US2268420A - Machine for applying marginal coatings to articles - Google Patents

Description

Dec. 30, 1941. H. R. POLLEYS MACHINE FOR APPLYING MARGINAL COATINGS TO ARTICLES Filed July 27, 1940 5 Sheets-Sheet 1 Ear-'- 1 I N V EN TOR. $55567- ,e P044270 BYMz W A TTORNEY Dec. 30, 1941. H. R. POLLEYS MACHINE FORAA-PPLYING MARGINAL COATINGS TO ARTICLES Filed July 27, 1940 5 Sheets-Sheet 2 I N V EN TOR. haezrer e PCZLf/J ATTORNEY Dec. 30, 1941.

H. R. POLLEYS MACHINE FOR APPLYING MARGINAL COATINGS IO ARTICLES Filed July 27, 1940 5 Sheets-Sheet 3 A TTURNEY 1941. H. R. POLLEYS MACHINE FOR APPLYING MARGINAL COATINGS TO ARTICLES Filed July 27, 1940 5 Sheets-Sheet 4 IN V EN 70R.

LET-r 6' $25567 ,e PUALf/J ATTORNEY 1941- H. R. POLLEYS 2,268,420

MACHINE ron' APPLYING MARGINAL coA-Tmes T0 ARTICLES Filed July 27. 1940 5 Sheets-Sheet 5 INVENTOR. $545727- 2 Rsufim Patented Dec. 30, 1941 MACHINE FOR APPLYING MARGINAL COATINGS TO ARTICLES Herbert R. Polleys, New Haven, Conn., assignor to United States Rubber Company, New York, N. Y., a corporation of New Jersey Application July 27, 1940, Serial N 0. 347,909

6 Claims.

This invention relates to a machine for applying a liquid coating to the lower margin of an article. The invention relates particularly to a machine for applying an adhesive coating of latex to the lower margin ofa shoe by which the foxing strip is adhered to the shoe.

Heretofore marginal coatings have been applied to articles by brushing it on. The brushes do not apply a sufllciently heavy coating for some purposes and where the coating material is gummy, as in the case of a latex adhesive, the brushes, as well as other parts of the machine coming in contact with the coating must be cleaned from time to time whenever the operation of the machine is stopped for an appreciable length of time. These cleaning operations require considerable time, particularly when the parts of the machine coming in contact with the coating liquid are inaccessible.

In accordance with the present invention the coating liquid is flowed upon the margin of the article to be coated, and in this way the heavier coating is applied, and the operation of cleaning the brushes formerly used is eliminated. Where the machine is used for applying an adhesive coating of latex to the lower margin a shoe for adhering the foxing strip thereto, an excess quantity of latex is flowed on the margin and it runs of! onto a support where it is transferred to the bottom of the shoe for adhering the sole thereto. In order that the machine may be easily cleaned some of the parts are either movable out of their operating position or removable so that they can be cleaned and other parts are made accessible for cleaning.

Other advantages and important features of the invention will be more clearly understood by referring to the following description and the accompanying drawings, in which:

Fig. 1 is a side elevational view of a machine embodying the invention, and showing the machine in its operating position with some of the parts broken away for the purpose of disclosing the interior mechanism:

Fig. 2 isa plan view 01: broken away;

Fig. 3 is an elevational view of the machine showing it in its non-operating position with parts moved to positions for cleaning and for replenishing the coating liquid supply;

Fig. 4 is a detail plan view of the station where the coating liquid is flowed upon the article;

Fig. 5 is a cross-sectional view of the liquid coating supply and applying mechanisms taken onllne 5-5 of Fig. 4;

the machin with parts Fig. 6 is a cross-sectional view of the liquid coating supply and applying mechanisms taken on line 6-6 of Fig. 2;

Fig. 7 is a side elevational view of the liquid coating applying mechanism showing the operation of applying a marginal coating to the lower edge, or fixing margin of a shoe in which the coating is being applied to the side of the shoe; and

Fig. 8 is a side elevational view of the liquid coating applying mechanism showing the operation of applying a marginal coating to the lower edge, or foxing margin of a shoe in which the coating is being applied to the heel portion.

This invention is illustrated in reference to a machine for applying an adhesive coating of latex to the bottom edges of shoes for the purpose of adhering a rubber foxing strip to the shoe, along the coated margin. In this operation it is important to apply a relatively thick coating to the shoe so that the width of the coated margin will be substantially uniform and the top edge will be sharp and well defined to give th shoe a neat appearance.

Referring particularly to Figs. 5, 6, 7 and 8, a liquid latex adhesive coating material I0 is conveyed from a tank II by a rotating drum l2 to a downwardly inclined trough l3 which discharges the latex from its discharge end 14 upon the margin 15 of the shoe Hi to which the foxing strip is to be applied. The shoe I6 is supported by a plate ll having a relatively small projection l8 adjacent to the discharge orifice I 4 and an elevated portion l9 which is adapted to support the toe and ball portion 20 of the bottom of the shoe in certain positions as the lower edge of the shoe is turned around on the projection l8 in front of the discharge end M as the coating is flowed'upon its margin. A rotatable disc 2| having an extended lip 22 is positioned above the trough I 3 and travels along the upper edge of the marginal coating IS in a clockwise direction as indicated by the arrow so as to control the upward splash of the coating fluid and produce a well defined, smooth upper edge 23 on the marginal coating I5.

In order that the width of the marginal coating l5 may be made substantially uniform in the case of an article, such as a shoe having a curved base as at the shank 24, the projection l8 adjacent to the end M of the trough is made relatively small so that it will fit the curve of the shank 24 as this portion of the shoe is rotated over the support It! to apply the marginal coating l5 above that bottom area. The elevated portion I9 is employed to steady the toe or ball portion of the shoe while the marginal coating i6 is applied along the heel area of the shoe and thereby act as a guide and as an aid in maintaining the uniformity of the width of the coating.

It will be understood that an excess amount of coating liquid is flowed upon the margin II in order to insure the relatively thick or heavy coating. Some of the excess liquid flows back into the supply tank I i through an openin in the supporting plate I! and down a spout 26 into the tank. Other portions of the excess coating liquid flows down the supporting plate I! and from the margin ii of the shoe upon the elevated portion I9 and coats the bottom portion of the shoe for the purpose of adhering the sole thereto. As shown in Figs. 1 and 2, the excess coating liquid may flow from the bottom edge 21 of the elevated portion I! of the supporting plate I! into a catch tank 26. In order to remove any excess coating liquid from the bottom of the shoe IS the bottom is wiped across the top of a rubber wiper 23 which is secured by a wing nut 30 to the side of the supporting plate IT. The wiped off coating liquid flows down the wiper into the tank 28.

Referring to Figs. 1 and 2, the rotatable disc 2i and the rotatable drum l2 are driven by a motor 3| on the machine frame F which in turn is supported bv a pedestal P resting on a base, not shown. The drum I2 is driven by a pulley 32 on the motor shaft 33. A belt 34 is driven by the pulley 32 and drives a pulley 35 keyed to a shaft 36 journaled in a gear case 31 secured to the frame F. A gear 38 is keyed to the shaft 36 and drives a larger gear 39 which is keyed to an idler shaft 40 having a gear 4| keyed thereto and driving a gear 42 which is keyed to a shaft 43 to which the drum i2 is keyed.

The rotatable disc 2i is driven from a pulley 44 on the motor shaft 33. A belt 45 is driven by the pulley 44 and drives a pulley 46 (Fig. l) which is keyed to a shaft (not shown) mounted in a gear case 41. The gear case 4! contains reduction gears which are driven from the pulley 46 and drive the meshing beveled gears 48, one of which is keyed to the shaft 49 to which the rotatable disc 2i is secured. A scraper 50 (Figs. 3 and 4) is mounted on the gear case 4'! and its lower end contacts rotatable disc 2i, as more particularly shown in Fig. 4, to keep the upper surface of the disc from collecting batches of coating liquid material thereon, particularly-in the case where latex is used, which tends to coagulate on the surface.

For the purpose of moving the rotatable disc 2| away from the trough l3 and the coating liquid transfer drum [2 so that the trough may be removed and the drum may be made accessi ble for cleaning, the gear casing 41 which carries the disc 2i is mounted upon a base 50' which is pivoted on a pin 5i mounted in the side frames 52 of the machine. As shown in Fig. 3, the disc 2i has been pivoted upwardly about the pin 5| to the cleaning position. The base is locked into its lower operative position, as shown in Fig. l, by a hook 53 which extends underneath a cross pin 54 in the side frame 52. The hook 53 forms one end of and is operated by a lever 55 which is pivotally mounted on a pin 56. The base 50' is provided with an arm 51 which is adapted to strike against a spring abutment 58 to cushion the downward movement of the base 50' and the mechanism carried thereby. The abutment 58 is mounted in one of the side frames 62 and the spring tension on the abutment may be adjusted by the nuts 63 on the threaded stem 60.

Reierringto Fig. 5 the bottom of the trough i3 is cut out so as to permit a portion of the upper periphery of the drum i2 to extend into the opening. The edge 6| of the opening in the trough is resiliently held against the periphery of the drum l2 by a spring pressed arm 62 which cooperates with the upper end of the trough and tends to pivot it about the pin 54 which fits into notches 63 in the sides of the trough. Referring to Fig. 3, the arm 62 is mounted on a shaft 64 oscillatably mounted in the side frames 62. An arm 65 is keyed to the shaft 64 on the outside of the side frames 52 and is pulled downwardly by a tension spring 66 having one end secured to the arm 65 and the other to the frame of the machine. The pressure with which the lower edge H of the trough vis held against the periphery of the drum I2 is controlled by an adjustable set screw 61 mounted in the side frame 62 and having an end cooperating with the outer end of the arm 65. When the rotatable disc'2i has been pivoted upwardly to the position shown in Fig. 3, the trough i3 may be removed from the machine by manually lifting the arm 65, which lowers the arm 62' and permits the notches 63 in the trough i3 to be disengaged from the pin 54. The trough I 3 may then be pulled lengthwise to the left as viewed in Fig. 3, and removed from the front of the machine. a

The coating liquid is supplied to the supply tank ii from a reservoir 63, and. the feed therefrom is so arranged that the liquid level in the supply tank II is maintained at a substantially constant height. The reservoir 68 is made in the form of a bottle, which is pivotally supported by a rod 63 having its lower end pivotally mounted on a pin 10 in the frame F. The reservoir 66 is secured to the rod 63 by an upper socket II and a lower semi-circular support 12. The bottom of the bottle 68 fits into the socket 1i, and it is supported on the shoulder adjacent tothe neck by the support 12. The socket 1i and the support 12 are secured to the rod 69. The socket II is secured with a clamp 13 which is split and fits around the top of the rod 69. A screw 14 is threaded into the end of the rod 69 and its head extends over and prevents the clamp from slipping off the rod. The clamp 13 may be tightened around the rod 69 by a hand, wheel 15 mounted on a pin 16 extending through one sideof the clamp and having its end threaded into the other side of the clamp and adapted to draw the sides together around the rod. A cap'TI is' screwed onto the mouth of the bottle 68, or otherwise secured thereto, and it is provided with an outlet nozzle 16 which is adapted to discharge the coating liquid into an open canal 13 which leads into the supply tank ll shown in Fig. 2.

When the liquid level of the coating liquid, which is always the same in the tank II and the canal 1!, falls below the end of the nozzle I8, the coating liquid flows from the bottle into the supply tank ll until the liquid level rises above the end of the nozzle. The flow from the bottle 68 is then stopped and in this manner the liquid level is maintained substantially constant.

In order to refill the bottle 68, it is pivoted about the pin 10 from the position shown in Fig. 1 to that shown in Fig. 3. The bottle 66 being in its upright position, the cap 11 may be removed and the bottle may be filled. In order to bring the bottle back to the position shown frame.

in Fig. '1, the operator places his finger over the end of the nozzle 18 and then pivots the bottle to its inverted upright position. The operators finger is then removed and the fiow of coating liquid to the canal I9 and tank II is continued as previously described.

The canal I9 is fixed to the supply tank II. The tank II is supported by a vertically movable support 80, and the projecting end of the canal I9 is supported by a bracket 8I secured to the frame of the machine. Referring to Fig. 6, the support 80 is held in its operative position by an arm 82 which is pivoted on the support by a pin 83. The arm 82 in turn is supported by a projection 84 on the frame. The support 80 is provided with a downwardly extending hollow projection 85 which telescopes over an upwardly extending hollow projection 86 attached to the A rod 81 having an operating knob 88 thereon extends through the hollow projection 86 and is threaded into the bottom of the downwardly extending projection 85. The outer projection 85 prevents the gumming up the slidable rod 81 by any overflow of the. coating liquid. The supply tank II and the canal I9 may be removed from the machine by manually grasping the knob 88 and moving the arm 82 to the dotted line position as shown in Fig. 6. After the tank has been lowered below the periphery of the drum a hand wheel 92 which is screw-threaded on a projection 93 extending from the end of the bar 90. The hand wheel 92 is fixed against axial movement and is rotatably mounted on the frame of the machine by a fixed arm 94 which fits into agroove 95 in the hub of the hand wheel, and holds the hub against the frame.

Referring to Figs. 1 and 2, the plate I! for supporting the article I6 whose margin is to be coated may be adjusted up and down to vary the width of the marginal coating I5. Such adjustment is effected by a hand wheel 85 secured to a shaft 91 mounted in 'the frame of the machine and having a pinion98 keyed thereto and meshing with a rack 99 secured to a'slide I00 which in turn is attached to the supporting plate IT. The slide I00 is mounted in dovetailed guideways IIlI formed in the frame of the machine. The rod 91 is provided with a locking mechanism for locking the supporting plate in any position it may be adjusted. The locking mechanism comprises a manually operable nut I02 which is threaded upon the shaft 91 and is adapted to be turned up against an abutment I03 on the frame of the machine so as to lock the shaft 81 and the pinion 88- thereon against rotation by drawing the conical head I04 on the shaft 91 into a similarly shaped socket in the frame.

When the machine is in operation the parts are in theposition shown in Fig. 1. ate the machine the motor is started by the usual switch I05. The motor 3I drives the /coating liquid transfer drum /I2 and delivers the coating liquid to the trough I3 which directs the fiow of the coating fiuid upon the lower margin To operof the shoe I6. The motor also drives the rotatable disc 2| which prevents the coating liquid from splashing upwardly on the shoe. The lip 22 on the edge of the disc produces a sharp even line around the top of the marginal coating as the shoe I6 is manually turned to present the lower margin I5 to the flow of liquid from the discharge end I4 of the trough. In coating the shoe I5, the bottom rests upon the relatively small projection I8 of the supporting plate I'|,-

and is maintained substantially parallel with the supporting plate as it is turned around on the projection I8 in a counterclockwise direction. When the parallel position of the shoe is maintained, the distance the lip 22 contacts with the shoe above its bottom will be substantially constant, and the width of the marginal coating will be constant. As an aid to maintaining such parallelism, the lower elevated portion I9 is provided for the toe portion of the bottom of the shoe to rest upon. Due to the fact that the support I8 is relatively small, it is adapted to fit into the curvature of the shank of the bottom of the shoe and maintain the point of contact of the lip 22 a substantially constant distance above the bottom of the shoe in that locality. I

It will be understood that where the machine is to be used for applying marginal coatings of adhesive to shoes havinga fiat bottom and no arch at the shank 24, a flat supporting plate I! may be used, and the raised portions I8 and I9 may be eliminated.

When it is desired to discontinue the operation of the machine, the marking disc 2| may be moved into its upper position, and the bottle reservoir 68 may be moved into its lower position as shown in Fig. 3 to permit the coating liquid conveying trough I3, supply tank II and the attached canal 19, to be removed and cleaned as previously described. The supporting plate I I with its supporting slide I00 may be removed by releasing the locking nut I02 and pulling the slide upwardly out of the guides IOI. When such parts are removed the drum I2 is accessible for cleaning.

While the details of this invention have been described, it is understood that they may be changed or modified without departing from the spirit of the invention, and it is desired to protect the invention within the scope of the claims appended hereto.

Having thus described my invention, what I claim and desire to protect by Letters Patent is:

' 1. In a machine for applying liquid coating to the lower-margin of an article, a trough inclined downwardly towards its discharge end for conveying the coating liquidand discharging it upon the margin to be coated, a support for the article adjacent to the discharge end of said trough, a

rotatable disc above the discharge end of said trough for forming a smooth top edge on the marginal coating, a tank for coating liquid, a drum rotatable about a horizontal axis and having its lower periphery positioned to contact with -'liquid in said tank and its upper periphery adapted to discharge coating liquid therefrom into said trough, means for returning the excess coating liquid to said tank, and means for maintaining the liquid level in said tank at a substantially constant level. 2. ,In a machine for applying liquid coating to y the lower margin of an article, a trough inclined downwardly towards its discharge end for conveying th/e .coating liquid and discharging it upon the margin to be coated, a drum having its lower periphery adapted to rotate in a bath of the coating liquid, said trough having the upper edge of its bottom resting upon the upper periphery of said drum and inclined upwardly against the direction of rotation of the surface of said drum contacting therewith, means for resiliently holding said upper edge against said drum, and means for operating said holding means to permit the removal of said trough.

3. In a machine for applying liquid coating to the lower margin of an article, a trough inclined downwardly towards its discharge end for conveying the coating fluid and discharging it upon the margin to be coated, a tank for the coating liquid, a drum having its lower periphery adapted to rotate in contact with the coating liquid and discharge the coating liquid from its upper periphery into said trough, a'projection extending upwardly from the receiving end of said trough and fulcrumed intermediate its ends on a bar seated in an upwardly opening socket in said projection, a manually operable support for the upper end of said projection adapted to normally hold said socket on said bar and said receiving end on the periphery of said drum, and means for manually operating said support so that said trough can be-lowered and removed.

4. In a machine for applying liquid coating to the lower margin of an article, a tank for holding the coating liquid, a drum rotatable about a horizontal axis and having its lower periphery adapted to rotate in contact with the coating liquid in said tank, a trough inclined downwardly towards its discharge end for conveying the coating fluid and discharging it upon the margin of the article, said trough having its upper end arranged to scoop the coating fluid from the periphery oi the drum into said trough, a rotatable disc above the discharge end of said trough for limiting the height of the marginal coating applied to the article, means for moving said disc upwardly away from said trough, means for removing said trough from said machine, and means for removing said tank so that said disc. trough, tank and drum are made accessible for cleaning.

5. In a machine for applying liquid coating to the lower margin of an article, a trough inclined downwardly towards its discharge end for conveying the coating liquid and discharging it upon the margin to be coated, a drum below said trough and adapted to rotate in contact with a coating liquid bath and transfer the liquid to said trough, a rotatable disc above said trough for forming a smooth top edge on the marginal coating, said disc being driven by a shaft extending downwardly from above said disc, and

means for pivotally moving said disc upwardly away from said trough so that the trough may be removed and said drum be made accessible for cleaning.

6. In a machine for applying a coating of adhesive around the foxing margin of a shoe having an arched shank, a support for the ,bottom' HERBERT R. POLLEYS.

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