US1965667A - Inseam cementing machine - Google Patents

Description

y F. RICKS I INSEAM CEMENTING' MACHINE Filed Aug. 5, 1933 Fig.1.

WVE/VTUAZ 4% M Patented July 10, 1934 PATENT OFFICE INSEAM CEMENTING MACHINE Fred Ricks, Leicester, England, assignor to United Shoe Machinery Corporation, Paterson,

N. J., a corporation of New Jersey Application August 3, 1933, Serial No. 683,495 In Great Britain October 14, 1932 6 Claims.

This invention relates to machines for applying cement to shoes and is herein illustrated asembodied in a machine particularly adapted for applying rubber latex to the bottoms of Goodyear welt shoes prior to the sole laying operation.

In the manufacture of Goodyear welt shoes, it is customary temporarily to secure the soles in position upon the shoes by means of cement applied to the attaching surface of the sole and to the bottom of the shoe, including the attaching surface of the welt, the inseam and the adjacent parts, before the sole is laid on theshoe. Permanent attachment of the sole, as by stitching, is more readily carried out when the sole is thus temporarily held in position. If latex is to be applied to a shoe bottom by means of a machine embodying a brush, difiiculty is experienced because of the coagulation of the latex in the brush as a result of which the brushes are rapidly rendered unusable and therefore require frequent cleanings. On the other hand, the application of latex by means of an applying roll to a piece of work such as the bottom of' a shoe, including the inseam and the welt, presents some difficulties because of the uneven surface to be treated. This difficulty is aggravated by the curvatures of the bottoms of shoes and the fact that the marginal portions of such shoe bottoms are made of rigid and relatively flexible portions. It will be seen that the inner portions of the margin, comprising a shoe filler and the edge'of the inseam including the edge of the welt, are supported by the last and hence are substantially rigid. On the other hand, the welt, the attaching surface of which is to be coated, inevitably has some degree of flexibility.

Quite often it may be found, especially in mens work, that the margin of the welt which is attached to the shoe forms a small but definite upstanding ridge and that the outer margin of the welt, before it is attached to the sole, extends outwardly in a'plane somewhat different from the plane of the edge of the inseam.

Accordingly, it is an object of the invention to provide an improved machine for coating the margins of the bottoms of shoes by means of which it is possible to apply the coating material substantially uniformly and with economy in the quantity of cement and in the labor cost. In the illustrated machine, the coating applying roll is stepped to provide a narrow portion of larger diameter adapted to coat the outstanding welt while the balance of the roll applies a coating to the inseam and adjacent margin of the bottom of the shoe. The welt is supported in contact with this enlarged applying portion by means of a presser member in the form of a frusto-conical disk held yieldingly in engagement with the upper or grain surface of the welt. As illustrated, this supporting disk is mounted for rotation upon a downwardly and outwardly inclined axis, leaving the supporting surface substantially horizontal and providing a wedging action to lift the welt into firm contact with the applying roll.

In the drawing,

Fig. 1 is a front elevation of the operating parts of my novel machine, and Fig. 2 is a view on a larger scale of the workengaging rolls shown in operative relation to a portion of a shoe illustrated in section.

Generally the organization of the machine is like that disclosed in Letters Patent of the United States No. 1,851,162, granted March 29, 1932, upon the application of John W. Cosgrove. Substantially as in that machine, a coating fiuid such as latex is picked up from an open receptacle 7 (not shown) by means of a supply roll 114, the quantity being controlled by a doctor roll (not shown). This coating material is delivered by means of a transfer roll 118 to the applying roll 120, all of these rolls being mounted upon driven shafts in the frame of the machine. The applying roll 120, the under surface of which is exposed for the application of work, is provided with a stepped portion 121 which is narrow and of somewhat larger diameter than the body of the roll. In order to supply the latex to this stepped applying roll 120, the supplying roll 114 and the transfer roll 118 are also stepped, being made complementary to one another and of gradually increasing widths. Any latex which is not used is carried back by the under sides of the rolls 118 and 114 into the receptacle, thereby avoiding dripping from the applying roll.

A work-supporting presser member or disk 152 is carried by an arm 126 pivoted at 128 in the frame of the machine. This arm is urged in a clockwise direction by a spring 138 and its limiting upper position is defined by an adjustable stop screw 130. The arrangement of this screw is like that shown in the Cosgrove patent mentioned above. The disk 152 is supported for free rotation upon a stud 135 the axis of which is inclined downwardly and outwardly to the left, as viewed in Fig. 1. 'This stud 135 is carried in a secondary arm 136 received in a bore in the arm 126 and adjustable toward and away from the applying roll, being clamped in adjusted position by a thumb screw 148. The work-supporting surface 154 of the presser disk 152 is substantially horizontal where it engages the work. To this end the disk is frusto-conical. The disk is dish-shaped upon its under surface and is provided with a rounded outer edge 155. As a result of this construction of the disk, it is enabled to enter the welt crease all around the periphery of the shoe, being equally suitable in the shank and in the forepart portions of the shoe;

and a wedging action will be produced tending to lift the attaching surface of the welt into firm contact with the stepped portion 121 of the applying roll.

In the use of the machine, thesupporting disk 152 will be depressed by aitreadle (not shown) attached to a treadle rod 172 and the work will be positioned, as shown in Fig. 2, with the welt w of a shoe S interposed between the stepped portion 121 and the supporting surface 154 of the disk 152. The drawing represents a condition sometimes found in welt shoes in which the outwardly extending welt w attached t'oan insole s, as by stitching, forming the inseam or between substance 2', will normally lie somewhat below the exposed edge of the inseam and hence ,may be more readily gripped between the enlarged stepped portion 121 of the applying roll and the upper surface of the supporting disk. As the work is presented to the disk 152 it will be pushed firmly against the edge of the disk, thereby to wedge the welt w into firm contact with the applying roll. A surplus of latex will accumulate at the corner 123 between the body portion of the roll 120 and the stepped portion 121 and this surplus will enter the irregularities ofthe inseam and to a large extent will render waterproof the line of stitching by means of which the welt is attached. The enlarged portion 121 may have a smooth surface, as illustrated, or, if desired, it may be knurled or roughened in "any desired fashion, thereby to carry a greater Preferably, however, the body,

volume of latex. of the roll 120 will be smooth in order not to disturb the plastic filler j which, at the time when the shoe is presented to this machine, mayv not have entirely hardened and would therefore be subject to displacement in case of vigorous contact between the applying roll and the filler.

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

1. In a machine for applying cement to the bottoms of Welt shoes, a stepped applying roll having adjacent portions of different diameters,

and means for supporting a welt attached to a shoe in contact with one portion of said ap- Having a rounded outer edge 155, theedge of the disk will not reach the apex of the crease.

plying roll while the other portion contacts with the adjacent margin of the shoe bottom.

2. In a machine for applying cement to the bottoms of welt shoes, a stepped applying roll the under surface of which is exposed to facilitate the presentation of work thereto and having adjacent portions of difierentdiameters; and a rotatable disk for holding the attaching surface ofv aiwelt in contact with the portion of the roll of larger diameter while the other portion of the roll applies cement to the inseam and the adjacent margin of the bottom of a shoe to which the welt is'secured.

3. In a machine for applying cement to the bottoms of welt shoes, a stepped applying roll having adjacent portions of different diameters, and a cooperating work-supporting disk having a wedge-shaped periphery to enter the welt crease of a shoe and to support the attaching surface of a welt in engagement with one portion of the stepped roll.

4. In a machine for applying cement... to [the bottoms of welt shoes, a stepped applyingroll.

having adjacent portions of difierent diameters with the portion of larger diameter narrower than the portion of smaller diameter, and operatorcontr'olled means for supporting. a: welt in engagement with the narrower portion of. the applying roll while the operator presents the adjacent inseam and margin of the bottom of. a

shoe to which the welt is secured, to the wider portion of the applying roll.

5. In a machine for applying cement to.the. bottoms of welt shoes, a stepped, applying roll.

having adjacent portions of different diameters with the portion of larger diameter shorter than the portion of smaller diameter, a supportingdisk with a wedge-shaped periphery for holding a welt on a shoe in engagement with the portion.

of larger diameter, said. disk being mountedfor free rotation upon an axis inclined downwardly and outwardly of'the machine, and meansfor pressing said roll intofirm engagement with. the grain surface of the welt;v

6. In a machine for coating the bottoms: oi welt shoes, a stepped applying roll having adjacent por-- tions of different diameters, and means for supporting an attached. Welt in contact. with. one.

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