US1674774A - Metal-sharpening machine - Google Patents

Description

LFMJTM June 26, 1l928 H. J. GAISMAN ET AL METAL SHARPENING MACHINE Filed May l, 1924 l2 Sheets-Sheet l ATroRNEY' June 26, E928.

Filed May 1, 1924 'l2 'Sheets-Sheet 5 ATTORNEY Jun@ 26, 11928., www@ H. J. GAISMAN El AL METAL SHARPENING MACHINE Filed May l, 1924 12 Sheets-Sheet 4 ATTORNEY me 2&9 B92@ 'mm H. J. @Mmmm ET AL,

METAL SHARPENING MACHINE Filed May l, 1924 l2 Sheets-Sheet 5 7. (SHA/:MA ATYORNEY @Eme 265 @28 H. J. GAISMAN ET Al.

METAL SHARPENING MACHINE Filed May 1, 1924 l2 ShQS-Shee 6 S R O T N E V m H. J. GHSMN H AIL.

METAL SHARPENING MACHINE Jun@ 269 w20 Filed May 1, 1924 1'2 SheeS-Shee 7 y I INVENToRs .Z Gals/mm (I Schumf/'er ATTORNEY June 26; wm km77@ H. J. GAISMAN ET AL METAL SHARPENI NG MACHINE Filed May 1, 1924 12 Sheets-shew 8 f4 if ATTORNEY H. J. GBSMAN ET AL.

METAL SHARPENING MACHINE Filed 'May 1, 1924 l2 Sheets-Sheet 9 NVENTOR S 1( JGm's/mm'. Schumacher June 26 Eg H. J. GAHSMAN ET AL METAL SHARPENING MACHINEl Filed May l, 1924 12 Sheets-Sheet lO INVENTORS HJG'mLg/wafmfSc/ammw L" Cau/WL ATTORNEY 5am@ 26, QZ im H. J. GAISMAN ET AL.

METAL SHARPENING MACHN Filed May l, 1924 l2 .Sheets-Shee'I l1 lill! me 269 w, www@ H. J. GAISMAN ET AL.

METAL SHARPENING MACHINE Filed May l, 1924 12 Sheets-Sheet l2 l /73 0, yINVENTORS ff 2 /XJG'a/'smanchamac/zer BY ,A n

f/ f. cru/w42 ATTORNEY Patented denne 26, i228.

UNET@ SFFFF tana l FFNF @FWF HENRY J. GAISMA, F NEVI YORK, AND CONRAD SCHUMACHER, 0F LYNNBROOK, NEW YORK; SAID SCHUMACHER ASSGNDB, TQ SD GASJIN.

METAL-SHARPENING MACHINE- Application filed May 1, 1924. Serial No. 710,270.

'lhis invention relates to improvements in machines adapted to grind and hone the The invention is edges of strips of metal.

particularly adapted for sharpening the edges of metal strips adapted to be cut into pieces to serve as safety razor blades, and the invention embodies means for simultaneously grinding and honing opposite edges of the metal strip to provide blades of the so-called double-edge variety.

ln carrying out the invention as illustrated in the accompanyingy drawings the machine is provided with grinding disks or rolls set in' such relative positions that an adjacent pair of disks will site sides diagonally disposed of a niet-al strip passing between the disks, and the machine is also provided with means for honing ground edges oi the strip, such means being so arranged that one set of honing members will simultaneously hone along one ground edge and another set of honing members will simultaneously hone along the other ground edge of the metal strip.

The invention comprises novel details of improvement that will be more fully hereinafter set forth and claims.

Reference is to be had to the accompanying drawings forming a part hereof, wherein Fig. 1 is a side elevation of a machine embodying the invention;

Fig. 2 is a` plan View of the machine;

Fig. 3 is a section on line 3, 3, in Fig. 2;

Fig. 4 is a section on line 4, 4, in Fig. 3;

Fig. 5 is'a section on line 5A, 5, in Fig. 2;

Fig. 6 is an enlarged view taken on the section line 6, 6, in Fig. 1, looking in the direction of the arrows:

Fig. 7 is a corresponding View on the line 7, 7. in Fig. 1;

Fig. 8 is a view partly in plan and partly in section on the irregular line 8, 8, in Fig. 7;

Fig. 9l is an elevation partly invsection on yline 9. 9, in Fig. 8;

Fig. 1() is a detail section on line 10, 10, in Fig. 6;

Fig.l 11 is a partly sectional plan View enlarged. illustrating honing devices;

Fig. 12 is a side view of part of Fig. 11;

Fig. 13 is a side view of Fig. 12;

Fig. 14 is a section on line 14, 14, in'Fig. 11, illustrating the honing rolls in position lll grind simultaneously oppo-.

then pointed out in the' to lione the upper ground edge of metal strips;

Fig 15 is a section on line 15, 15, of Fig. 12;

Fig. 16 is a partly broken detail of guiding means for the strip for the honing rolls of Fig. 14;

Fig. 17 is a perspective detail oi a acing for the guiding means or'n Fig. 16;

Fig. 18 is a detail cross section similar to Fig. 14 but illustrating a set of honing rolls in position to hone the lower edge of the ground metal strip;

Fig. 19 is a detail of part of Fig. 18;

Figs. 2O and 21 are details of the sharpened metal strip; Fig. 22 is a partly' sectional side elevation illustrating means for supporting the honing `rolls in a resilient way for operating upon the ground edges on opposite sides of the metal strip;

Fig. 23 is a plan view taken along the line 23, 23, in Fig. 22;

Fig. 24 is a detail section on line 24, 24, in Fig. 22;

Fig. 25 is an enlarged face view of strip guiding means;

Fig. 26 is a section on line 26, 26, in Fig. 25;

Fig. 27 is a perspective detail ot a strip guide;

Fig. 28 is a partly sectional side view of strip guiding means;

Fig. 29 is a horizontalsection of Fig. 28;

Fig. 30 isa side elevation of Fig. 29;

Fig. 31 is a detail cross section on line 31. 31. of Fig. 30, and

Fig. 32 is a section on line 32, 32 of Fig. 31.

Similar numerals of reference indicate corresponding parts in the several views.

The main frame 1 of the machine may be of any suitable construction and is shown provided with spaced rods 2 fitted longitudinally along opposite sides o the machine upon which fixed parts are mounted. At A is a strip of metal, such as of steel, suitable forthe production of razor or other blades, which strip is supplied in a coil on a reel within a casing 3 suitably carried by the main frame in a well known way. The strip is led through the machine to a take-up reel 4 detachably carried upon the shaft 5 shown journaled on rods 2 in a well known way,

lili?) INN (Fig. 2). The shaft or reel 4 is shown provided with a pulley 6 operated by a belt 7. Means for actuating belt 7will be hereinafter described.

In the example illustrated in the accom panying drawings means are vprovided to grind the opposite sides of each of the longitudinal edges of strip A as the latter travels through the machine.` `Within a suitable protecting casing 8 secured upon the main frame, and preferably having a removable cover 8', (Elg. 7), grinding disks 9, 10, 11 and 12, of carborundum or other suitable material, are rotatively disposed in pairs for grinding the appropriate edges of strip A. Each pair of disks is diagonally disposed respecting strip A so as to grind along diagonally opposite edges of the strip. In the arrangement illustrated, as indicated in dotted lines in Eig. 7, the pair of disks 10 and 11 grind on diagonally disposed edges of strip A and the pair of disks 9 and 12 grind on Vthe remaining other diagonally disposed edges of said strip, the pairs of grinding disks being suitably spaced apart, as indicated in Figs. 8 and 9. The casing 8 is provided with slots 8n on opposite sides for the passage of strip A, (Eig. 8). Each of the disks is carried by a corresponding shaft 13 that extends through a corresponding opening 14 within the appropriate side wall of casing 8. Such shafts are shown provided with corresponding pulleys 15 receiving belts 16 from pulleys 17 on main vdrive shaft 18 journaled in the main frame 1, which shaft 18 may be rotated by an electric motor 19, or in any suitable way. rEhe shafts 13 of each pair of disks, at their disk-supporting ends, are spaced apart, (Fig. 8), and each pair of shafts is movably supported for lateral adjustment toward and from each other, so that the correspending pair of disks may be caused to operate as desired upon diagonally opposite edges of strip A for grinding said edges. Each pair of shafts 13 are similarly supported on opposite vsides of casing 8, and as the arrangements are the same for each pair of grinding disks the description of one will suthce for both. An adjustable frame 20 is provided with diagonally disposed spaced rods 21, (Figs. 1, 6 and 8), upon which blocks 22 are mounted for sliding adjustment, each of which blocks supports a shaft 13. lin suitable spaces 23 in the blocks 22 clamp-mem bers 24 are mounted upon rods 21, which clamp members are shown split and providedy with screws 25 for clamping them securely upon said rods, (Figs. 6fand 8). rPhe shafts 13 are shown journaled in anti-friction bearings 26 carried by the blocks 22, (Fig. 10). Since the grinding 'disks are relatively close together and may require replacement, means are provided to permit removal and replacement et the disks `Without disturbing the corresponding shaft 13- in its bearings. As

shown in Fig. 10, shaft 13 is hollow and contains a rod 27 threaded at one end to receive screw 28 bearing against the outer surface of the corresponding grinding disks to force the latter securely against 'fiange 29 on shaft 13, the opposite end of rod 27 being retained securely within shaft 13 by screw 30. Each block 22 is shown threaded at 22a receiving corresponding screw 31 that projects through the appropriate part of'frame 20 and is provided with a linger piece or button 32 for operating the corresponding screw, (Fig. 8). By loosening clamp 24 and rotating screw 31 the corresponding block 22 may be adjusted along its rods 21 to adjust the corresponding disk radially to set the operating edge of said disk respecting the edge of strip A to be ground, and then by tightening clamp 24 the grinding disk will be retained in set position. The :trame 20 may be adjusted angularly to simultaneously present the corresponding pair of grinding disks in angular relation to the plane of travel of strip A, hence angularly respecting the diagonal edges of strip A to be ground. The frame 20 is shown provided with a curved ledge or projection 33 adapted to rest upon a curved supporting part 34 of a brace or bracket 35 secured upon rods 2 of the main frame by clamping straps 36, (Fig. 6). A screw 37 passing through a slot in projection 33 and threaded in a projection 35a of brace 35 serves to secure frame 20 in set position, which frame may be further secured by means of bolts 38 carried by frame 20 and operative in slots 39 in brace 35 for securing frame 20 in set position, (Fig. 6).

Each pair of shafts 13 with their corresponding grinding disks are supported by a corresponding frame 20. and each frame with its shafts and grinding disks is angularly or diagonally disposed with respect to the plane of the strip A passing through the machine on edge, one pair of grinding disks being disposed at an angle to strip A diftering from the angular disposition of the other pair of grinding disks respecting said strip. (Fig. 7). 1t will be understood that by adjusting the frame 20 of either pair of disks the edges of the latter may be set in desired position to grind corresponding diagonally disposed edge portions of the strip.

While the upper and lower disks 9 and 12 Lerma/r operating the corresponding screw 31, so that, in addition to the adjustment of the disks to engage the Strip by setting the corresponding rame 20 in desired angular relation, a further and final adjustment of either disk respecting strip A may be effected to set the appropriate grinding' disk in proper operating relation to the blade edge.

In orderto guide and brace the strip A adjacentto the points of contact of the grinding disks therewith a retaining frame 4() is placed in each ofthe openings 8El of casing 8 andsecured byv means of screws 41, (Figs. 6, 7, 8 and 25), which trames have` vertically disposed slots 40a inA which are located opposing plates 42, 43 that extend throughcasing 8 from its side walls. The plates 42, 43 are recessed .and spaced at 44 on their opposing surfaces to permit the strip A to slide therebetween, (Figs. 25 and 27). Said plates are retained in adjusted position respecting strip AA by means of upper and lower screws 45, 46 which determine the vertical position of the plates with# in slots 40'?, and the plates are held pressed together byv means of laterally disposed screws 47, which screws operate in frame 40, the screws 47 bearing against the sides of the plates, the walls 42', 43E1 of the plates abutting and bearing firmly together providing theYspace at 44 for the passage of strip A. The 'plate 4,2- is recessed on its upper and lower portions at 42", 42, and the platev 43 is correspondingly recessed at its lopwerand upper portions 43". 43C, (Fig. 27), such recesses being in position to admit the adjacent edges of the corresponding grinding disks 9, 10, 1,1, 12 to operate against the corresponding upper and lower edges of strip A, (Fig. 28). At the end ofy the plates 42, 43, where the strip A enters casing 8, just under the recess 44, saidplates are opposingly recessed to provide the space 44a in which a hardened metal block 44" is located and .clamped b v the plates. on which block the lower edge of strip A slides. (Figs. 25, 26 and 27). To retain the strip A pressed downwardly upon theblock 44b an adjustable resiliently pressed block 44 bears upon the strip and is guided in a recessed portion 42 between the plates 42. 43 above block 44, (Figs. 25, 26 and 27). The block 44 is pivotally connected at a with a link b, centrally disposed along said block, which link is pivotally .connected at o with an arm d pivotally supported at e between the plates 42, 43, which arm is pivotally connected at f with a rod g having a fork at its lower end receiving said arm and pivot, (Flgs. 7, 25 and 26). The rod g isreciprocatlve in a guide bracket h projecting from casm 8, and a coil spring z' bears against-sai bracket and against'stop (1 von rod g tendingenormally to force the block 44'Jv against strip A. A lever j is pivotally strip. When supported at k upon casing 8, the inner end of said lever being pivotally connected with `strip A and said block may tilt as maybe required acccording to the travel of the it is desired to insert a new strip, or for other purposes, the outer end s of lever j may be depressedl and retained by pin m on casing 8, whereupon rod g and arm '0l will be raised to correspondingly lift block 44". By the means described the strip A will be properly guided between the grinding disks at the portion of the strip between plates 42, 43, and since the disks of each pair operate on opposite sides of the stripv the latter will retaln its proper position to receive the grinding disks.

After the edges ot strip A have been suit-y abl ground the ground edges are presentedto onin rolls. A pair of honing rolls 48, 49 are aapted to operate along the upper ground edges of strlp A, (Fig. 14), and a pair of honin rolls 50, 51 similarly arranged are aapted to operate upon the lower ground edges of strip A, (Fig. 18), therefore one pair of honing rolls is located at a higher level than the other pair with the strip A traveling in the s ace between said pairs oi rolls. The honing rolls may be made of metal or other suitable material designed to finish the edges of strip A 'suitably tor use as a razor or other blades when the honed strip A has beencut into suitable lengths for such blades, as indicated in Fig. 20: Said pairs of honing rollsare arranged and operate in substantially-the same way, hence the description of one pair will suiiice for both.l Fach pair oi rolls is shown located within a corresponding chamber 52a ina protectin head 52 carried upon the main traine.l Fach head is provided with vertical'slots 53 at opposite ends for the passage ot strip A, (Figs. 12 and 15). Fach head 52 is mounted for vertical adj ustment, and the corresponding honing rolls are mounted for adjustment toward and from the ground edges ot strip A. The shafts 54 of the honingy rolls are journaled in corresponding frames 55 which are respectively pivotallysupported upon shafts 56 carried by the corresponding head 52, wheresal by the honing rolls 48, 49, and correspond- 'igly the honing'rolls 50, 51, are independnaled on arms 52d respectively of. heads 52. Springs interposed Ybetween stops57 on rodsI 57 and against the blocks 59 resiliently press corresponding honing rolls against strip A and resist ,lateral movement of said The rods'57 are retained in set position by nuts 61 thereon permitting said ,rods to slide in blocks 59, whereby adjustment of the honing rolls with respectA to the corresponding ground edge of strip A may be made. 1 Y

The heads 52 are adjustable in the plane ofthe Width of strip A, a brace or bracket 62 carried upon the rods 2 and extending across the machine frame serving to support lthe corresponding head 52. Straps 63 secure the braces or brackets 62 tothe rods 2 in set position, (Figs. 12 and 15). rlhe braces 62 iave spaced slotted jaws 64 between which the corresponding head 52 is located, screws 65 vpassin through the slots 64 enabling vertical. adjustment and retention of heads 52, (Fig. 15). Adjusting screw 66 meshing within threads in apertures 67 in braces 62 .and bearing against. abutments 68 on the corresponding head 52 enable adjustment of said heads vertically as well as angularlywith respect to screw 65 and as to the travel of strip' A for centering the heads respecting said strip, (Figs. 13 and 14).

The rolls 48, 49 rotate in the direction of the arrows in Fig. 14, and the rolls 50, 51 rotate'in thedirection ofthe arrows in Fig. 18. Means for'rotating said rolls comprise shaft 69`jour11ald in bearings u on an arm 52"?, the shaft being provided with pulley 70 receiving corresponding belt 71 from the appropriate pulley 72 on drive shaft 18, (Figs. 1 and 11). Each shaft 69 is provided with a gear 73 in mesh withgear 74 an one shaft 56, the gear 74 being in mesh with a gear 75 on the other shaft 56, (Fig. 12). rlheshafts of thefhoning rolls are respectively provided With pinions 76, 77 in mesh with the corresponding gears 74, 75, (Fig. 12) Whereby the honing in the directlon of the arrows in 12. Corresponding gearing is' appropriate y arranged for rotating the honing rolls 50, 51 in the direction of the arrows in Fig. 18. ln other words, the pairs of honing rolls respectively rotate in Such a way that'their operating edges advance toward the correspond- .ing ground edges of stri A. rllhe honing rolls are shown longitudinally disposed in the direction of the travel' of strip A and provided with spirally disposed or wormke honing ASurfaces which operate against` the correspondlng previously ground edged of vstrip A lwith an, advancing or so-called wiping action, substantially equivalent to the advancing and sliding angular strokes given to razor blades when being manually honed.

In order to retain the strip A with' its ground edges in position to be honed by the ystrips 81, (Figs. 16 and17) which strips are bent laterally at 81a and` rolls 48, 49 will be rotated maarre honing rolls guides for the strip are providedas follows: Two plates 78 are securedtogether, as by screws 79, (Figs. 14, 15, 16 I strip A between the plates. The opposing surfaces of the plates are'recessed longitudinally at 7 8 to receive hardened facing the ends of inserted in grooves 78 inthe corresponding plate 78, pins at 82 securing the facings to the plates'. In the construction shown in Fig. 14, where the upper ground edge of strip Ais exposed to the honing rolls 48, 49, the plates78 do not extend above said edge, whereas in the form shown in Fig.

18, where the honingrolls 50, 51 operate against the lower `aground edge of stripA, the plates 78 are made suiliciently high to accommodate openings 78 for' the entrance of said rolls, the facings 81I being above said rolls, so that thelower ground edge of strip A may extend into the spaces provided at 78b for honing the lower ground edge of strip A.

Instead of having the heads 52 rigidly supported, in manner before described, said heads may be. movably supported and balanced so as to automatically touch strip A and vibrate as may be necessary in case the edges of the strip should not be perfectly straight or the strip' be irregular in widt where it passes between a pair of honing rolls. Means for such purpose are shown in Figs.' 22, 23 and 24 arranged as follows:

Each head 52 is vertically slidable in a cor-l responding guide 83 supported by the respective brace 62. The heads .52 have pinsv 84projecting through slots 831 in guides 83, which pins enter lever 85, centrally pivoted at 86 upon an arm 87 carried by one ofthe braces 62, which lever is provided with adjustable counter weights 8 8 to balance the parts, (Fig. 22). A balancing beam orv arm 89 is pivotally supported at 90` upon arm 87 and is provided with an adjustable counterweight 91, the upper arm 89 of said beam or lever being shown slotted at 89" to receive a pin 92 extending from lever 85 and eccentrlcally disposed respecting the axis of said lever at 86. A shaft 56 is provided with a universal joint 93, (Fig. 22), connecting with the shaft of the corresponding pulley 7 0y that is journaled upon bracket 94 carried by one of the rods 2, (Fig. 22). There is a corresponding universal joint 93 for a shaft 56 of each pair of honing rolls. The arrangement described is suchjthat the weights 88 and 91 will be set in such a way that the cor- -ing adorded by the springs 60, asbefore demounted in a journa navarra d scribed.' Should the strip A passing be- 2. 'l'ihe guide C is shown provided with two tween the honing rolls be deflected or not be parallel guideways C formed by means ot straight when encountering one or another spaced walls C2 and a cover plate C3 secured of the honing rolls the latter may move or; on the guide by screws and having a dependl float with respect to the strip to accommoing rib C4, (Fig. 31). lin each of the guide- 9@ date the same, since the lever 85 may tilt apways C is located a slidable member G which propriately, the balancing weights always is normally dra-wn automatically in the ditending to restore lever 85 and the honing rection of the grinding rolls opposite to the rolls to the normal operative position, wheredirection of travelV ot strip A. While any by to avoid the objection that the honing suitable means may be provided for drawto rollsmight not operate upon some parts of ing the slide members G, as stated', the saine the strip A. The beam 89 Serves to resist are shown connected by deitible connections sudden movements of leverl 85 and to steady H IMPHSS OVGI pulleys H' and have Weights said lever. H2 to operate said connections and slide Any Suitable means may be provided for members. The pulleys are shown pivotally so propelling strip A through the machine he- Supported upon arms H3 extending' from tween the grinding disks and the honing Support D. Each slide G is showny provided rolls; A pair 0f feed rolls 95, 96 is canwithadoglthat is pivotally supported upon Tied by Shafts 97 98 journaled in bearthe/Slide ai? il'. ist the Outer O1' I'QQ @Kid the ings @n an arm of n bracket', 99 carried dog is provided with a nose or projection 9d by a bran@ 100 Supported by rods Q, l2 adaptedl to pass through a hole in the Figs. 1, 2 and 3). r1`he shaft 98 is shown. gFOlmd Strip a shoulder ls on the dog adjustable laterally to adjust said roll 96 SOPPHlgih@ latter against the Strip. 'iihe respecting roll 95. 'lhe vshaft 98 is shown SSI'iP iS SiiOWl providd 'With spaced holes l bon 101 Slidabl@ in A', between certain of which holes the strip 99 Way 102 in bracket 99, said journal box hav- Indy il@ Severed t9 plOOiUiC@ the blades after ing pins 103 projecting through slots 104C in gmdmg and homing the SW1P' The nos@ iig bracket 99, (Figa 3 and Li): A spring 105 is preferably rounded for ready cooperation t bracket 99 and with the strip and its holes. 'lhe guide C in way 102 bears agains against journal box 101, which spring is op and cover C3 are provided with opposing lon- 95 posed by an adjusting screw 106, whereby gitudinal slots or' sufficient height to permit the position of roll 96 respecting roll 95 may the strip A to slide therebetween without enbe adjusted for creating the desired pres- 'gaging the ground or honed edges of the ma sure upon strip A between said rolls for termi of the guide or the cover plate, (Fig. feeding the strip.v Shaft 97 is provided with 31). The Walls oi the depending rib C* are i399 gear 97 meshing with gear 98 0n Shaft 98, provided with longitudinal slots C5 through whereby said shafts will rotate at equal Which the corresponding dog l may operate,

speeds, and shaft 97 is also furnished with there being a dog l pivotally supported upon a worm gear 107 and with a pulley 108. The each slide member G and oppositely disposed ear/107 is in mesh with a worm 109 whose so as separately to cooperate with strip A.. 105 shaft 110 is journaled on bracket 99 and The inner end of the dog is provided with a provided with asprocket wheel 111 receiv-v lugr or projection 1 4 adapted to coo crate ing chain 112 from sprocket 113 0n drive with a trigger or swinging member J t at is shaft 18, (Fig. 1),.whereby the -rolls 95, 96 pivotally supported upon the corresponding are appropriately driven to feed the strip A slide G at J and is provided with spaced ears at the desired speed. or stops J 2 adapted to cooperate'with a corre- Means are provided to retain the upper andJ sponding projection 14, (Fig. 29). A'spring lower ground edges of the strip in proper K is shown connected atone end with the relation to the honing rolls as the ground pivot I and at the opposite end with a pin strip travels with relation to said rolls, since supported at the tree or outer end of u@ the ground and honed edges must not come trigger J. The outer walls C2 of uide C are in contact with any obstructions. Means are provided with longitudinal slots e throu h shown located on opposite sides of and bewhich the trigger .l projects and said wa ls tween the several pairs ot honing rolls, such are provided with stops or abutments L at opposite ends of slot C@ against which the i2@ means being indicated generally at B, (Figs. 1 and 2). Since each set of devices at B is` Corresponding trigger J may engage, (Figs. similar a description of one set will suice 29 and 30).

by reference to Figs. 28 to 32. A guide C ex- Since there are two slides G operative intends lengthwise of the machine, the same bedependently each carrying a dog l and a ing shown carried by a support l) having a trigger J, oppositely disposed with respect 325 depending extension D provided with averto the strip A, the dogs may operate indetical slot D2 ieceivin a. bolt E from an arm pendently with respect to the strip, and such lh" projecting upwardly from a brace F that dogs are so' arranged that when their noses extends transversely across the machine and 12 enter a hole A in strip A they will serve is suitably secured to the longitudinal rods to maintain in or align the strip in a desired is@ horizontal plane vertically disposed to keep the strip in proper operative relation to the 'grinding rolls. The slides G with their dogs dog I will be in engagement with a hole in the strip at the right iii-Fig. 29,. When the trigger J of the dog at the left in Eig: 29 engagesthe adjacent stop L said trigger will be tilted on its pivot, and during continued travel of slide G with the strip, bg reason oi the engagement therewith of og 1, the trigger will be gradually tilted until its spring K passes beyond the pivot J, whereupon the trigger will snap quickly to the ppposite .side and the corresponding projection J2 will engage the projection 14 and cause the corresponding do 1 to be released vfrom the strip, the parts t en assuming the position substantially as shown in dotted lines in Fig. 29. Upoirrelease of said dog from the strip the corresponding weight H2 will cause the slide with its dog and trigger to move to the right in Fig. 29, free from the strip. During such periods the other dog, being in engagement with a hole in the strip, will be propelled to the left in Fig. 29, until its trigger J is tilted to release the'dog from the strip in manner before described. Dun' ing the aforesaid travel of slide member G to the right with the corresponding dog disengaged from the strip the corresponding triggerJ will move into engagement with the companion stop L, (at the right in Fig. 29), whereupon the trig er J will be tilted toward the full line ocation in Fig. 29, and the corresponding projection J2 will engage the projection I4 of dog li to move the same toward the strip so thatits nose will engage a hole in the strip when the latter next approaches such nose, so that continued travel of the strip will cause such dog to engage and retain the stri in proper posit-ion with respect the honing rolls., The relation andv spacin of the parts is such that one .of the dogs 1 will 'always remainin engage,-

ment witha hole inthe stripwhile the other dog is being shifted from or toward the strip, the operation of the two slide members G and the dogs beir substantially alternate back 'and forth. y havingaset of the strip-sup rting devices as described on opposite si es of each pair of honing rolls assurance is had that the strip will he maintained with its corresponding ground edge in roper relation to a pair of honing rolls.

' ince the u per and lower edges oi strip A are groun and honed simultaneousl it is'desirable that the iinished strip shoul be wound upon the take-up reel d in a tiatwise from the machine and the Leraars direction, so as not to injure the finished edges of the strip. Said take-up reel is shown vertically disposed and strip A is deflected lor turned, as it advances, at an i angle of to its plane of passage at a point near the delivery end ofthe machine to cause the strip to wind flatwise on the take-up reel. Any suitable means may be rovided for such purpose. A roll 114, in double cone-like form or hollow, is "ournaled upon a fork 115 supported by a race 116 carried byrods 2, (Figs. land' 2), said roll to guide said belt over pulley 6, whereby the take-up reel is rotated in proper timing re-` specting the grinding and honing rolls, (Figs. 1 and 5).

A pi e 123 may supply water to casing 8 from w ich casing the water may be drained by a pipe 124 to a sewer, said water serving for cooling the grinding disks and washing away particles resulting from the grinding` Pipe 123 may supply tank 125 from which ya ipe leads and is provided with nozzles 12? to discharge water through covers 52b of the chambers 52Bfof the heads 52. Said heads are provided with hores at 52, (Fig. 15), communicating with outlet pipe 128 which may lead to a sewer, or to a Itank 129 to conserve the water. From tank 129 a pipe 130 leads to a pump 131, (Fig. 1), driven by belt 132 from a pulley 133 onI shaft 18. From pump 131 a pipe 134 returns the water to the upper part of tank 125, whereby a circulation of water may be maintained through the chambers 52 for cooling the honing rolls and strip A and' washing away debris. v

The stri A having been placed in osition in the mac ine, passing from the ree within casing 3 to take-up reel 4f with the feed rolls 95, 96 adjusted to propel the strip, the grinding disks and the honing rolls will be adjusted in proper relation to the strip. When the machine is started the will iirst grind along o posite sides of the upper and lower edges o the strip and when such ground edges of the strip travel hetween the honing rolls the latter will act to hone the upper and lower ground edges of the strip on opposite sides, the grinding disks and Vhoning rolls operating simultaneouslyv uponV the strip as it travels. The strip having the honed edges will be wound upon reel d and such reel may be removed strip may be cut into any desired lengths for producing razor grinding rolls plane of the strip.

reverra blades or the like. By means of the invention described so-called double-edged razor blades may be roduced expeditiously fr om previously har ened steel without requiring the blades to be hardened after they are sharpened whereb Y the cost of manufacturing such double-e ged blades. is minimized. Having now described our invention what we claim is:` A

l. A sharpening machine comprising means to guide and propel a strip to' be sharpened, a 'plurality of pairs of grinding disks for the stri located edgewise perpendicularly to the p ane of the strip, each pair of disks being diagonal respectin the plane of the strip to engage'opposite sides thereof, blocks supporting the grinding disks, means Aslidably supporting the blocks of each pair of disks including adjustably supported frames for equally adjusting the corresponding pair of disks at the same angle respect ing the strip, and means to retain said frames in set position with the corresponding pair of grinding disks in angular relation to the 2. A sharpening machine comprising means to guide and propel a strip to be sharpened, a plurality of pairs of grinding disks for the strip, a frame for each pair of grinding disks, rods carried by said frames, blocks adjustably supported by said rods, said blocks being provided with bearings for supporting the disks, and means ad justably supporting said frames for adjusting the corresponding disks around the plane of the strip at the same angle respecting the strip.

3. A sharpening machine comprising means to guide and propel a strip, a plurality of pairs of honing rolls, heads rotatively supporting said honing rolls, one pair of honing rolls being supported onl a level' higher than the other pair, guiding means for the heads, a lever operatively connected with said heads, and balancing means associated with the lever for normally retain-l ing said rolls in operative relation with the corresponding side edges of the strip.

4. A sharpening machine as set forth in claim 3, provided with gearing to rotate the corresponding pair of rolls, a universal joint connected with each gearing, and means to rotate the universal joints.,4

5. A Sharpening machine comprising grinding disks, means to propel a strip, plates havingD a space therebetween for a strip, a block etween said lates upon which the strip may slide, a bloch adapted to bear upon the strip, and means resiliently pressing the second named block toward the strip.

6. A sharpening machine comprlsing grinding disks, means to propel a strip, plates having a space therebetween for a strip, a block between said plates upon which the strip may slide, a block adapted to bear A direction of the strip means to engage and support the strip, means l uponthe strip, means resiliently pressing the second named block toward the strip including an arm pivotally connected with the second named block, a spring" cooperating with the arm to press the block toward the strip, and means to remove lsaid block from the strip and retain it out .of engagement therewith.

7. A sharpening machine comprising grinding` disks, means to propel astrip, plates having aspace therebetween .for a strip, a block between said plates upon which the strip may slide, a block adapted to bear upon the strip, means resiliently pressing the second named block toward the strip including an arm pivotally connected with the second named block, a rod connected with 'the arm, guiding means for the rod, a spring normally pressing the arm to press the second named block toward the strip, and means cooperative with the rod to move the second named block from the strip and retain it out'of operativelrelation thereto.

8. A sharpening machine comprising sharpening devices for a perforated strip, independent aligning vdevices operative in the aperturesof the strip for maintaining an edge of the strip in cooperative relation to the sharpening devices, and means to cause travel of the strip along the sharpenl ing devices, the aligning devices being llo- Y cated on opposite sides of the strip to operate independently of one another in the apertures of the strip.

9. A sharpening machine comprising honing rolls for a strip, .means to propel the strip, and supporting means for the strip movable therewith including means to release the supporting means from the strip.

l0. Asharpening machine comprising honing rolls for a strip, means to propel the strip, a reciprocative member rovided with means to engage and support t e' strip while traveling therewith means to release the irst named means from the strip, and means to return said member with its supporting means for re-enga'gement with the strip.

1l. A sharpening machine comprising honing rolls. for' a strip, means-to lpropel the strip, a reciprocative member operative in the and provided with to retain the first named means in connection lwith-the strip and release said means therefrom, spaced stops cooperative with the second namedv means to causejthetirst named means to engage and to release the strip, and means to operate said member in the direction opposite to the travel of the strip.

12. A sharpeningmachine comprising honmg rolls for an apertured strip, means to propel the strip, a slide member operative lil() parallel to the strip, a dog pivotally carried y said member and having a nose to engage apertures of the strip, means to cause the dog stops to operate said means, and means to propel the member vvithits dog in adireetion opposite to the travel of the strip. I

13. A sharpening machine comprising honing rolls for an apertured strip, means to propel the strip, a slide member operative arallel to the strip, a dog pivotally carried y said member and having a nose to engage apertures of the strip, a trigger pivotally carried by the Vslide member and having spaced projections to engage a projection on the dog a spring cooperative with saidtri ger and positioned to extend on opposite si es of the pivot of the trigger .for retaining the dog in and out ot' engagement with the strip, spaced stops to actuate the trigger in opposite directions, and means to move the slide member in a direction opposite tothe travel of the strip. 4 Y

14. A sharpening machine comprising honing rolls for a strip, means 'to propel the strip, and separately and alternately mov,-

4ablel means adapted toA engage. and support the strip and release the same during its travel.

15. A sharpening machine as set forth in claim le, in Which the separately movable means are located on opposite sides ot the strip.

16. A sharpening machine comprising honing rolls for a strip,means to propel the strip, slide members on opposite sides ofthe strip' provided with dogs to engage the strip,

vmeans to retain the dogs in engagement with the strip and release the dogs m the strip, and means to move said members and dogs automaticall in the direction opposite to the travel o the strip.

maarre 17 A sharpening machine comprising honing rolls for a strip, means to propel the strip, slide members on opposite sides of the strip provided with dogs to engage the strip,

`a trigger 'pivotally carried by each slide member and providedwith spaced projections to engage a pro]ection on the corresponding dog, spaced' stops for each of the triggers to tilt the lat-ter, a spring connected with each of the triggers normally tending to retain a projection of each trigger in engagement with a projection ofV the corresponding dog, and means,y to move the slide members automatically independently in the direction opposite the direction of ,travel of the strip.

18. A sharpening machine comprising honing rolls for a strip, means to propel the strip, a guide extendin along the strip, a slide member on the guide, means normally tending to move the member inthe direction opposite to the travel of the strip, the guide having a lslot on the side near the strip, av dog pivotally carried' by the slide member" operative in said slot and 4having a nose to engage apertures in the strip, said dog having a projection, a, trigger pivotally carried by the slide member and having spaced projections to cooperate with the rejection of the dog, a side Wall of the guide 'having ai slot receiving said trigger, a spring connected with the trigger operative to retain either of its projections in engagement `with the projectlon of the dog to retain the dog in or out of engagement with the strip, and spaced stops positionedto engage the trigger to sa a..

Hanni* a. earsnan. i nonnen sonni/incitan.

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