US2616106A - Machine for treating insoles - Google Patents

Description

NOV-4 4, 1952 H. PHILLIPS 2,616, 06

MACHINE FOR TREATING INSOLES es Sheets-Sheet 1 Filed April 12, 1949 Fgl.

Invenior Harry philllpa Nov. 4, 1952 H. PHILLIPS 2,616,106

MACHINE FOR TREATING INSOLES Filed April 12, 1949 6 Sheets-Sheet 2 /52 456 I as npenier Harry Phillips By hi I v Nov. 4, 1952' H. PHILLIPS MACHINE FOR TREATING INSOL ES Filed April 12, 1949 6 Sheets-Sheet 3 6 Sheets-Sheet 4 Filed April 12, 1949 r m 0H. id n m? U y. n w 9 0 i n m: a 0- iii 6 Sheets-Sheet 5 H- PHILLIPS MACHINE FOR TREATING INSOLES H. PHILLIPS MACHINE FOR TREATING INSOLES Nov. 4, 1952 6 Sheets-Sheet 6 3/3 Invenfor H arry Phillz'ps LI //A/A/ /4 Y Filed April 12, 1949 Patented Nov. 4, 1952 a FOR TREATING LES Harry Phillips, Beverly, Mass., assi'gnor to United Shoe Machinery Corporation, Flemington,-N. .L, a ccrnor tionn N w J ay Application A r l '12, 1949, Serial No. 87,003

This invention relates tomachines for treating insoles, and is herein illustrated as embodied in a machine of the type employed in the 'manu face ture' of ribbed economy insoles. v Heretofore it has been common to prepare ribbed insoles by channeling the insoles to provide a pair of lips which may be turned up and secured together to form a rib. Usually the adhesive or cement which was used to hold the lips together was applied after the channeling but before the lip setting operation in which the respective lips were turned upright and pressed firmly together to form the rib. The resultin product from this manner of preparation was eminently satisfactory but obviously it required two successive'operations, ('1) cementing and (2) setting and for some time i-thas been realized that it would be more economical if a machine could be provided which would apply the cement just before the lips were pressed together and set. One difficulty with this procedure lies in the fact that most adhesives do not set quickly enough to hold the lips together against the fight of the leather, i. e., the natural tendency for the lips to return to their original position This difficulty could be overcome if a thermoplastic cement were to 'be employed. Such cements are, however, diflicult to handle because of their tendency to harden in the applying mecha ni sm.

Accordingly, an object of {the invention is to provide an improved lip cementing and setting machine so constructed and arranged as preferably to utilize a thermoplastic cement while avoiding the above-mentioned difficulty in the handling of such cement.

.In accordancewi'th a feature of the invention, dilficultles heretofore found in handling such cements are overcome in my novel organization by extruding the cement upon the work from an applying nozzle positioned closely adjacent to the treating rolls of the machine, said nozzle being supplied by means of a mechanism for constantly circulating the cement through passages from a suitable receptacle to a point closely adjacent to the outlet of the nozzle "and then back again during the periods between the presentation ofpieces of work, combined with means for diverting the circulating cement through the nozzle outlet only when the work is being treated.

With insoles of this type, the spacebetween the upturned lips just before they are pressed together by the setting rolls is quite limited and the result i that the p y i ime i n of a suitable nozzle are small. Accordingly, if it were '10 Claims. (01. 12 1i) 6 attempted to control the outflow of the cement by a valve'pes'itioned directly in the nozzle there 7 would be a great deal of difficulty in preventing hardening of cement around the valve during interyals of disuse of themachine, as when an operator is taking away finished work and bringing up additional Work.

Another feature of the invention relates .to an arrangement for controlling the delivery of be,- ment and it is herein illustrated as embodying a valve positioned in the receptacle to control a byp'ass in a circulating system which is extended to include a chamber in the body of the nozzle. This chamber is connected by means of 'a restricted passage to the delivery end of a circulating pump and by an enlarged return passage to the by-pa'ss leading into the receptacle. As shown, the valve is spring-pressed into a position to close the by-pass and hence the return passage so that the cement is forced to flow out through the nozzle. Heaters may be employed for the system to prevent the cement from congealing.

Still another feature of the invention resides in mechanism for releasing this valve to cause it to close when the work is gripped between the operaa'tin'g rolls mounted on parallel shafts of the setting machine. {In the latter, one of these rolls is a small cone with its base at the free end. This is positioned the inner channel .of the insole d and cooperates with a .feed roll to grip the lips and press them together. These rolls act to feed the insole to extend the treatment around its periph'e ry and are helped (by a presser roll contacting with that surface .of the insole which is opposite the surfaces contacting the :ends of the teed rolls. In the illustrated arrangement the small channel roll is axially movable. When the insole bears against the end of this roll as it is gripped in the machine, it causes an axial movementof the roll operative .to release the valve and allow it-t'o shut so that the cement-will immediately flowout through the nozzle and be :ap.:- plied to the work. .A device .connected'to the ma.- chine treadla'whichholds the rolls together when it isdepr'e'ssed -is arranged to lift the valve away from its seat when the .treadle is released and thus to'stop the :iiow of cement from the nozzle.

These and other features of the invention will best be understood from a consideration .of the following description, taken in connection with the accompanying drawings, in which Fig. l is a view inside elevation of a machine which the present invention is embodied, with parts' broken away and other parts in section;

Fig. 2 a detail horizontal section :on the line 3 IIII of Fig. 1 through a heater block in the receptacle;

Fig. 3 is an end elevation with parts in section and with the presser roll and its driving mechanism removed;

Fig. 4 is a section through a nozzle supporting post taken on the line IVIV of Fig. 3;

Fig. 5 is a plan view of the parts shown in Fig. 3 but with machine covers broken away;

Fig. 6 is an enlarged elevation showing the relation of the nozzle to the feed rolls;

Fig. '7, taken on a similar scale, shows these parts viewed from above and with the nozzle broken away to show its internal passages;

Fig. 8 is a vertical section through an insole gripped between the treating rolls with the nozzle delivering cement to the space between the lips, the section being taken at a point just before the lips are pressed together by the feed rolls;

Fig. 9 is a similar section taken at the bite of the feed rolls;

Fig. 10 is a fragment of an insole with the lips stuck together to form the rib;

Figs. 11 and 12 are end and side views respectively of a lever which interconnects the axially movable channel roll and the control valve with the parts associated therewith;

Fig. 12a is a view similar to Fig. 12 but taken with the work in position in the machine thus allowing the control valve to close;

Fig. 13 is a detail view taken at the top of the cement receptacle to show the drive for a pump therein;

Fig. 14 shows the receptacle and the pump in elevation with'parts broken away;

Fig. 15 is a plan view of the top of a heater block in the receptacle, illustrating the position of the pump which is supported at the bottom thereof;

Fig. 16 is an enlarged angular view of the pump mechanism;

Fig. 17 is a detail of the terminals of a heater element which is incorporated in the heater block, it being a section taken on the line XVII- XVII of Fig. 15; and

Fig. 18 is a view of the heater block which is at right angles to the view in Fig. 14 and has an upper portion taken on the section line XVIIIXVIII of Fig. 15 to show the by-pass leading to the valve seat, while the pump is sectioned along an irregular line to show the passage of cement through it.

The cementing arrangement which forms the subject of my invention is herein illustrated as applied to a machine of the type shown in Letters Patent of the United States No. 1,726,800, granted September 3, 1929 upon an application of F. E. Bertrand and as in that machine the workengaging tools comprise a feed roll 10 (Fig. 9) which cooperates with a channel roll l2 to grip the lips L and L of an insole I. The inner lip L results from the formation of an inner channel C (Fig. 10), while the outer lip L is formed by making an outer channel C. The insole is held inwardly against the ends of these rolls by the action of a presser roll l4 (Fig. 8) which rotates upon a vertical axis and is movable in and out as will be later explained. Just before the lips reach the gripping point of the feed rolls l0 and I2 cement is applied to the inner faces of the lips by means of a nozzle 16 which occupies a fixed position with respect to those rolls during the operation of the machine. The presentation of work to the grip of the rolls, as the operator faces the side of the machine, is facilitated by means of ploughs I8 and 20 (Fig. 6) which are mounted on suitable brackets and engage in th channels of the insole just prior to the pressure point between the rolls l0 and 12.

These operating parts are carried chiefly by a. head 20 (Fig. 1) suitably secured at the upper end of a column 22 and provided with a principal driven shaft 24 to which power is supplied as by means of a motor. From this shaft connections (not shown) are provided which deliver power to the clutch shaft on which there is mounted an elongated gear 26 and a narrow gear 28.

The presser roll 14 is secured to a vertical shaft 30 (Fig. 1) which is journaled in a housing 32 and extending rearwardly from this housing is a sleeve 34 which is slidable within the head 20 and which contains a horizontal shaft 36 provided at its inner end with a gear 38 meshing with the gear 26 and adapted to slide along that gear for the short distance which is required for in-and-out movement of the presser roll. At the outer end of the shaft 36 there is a miter gear 40 meshing with another miter gear 42 splined to the vertical shaft 39 which carries the presser roll. On the, sleeve 34 just to the rear of the housing 32 there is provided a grooved collar 44 which cooperates with pins extending inwardly from the upper arms of a forked lever 46 which is treadle operated, as later described, to move the roll l4 forward when the work is to be inserted. The lever 46 (Fig. 1) is carried upon a cross pin 48 in the outer portion of the casting which forms the head 20. This pin 48 is held in the head 20 by means of a set screw 50 (Fig. 3) and its left end, as viewed in Fig. 3, is surrounded by a coil spring 52 one end of which is secured to the head 54 of the pin and the other end of which extends upwardly at 56 and is looped to engage a draw bolt 58 passing through the collar 44. This draw bolt is used to clamp the collar 44 to the sleeve 34. It will be seen from Fig. 3 that the lower end of the collar is notched to engage a stud 6|] carried by the head 20 and serving to maintain the presser roll in upright position. By loosening the draw bolt 58 it is possible to tilt the housing 32 and hence the presser roll l4 around the axis of the shaft 36. The spring 52, 56 urges the presser roll l4 inwardly against the flat surface of the insole I. It may be moved outwardly to facilitate the introduction of work, however, by tilting the forked lever 46. The lower end of this lever is connected by a link 62 (Fig. 1) to the upper end of a bell crank 64 carried by a pivot pin in a bracket 66 which is attached to the column '22. The inner end of this bell crank 64 is joined to a treadle rod 68 which extends down through the column to a treadle (not shown) it being normally held in upward position by means of a spring 10, thus allowing the spring 52 to press the roll 14 against the work.

Associated with the head 20 is a two-part housing comprising a right head housing 12 (Figs. 3 and 5) and a left head housing 14 which are bolted to the head by suitable fasteners. The right head housing i2, as in the patented ma- I chine, is provided with an inwardly extending arm 16 through which there passes a fulcrum pin 18 forming a pivot for a forked arm in which there is journaled a shaft 82 forming a support for the channel roll l2. Power to drive this roll is delivered through a small pinion 83 sprains (Fig. 5) on an inner end of'the shaft 02. The pinion 83' meshes with a gear carried; by a stud 86 in the forked arm 80 and gear 00 meshes with a pinion 88 (Fig. 1) on a countershait 90-. The latter is provided with a gear 92 meshing with the narrow gear 28 on the clutch shaft.

This forked arm 80 which carries the channel roll I2 is normally pressed downwardly by a spring 94 so that the channel roll will tightly grip the lips L and L against the feed roll I0. When, however, a piece of work is to be inserted in the machine then the forked arm is lifted against the tension or the spring 94 by means or a pin 96 (Fig. 1) slidable in the head 20- and engaging the upper end or an adjustable screw 98 man inner arm I00 integral with the" forked lever 46. Thus depression of the treadl'e will move the connecting link 62 and tilt: the: io'rked lever 46 thereby lifting its-arm 06 and the pin 96 to tilt upward the forked arm. carrying. the: channel roll I2.

In the novel construction. herein illustrated provision is made for a slight axial movement. of the shaft 82 which carries the channel" rollv I2 To this end a fork. I02 (Fig. 5) sm-roimds the shaft 82. and fits the sides or av collar [06 which isheld on that shaftv by apin. The roll-carrying arm 80 is provided with a recess Hie-which the movement of the fork I02. The latter is urged to the left in Figs. 1 and 5 by reason of the engagement therewith of the upper arm I06 of. a crooked lever II.0. pivoted. on. a. stud I:I2 passing. through a boss II3 on the. inner face: of. the left head housing I4. Attached to the lower arm of the lever arm I I0 is a spring; I. which iscon' nected to a pin II6 also mounted; on the rear head housing ,14. The. utility of. thisspring pressed lever I I0 will be better understood. after. describing a, cement-supplying mechanism.

This cement-supplying mechanism. comprises a receptacle I20 which, with a heater block. I22 contained therein, is secured to the 'under side of. a cover I24. (Fig. 3) formed-integrallywith a plate I26. This plate. is provided with enlarged. slots I28 (Fig. 5) through which pass bolts I30 threaded in an enlarged head I232 at. the top of a. stem I34 which is. received in. a. sleeve. I96 having a wing I38 which isbolted toa. bracket. I40. This bracket I40; is mounted upon the col:- umn 22- of the machine. (Fig. 1 and is also'used for mounting. a table (not. shown) to support a supply of work. i v 7 The nozzle I6 supplied from the receptacle I 20 is carried on a. structure which. is bolted. to the top of the heater block I22, aswil1.be later. den scribed, and for that. reason its, position can be adjusted by. swinging the plate I26 supporting. the receptacle aroundv the vertical axis. of the stem I34. The latter action is. secured by screws I42 (Figs. 3 and 5 )v which are threaded. in ears integral'with the sleeve. I 36. and. these screws enage. the opposite sides. of. a flange. I, extending down from the enlarged. head I32; Movement of the. plate I26'transverse1y of. this head I132". to. provide adjustment of; the position. of. the. nozzle, inanother directionis. efiected. by alscrew. I46 threaded in a downward. extension of the plate. The height of the plate and hencepfz-the nozzle may also be. adjusted: with-respect. to the bracket M0 by means of abushin'g Hi8 threaded in the sleeve I36. on the: top of the bushing rests a shoulder. in thestem I34. This. iiushi'ngv I48 is held I in v adjusted position. by, a. loeknut. I5Q..w.hieh. is. threaded. on; $11652 lower end; .02.

the" stem I38. stiffening ribs I52 are provided upon the side margins of the cover I24 an in this cover is a filling opening I54 (Fig. 3) normally closed by a removable lid I56.

As best shown in Fig. 7 the nozzlele is thread ed in a snout I60 extending laterally from an upright post I62. The snout has a small and a large passage joined respectively to two elon gated vertical passages in the post, a small supply passage I68 and a large return passage or bypass I66. Screw plugs I65, I61 threaded in the tops of. thesepassages facilitate the. cleaning of the passages when needed and serve also to ate tacha split collar I'lozto. the post. The passages inthe. snout are" both connected with an enlarged chamber: I69. opening from the nozzle pas sage III and as long. asthe return passage or bypass I68 is open back into. the receptacle I 20 there is insufficient pressure to cause the cement to be extruded through the nozzle.

In thissame post I62 there. is a. heating element I68 necessary becauseof the thermoplastic character ofthe cement which is employed and which keeps the nozzle and the post atv an ele'. vated temperature so that there. is no tendency for th'ezcement. to harden until it leaves thenozzle and. is applied to the relatively cool work. The heating element is suspended in the post,- I'62 by means of. the split collar I10 at. the top of the post which grips an armored cable. I12 (Fig. 3) connected to the heatingelement; when a clamp screw I" is; tightened. At the lower end. of this post isa flange I16 (Figs. 4 and 14) providing. means for, attaching the post directly to the top of. the heater block I22 in the receptacle.

This block is provided with a cast-in electric heating unit I (Figs. Hand 15) of a generally U-shape which extends from the top to the bot-*- tom of the block and: is then turned back on itsell so that the cross loop I82 lies near the top of the" block. A large opening I84 through the block permits the closer approach of the thermoplastic material to the heating unit. In the block I22 there is a short vertical passage I86, which is alined with the. return passage I66 of the-stem and which communicates with a transverse passage. I88 leading to a bushing I90 which forms theseat of a control valve I92. Whenever this valveis open the cement flows freely down the larger size return passage'and. is not forced out. through the nozzle.-

The valve I92 hasa stem I94 (Fig. 12) guided in a stem. guide I96. which isthreaded directly into a lug I91 at the top of. the block so. as to keep: the: stem guide hot. A spring. I98 surround? ing, the-stem. acts normally to push the valve down into closed position. The block I22 is also provided: with a pressure: passage 200- (Figs. 14 and 1.8-)- which is alinedwith the; pressure passage I64 of the postv and-this communicates. directly with. the outlet 202 of a gear pump made up.- of three impel- posedv plates 208', 204, 205 with the. plate. 200: recessedtoreceive adriven gear 206 and. a. meshing. idle.- gear 208;. The first of. these gears is: driven in the. direction indicated by the arrow. inFig.. 1.6 so that: thezcementdrawn. into a recess 2I0, through an inlet opening 2 I3 direct-=1 ly' below-it inthe. bottom plate 205;, is forced into a: larger recess: 2.12: which. communicates". with the outlet 202; 'Ihe-threeplatesare. alined by means of; dowels (showninFig'. 1.6?) and are attached to thBrbQtrtOm of: the. block: I22 by screws; The driven: gear 206: ismounted on. an.- upright: shaft ZIHL: which. is journaled at. the; top and. bottonrofi' the. block; I 22. and. which; lias..a-. nudeportioni ens tending through a recess2l6ythereby to shorten the bearings and to avoid freezing because of hardened cement, should any creep into the bearings. In the bottom surface of the block I22 a groove 2 I5 has been provided which is intersected by the pump shaft 2I4 so that any cement oozing along the shaft may escape back into the receptacle. without being forced into the pump bearmgs.

To drive the pump, the upper end of the shaft 2I4 extends through the cover plate I24 and is joined by meshing pinions 2I8 to a stub shaft 220 provided with a pulley 222 (Fig. 3). The stub shaft is journaled in a block attached to the cover I24. The pulley 222 is driven by a horizontal belt 224 and receives power from a shaft in a gear box 226 which has a shaft 228 driven by a belt 230 connected to a pulley 232'which is attached,

by screws to the end face of a pulley 234 mounted on the drive shaft 24; V

The heater block I22 'also'contains a vertical passage in which there is positioned a manometer tube 236 extending into a terminal box 238 mounted'on the cover I24 and thence to a sylphon-bellows operated switch (not shown) controlling the heating unit I80 so as to enablethe block I22 to be kept at a constant temperature. Provision may also be made fora supplementary heating unit 246 (Fig. 1) mounted upon the very bottom of the receptacle I20 so as to melt first the cement which is adjacent to the pump and thus to avoid the need for melting the whole quantity of cement when starting the machine.

Actuation of the control valve I92 to open it is effected by means of a forked lever 242 (Figs. 11

and 12) pivotally mounted in the bracket 66 which supports the treadle bell crank 64 and this forked lever is connected to the bell crank by means of gear segments 244. The forked lever underlies a collar 246 adjustably mounted on the valve stem I94 and when the treadle is released, provided there is no work in the machine the forked lever lifts the valve I62 so that no cement is forced I out of the nozzle. If, however, the treadle is depressed, thus moving downward the treadle rod 68, the forked lever is moved away from the collar 246 and no longer supports it.

It will be noted, however, thatthe valve stem I94 is then held in its raised position by means of the engagement of a lip 248, screw attached to the lower end of the lever III] and normally extending under a frusto conical collar 258 adjustably fixed on the top of the stem I94. It will be recalled, then, that the lever III] is arranged to be rotated clockwise as viewed in Fig. 12 whenever the insole is pressed against the channel roll I2. The axial movement of that roll is then effective, acting through the collar I04, to move the block I02 which contacts the upper end I08 of the lever H8, thus moving that lever against the tension of the spring I I4 and withdrawing the lip 248 from its position beneath the frusto conical collar 250. This allows the valve spring I98 to push the valve I92 down against its seat so that the return passage or by-pass is closed whereby the circulating cement must go out through the passage of the nozzle I6.

In the use of the machine, an operator depressing the treadle attached to the treadle rod 68 causes the forked lever 46 to move the presser roll I4 outwardly away from the end of the feed roll I0 and the channel roll I2. The same lever 46 acting through the vertical pin 96- causes the channel roll to be lifted away from the feed roll thus providing room for the insertion of the lips 8. L-andL of theinsole between the feed rolls I0 and IZ with the body of the insole I between the ends of those rolls and the presser roll I4. As soon as he releases the treadle, the treadle rod will be lifted=byits spring I8 and the roll I4 will be moved inwardly to grip the insole under the action of the spring 52. Since this pressing of the insole against the end of the channel roll I2 is sufficient to move it axially a short distance (about it; of an inch) then the lever I08, IIO will be moved to release the valve I92 so that the latter will be closed under the action of its own spring I93. At this time, the margin of the insole, positioned between the presser roll I4 and the end of the feed roll I0 (Fig. 8), will prevent the forked end of the lever 242 from rising into contact with the under side of the collar 246, as shown in Fig. I2a, because of the connection through lever 46, link.62, lever 64 and the segments 244. The cement will then be forced out of the nozzle I6 directly into the space between the lips asshown in Fig. 8 and ma position immediately ahead (Figs. 6 and 7) of the point where the lips are gripped together, as shown in Fig. 9, by the coaction of the feed rolls l0 and I2. At the end of an operation upon an insole the operator again depresses the treadle and separates the rolls so that the finished work will be released and the roll will be ready to receive another piece of work. I Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is: 1 1. In a machine for treating channeled insoles, lip-gripping rolls arranged to feed an insole, one of said rolls being frusto conical with its larger end toward the body of the insole, means for urging said rolls into engagement with the insole, a cement-applying nozzle located adjacent to said rolls to deliver cement along a particular path upon the insole as it is fed, and means operated by contact of said larger end with the insole, as the latter is moved to its gripped position, for controlling the flow of cement through the nozzle.

2. In a machine for treating channeled insoles, lip-gripping rolls arranged to feed an insole, one of said rolls being axially displaceable, means for urging said rolls into engagement with the insole, a presser roll spring urged against the unchanneled face of the insole and effective to move axially said displaceable lip-gripping roll, a cement-applying nozzle located adjacent to said rolls to deliver cement along a particular path upon the insole as it is fed, a valve for controlling the flow of cement through said nozzle, and means operated by contact of said presser roll with the insole, as the latter is moved to its gripped position, for controlling the. valve.

3. In an insole treating machine, rolls to grip the lips of a channeled insole to press them together, operator-controlled means for moving said rolls apart to admit said lips, means for urging said rolls into gripping relation, a nozzle for delivering cement to said lips, and means operated by engagement of one of said rolls with said insole for controlling'the flow of cement through the nozzle.

, 4. In an insole treating machine, rolls for gripping the lips of a channeled insole to press them together and to feed the work, means for supporting one of said rolls for movement axially and for movement laterally toward the other roll to grip the lips and press them together, means for delivering cement to said insole as it is fed by said rolls, and means operated by axial displacement of one of said rolls, upon engagement with the work, for controlling the application of the cement.

5. In an insole treating machine, cooperating rolls for gripping the lips of a channeled insole to press them together and to feed the insole, a displaceable support for one of said rolls also permitting axial movement thereof in the support, means for urging said support and its roll into a laterally displaced position, a spring for holding said roll in axially displaced position, a spring for urging said rolls together to grip the lips of an insole when released from the action of said displacing means, said insole bearing against the displaced roll to move it axially against said first spring, means for delivering cement to said insole as it is treated, and means operated by the axial displacement of said roll for controlling said cement delivering means.

6. In an insole lip-setting machine, feed rolls for gripping the lips of a channeled insole to press them together, a nozzle located adjacent to said rolls to deliver cement to the faces of the lips which are to be pressed together, a swinging support for one of said rolls, treadle-operated means for swinging said support, a spring resisting the action of the treadle in displacing said support, means for delivering cement to said nozzle including a valve spring-urged in a direction to initiate the flow of cement, the roll in the swinging support being also displaceable axially in its support, a spring-operated latch for retaining said valve in displaced position, and a connection between said latch and said roll whereby the axial displacement of the roll, by engagement with the work as it is being gripped in the machine, is operative to displace the latch and allow the spring to move the valve into position to effect a flow of cement through the nozzle.

7. In an insole lip-setting machine, rolls for engaging the lips of an insole to press them together and to feed the work, a nozzle positioned adjacent to said rolls to deliver cement to the adjacent faces of the lips of the channeled insole gripped between said rolls, a receptacle, a cementcirculating system for withdrawing cement from the receptacle and delivering it to the nozzle, a by-pass in said circulating system, a springoperated valve controlling said by-pass operative when closed to force passage of cement through the nozzle, a latch for retaining said valve in open position where the cement is circulated through the by-pass, and means in said machine, displaceable by engagement of one of 10 said rolls with the work when the latter is in feeding position, for releasing said latch.

8. In an insole lip-setting; machine, driven feed rolls for pressing the lips of a channeled insole together, one of said rolls being mounted for axial movement, a spring-operated latch connected to said roll to displace it axially, a work supporting roll movable toward and away from the end of said displaceable roll for holding the work against said roll to displace the latter, a

nozzle for delivering cement to the adjacent surfaces of the lips which are to be pressed together, means for causing a flow of cement through said nozzle, a valve spring-pressed to a position to cause delivery of cement to the nozzle, a treadle for displacing said supporting roll, a spring for moving said roll against the action of the treadle, and a connection between said treadle and said valve operative upon release of the treadle to lift said valve against its spring into a position to be caught by said latch when the work passes out of the machine.

9. In an insole treating machine, a nozzle, said nozzle having an enlarged chamber near its outlet opening, a receptacle, an apertured heater block therein, a passage connecting said nozzle chamber to the receptacle, means for forcing cement under pressure to flow from said receptacle to said chamber through said passage, a by-pass leading from said chamber to an aperture in the heater block within the receptacle, and a valve controlling said aperture thereby to control said by-pass.

10. In an insole treating machine, a nozzle, said nozzle having a chamber near its outlet opening, a heated receptacle, a restricted passage connecting said chamber to the receptacle, means for forcing thermoplastic cement under pressure to flow from said receptacle to said chamber, a

larger return passage leading from said chamber to the interior of the receptacle, and a valve in the receptacle for closing said return passage to force the cement to flow out through the nozzle.

HARRY PHILLIPS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,955,872 Cosgrove Apr. 24, 1934 1,991,355 Alexander Feb. 19, 1935 2,111,865 MacKenzie Mar. 22, 1938

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