US1029842A - Machine for operating on boots and shoes. - Google Patents

Description

' L. J. BAZZONI. MACHINE FOR OPERATING 0N BOOTS AND SHOES. APPLIOATION FILED APB.11,190B.

1,029,842 Patented June 18, 1912.

2 SHEETS-SHEET 1.

COLUMBIA PLANOGRAPH 20., WAHINOTON, D. C.

L. J. BAZZONI. MACHINE FOR OPERATING 0N BOOTS AND SHOES. I APPLICATION FILED APR.11,1908. 1,029,842, Patented June 18, 1912.

2 SHEETS-SHEET 2.

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ITEM %TATEE LE-Wis J. BAZZONI, or SWAMPSCOTT, MASSACHUSETTS, assicnon To UNITED snon MACHINERY COMPANY, OF PATER SON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

MACHINE FOR OPERATING ON BOOTS AND SHOES.

Specification of Letters Patent.

Patented June18, 1912..

Appfication filed April 11, 1908. Serial No. 426,516.

for Operating on Boots and Shoes, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates primarily to ma-- that the edge of the insole shall correspond both in outline with the edge of the last and also in bevel or inclination with the contour of the side of the last adjacent to its bottom. According to the usual practice, in securing the insole to the last its toe end is located accurately in proper position with reference to the toe end of the last. By reason, however, of variations in the qualities or characteristios of insoles or of variationsin the preliminary treatment to which they are subjected, they are elongated to a variable extent as a result of the channeling operation so that, when an insole is applied to the last with its toe end registering therewith, its heel end will usually not register exactly with the heel end of the last, although the insole before it was channeled may have corresponded exactly with the outline of the bottom of the last. Even if an attempt were made to allow for this elongation by cutting out the insole a corresponding amount shorter than the last,

nevertheless by reason of the variations, just referred to, the heel end of thesole would not in all cases register exactly with the last. Therefore, at'least upon the better grades of welt shoes, it is now the custom to trim the heel end of the insole by a hand knife after the insole has been secured to the last.

Although a skilled Workman may be able quickly, the trimming is usually inaccurate and lacking in uniformity. Where the in sole is trimmed by hand the angle of cut is variable being often such that the trimmed edge is approximately perpendicular to the faces of the sole so that the edge of the sole is not inclined to correspond with the sides of the last and the result is that when the counter and upper materials are drawn over the'last and secured to the insole a crevice is left upon the inside of the shoe between the end of the insole and the lining.

The principal object of the present invention is to provide a machine for performing the operation of trimming the heel end of an insole quickly and accurately according to the shape of the last.

The invention, in one aspect therefore, comprises means for supporting a last, with an insole secured thereon, and a knife or other cutting device, said last and knife being relatively movable to trim the sole and being so supported as to vary automatically the inclination or bevel of the out.

A further object of the invention is to make the inclination of out in the trimming of the heel end of an insole such that the edge of the insole will either correspond exactly to the inclination of the sides of the last or will be slightly more sharply inclined so that the edge of the upper side of the insole, in the normal position of the shoe, will bear against the lining, thus leaving no space or crevice visible at the heel between-the sole and lining.

In the particular machine in which I have already embodied my invention, the last is clamped so that it and the trimming knife may be relatively rotated about an axis passing approximately through the center of its heel end. The trimming knife is mounted in a knife block which is capable of swing ing about a horizontal axis and which bears upon the side of the last at two separated points, one being approximately at the bottom of the last and the other at a distance therefrom. By this construction, the angle at which the edge of the insole is. cut is controlled wholly by the last and this angle is preferably such that the edge of the insole corresponds in inclination to the sides of the last or inclines inwardly therefrom in the direction from that face of the insole which is uppermost in the finished shoe to the lower or opposite face. In the construction about to be described in detail, the knife block is carried in a holder which in turn is pivoted in a carrier mounted to swing upon an axis so that as the last and knife are relatively turned to trim the end of the sole the knife may swing in and out according to the outline of the last, means being provided for holding the knife and knife block against the last.

The machine in which the mechanism above described is embodied may be operated either by hand or by power and either the last or the knife may be rotated to transfer the point of operation around the work.

In its preferred embodiment, the machine is substantially automatic in its operation. Accordingly, the present invention comprises also a machine having a work support, means for operating upon the work, and means for clamping it in combination with means operated automatically by the insertion of the work into the machine for starting the machine and actuating the clamping means.

Another feature of the invention involves means acting automatically at a predetermined point in the cycle of operations to release the clamping device and either to effect the stopping of the machine or to cause the work to be expelled from the machine or, preferably, to perform all of said functions. Conveniently, also, the arrangement will be such that these movements will take place as the knife, or other means for operating upon the work, returns to its initial position.

After the knife'has been caused to trim one end of a solo as above explained, and while the knife is returning to its initial position, it is desirable that it should be held out of contact with the sole and last or, in general, the work. Hence, a further feature of the invention comprises means for main taining the knife in operative position with reference to the work as the cutting point is transferred around it and means for maintaining the knife in inoperative position during its return movement.

In 'the specific construction hereinafter described, there is provided upon the knife carrier a movable latch arranged adjacent to a plate or table having one or more stops in the path in which the latch moves while the knife is being carried around the sole.

This latch is constructed and arranged to move the knife away from the sole into inoperative position by the engagement of the latch with one of the stops, the latch holding the knife retracted until the knife carrier starts to move again in the direction to trim a sole at which time the latch is moved by engagement with another step to permit the knife to take its operative position.

While certain features-of the invention, such as the automatic positioning of the knife angularly, are limited to use in a machine for trimming asole attached to a last,-

other features which are embodied in the automatic machine hereinafter described may readily be applied to machines for other classes of work, such as trimming soles or heels to a flat pattern.

In addition to the features above specifically referred to, the invention comprises also certain other combinations or arrangements of parts, and details of construction hereinafter described and claimed.

Referring to the accompanying drawings,Figure 1 is a perspective View of a hand operated machine embodying the invention, a last with an insole attached being indicated by dotted lines; Fig. 2 is a side elevation with certain parts broken away; Fig. 3 is a detail of the knife block and its holder; Fig. i is a side elevation of a poweroperated automatic machine also embodying the present invention; Fig. 5 is a section taken on the line V-V, Fig. 4, and showing the driving shaft and actuating mechanism for the machine; Fig. 6 is a sectional plan taken on the line VIVI, Fig. I; and Fig. 7 is a perspective view of the knife carrier, shown in Fig. 4:, and the devices by which it is moved toward and from operative position.

Referring to the machine of Figs. 1 to 3, the head or frame 2 may be mounted upon a bench or upon a stand in any usual or suitable manner. On the base of this frame is a boss 4 within which is mounted a spindle 6 fitted to move both longitudinally and rotatively in the boss. Upon the enlarged head 12 of this spindle 6 is a last support 8 provided with a projecting pin 14L adapted to enter the hole in the cone of a last L.

The support 8 is provided also with an adjustable or other rest 16 to serve as a supporting surface for the last, which also rests at 18 upon the support 8. In alinement with the axis of the spindle 6 is a spindle 24, shown as non-rotatable, provided at its lower end with a self-adjusting foot 26 to bear upon the insole I secured to the last L. A trimming knife or blade 30 having a cutting edge 31 is clamped in a block 32 which is pivotally mounted upon a pin 34 in a holder 36, one side of the knife being substantially flush with the upper portion of the front face of the block. A guide 37 leads away the shaving or chip removed in the trimming. The lower end of this face of the block is provided with a forwardly projecting lug 38 adapted to bear against the side of the last L. The bearing face of this lug 38 is preferably conveXly curved with the point 40, which projects forward to the greatest extent, preferably slightly back of the cutting edge 31 of blade 30. Since the block 32 at approximately the upper edge of its front face bears also against the last L or the heel plate H set therein, the block is automatically positioned by the last so that the blade is inclined inwardly, as shown in Fig. 2, at an angle somewhatsharper than the inclination of the last so that while the knife is trimming the edge of the insole I it will be cut to an inclination sharper than the inclination of the last so that the lining, counter and other upper materials will fit closely to the edge E of the insole which is uppermost in the normal position of the'shoe,'thus avoiding any visible space between the lining and the sole edge.

The holder 36, which is bifurcated at its lower end to receive the block 32, is provided with a stud 44 by which it is pivoted at the lower end of a carrier 46, being held in place by a nut 48. The carrier 46 at its upper end is pivoted at 50 to a fixed collar 52 upon spindle 24. Within a hole extending through the carrier 46 is a spring 54 secured at one end to the sleeve 52 and at the other end to a pin 56 threaded to receive a nut 58 bearing against a washer which rests against the outside of carrier 46. The knife 30 and block 32 are held up against the last by this spring 54, the tension of which may be adjusted by nut 58. One end of a spring finger 59 secured to carrier 46 presses downwardly upon the sole near its edge just in advance of the knife and prevents the sole from rising during the trimming operation. If the heel ends of the last and sole are at a greater distance from the axis of ro tatio-n than the sides, the block 32 and the acting portion of knife 30 may move upwardly as they are carried away from the axis of rotation by swinging of carrier 46 about pivot 50; In order, however, that approximately the same portion of the knife may be operative throughout the entire operation of trimming the heel end of the insole, the last is so supportedupon the plate 8 through the adjustment of rest 16 that it is inclined downwardly and forwardly sufliciently to compensate approximately for this movement of the knife and knife block. Inasmuch as it is necessary to trim only that portion of the sole in the rear of the widestpart of the heel end, the axis about which the last is turned preferably will intersect the sole at a point only slightly, if any, farther from the rear end than from the sides of the heel port-ion so that there will be little movement of the knife toward or from the axis of rotation. By arranging the axis of stud 44 to intersect the axis of pivot 50, the knife holder will turn easily about stud 44 and maintain the knife in position to cut properly and with this construction the knife will neither dig into nor run away from the last and insole during the trimming operation. For clamping the last between the plate 8 and the foot 26 a treadle, not shown, is connected by a rod 60 to a lever 62 pivoted at 64 in the base of frame 2. The rear end of this lever engages the lower reduced end of spindle 6 while a spring pressed pin 66 tends to hold the rear end of the lever in depressed position. A spring 70, secured to support 8 at one end and to the frame 2 at the other, tends to rotate spindle 6 to its normal position, shown in Fig. 1.

In operation, after the insole I has been secured to the last L as explained above, the last is placed upon the support 8 with its hole over the pin 14 soas to be supported by rests 16 and 18. Thereupon, by the depression of the treadle, the spindle 6 is raised to bring the sole firmly into engagement with the foot 26. The knife block 32 will be held against the last by spring 54, its position being controlled automatically by the last. The operator will then take hold of the last and turn it in the direct-ion of the arrow shown in Fig. 1 through an angle of approximately 180 during which movement the support 8 and foot 26 will turn with the last, and the knife 30, being held with carrier 46 against rotation, will trim the sole accurately to the last, the edge of the sole being given an inclination varying according to the inclination of the last,

above explained.

Referring now to the machine shown in Figs. 4 to 7 74 represents the frame which may be supported from the horizontal plate 7 6 secured to a bench or upon any suitable stand. Slidable in a recess in this table 7 6 is a bracket 7 8 which may be secured in adjusted position by screw 80 and which is provided with a recessed sole support 82 of a shape to bear against the lower side of the heel end of a sole mounted upon a last L at a short distance from its margin. Coiiperating with the support .82 is a clamping foot 84 pivotally mounted at the lower end of a rod 86 which is mounted to slide in a standard extending from table 7 6. A lever 88 is connected atone end to the rod 86 and at the other end to a similar rod 90 which has in its lower end a recess 92 into which extends the lower reduced end 94 of a slidable rod 96. A spring 98 is interposed between rods 90 and 96 so that the upward movement of rod 96 is yieldingly transmitted to foot 84, thus providing for variations in the height of lasts. A pin and slot connection at 99 between rod 90 and the end 94 of rod 96 limits their relative movement. The rod 96 is raised by an edge cam 100 secured to the driving shaft l02and thus the foot 84 is moved to clamp the last and its attached sole yieldingly against the support 82. Either by its own weight or by other con venient means such as a spring the lower end of the rod 96 is maintained in contact with the cam.

Mounted to rotate freely upon the driving shaft is a belt pulley 103 which constitutes one member of a clutch of a well known type. The other member 10 1 of the clutch is splined upon the driving shaft and provided, as usual, with a friction surface adapted to engage a corresponding surface of the belt pulley so that when the clutch member 104 is moved longitudinally upon the driving shaft to bring the friction surfaces into engagement the machine will be started into operation. Between the clutch members 103 and 10 1 is interposed a spring 106 which tends constantly to separate the members and thereby to render the clutch inoperative.

For forcing the clutch member 104 into frictional engagement with its cotiperating member 103 a lever 108, pivoted at 110 to the frame, has its lower end formed as a wedge and interposed between the end of the hub of clutch member 104: and cam 1.00, as shown in Fig. 5. The upper end of lever 108. is joined by a pin and slot connection 111 to a slide 112 at the forward end of which is adjustably secured a forked member 114 which is arranged to be engaged by the last L when the latter is placed in the machine. This forked member 114: serves not only to position the work but through it the machine is started, for as the last is inserted into the machine, the rest 11 1 is pressed rearwardly and through the connections just described the clutch is rendered operative. A pin 115 passing through a slot 116 in the slide limits its forward movement under the influence of a spring 118.

Referring now to the mechanism for carrying the knife around the sole, a crank 120 at one end of driving shaft 102 is provided with sliding block 122 movable longitudinally in the slot 12st of one arm 126 of a bell crank lever pivoted upon the frame at 128. The other arm 130 of the bell crank lever is provided with a rack 132 the teeth of which mesh with the teeth of a bevel. pinion 13a rigidly secured to a sleeve 156 rotatable upon an axis 138 substantially in alinement with rod 86, this axis 138 and the axes of rods 86, 00, and 96 all being in a plane perpendicular to the driving shaft 102. Pivoted to the sleeve 136 at 140 is the knife carrier 142 in which the knife 30 is supported substantially as shown in Figs. 2 and 3. A spring 14 1 is interposed between a shoulder upon the knife carrier and an arm 1 16 projecting laterally from sleeve 136 and tends to hold the knife against the sole.

The crank 120 will move through considerably more than one-half of a revolution. in carrying the knife around the heel end of the sole upon its cut-ting stroke, while the remaining portion of one revolution will be utilized for returning the knife at a somewhat greater speed to its initial position. During this return movement the knife will preferably be drawn away from the sole a counterweight 154: at its lower end and a lug 156 and a roll 158 at its upper end, the arrangement and proportions of the parts being such that the roll will normally be maintained lightly in contact with the under side of table 7 6 or at a slight distance therefrom, as indicated in Figs. 4 and 7. Preferably the circumference of the roll 158 will extend slightly beyond the lug 156 at the upper end of the latch so that the roller, but not the lug, may engage the plane surface of the table. Two steps 160 and162 are arranged upon the lower side of the table in the path'of lug 156 so that the lug will engage and pass under one or the other of these stops at the limit of the movement of the knife carrier 14:2 in either direction.

While the knife and knife carrier are moving in a direction to trim the sole, as indicated by the arrow in Fig. 7, the knife block 32 will be maintained in engagement with the last through the action of spring 14 1. The axis of the roll 158 will be in the rear of a vertical line passing through the pivot 152 but counterweight 154 will tend to maintain the roll just below or lightly in engagement with the under side of the table. At this time the latch 150 will occupy a position corresponding to that indicated in Fig. 7 and will not interfere with the in and out movements of the knife and knife block. As the lug 156 passes under and just beyond stop 162 the upper end of the latch will be tipped still farther backward, after which the knife carrier by the continued rotation of driving shaft 102 in the direction indicated by the arrow in Fig. 1 will return to its starting point. At the beginning of this return movement, the stop 162 by its engagement with lug 156 will turn the latch 150 about its pivot until a shoulder 16 1 of the latch comes into engagement with a stop 166 projecting outwardly from'the knife carrier 1 12. At this time the axis of roll 158 will have been moved by the turning of the latch to the opposite side of the vertical line passing through the pivot from that indicated in Fig. 7. "While the latch is being moved to this position by stop 162, the knife carrier 1&2, since the roll 158 engages the under side of the table, will be tilt-ed about pivot 140 against the resistance of spring 141, drawing the knife and knife block away from'the work. Preferably, with the parts in this position, a line joining the axes of pivot 152 and roll 158 will be at an angle of about 5 to the vertical, that is; at such an angle that the comparatively light counterweight 154: will be insufficient to return the latch to the position indicated in Fig. 7 against the resistance of spring 144. The friction of the table upon the roll 158 will tend also to maintain. the latch in this nearly vertical position while the knife is returning to its starting point. Just before.

this point is reached, lug 156 will engage and pass under stop 160, the knife carrier 142 being turned still farther downwardly around its pivot against the resistance of spring 144. After the lug has passed the stop, the work may be withdrawn from the machine and the cycle of operations will thus be completed. It will be noted that the knife and knife block will remain in their retracted or inoperative positions while the machine is at rest but that as soon as the machine is started again stop 160 acting upon lug 156 will throw the latch into the position indicated in Fig. 7.

The operation of the machine illustrated in Figs. 4 to 7 may be briefly described as follows: When the machine is at rest the lower end of rod 96 will lie in the deepest part of the recess in the edge of, cam 100, the clamping foot 84 will be in its highest and inoperative position, and the knife carrier 142 will be retracted and at one limit of its movement around the work support 82 so that a last may readily be placed against rest 114, which will be in forward position, with the clutch members 103, 104 out of engagement. The arm 126 of the bell crank lever is of a weight sufficient to carry the arm 126 when the clutch is released to the lowest position permitted by crank 120 and sliding block 122. Hence, in the position of rest the slot 124 of the bell crank lever will be substantially at right angles to crank 120. With the parts in this position, the operator will insert the last L, with the insole I attached, between the arms of work rest 114 with the bottom of the insole bearing upon support 82. Pushing the last inwardly, he will press the rest 114 back to force the clutch members 103, 104 into operative engagement, thus starting the rotation of the driving shaft, whereupon the earn 100 will cause the foot 84 to clamp the last and the knife carrier will be carried around the sole in the direction indicated by the arrow in Fig. 7 During the first part of this movement, the knife 30 will be moved by spring 144 into operative position by reason of the release of latch 150 by stop 162, after which the position of the knife will be controlled automatically by the last as already fully explained. The knife will complete the trimming of the heel end of the sole as the crank arm 126 reaches its highest position and, as it starts to return, the latch 150 will be tilted by stop 160 to and a little beyond vertical position and, through engagement of roll 158 with the lower side of the table 76, the knife will be retracted and maintained in inoperative position while the crank 120 completes its revolution and brings the various parts back to initial position. vVhen the revolution of the crank is nearly completed, the lower end of rod 96 will enter the depression in cam 100, thus releasing clamp 84 and permitting spring 118 to throw the work rest 114 forwardly to expel the last from the machine. Ordinarily the operator will continue to hold the last in his hands during the trimming operation and therefore as soon as he sees the presser foot 84 rise or feels the force transmitted to the last from spring 118, he will assist in withdrawing the last from the machine and prevent it from falling. Upon the forward movement of the rest 114, spring 106 will effect the separation of the clutch members 103, 104 and the machine will come to rest, thus completing a cycle of operations.

While, as above suggested, certain features of the invention are limited to the trimming of a sole secured to a last, it will be noted that other features which are embodied in the machine of Figs. 4 to 7 are applicable also to trimming, or otherwise operating upon, soles, heels or other parts of a shoe and particularly when atool or device operates progressively around one end of a shoe. Therefore, while certain specific constructions have been described in detail in order fully to explain the invention, it is to be understood that various changes in detail and modifications of arrangement may be made according to the particular wort to be done without departing from the scope and spirit of the invention as defined in the claims.

Having described my invention, what I claim as new and desire to secure by Letters Patent ofthe United States is 1. In a machine of the class described, means for supporting a last with an insole attached thereto and a cutting device, said last and device being relatively movable to trim the sole and said device being tilted automatically by the last which thus determines the inclination or bevel of the cut. 7

2. In a machine of the class described, means for supporting a last with a sole attached thereto, a cutting device, said last and device being relatively movable to trim the sole, and means constructed and arranged to engage the last at a plurality of separated points, one adjacent to and one at a distance from the bottom of the last, and thereby to determine the inclination or bevel of the cut from the contour of the last.

3. In a machine of the class described, means for supporting a last with a sole attached thereto, a support and a cutting device pivoted to said support and constructed and arranged to tilt about an axis lying adjacent to the last and substantially parallel able about two axes with reference to said support, and controlled in position wholly by the last, said last and knife being-relatively movable both to trim the sole and, by movement about the said axes, to adjust their relative position according to both the horizontal and the vertical contours of the last.

. 5. In a machine of the class described, means-for supporting a last with a solo attached thereto, a flat trimming knife, said last and knife being relatively movable to trim the sole, and a pivoted block in which said knife is fixed, said block having a plurality of separated bearing points constructed and arranged to engage the last for positioning the knife angularly, one of said points lying adjacent and one at a distance from thebottom of the last.

6. In a machine of the class described, means for supporting a last with a sole secured thereto, a trimming knife movable about an axis, and a carrier pivotally mounted upon an axis substantially intersecting the first-mentioned axis, said knife being constructed and arranged to swing with reference to the carrier about a plurality of axes, such swinging being controlled wholly by the last.

7. In a machine of the class described, a work support and a knife relatively movable toward and from each other and for carrying the knife around the work, means tending to maintain the knife in operative position with reference to the work as the cutting point is transferred around it in one direction, and means for maintaining the knife in inoperative position during its return movement in the opposite direction.

8. In a machine of the class described, a work support, a knife and means for carrying it around the work, means tending to maintain the knife in operative position, and automatic means for moving the knife away from the work at the end of its cutting operation and for maintaining it outof engagement with the work during the return movement of the knife.

9. In a machine of the class described, a work support, a knife movable to and from operative posit-ion with relation to the work, means for carrying the knife around the work and for returning it to its starting point, and automatically actuated means for maintaining the knife in inoperative position while the machine is at rest and for releasing it upon the starting of the machine.

10. In a machine of the class described, a work support, a knife and means for carrying it around the work, means tending to maintain the knife in operative position, automatically actuated means for moving the knife away from the work at a desired point in the cycle of operations and for maintaining it out of engagement with the work, and means forreleasing it to permit it to return to operative position.

1.1. In a machine of the class described, a work support, a knife, a knife carrier movable to carry the knife around the work, means tending to maintain the knife in 0perative position, a movable latch on the knife carrier, a stop in the path of said latch constructed and arranged to engage the latch and cause it to draw the knife away from the sole at a desired point in the cycle of operations.

12. In a machine of the class described, a work support, a knife, a knife carrier movable to carrv the knife around the work, a

movable latch on the knife carrier, a plate cooperating with the latch, and means constructed and arranged to engage the latch and cause it in cooperation with said plate to maintain the knife out of engagement with the workduring a predetermined portion of the cycle of operations.

13. In a machine of the class described, a work support, a knife, a knife carrier movable to carry the knife around the work, means tending to maintain the knife in operative position, a movable latch on the knife carrier, and a plurality of stops arranged in the path of the latch each acting as the latch passes it in one direction to move the latch and thereby to cause the knife to move either to operative or inoperative position. I

14. In a machine of the class described, a knife movable around the work, a knife carrier, a bell crank lever, one arm of which is connected to the knife carrier, a driving shaft rotatable in fixed bearings, and a crank thereon directly connected with the other arm of the bell crank lever for moving the knife.

15. In a machine of the class described, a driving shaft, a crank thereon, a knife movable around the work, a knife carrier, a bell crank lever, one arm of which is connected to the knife carrier and the other arm of which is connected to the crank and serves as a counterweight tending to return the knife to a predetermined initial position.

16. In a machine of the class described, a work supportfor sustaining a last with a sole thereon, means for operating upon the sole, a clamping device movable toward and from the work support to clamp and release the work, a movable forkedmember arranged to engage the work, actuating devices for said member tending to expel the work from the machine, and means acting automatically at a predetermined point in the cycle of operations to move the clamping device away from the Work support, allowing said forked member to eXpel the work from the machine.

17. In a machine of the class described, a work support, a work clamping device, a knife, means for carrying the knife around the work and for returning it in a reverse direction over substantially the same path to its starting point, and means acting auto matically to release the clamping device as the knife reaches the starting point.

18. In a machine of the class described, a work support, a work clamping device, a knife, a shaft, a clutch for connecting the shaft to a source of power, connections between the knife and the shaft for carrying the knife around the work and for returning it to its starting point, a cam upon the shaft and connections between the cam and the clamping device constructed and aranged to eii'ect automatically the clamping of the work when the shaft is rendered opcrative.

19. In a machine of the class described, means for operating upon the work, a Work support, a work clamping device, means operated automatically by the insertion of the work into the machine for actuating the clamping device and for starting the machine.

20. In a machine of the class described, means for operating upon the work, a work support, a movable work rest, automatic means for clamping and unclamping the work, starting and stopping mechanism controlled by the work rest, means connected with the work rest and acting when the work is nnclamped to expel it from the machine and to cause the machine to stop.

21. In a machine of the class described, a work support, a trimming knife, a knife carrier rotatable about an axis to carry the knife around the work and also movable to carry the knife to and from the work, drivin mechanism for said carrier including a clutch, a Work rest controlling the clutch, and automatic means for moving the knife to and from operative position at predetermined points in the travel of the knife.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

LEWIS J. BAZZONI.

Witnesses:

. FREDERICK L. EDMANDS,

HARRY C. KEITH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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