DE209630C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- M 209630 CLASS 71 c. GROUP

Patented in the German Empire on September 21, 1906.

This invention relates to sole cutting machines of the type in which the clamped sole is cut according to a pattern by means of a knife guided around the latter will. There have been two types of such machines up to now; first of all those with which the The workpiece and the pattern are rotated and the knife comes to a standstill, and secondly, when which _the sole and the pattern remain

ίο and the cutting knife moved around the same will. Machines of the latter type have certain advantages because the knife can be given a fast and slow movement towards the sole, so that the Knife moved along the sides of the sole at a relatively higher speed can be where the cut is relatively easy, while when rounding the sole and of the heel where the work is more difficult, the knife at a relatively slower speed can be moved forward. However, machines of this type have certain disadvantages because of the wide arc required for the rotating cutting knife is required, as well as because of the holding and regulating device and because of the cumbersome facilities that are necessary to give the cutting knife the necessary To give movements when changing speed and setting, etc. and the same in a path approximately corresponding to the contour of the sole around the workpiece respectively. This also largely applies to the sole cutting machines, where the workpiece and the pattern are rotated and the knife stands still.

The present invention is primarily aimed at 45

to eliminate these disadvantages of the two 'types of machines' mentioned by both the workpiece as well as the knife is moved in such a way that the knife carrier is relatively to the workpiece carrier describes an elliptical path that approximates that to be cut Outline of the sole corresponds, and that at the same time the cutting knife is transverse to the elliptical Railway vibrates under the influence of a pattern. This will have all the advantages of the older design obtained, among other things, the movement of the knife around the workpiece in one of the sole outline approximately corresponding path, without the involvement of the pattern, as well as the faster trimming of the sole to the relatively straight stretching of the sole edge and the slower trimming at the curved parts of the same, and this is done by means of a much simpler and more functional design than here before.

In the drawings there is an exemplary embodiment of the sole cutting machine shown. It shows:

Fig. Ι a vertical longitudinal section of the machine,

Fig. 2 is a front view of the same with a section through the support column,

Fig. 3 is a plan view of the same in partial section.

FIG. 4 shows a view similar to FIG. 3, but with the parts in a different working position are located, '

FIG. 5 shows an individual part in section along line 5-5 of FIG. 3,

6 shows an individual part in section along line 6-6 of FIG. 4,

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60

7 shows an individual part in vertical section, which shows the relative position of the workpiece carrier, the pressure plate and the knife.

Fig. 8 is a detail showing the brake used to stop the machine serves at a predetermined point.

9 illustrates the position of the workpiece in relation to the stationary knife.

Fig. 9a shows the way in which the individual Pieces of the sole can be cut from a leather strip. '

Fig. 10 shows the device for holding and adjusting the cutting knife.

Fig. Ioa illustrates the knife used. 11 shows a perspective view of FIG Placement of the sliding blocks in the rotatable head of the sole cutting machine.

Figs. 12, 13, 14 and 15 are schematic representations on a reduced scale, the operation of the grooved head and the machine's slide blocks driving the knife.

Fig. 16 is a schematic illustration on an enlarged scale and illustrates how by the movement of the knife in an elliptical path while the workpiece is on the same rotated past, cutting accelerated along the relatively straight stretches of the sole edge and is decelerated at the curved lines thereof.

The frame A (Figs. 1 and 2) can be of any desired shape and arrangement. * ■ It is provided with bearings for a horizontal drive shaft α , which is provided at its rear end with the part a ^{1 of} a friction clutch attached to it. This coupling member is attached to the long hub a ^{2 of} a brake wheel a ³ , and the band brake a ^{l is} placed around this (see also FIG. 8). The latter is secured against rotation by a bolt j screwed into the machine frame. The band is provided with outwardly widening ends a ⁵ which are pressed against one another by means of springs ⁶ seated on a rod α ^{7 in} order to cause the band to grip the brake wheel.

On the long hub a ^% is the moving one

Coupling link α ⁸ loosely mounted and as a belt

' ^Λ disc formed, which is usually pushed away from the fixed coupling part by a spring α ^9.

The hub of the movable coupling part is provided with an annular groove into which the forked end of an angle lever α ¹⁰ engages (FIG. 1). The same is swingable on the frame, and at its other end, which is also forked, a ring a ^{12 is} articulated, which ^is connected to a head a is which is slidably mounted on the lower end of a rod a ^{1Sx. An arm α 14} is adjustably attached to this rod, which is bent inwards at its lower end and with a fork engages around the neck a ^is at the lower end of the head a ¹³ . A spring a ¹⁶ is connected between the head a ¹³ and the part to which the spring is connected. This spring acts in such a way that it presses the head a ^ls tightly against the inwardly bent end of the arm α ¹⁴ , so that this head can only be lifted with respect to the rod by compressing the spring. At the lower end of the head a ¹³ (Fig. 1), the pedal rod α ¹ 'is screwed, which is connected with its lower end to the shorter arm of the pedal lever a ^ls . This is arranged on the pedal shaft a ^{19 so that it can oscillate.}

The depression of the pedal lever causes the spring a ¹⁶ firstly to lift the head a ¹³ and secondly to lift the rod a ^13x , so that the workpiece is held by the means to be described. If the workpiece is clamped and a further upward movement of the rod a ^{1Sx is} impossible, a further upward movement of the pedal rod a ¹⁷ causes the head β ¹³ to compress the spring α ¹⁶ and perform a sliding movement along the now fixed rod a ^13x. This has the effect that the angle lever α ¹⁰ brings the two coupling members into engagement, whereby the machine is set in motion. At the beginning of this movement of the angle lever a ¹⁰ , the horizontal arm occurs between the widened brake ends a ^s (FIG. 8) and separates the latter, so that the brake is released just before the coupling members engage. When the pedal is released to stop the machine and pulled up by the spring a ²⁰ (Fig. 1), the first movement is to release the coupling members and then immediately apply the brake. These effects occur under the influence of the spring α ¹⁶ . After this return movement of the treadmill, the push rod a ^{13x can go} down and thus release the workpiece.

At the front of the frame is the head B (Fig. 1 and 2), which is conveniently arranged so that it can be removed from the main frame. The surface of the head B is smooth and flat in order to form a counterpressure surface for the horizontally movable knife carrier δ, which is shown in particular in FIG. 6. This knife carrier (Fig. 3 and 4) is provided with a long slot δ ¹ in which two block carriers δ ² , b ³ (Fig. 6) are slidably arranged. In the right end (FIG. 6) of this slot, a block δ ^{4 can be} displaced; the same is rotatable on a pin ⁶ fixed in the cutting head B. The two block carriers δ ² , -δ ³ are provided with internal threads, which are marked with '. two different threads provided adjustment

screw δ ⁶ takes up (Fig. 6). The latter is mounted at its left end in a bearing δ ⁷ , which is connected to the support plate δ. The bearing δ ^{7 also} forms a cap to close the end of the slot δ ¹ and prevent longitudinal movement of the spindle δ ^β , while free rotation of the latter is made possible by means of the square at its end. One thread part, which is preferably equipped as a right-hand thread, engages in the block δ ² and has a steep thread, for example six threads on 25 mm, while the other thread part, which also has a right-hand thread, ^{engages in a block δ 3} and expediently one has a flat thread, e.g. B. 24 threads on 25 mm, so that the rotation of the screw causes the two block carriers, which are to be moved against each other, receive a peculiar adjustment movement, which will be described below. The block supports δ ² and b ³ each have a pin δ ⁸ and δ ⁹ , on which the sliding blocks δ ¹⁰ and δ ^{11 are} loosely arranged. These slide in the right-angled intersecting slots c ¹ , c ^{2 of} a head c (drawn in reverse in Fig. 11). This head c rests on the knife carrier δ and is displaceable on this.

The head c is (FIG. 11) provided with a ^{ring gear c 3} which is somewhat conical and is driven by a correspondingly conical drive c ^{4 of} the shaft c ⁵ mounted in the frame A. This shaft c ^B is driven by the horizontal drive shaft α , by means of the conical gears c ⁶ , c ⁷ .

To cover the ring gear c ³ (Fig. 1) a cover c ^{8 is} provided, which is designed in its central part such that it forms a bearing for the upwardly projecting hub c ^{9 of} the drive wheel c. The cover or the housing c ⁸ is attached to the fixed head B by screws s (Fig. 2) and forms a fixed bearing for the head c by means of the circular opening and the hub, so that the head c can only rotate.

The housing c ⁸ holds the head c down while the blocks δ ¹⁰ and b ¹¹ carry it. Both the head c and the carrier δ are thereby movably supported between the housing c ⁸ and the fixed head. A plate c ¹¹ is removably attached to the hub c ^{9 of} the head c. The workpiece carrier is slotted to receive the headed adjusting pins c ¹² , which are surrounded by sleeves c ¹³ , the. carry the workpiece ^{holder c 14} (Fig. 10 and ioa). On this the pattern c ¹⁵ made of metal, wood or other material is attached. The longitudinal axis of the workpiece carrier is ^{brought into a straight line with the slot c 1 of} the rotatable head c (FIGS. 12 and 14). The pins c ¹² can be adjusted in the slot to accommodate pattern carriers of different lengths.

An extension of the knife carrier δ (Fig. 3 and 7) protrudes over the circumference of the housing c ⁸ and has a rotatable gear segment d ¹ at d , which engages with a gear d ^{2 of} the shaft ίί ³ (Fig. 4 and 5) stands. The inner end of a spring d ^{i is} connected to this shaft, the outer end of which is attached to the inner wall of a spring housing d ^& which is rigidly connected to the knife carrier δ. The knife carrier arm d ^{e is} connected to the gearwheel segment d ¹ and at its end carries the obliquely arranged knife holder d ¹ , on which the knife d ^{B can be} adjusted. The handle of the knife d ^s is provided with grooves k which engage in corresponding grooves k ¹ (FIGS. 10 and 10) of the holder / against which the knife is clamped by means of bolts f ¹ . This device allows the knife to be set on its holder and to hold it firmly in this position.

The action of the spring d ⁴ in connection with the gear wheel d ² is to rotate the gear wheel segment d ¹ in the direction of the arrow (FIGS. 3 and 4), which causes the knife holder d ¹ at the free end of the arm d ⁶ resiliently pressed against the edges of the pattern c ¹⁵ and following the changing outline of the latter as the pattern is rotated past it to cut the sole clamped against it in the exact shape and shape of the pattern.

The tension of the spring cü ⁴ holding the knife can, after the toothed wheel has been brought into engagement with the toothed wheel segment d ¹ , by rotating the spindle d ³ by means of a key placed on the square of the same. To lock the gear against rotation and to keep the knife arm and its knife in a fixed position at all times, for example to allow a change of pattern, a spring-influenced lever d ⁹ attached to the spring housing is provided, which is connected to the teeth of the Gear d ² can be brought into engagement. The tendency of this gear to rotate acts in such a way that the tooth of the lever d ⁹ comes into closer engagement with the teeth of the wheel and counteracts the spring d ⁱ , which tries to bring the lever d ⁹ into the disengaged position.

When the head c is rotated, the knife carrier head δ is prevented from rotating with the pin δ ⁵ , which is fixed to the fixed head B and whose block δ ⁴ engages in the slot δ ^{1 of} the knife carrier head. This rotation of the head c has the effect that the blocks b ¹⁰ , δ ¹¹ in the intersecting at right angles. Slitting the head c back and forth

slide, whereby the knife carrier b is caused to vibrate around the pin b ⁶ and, guided by this, slides inwards and outwards. As a result of this movement of the knife carrier, the knife is moved in an elliptical path, specifically as follows, with reference to the schematic representations of FIGS. 12 to 15:

FIG. 12 shows the parts in the rest position, the knife d ^{8 being} in position 1. If the head c now rotates in the direction of the arrow from the position in FIG. 12 to the position in FIG. 13, the blocks δ ¹⁰ , δ ¹¹ slide in the direction of the arrows (FIG. 12) in the slots c ² and c ¹ . until they have assumed the position illustrated in FIG. As a result, the knife carrier δ with the knife d ^s is swung outwards around the pin δ ⁵ and pushed until the knife d ⁸ has assumed position 2 in FIGS. If the head c now rotates from the position in FIG. 13 to the position in FIG. 14, the blocks δ ¹⁰ and δ ¹¹ are thereby moved from the position in FIG. 13 in the direction of the arrows (FIG. 13) to the Slits c ² and c ^{1 are} displaced to the position in FIG. 14, as a result of which the knife carrier with its knife is ^{swung inwards around the pin 6} until the knife has reached position 3. With further rotation of the head c to the position FIG. 15, the blocks δ ¹⁰ and δ ¹¹ slide in the slots c ² and c ¹ in the direction of the arrows (FIG. 14) until they assume the positions shown in FIG have, the knife carrier b is swung with its knife outwards around the pin δ ⁵ and shifted so that the knife assumes the position 4. When the head c is rotated further by 45 °, the blocks δ ¹⁰ and δ ¹¹ and thus the knife return to their starting position in FIG. The head c has now rotated 180 °, and the knife d ⁸ has now described a closed curve, and the curve determined by points 1, 2, 3 and 4 is drawn as was done in FIG. 12 one finds that the knife has described an ellipse Z. 16 shows how the rotation of the head c and the simultaneous movement of the knife in its elliptical path, whereby the knife is guided around this for the purpose of trimming the sole, accelerates the trimming on the relatively straight stretches of the sole edge and on the curved parts thereof is decelerated.

The starting position of the pattern with the workpiece clamped on it is denoted by I and that of the knife is denoted by y. The machine is now started. While the pattern rotates with the workpiece from I to II in the circle C around the point C ¹ , moves. the knife moves in its elliptical path Z from y to y ¹ . If you divide this movement of the knife in the curve yy ¹ into its two components yz and yz ¹ , you can see that the component yz, which is more or less directed in the opposite direction to the movement of the workpiece, is greater than the component yz ¹ which is more or less oriented in the direction of movement of the workpiece. When trimming the relatively straight section yy ^{1 of} the sole edge, the trimming is thus accelerated. As the workpiece continues to rotate from II to III, the knife moves in its elliptical path from y ¹ to y ^% . If one divides this movement into its components y ¹ -) / ² and yz ³ , one sees that the former, which is directed against the direction of movement of the workpiece, is smaller than the latter y ¹ -z ³ , which is more or less in the same Direction how the movement of the workpiece is directed. When trimming the curved section y ^x -y ^{2 of} the sole edge, ie around the first half of the heel curvature, the trimming is thus delayed. The workpiece now rotates from III to IV and the knife moves in its elliptical path from y ² to y ³ . Of the components y ² -z * and y * -z ⁵ , the latter directed in the direction of the workpiece is greater than the former y ² -z ⁱ , which is directed more or less counter to the direction of movement of the workpiece. When trimming the curved path y ² -y ^{s of} the sole edge, ie the second half of the heel curvature, the trimming is therefore also delayed. If the work piece is rotated further from IV to V, the knife moves in its elliptical path from y ³ to y ⁴ . The component y ^a -z ^{6 of} this movement directed more or less in the opposite direction to the movement of the workpiece is greater than the component γ ³ -ζ ^Ί directed in the direction of movement of the workpiece, so that when the more or less straight section y ³ - is trimmed y ^{4 of} the sole edge trimming is accelerated again. The workpiece now rotates from V to VI, while the knife moves in its path from y ⁱ to y, its starting point, and if this movement were also broken down into its components, one would find that the movement is also accelerated here will. The trimming of half of the sole, i.e. the half of the heel, has now been done, and as the workpiece now completes the remaining 180 ° of its entire turn and the knife traverses its elliptical path again, the other half of the sole or the front part is trimmed the sole in front of you, with the trimming of the relatively straight stretches of the sole edge accelerating the trimming, while the trimming is delayed when trimming around the toe. Remember the knife on his

Arm d ^{e is} mortised so that it is always tangential to the edge of the pattern and its cutting edge is always directed in the direction of the cutting progress.

. If the knife were not resiliently arranged on its carrier, the path which the knife traverses when trimming the sole would correspond approximately to the path ν drawn in dotted lines around the sole in FIGS. 3 and 4. It can be seen that this path υ at both ends largely coincides with the outline of the two ends of the pattern, but that this is not the case on both sides of the pattern where the pattern is tapered to form the joint part. This path v, which the knife describes without the aid of the pattern, is an elliptical one, and one can say that it largely corresponds to the shape of a sole. However, since the diameter is always held during the trimming by the spring ä ^ with the pattern edge in contact, so the same thing exactly follows all the Musterumriß. The path v, which the knife describes without the aid of the 'pattern around the sole, deviates so little from the outline of the pattern, as can be seen from FIGS. 3 and 4, that only a relatively small spring action is required around the knife to force to follow the pattern circumference exactly, which is very desirable, since in this way the trimming of the sole everywhere, but especially on the curved parts without too much friction between the pattern edge and knife and on the convexly curved parts especially without too much inclination Sides of the knife moving tangentially away from the pattern edge is going extremely smoothly. The slow trimming of the sole on the curved parts of its outline also contributes to this.

By adjusting the blocks δ ¹⁰ , δ ¹¹ closer to one another, the width of the ellipse that the knife describes can be made narrower. The adjustment can be made in such a way that the knife is moved essentially in a straight line. By removing the blocks, the ellipse is made wider and closer to a circular outline for wide soles. These settings have the effect that, for example, the block δ ¹⁰ moves further in each direction than the other δ ¹¹ , which happens because of the difference in the thread pitch of the spindle δ ⁶ (Fig. 6), so that when the blocks are approached ( for a 'narrow sole), the ellipse is shortened and, if they are separated from each other (for wider soles), the ellipse is also lengthened. The proportions here are such that these changes adapt to the length and width of the usual sole size !

Immediately above the pattern c ¹⁵ (FIG. 1) is the pressure plate e, which hangs from two blocks e ¹ , which are radially adjustable in the pressure block e ² . The latter is rotatably connected at e ³ to the lower end of the vertical pressure spindle e ⁱ , which is mounted rotatably and vertically displaceably in the protruding arm of the machine frame.

The lower end of the spindle e ⁱ is rounded so that the one with the vertical spindle <? ⁴ rotating pressure blocks e ^a at the same time around which the pivot point e ^{s can} swing in order to lay firmly against the sole, which is clamped between the pressure plate and the pattern ...

On the upper end of the pressure spindle e ⁴ , the adjustable nut e ^{s is} screwed, which is provided with an annular groove in which the short fork arm of a pressure lever e ⁶ engages / the latter is rotatably arranged at e ⁷ on the frame, and its long arm is with connected to the short arm of the push rod a ^13x . It can now be seen in what way the upward movement of the push rod a ^13x after depressing the pedal lever causes the pressure spindle e ^{i to be} depressed and thereby brings the pressure plate into firm clamping contact with a sole placed ^{on the pattern c 15.}

The hub of a somewhat conical gear wheel e ^{9 is} attached to the pressure spindle e ^{i and} is driven by a correspondingly conical gear wheel e ⁹ which is attached to the upper end of the upwardly inclined shaft c ⁵ .

The rotation of the main shaft α thus not only causes a rotation of the head c to cause the movements of the knife carrier and the rotation of the work table and the pattern, but also rotates the printing plate in accordance with the pattern so that the workpiece with the overlying pressure plate and the pattern under it rotates as a whole in accordance with the conical gear c ³ on the head c and so the sole edge of the knife d ⁶ and supplies. causes the latter to cut and round the sole according to the shape of the pattern.

With the present machine, the worker can stand close to the sole to be processed without a large work table in front of him. There is no intricate device that swings back and forth in a circle in front of him, as is the case with the knife-carrying and regulating devices of Julian's machine. On the contrary, in the case of the present machine the knife holder remains on one side in the rear part of the frame head B, so that the worker does not have a vibrating part directly in front of him that could grasp and destroy his clothes.

While also in the well-known machine from Julian the cutting effect around the fixed sole progresses and makes it difficult for the worker to cut with the

To follow the eye and discover mistakes in the cut, before the sole is completely rounded and removed, takes place on this machine the cut takes place essentially in the same place as the worker can direct his attention. The work piece passes this point during the cut.

When the foot pedal is depressed to start the machine (Fig. 2), it is held in the lowered position by a locking lever g which hangs from a bolt g ^{1 of} the frame and whose upwardly extending arm g ^{2 is connected} by means of a link g ³ to the descending arm of a lever g ⁴ which swings at g ⁵ on the frame. The upper end of this lever g ⁴ has a slotted sleeve in which the shaft of a bolt g ⁷ provided with an eye is held in place by means of a clamping screw g ⁶ (FIGS. 2 and 3).

This eye-provided bolt holds by means of a clamping action the threaded rod g ⁸ which has at its end a roller g ⁹ which at the appropriate time ^{comes into engagement with a thumb g 10} (FIGS. 3 and 4).

The spring g ¹¹ (FIG. 2) acting on the arm g ² tries to swing the locking lever g to the right. As a result, the pedal lever a ^{18 is} locked as soon as it is depressed.

When the sole is completely cut and rounded when the pattern and the pressure plate are rotated, the thumb g ¹⁰ (FIGS. 3 and 4) reaches the roller g ⁹ and pushes it outwards, causing the locking lever to be thrown to the left and the pedal lever free so that the latter can assume its upper position, the workpiece is free and the machine stops. During the processing of the sole, however, the coupling device is held in.Arbeitsstellung, and, more importantly, the work piece is held clamped quite independently of the worker, so that no inattentiveness of the worker can result in letting go of the workpiece; rather, the workpiece remains automatically clamped until the processing of the sole is completed. The present invention is therefore completely automatic.

To be able to move the machine by hand, e.g. B. when setting or trying, ie not to let it act automatically, ^{a lever g 12 is hinged to the lever g 4} (Fig. 2), which, when the lever g ⁴ is thrown with the upper end to the left, as a spreader can be pivoted between the lever g ⁴ and the head B , so that the locking of the pedal lever is prevented.

In FIG. 9, the typical picture of a not yet processed piece of sole is shown in full lines shows how such are obtained in quantities by the shoe factories. This raw The sole shape is to be trimmed and rounded off by the machine at hand.

Such unprocessed sole pieces show approximately at the point χ (Fig. 9) a uniformly sloping edge, ie the two sides of the front 'their part' are essentially equally inclined to the central longitudinal axis of the sole, so that even with right and left soles the The inclination of the edge at the point χ is essentially the same, although of course the length of the edge is different depending on whether the sole is right or left.

Through comparative tests it has been found that the desired shape of the sole at the point χ usually coincides substantially with the edge of the finished sole for a greater or lesser distance, so that when the sole is trimmed at this point, little or no cutting effect needs to occur.

When cutting, it is therefore advisable to start at point χ , ie the machine comes to rest at χ. When stretching the sole onto the pattern, the worker must press the part χ of the sole to be trimmed ■ against the edges of the knife and then clamp the sole.

If the machine is started with the go knife in this position, the sole opens a relatively considerable distance of 12 to 38 mm past the knife without a cut takes place.

This enables you to avoid a backward movement of the knife, which is required on Julian's machine so that the cuts at the beginning and end of the cutting movement coincide. In the machine of the present invention, it is only necessary ^{to adjust the pattern drive and the thumb g 10} once and for all so that the holding position of the knife lies within the above-mentioned cut-free distance of 12 to 38 mm.

In studying the movements in FIGS. 12-15, it must be borne in mind that they_only are shown schematically in order to make the working principle understandable that they therefore not give an absolute, exact representation of the parts in the different layers, nor with specify the movements of the parts with absolute accuracy.

Claims (8)

Patent-to sayings: i. Sole cutting machine with a workpiece carrier and a cutting knife, characterized in that, for cutting the sole, both the workpiece carrier (c ^Xi ) iao and the knife carrier (b) are moved automatically in that the former rotates and the latter describes an approximately elliptical path in such a way that the path of movement (υ, Fig. 3) of the knife resulting from these two movements is an elliptical one which approximately corresponds to the contour of the sole to be cut. 2. Sole cutting machine according to claim 1, characterized in that the knife carrier (b) and the workpiece ^{carrier ^ c 14} J are stored one above the other and one (c ^xi ) directly and the other (b) through the latter (b ¹⁰ , b ¹¹ ) is driven. 3. sole cutting machine according to claim i, characterized in that by the movement of the knife carrier in an elliptical path while the workpiece rotated past the same, the knife temporarily more essentially in the direction of movement of the workpiece, as this direction of movement moves in the opposite direction and vice versa, so that the. speed the cutting movement of the knife changes. 4. sole cutting machine according to claim 3, characterized in that the mutual position of the path of movement of the workpiece carrier and that of the knife carrier is chosen so that the knife is when cutting the substantially straight Stretching the edge of the sole, such as B. the sides of the sole, more against the direction of movement of the workpiece, and when cutting the curved stretches of the sole edge, such. B. the paragraph and the Tip, moved more with the workpiece, so that the cutting of the substantially straight Stretching the sole faster and cutting the curved parts slower going on. 5. sole cutting machine according to claim 3, characterized in that the Mechanism for rotating the workpiece carrier and that by which the knife carrier moves in its elliptical path are set so with relation to each other that when the knife is moves in the same direction as the workpiece, never its speed of movement that of the workpiece, so that the cutting action of the knife never interrupts will. 6. Sole cutting machine according to claim 2, characterized in that -the knife carrier (b) with a slot (b ¹ ) comprises a pin (b ⁵ ) fixed to the machine frame (A, B) and by two sliding blocks (b ¹⁰ , b ¹¹ ), which slide in grooves (c ² , c ¹ ) of a rotating head (c) , is moved. 7. sole cutting machine according to claim 6, characterized in that by . mutual adjustment (b ^6, b ^2, b ³⁾ of the sliding blocks (b ^10, b ^11), the longitudinal and transverse axis _R of the elliptic orbit can be varied to this curve as needed approximately conform to the outline of all shoe sizes. 8. sole cutting machine according to claim i, characterized in that the workpiece when starting (α ¹⁸ , α ¹⁷ , α ¹⁰ , α ⁸ , α ¹ ) of the machine between a pressure plate (e) and the workpiece carrier (c ¹ * ¹ ) or the pattern to be placed on the latter (c ¹⁵ ) is clamped (a ¹⁶ , a ^13x , e ⁶ , e ⁵ , e, e ^A ) so that the parts mentioned are set in rotation together (c ⁵ , c ⁴ , c , e ⁹ , e ⁸ ), and that the pressure plate (e) is removed from the workpiece by an automatically acting device (g ¹⁰ , g ⁹ , g ¹ , a ¹⁰ ) and releases the latter as soon as the knife and the workpiece have a predetermined one ., take up mutual position (x) again. For this purpose 2 sheets of drawings.