US2352656A - Coating machine - Google Patents

Description

H. PHILLIPS COATING MACHINE July 4, 1944.

Filed June 5, 1943 4 sh ets-sheet 1 $3 v3 u n %\w I. QQ I n %%I 3% 8 r I p 1 .u H. M PM- 1 I H. PHILLIPS COATING MACHINE July 4, 1944.

Filed June 5, 1943 4 Sheets-Sheet 2 H. PHILLIPS COATING MACHINE July 4, 1944.

Filed June 5, 1945 4 Sheets-Sheet 4 Patented July 4, 1944 Shoe Machinery Corporation, Flemington;

N. J}; a' cor'porationof New Jersey H Application ru es, 1943, Serial No. 489,831

22 Claims.

This invention relates to coating machines and is'herein illustrated as applied to a machine, for

coating the inner channel and the side face of the rib of aninsole to which a strip of reinforcing'material is tobe applied, of the type shown I in "Letters Patent of the United States No. 2,307,793, granted Ja'nuary 12, 1943, upon the application of Joseph Rf J. Ioannilli.

' When it'is desired to' reinforce an insole by strips of fab'ric material'adheringto the inner side of the rib and extending across the inner channel, it is important that the adhesive coating material shallbe' well distributed by the coating machine, upon the angularly related surfaces of 'the rib and the'channel and as well upon a'por- 1 tion of the midsurface of the insole. Furthermore, such machines, to be'commercially practical, must feed the work'at ac onsiderable speed and, in so'do'i'ng, it'is found that there is danger that the flow of adhesive to be applied to the work will not start imniedi'ately and, consequently, that there will be a short portion of the length of that peripheral area which is to be coated which will be bare. Consequently, an important object of the invention is the provision of an organization affording still further assurance of an adequate flow of coatinginat'erial at the very beginning'of the feeding movement. a 7

Consistent with that object, aiea'ture of the invention resides in mechanism for momentarily providing an excess of coatingmaterial at the point of application at the beginning of an operation upon a piece of work.

In machines for coating small pieces presented one after another, it is usually desirable to separate the parts of the work-feeding mechanism to facilitate 'the introduction of a piece of work and to provide operator controlled mechanism for both. causing the feedmechanism to grip the work and starting the flow of coating material. Still another feature of the invention resides in such anoperator-controlled means, illustrated.

herein as utilized to open'a valve controlling the 'supply of coating material momentarily beyond its normal operating position as the work is presented to the machine and then to return the valve, after a brief interval, to an operating position where the valve opening is sufficient for the normal supply of coating material.

As illustrated, the valve-operating mechanism 7 is provided with a latch designed to hold it open in its normal operating position, and operatorcontrolled mechanism, such as a treadle, is provided with a cam which will push the valve beyond its normal position and, then releaseit for retention by the latch in its normal operatingposition. Preferably, also, thelatched position is made adjustable.-

These and other features ofthe invention will best be understood from a consideration iofwthe following specification taken-in connection with the accompanying'drawings, in which l v Fig; 1 is a-side elevation ,of the: machine Fig: 2 isa planviewer-levers,embodied ina treadle mechanism? Fig. 3 is an angular view of the operating parts of themachine, showing a piece of work in coatingposition;-

"Fig. 4 is an angular view of an insole which has been coated in thismachineandshowing a'short piece of the reinforcing tape alreadyapplied;

in Fig.8; and.

Fig. -5 is a 'sideelevatiom ona larger, scale than Fig. 1. showing the parts of the machine which are near the work; I

Fig. 6 is an angular view-of a portion -ofthe nozzle removed fromits working position;

1 Fig; '7 is'an-endview of the machine taken from th'eleftinl igl; wv Fig. 8 is a front elevation, -greatly;enlarged,-of the nozzle; 1 1

Fig. 9 is a horizontal section on the lineIX- -IX Fig; 10 is a vertical section on the *line-X,-Xin

Fig. 8.

Referring particularly to {Figs '3 and 4*, there is shown an insole I which-has'been channeled to provide an upstanding rib l 0, and to which adhesive coating material has been applied on the inner surface of this rib and on--the adjacent channel I2," as well as on-a portion of the midsurface 14, to make sure that there'is sufi'icient width of adhesive to firmly attach the inner'edge of a reinforcing tape l6 the-other edge of which isfiush with thetop of the rib. When 'suclra piece of work is in position in the machine, asin Fig; 3, the feather I 8 of the insole-is gripped-between a driven upper feed wheel 2!! and a lower feed wheel 22 (F'ig. 5), while a coating is applied by-means of a nozzle 24- a-nd distributed by a brush 26; Assurance of the proper coatingof the innersurface of the rib is given by the employment of a freely rotatable spindle 28 having at its lower end a frusto-conical portion 39 pro vided with spiral ribs. ,This portion 30 bears against the inner face of the rib and holds "it against the frusto-conical end face 32 (Fig. 5) of the upper feed wheel 2! Control of the flow of coating material-to the nozzle-from a source of supply (not shown) as by gravity through a flexible tube 34 is effected by a valve rod 36 (Fig. I8), having a conical end, in a way which will be later more fully described.

As more particularly shown'in Fig. 1, the upper feed wheel 28 is mounted on the end of a shaft 48 extending through an arm 42 which is attached to the end face of a hollow frame 44 which may be supported in any desired manner, such as by a column 46. The lower wheel 22 is carried by a shaft 48 journaled in an arm 58. This arm is swingably mounted by means of pivot screws 52 carried in flanges 54 forming part of the frame, thereby permitting the lower wheel 22 to be raised into gripping engagement with the work. The two shafts are. interconnected by.

gears 56 and 58, and power is supplied to the machine through a drive shaft 68which receives frame 18 carried on a pivot pin 12 which is sup-' ported by two arms Hand 16" (Figs. '3 and 7) which form part of an extension 18 attached to the top of the frame 44. This swinging frame I8 is provided on its end face with a vertically disposed groove 88 in which' there is received a U- shaped block 82 held at the right height by screws 84 (Fig. 5) passing through slots in the swinging frame 18. The horizontal lower portion 86 of this U-shaped block 82 has a downward extension 66' to provide the front face of the nozzle 24 and to thisthere is attached a nozzle block 98 (Fig. 6) cut away to make room for the spindle 28 and having a recess 92 leading downward toward an outlet opening 64 (Fig. 10). Preferably, a shallow dam 93 (Figs. 8 and 10) extending between the points 96 and 68 keeps the recess 92 filled'at all times. Since the point 96 is higher than the point 98, part'of the coating material will flow later-ally on the frusto-conical portion 38 of the freely rotatable spindle to be spread on the insole rib I8, while another portion will flowdirectly downward onto the work and be distributed by the brush 26. This brush, as may beseen from Fig; 10, is inclined rearwardl'y with respect to the direction of feeding movement of the-work (see the arrow in Fig. 3) and, hence, the bristles thereof will be radically deflected by contact with the work, in accordance with the teaching ofLetters Patent of the United States No. 2,208,694, granted July 23, I940, upon the application of Joseph Barbati. Being so radically deflected, the bristles spring back more readily when relieved of contact with the work. It is found desirable to trim the lower end of thebrush, as shown in Fig. 8, so that one portion I82 which bears upon the bottom of the channel is longer than the adjacent portion I84 which bears upon the mid-portion P4 of the insole. Artificial bristles made of Nylon filaments are found to have long-wearing qualities and to be more readily cleaned from coating material, such as latex or rubber cement, than are natural bristles. The bristles are retained within a brush back I36 which at its upper edge abuts a block I88 and is held against horizontal movement by an interlocking projection I81 (Fig. 8). The block I88 is attached to the far of the nozzle by screws which also serve to hold a brushretaining spring plate I I8 (Fig. 10).

' Coating materialis supplied to the nozzle by the tube 34 (Fig. 3) which is clamped to a nipple I I2. made separately and then press-fitted into the downward extension 86 of the horizontal lower portion 86 of the U-shaped block 82, which portion forms the front plate of the nozzle. The nipple is closed at its right end by a clean-out screw H4, and it has a squared portion II6 over which an upper arm I I8 (Fig. 6) of the removable nozzle portion 98 is slipped. 'I'hearm .I I8 is integral with an upright portion II1. This removable nozzle portion 98 is then clamped against the fixed nozzle portion by a knurled nut II9 (Fig. 9) received on a threaded portion of the nipple. After the nipple has been press-fitted into the block portion 86, a hole is drilled through its upper wall to receive the valve rod 36, and a square-bottomed recess 81 is made in the inner face of the nipple. Another smaller hole I2I is drilled through this recess to provide a circular sharp-edge valve seat cooperating With the ta- Dered end of the valve rod 36. This smaller drill hole I2I may extend slightly into the upper portionof the recess 92, but the dents formed as a result have no function.

- This same U-shaped block 82 which carries the nozzle also provides a support for the rotatable spindle 28 and for the valve rod 36-(Figs. 3 and 5). The spindle 28 passes freely through the lower arm 86 of the block, and its up-and-down movement is limited by a pin II-9 entering a groove in the spindle 28. The pin is carried by an'adjustable plate I28 held in place by a screw I22 passing through a slot in the plate; The valve rod 36' passes through a stuffing box I24 (Fig. 10) and has an enlargement I26 (Fig. 5) received in a passage in the upper portion of the block 82, and a reduced upper portion I28 which passes through a screw I38 retaining a spring I32 which rests upon the enlarged portion I26 and urges the valve rod to closed position. Operation of the valve rod to openthe valve is effected by means of a lever having a pivot I33 journaled in an outwardly-extending flange I34 (see also Fig. I) provided upon the swinging frame 18. This lever has ashort arm I36 clamped on the pivot I33 and which is forked to surround the valve rod beneath the enlarged the upper flange I42 and the top of said arm. At

its lower end, the operating rod I48 is provided with a pivoted latch I52 urged to the right by a leaf spring I54 (Figs. 1 and 5) and having a notch I56 which will catch on a rectangular abutment plate I68 also carried by the swinging frame 18 to hold the valve open in running position. The abutment plate I68 is secured to the lower end of a vertical carrier rod I62 the position of which may be adjusted by means of a nut I64 (Figs. 1 and 5) resting against the upper flange M2 (Fig. 7) of the swinging frame. Rotation of the rod in its abutment is prevented by a pin I66 (Fig. 5) in the rod which passes through a slot I68 in the far side of the swinging frame 18. At its lower end, the latch I 52 has a cam roll I18 which'may be engaged by the upper surface of'a wedge-shaped cam I12. The cam I12 is formed on the upper end of an arm I14 attached by a bill bolt II6to a cross shaft I18 which-is journaled in a bracket'I'BO attached to the frame; V

Supported on the bracket I8!) is an extension I82 on which there is carried a work table I84. It should be noted also, from Fig"sflfti n'd 5, that a scraper plate I9Il bearing against'the lower feed wheel 22 to keep it cleanis attached to an arm I92 which' is supported on theunde'r side of the swinging arm 50 and is held' in position thereon by a screw I94; Gagesfor the guidance of the work in a direction atan'acute angle to a plane normal to the axesof thefeed wheel shafts and substantially normal to the length of the outlet opening 94 are secured to the upper wheel arm 42. These comprise an angle plate I96 (Fig. 3) held by a screw I91. This plate has an extension I98 having an end face I99 ser'vingas a gage and also to support the insole'rib so that it cannot be crumpled by the feed wheels. The extension is tapered at its farside soas toextend as close as possible to the two feed wheels. A depending gage 266 has a slotted "shank 202 and'ish'eld' by a screw 264; The gage 260 is effective to stop turning movement of the insoleas' it isswun rapidly around its toeend. f

In order, now, thatthe' operator may control the swinging of the bracket Ill, the raising of the lower feed wheel arm 59 and thelifting'of the valve rod 36, a control mechanism is provided which may be actuated by a treadle-(not shown) connected to a treadle rod'ZIII (Figs. 1 and' 2) which extends up through the column 46*and'is connected to the midportion of a leverarm 2I2 which is secured toa rockshaft' 2 l4 journaled in the frame 44 of the machine and extending out through the left side thereof, as viewed in Fig.1. Downward movement of the arm 2 I 2 is limited by a stop screw 2I6 as it engages the bottom ofthe frame 44, and this same armfis provided with an upwardly-extending rod 2I6 (Figs. 1 "and 2) which passes through; a block 220 received in an extension 222 of the pivotedlower' arm 56which carries the lower feed wheel 22. 'Surrounding the upper portion of this rod 2I3is a spring 224 which rests against a washer on top of the block and, to provide a lost-motion connection; the

rod 2I8 has a collar 226 which'maybe brought down against the spring. thereby resiliently to lift the lower feed wheel. Secured to the extension 222 of the wheel-carryingarm isa forked plate 228 which has abutment sorews'230 and 232 cooperating with the upper and lower 'f'ac'e's of'a plate 234 secured to apart of'the frame which forms a bearing for the drive shaft 66; These raised when, no insoleis in place. 'I'heleft end of the rockshaft 2I4 is provided with a lever '236 which is pinned to the shaft and which is. at its far end, loosely connected to an upwardly-extending rod 240 which has, at' itsupper end, a

cylindrical crossbar 242 (Figs, 1 and '7) adapted to be received in a cupped end 244 (Fig. 5) of a lever arm 246 pinned to the pivoted rfod I2 which supports the swinging frame I0. As the treadle spring 256.

rod 210 is depressed, the rod 240 is raised/seas thereby to lift the lever 246 through a compression spring 250 surrounding the rod 241i and pressing down against a thumb nut 252 threaded thereon. By this 'arrangement, the liftingfof the rod effects a yielding movement of thei swiriging n frame T0 to carry the frusto conic al portiontfl of the spindle 28' against the inner sideof the insole rib to hold the latter against the end face 32 of the upper wheel2fl. This movement is limited, to avoid allowingthe portion 30 to strike the feed wheel, by a stop screw 253 in the frame extension18' and positioned to contact the top of the swinging frame I0. On the other hand,' when the treadle is released, the rod 240. will move down, and the bar 242 atthe upper end of it will engage'the cupped portion 244 of the lever 246 positively to swing the frame I6 so as to'carry the nozzle away from the rib ID of the insole.

On the near end of the lever 236 is pivotally attached a short upstanding'rod 254 which passes through a vertical slot in a lever arm 256 secured to the" cross shaft I I8. On this short rod 'is a transversely extending roller 256- which is received in: an inclined slot 260 (see also Fig. 5) in the lever arm 256, thereby providing a freely acting yet firm connection between the treadle-operated lever 236 and the cross shaft'I'I8 w'hich carries the cam I12. I V

As a result ofthis arrangement of the control mechanism, the operator can, when presenting a piece of work supported on the table I84 with the toe end toward himself, so position this work that the end of the insole rib will lie between the spindle and the upper feed wheel, thus brinding the feather I6 in position to be gripped by, the two feed wheels. As he depresses the treadle connected to the treadle rod 2I0, however, the lower feed wheel will not be raised immediately because of the space between the collar 226 and the top of the spring 224, thus giving time for the upward movement of the rod 240 to release the swinging frame 76 and then to allow the spindle of thenozzle to grip the rib against the face of the feed wheel under the action of the At substantiallythe same time, the cam I12 will be carried from the position illustrated in Fig; 1 to the position illustrated in Fig. 5. In so doing, the valve rod 36 will be raised momentarily '-by' the treadle-operated control mechanism to allow an'excess supply of coating material to flow into the nozzle and thus to insure an adequate supply at the outlet of the nozzle so that the coating operation will start as soon as the lower feedwheel has been raised into the gripping position which is shown in Fig. 5. During this normal feeding operation, the valve will be held open; after release by the cam, by reason of the engagement of the latch I52 "with the abutment plate I66 and to a degree determined by the adjustment of the thumb screw I64 on the upper end' of the rod I62 which carries the abutment plate. On the otherhand, when the end of the insole'rib nears the coating position, the operator will be able quickly to shut off the supply of cement as the insole is disengaged from'the feed wheels, the reverse movement of the cam "2 being effective to knock the latch I52 from the abutment plate and to permit the instant closing of the valve. As soon asthe valve 36 has closed,ithere' will besuch a small amount of cement in the recess 92 of the nozzle that there is substantially no danger that it will flow out through the outlet opening 94 and, with a little practice, the operator is able to draw the insole gressively upon a piece of work, an applying device, and operator-controlled means for regulating the supply of coating material to the device, including meansfor supplying a momentary excess of coating material at the beginning of an operation. 1

3; In a coating machine, an applying device, a driven work-engaging device, operator-controlled means for gripping a portion of the Work against said driven device to cause feeding movement of the work, and means'operated in timed'relation to the movement of the operator-controlled means for momentarily changing the quantity of material supplied to the applying device as the work is gripped.

4.' In a coating machine, an'applying device, a slide valve controlling the supply of coating ma terial to said device and having a normalpperating open position, andoperator-controlled means for opening said valve by sliding it beyond its normal operating position as the work ispresented to the machine and then releasing the valve.

5. In a coating machine, an applying nozzle, a valve controlling the supply of coating material to the nozzle, and operator-controlled means for opening the valve to supply an excess of coating material and then returning the valve, after an interval, to an operating position where less coating material will be supplied.

6. In a coating machine, a nozzle, a springoperated valve controlling the supply of coating materialto the nozzle, means for retaining said valve against the force of the spring in a normal operating position, and operator-controlled means for opening the valve beyond the normal operating position and then allowing it to be brought back by the spring to normal position.

7. In a coating machine, a nozzle, a springoperated valve controlling the supply of coating material to the nozzle, means for retaining said valve against the force of the spring in a normal operating position, and operator-controlled means for opening the valve and then releasing it to the action of said retaining means, whereby the open valve will be held open, unaffected by slight unintentional movements of the operatorcontrolled means.

8. In a coating device, a driven feed wheel, a work support, said wheel and support being mounted for relative movement, a coating device, means controlling the supply of coating ma terial to that device, and operator-controlled mechanism arranged to cause a relative movement between the feed wheel and the support, thereby to cause them to grip the work and feed it, said means being also operative momentarily to increase the supply of coating material to the coating device as the work is gripped by the feed wheel.

9. In a coating machine, a coating device, a spring-operated valve for regulating the supply of coating material to that device, a latch for holding the valve in a normal open position, and means for pushing the valve beyond that normal position and then releasing it to the action of the latch.

10. In a coating machine, a coating device, a spring-operated valve for regulating the quantity of coating material supplied to the device, said a operator-controlled means for changing the, po

sition of the movable part of the gripping means to cause it to engage thework and moving said valve latch beyond said abutment and substantially immediately releasing it to engage the abutment without releasing the work. i l

12. In an insolecoating machine, a work-en;- gaging driven feed wheel, a movably mounted nozzle, a valve controlling the flow of coating material to the nozzle, and operator-controlled means for moving the nozzle to grip the work against the feed wheel and substantially simultaneously opening the valve.

13. In an insole coating machine, a work-engaging driven feed wheel, a nozzle movably mounted to grip a rib of the insole against said feed Wheel as it coats one side of'the rib, a valve controlling the flow of coating material to the nozzle, and operator-controlled means for moving the nozzle and opening the valve in timed relation to the movement of the nozzle.

14. In an insole coating'machine, a driven Workengaging feed wheel, a nozzle, for coating one side of a rib of the insole, mounted for bodily movement to grip the rib bet-ween itself and the feed wheel, and operator-controlled mechanism controlling the supply of coating material to the nozzle and the bodily movements of the nozzle, said mechanism being also operative momentaril to supply an excess of coating material to the nozzle without interfering with the subsequent normal supply to the nozzle.

15. In a coating machine, a nozzle, a nozzle support movably mounted on themachine to carry the nozzle into engagement with the work, a valve for the nozzle mounted on said support, a valveoperating lever pivoted on the support, and means carried by the support for retaining the valvein open position.

16. Ina coating machine, a nozzle, a nozzle support movably mounted on the machine to carry the nozzle into engagement with the work, a valve for the nozzle mounted on said support, a valveoperating lever pivoted on the support, and adjustable means carried by the support for retaining the valve in a predetermined open posi tion.

17. In a coating machine, a coating device, a valve for controlling the supply of coating material to the device, valve-operating means including means for retaining the valve in open position, and a cam movable past said operating means momentarily to permit the passage of an excess supply to the nozzle and then to release the operating means for a return to its normal open position.

18. In a coating machine, a coating device, a valve controlling the supply of material to said device, spring-operated means urging said valve toward aclosed position, and a cam movable into and forward in a continuous path out of engagement with the spring-operated means to cause a momentary excess of coating material to be supplied to said device.

19. In a coating machine, a coating device, a valve controlling the supply of coating material to the device, a spring-operated member for closing the valve, a latch co-operating with said member to hold the valve in open position against the force of the spring, and cam-operated means for opening the valve beyond its latching position and then releasing it to the control of the latch.

20. In a coating machine, a nozzle, a valve controlling the supply of material to the nozzle, a spring-operated rod urging the valve to closed position, a roller on said rod, a latch for holding the rod in a position where th valve will be in normal open position, and a cam movable against and past said roller to move the valve beyond its normal position and then release it to the latch.

21. In a coating machine, a nozzle, a valve controlling the supply of material to the nozzle, a spring-pressed rod connected to said valve, a pivoted latch on said rod, said latch having a roller, and a cam movable to engage said roller to move the rod beyond the position necessary for engagement of the latch and then to release it.

22. In a coating machine, a nozzle, a valve controlling the supply of material to the nozzle, a spring-pressed rod connected to said valve, a pivoted latch on said rod, said latch having a shoulder, a cooperating abutment adjacent to the latch for engagement by said shoulder, a spring urging the latch toward the abutment, and a cam movable first to push the rod toallow the latch to catch on the abutment and movable then to knock the latch ofi the abutment.

HARRY PHILLIPS.

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