US1981956A - Latex applying top cementing machine - Google Patents

Description

Nov. 27, 1934. B. JORGENSEN LATEX APPLYING TOP CEMENTING MACHINE Filed Sept. 19, 1932 2 Sheets-Sheet 1 igil Nov. 27, 1934. B JORGENSEN 1,981,956

LATEX APPLYING TOP GEMENTING MACHINE Filed Sept. 19, 1932 2 Sheets-She'et 2 Patented. Nov. 27, 1934 LATEX APPLYING TOP CEMENTING MACHINE Bernhardt Jorgensen, Beverly, Mass., assignor to United Shoe Machinery Corporation, Paterson, N. J., a corporation of New Jersey Application September 19, 1932, Serial No. 633,810

23 Claims.

This invention relates to cementing machines and is herein illustrated as embodied in a machine of particular utility in applying stripes of latex to the margins of the tops or uppers of shoes.

One object of the invention is to provide an improved cementing machine adapted for applying controlled coatings of latex to work pieces of varying thicknesses.

Machines for applying naphtha-cut rubber ce ment to boot and shoe parts are usually not well adapted for the application of light bodied cements such as water-dispersed latex, hereinafter referred to as latex, because of the high fluidity of the latex and the difficulty of controlling its flow from an overhead container. Other difliculties are encountered because of the tendency toward coagulation of the latex. Thus when dealing with cements having the fluidity of latex, for example, it is desired to control accurately the quantity of cement applied, to be able to start the machine after a period of disuse with a minimum of cleaning of the cement applying parts, to avoid coagulation within the machine itself; and to avoidthe dripping of latex upon other parts of the machine, especially those which may come into contact with a clean surface of a piece of work.

Still further problems are involved when it is desired to apply latex to the topsof rubber-soled shoes of the tennis or sneaker type because of the fact that the heel portions of these tops include a junior or counter-like element which is stitched to the fabric upper or top somewhatspaced from the edge thereof. When, therefore,

it is desired to apply a marginal stripe of cement to the inner face of the top of a tennis shoe prior to lasting, it is necessary to operate on at least one portion where the thickness of the work is not uniform across the whole width of the margin to be coated.

In view of the foregoing and in accordance with features of the invention/the illustrated machine is provided with an applying nozzle which is located closely adjacent tothe bite of superposed work feeding rolls. Cement delivered under pressure to this nozzle at the will of the operator is applied on the upper surface of the piece of work where the operator can see just what part of the work is being coated. The tendency of a thin cement to spread laterally over the surface of the work after it has been applied is overcome in the illustrated machine by making the upper feed roll a recessed roll with rather sharp flanges which indent the surface of the work. This construction permits the nozzle to be positioned within the recess of the upper roll substantially at the bite of the rolls and theadjacent flanges provide dams for preventing lateral spread of the latex as well as overcoming 0 by the indentations provided in the work any tendency of the latex to spread by capillary action.

In the illustrated machine great facility in cleaning the operating parts of the machine is 5 provided for, by arranging for easy removal of the outer flange of the upper ,feed roll immediately adjacent to-the nozzle, and by providing an easily displaceable cover over part of the outlet of the nozzle.

Provision for uniform treatment of the work, even in those portions where the thickness of the work is not uniform, is provided in the illustrated machine by supporting the outer flange of the upper feed roll resiliently and, as illustrated, by means of rubber plugs which allow the flange to yield.

The control of the flow of latex through a nozzle suggests the use of a valve. There is provided, in the illustrated machine, operator- 1) controlled mechanism for gripping the work to feed it by raising a lower feed roll and for simultaneously operating the valve.

These and other features of the invention are described in the following specification. While particular reference has been made to the appli cability' of the machine to coating shoes or shoe parts, and to the use of latex, it will be understood that, in various of its aspects, the invention is not limited to such use nor to the employment of any particular form of adhesive.

In the drawings,

Fig." 1 is a side elevationof a machine constituting a preferred embodiment of the invention, the elevation being taken from the operators left and parts being broken away;

Fig. 2 .is a front view of the feed rolls and the applying nozzle, with the nozzle partly in section;

Fig. 3 is a vertical section through these parts on the line IIIIII of Fig. 2;

Fig. 4 is a vertical section through the control valve; v

Fig. 5 is an angular view of the parts shown in Fig. 2, showing a tennis shoe top in working position in the machine; and

Fig. 6 is an enlarged view of the grooved end of the applying nozzle, with cover removed, showing the relation of the nozzle to the work and to the feed rolls.

In this machine, as in the machine of Letters Patent of the United States No. 1,380,360, granted June '7, 1921, upon the application of J. W. Cosgrove, the cement reservoir 10 is formed integralwith a supporting frame 12 in which is journaled a shaft 14 for an upper feed roll 16 and in which is pivoted at 18 an arm 20 having a shaft 22 carrying a lower feed roll 24. Fast and loose pulleys 26 for a driving belt 28 are connected by suitable gears 30 to the shafts 14 and 22 so that the feed rolls are rotated with their work contacting surfaces moving in the same direction. To raise and lower the under feed roll 24, an operator-controlled rod 50 is connected to a bell crank 52 the upper end of which carries a roll resting in a peculiarly shaped notch 54 in a. short lever 56 pivoted at 58 on the frame and notched at its outer end to receive a square portion of a pivot 60 in the arm 20. When the parts are in the positions shown in Fig. 1, the arm 56 is held substantially rigidly by the bell crank lever, and provision for slight yielding movement of the roll carrying arm 20 is afforded by a spring 62 acting upon a plug which presses against the lower face of the transverse pin 60, this spring being carried within a recess in the arm 56. These parts are constructed substantially as in the Cosgrove Patent No. 1,380,360 mentioned above.

Departing from the patented construction, the cement tank 10 herein is provided with a tight cover 32 carrying an air pump 34 which is provided with an inlet valve 36 and an outlet valve 38 and which is driven by a pitman 40 from a crank gear meshing with the gears 30. The cover 32 is also provided with an auxiliary filling cover 42 having an adjustable relief valve 44 and on the main cover 32 is mounted an air gage46. By properly adjusting a thumb nut 48 to vary the tension of. a spring bearing against the relief valve 44, it will be possible to maintain the air pressure above the body of cement at any desired value.

Progressive movement of a piece of work such as the top 64 of a tennis shoe, illustrated in Fig. 5 as turned wrong side out, is effected by means of the feed rolls 16 and 24, ,the work being guided by bringing its edge into contact with the vertical face of the gage 66 (Figs. 2 and 3) beneath a projecting pin 68 which prevents the work from being caught between the top of the gage and the upperroll.

The upper feedroll comprises spaced, sharp edged flanges 70 and 72 (Fig. 3). flange 70 is formed upon a hub member 74 received upon a reduced extension of the shaft 14 and driven therefrom by a tongue-and-groove connection 76. The outer flange 72 is formed upon the inner face of a cup-shaped member 78 which has upon its inner periphery four approximately semi-circular recesses 80 (Fig. 2) to receive rubber plugs 82. These rubber plugs are substantially cylindrical and are received within corresponding substantially semi-circular The inner out interrupting the feeding action of the coacting rolls. A removable cover 88 has a projecting pin received in an axial recess in the reduced extension of the hub 74 and is held therein by a short pin on a plate 90 urged against the cover by a spring 92. The spring 92 is mounted upon a pivot pin 94 around which the plate 90 may be rotated or turned aside to allow removal of the cover 88 and a disassembling of the upper feed roll 16.

The application of latex in a stripe 96, as indicated in Fig. 5, is efiected by means of a nozzle 100 positioned between the flanges 70 and 72 of the upper feed roll and pivotally mounted on a pin 102 in a plate 104 attached to the front of the tank 10. A spring 106 secured to the left end of the nozzle 100 draws the applying end down to a position determined by the setting of a stop screw 108 which passes through a lug on the nozzle and abuts an edge of the plate 104 This nozzle is provided with a longitudinal restricted passage 110 of small diameter which terminates in an upright recess 112 occupying a large part of the end 114 of the nozzle. recess forms a ribbon-like expanded outlet in which the plane of either broad side forms-an acute angle with the work and with the passage 110. A cover 116 attached by means of a screw 118 overlies this recess and, as the cement flows through the passage 110 under pressure, it fills the recess 112 and is delivered in a sort of ribbon which flows down the groove 120 forming an extension of the recess 112 and on to the upper surface of the work 64 upon the righthand side of the nozzle. The marginal portions of the nozzle which are adjacent to the groove 120 rest upon the work and help to define the applied ribbon of cement. The nozzle is provided on its under side with a rounded heel-like portion 122 which presses against the ribbon of cement or latex applied to the upper side of the work and forces it into the work, spreading it slightly to form a stripe which is limited by the spacing between the flanges '70 and 72 of the upper feed roll. Pressure of the sharpened edges of these flanges 70 and '72 is such as to make indentations in the upper surfaces of the work which, to a large extent, prevent spreading of the stripe of cement due to capillary action. The proper position of the rounded lower portion 122 of the nozzle is effected by adjustment of the screw 108. 1

Control of the flow of latex through the nozzle is effected by means of a poppet valve 130 (Fig. 4) here shown as a spring-pressed ball valve within a chambered housing 132 (Figs. 1 and 4).

This housing, held by bolts 133 to a bracket ing an upper compartment 134 connected by means of a pipe 136 to the tank 10, and a lower compartment 138 connected by means of a pipe 140 to the nozzle. A pet-cock 142 permits drainage of the tank and the upper compartment 134 when it is desired to change from one color of latex to another. A top cover 144 for the valve housing 132 is secured by screws extending through a suitable gasket and is provided with a'cylindrical projection 146 supporting a filter screen 148 through which the latex must flow before entering the passage 150 between the compartments 134 and 138. The passage 150 is formed in a partition 152 between the two compartments and acts as a valve seat for the ball valve 130 as the latter is pressed into engagement therewith by a spring 154 held against dis- This placement .by a socket 156 in the top cover. This valve number 130, being always immersed in latex, has no tendency to stick or leak and the relatively sharp edge of the valve seat is self cleaning.

In view of the well-known tendency of latex to coagulate when exposed to the air and the difliculty of preventing it from freezing in the bearing surfaces of tightly fitting, relatively movable parts, there has been provided here an O arrangement for operating the valve 130 which does not require any such sliding fits of cementcoated parts or permit any exposure of latex to .the air. Accordingly, the lower compartment 138 is closed by meansof a flexible diaphragm 160 the periphery of which is clamped tightly in position by means of a bottom cover 162. Clamped to the center of this diaphragm by lock nuts 164 is a valve rod 166 slidably mounted in the lower cover 162 and positioned so that when raised its upper end will displace the valve 130, as shown in Fig. 4, and allow latex to flow from the tank to the nozzle. When the rod 166 is allowed to drop, the spring 154 will close the valve 130 and stop the flow of latex. Inasmuch as no latex comes in contact with the sliding joint between the rod 166 and the cover 162, this may be kept lubricated and will not be subject to danger of sticking or freezing. To lift the valve rod 166 there is provided a pusher rod 168 connected to a short crank arm 170 (Fig. l) secured to the pivot 172 of the bell crank 52 which is operated by the treadle rod 50. Thus, when the operator depresses the treadle rod 50 against the tension of the spring 51, lifting the lower feed roll 24 into contact with the work, he also moves up the pusher rod 168 and opens the valve 130. Upward movement of the rod flexes the diaphragm 160, reducing the size of the compartment 138 and tending to start the flow of latex from the nozzle 100. It will also be noted that the dropping action of the valve rod 166 when the treadle is released allows the diaphragm 160 to move back to normal position under the tension of the spring 154 and this creates a slight suction which draws back from the outlet end of the nozzle 100 any small quantity of latex which may be found therein, thus overcoming any tendency of the nozzle to drip.

In the event, however, that the operator does not release the treadle rod 50 as soon as a piece of work has been passed through the machine,

some latex may be delivered upon the under feed roll 24 which would soil the next piece of work to be inserted in the machine. scraper 174 has been mounted on a bracket 176 secured to the arm20 and this scraper is posi tioned to remove'from the upgoing side of the continuously rotating feed roll 24 any latex deposited thereon. This latex which is, scraped off is received in a cup 178 also supported from the bracket 176 and provided with on outlet 180 to which is connected a drain hose 182. a

In the use of themachine, a piece of work 64 will be positioned between the feed rolls and against the surface of the edge gage 66, whereupon the operator will depress the treadle 'rod 50 raising the lower feed roll 24 into contact with the work to grip the same between the upper and lower feed rolls. At the same time:

ribbon-like stream at the outlet of the nozzle and spread along thework by the rounded heel- Accordingly, a-

like portion 122 of the nozzle. A slight yielding of the lower feed "roll 24 is allowed by the spring 62, as in the Cosgrove patent mentioned, and in case the outer flange '72 encounters a thickened portion such as the junior 86 it may be vertically displaced, compressing the rubber plugs 82, and yet maintained in firm contact with the work without disturbing the relation of the other flange to the work. This flange 70 will grip the portion 87 of uniform thickness just below this junior 86. When the operator releases the treadle rod, the lower feed roll will be dropped, allowing the work to be removed, the flow of latex will be stopped, and a suction will be produced to draw back into. the nozzle any fluid contained 4 therein.

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

1. In a cementing machine, coacting workfeeding rolls one of which is recessed, and means positioned in said recess for applying coating material tothe work substantially at the bite of the rolls. I a

2. In a cementing machine, coacting feed rolls one of which has a single, continuous peripheral groove bounded laterally by side flanges sharpened to indent the surface to be coated, and means positioned closely adjacent to said flanged roll for applying coating material to the work substantially at the bite 'of the rolls.

3. In a cementing machine, coacting feed rolls the upper of which is recessed and is provided with a rather sharpflange thereby to indent the surface of the work to be coated, and means positioned in said recess for applying coating material to the work substantially at the bite of the rolls. 4

4. In acementing machine, coacting feed rolls; the upper of which is recessedthereby providing .lateral flanges, and anozzle positioned within the recess'of the upper roll substantially at the bite of the rolls, said flanges adjacent to the nozzle serving as dams for preventing lateral spread of the cement and to indent the work thereby to avoid any tendency of the cement to spread by capillary action.

5. In a cementing machine, work-feeding means, and an applying nozzle having an outlet slightly in advance of said feeding means, said nozzle having a heel-like under portion contacting with thework and positioned -to spread the coating material applied thereby. v

6. In a cementing machine, an applying nozzle provided with a restricted passage for cement opening into a ribbon-like expanded outlet passage the plane-of one of the broad faces of which forms an acute angle with a piece of work presented to the nozzle, and means for supporting the work in a predetermined relation to the nozzle.

7. In a cementing machine, an applying nozzle provided with a restricted passage for cement opening into a ribbon-like expanded outlet passage the plane of one of the broad faces of which forms an acute angle with a piece of work presented to the nozzle and with the restricted passage, and means for supporting the work in a predetermined relation to the nozzle.

8. In a cementing machine, an applying nozzle provided with a restricted passage for cement communicating with an outlet portion expanded to substantially the width of the stripe of cement which it is desired to apply, and a displaceable cover for said expanded outlet portion, thereby permitting cleaning of the expanded outlet and the end of the passage.

9. In a cementing machine, work-feeding means, a cement nozzle having an outlet portion and a spreading portion, said outlet portion delivering cement to the work in advance of the spreading portion, and means for adjusting the relation of the spreading portion to the work.

10. In a cementing machine, an applying nozzle provided with a restricted longitudinal passage, the outlet' of the nozzle being expanded 'to deliver the stream of cement emerging from the passage in the form of a ribbon, the marginal portions of said nozzle bearing on the work at each side of said passage, and means for forcing cement through said passage.

11. In a cementing machine, coacting feed rolls one of which has spaced flanges, an applying device interposed between said flanges,'and means for resiliently supporting one of said flanges thereby to compensate for variations in the, thickness of the work.

12. In a cementing machine, a feed roll provided with spaced flanges one of which is removable, an applying device interposed between said flanges, and operator-controlled means for releasably holding the removable flange in position thereby to facilitate access to the applying device.

13. In a cementing machine, a feed roll having spaced flanges the outer of which is removmeans for releasably holding the outer flange in position on the roll, thereby rendering the outlet of the nozzle easily accessible for cleaning.

portion adapted to be secured to the driven shaft, said body portion being provided with a work-contacting flange, another work-contacting flange yieldably mounted on said roll, and yieldable means interposed directly between said yieldably mounted flange and said body portion thereby to allow radialyielding movement of the flange.

18. In a cementing machine, cement-applying means, a driven shaft, a feed roll having a body portion adapted to be secured to the driven shaft, said body portion being provided with an inner work-contacting flange, a removable work-contacting flange spaced from the inner flange, resilient means interposed between said removable flange and the body portion to allow radial yielding movement of the removable flange, and

' and adapted to be positioned on said projection,

resilient means interposed between said removable member and the body portion to allow radial yielding movement of the removable member, and displaceable means for holding said resilient means and said removable member on the body portion.

20. In a cementing machine, a receptacle for cement, a nozzle for applying cement to the upper side of the work, connections between said receptacle and said nozzle comprising a valve, work-feeding means including a roll contacting with the upper side of the work and a displaceable element contacting with the under side of the work, and operator-controlled means for substantially simultaneously bringing said displaceable element into coacting relation to the work and opening said valve to permit the delivery of cement through the nozzle.

21. In a cementing machine, superposed rolls, a depressible lever for supporting the lower feed roll, a nozzle positioned adjacent to said rolls, a supply receptacle, connections between said receptacle and the nozzle including a valve, and operator controlled means for lifting the lower feed roll into engagement with the work and opening the valve.

22. In a cementing machine, superposed feed rolls, an applying nozzle positioned adjacent to the bite of said rolls, and means for cleaning the supporting roll comprising a cup-shaped receptacle underlying the roll, a scraper associated with the roll within said receptacle, and a drain connected to the receptacle.

23. In a cementing machine, superposed feed rolls, the upper feed roll being provided with a peripheral groove, a pivotally mounted nozzle having a delivery end positioned in said groove,

a spring for holding said delivery end in coacting relation to the work, and a stop screw for determining said relation.

BERNriZmDT JORGENSEN.

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