US2054822A - Cementing machine - Google Patents

Description

Sept. 22, 1936. l, L KEITH 2,054,822

GEMENTING MACHINE y Filed March 30, 1952 5 Sheets-Sheet l 26 /lnlm .m52 i i I' .L/ i l l Y` I Il i '70 I v I f I g I l I l .l lll ,Ulu ugn. l

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l. L.. KEITH l2,054,822-

I CEMENTING MACHINE I Y Filed March 30, 1952 3 Sheets-Sheet 2 sept. 22, 1936.l

Patented Sept. 22, QS

`UNITED sTA'rEs rATaNT oFFlcE 6 Claims.

This invention relates to cementing machines which are primarily designed for use in connecy tion with the manufacture of shoes, more particularly for the purpose of adhesively connecting 5. cloth doublers to the inner sides of shoe uppers,

and for cementing sock linings and soles in position.

Prior to my present inventionrmachine's of the vertically movable grid type, illustrated in McMurray Patent No. 1,298,147 have been` extensively used for these purposes. One of the chief objections to a machine of this type, the grid of which is provided with teeth which apply liquid adhesive to the material in small dots or patches, is that the cement applying teeth are likely to cause impressions or unevenness in the material,

While, theoretically, some of these objections would be avoided by the construction of my prior Patent No. 1,242,561 of October 9th 1917, in actual practice the construction therein disclosed has certain vital defects which nullify the advantages which might otherwise be secured, so that the construction is not usable practically.

cementing operations performed by the several types of machines above referred to. Y Y

More specifically, the objects of my invention are to provide a machine which may be satisfactorily employed for cementing cloth doublers to leather shoe uppers, which will accomplish this result without causing uneveness of the surface of the leather, also, to provide a machine which is adapted to perform the operation of cementing soles and sock linings in the manner disclosed in said patent to Bowlen, without employing a cementing grid.

Other objects are to provide a machine of the aboveY described character which is adaptedto 'In the patent to Bowlen No. 1,814,430 of July" 14, 1931, and in my Patent No. 1,856,562 dated perform more satisfactorily the different kinds of Y be power driven, so that the operator will be relieved of the work kof operating a treadle, as is usually necessary in the grid type vof machine, but which will at the same time obviate kthe defectsof the construction of my said prior Patent No. 1,242,561, and to provide a machine which v5 will enable the operator to perform cementing operations of the kind above referred tol more rapidly than has been possible with machines of the grid type.

I accomplish these objects by providing a 10 applied in dots, stripes, or patches, in any desired 15 arrangement, by means of a roll having a suitably indented surface forming projecting teeth, or ribs, to the tops of which a thin film of adhesive is applied by a smooth-surfaced roll, to which a thin coating of a suitable adhesive has been 2O applied, the transfer of the adhesive from the tops of said teeth or ribs to the belt being accomplished by deflecting the latterinto contact therewith from a position in which they are normally held out of contact, so that the amount of 25 i adhesive transferred Vand subsequently applied may be accurately varied and controlled. Also by providing the indented roll with a plurality of corresponding surface formations, each of which consists of a series of adhesive applying projec- 3u tions, corresponding preferably tothe grid arrangementshown in said patent to Bowlen, for applying-adhesive to-different portions of a` sole, or sock lining-according to certain predetermined requirements of said portions, said formations be- 35' ing so arranged relatively that the corresponding applications of adhesive tothe belt, on its work i receiving portion, are presented successively, so

that the belt may be operated at a slow speed and several soles or linings may be cemented while the belt is being moved a distance corresponding to the length of the sole.

For a more complete disclosure of the invention reference is now made to the following specification, in connection with the accompanying drawings, in which: *Y

Fig. lis a top plan view of a machine embodying my invention. v

FigQZ is a sectional view at line 2-2 of Fig.' 1. 50 Fig. 3 is a view in elevation of one end of the machine.

Fig. 4 is a detail view `of the driving mechanism. Fig. 5 is a detail sectional View of the cementing apparatus. 55

Fig. 6 is a plan View of the peripheral surface, unrolled, of the cement applying roll.

Fig. 7 is a sectional view of a portion thereof adjacent the surface.

Fig. 8 is a detail perspective View of a. bearing for the belt.

Fig. 9 is a detail perspective View of a cement roll bearing.

Fig` 10 is a view indicating a type of work which may be performed by the machine.

As shown in the drawings, the frame of the machine is preferably made in the form of a table having a horizontal top I6, which is supported by legs II.

The operating mechanism is principally located beneath the top, and between the legs and is driven by an electric motor I2 mounted near the bottom of the frame. A shaft I4 is driven by a belt from the motor thru a pulley I5, said shaft having a Worm gear I6, Which is meshed with a gear Il on a horizontal shaft IS, mounted in suitable bearings on the frame. A gear I9, on shaft I8, is meshed with a gear 26, on a roll shaft 2|, and a gear 22, on shaft 2|, is meshed with a gear 23, of the same size as gear 22, on a roll shaft 24 directly thereover. The gear I9 is also meshed with a gear 25 on a pulley shaft 25, directly over shaft I8. l

A pair of hanger rods 21, 28 are rigidly mounted on the underside of the top I0 and depend vertically therefrom and the shaft 24 is mounted in bearings 30, (one of which is shown in detail in Fig. 9,) which are in turn mounted for adjustment on the hanger rods 2T, 28. A pair of bearings 32, similar to bearings 36, are also mounted on said rods and the roll shaft 2| is journaled therein. A smooth surfaced cylindrical roll 34 is mounted on shaft 2| between said bearings and a pan 35 for liquid adhesive is mounted on a shelf 36, the

Ylatter being supported on brackets 3l mounted on the rods 2l, 28, and being arranged to be raised and lowered thereon by means of a shaft 38 mounted in bearings 39, also supported on the rods 2l, 28, said shaft having a handle 4I) and arms 4I arranged to engage the under side of the shelf, to raise and lower the same, so that the roll 34 may be partly submerged in the liquid in the pan 35, or the pan may be lowered, so that its top edge is below the level of the lowest portion of the roll 34, permitting ready remo-val of the pan for cleaning and other puposes.

Each bearing 32 is provided with a post 42, on each of which a sleeve 44 (Fig. 2) is slidably mounted, and a coil spring 45 is arranged on each post 42 between each sleeve and the bearing. 32,

each sleeve being held against the corresponding spring by a nut 46 threaded on the end portion of the post 42. A rod 48 is mounted in the sleeves 42 above the posts 42 and a holder 49 is mounted on said rod and has a fiat blade, or doctor56 secured thereto on a flat surface thereof, in position to extend into close proximity at its edge to the surface of the roll 34. The rod 48 is extended be yond the sleeve 42 at one end and a coil spring 52 is mounted thereon between the sleeve 42 and a collar 53 on the rod. A pin 54 in the rod 4 8 is held in a notch in the opposite side of sleeve 42 from the spring 52, to form a friction lock to hold the doctor 56 in operative relation to the roll 34. A handle 55 is provided in the holder 49, by means of which the doctor may be lifted out of operative position.

A roll 56 is mounted on the shaft 24 with its surface in rolling contact with the roll 34. The formation of the surface of roll 56 may be varied,

and different formations will beremployed for the different kinds of work which the machine is designed to perform.

For all classes of work which the machine is designed to perfo-rm the surface of the roll will be broken by various grooves, which extend both circularly and longitudinally thereof, so as to make the surface discontinuous and to provide the roll with a series of short fingers, ribs or bars the ends or tops of which fo-rm faces which are separated from each other and lie in a cylindrical surface, which, as a matter of convenience in design, is of same diameter as that of roll 34.

A pulley 66 is mounted on the shaft 26, and a similar pulley 52 is mounted on a shaft 53 in parallel relation to, and at the same level as the shaft 26. The shafts 25 and 63 are mounted in bearing brackets 59, 65, respectively secured tothe under side of the top I6, and a smooth surfaced belt lil, preferably of leather, 1s extended about said pulleys 66, 62.

The top ii) is cut away above the belt and the arrangement is such that the belt is driven horizontally at ,approximately the level of the upper surface of the top |6.

Any suitable means may be provided for placing the belt under tension, so that it will not sag, and will run horizontally between the pulleys, the means shown comprising abjustable bearing blocks 72, in the brackets 65, said `blocks having screw threaded rods 'I3 connected thereto which extend through the frame and are engaged by nuts 14.

A holder is pivotally mounted in arms '|55 secured to brackets 65, and a cleaning knife or scraper 'I3 is mounted on said holder with its edge in engagement with the belt '16, at a point slightly abo-ve the level of the axis of shaft 63. A spring Il acts to press the edge of the knife. against the belt, and a handle 'I9 is connected to the holder l5, to permit the knife to be swung out o f contact with the belt for cleaning purposes. When held in normal position the knife 'I8 will remove practically all adhesive which may be left on the. belt, and as the knife inclines downwardly from its edge, provides a trough which is arranged to discharge into a second trough 8|), extending from the lower end thereof to the pan 35, as shown in Figs. 2 and 8.

A metal, belt-deflecting roll 32 is rotatably ,-f'

mounted in the ends of a pair of arms 83, directly over the roll 56 and in position to engage the inner side of belt '16, said arms being pivotally supported at their opposite ends in brackets 84 mounted on the under side of the. frame top, and adjusting screws 85 being arranged in similarly supported brackets 8G, to engage the undersides of said arms and vary the pressure which may be applied to the inner side of the belt by the weight of roll 82.

The roll 56 and the pulleys which carry the belt I0 are so arranged relatively that the belt moves directly o-ver and in close proximity to the surface of the roll, but Without actually touching it, as it moves along the lower portion "1 of its travel.V When, however, the weight of the roll 82 is permitted to bear on the belt with sumcient force, the belt will be deflected into Contact with the roll 56.

When the machine is operated, the belt travels fromleft to right at Vthe surface of the top I6 and the roll 56 travels in the direction in which the belt travels at their points of contact, as indicated by the arrows in Figs. 4 and 5, and all of the contacting surfaces of the rolls 34 and 56 ll, at which point the operator may place the certezzal I and the belt 10 travel at the vsame surface speed j in the same direction at their respective point of contact.

toits surface will be removed by the doctor 55, except a thin film thereof, which will be partly transferred to the faces on the ends or tops of.

the projections, ribs, or lingers of the rollA 56. The adhesive thus deposited will then be transferred to the surface ofthe beltv10. Dotsand stripes of adhesive will thus be applied to the belt and carried thereby to the level of the top article to be cemented at on 'the belt as it travels, so that when the article is removed, v

`f-1contact with the surface to which it is to be adhesively connected, finishing the operation. Surplus adhesive, not taken up by the article, will then be removed from the beltby the knife 18, which will flow downv the knife on` to the i-trough and be returned to the pan 35, so that,

when the belt again comes in contact with the roll 56, and the above described operation is repeated, and adhesive will only be applied to the article in a predetermined manner.

As previously indicated, the surface formation Y of the roll 56 will be varied according to the work to be performed. In performing the Work described in said patent to Bowlen in the manner described therein, the particular formation shown in Figs. 6 and 1 will be employed, Fig. 6 being a plan of the surface of the roll 56 as if laid at, or unrolled. As shown, the roll surface is made up of three separate circularly arranged sections of equal width and of a length equal the circumference of the roll, each section comprising a group of cross ribs 90, 9i, 92, a group of circumferentially extending ribs 93, 94, 95, and a group of projecting teeth, or fingers 96, 91, 98. Each group of each section is arranged in staggered relation to the corresponding groups of the other sections, so that each group of any one section is opposite o-r longitudinally aligned with two different groups of the other two sections. As shown, each group is of approximately the same length circumferentially, but this is not essential, the practical essential being that the end of each section be o-ne-third of a circumference from the corresponding ends of the other sections. The three groups of each section are of a length corresponding to the longest sole or sock lining which is to be cemented, the group of crossed ribs corresponding to the heel part, the group of circumferential ribs to the shank and the group of separate projections to the fore part of the sole, or sock lining to be cemented. It will be understood that these lengths in practice will be approximations, as it would ordinarily be impractical to have a section correspond eX- actly to each sole pattern.

With this arrangement, when the machine is operated, the adhesive will be applied to the belt 10 in stripes and dots corresponding to the groups above described, no adhesive being applied by the slotted portions of the roll, so that successive surface portions of the belt will have adhesive applied thereto corresponding to the diagram of Fig. 6. The operator will then place a sole on one of the sections in such a position that the heel part Will rest on the cross barred portion 90, its shank part on the ribbed portion 94 and its forepart on thedotted portion 98, so that adhesive will be appliedV thereto in the manner in -lV dicated in Fig. 10, and will remove it and place it in the position in which it is to be adhesively held. The speed of the belt will be timed to correspond to the time required for this operation,

so that the group 5l will havewadvanced to approximately the position of the group 95 by the time the operator can place the next sole on the belt. These operations will be successively re peated on the ydifferent sections, so that there will be no delay in the operation. y

If cloth doublers are to be cemented, the entire surface of roll 5S will be made up of projec-y tions, or teeth corresponding to those of groups 9S, 91, 98, so that cement will be applied thereto in dots over the entire surface. As the doubler, or leather to which the adhesive is applied is pressed on to a perfectly flat surface, there will be no tendency to cause indentations on the work.v Also the amount of adhesive which is applied may be accurately controlled in two ways, first, by adjusting the doctor 55 so as to vary the thickness of the film of adhesive which will be applied by the roll 35 to the faces of theribs and fingers on the roll 55, and, second, by varying the force of engagement of the belt with said faces by means of the roll 82. The adjustment will ordinarily be such that the belt is not forced into actual contact with said faces, as they are separated by the film of adhesive.

The particular means employed for applying the adhesive to the belt is important for several reasons. For example, if the roll 34 were omitted and the roll 56 employed to transfer the adhesive directly from the cement pan to the belt, the adhesive would become suspended between adjacent projections, so that it would be applied to the belt opposite the recesses in the roll, in addition to what would be applied by the faces of the projections.

With the above described machine the operations which have previously been performed by the vertically movable grids is greatly facilitated and the physical effort required by the operators, who are usually women, is greatly reduced.

I claim:

1. In a machine for applying liquid adhesive, a smooth surfaced endless belt, a pair of pulleys arranged to drive said belt horizontally therebetween, a cylindrical roll mounted to rotate about a xed axis directly beneath said belt in position to engage the surface thereof between said pulleys during the lower portion of its horizontal travel, means for applying a lm of adhesive to the surface of said roll, and an adjustably mounted deflecting device arranged to engage the inner side of the belt in parallelism with said axis and directly above said roll, to hold the belt in engagement with the surface of the roll.

2. In a machine for applying liquid adhesive,

Ya smooth surfaced endless belt, a pair of pulleys arranged to drive said belt horizontally therebetween, a cylindrical roll arranged directly beneath said belt in position to engage the surface thereof during the lower portion of its horizontal travel, means for applying a lm of adhesive to the surface of said roll, and a deflecting device arranged to engage the inner side of the belt to hold it in tangential relation with said surface and be adjusted to vary the force of engagement of the belt therewith.

3. In a machine for applying liquid adhesive, a horizontally rotatable roll having a cylindrical surface, means for applying a thin coating of ca f adhesive to said surface as the roll is rotated, a pair of horizontally mounted pulleys arranged one at each side of and above said roll, a smooth surfaced endless belt driven horizontally by said pulleys and normally held in proximity to, and

out of contact with the surface of said roll dur ilarly shaped pieces of sheet material, an endless belt arranged to be continuously driven in one direction in a position to permit the pieces to be placed on its outer surface, and means to apply adhesive to said surface in a plurality of sections having different portions thereof arranged in sequence in a plurality of rows which extend lengthwise of the belt and in different relative positions cross wise thereof, so that said sections are successively advanced to the position at which the pieces are to be applied thereto,

5. In a machine for applying adhesive to simlar pieces of sheet material, an endless belt arranged to be continuously driven in one direction and in position to permit thepiecesto be placed on its outer surface, and means for applying adhesive to said surface in a plurality of sections each composed of a group of adhesive carrying 5 portions of varying cement carrying capacity arranged in sequence longitudinally of the belt, said sections being applied in different positions transversely of the belt, so that they are successively advanced to the pieceV receiving position. 10'

6. In a machine for applying adhesive to sole shaped pieces of sheet material, an endless belt arranged to be continuously driven in one direction and in position to permit the pieces to be placed on -its outer surface, means to apply ad- 15 hesive to said surface in a plurality of sections each composed of a group of adhesive carrying portions of varying cement carrying capacity corresponding to the forepart, shank, and heel part portions of the pieces and arranged in se- 20 quence longitudinally of the belt, said sections being applied indifferent positions transversely of the belt so that they are successively advanced to piece receiving position.

IRVING L. KEITH.

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