US3041998A - Presser elements on cementing machine - Google Patents

Description

July 3, 1962 w, HEISELER 3,041,998

PRESSER ELEMENTS ON CEMENTING MACHINE Filed Jan. 27, 1960 .1 rates r fifrce 3,t?4l,998 PRESSER ELEMENTS N CEMENTING MACHINE George W. Heiseler, Saugus, Mass, assignor to Boston Machine Works Company, Lynn, Mass, a corporation of Massachusetts Filed Jan. 27, 1960, Ser. No. 5,903 Claims. (Cl. 118-251) This invention relates to improvements in a machine for applying a coating of liquid adhesive cement to a surface of an object, such as a skived sole for a shoe, which varies considerably in thickness. It is an object of the invention to enable the operator to apply a coating more quickly and thoroughly by using the machine than has been possible in the past. A further object of the machine is to ensure that the surface to be covered is completely covered by a film of cement with no voids. Another object of the invention is to dispense with the customary upper roll which has been employed incementing machines and which has often been a source of trouble when deposits of cement, bits of leather or other small objects in the pool of cement in which the lower roll is partially submerged have gathered on the lower roll in suflicient size to touch the upper roll when carried over the lower roll as hereinafter described. Occasionally cement will be dammed up under a work piece passing over the lower roll, this resulting in a wave of cement which may be high enough to touch the upper roll when the work piece has passed through the rolls. The omission of the upper roll eliminates the necessity of stopping the machine to clear the upper roll when it is fouled by accumulations of cement or other objects carried into contact with it by the lower roll.

For a more complete understanding of the invention reference may be had to the following description thereof and to the drawing, of which:

FIGURE 1 is a plan view of a cementing machine embodying the invention;

FIGURE 2 is a sectional view, on a larger scale on the line 2-2 of FIGURE 1; and

FIGURES 3 and 4 are sections, on a larger scale, on the lines 33 and 4-4 of FIGURE 2.

The machine in which the present invention is embodied may in general be similar to that described and illustrated in Patent No. 2,598,717, granted June 3, 1952. The machine includes a main frame which has a container 12 secured beside it or an integral part of it to hold a pool of liquid cement. Iournalled in the walls of the container is a horizontal shaft 14 on which is mounted a coating roll 16 within the container. In the top of the container is a rectangular opening 18 through which the top portion of the roll 16 projects to a level about the top of the container. The shaft 14 extends through the main frame and is driven by any suitable means (not shown). The roll 16 preferably has a number of spaced circumferential slots or grooves 20 in which ride the free ends of stripper fingers 22 to ensure the separation of the coated work-pieces from the roll. The surface of the roll is knurled or serrated, to assist in advancing work-pieces brought into contact therewith and to enable the roll to carry up from the pool more cement than would be carried by a smooth roll, the extra amount depending to some extent on the depth of the serrations. The roll is rotated counterclockwise, as viewed in FIGURE 2, so that the side at the right is the ascending side which carries a film of cement up from the pool for amplication to the under side of work pieces which are moved into contact with the roll. To facilitate feeding the work-pieces W to the roll, a top plate is mounted on the container with an edge close to but adjustably spaced from the ascending surface of the roll. A fixed table 32 may be provided adjacent to the top plate 39. Work-pieces may be placed on the table 32 and slid along by the operator to the top plate 30 and then across the top of the roll 16. According to the invention, a row of buttons 34 are resiliently pressed against the lip or margin 36 of the top plate which extends along the edge of the plate nearest to the roll 16. The margin 36 is preferably inclined downward toward the roll at an angle of about 30.

The buttons 34 are close together in a single row so that they all may bear on the inclined margin 36 when no work-piece comes between. suitable shape and material provided that they present a smooth rounded surface to the work pieces which pass under them. Hence a ball or cylinder of metal glass, hard resin or the like may be mounted to press a smooth curved surface on the margin 36 or work piece thereon. Each button is mounted on the lower end of a plunger stem 38 which is of smaller diameter than the button and is axially slidable through a bracket 43 which is mounted on upstanding ears 42 on the main frame 10. A compressed helical spring 44 surrounds the portion of each stem 38 between the bracket 40 and the button 34. A suitable stop element 46 is mounted on the upper end of each stem 38 to limit the extent to which the spring 44 can push the button 34 away from the bracket. As shown, the stop element 46 is a nut on the threaded upper end of the stem 38. The nut can readily be adjusted to hold the corresponding button 34 away from the inclined margin 36 of the top plate 30. Thus if a series of similar work pieces are being put through the machine, each work piece having a comparatively thick portion, the button or buttons under which the thick portion passes can be adjusted away from the plate margin 36 sufficiently to facilitate the insertion of the leading edge of the work piece between the buttons and the plate margin in the operation of feeding the work piece through the machine. The stems are preferably inclined so that their axes are at right angles to the inclined margin 36 of the top plate 30. The bracket is located directly over the roll 16. The end faces of the buttons 34 are rounded as at 50'.

In using the apparatus to apply coating to one face of the heel portion of a shoe sole blank the margins of which have been skived to a thin edge, the operator holds the blank with the heel portion thereof on the table 32, as indicated in FIGURE 1, and moves the blank toward the left to push the leading edge of the heel portion under the buttons 34. The feeding movement is continued by the operator, with some assistance from the knurled surface of the roll 16, until the trailing edge of the portion to be coated has passed the buttons 34 and has moved over the roll. The spring-pressed buttons bend the blank down as it crosses the margin 36 of the top plate so that all portions of the surface of the workpiece which pass over the roll come in contact therewith and are coated, and there is no opportunity for any of the cement to get on the upper surface of the work-piece. If, as often happens, a deposit of cement builds up on the roll under the lip of the top plate, it is eventually carried over the top of the roll and back into the pool wihtout touching any of the buttons 34. Since there is no top roll to be fouled by such deposits, the cement cannot reach the top faces of the work-pieces.

I claim:

1. In a cementing machine having a container for a pool of liquid cement, a horizontal roll mounted in said container, means for rotating said roll, and a top plate on said container having an edge near the surface of said roll and adjustably spaced therefrom; a series of presser They may be of any buttons closely spaced together in a line, and means resiliently pressing said buttons toward the margin of the top surface of said top plate at said edge, said pressing means comprising a bracket mounted above said roll, a series of plungers slidably carried by said bracket, each said plunger having one of said buttons mounted on its lower end, and spring means resiliently pressing each said plunger and its button downward.

2. A machine as described in claim 1, each said button having a rounded end face pressed against said margin of the top plate.

3. A machine as described in claim 1, said top plate being horizontal except for said margin which slopes downward toward the roll, said plungers being inclined so that their aXes are approximately at right angles to said margin.

4. A machine as described in claim 1, said bracket being located directly over said roll.

5. A machine as described in claim 1, each said plunger having a stem of smaller diameter than the button mounted on the lower end thereof, said stem extending through and projecting above said bracket, a compressed helical spring surrounding the portion of the stem of each plunger between said bracket and the button on said stem, and a stop element on said projecting portion of the stem adjustable longitudinally thereof.

References Cited in the file of this patent UNITED STATES PATENTS 663,501 KirkWood Dec. III, 1900 1,837,032 Evans Dec. 15, 1931 2,551,804 Marasco May 8, 1951 2,567,234 Phillips Sept. 11, 1951 2,598,717 Osgood June 3, 1952

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