US2539988A - Machine for applying substances on irregular shape articles - Google Patents

Description

I. CALLES ET AL MACHINE FOR APPLYING SUBSTANCES 0N IRREGULAR SHAPE ARTICLES Jan. 30, 1951 Filed July 20, 1949 2 Sheets-Sheet l INVENTORS 1's flnc Cannes J9C'o2303uanT/N5 K) I d. H GE/vrs Jan. 30, 1951 l. CALLES ET AL 2,539,983

MACHINE FOR APPLYING SUBSTANCES 0N IRREGULAR SHAPE ARTICLES Filed July 20, 1949 2 Sheets-Sheet 2 my, XML/ye.

flab-Hrs Patented Jan. 30, 1951 MACHINE FOR APPLYING'ISUBSTANCES' ON 'IRREGULARSHAPE ARTICLES Isaac Calles 'an'd J acobo Bucatin'sky, Buenos Aires, Argentina Application July 20, 1949,Serial?No.105,806 In Argentina June 9, 1949 2 Claims. i1

This invention "relates to machines for applying substances on Iirregular articles, :and :more particularly to :a coating device for providing cement or liquid forsjoiningtrubber soles lto footwear in general.

The rubber industry?ha'-s found an important field'in the manufacture of lfootwearyand particularly of footwear "vulcanized together with the uppers. This typeoffshoe, and particularly the type referred to as Champicnfsisstill made practically "by hand, -;as after "it is assembled on the last, brushesarei used for applyingthe cement which should cover the sole portion and a portion'of the sides,sufi1cient for'adhering the welt as a side element-and as. an intermediarybetween the uppers and the sole.

This manual operation'not only represents a considerable delay inthe general process but also requiresskilled laborjinasmuchas thes'troke of the brush onthe side should take place within a given 'limit so that it :will'correspondto' the application of the Welt.

Some manufacturers have attempted to make this a mechanical :operation :by the dipping method, i.e., by dipping the assembled upper into a receptacle containing liquid cement, up to the level corresponding to the limit of the welt. While having some advantages, however, this operation is-incomplete due tothe fact that the cement does not -always-adhere easily'be tween thefolds of the uppers, and due-to the particular shape of the article, the level line cannot be obtained in certain zones and "particularly at the zone of the --.cap, aroh,-etc. This-requires a manual touch which renders the mechanical operation ineffective to a certain degree.

Taking into consideration the drawbacks mentioned above, this invention contemplates the use of a coating-:element constituted by a. rubber sponge pad of suchresiliency and softness that when impregnated with cement and on being pressed by the "shoe being'inanufactured, the latter will receive the adhesive substance as a result of the shape of the sponge.

The machine is so combined thatit will operate continuously. For this purpose, the machine comprises mainly a roller acting partly immersed in .afeeding container, said roller =being-mounted in an oscillating manner but -urged towards its raised position "by means of -a counterweight The rolleris thus in position .for receiving the footwear guided along a given-line at a level lower than'that of the roller surface, so that it will press into the roller so as to cement the sides as Well as the underside or sole portion. However, sincethe cap portion could receive an excessive coating it it would suddenly strike the rollerupon' 'being directed in a secan't line relative to "the periphery of -saidiroller, said oscillating mounting is provided with stops combined with shoes #on the footwear-"holder whereby it is possibleto regulate-the height-of the roller in order that the initial contact with -the footwear will be substantially tangential, whereupon -it will-befreeurfder -the aticn o'f thecounterweight ior -the i rilaying which w-illfacilitate the cementing operation. Theeapparatus is thus i donditioned automatically and a sin 'gle massage at a certain speed will be su'i'licien t to 'carry out the stepof applying cement or'othe'r liquid substance in the manufacture of footwear.

In order that-the inv'ention maybe moreaclearly understood an d readily carried into practice, same has' been illustrated by way of example and 'in-a preferred embodimentin the 'accompanying drawings, wherein:

Fig. l isa si'de viewo'fthe-machine,-showing the roller-pad partly'immersed in the 'lio uid'to be applied and which ischarg'ed by virtue of its own rotation upon receiving the "Work, asshown by the arrows;

"Fig. 2 is an end view of part'ofthemac'hine showing *the roller-pad assembly when not in contact with ashoe; I

Fig. 3illustrates the 'manner'in whichthe'lower portion of a shoe is "passed over the roller the resilient "material of which is compressed and adapted against the'sides, thereby applying the cement contained in'th'esp'onge pores.

Thesame. reference characters are used to indicate like or corresponding .parts or elements throughoutithe drawings.

As shown-in the drawings, a indicatesthe supportingframe :of the machine having a lever I) mounted on 'a pin vI. The arm -,2 of =lever-b has a fork ,portionthe two arms of which carry a pair of bearings 3 in which are-suspendedthe studs 4 of a co-ntainerfi. -Above said bearings -3 there is provided a further pair of bearings .-6 adapted 'for receiving thestuds lot a roller 6, formed by a spongy pad. The opp'ositearm B of .lever'b carries a'counter weight B hanging from perforations I ll forming a scale forgraduating the action thereof. Said counterweight 9 will hold the where in raised position, and as Shown in Fig. 1, the movement of lever b due to the action or said counterweight 9 is limitedby means of a stop H which is adjustable so 'as to define the maximum position capable of being assumed by 3 roller c; this position is that shown in full lines in Fig. l and that corresponding to Fig. 2.

Associated with said supporting frame a there is provided a guide [2 along which a carriage (Z is arranged to slide, moved by any suitable means. Said carriage 11 carries a support 13 to which the last l5 for the footwear e being manufactured is secured by means of a fitting l4.

Said carriage d carries a set of shoes I5 and I! which by means of screws l8 and I9 are arranged in guides 20 and 2| with the required relative spacing depending on the dimensions of the footwear e, as said shoes 16 are intended to regulate the position of roller c with respect to the sole portion of footwear e, so that the cap and heel portions will not receive more cement than that corresponding to the limit line indicated at. 22.

For this purpose, the shoes 16 and I! register with a stop 23 which by means of a guide 24 is secured by a thumb screw 25 to the arm 2 of lever 17. This stop 23 is vertically adjustable and serves for determining the extent of the downward movement of roller 0, so that the footwear 6 will engage same in a more tangential manner than that corresponding to the secant lineindicated in Fig. 1. Such downward movement is caused by shoes 16 and 11. Shoe [5 will cause the temporary lowering of roller at the time the cap portion arrives thereat, while shoe ll will lower said roller at the time the sole portion or underside has completed the passage thereover.

Said roller 0 is formed by a highly resilient and soft rubber pad, so as to be capable of conforming to the shape of the sides when the footwear e is passed over the periphery thereof. Following the secant line indicated by the reference numeral 26, the footwear firmly mounted on the carriage d is caused to overcome the material of roller c by compression. Thus, said roller c impregnated with cement or other liquid contained in container will stamp the cement onto the underside and sides of footwear e, so that the liquid will be evenly applied both to the sole portion and to the sides up to the line 22.

Inasmuch as said container 5 is hanging by stud 4 from the forked end of arm 2, it will be able to assume any position without losing its verticality, whereby the liquid will be properly con" tained therein. The level of the liquid in container 5 should be sufficient for the roller 0 to remain partly immersed, so as to impregnate same for transfer to the footwear e.

Operation With a suitable amount of liquid cement in container 5 and with stops I l and 22 properly adjusted, the machine will be ready to operate with a given footwear of a certain size, for which purpose the position of shoes l6 and l! is adjusted relative to the cap and heel of the footwear.

As is customary, the uppers 21 are assembled against an insole on the last I5 which is fixed to support l3 of carriage d by means of fitting or mount member l4. 7

When the carriage d is moved forward in the direction of the arrows and the cap portion of the footwear is about to engage said roller 0, the shoe l8 will act on stop 23 and cause a slight downward movement of arm 2 of lever b, whereby the roller 0 will move downwardly as shown in dotted lines in Fig. 1, sufficiently for the lower portion of the footwear to enter tangentially relative to the maximum circle of roller 0, and

4 inasmuch as shoe l6 has a given length proportional to the size of roller 0, when the forward end of the footwear 6 reaches the plane indicated by the reference numeral 28, said stop 23 will be released from shoe I6, leaving the lever b free so that through the action of counterweight 9 it will tend to assume the position shown in full lines in Fig. 1. Thus, the pad formed by roller 0 will press against the underside of the footwear and also against the lower portion of the sides, up to the line 22, as the carriage d continues to move forward. Upon reaching the rear portion of the footwear, just before the latter leaves the roller 0, the shoe I! will strike stop 23 causing the downward movement of the entire lever b and roller 0, so that there will be no irregularity in the application of cement at the heel or rear portion of the footwear.

After the welt has been applied and fixed, the footwear may be passed through a similar apparatus charged with a suitable solvent for refreshing the cement and facilitating the immediate adhesion of the sole, which should also be fixed ready for the vulcanizing step.

It should be understood that while the machine has been described and illustrated in connection with the manufacture of footwear, it is also applicable to other irregular shaped articles requiring the application of any liquid or semiliquid substance.

It is evident that in carrying the invention into practice, several modifications, changes and a1- terations will occur to those skilled in the art, without departing from the scope of the invention as clearly set forth in the appended claims.

We claim:

1. A machine for applying substances on irregular shape articles, which comprises a roller formed by a pad associated with a liquid feeding container, said roller together with said con tainer being mounted on the forked end of a lever having a fulcrum and provided with a counterweight heavier than the assembly of said roller and container, said lever having a limiting stop determining the maximum raised position of said roller.

2. A machine for applying substances on irregular shape articles, which comprises a roller formed by a resilient pad associated with a liquid feeding container and mounted on the forked end of a lever provided with a counterweight heavier than the assembly of said roller and said container, said lever having at least one stop, a carriage. shoes carried by said carriage in the path of said stop, said carriage having means for supporting said article and being movable on a guide parallel to a line passing as a secant line by said roller.

ISAAC CALLES.

JACOBO BUCATINSKY.

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

UNITED STATES PATENTS Number Name Date 1,654,214 Evans Dec. 2'7, 1927 2,094,658 Keith Oct. 5, 1937 2,108,674 Keith Feb. 15, 1938 2,114,453 Osgood Apr. 19, 1938 2,198,638 Standish Apr. 30, 1940

Images