US2038561A - Coating machine - Google Patents

Description

- April 28, 1936. HA WA 2,038,561

COATING MACHINE Filed March 15, 1933 2 Sheets-Sheet 2 a Z3 w i patented Apr. 28, 1936 UNITED STATES PATENT OFFICE COATING MACHINE Application March 15, 1933, Serial No. 660,893

17 Claims.

My invention relates to machines for applying an adhesive coating to articles, it being particularly designed for operating upon Welt-shoes.

Before laying soles upon the bottoms of weltshoes in preparation for their attachment by stitching, it is customary to apply to what is normally the under surface of the welt, this being the flesh-side, and to the adjacent surface of the bottom over the inseam, a coating of some such adhesive as latex. An object of this invention is to make an application of this character efliciently at a rapid rate, the adhesive being spread thinly and uniformly over certain of the areas to be coated while, at the same time, the welt with its somewhat irregular contour height- Wise of the shoe may be flattened and smoothed. To achieve this object, I combine with a presser member for contact with the upper or grain surface of the welt, which is exposed in the finished shoe, an opposed coating-applying member, together with means for producing relative approaching movement between the members yieldably to force one toward the other. The applying member may operate over the under or attaching surface of the welt and over the inseam. By this arrangement, a thin coating may be evenly spread upon the relatively smooth surface of the welt, while upon the more uneven surface of the inseam material, which is under less pressure, a thicker coating may be applied which insures adhesion and which seals the seam, tending to make it waterproof. There may be associated with the work-engaging members means for disposing the surface of the welt in approximately the same plane as the betweensubstance of the inseam so a greater spacing between this part of the work and the applying member will not cause a too thick coating upon the welt. The engagement of the applying member with the welt is preferably over an inner area only. By omitting the application of the adhesive to the outer margin of the welt, the finish of the edge is not marred by the line which might appear between the Welt and the outsole. The pressure exerted upon the welt by the coating-applying member and the opposed member will be made sufficient to flatten irregularities in it, this being effected simultaneously with the coating operation, thereby accomplishing in one operation what is now done by two operations. This opposed member may be provided with means for exerting a stretching force upon the welt transversely thereof to extend to their full width portions which may have been drawntoward the upper during attachment, and a force for also holding the work in proper engagement with the operating means. The illustrated embodiment of the invention combines a rotatable cement-applying roll and a work-supporting or pressing disk having a reduced edge arranged to enter the crease between the upper surface of the welt and the adjacent shoe-upper, these members being rotated by power to move their workcontacting portions in the same direction and thereby cooperating to feed the work rapidly forward for the coating of the welt and inseam and the smoothing of the Welt. The periphery of the disk is shown as rounded, so as it engages a shoe in the crease it will exert a wedging action against the welt which will aline this transversely with the between-substance for the reason previously noted. The transverse force may be applied to the welt by projections formed between grooves in the contact-surface of the disk, these grooves being inclined outwardly and forwardly in the direction of rotation. The coating and the work-supporting members are conveniently mounted upon pivoted arms, including a primary arm upon which the applying member is rotatable and a secondary arm pivoted upon the primary arm and having the work-supporting disk rotatable upon it. The normal space between the members may be varied, as by an adjustment of the arms, and the members may be adjusted. in their transverse relation to each other, for instance by mounting the disk upon a support movable longitudinally of the arms. A spring preferably furnishes the pressure exerted by the work-engaging members, there being means shown for varying the force of the spring.

A particular form of my invention is shown in the accompanying drawings,

Fig. 1 being a broken perspective View thereof;

Fig. 2, a broken front elevation of the elements more closely co-operating with the work;

Fig. 3, a top plan view of the work-supporting disk; and

Fig. 4, a diagrammatic view of the gearing.

Generally, the machine may be organized as is that disclosed in Letters Patent of the United States, No. 1,851,162, Cosgrove, March 29, 1932. A frame it supports a trough l2 to which is delivered latex or other cement. Dipping in the trough is a driven rotatable supply-roll I4 with which co-operates an adjustable stripper-roll l6 and two successively acting transfer-rolls l8 and 29 geared at 2| (Fig. 4) to the supply-rolLto turn as indicated by the arrows in Fig. 1. The transfer-roll i8 is shown as longer than the supply-roll, projecting beyond its ends. It thus may gather the beads of cement which tend to accumulate at the peripheral edges of the supplyroll and return these at its upgoing side to said roll. The transfer-roll 20 is shorter than the roll l8 above it, and it too, as the cement gathers upon its ends, disposes of this upon the roll l8 without transfer of the accumulated beads to the next lower and, as shown, narrower roll of the chain. The roll 20 delivers cement from its peripheral surface to an applying roll 22 carried by a shaft 24 rotatable in an arm 26 pivoted at 28 upon the frame, and urged toward the transfer-roll by a spring (not shown) to an extent determined by an adjustable stop 39, as in the previously-mentioned Cosgrove patent. The roll 22 preferably has upon its applying surface a dress consisting of small, shallow pockets which will contain relatively little cement. The quantity supplied to it may be minimized by adjustment of the stripper-roll l6 and also by varying the spacing between the rolls 20 and 22 through alteration in the position of the stop 30. The roll-shaft 24 is geared to the preceding elements of the train through an idler 32 (Fig. 4) so it rotates similarly to the roll 20. This roll 20 is preferably of a length at least equal to the longest roll 22 which it may be desired to employ.

Pivoted at 34 upon the primary arm 26 is a secondary arm 36, forced upwardly by a spring 38, interposed between depending portions of the two arms, to an extent determined by a stopscrew 40. This screw appears as threaded vertically through a lug upon the front of the arm 26 for contact with the arm 36. The force exerted upon the arm 36 by the spring may be adjusted by a screw 42 threaded through the depending end of the arm and against which the spring abuts. Guided for adjustment upon and longitudinally of the arm 36 is a block or support 44 held in the desired position by a slot-andscrew connection 48. Upon an upwardly and outwardly inclined projection 50 from this support is mounted for rotation about a substantially vertical axis a disk 52. The axis of the disk, while substantially vertical, is inclined upwardly slightly away from the applying roll to the end that the edge of the disk 52 enters the welt crease more easily. This disk, as illustrated, is frusto-conical, with its base-surface 54 uppermost and opposite the inner cement-applying periphery of the roll 22, into engagement with which it presses the work. The force applied by spring 38 is considerable to the end that the coacting rolls 22 and 52 are effective to roll or flatten the welt simultaneously with the application of cement, thereby eliminating one operation. This surface 54 is approximately horizontal, and from it the conical wall of the disk is inclined downwardly and inwardly to allow the edge of the disk to enter the crease of a shoe between the welt and upper. Thus, the surface 54 may be caused to lie beneath and engage the greater part of the exposed upper or grain-surface of the welt. The edge of the disk at 55 is shown (Fig. 2) as rounded and relieved or reduced, so when a shoe is applied to said disk its edge will not reach the apex of the crease and as a shoe is pushed against the wedge-like edge of the disk 52, the latter bearing against and between the last-supported upper and the welt will produce a wedging action which will tend to lift the under surface of the welt into the plane of the between-substance of the inseam for a purpose which will later be explained. Secured to the under side of the disk is a bevelgear 56 with which meshes a like gear 58 upon a shaft-section 60 rotatable in the block 44. An inclined shaft-section 62 joins, through universal connections 64, 64, the section 60 to a shaft 66 journaled horizontally in the arm 26. This shaft 66 is capable of sufficient longitudinal movement in its bearings to permit the adjustment of the block 44 without interference. Said shaft and the connected elements are geared to the shaft. 24 to turn in the same direction by means of an idle gear 68 (Figs. 1 and 4). This causes the outer portion of the disk-surface 54, which is opposed to the applying surface of the roll 22, to rotate at a mean rate substantially equal to the peripheral speed of said roll, co-operating therewith to feed forward work which may be placed between them and avoids the necessity of pushing or dragging the work along manually between the roll and disk held thereagainst under considerable pressure. A fingerguard 69 closes the space between the roll and disk at the inner side of the former. In the workengaging surface 54 of the disk, which projects beneath and forces a supported welt against the applying roll, I prefer to form grooves 16 (Fig. 3). These grooves extend across the disk-surface and are inclined forwardly with respect to the direction of rotation. They produce between them projections which give more positive engagement with the work to insure its advance, and in their travel across the welt exert a force to create a tension transversely thereof. This also has the effect of drawing the work in so the edge of the disk enters the crease as far as it can, thus relieving the operator of thought and efiort in this connection. It also tends to stretch and straighten portions of the welt, where this may have been drawn under in stitching, and accentuates the wedging action previously mentioned. The disk 52 may be lowered by a pull upon a chain 12, leading from the under side of the arm 36 to some such actuating means as a treadle. This allows the disk to be separated from the applying roll 22 for introduction of the work at any point about the welt or to be considerably spaced from said roll when the apparatus is not in use. For the latter purpose, the arm 36 may be temporarily secured in its depressed position by a latch 14 pivoted between parallel depending flanges 15 upon the arm 26 and provided with a projection for retaining engagement with a projection 16 upon the arm 36. A spring 18 is shown for drawing the latch into contact with the arm. A finger-piece 8B facilitates the lowering of the latch to release the arm 36 for elevation by the spring 38.

As an example of the work which this machine is adapted to perform, there is shown, in Fig. 2 of the drawings, a lasted shoe-upper S, with its insole s and welt w, stitched together at the inseam i. An applying roll 22 is preferably chosen which will extend at its applying periphery across the Welt from a point somewhat removed from the outer edge, so a narrow margin will be left uncoated, and inwardly of the bottom of the shoe over the inseam including the inner channel-flap. By changing the position of the disk 52 through adjustment of its support 44, the entrance of the rounded reduced edge 55 into the crease may be caused to locate the work in the chosen relation to the applying roll, while the disk-surface 54 fully supports the welt. The spring 38 at this time presses the surface 54 toward the applying roll with the desired force, the stop-screw 40 preventing the disk from coming into contact with the cement on the roll when no work is between them. Adjustment of the distance between the stripper-roll l6 and the supply-roll l4 and between the applying roll 22 and the transfer-roll 20, together with an applying surface of the proper character upon the roll 22, will insure the delivery of the correct quantity of cement. An end of the welt w being introduced between the supporting surface 54 and the opposed applying surface, with the edge 55of the disk 52 seated in the crease between the upper and the welt, the rotation of the applying roll and disk will cause the work to be fed rapidly forward. Under the influence of the spring 38, the disksurface 54 holds the work, and especially the welt, firmly against the applying roll to receive cement therefrom as it is fed forward, and simultaneously rolls and smooths what is normally the upper welt-surface. Due to the pressure with which the work is held against the applying roll 22, any surplus latex builds up on the surface of the welt just ahead of the applying roll and runs into any existing depressions or cavities such, for example, as the seam in the welt, filling and sealing them. The grooves 10 in the surface 54 give more positive feeding engagement, and by their inclination put the transverse stress upon the welt which tends to force the shoe laterally into engagement with the disk. This holds the shoe in the desired relation for its feed without effort upon the part of the operator, and by the wedging action of the disk 52 lifts the welt into transverse alinement with the between-substance of the inseam, so a more uniform application of cement is obtained, an unduly thick coating of the welt being prevented. The area of maximum pressure is between the disk-surface 54 and the opposite periphery of the applying roll 22, and any cement which is forced out tends to pass to the area of less pressure over the inseam to seal and render it more waterproof. The uncoated margin of the welt left at the inner end of the applying roll 22, effectively guards against the production of a visible line of cement between the welt and applied outsole after the edge has been trimmed, though the thinness of the coating which I am able to apply makes this line inconspicuous. Over the entire area operated upon, the coating is thin as compared with that applied by apparatus previously employed, this resulting in a very marked economy of cement.

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

1. In a machine for operating upon welt-shoes, a coating-applying member, and an opposite member having a surface for contact with the welt of a shoe, said surface being provided with projections constructed and arranged to exert a stretching force upon the welt transversely of the length of the welt.

2. In a machine for operating upon welt shoes, a coating applying member coacting with one surface of a welt, and an opposite member coacting with the opposed surface of the welt, said opposite member being movably mounted to carry a point upon its welt contacting surface transversely of the length of the welt face inwardly and then outwardly, the welt contacting surface of said member being constructed and ar ranged to exert a greater force upon the welt when moving outwardly than when moving inwardly whereby the welt will be stretched transversely of its length.

3. In a machine for operating upon welt-shoes,

a driven coating-applying member, an opposite member having a surface for contact with the welt of a shoe, driving means for rotating the latter member, said surface being provided with means for exerting a force transversely of the length of the welt, and means for producing relative approaching movement between the members to flatten the welt during the application of the coating.

4. In a machine for operating upon welt-shoes, a contact-disk having a rounded reduced edge arranged to enter between the upper surface of the welt of a shoe and the adjacent shoe-upper, a coating-applying roll opposed to the contactdisk for contact with the welt, means for driving one of said work-contacting parts to feed the Work, and means for causing a relative movement between the roll and disk to force one toward the other to flatten the welt.

5. In a machine for operating upon welt-shoes, a contact-disk having a rounded reduced edge arranged to enter between the upper surface of the welt of a shoe and the adjacent shoe-upper, the contact-surface of the disk being constructed and arranged to exert a force transversely of the length of the welt to stretch it, a coating-applying roll opposed to the contact-disk, means for producing a relative movement between the roll and disk to force one toward the other, and means for rotating the roll and disk to move their adjacent faces in the same direction.

6. In a machine for operating upon welt-shoes, a rotatable contact-disk having a rounded reduced edge arranged to enter between the upper surface of the welt of a shoe and the adjacent shoe-upper, the contact-surface of the disk being provided with grooves inclined outwardly and forwardly in the direction of rotation, a rotatable coating-applying roll opposed to the contactdisk, means for producing a relative movement between the roll and disk to force one toward the other, and means for rotating the disk and roll in directions such that they coact with one another in feeding the Work.

'7 In a machine for operating upon welt-shoes, a rotatable coating-applying roll, a support movable transversely of the peripheral applying surface of the roll, a disk rotatable upon the support and having a reduced edge' arranged to enter between the welt of a shoe and the adjacent shoeupper, and means arranged to fix the support with the edge of the disk in different positions transversely of the applying member.

8. In a machine for operating upon welt-shoes a rotatable coating-applying roll, a support mov able transversely of the peripheral applying surface of the roll, a disk rotatable upon the support and having a reduced edge arranged to enter between the welt of a shoe and the adjacent shoeupper, means arranged to fix the support with the edge of the disk in different positions transversely of the applying member, and a spring acting upon the support to urge the contact-surface of the disk toward the applying surface of the roll.

9. In a machine for operating upon Welt-shoes, a rotatable coating-applying roll, a support movable transversely of the peripheral applying surface of the roll, a disk rotatable upon the support and having a reduced edge arranged to enter between the welt of a shoe and the adjacent shoeupper, means arranged to fix the support with the edge of the disk in different positions transversely of the applying member, a spring acting upon the support to urge the contact-surface of the disk toward the applying surface of the roll, and means arranged to vary the force of the spring.

'10. In'a welt-shoe-cementing machine, a rotatable cement-delivering roll, a rotatable cementapplying roll, a rotatable frusto-conical worksupporting disk having its edge adapted to enter between the upper and welt of a shoe with its base surface contacting the welt to support it, means arranged to vary the normal space between the applying roll and the delivering roll, and means arranged to vary the normal space between the welt-contacting surface of the disk and the periphery of the applying roll.

11. In a cementing machine, a frame, a cement-delivering member rotatable thereon, a primary arm pivoted upon the frame, a cementapplying member rotatable upon the primary arm opposite the delivering member to receive cement therefrom, a secondary pivoted arm, a work-supporting member rotatable upon the secondary arm opposite the applying member to grip a piece of work in contact with said applying member, and means arranged to vary the spaces between the opposed pairs of members.

12. In a cementing machine, a frame, a cement-delivering member rotatable thereon, a primary arm pivoted upon the frame, a cementapplying member rotatable upon the primary arm and receiving cement from said delivering member, said applying member being mounted for adjustment toward and away from the delivering member, a secondary pivoted arm, a support movable longitudinally of the secondary arm, a work-supporting member rotatable upon the support, and means for securing said support in its adjusted position thereby to determine the relation of the work-supporting member to the cement-applying member.

13. In a cementing machine, a frame, a cementdelivering member rotatable thereon, a primary arm pivoted upon the frame, a cementapplying member rotatable upon the primary arm, a secondary arm pivoted upon the primary arm, and a Work-supporting member rotatable upon the secondary arm.

14. In a cementing machine, a frame, a cement-delivering member rotatable thereon, a primary arm pivoted upon the frame, a cementapplying member rotatable upon the primary arm, a secondary arm pivoted upon the primary arm, a Work-supporting member rotatable upon the secondary arm, and space-adjusting means interposed between the frame and the primary arm and between the primary and secondary arms.

15. In a machine for operating upon shoes to prepare a lasted and welted shoe for the reception of an outsole, a receptacle for cement, a driven coating-applying member supplied therefrom, a coacting driven crease-entering, weltsupporting member, and means to cause said members to grip firmly an interposed Welt attached to a shoe, thereby simultaneously to squeeze and hence to roll out the welt and to apply a coating of adhesive to the under or flesh surface of the welt.

16. In a machine for operating upon shoes to prepare a lasted and welted shoe for the reception of an outsole, a driven rotatable welt-supporting member, a receptacle for cement, and a driven rotatable applying member supplied from said receptacle, and. opposed to said supporting member, said members coacting with opposite surfaces of the welt and constructed and arranged simultaneously to coat the under or flesh surface of the welt and to stretch the welt.

1'7. In a machine for operating upon shoes to prepare a lasted and welted shoe for the reception of an outsole, a receptacle for cement, a driven coating roll supplied therefrom coacting with the under surface of the welt and with the inseam, and a driven crease-entering member urged toward the other side of the welt, said coating roll and said crease-entering member being constructed and arranged to cooperate with one another and the work gripped between them thereby simultaneously to coat the inseam and Welt and to flatten the welt thereby to cause it to extend outwardly from the shoe in substantially the position which it will occupy in the completed shoe.

JOHN B. HADAWAY.

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