US1331596A - Sharpener for slicing-machines - Google Patents

Description

H. ST SHARPENER FOR SLICING MACHXNES.

-UKAM- Patented Ffab. 2%, 1920.

APPLICATION FILED JULY l0. 1916.

STUKART. SHARPENER FOR SLICING MACHINES.

3 SH rTS--SHEET 2.

aten'ed Feb. 2%, i920.

APPUCATION FILED JULY l0, i916.

gmk

3 SHEETS-SHEET 3.

I I II ildill I Patented Fb. 2%, 1920.

STUK/IRT. SHAHPENER FOR SLICING MACHINES.

APPLICATION FILED IULYVIO, I9I6.

f @ma Application zf'led July l0,

Imm may concer-n: 't known il :il: l', HENDRIK STUKAM, z:- of the u@neen oi' Holland, residing te, in the county oflnipore and Simile of indiane, here inrened certain new incl useful improvements in Sharpeners for Siieing-lilaciiines, ef which the iioliowing is Speeieation This invenliiem relates to mechanism: for sharpening the slicingI knives of machines used for slicii l' .ii-nii other nmeriul, Wliirli is ore-iii1M inte iliin slieen before being d ieiieiisecl to 'ille -r:i le

The object iiieinveniion ie 'io provide. mechanism of the here/@eer nenied which iii be of improved eonetrnction and elli A cie-,n 1n operati The, invention exempined in the conininniion :1nd arr: ngement im. shown iie :ieeonipen ing drawin nie following' specifi is mais, Ami describe and it 1,9 more pnrienlarly peiniefl "iden Claims.

E U ."1 .i "ii" 1 J v. A' 'l An ine innige, ignie i 1: :i willem Seelonei View :Ellrongli :L poriion of :i slicing machine showing; in einbodimeni .of he inljeni-ion applied lierel'o; ifig. 2 is Cal serlioinil View on line 2 2 of horizontal sectional rien' #l :i Verilcennnon use, iiY

1Eli linile. lnu'- iievelell te form tne eneeclge .i'or ille nniierinl upon .rliirli l'he nmeliine oprnies. ln order thai 'ille mnenine may :ieeui'niely Cnt l'liin slieee olf imiforin lillielness from innierini eneilj: invhein :is iter ellnnile rocked imm. it is n eeemiry ilni lilie lieielell periphery oi" ille miti-ing" disk :lnill lne kept very sinirp, :xml edge, lqepl; irne :unl :leenraie if 'has been usuel hereioore to prornle :i ro'mry frhling @Isig having :i beveled surl'm-e :ir-

rnngred io be spring-pressed ngi-:inist ille beveie l periphery of 'ille lni'lie. in :iflfliiion io llie ,g'rinfier fior ille beveled edge of the knife, il, inw been usual io provide :in :mxilinrgY wheel for renim'inp; lie bnr from the opposite :wlge of ille (liek :i'iier lle malin rimlingi Operniion luis been These, features ere, sili reinined in the. preeen inveniion, lint ille oporuiien oi' time main grinding wheel lnis `been rznliezilly :'lmnggei'l.

'lierelm'ifn'e llas been illeI practice to Serie-.l fn 395,205.

mount ille cutting ltnie :i possible einen new.) en that in snbsequen' ting knife, regardless of Whether lzlie edge remains true or not. El; iras been found that Where 'this construction is used for Sonie lengt-li of ime, tie knife gre ily loges its originel :ieeinzn'ys and thee begins te wnbble, not b inse of play in the bearings, imi because oi elle feet that the position of lille erige itself :it various peinte on the periphery of ille knife has shifted., clue to the grinding opern'ion. if lhere should clninee te be :i` portion of the knife hat is :i little time oil zr porions, is :ipparen that lilie sharpening 'wheel will cui; more ragiilly on this portion bilan on elllen;z :md if the wlieei is uniformly Spring-pressed againstnli portions of die periplieiya each siniriening operation will deepen Ithe depression miele :it liis sofi, portion of'tlie knife, time musing ille edge :Lt this point to ref-elle, from the general :ilineinent of the knife.. inegi :ilse happen illee. smell piece, is broken 'from the :e of the knife by eine means, :unl when "ellis occurs5 under the old con. rnetion, the frrinCler Will be preseel ino the niek eline formeel, nid insiemi oi: the entire. knife beinga ground io forni :i new exige. Wliieli shell be in true nlinenienJH zi'no'ell is gi'enmi in die lmile al; the, pimiion Wliere the original niek was formeel, illus shift-ing' the position of the edge :it this point, The, ultimate resul of sugli i"riniling is always; 'lo produce :i more or less inaeenrnely :dined edge. which will prodnre unevennees in the thickness of Elie eliees wliieli meent. The present invention, in' n'leelnmiram which will loe described, overcomes this (lillienliv.

A second liefert of the old construction is due io the fuel, llnr'e the. rotation of the grinding knife has heretofore been produced` the present invention, with the result that a more efficient sharpening action is procured between the grinder and the edge of the knife. ,l j

In the figures of the drawings, the numeral 1 designates the frame-work of a slicing machine, havinga table top 2, over which the carriage for the material to be' i the mechanism which it contains.

sliced'is reciprocated to bring the material into position to be operated upon by the slicing knife 3. A drive shaft 4 is rotated in the usual manner by mechanism, not shown, and carries a sprocket wheel 5,' driving a sprocket chain 6, which rotates a second sprocket wheel 7, secured to a shaft 8, on which the slicing disk 3 is mounted. By this mechanism, the disk is rotated during the cutting operation. The sprocket wheels and chain are inclosed in a hollow casting 9, which forms a casing for this mechanism, and which is provided with a bearing 1() at its upper end for the shaft 8.-

Projecting upwardly from the bearing 10, is a pair of abutment or wall members 111, between vwhich a base 12, of a socket member 13, is positioned. Lag screws 14 hold the base 12 in place and project through elongated slots 15, arranged to permit a slight adjustment of the socket member 13 toward and away from the cutting knife 3. Mounted. for vertical adjustment in the socket 13, is an upright 16, which is pref vented from rotation in the socket and held in adjusted position by a set screw 17, op erating in a slot 18, in the upright 16. At the upper end of the upright 16, is an arcuate bracket 19, provided with bearings 20 and 21 at the upper ends of the two arms thereof respectively. Mounted in the bearings 20 and 21 foil pivotal movement about a horizontal axis, is a hollow casing 22, which is approximately spherical in shape, and which may be formed of two sections in order to facilitate assembling of A bolt 23 is provided with a square head 24 embedded in a corresponding recess in the casing 22, the bolt being journaled in the bearing 20, as shown in Figs. 2 and 3. The bolt 23 is provided with a squared portion 25, on which ismounted an arm 26, havin'r a finger piece 27 atihe outer end thereof. A pin 28 projects from the arm' 26 on the side opposite the finger piece 27, and cooperates with depressions in an arc-sha ed bracket 29, secured to the bearing 20. y this construction, the casing 22 may be rotated to dilfcrent positions about its horizontal axis, and held in these positions by the pin 28 projecting into the depressions in the holding bracket 29. The pin 28 may be springpres-sed, or the arm 26 may be made suiiiciently resilient to permit shifting of the vpin into and out of the depressions.

J ournaled in the bearing 21, is a sleeve 30,

' The arms of tne bracket 32 carry at their extremities alining bearings 34 and 35 respectively. A beveled pinion 36 is journaled in the bearing 34, and a sleeve 37 is mounted in the bearing 35 and is movable longitudinally thereof. The opening in the bearing 35 is enlarged throughout a portion of the leuffth thereof as shown in Fi 3, to accommodate a coil spring 39, which bears at one end against a shoulder 4() on the bearinfT and at' the other end against a shoulder 41, formed by an enlarged portion 4t2', of the sleeve 37. le spring 39 normally tends to force the sleeve 37 outwardly, as will be readily understood. A shaft 43 passes through the sleeve 37, and is free to rotate therein. The enlarged portion 42 of the sleeve 37 extends through an opening 45 in the side of the casing 22 adjacent the knife 3, and a Grinding wheel 46 is carried by the shaft 43 in a position adjacent the periphery of the knife 3 and on the outside of the casing 22. The portlon of the snaft 43 which extends through the pinion 36 is provided ivvith a flattened portion 47 to cause the shaft to rotate with the pinion, but to permit the shaft to move longitudinally relative thereto.

A shaft-48 isjournaled in the sleeve 30 and carries a beveled gear 49 at the end thereof,within the casing 22, in position to mesh with the beveled pinion 36. Secured to the opposite endvof the shaft, beyond the bearing 21, isra second beveled. pmion 50, which meshes with a pinion 51, carried on the upper erd of a vertical shaft 52, journaled in an arm 53, which extends laterally from the bracket 19. The lower end of the shaft 52 is journaled in a bearing 54, carried by a laterally Kextending bracket 55, securing to the casing member 9. The lower end of the shaft is provided with a beveled pinion` 56, meshing With a beveled pinion 57, carried on a shaft 58, journaled in a bearing 59, extending through the casing member 9. Secured to the end of the shaft 58, within the casing 9, is a beveled pinion 60, which meshes with a beveled Wheel 61, mounted to rotate freely on the drive shaft 4. The gear 614 may be clutched to the shaft 4 by a friction clutch 62, operated by a hand knob 63 and clutch rod 64, arranged to move in an opening 65 in the end of the shaft 4. When the gear 61 is clutched to the shaft 41 and the machine is operated, thetheirA "would he imparted to it hy simple frictionel Contact hetvveen the grinding Wheel and the cutting knife. The direction ot rotation of the gear of the grinder 46 is preferably such .that the operating portion of the Grinder will move toward 'the edge losing sharpened, The 'vertical position of the grinder, relative to the knife, may he regulated by adjusting the upright 1 6 in the socket 13, the upright being held in position after it has been adjusted by the set screw l?. In order that this edjnstment may not interfere with the operation or the shaft 52, this shaft is provided with eneitiension coupling 66, as shown in Fig'. 2.

e grinder 5K3 is provided With beveled edge 67, which bears against the beveled portion of the knife 3, as indicated in i. n order that the position of the grinding edge of the Wheel 4.6 may he accurately ad- "usted relative =to the edge of the knife, the i racket 32 may 'oe shifted in the casing 22, end held in adjusted position by vthe set screw 3l. The opening 45 through which! the sleeve Li2 extends is oblong' in shape, as shown in Fig. 2, tor the purpose of permit'- ting movement of the bracket 32 and the grinding Wheel 46 into various adjusted positions relative to the casing 22. The bracket 32 is so shaped that the axis on which the Wheel 46 rotates stands at en oblique angie to the piene ofthe knife 3, in order thaty the beveled surace 67 may hear properly against the edge oii5 the knife. v

lThe grinder Wheel 46 is normally torced outwardly against the cutter 3 by means of the coil yspring 39, To hold' the grinder n away from the knife, When the knife is not being' sharpened, the sleeve 37 is provided with a rigidly attached arm 68, on the end.

of which is mounted a cam roller `an ranged tov hear against the cam surface ot a wheel 70 mounted for rotation on a shaft 7i, secured to and projecting inwardly from one side of the casing 22. A coil spring 72 is secured to the cani Wheel 70 and the shaft 7l, and normallytends to rotate the Wheel to the right, es Viewed in Fig. 3. The Wheel is' carried by a hub 73, which has a handle or lever 74e secured thereto, arranged to project upward-ly through a slot '75 in the casing 22, es.shown in Figs, l and 2. The lever '(4 may loe moved in a clockwise direction, as Viewed in Fim 2, against the tensior ofA the spring 72, and secured in two atl gusted positions by a sliding detent 76, Whitv cooperates with openings 77 and 78 in the' casing 22, which ere of greater diameter than the ividth of the slot 75, and into which the detent 76 may be moved by any .welll lmown operating mechanism carried by the handle 74. The cam surface 80, shown in broken lines in F10. 3 is so shened that the b a .lf

first result of the movement or the lever Ze to the right, is to permit the Wheel Lidto the hearing 3o, cnrried en tu in opening 86 of greeter liar space hetiveen the projections through the hearing to the sleeve fr friction shoe Si" is located in the openii and a coil spring 88 positioned opening between the fri-:filon shoe S5 the short end of the lever i the iirst pe-rt of 'the movement oi' the 7i, and until the arni lies hee l leased by the cani sin-tace 8O to permit the grinder Wheel i6 to moved into Contact 9G with the knife 3, the erm 82 hears upon a portion of the cam 8l, which is concentric with the shaft 7i. After the grinder 4G has moved intocontnct with the ltni, 3, end is held in this position the against. the tension1 or ringv 39, ie active portion"of the can) contacts 'iv .ii the lower surface ot the lever and forces the long; end or' the lever upwardly, thus causiirg` coinpression ot the spi/'ingI 88 to force the iric- 1o tion shoe 87 treinstthe sleeve El?. in this wey, the shoe 87 is held against the sleeve 3i' by resilient i" rce lsuilicient to prevent any further movement of the sleeve in a longitudinal direction. The grinder il is thus los eratio the ment when the ,grinding oL nleterl, The parts are so pro the erin 58 will first laere `friction shoe 87 subseque i y locking contact with the sleeve Il?, moth operations being completed when the lever luis been moved a sniicient distance to causo e detent 76 to register with the opening t? which marks the rst opcinting iliosition or" the lever Tet.` During furthe:- movciucnt ot' the lever 74 to the right. as shown in Fics. 2, 3 and si, :e second concentric poi-tion of ,e cam ell will coperzito with the lover and continue to hold the friction shoe 2? in iol-lei715, inL' contact with the 'sleeve Si'. Y

n second grinding' Wheel 90 secured to the cud of :t shaft Si. :intl liclil in position on the sido ol" the lcniife opposite 'lzsi' occupicd hy the grinder over the cam surface 96 on the wheel 70, and

. ger piece 27 and the ar mounted for rotation within a sleeve 92, but constrained to move longitudinally with the sleeve. The sleeve 92 is carried by a bearing cylinder 93, secured to the casing 22, and is freeto move longitudinally within the cylinder. A coil spring 94 normally tends to force the sleeve 92 inwardly to draw the grinder 90 against the outer surface of the blade 3. A cani roller 95 is secured to the sleeve 92, and bears against the ed e of the cam 70, opposite that against w ich' the roller 69 bears. The cani roller^`95 noi'- mally holds the grinder 90 away from the blade 3 against the. tension of the spring 94. When, however, the cani 70 is moved by the lever 74 past the position in which the lever is held by the opening 77, the roller 95 moves permits the inner surface of the grinder to be drawn against the outer portion of the blade 3. While the lever is in this position, the grinder 46 remains locked in its operating position by the cani 81 and thev friction shoe 87. The detent 76 ma be moved into the opening 78 to retain tie parts in this position as long as desired. This need not be mo-re than a sufficient time to permit one or two rotations of the blade 3, since all that the grinder 90 is intendedto do, is to remove any bur that may be formed by the grinder. 446. Since no actual grinding is desired on the part ofthe wheel 90, this wheel need not be positively driven, as in thecase of the wheel 46, but may depend for its rotation upon the frictional contact between the grinder .and the knife.

- After a sharpening operation has beencompleted, the lever 74 is 'permitted toreturn to its initial position under the influence' of the spring 72, thus moving the grinders 46 and 90 away, from the knife 3. In order to further move the grinders out of operative position and away from the knife, the entire casing 22 maybe rotated' about its horizontal axis by moving the fin-4 26, to rotate the casing in a counter-clockwise direction, as viewed in Fig. 1. This will move the grinder wheels upwardly away from the knife into a position in which they are held by the pin 28 until it is desired to repeat the sharp i knife, a Sharpener for said knife adjustable' ening operation.

1. In a slicing machine having a rotary slicing knife, a Sharpener for said knife, means for rotating said slicing knife, and separate means for operating said Sharpener while in contact with said knife, said separate means being arranged to impart a lin ear speed to theportion of said Sharpener contacting with said knife, differing from the linear speed of the portion of the knife with which it contacts.

2. In a slicing machine having a movable slicing knifeha movable Sharpener for said 'relative thereto, and transmission mech# power to said *sharp-f knife, and separate driving means for iinparting simultaneous movements differing in speed to said Sharpener and knife while they are in contact with one another and while said knife is in operative position on said machines.

3. In a slicing machine having a rotary slicing knife, a rotary Sharpener for said knife, and separate driving means forl imparting simultaneous rotation to said sharpener and knife while they are in contact with one another and while said knife is in operative position on said machine, theliuear speeds of the contacting portions of said Sharpener and knife differing from one another.

4. In a slicing machine havin a knife, and means for simultaneously. imparting independent rotation to said sharp#-` ener wheel and knife in approximatel the saine direction while said wheel and ,'fe are in contact with one'another and while machine, the linear movement 'of the ntacting parts of said wheeland knife di ering in speed. 5: In a slicing machine, a drive shaft, a slicing knife means for connecting said shaft with said knife to rotate said knife,'a

`:said Sharpener, said connecting means being arranged to permit adjustment of said Sharpener without breaking the drivin connection between said Sharpener and sai i driving device.

7. In a slicing machine, a driving device, a Sharpener, and extensible transmission mechanism for driving said 'Sharpener-from said driving fdevice and j for permitting adustment of said Sharpenerl without breakii'ng the dri'ving connection'between said Sharpener and said driving device. Y

8. In a slicing machine having a slicing nisni for imparting ener, said transmission'mechanism being ar-- ranged to permit adjustment of saidsharpener vrelative to said knife without interfering with the transmission ofl power thereto.

9. In a slicing machinehaving a rotary slicing knife, a drive shaft means for connecting said knife with sind drive shaft to. drive said knife, a Sharpener wheel for saidknife, and transmission mechanism for imparting klr'novement from said knife to said- -slicing knife, a Sharpener whee for said I` l -said knife is in operative position on said of said knife to cause the various portions of said edge to travel in the same cutting plane when Said knife is rotated.

28. lIn a slicing machine having a rotary slicing knife, a vgrinder for truing the edge said knife, means independent of said knifel for operating said Sharpener, and means for preventing said Sharpener from moving bodily relative to Said knife during a sharpening operation.

' 30. In a slicing machine having a rotary slicing knife, a Sharpener wheel for said knife. separate means for rotating said knife and Sharpener wheel while in contact with one another forsharpening said knife, and means' for preventing movement of said Sharpener Wheel relative to the cutting plane of said knife during a sharpening operation.

31. In a slicing machine having a rotary slicing knife, a Sharpener for said knife, means for-moxfing said Sharpener toward and away from said knife, and means for locking said Sharpener against such movement.

32. In a'slicing machine having a rotary 'slicing knife, a Sharpener for said knife,

rmeansother than Said knife for driving` Said, Sharpener, means for moving said Sharpener.` into contact with said knife, and means for locking said Sharpener 1n this position.

33. In a slicing machine having a slicing knife, a Sharpener for Said knife, resilient means for moving said Sharpener into contact with said knife, and means for locking Said Sharpener in the position thus assumed.

34. In a slicing machine having a rotary slicing knife, a Sharpener for said knife, means for adjusting said Sharpener relative to the cutting plane of Said knife, and means for locking said Sharpener in adjusted knife grinding positions and against such movement.

35. In a slicing machine having a slicing knife, a Sharpener for said knife, means for resiliently moving said Sharpener into con- -tact with Said knife where it is held by Said knife against the tension of said resilient means, and means for locking said Sharpener in the position thus assumed.

36. In a slicing machine having a rotary slicing knife, a grinding wheel for said knife, means for movingsaid wheel into contact with said knife, means for subsequently locking said wheel in the position thus assumed, and means for rotating said knife while Said Sharpener is locked in this position to cause said Sharpener to true the edge of said knife.

37. In a slicing machine having a rotary slicing knife, a Sharpener Whee for said knife, resilient means for moving said wheel into contact with said knife where it is held by said knife against the tension of said resilient means, means for subsequently locking said wheel against moving bodily relative to said knife, and means for rotating said wheel and knife while thus pos1- tioned relative to one another to Sharpen said knife and to true the edge thereof.

38. In combination, a rotary Sharpener for a rotary slicing knife, means for causing said Sharpener and knife to Contact With one another near the peripheries thereof, and means for drivingthe contacting portions of said knife and Sharpener in the same general y. dlrectlon, said drivmg means being arranged to lmpart a more rapid linear movement tol" the portion of said Sharpener contacting? with said knife than is imparted to the contacting portion of said knife.

39. In a slicing machine having a rotary slicing knife combination, a drive shaft, means for connecting Said knife with said shaft to be driven thereby, a rotary grinder for Said knife, .a driving train connecting said grinder and said drive Shaft, said train including means for breaking the driving connection between said shaft and said grinder, an adjustable support for Said grinder, and a driving connection between said grinder and said driving train arranged to maintain operative connection between Said grinder and said train independently of the adiustment of said grinder support.

40. In combination, a Sharpener for a rotary slicing knife, means for moving said Sharpener into contact with said knife, and positive means for preventing movement of Said Sharpener toward said knife beyonda position fixed by said means.

41. In combination, a grinder for a rotary slicing knife, resilient means for moving Said grinder into contact with said knife, positive means for preventing movement of said grinder toward Said knife beyond a position fixed by said positive means, and mechanism other than Said knife for'driving Said grinder.

42. Ina slicing machine, a Sharpener for a rotary slicing knife` means other than said name to this specification on this 7th day of July, A. n. 1916. HENDRIK STUKART;

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