US2242415A - Stock fitting machine - Google Patents

Description

May 20, 1941'. w. N.. BRAY El AL 2,242,415

STOCK FITTIN MACHINE Filed Nov. 21, 1939 2 Sheets-Sheet 1 Figfl. H

May 20, 1941. w. N. BRAY ETAL 2,242,415

STOCK FITTING MACHINE Filed Nov. 21, 193 2 Sheets-Sheet 2 Fi s.

Patented May 20, 1941 STOCK FITTIN G MACHINE William Neil Bray and Charles Martin Bagshaw, Leicester, England, assignors to United Shoe Machinery Corporation, Borough of Flemington, N. .l'., a corporation of New Jersey Application November 21, 1939, Seria1'N0..305,530 In Great Britain December 8, 1938 Claims.

This invention relates to sole fitting machines and is herein illustrated as embodied in a channeling machine.

After channels have been cut in insoles, for example, the channel lips are raised to facilitate the subsequent sewing operation by which uppers are attached to the insoles. To eliminate the tendency of the raised channel lips to return to their original position, it is customary to make transverse slashes either in the inner channel lip or in both the inner and outer lips. Heretofore, it has been customary to make the slashes in the channel lip during each operating cycle of the machine.

It is an object of this invention to provide a lip slashing device which is so arranged that a variable number of operating cycles may take place between successive operations of the slashing knife. By such an arrangement a sufiicient number of slashes may be made in the channel lips to reduce appreciably the tendency of the lips to return to their original position, while at the same time the slashes can be spaced far enough apart to prevent their presence from unduly reducing the strength of the lips. In the illustrated machine wherein the channeling knives are reciprocated back and forth during each operating cycle, the lip slashing device consists of a slashing knife which is coupled to the actuating mechanism of the machine by a control mechanism that includes a counting device which can be set to cause the lip slashing knife to be given a downward movement only after a predetermined number of operating cycles.

Since the insole must be more carefully guided While the channeling operation is proceeding around the toe end than while the operation is proceeding around the other parts of the insole, the operator usually reduces the length of the stroke of the channeling knives while channeling around the toe end. This would normally cause the transverse slashes made by'the slashing knife to lie appreciably closer together at the toe than in the other parts of the insole which is considered to be undesirable because it unnecessarily weakens the insole lip in that area.

In accordance with another feature of this invention, means are included in the control mechanism for the lip slashing knife which acts automatically when the length of the stroke of the channeling knives is reduced to delay the successive slashing actions of the slashing knife until a greater number of operating cycles have occurred than takes place during the channeling of other parts of the insole where longer knife strokes are used. As illustrated, this means consists of a supplemental control for the counting device which modifies the setting of that device when the channel knife stroke is shortened.

The term operating cycle of the machine, as used herein, refers to one of a series of operations which are repeated during the channeling of a workpiece such as a sole. For example, in a machine .employing oscillating knives such as the one illustrated herein, an operating cycle would be the movement of a channeling knife from the time it starts on a cutting stroke until it is ready to starton the next cutting stroke. In a machine where the channeling knivesare stationary and the work is forced past the knives by feeding means, such as an oscillating feed foot, one complete movement of such means would be an operating cycle.

These and other features of the invention in. cluding centain details of construction and combination of parts, will be shown as embodied in the illustrated machine and will be pointed out in the appended claims.

Referring to the accompanying drawings,

Fig. 1 is a front elevation of the head of a channeling machine embodying this invention;

Fig. 2 is a transverse section in elevation taken through the machine shown in Fig. 1 at a point to the rear of the view shown in that figure, Fig. 2, illustrating the control mechanism for the slashing knife;

Fig. 3 is a side elevation taken from the left of the machine as viewed in Fig. 1 showing a portion of the knife carrying mechanism of the illustrated machine;

7 Fig. 4 is an elevational view showing details of the mounting of one of the slashing knives;

Fig. 5 is a plan view, partly in section, of .various work engaging devices of the illustrated machine showing their relation to the edge of an insole which is indicated by dot and dash lines, and

Fig. 6 is a frontelevation of the control mechanism for the slashing knives shown in Fig. 1, with the overlying structure broken away.

The illustrated channeling machine, except as will hereinafter appear, is similar to the machine disclosed in the United States Letters Patent No. 1,023,801, granted April 23, 1912, upon application of F. E. Bertrand. The illustrated machine includes two slashingknives l I and I3,the slashing knife I I being positioned (Fig. 1) between a gage I2 in the above mentioned patent. The slashing knife I3 which slashes the edge channel lip lies to the right and rearwardly of the slashing knife I I, as viewed in Figs. 1 and 5, and to the right of a channeling knife I9 and its associated presser gage 2|. The cutting edges of the knives I I and I3 extend forwardly and rearwardly of the machine as viewed in Fig. 1 and may be horizontal, i. e., parallel to the upper edge of the insole or may be sloped so as to parallel the cuts made by their associated channeling knives, re.- spectively, so that the bottoms of the slashes will be substantially parallel to the bottoms of the channels made by the channeling knives. The

rear end of the cutting edge of the slashing knife II is spaced from the front end of the slashing knife I3 (Fig. 5), the space between these ends of the knives being such that the knives do not cut into the part of the insole, known as; the be-' tween substance, which lies between the bottoms of the channels.

The slashing knives are operated to cut into the insole, just as the channeling knives and their associated presser gages reach the end of their work feeding movement. The slashing knife II is arranged to move to and fro ,with the channeling knives and makes its out immediately ahead, in the direction of feed, of the rearmost position of the channel knife I5. However, the slashing knife I3 does not partake of this to and fro movement and is, therefore, spaced a sufficient distance to the right of the presser gage 2I (Fig. 5) so that the latter gage may move to the right with the channeling knives a distance equal to the length of the lon est stroke of the channelin knives without coming in contact with the slashing knife I3. With this arrangement, the channeling knife I5 cuts through the slash formed by the slashing knife II very soon after the channeling knives begin to move toward the right on their cutting stroke. Due to the location of the slashing knife I3, the channeling knife I9 does not cut through the slash made by the knife I3 until the second cutting movement of the channeling knife I9 after the slashing knife I3 has cut into the insole. By positioning the slashing knife I3 to the rear of the point of, operation, asdescribed above, it will cut slashes in the outer lip when a wide margin is being formed, as when the channeling operation is progressing in the shank portion of an insole, but the knife will not make slashes when narrower margins are being formed, as around the toe.

The arrangement whereby the slashing knives are operated at the end of the work feeding movement so that the channeling knife I5 cuts across the slash formed by the slashing knife II very soon after the channeling knife commences its cutting movement, causes the inner channel lip of a sharply pointed insole to be satisfactorily slashed at one or more points around the toe end of the lip. The benefits of this arrangement might better be understood by considering the action of the knives if the slashing knife II were located farther away from the channeling knife I5. Under these circumstances, the slash cut by the slashing knife II would be made farther away from the starting point of the channel cutting stroke andthe channel knife I5 would pass across the slash near the end of its normal cutting movement. When the channeling operation reaches the toe and the length of the stroke of the channeling knife is reduced, the slash might be formed so far ahead of the starting point of the channel cutting stroke that, owing to the quick turning of the insole as the channeling operation proceeds around the toe end, the channeling knife might miss the slash entirely.

The slashing knife I3 is secured by a clamp screw 25 to the lower end of a rod 21 (Figs. 1 and 6) which is slidably mounted in bearings 29, 29 on the head of the machine. The rod 21 has secured to it by a screw 3|, a block 33. If the screw 3| is slackened the rod 21 may be turned in its bearings so that the cutting edge of the knife I3 lies at any desired angle to the direction of the feed. The block 33 has adjustably secured to it by a screw 35, a bracket 31 which is connected to the slashing knife II. The screw 35 passes through a vertical slot 39 in the bracket 31 so that the bracket may be adjusted vertically on the block 33. The bracket 31 has formed in it a recess M which receives a roll 43 carried by the upper end of a bar 45 to the lower end of which is secured, by a screw 41, the slashing knife II. The bar 45 is slidably mounted in a channel knife carrier 49 which in turn has securedto it by a screw 5| the channel knife presser gage I1 and the channel knife I5. The channel knifecarrier 49 is secured to a bracket 53 formed on a slide 55 (Fig.3) which is mounted in a swinging carrier 51 (Fig. 1), the carrier 51 being supported by pins 59 mounted on the machine frame and is swung to and fro during the operation of the machine by an eccentric BI (Fig. 2) on a drive shaft 63. The channel knife carrier 49, bracket 53, and swinging carrier 51 correspond respectively to the members 68, 66 and 34 in the above mentioned patent to Bertrand.

The slashing knife II being attached to the rod 45 which is slidably mounted in the channel knife carrier 49, is carried to and fro with the channel knives and the presser gages. However, the slashing knife I3 does not partake of this to and fro movement as it is carried by the rod 2! which is journaled in bearings 29 that are attached to the machine frame. This relative movement between the slashing knives I I and I3 is permitted by the recess M in the bracket 31 which allows the rod 45 and the knife I I to move relatively to the rod 21 and the knife I3 in a direction laterally of the machine but at the same time causes the slashing knives II and I3 to be moved up and down together by a mechanism which will now be described.

The block 33 (Figs. 1 and 6) has formed in it a horizontal recess in which is slidably mounted a block 61 carried by an arm 69 which is secured to a shaft II. The arm 69 is normally held up by a spring I3 against a stop face I4 (Fig. 3) formed. ona vertically adjustable bracket I5 (Fig. 1) secured by a screw 11 which passes through a vertical slot in the bracket I5 to the aforesaid slide 55. When the screw 11 has been slackened the bracket I5 may be adjusted vertically by means of a rotatable stud I9 in the bracket, the stud having an eccentric portion which enters a groove 80 in the slide. The slashing knives rise with the channeling knives and the presser gages by reason of the fact that the arm 69, which controls the vertical movement of the slashing knives, is held against a stop I4 by a spring I3. As will hereinafter appear, the slashin knives are moved downwardly auniform distance from their raised position and as is controlled by the presser gages, the knives will cut into the work thesame distance irrespective of the thickness of the work.

By adjusting the bracket I5, the raised position of the slashing knives may be adjusted upwardly or downwardly relatively to the channeling knives and presser gages and, since the downward movement of the slashing knives is uniform, the depth of the cuts made in the work by them may thus be varied. By adjusting the bracket 31 vertically, the slashing knife II may be adjusted relatively .to the slashing knife I3.

.The shaft 'II has secured to it an arm 8| (Fig. 2) having an arcuate face 83 which is concentric to the axis of the shaft. The shaft II also has rotatably mounted on it a bell crank lever 85. One arm 81 of the bell crank lever 85 carries a roller 89 and a spring 9| which tends to wedge the roller against the face 83 of the arm 8| and a relatively inclined face 93 of a recess in the arm 81 in which the roller is mounted. The arm 8'! of the bell crank lever 85 is normally held up by a spring 95 against an adjustable screw 97 secured in the machine frame. When the arm is in this position an adjustable screw 99 in the machine frame holds the roller 89 away from the faces 83, 93 so that the face 83 on the arm 8| can move past the roller with the channeling knives and the presser gages as they rise and fall in response to variations in thickness of the work. While the heightwise position of the arm BI will vary with the different thicknesses of the work, its face 83 will at all times be in a position in which it may be engaged by the roller 89.

Another arm IIlI of the bell crank lever 85 has pivoted on it at I03 (Fig. 2) a latch I05 which is arranged to be moved into the path of a block II" on a cam lever I09 which carries a cam roll III that engages in a cam groove H2 in a cam on the driving shaft 63. In Fig. 2 the latch is shown in its upper position and when the cam lever IDS) is moved to the left from the position shown in Fig. 2 (the block IB'I will engage the latch I55 and move the bell crank lever 85 about the shaft II. As soon as the movement of the bell crank lever 85 commences, the face 93 on the arm 8? will engage the roller 89 and press it against the face 83 on the arm 8Iso that the arm BI and shaft 'II will rotate with the arm 8'! and cause the arm 65 and the slashing knives to move down into engagement with the work. The latch $05 is normally held below the position shown in Fig. 2 by a spring II3, the latch being moved up into the path of movement of the block IB'I by a mechanism which will now be described.

A ratchet member II5 (Fig. 2) having ratchet teeth H1 is rotatably mounted on the shaft 'II. The ratchet teeth In are engaged by a pawl II9 pivoted on an arm IZI of the aforesaid cam lever I59, the arrangement being such that the ratchet member is moved one step during each cycle of the machine. The ratchet teeth III are also engaged by a stop pawl I23 pivoted on a stud I24 attached to the machine frame, the stop pawl normally preventing the return movement of the ratchet member H5. The ratchet member II5 has on it a face I25 which, after a predetermined number of movements of the ratchet member, comes into engagement with a pin I21 slidably mounted in the arm IBI. When the pin I21 is forced downwardly by the face I25 its lower end engages the arm I29 on the latch I05 and moves the latch up into the path of movement of the block IDI on the cam lever I09 so that the next time the cam lever is operated :it'

will rotate the bell crank lever and thereby cause the knives II and I3 to slash the work.

When the bell crank lever 85 is rotated to cause the slashing knives II and I3 to cut into the work, a screw I3I which is adjustably mounted in '2. lug I33 on the bell crank lever 85, moves the pawls H9, I23, out of engagement with the ratchet teeth III and allows the ratchet member I I5 to be returned by the aforesaid spring H3.

The .ratchet member I I5 has mounted on it an adjustable screw I35 (Fig. 2) which, when the ratchet member is returned by the spring II3, moves into engagement with a pin I3'I secured to an arm I33 which is adjustable about the shaft II. The arm I39 is pivotally connected to a link I II which is in turn pivotally connected to an arm I43 of a bell crank lever I43 that is rota-tably mounted on a shaft I45 which corresponds to the shaft I40 in the above mentioned patent to Bertrand. Another arm IA! of the bell crank lever IE4 is pivotally connected to a rod I49 that is in turn connected to the feed length change mechanism and to a treadle lever which controls that mechanism. 7

The screw I35 (Fig. 2) may be adjusted so that the distance between the pin I31 and the screw is varied with the result that the ratchet member H5 has to move a greater or less distance, according to the adjustment of the screw I31, before the face I25 on the ratchet member engages the pin #2? and the slashing knives are actuated. Thus, by adjustment of the screw I35 the number of feed movements of the work between successive slashing movements of the knives may be varied.

Since soles need more careful guiding while the channeling operation is proceeding around the toe than while it is proceeding around the other parts of the sole, the operator customarily reduces the length of the work feeding strokes of the channeling knives while operating in the toe portion of the sole. This would normally cause the slashes made by the slashing knives to lie appreciably closer together in the toe portion than in other parts of the sole. In the illustrated machine, this bunching of the slashes around the toe is avoided by the control mechanism for the pin I31 which operates in the following manner. When the operator depresses the treadle lever (not shown) which is connected to the rod I49 so as to shorten the movements of the work, the pin I3? is moved in a counterclockwise direction as viewed in Fig. 2 by the arm I43 and link I4I. The ratchet member II5 will then have to be moved a greater distance before the screw I35 contacts the pin I31 and consequently, there will have to be a greater number of ratcheting operations before the slashing knives are again depressed.

If it is desired to operate the machine without changing the number of feed movements between successive slashes, the arm I39 and link IGI may be removed and a lug may be provided on the arm IIII, the lug being arranged so that it extends into the path of the screw I35. With this construction the number of feeding movements which occur between successive slashes is regulated by adjusting the screw I35 and with this arrangement the slashes around the toe will be closer together than along the sides if the length of the feeding movements are reduced when operating around the toe.

The edge gage 23 (Fig. 5) corresponds to the edge gage 210 in the above mentioned patent to Bertrand and may be adjusted forwardly and rearwardly of the machine to vary the position of .the channels with respect to the edge of an insole. Preferably, the gage 23 and the usual beveling knife (not shown) do not move to and fro laterally of the machine with the channeling knives and gages during their feeding and return movements, as is the case in the machine disclosed in the Bertrand patent. To this end, the vertical pin referred to as 224 in the Bertrand patent is removed andthe auxiliary slide 218 is secured to the in and out slide 2I2 so that the edge gage and beveling knife can be adjusted forwardly and rearwardly but do not move laterally of the machine.

To summarize briefly the operation of my device, the slashing knives II and I3 are intermittently depressed to cut transverse slashes in the channel lips formed by the usual channeling knives. As the slashing knives II and I3 are caused to cut into the work, the pawls H9 and I23 (Fig. 2) are released from the ratchet teeth H1 and the ratchet member H5 is moved in a counterclockwise direction, as viewed Fig. 2, by the spring I I3 until the screw I35 engages the pin I31. As the machine continues to operate,

the ratchet member H5 is again rotated in a clockwise direction by the pawl H9 being moved around a tooth length during each cycle of the machine until the face I25 on the ratchet member H5 engages the pin I21. On the next cycle of the machine the pin I21 is depressed causing the latch I05 to move up into the path of movement of the block I 0'! on the cam lever I09 so that the slashing knives II, l3 are again being depressed when the cam lever I09 is next operated. When the length of the feed strokes are shortened as, for example, when the operation progresses around the toe end of a sole, the timing of the slashes will be varied by the adjustment of the pin I31 which is shifted by the treadle that varies the length of the feeding movements.

Having thus described our invention, what we claim as new and desire to secure by Letters Pat ent of the United States is:

1. A machine for operating upon soles comprising a knife arranged to make cuts in a sole, mechanism for operating said knife periodically in timed relation to the operating cycles of the machine, and means for varying the ratio between the operating cycles of the machine and the operations of said knife.

2. A channeling machine for operating upon soles comprising a channeling knife, a slashing knife arranged to make cuts in the area operated upon by the channeling knife, and actuating mechanism for causing the slashing knife to operate periodically in timed relation to and with a frequency less than that of the operating cycles of the machine. I V

3. A channeling machine for operating upon soles comprising a channeling knife, a slashing knife arranged to make cuts in the area operated upon by the channeling knife, mechanism for operating the slashing knife in a predetermined relation to the operating cycles of the machine, and adjustable means for regulating the ratio between the operating cycles of the machine and the operations of the slashing knife.

4. A machine for operating upon soles comprising a channeling knife, 2. slashing knife arranged to make cuts in the area operated upon by the channeling knife, actuating mechanism for the slashing knife including a counting device, means for operating the counting device during each operating cycle of the machine, and further means rendered operable by the counting device after a predetermined number of said operating cycles for causing the actuating mechanism to force the slashing knife into the work.

5. A channeling machine for operating upon soles comprising a channeling knife, a drive shaft for causing the operation of the channeling knife, a slashing knife arranged to make cuts in the area operated upon by the channeling knife, operating means for said slashing knife including a member which is operated by the drive shaft duri each operating cycle of the machine, a control linkage for the slashing knife, and a counting device also operated by the driving means during each operating cycle, said counting device being arranged after a predetermined number of operations to couple said member with the control linkage whereby the slashing knife will be actuated when the member is next operated.

6. A machine for operating upon soles comprising a channeling knife, a drive shaft for. operating said, channeling knife, a slashing knife, arranged to make cuts in the area operated upon by the channeling knife, a member operated by the drive shaft during each cycle of operation of the machine, control linkage for the slashing knife including an arm which is mounted for movement into and out of the path of said member, and a ratchet mechanism controlled by the drive shaft, said ratchet mechanism being arranged to move the aforesaid arm into the path of the movable member after a predetermined number of operating cycles of the machine.

'7. A channeling machine for operating upon soles comprising a channeling knife, a slashing knife arranged to make cuts in the area operated upon by the channeling knife, and an actuating mechanism for said slashing knife including a ratchet device for regulating the ratio between the operating cycles of the machine and. the operations of the slashing knife.

8. A machine as defined in claim 5 in which adjustable means are arranged in cooperative relationship with the ratchet mechanism for chang-' ing the ratio between the operating cycles of the machine and the operations of the slashing knife.

9. A channeling machine for operating upon soles comprising a channeling knife, a slashing knife arranged to make cuts in the area operated upon by the channeling knife, actuating mechanism' for the channeling knife including a member which is oscillated during each operating cycle of the machine, control linkage for the slashing knife, said control linkage having an arm movable into the path of movement of the oscillating member, a counting device consisting of a ratchet mechanism which is operated during each operating cycle of the machine, said ratchet mechanism being arranged tomove the arm into the path of movement of the oscillating member after a predetermined number of operations whereby the slashing knife will be operated upon the next operation of the oscillating member, and 7 ing mechanism for the slashing knives including adjustable means for regulating the ratio between the operating cycles of the machine and the operations of the channeling knives.

ii. A channeling machine for operating upon soles comprising a channeling knife having a feeding movement, a slashing knife, means for communicating the feeding movement of the channeling knife to the slashing knife, and means for moving the slashing knife relatively to the channeling knife to cause the slashing knife to perform a cutting stroke.

12. A channeling machine comprising a channeling knife arranged for movement through a cycle consisting of a cutting stroke and a feeding stroke, a slashing knife arranged for movement with the channeling knife, and means for operating the slashing knife at a point closely adjacent to the starting point of the cutting stroke of the channeling knife.

13. A channeling machine for operating upon soles comprising a pair of channeling knives arranged to cut an inner channel and a marginal channel, and a pair of slashing knives associated with the channeling knives, the slashing knife associated with the inner channeling knife being located closely adjacent to that channeling knife and mounted for movement with it, and the slashing knife associated with the marginal channeling knife being located a substantial distance from that channeling knife in the direction of the feed.

14. A channeling machine for operating upon soles comprising a channeling knife, work feeding means arranged to move a sole through the machine by a succession of feeding movements, a slashing knife arranged to make cuts in the area operated upon by the channeling knife, and means associated with the work feeding means for varying the ratio between the machine cycles and the operations of the slashing knife when the length of the feed movements are varied.

15. A channeling machine for operating upon soles comprising an oscillatable channeling knife, means for varying the length of the feeding stroke of the channeling knife, a slashing knife arranged to make cuts in the area operated upon by the channeling knife, operating mechanism for the slashing knife including adjustable means for regulating the ratio between the operating cycles of the machine and the operations of the slashing knife, and control means for said adjustable means arranged to vary said ratio when the length of the feed stroke of the channeling knife is varied.

16. A channeling machine for operating upon soles comprising an oscillatable channeling knife, a slashing knife arranged to make cuts in the area operated upon by the channeling knife, actuating mechanism for the slashing knife, including a pawl and ratchet device for regulating the ratio between the operating cycles of the machine and the operations of the slashing knife, and means for varying the length of the feeding movements of the sole, said last-named means being arranged to vary the adjustment of the ratchet when the length of the said movement is varied.

1'7. A channeling machine for operating upon soles comprising a channeling knife, a slashing knife arranged to make cuts in the area operated upon by the channeling knife, actuating mechanism for the slashing knife including a ratchet device for regulating the ratio between the operating cycles of the machine and the operations of the slashing knife, means for releasing the setting of the ratchet device each time the slashing knife is operated, means for varying the length of the feeding movement of the sole, and a stop controlled by the last-named means for regulating the adjustment of the ratchet device after it has been released.

18. A channeling machine for operating upon soles comprising a channeling knife, a slashing knife arranged to make cuts in the area operated upon by the channeling knife, actuating mechanism for the slashing knife including a ratchet mechanism which is arranged to call the slashing knife into operation after a predetermined number of operating cycles of the machine, said ratchet mechanism being released when the slashing knife is operated, means for varying the length of the feeding stroke of the channeling knife, and a stop controlled by the last-named means for regulating the adjustment of the ratchet mechanism after it has been released, said stop being positioned farther away from its associated part of the ratchet when the feeding stroke of the channeling knife has been shortened thereby to increase the number of machine operations between the successive operations of the slashing knife.

19. A channeling machine for operating upon shoe soles comprising a channeling knife, a slashing knife arranged to make cuts in the area operated upon by the channeling knife, actuating mechanism for the machine including a cam, a lever associated with the cam and operated during each machine cycle, control linkage for the slashing knife including an arm which is arranged for movement into and out of the path of said lever, a pawl and ratchet counter operated by the actuating mechanism for the machine during each machine cycle, said counter being arranged to move the arm into the path of the lever after a predetermined number of operations thereby causing the operation of the slashing knife, means for releasing the pawl and ratchet counter when the slashing knife is operated, an adjustable stop for determining the new setting of the counter, and control means for determining the length of the work feeding movement of the channeling knife, said control means being arranged to vary the setting of the stop when the length of the work feed movement is varied thereby to change the ratio between the machine cycles and the operations of the slashing knife.

20. A machine for operating upon soles comprising a support for a sole, a channeling knife, means for effecting relative movement between a sole on said support and said knife to cause a channel to be cut in the sole, a slashing knife arranged to make cuts in the area operated upon by the channeling knife, an actuating mechanism for causing the slashing knife to operate periodically in timed relation to said means for effecting relative feeding movement, and means for regulating the periodicity of movement of the slashing knife relatively to said means for effecting relative feeding movement.

WILLIAM NEIL BRAY. CHARLES MARTIN BAGSHAW.

CERTIFICATE OF C ORREC TI ON Patent No. 2,2L 2J 1 May 20, 19in.

WILLIAM NEIL BRAY, ET AL.

It is hereby certified that error appears in the printed specification of the above numbered patent reqniring correction as follows: Page LL, second column, line 14.5, claim8, for'the claimreference numeral "5" read -7 and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 21mm day of June, A. D; 191 1.

Henry Van Arsdale,

(Seal) Acting Commissioner of Patents.

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