US1680384A

US1680384A - Trimming machine

Info

Publication number: US1680384A
Authority: US
Publication date: 1928-08-14
Anticipated expiration: 1945-08-14

Description

B. JORGENSEN Tannuuencamn Aug.

5 Sheets-Sheet l ug B. JoRGENsEN TRIIUIING MACHINE Filed JanA 10, 1924 3 Sheets-Sheet 2 Aug. 14, 1928.

B.- JQRGENSEN Patented Aug. 14, 1928.

UNITED STATES 1,680,384 PATENT OFFICE.

BEBNHARDT J ORGEN SEN, 0F BEVERLY, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

TRIMMING MACHINE.

Application filed January 10, 1924. Serial No. 685,381.

This invention relates to trimming machines and more particularly to machines for trimming surplus material from the bot-V tom of a lasted shoe.

A wellsknown type "of sport shoe has a canvas upper and a rubber sole, and depends upon a vulcanizing operation to attach` the sole. Incidentallyto lasting such a shoe the marginal portion of the canvas upper is drawn over the edge of the `insole and` is secured tothe bottom of the latter by an adhesive. The insole, in a shoe of this type, is smooth and without the channel, lip and shoulder commonly provided in insoles for other types of shoes, but notwithstanding this condition lumps are produced in the overdrawn marginal portion of the upper around the toe where it is necessary to crimp or pleat the upper to effect satisfactory lasting. It becomes necessary to trim the crimped or pleated portions to make the bottom of the lasted shoe smooth and even before the outsole is laid, for otherwise they would seriously weaken the union to be subsequently effected by vulcanization and would impart unevenness to the outsole.

The accompany drawings illustrate an improved trimming machine suitable for trimming the crimped or pleated portions that have been formed on the bottom of a lasted shoe, and for trimming olf lumps of any form, however they may have been pro-.

duced. The invention is not, however, restricted to the particular operation or to the type of shoe mentioned, but since the illustrated construction is designed for said operation it will be described accordingly.

An object of the invention `is to provide a trimming machine by which the trimming will be caused to conform to the transverse convexity and the longitudinal convexity or spring of the bottom of the shoe. To this end, a feature of the invention consists in regulatable cuttingmeans the effective shape of which is variable at the cutting locality to approximate acurvature of the work, for example, the transverse conveXity of the shoe bottom'. The preferred typo of cutting means comprises rotary disk knives arranged in edge-to-edge relation and relatively adjustable to various angular relations so that their cuts, considered collectively, will approximate the transverse curvature of the work.

Another feature of the invention comprises improved means for controlling ma nipulation of the shoe to insure trimming in a predetermined course or courses Without especial skill on the part of the operative. The illustrated means for this purpose are constructed and arranged to engage the bottom of the shoe to steady the latteragainst rocking sidewise and to lead the shoe so that the course or courses of trimming will be parallel to the longitudinal curvature or spring of the shoe bottom.

One novel feature of the work-guiding means consists in a work-rest movable with the work to lead the toe end into operative relation with the trimming means and guided to impart a longitudinal rocking movement to the shoe such as to cause the trimming to progress parallel. to the spring of the shoe bottom.

Still another-feature consists in improved means'for covering the trimming means to guard the operatives lingers from injury. This feature includes movable guards initially covering i the cutting edges of the knives, and means movable by the work to retract said guards from the path of the Work. The aforesaid movable. woilerest maybe caused to do double duty by using it to lretract the above-mentioned guards, and it is arranged and connected to be so used in the organization herein disclosed.

The trimming knives are not only relatively adjustable, as hereinbefore explained, to conform to the transverse curvature of the work, but are also preferably adjustable bodily toward and from' one another to compensate for diminutions in diameter as they become worn by grinding. In fiew of these conditions of adjustability another novel feature of the invention consists in improved mechanism for operating the trimn'iing knives, which mechanism is organized to partake of the various adjustments of the knives so that the desired operating connection will be maintained under all conditions.

The illustrated organization also includes grinding members for sharpening the trimming knives respectively, and a novel feature concerning them consists in their arrangement by which they are caused to partake of the various adjustments imparted to the trimming knives, whereby the desired lll!) lil relation between the knives and their respective grinders will be maintained under all conditions and not disturbed by adjusting the knives. l

Referring to the drawings,

vFig. 1 is a 'iront elevation partly in section of mechanism embodying this invention in a preferred term, the view including` the working liead, but not the base or trame, ol a trimming machine;

shoe in i'our suc essive positions7 and one o'l the work-engaging abutinents of the movable work-rest insuccessive positions corres pending to those oit the shoe;

Fig. 6 is a. view partly in vertical section and partly in iront elevation showing the angular relation ofthe knives by which the trimming cut is shaped to contorni approximately to the transverse conveXity of the shoe bottom; and

Fig. 7 is a perspective view showing an arrangement oit' pulleys by which a single belt may rotate the two knives in opposite directions.

The two

'trimniing knives

10, 10 are carried by rota-ry shatts 11 journaled in members 12.V .Pulleys 13 are fastened to the 'shafts to be driven preferably in opposite directions by any suitable means such as a belt 1-1, Fig. 7 shows a convenient arrangement ot pulleys by which rotation may be transmitted to both shafts '11 by a single belt receiving power from 'a driving pulley 15. This transmission means includes also two idle pulleys 16 and an idle pulley v17 arranged upon an eccentric collar 18 tastcucd to a stud 19. n. head 2O fastened to the stud 19 provides a handle by which the stud mayV be turned to regulate the tension on the belt. Any suitable means such as a set scre'u7 arranged to engage the stud may vbe provided yto maintain the desired positi o n ot a dj ustment.

The journal members 12. 12 are carried by horizontally adjustable supporting members 2 21 and are connected to said supporting n'icmbers by pivots 22 and by clamping bolts 23. The pivotsl 22 provide tor angular adj ustmentvot the knives which. shown by AFig. 1, are in edge-to-edge relation and yat an angle conforming substantially tothe transverse conveXity ot a shoe bottoni. The clamping bolts 23 extend through curved slotsy or notches in the journal members 12 and are screwed into the supporting members 21. rlhis connection ailords a considerable range ot' adjustment o' the journal members about their respectivo p'vots 22.

The supporting members 21 are provided with dovetail portions arranged to slide in a dovetail guidevay 24 termed in a head portion ot ther trame. A screw shaft' having right and

lett screw portions

26 and 27 entends through the supporting members 21 and cooperates with internal threads to adjust said members in unison toward and trom each other. Endwise movement of the screw shaft is prevented by' collars 28 arranged to engage opposite iaces ot a stationary bracket 29 through which the middle portion ot the shaft extends. rlhe shait is provided with, a knob BO by which to turn it. lhis adjustingmeans provides ior takingl up clearance between the cutting' knives as the latter become reduced in diameter by sharpening.

To protect the operatives fingers 'from touching the knives the mechanisn'i is provided h

stationary guards

31, 31 and movable guard 32, the stationary guards being arranged to cover the outer portions ot theknives while the movable guards are arranged to cover the tor-ward portions, that is, the portions toward the operative. stationary guards are provided with split hub portions arranged to surround and clamp the lower portions ot the journal members 12. Each ot these hub portions is provided with a screw for' producing the clamping action. i

The movable guards 32 are movable to and Ltronrtheir protecting positions, andV stand initially in positions to cover the knives but are automatically retracted from said positions by mechanism hereinafter de* scribed to enable the knives to function when a shoe is presented to them 'for trimming. Each movable guard is connected to the corresponding stationary guard .by a pivot men'iber 3d and theretore partakes of whatever adjustment is imparted to the corresponding knife.

To avoid thenecessity of removing or disturbing the knives tor sharpening, the mechanism is provided with grinding devices arranged to operate on the knives while the latter are in their operative positions. h'ioreover, these grinding devices are arranged to partake of the various adjusting movements ot their respective knives to maintain the desired potential grinding relation. Each grinding device comprises a wheel or disk The lll() lll) occupies a groove 42 in the screw member to prevent the latter from movingendwise.

The relation of the grinding Vdisk to the knife is such that when they are in contact with each otheil the knife rotates the grinder,

' and no additional means is required to effect such rotation. The cutting edge of the knife moves diagonally across the periphery of the grinder at an angle that is sufficient to impart rapid rotation to the grinder.` The grinding effect is therefore produced partly by the rotative. movement of the knife and partly by rotativemovement of the grinder. In practice the grinder Will be normally maintained out of contact with the knife and will be depressed to engage the knife only when the latter requires sharpening.

To use the machine for trimming the bottom of a shoe the operative holds the shoe in both hands bottom up vand With the toe pointed toward the tangent ofV the cutting knives. and then moves the shoe longitudinally into contact with the knives sothat one ofthe latter will trim one side of the toe While the other trims the other side. To do satisfactory Work it is necessary to regulate the closeness of trimming with precision, and this requires not only determining the level of that port-ion of the work that first comes in contact with the knives but also the angle of the shoe with respect to the longitudinal curvature or spring of the bott-om.v It is also necessary to control the position of the shoe with respect to rocking sideuf'ise to insure uniform closeness of trimming bythe two knives.

Accordingly the invention provides various Work-engaging elements constructed and arranged to control manipulation of the shoe so that the trimming Will be uniform and vaccurate and so that it'may be performed rapidly.` These elements includeV a threepoint Work-rest arranged to moveI with the work toward and from the trimming locality and adapted to counteract sidewise tipping of the Work and to impart such longitudinal tipping as may be necessary to Vcausethc trii'uniing to progress in courses parallel to the longitudinal curvature or spring of the shoe bottom. The said three-point Work rest includes a leading abutment l5 and two trailing abutments 46, 4G.V The abutment is arrangedto contact the insole 47 adjacent tothe toe end of the shoe While the abutments 46 are arranged to contactthe overdrawn marginal portion 4:8 of the upper at or near the ball portion. The abutments LlG are preferably in the form of sharp spurs to pierce the bot-tom of the shoe so that vthe latter Will not slip or twist relatively to them. They are preferably carried by a thumbguard 50 arranged to extend across the shoe` and preferably of a length greater than the Width of the shoe and greater than the gap bet-Ween the forward edges of the stationary knife guards 3l. f The guard 50 is adapted to safeguard the operatives thumb from touching the exposed portions of the knife when the shoe is moving toward the latter. In practice it will be convenient for the op erative to graspthe heel end of the shoe Wit-h one hand and the instep portion with the other hand With the lingers of the latter hand under the instep portion and the thumb on the shoe bot-tomy and in front of the guard 50, that is to say, with the Guard between the thumb and the knives. Haviuf:r raised the shoe to engage the abutments lo', 46, 4G, as shown by F ig. 3, but with enough pressure to cause the abutments 4G, 4G to pierce the work, the operative has merely to advancethe shoe, toe foremost, While maintaining sufficient upward pressure to keep it in contact With the three abutments. As the shoe advances it carries the 'guiding abutments toward the knives, the movable knife guards 32 are automatically lifted to uncover the Working portions of the knives, and the three-point Work-rest controls the course of the shoe so that the toe will clear and pass under the knives While the abutments 4G counteract any tendency of the shoe to tip sideWise. The` guard 5() may advance until its tips are arrested by Contact with the stationary knife guards 3l, and if the opeiatives thumb is in front of the guard 50 it is protected from injury by the knife.

The abutment 45 is a relatively thin or narrowY portieri of a link 5l to which the guard 5() is fastened by a clamping screv: 52. A shank portion formed on the guard is arranged between two confronting flan, 53 of the link. The clamping screw e2 extends through a` slot 54 in the.V guard and is screwed into the link, the slot affording a range of vertical adj ustment of the abutn ments 46 relatively to the abutment to adapt the Work-rcst to shoes having various degrees of spring.

The path of movement of the abutment 45 is controlled by a pendular link ivhiie the paths of movement of the abutments 4G are controlled b v a cam slot The link 55 is suspended by a pivot member 5T fastened to the bracket 29, the lower end of .said link being connected. to the'abidment l5 by ar pivot member 5S. The abutment f1.5 swings in an arc the center of which is so located that the abutment reaches its lowest position when about midway between the two hunts of its range of movement and va short distance in front of the-tangent of the knives. Consequently, as the abutment progresses from its lowest plane to its most advanced position it rises to clear and pass over the tangent of the knives as shown by Figs. 4 and 5.

The duty of the abutment is to lead the toe end of the shoe under the knives, and having done so it has no further duty to perform although it'l has a considerable range of movement thereafter' as the shoe continues to advance. The abutments 46, however, remain in engagement with the shoe throughout the entire range of travel and not only continue to counteract any tendency of the shoe to rock sidewise but they tr verse irregular paths'produced by the cam 56 to control longitudimilY rocking of the shoe so that the courses of trimming will conform substantially to the spring of the shoe bottom.

The upper end ofthe link 5l is forked to straddlethe portion of the bracket 29 in which the cam 56 is formeel, and to receive a roller 59 which travels in the cam slot.

1 A tension spring 60 anchored to avhook Gl and connected to the link maintains the work-rest initially in the position shown by Figs 2, 3 and 4. The shape of the cam is such that the abutments 4G move initially in substantially rectilinear and horizontal paths while the abutment 45 has a component of downward movement sufficient to lead the toe of the shoe under the knives; and about the time the toe of the shoe begins to move under the knives the cam 56 gives the abutments 46 a component of upward movement.

Fig. 5 illustrates diagrammatically successive positions of the toe of the shoe in relation to the knives 10, and includes convcntional representation of the abutment 45 in successive positions corresponding to those of the shoe. ik condition shown by this figure is that operative relation between the shoe and the knives begins simultaneously at

points

62, 62 and progresses in opposite directions from each of the said points so that the cuts made by the two knives become merged with each other at the extreme tip of the toe while they progress also toward the other end of the shoe. The folds, crimps or plaits 63 formed inthe overdawn marginal portion of the upper incidentally to lasting are trimmed off flush with the relatively flat portion of the'upper that lies in contact with the insole, the drawing cuts executed by the knives and the angular relation of the knives approximating the transverse convexity of the shoe bottom both contributing to make close trimming possible. If any up or down adjustment of the abutment 45 is necessary to regulate the closeness of trimming it may be produced by turning the eccentric pivot member 57 on which the link 55 is suspended. y

As shown by F ig. l the eccentric pivot member 57 is provided with a shank portion G4 that extends through and has bearing in the bracket 29. lt is provided with a crank 65 by which toturn it. A Vscrew 66 extends through the crank and is provided with a nut 67 which serves as a knob by which to turn the crank and which also serves toV clama the crank at any position at which it may be left. A head G8 formed on the screw 6G is arranged to travel in a T-slot 69 formed in a fixture 70. -The head ('38 and nut 67 cooperate to clamp the crank against the fixture 70.

Referring to the movement of the threepoint work-rest, since the toe of the shoe advances under the knives while the abutment 45 passes over the knives, and since the shoe is therefore deprived of the guiding effect of the abutment 45 before the shoe has completed itsmovcment, the invention provides supplemental guiding means arranged to coopera-te with the abutments 4G during that period when the shoe is deprived of the guiding effect of the abutment 45. The preferred guiding means for this purpose are shown by Fig. 6 and comprise thin plates or shields 7l, 7l. arranged under and in contiguous relation to the knives. These shields .are circular andare arranged in concentric relation to the knives respectively. In Vdiameter they are slightly smaller than theY knives and it is therefore necessary for Vthe edge of the shoe vto move `into lapped relation with the Y knives before it can engage these shields. It follows, therefore, that only the trimmed portions of the work, or at least those portions that have passed the `trimming locality, ever engage the shields 71, all surplus material having been trimmed from those portions that are advanced far enough to engage the shields. The shields are Lpreferably very thin at their rims to permit the desired closeness of trinnning, and graduated in thickness toward. the centers. They are mounted to partake of the various adjustments of which the knives are capable, and consequently they too are adapted to be adjusted atan angle relatively vto each other to` conform approximately to the transverse convex'ity o f the'shoe bottom as shown by Fig. 6.

Since shoes of the. type hereinbefore described are sticky on the bottom in consequence of the use of adhesive substance to hold the ovr-xrdrawnk marginal portion of the upper, the tendency of the adhesive to retard the kmovement of the work may be avoided by arranging the :shields to rotate. As shown Aby the sectional construction in Sie Fig. G, each shield isffastened toa stem 72 and the latter is journaled in a bushing 73 inserted into the .shaft- 11. A head 7a secured on the inner end ofthe stem contines the latter in the bush ng while the bushing is confined by lapped relation with the body of the knife. The screwsf which 'tasten the knife to the shaft thus serve 'to maintain the assemblage intact while .the shield and the stem are free to turn in response to the frictional demands ofthe work engaging the shield.

It has been stated that the working portons of the knives are initially covered by the movable guards 32 and that the latter are auton'iaticallyy retracted to expose the knives when a shoe is advanced to the ,trimming locality. The mechanism for effecting retraction of thev guards 32 is arranged to be operated by the Vthree-point work-rest, or, more specifically, by the link forming a part of said work-rest. As shown by Figs. 2, 3 and 4, a link 76 is pivotally connected to the link 55 and to aflever 77. This lever is connected to thebracket 29 by a fulcrnm member 78 and is arranged to act against the under surface of a lever 79 which is also connected to the bracket 29 by a'fulcrum member 80. A link 81 pivotally connected to the free end of the lever 7 9` is suspended so that its lower end hangs between the movable guards 32.v A. pin 82 is rigidly fas-` tened to the lower end of the link and projects in vopposite directions therefrom to engage the guards 32, the guards having holes 83 through which the ends of the pin project. This mechanism is so organized that the three-point work-rest, in moving toward the trimming: locality, causes the lever 77 to raise the lever 79- and with it the guards 32. Thisliftng of the guards occurs during the `first stages of movement ofthe three-point work-rest and uncovers the working portions of the knives before the toe of the shoe has reached the trimming locality. VTo avoidfurther upward movement of the guards iafter they have risen far `enough to afford access to the knives the lever 79 is provided with a` curved notch or recess S5 in which the effective portion of the lever 77 may travel without causing movement of the lever T9. i

Since the guards32 partake of the various adjustments ot the knives toward and from each other and otl'ierwise to vary their angular relation, and since the link 8l for raising the guards does notfpartake of suoli adjusting movements the holes 83 through which the pin 82 extends are preferably made large enough to provide for such adjustments without producing binding of the pin in the holes, the pin being long enough to maintain connection with the guards when the latter are as far apart as 1t 1s ever necessary to separate them. Each guard 32 isprovided with an ear 86 at its free end to rest on the correspondingr stationary guard 3l when the movable guard is in its lowest position.

.Having thus described Y my invention, wh at l claim as new and desire to secure by L itters .Patent ofthe United States is:

l. A machine of the character described comprising cutting means arranged to trim surj'ilus material projecting from a convex surface, said means being regulatable whereby its effective shape is variable and approximately conformable to the convexity of said surface.

2. A machine of the character described comprising rotary cutting means arranged to trim surplus material lying on and projecting from a surfaeeof an article of work, and adjustable means arranged to coliform the effective shape of said cutting means approXimately to a curvature of such surface.

lkmachine of the character described comprising a plurality of rotary powerdriven disk knives arranged out of contact with each other to operate individually but simultaneously on tner bottom of a :ia i shoe to trim surplus material therefrom.

ll. A machine of the character described comprising a plurality of rotarypower.- driven disk knives arranged to function in edge-toedge relation to trim surplus material from the bottom of a lasted shoe, said knives heilig relatively adjustable to conform 'collectively to the transverse curvature of the shoe bottom. i

A machine of the character described comprising two angularly adjustable rotary disk knives arranged to operate in edge-toedgo relation to trim surplus material from the bottom of the toe and sides of a shoe.

(l. A machine of the character tuiscribed comprising two rotary powerdriven disk knives arranged to function simuitanconsti;l but individually one to trim surplus material lying onthe margin of the bottom of a lasted shoe while the other trims surplus material lying elsewhere on said margin. j 7. A machine of the character cescribed comprising two rotary ,disk knives arranged to trim surplus material from the bottom of the toe and sides of a lasted shoe, said knives being relatively adj stable to conform the angle of their cutting edges ap proxin'iately to the convexity of the shoe bottom. V y

S. A machine of the character described comprising cutting means arranged to trim surplus material from the bottom of a lasted 'shoe presented toe foremost thereto, and guiding means yarranged to be engaged and moved toward'said cutting means by the bottom of the shoe, said guiding means 'being constrained'to supplementthe longi-A tudinal movement of the shoe with a component of other movement to cause'the trimming to proceed along a curvilinear course substantially parallel to the longitudinal curvature of the shoebottom.

9. A machine of the character described comprising cutting means adapted to trim surplus material from the bottom of a lasted shoe, and means including bodily movable abutments arranged to engage the bottom of the shoe at three separate points to control manipulation with respect to rocking while the shoe is undergoing trimming by said cutting means.

1 0. A machine of the character described comprising cutting means adapted to trim surplus material 'from the bottom of a lasted shoe, three bodily movable abutments constructed and arranged to have separate points of contact simultaneously with the bottom of the shoe, and means lor giving two vof said abutments dissimilar components ot movement to control manipulation of the shoe during' the trimming thereof.

11. A machine of the character described comprising cutting means adapted to trim surplus material from the bottom of a lasted shoe, and means including a bodily movable work-rest arranged to counteract sidewise rocking and to produce lengthwise rocking of the shoe so that the course of trimming vill curve `according to the longitudinal curvature oit the shoe bottom.

12. A machine of the character described r comprising two rotary disk knives arranged to trim surplus material from the bottom of alasted shoe and arranged at an angle con- Jiiorming substantially to the transverse convexity'oil the shoe bottom, and means constructed and arranged'to control longitudinal motion of the shoe so that the trimming cuts ol said knives will follow courses substantially parallel to the springer the shoe bottom.

13. A machine ofthe character described comprising trimming means including two oppositely driven rotary disk knives for eXeouting drawing cuts simultaneously to trim surplus material from opposite margins of the bottom of a lasted shoe, and means constructed and arranged to control manipula-V tion ot the shoe so that the trimming cuts of said knives will follow courses substantially parallel to the spring of the shoe bottom.

14. A machine of the character described comprising trimming means constructed and arranged to execute two drawing cuts simultaneously to trim surplus material from op* posite margins 'of the bottom of a lasted shoe. said means being arranged to makesaid cuts at an angle conforming substantially to the transverse convexity of the shoe bottom, and means for controlling longitudinal movement ot the shoe so that said cuts will follow courses substantially parallel to the spring of the shoe bottom. Y

15. A trimming machine comprising a plurality of rotary disk knives arranged to work in edge-wedge relation, said knives being relatively adjustable to vary the angular relation of the cuts made by them, and means for operating said knives in their various angular relations.

16. A trimming machine comprising two cooperative rotary disk knives arranged in edge-to-edge relation to trim surplus material from the bottom' of the toe of a lasted shoe, stationaryv guards arranged adjacent to said knives respectivelyl and behind their cutting edges to engage the trimmed portion of the shoe, and movable means constructed and arranged to determine the closeness of trimming before the trimmed portion reaches said guards. l

17. A machine of the character described comprising cutting means adapted to trim surplus material from the bottom of a lasted shoe, and a movable work-rest comprising three separate abutments arranged to engage the shoe bottom and onel of them being formed to pierce the shoe bottom to obtain a hold thereon, said abutments being adapted to control manipulation of the shoe with respect to rocking sidewise and lengthwise.

18. A machine of the'character described comprising cutting means adapted to trim surplus material from the bottom of a lasted shoe, and a movable workrest comprising three separate abutments arranged to engage the shoe bottom in Vtriangular relation, two of said abutments being formed to pierce the shoe to prevent twisting or skewing thereof while all three of them are effective to control the shoe with respect to rocking.

19. A machine of the character described comprising cutting means adapted to trim surplus material from' the bottom of a lasted shoe, a movable guard constructed and arranged to extendV across the shoe bottom between the operatives point of grasp and said cutting means, and means for guidingsaid guard toward and from the cutting means.

20. A machine of thecharacter described comprising cutting means adapted. to trim surplus material from the bottom of a lasted shoe, a movable guard constructed andarranged to extend across the shoe bottom between the operatives point of grasp and said cutting means, means for guiding said guard toward and from said cutting means, and a sharp spur carried by said guard to pierce the shoe bottom so that the gua-rd will be moved toward said cutting means by the shoe.

21. A machine of the character described comprising cutting means adapted to trim surplus material from the bottom of a lasted shoe, stationary means arranged to cover opposit@ Sides of said cutting means to prevent injury to the operative but having a gap to admit the work to be trimmed, a guard constructed and arranged to extend across the shoe bottom and to move with the shoe, and means for guiding said guard toward the trimming locality, said guard being adapted to bridge said gap and to be arrested by engagement with said stationary means.

A machine of the character described comprising cutting means adapted to trim surplus material from the bottom of a lasted shoe, a movable guard constructed and arranged to. extend across the bottom of a lasted shoe between the operatives point ot grasp and said cutting means, means for guiding said guard toward and from said cutting means, and means carried by said guard to prevent twisting or skewing motion of the shoe.

23. A machine of the character described comprising cuttingmea'ns adapted to trim surplus material from the bottomlof a lasted shoe, a movable guard constructed and arranged to extend across. the bottom of a lasted shoe between the operatives point of grasp and said cutting means, means for guiding said guard toward and from said cutting means, and work-piercing,means ried by said guard to prevent twisting sidewisc rocking of the shed 21. A trimming machine comprising two cooperative rotary diskknives arrnged in edge-to-edge relation to trim surplus material from the bottom of a lasted shoe, and a movable work-rest comprising three separate abutments arranged to engage the shoe bottom, two of said abutments being arranged to engage the shoe substantially abreast oi each other to counteract sidewise 'rocking while the other is arranged nearer' the knives and in register with the substantially tangential point of their cutting edges.

A machine of the character described and rcomin'ising cutting means adapted to trim surplus material from the bottom of a lasted shoe, and a movable work-rest arranged to impart to the shoe a component ol length! wise rocking as the shoe is moved lengthwise in operative relation to said cutting means, to guide the trinnning Vcut along a course substantially parallel to the longitudinal curvature, oi the shoe bottom.

2G. A machine of the character describeifl comprising cutting' means adapted to trim surplus material from the bottom of a lasted shoe, a movable work-engaging' member ar ranged to pass and clear the Icutting edge to guide the toe end of the shoe to the latter, and movable work-engaging means arranged to cooperate with said member to guide the shoe and control it with respect to rocking.

27. A machine of the character described comprising cutting means adapted to trim surplus material from the bottom oi a lasted shoe, a movable Work-engaging member ar` Vplm-ality of work-enf of trimming1 ranged to pass and clear the cutting edge 'to guide the toc end of the shoe to the latter, movable work-engaging means arranged to cooperate with said member to gui! the shoe, and means behind the cuttim,V edge t guide the shoe by engag .ment with the portion that has passed said edge.

28. A machine of the character described comprising cutting means adapted to trim surplus material from the bottoni of a shoe, a worleengziiging member ari-ged to swing about an axisto guide the toe end of the shoe to said cutting means, said member being ar anged also to pass and clear the cutting edge, other worleengaging means coupled to said member to more in uni i therewith, and means for guiding' said other means to produce a component or' movement whereby the trimminb is caused to parallel the spring of theshoe bottoni.

29. A machine ot' the kcharacter descrfbcd coi'nprising cutting means adapted to trim surplus material from the bottom ot a lasted shoe, a work-engaging member arranged to swing about *1 axis to guide the toe end of the last said cutting ineens, and other work-guiding means including a link pivotally connected to said memberrto move in unison therewith, wo1'l:-cngaging abutments carried by said link, and a cam for guiding said link toproduce a component of movement whereby the trimming is caused to parallel the spring of the last.

i 30. A machine of the character descrii'ied comorising cutting lmeans adapted to t surplus material ,from the bottom of a la, l shoe, and work-guidii means co1n} ri=ir o a ring abutmei pled to move in unison and guided to curved paths ter guiding the course i substantiall*v parallel Vto the spr the 'shoe bottom.

3l. A machine ofthe character described Vcomprising` cutting means adapted to trim surplus material 'i'rom the bottom of a lasteil shoe, and workuiding means Icompri ing a plurality of work-engaging abutmcns niet# able in unison with the shoe and guider" curve the course of trimming sub.. anti., to parall l the spring o t the 32. A machine et the ch .i comprisingcuttingmeans ai l,ted to trim surplus material from the bottoni et a lasted shoe, a work-engaging abutment movable in an arc to guide the toe end oi" the shoe to said cutting means, and other VTorli-engaging means for guiding the shoe so that the course will parallel the spring ot the shoe bottoni.

A machine of the character described compr. ing cutting` means adapted to trim surplus material from the bottom ol a lasted shoe, and work-guiding means including a plurality of work-engaging abutments mevable in unison but having dissimilar paths et reo l li) lid of the shoe nearer the heel end.

35. A machine of the character described comprising rotary twin disk knives arranged in edge-to-edge relation to trim surplus material from the bottom of a lasted shoe, and Work-guiding means including three movable abutments arranged to engage the bottom of the shoe in triangular relation, one of said abutmentsbeing in advance of the others and arranged to guide the toe end of the shoe to said knives and then to pass between the cutting edges of the knives to clear the latter. n

36. A machine of the character described comprising a knife formed and operated to execute a drawing cut and arringed to trim lumps from the overdrawn marginal portion of an upper on the bottom of a lasted shoe,

Va thin shield arranged inv confronting irelation to the body of said knife to engage the trimmed part of the work, the cutting edge of said knifebeing in front of the front edge of said shield, and movable work-engaging means constructed and arranged to guide the 'work to said knife and to cooperate with said shield to control the course of trimming.

37. Aniachine of the character described comprising cutting means adapted to trim surplus material from the bottom of a lasted shoe held in the hands, movable means arranged initially to cover said cutting means, and means movable by the shoe to retract said covering meansfrom said cutting means.

8S. A machine of the character described comprising relatively adjustable cutters arranged to operate simultaneously on a shoe, movable guards arranged to stand initially in front of said Cutters respectively and in the path of the work, said guards beng arranged to partake of relative adjustment of said cutters, and means arranged to be 4moved by the work to retract said guards from the path of th-e work.

39. A machine of the character described comprising a plurality of disk knives arranged to trim surplus material from the bottom of a lasted shoe, said knives being adjustable relatively to each other, stationary guards arranged to cover portions of said knives respectively and topartake of to trim surplus material from the bottom of a lasted shoe, said knives being relatively adjustable to various angles to approximate the transverse convexity of the shoe bottom, and shields arranged in contiguous relation yto said knives respectively to steady the yshoe against rockingsidewise, said shields being arranged to partake of angular adjustments of their respective knives.

lll. A machine of the character described comprising rotary twin disk knives arranged to trim surplus material from the bottom of a lasted shoe, shields arranged in contiguous relation to said knives respectively to guide the shoe by engagement with the trimmed portion of the bottom, a movable member arn yranged to engage the shoe bottom near the rtce end to lead the latter to said shields, and

movable means arranged to engage the slice bottom to cooperate first with said member and afterward with said shields to control manipulation of the shoe. e

a2. A machine of they character described comprising a frame, Aa bearing member secured thereto, a shaft journaled .in said bearing member, a disk knife carried by said shaft, said bearing member being adjustable to tilt the axis of said knife, and a grinding disk carried by said bearing member to sharpen said knife and to partake of tilting adjustment thereof, said grinding disk being also adjustable -crosswise of the cutting` edge of said knife.

48. machine of the character described comprising a frame, supporting members mounted thereon to be adjustable toward and frein each other, journal members carried by said supporting members respectively and larranged to be adjustable to various angles relatively to said supporting members, rotary trimming knives journaled in said journal members respectively to partake of angular adjustment of the latter and of adjustment of said supporting members, and grinding devices arranged to sharpen said knives respectively and mounted on said journal members to partake of whatever adjustment is imparted to the knives. j y

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

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