 21 passes, such screw being provided Vwith a rigidly attached collar 22 intermediate its ends and with a manipulating crank or hand bar 23 at'its outer end.

An electric motor 24 or other suitable type of motor is `adjustably carried upon the plate 11. This motor is provided/with outwardly Haringifeet or supports 25 which slide between guides 26 carried by the plate 11 (see F igure`4). The motor is further provided with downwardly extending lugs 27 (see Figure 3) which are positioned on opposite sides of thevcollar 22 and bymeans of which Lthe longitudinal adjustment of the motor maybe made.'` The motor. has its driving shaft 28 extended outwardly and such driving shaft carries' a grinding wheel 29 at its outer., end.` One only ofthe grinding units has been ,are identical, Vas shownin Figures 1 and 2, such description will be sufficient. It is to be noted, however, that they are mounted upon opposite sides vof the band knife 1 and n are mounted one above the other, as clearly shown in AFigure 1. Y I t In adjusting the device, the arms 4 are i rocked about the standard 3 until the desired anglev required for thebevel on the front edge of lthe knife 1 is secured. Thereafter, the angularirelation between'the plates 10 and 11 is secured by suitably adjusting the nuts 19 (see Figures land 3) to thus adjust the anglebetween the face of the grinding wheels and the blade or knife.

Thereafter the correct adjustment'axially of the motors is secured by means of the elongated screws V21. Preferably, however, the band knife is run in the usual manner, the portion illustrated in` Figure 1 being the descendingV portion. Thereafter, the grinding wheels Iare movedj anto contact with the band knife andsharpening takes place. n L

It is to be noted particularly from Figure 6, that the band knife is preferably set at avright angle to a vertical line. It is, therefore, apparent that when the arms 4 are elevated or lowered along the standard 3 that a further adjustment is required to maintain the relative relation between the grinding wheels andthe bevel faces 30 of the band knife 1. Thisis secured by means of the slanting slots 9 which permit a bodily shifting motion to be given to the support for the motors, the bolts 13 being loosened during this operation. Thereafter, the bolts are tightened and the motors, together with their grinding wheels have their correct relative position tothe knife 1.

It is tobe noted .particularly from reference to Figure 6 that the portion ofthe grinding wheels 29 which contact with the bevel faces 30 of the knife are traveling up- ,limited only as claimed.

wardlyl and rearwardly. Also it is to be noted that the band knife 1 is traveling downwardly at this point. It is, therefore, apparent that a. multitude of angularly set microscopic teeth will be formed at the eX- treme outer edge of the bevel faces y30 of the knife. As shown in Figure 6,v the path traced out on the bevel faces by any point on the grindinguwheel will extendupwardly and ,rearwardly along a slanting line,`such as indicated roughly by the lines 31 in'Figure 6. However, it is to be distinctly understood that the teeth formed on the beveled edge are microscopic teeth and the lines 31 are shown for illustrative Vpurposes only to more clearly bring Jout this feature. It has been found in actual practice that vthis -mode of sharpening the* knife produces vthese slanting microscopic teeth which will` saw through the fiber ofthe cloth in a highly effective manner, and which will permit the use of the band-knifein cutting large stacks be'permanently left inpositionl on the machine without interfering with the normal operation. l

Although the invention has been described in considerable` detail, it is to be understood that the invention may riously embodied andxis, therefore, to be I claim: v 1. The combinationo-f a band knife, a standard locatedadjacent said knife, ay pair -of arms .adjustably carried by saidl standard, a pair of motors adjustably carried by said arms, fand grinding wheels operated by said motors and located upon opposite sides of said band knifey on the descending side thereof, lthe upwardly andrearwardly traveling portions of saidgrinding wheels contacting with said knife, said grinding wheels being set one above the other.

2. The combination ofa band knife, a standard located adjacent. thel downwardly traveling portion of said knife, a pair of arms carried by said standards. and having rocking and vertical adjustment upon vsaid standard, apairof electric motors pivotally related to said arms and adapted to rock about horizontal axes, means for adjusting the angular setting of motors `relatively to said arms, means for moving said-motors towards and from said band knife, said motors having driving shafts, and a pair of grinding wheels carried by said driving shafts and located upon opposite sides of the forward edge of said band knife.

3. The combination of a band knife, a

be va- Cil standard looated adjacent said knife, a pair of arms carried by said standard, a pair of moto-rs adjustably carried by said arms, and grinding wheels operated by Said motors and located upon opposite sides 0f said band knife on the descending side thereof', the upwardly and rearwardly traveling portions of said grinding wheels contacting with said knife, said grinding wheels beingl set one above the other.

In testimony that I elairn the vforegoing I have hereunto set my hand at Milwaukee, in the county of Milwaukee and State of Visoonsin. 4

ERNEST M. oBLoW.

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