US2295682A - Machine for preparing welting - Google Patents

Description

sept' 15, 1942- J. R. oLlvl-:R 2,295,682

MACHINE FOR PREPARING WELTING 'Sept l5, 1942. J, R, OLIVER l momma Fon PREPARING wELT'lNG Filed Aug. 2l, 1940 5 Sheets-Sheet 2 www Sept 15 1942- J. R. OLIVER 2,295,682

MACHINE FOR RREPARING WELTING Filed Aug. 21. 1940 3 Sheets-Sheet 3 Patented Sept. 1.5, 1942 MACHINE `FR PEEPARING WELTING John R. Oliver, Beverly, Mass., assignor to United Shoe Machinery Corporation, Flemington, N. J., a corporation `ol" New Jersey `Application August .21, 1940, Serial No. 353,520

(Cl. lll- 43) 7 Claims.

This invention relates vto a mach-ine for preparing welti-ng and is herein illustrated as embodied in a machine 'for applying cement -to a portion of the width of the strip of weltng and for simultaneously winding the strip upon a reel in such a manner that the cement may dry without -contact between the cemented portion and any Vother portion of the strip or of the appairatus.

In the `manufacture of shoes of a stitchdown type, it is sometimes `desired to secure a strip of beveled-edge :welting 4to an outwardly turned lla-nge of the shoe by 'means `of cement `applied to the beveled portion of the strip 'and to lan adjacent portion of the shoe. The cement is applied 4to the Ashoe a short time vvahead of the assembling loperation so that it 'will become tacky and in proper condition to receive the `'cemented welt. VCommonly a `cement made of Neoprene is employed for this purpose, "and it is desirable to allow asimilar `cement 'on 'the welting to dry or glaze lightly so that it may be readily handled when the welting and the shoe are brought together. For this drying operation, the strip may be wound upon a reel and Vit is important that this shall be done in such a way that the cemented surface of the Welting is held free of contact with the reel and free 'of contact with adjacent turns of the strip. The welting which is employed is narrow and thin and the beveled surface to which the cement is to be applied is only about 1/8 in width. This 'renders the workpiece somewhat hard to handle and makes it necessary to restrict the application of the cement to a very narrow band.

An important object of theinvention is to -provide a machine for applying a band of cement to a strip of welting and for immediately winding the strip upon a drying reel.

In the illustrated arrangement the application of cement is effected by a nozzle `positioned closely 'adjacent to the bite of a pair of feed wheels which engage the uncoa'ted portion roi? the strip and drag it .past the nozzle. To maintain the alinement of 'the strip with the operating instrumentalities, a special guide has vbeen provided having a notched portion into which the strip is pressed by a yieldably mounted member arranged to engage the square edge of the strip.

lInasmuch as the strip must be taken up by the drying reel just as fast as .it passes through the cementing portion of the apparatus, without leaving any slack and without creating any tension in the strip, provision has been made lin accordance with another feature of the invention for driving the drying reel by a connection 'to the feed wheels of the cementing mechanism. The feed wheels are separable and 'the arrangement is such that when the feed wheels are brought into engagement with the strip, as by raising the lower feed wheel, a clutch is operated to `complete the driving connection 'to "the drying reel.

The drying reel is mounted `so that the :strip is wound in a helical groove around the reel, and the point of approach of the strip to the reel is shifted along the periphery thereof "by moving the reel laterally so that this point is always in alinement with the guide and the feed wheels of the cementing apparatus. Preferably and as shown, the drying reel has this helical groove formed by notches in a series of bars, and these notches are so designed that a square `corner of the welting is received by them with the coated margin of the strip held Tree of contact with the reel.

These and other features of the invention will be best understood from a consideration of the following description taken in connection with the accompanying drawings, in which Fig. 1 is an angular view of the cementing mechanism and the drying reel connected vtheret0;

Fig. 2 is a detail View on -a larger scale showing a portion of one of the bars of the drying reel;

Fig. 3 is another detail to show the device `for clamping the end of the strip to the reel;

Fig. 4. is an end elevation of the 'head of the cementing apparatus with parts broken away to show the `driving connection to a jack-shaft which is belted to the reel;

Fig. '5 is a longitudinal section through this jack-shaft and the clutch which is embodied therein;

Fig. "6 is an angular View on Va larger scale of the cementing apparatus and the guide for the strip;

Fig. 7 is a front elevation of the .strip-treating portion of this mechanism;

Fig. 8 .is a Vsection on the line VIH- VIII of Fig. 7 through the passage of the nozzle by which cement is applied to the strip.; :and

Fig. 9 is a view looking .down on the feed wheels Ito show the relation thereto of 'the strip guide and the nozzle.

It will be seen from Figs. 1 and 6 that a strip of 'welting W is'drawn through-a guide I `by means of coactin'g feed wheels I"2 and I4 as cement is applied 'to the beveled 'edge 'E (Fig. `2) from `a nozzle I6 and is then wound upon the crossbars I8 forming the periphery of a drying reel 2li.

The cementing apparatus, mounted upon a pedestal 22, is of the type illustrated in Letters Patent of the United States No. 2,073,647,

granted March 16, 1937, upon an application of C. A. Newhall, and comprises a casing 23. In this machine, cement is supplied from a tank 24 to the nozzle I6 by means of a pump (not shown) through a flexible hose 26, and the ow is controlled by a valve 23. This nozzle has a head 30 (Fig, 6) attached by screws to the body of the valve 2'8, and the head is provided with a forked portion 32 to receive a hand screw 34 by means of which the nozzle is adjustably clamped to a support 36 carried at the outer end of an arm 33 which is pivoted at 4I! upon an arm 42 in which a shaft carrying the upper feed wheel I2 is journaled. The position of the arm 38 is determined by an adjustable stop screw 44 which rests against the upper surface of the arm 42. The nozzle is permitted to yield upwardly to accommodate any inequalities in the thickness of the Work against the tension of a spring 46 which extends between a bracket 43 on the arm 38 and a stud 49 on the arm 42.

The nozzle I6 comprises plates 59 and 52 which are positioned upon the head 36 by means of vdowel pins 54. These plates are firmly held in contact with each other and with the head 3E! by screws 56, and a Ypassage 58 in the head (Figs. 7 and 8) communicates with a transverse passage 60 and this in turn communicates with a groove 62 upon the outer face of the inner plate 5I), thus providing a channel for the extrusion of cement from an outlet opening 64 formed in plate 52 just beyond the inclined work-contacting surface 66 (Fig. 6) in close relation to which the beveled edge E of welting W is presented for the reception of a band of cement 68 (Fig. 2) covering this beveled Vedge surface E, and that alone. The lower edge of the plate being higher than the surface 66 on the plate 52, controls the thickness of the band of cement 68. The strip is presented to the nozzle by the coacting feed wheels I2 and I4 which, as may be seen from Fig. '7, grip the upper and lower surfaces of the welting W, and the upper feed wheel I2 is narrow so that it does not contact with the whole width of the strip but only with that portion which is not coated by the nozzle. The lower and wide surface of the strip as here positioned will usually be the grain surface and will be held in a predetermined plane by the smooth lower feed wheel I4 as well as by the guide I0. Since Vthe upper surface of the strip Vof welting is then the fiesh surface, any scars produced by the teeth of the feed wheel I2 will do no harm. The nozzle is substantially opposite the bite of the rolls and when it is desired to clean the same, the attaching screws 56 mayI be removed and the plates separated from one another by means of a screw 69 which is threaded in only the outside plate 52 and bears against the surface of the other plate.

It is not necessary for the operator to guide the strip to the nozzle, since the apparatus is provided with a notched guide block I Il which is supported upon a depending portion 16 (Fig. 6) of a plate I2 which is adjustably secured upon the arm 42 by the stud screw 49. passes through a horizontal slot I4 (Fig. '7) in the plate 12, and the plate and the arm arie provided with a coacting groove and a rib 'I6 so that the movement of the plate is parallel to the axis of the arm. The guide block I0 is attached to This screw the depending portion 'IG by means of a screw 18, and the welting-receiving groove 86 (Fig. 6) in said guide is shaped to t the particular bevelededge welting W which is to be treated. As the welting passes through the guide, it is held against the left side of the groove 6I! by a guide strip 82 extending along the side of the welting as far as the bite of the feed rolls I2 and I4 and bearing against the square edge 84 of the welting (Fig. 2). This guide strip 82, which is thinner than the welting, is mounted at the lower end of a bellcrank lever 86 pivoted on a screw 88 in the plate 12, and the bell crank is urged to rotate in clockwise direction by a spring 9i) which is attached to a pin 92 on the upper arm of the bell crank and to a stud 94 upon the guide block I6. The bell crank is yieldably held against the face of the plate 'I2 by a spring 89 (Fig. 6) compressed between the head of the screw 88 and the face of the lever 86. A locking screw 96 passing through a slot in the upper arm of the bell crank has a flange 98 which may be pressed against the bell crank to lock it in any desired position as, for example, when threading the strip through the guide.

The upper feed wheel I2 is carried upon the shaft |00 (Fig. 6) which is journaled in the arm 42 attached to the casing of the machine and is gear-connected to a shaft IUI which is journaled in an arm |02 and upon which the feed wheel I4 is mounted. This arm I 62 is pivoted at 303 upon the casing 23 (Fig. 1) to swing up and down when a treadle (not shown) attached to a treadle rod |04 (Fig. 4) is depressed, thereby raising the lower feed wheel I4 to carry the welting into coating engagement with the lateral outlet 64 of the nozzle and at the same time to grip the strip of welting W against the under side of the upper feed wheel I2. Too close an approach of the feed wheels is prevented by a stop screw 61.

The upper end of the treadle rod |64 is attached by a pivot block to an arm |66 clamped on a cross-shaft |68 (Fig. 1) journaled in the casing 23. The arm |06 is connected by an upright rod IIU with an arm II2 (Fig. 4) which is secured to a valve-operating shaft ||4 attached to the valve 28 by a connecting rod II6 (Fig. 6) in which are interposed universal joints IIS and |26. This rod III) is also provided with a collar |22 between which and the forked inner end |63 (Fig. l) of the lower feed wheel supporting arm |02 is a spring |24. This arrangement is substantially the same as that shown in the patent and renders it possible to raise the lower feed wheel I4 and open the valve 28 by a single motion of the treadle attached to the treadle rod I |14.

The machine is also provided with a drive shaft |36 (Fig. 4) on which are power-receiving pulleys |32 (Fig. 1) connected by a belt I 34 to any suitable source of power. The drive shaft is geared (not shown) to the interconnected feed wheels I2, I4 and is also arranged to drive a pump (not shown) which forces the coating material through the nozzle I6.

It is essential that the drying reel 20 shall be rotated to take up the strip of welting W as fast as it is delivered by the feed wheels I2, I4 and that the drying reel shall only be rotated when the feed wheels are being rotated. Accordingly, a driving connection to be described below is constructed and arranged to move the periphery of the drying reel 26 at approximately the same peripheral speed as, or slightly greater than, the peripheral speed of the feed wheel I2, I4, and the drying reel 20 is rotatably mounted as will later bedescribed, in a supporting frame |36 (Fig. l). The reel is provided with a power-receiving pulley |38 connected by a belt |40 with a pulley |42 (Fig. frictionally secured to a countershaft |44. This countershaft is journaled in a casing |46 attached by screws |48 (Fig. 4) to the casing 23 of the cementing apparatus. A friction clutch |48 provides the driving connection between the shaft |44 and the pulley |42. The other end of the shaft |44 carries one half |50 of a positive clutch, the other half I 52 of which is formed upon a gear |54 mounted upon 'a sleeve |56 surrounding the shaft |44 and held against axial movement thereon. The clutch half |50 is slidably connected to the shaft |44 by a pin I5! fiattened at its ends. In the casing |46, there is also journaled an inclined shaft |60 which has a gear |62 at its lower end meshing with the gear |54, and a gear |64 at its upper end meshing with a gear |66 on the drive shaft |30. When the clutch |58, |52 is to be closed, a lever arm |10 attached to the cross-shaft |68 is swung upwardly to engage a rounded end |12 upon a plunger sleeve |14 integral with the clutch half |50 and slidable in a cover |16 closing the end of the casing |46. This plunger sleeve |14 surrounds the end of the shaft I 44, and the pressure of the lever arm is eiective to move the clutch member |50 endwise against the tension of a spring |18 between the sleeve and the end of the shaft to close the clutch and start the drive of the drying reel.

'I'he drying reel 20 has end plates I 66 (Fig. 1) interconnected by a series of spaced strips I 8 which form the periphery of the reel and by an axial sleeve |82 which rotates about a rod I 84 supported in the frame |36 and held against rotation by a set screw |86. Approximately one half of this rod is provided with a square thread |88 for coaction with a spring-pressed pin |80 mounted on one of the end plates |80 of the reel. As the reel rotates, this pin and thread cause it to move axially along the rod |84 so that the point at which the strip of welting W is received upon the periphery of the drum is always directly opposite the feed wheels I2, |4 and forward thereof, thus being on the opposite side of the feed wheels from the strip guide I0 and in line with the wheels and the guide. The end of the strip is detachably secured to the reel by a latch |82 (Fig. 3) pivoted upon a bracket |94 attached to one of the strips I8 and provided with a claw I 96 to grip the welting W to the reel. The power-receiving pulley |38 is attached to a sleeve |98 which surrounds the rod |84 and which is provided on its other end with a radially extending roll 200 coacting with a groove 202 on the inner side of a bar 204 attached to the sleeve |82 forming the hub of the reel. By this arrangement, rotation of the pulley |38 is communicated through the sleeve |98 and the roller 200 to the hub of the reel, and the latter, as it is rotated, is caused to move axially at a predetermined rate so that the strip of welting W is wound in a helical groove formed around the periphery of the reel. This groove is made up of a series of notches 286 (Fig. 2) formed along the outer edges of the strips I8 and positloned upon successive strips to form a helix. The notches 206 comprise a square portion 208 with sides substantially normal to one another and arranged to receive the square edge 84 of the welting, but it will be observed that these square portions 288 are tilted with respect to the axis of the reel so that the cement 68 upon the beveled edge E is held away from the reel and so that the strip W, as it is wound upon the reel, naturally slips into the square portion 208 at just the location to make a desired helical formation. As further assurance against smooching of the reel or damage to the cement coating 68, the notches are provided with relieved portions or recesses 2|0 which underlie the beveled edges E to which the coating has been applied. Another latch (not shown) similar to the latch |02 is provided for securing the other end of the strip to the reel when the latter is filled. The reel may then `be removed from its supporting frame |36 by swinging out an arm 2|2 pivotally attached to one end of the frame |36 and formed at its upper end to surround and support the threaded rod I 84. It will be observed that the end of the rod is rounded at 2|4 to facilitate the Swinging of the arm 2|2. The spring pin |00 may then be withdrawn from the thread |88 and the reel slipped endwise over the end of the rod |84 to set it aside for drying and to permit it to be replaced by another reel so that the operation of the machine may be continued. After the reel has been replaced, the arm 2|2 is swung back into position to support the end of the rod |84 and is held in that position by a spring-pressed latch (not shown) mounted inside the arm 2| 2 and engaging a socket in the end portion of the rod |84.

Inasmuch as the strips of welting are long, the machine has been provided with a retaining latch 220 (Fig. 4) which is pivoted upon a pin upon. the outside of the casing 23 and has a linger piece `2554 so that it may be released when desired. This latch 220 engages a notched block 226 attached to the treadle arm |06 and is yieldably held in engagement with said block by means of a spring 228.

In the use of the machine, after a strip of welting W has been threaded through the guide I0 and its end attached to the reel by means of the clamp |92 and assuming that power has been supplied to the pulley |32 on the drive shaft |30, the operator will depress the treadle attached to the treadle rod |04, thereby raising the lower feed wheel I4 to grip the strip between itself and the upper feed wheel I2 and present the beveled edge E to the nozzle I6. At the same time, the operation of the treadle will have caused the opening of the valve 28 and by raising the arm |10 will have started rotation of the reel 28. Then, so long as the machine is kept in operation, the narrow band of coating material, such as cement, is applied to the beveled edge E of the welting W and the welting is wound up upon the reel 20 for drying. An exact location of the beveled edge E with respect to the delivery end of the nozzle is assured by the guide l0 with its presser strip 82 and by the coacting feed wheels I2, I4, the bite of which is directly beside the nozzle.

Having thus described my invention, what I Y claim as new and desire to secure by Letters Patent of the United States is:

1. In a coating machine, coacting feed wheels engaging a portion of the width of a strip of beveled-edge welting, a notched guide to the rear of said feed wheels, considered with respect to the direction of feed, means for pressing the welting into the notch of said guide, and coating means including an extruding nozzle having an inclined surface provided with an outlet opening and positioned closely adjacent to the bite of said feed wheels and arranged to apply a coating material to the beveled edge of said welting.

2. In a coating machine, driven feed wheels arranged to grip the top and bottom surfaces of beveled-edge welting at a point removed laterally from the beveled edge and to hold the welting in a predetermined plane, a nozzle positioned closely adjacent to the bite of said feed wheels and having a work-contacting surface provided with an outlet opening opposite to the edge surface of the welting and inclined with respect to the grain surface of the welting gripped by said wheels for delivering coating material to the beveled-edge surface, and means for supplying said nozzle.

3. In a coating machine, coacting feed wheels engaging a portion of the Width of a strip of welting, a notched guide to the rear of said feed wheels, considered with respect to the direction of feed, a spring-pressed strip for urging the welting into the notch of the guide, and coating means substantially beside the bite of said feed wheels, said pressing strip extending forward to a point substantially opposite to said coating means to hold the strip in contact therewith.

4. In a machine for applying coating material to a strip of welting, a coating nozzle having a lateral outlet, a displaceable strip-support adjacent thereto, a guide for both edges of the welting to the rear of said nozzle, considered with respect to the direction of feed, a reeling device forward of said feed wheels, a drive shaft to which power is supplied, a driving connection between said shaft and the reeling device, said connection including a clutch, and operator-controlled means for moving said stripesupport to carry the welting into coating engagement with the lateral outlet of said nozzle and for closing said clutch to drive the reel.

5. In a machine for applying coating material to a strip of welting, coacting feed wheels at least one of which is driven and one of which is mounted for movement toward and away from the other feed wheel to grip the strip, a strip coating device adjacent to said feed wheels, a guide for the strip to the rear of said feed wheels, considered with respect to the direction of feed, a strip reeling device forward of said feed wheels, a driving connection between the driven feed wheel and the reeling device, said connection including a clutch, and operator-controlled means for bringing said feed wheels together to grip the strip and for closing said clutch to drive the reeling device.

6. In a machine for applying coating material to a strip of welting, feed wheels for moving the strip, coating means including a nozzle adjacent to said wheels, a Valve for controlling the delivery of coating material to the nozzle, a strip guide and a reeling device upon opposite sides of said wheels, means for supplying power to drive at least one of said feed wheels, a driving connection between the feed wheels and the reeling device, said connection including a clutch, and a single operator-controlled means for starting the feeding operation, opening the valve, and closing the clutch to drive the reeling device.

7. In a strip-coating machine, means to apply coating material, coacting feed wheels to grip the strip and move it progressively past said coating means, a guide for the strip to the rear of said feed wheels, considered with respect to the direction of feed, a receiving reel forward of said feed wheels, common means to drive said feed wheels and said reel at approximately the same peripheral speed, and means to displace said reel axially as it rotates to keep the receiving point upon the reel in a line intersecting both the guide and JOHN R. OLIVER.

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