US2134723A - Press for attaching rubber trim - Google Patents

Description

NOV- 1, 1938 J. P. MARSHALL PRESS FOR ATTACHING RUBBER TRIM Filed Marohil, 195e '2 Sheets-Sheet 1 NOV- 1 1938. J. P. MARSHALL PRESS FOR ATTACHING RUBBER TRIM l Filed March 11, 195 2' sheets-sheet 2 mmmww Patented Nov. 1, 1938 l 2,134,723

UNITED STATES PATENT OFFICE PRESS FOR ATTACHING RUBBER TRIM James P. Marshall, Coventry, R. I., assignor, by mesne assignments, to Goodyear Footwear Corporation, a corporation of Delaware Application March 11, 1936, Serial No. 68,190

2 Claims. (Cl. 12-52) This invention relates to improvements in a understood that the two dies need not be of press for attaching rubber trim, the same configuration but that one may be In the manufacture of footwear such as tennis shaped to determine one kind of trim and the shoes, it is customary to apply to the outside of other die differently shaped to determine a dife 5 the upper various pieces of rubber trim or foxferent kind of trim. Within the body of each 5 ings such as an angle patch, an eyelet stay, and die block is one or more heating elements 6, an arch strap. In some cases these are stitched here .shown as electrical elements, the supply to the upper and in other instances they are of heat to which is controlled by a suitable heat secured by adhesion. actuated and heat responsive device I of any lo It is an object of this invention to provide a suitable design. l press for attaching such rubber trim to the up- Also mounted on the base I at the rear of the per by adhesion and to this end it is a further die blocks are standards 8, 9 each of which object to provide a press having two plungers supports a cylinder I0, II respectively. In each for applying suitable pressure, cooperating dies cylinder is a piston I2, I3 and on the rod I4, I5 l5 for determining the shape and size of the trim, of the latter, which extends downward through 15 and heating means with automatic control for a suitable packing box I6, Il is a pressure plate determining the proper heat to be used during I8, I9. Plate I8 is arranged to overlie die 4 the period in which the pressure is applied. Other on the block 2 and plate I9 similarly overlies objects and features of the improved apparatus the die 5. Upon the application of pressure to will become apparent as the detailed description the upper sides of the pistons the plates are forced 20 develops. toward the dies and when pressure is applied The best mode in which it has been contem to the underside of the pistons the plates are plated to apply the principles of the invention is Withdrawn from the dies. shown in the accompanying drawings, but these In applying a trim to an upper of a shoe, a are to be taken as merely illustrative and it is section A of gum rubber sheet material is laid intended that the patent shall cover by suit-V on the die, as seen in Figure 5. This section is able expression in `the appended claims whatof greater extent than the die. The upper B is ever features of patentable novelty exist in the then laid on the said section A of sheet mainvention disclosed. p terial, being positioned relative to the die so that In the accompanying drawings: one edge BI of the upper registers with an edge 30 Figure 1 is a front elevation of a press con- 5c of the die (see Figure 6). The edges of the structed in accordance with the principles of this die, as seen at 5d are slightly raised to afford invention; a sort of cutting edge which penetrates into the Figure 2 is a side elevation as seen from the rubber as the pressure is applied to the upper left of Figure 1; surface of the upper. The plate overlying the 35 Figure 3 is a vertical section, as on line 3-3 of position upper is now ready t0 be lowered into Figure 1, through one controll valve; contact therewith, and this is effected by a novel Figure 4 iS a VerlJiCal SECOH, aS 0n 1in@ 4-4 0f combination of piping and control valves, so cor- Figure 1, through the other control valve. related as to protect the operator from danger Figure 5 iS a plan View, taken aS 0n line 5-5 of his or her hands being under the descending 40 of Figure 1; pressure plate.

Figure 6 is a vertical section as on line 6 6 Fluid pressure such as compressed air is supof Figure 5; and plied through a pipe 2l! and leads through a Figure 7 is a DelSDeCiVe, partly in section as branch 2| to one control valve 22. This is s0- though taken on line 6-5 of Figure 5 and incalled three-Way valve. When the operating 45 Verted, Sl'lOWng a DOIOII 0f the upper and trim handle 23 of this valve is in its upright position, applied thereto. as shown in Figure 1 (and as seen partly in Referring more particularly to the drawings, full lines in Figure 3), the valve proper is set the press comprises a base to which are Seso that its main diametrical port 22a connects cured die blocks 2 and 3. Each block is propipe 2| with a pipe 24. From the latter two 50 vided With an upstanding die 4, 5 0n its 150D branches extend, one branch 25 leading to the face, and as here shown these dies are of the lower portion of cylinder I0 and the other branch same design, one portion 4a, 5a determining an 26 leading to the upper side of cylinder Il. With eyelet stay and the other portion 4b, 5b deterthe valve 22 thus positioned, that is with its mining an arch strap. It is, of course, to be diametrical port connecting pipe 2| with pipe 24, 55

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and with its radial port 22h closed by the valve casing, the fluid pressure will pass to the underside of piston I2 and to the upper side of piston I3, thereby tending to lift the pressure plate I8 and to depress the other plate I9.

Branch pipe 28 from the main fluid supply pipe leads to a second control valve 29. This is of the same design as the other, but its operating handle 38 is so mounted with respect to the valve proper that when the handle is vertical, as seen in Figure 1, (and as shown partly in full lines in Figure 4), the fluid supply in pipe 28 is cut off and the diametrical port 29a is in register with a-vent 28C in the wall of the valve. The radial port 29h is in register with a pipe 3|, from which one branch 32 leads to the upper portion of cylinder I8 and another branch 33 leads to the lower portion of cylinderl Il. Thus with valve 22 set to admit pressure to one end of the cylinders, the other valve 29 is set to permit fluid to escape from the opposite ends of the cylinders.

When the control handles are moved to their horizontal positions, as indicated in dotted outline in Figures 3 and 4, the diametrical port 22a of valve 22 will register with vent 22e and the radial port will be opposite the end of pipe 24. Thus pressure from both cylinders may escape through branches and 26 and pipe 24. When handle 30 of valve 29 is horizontal, the diametrical port 29a will connect pipe 28 and pipe 3l and pressure will flow through branches 32 and 33 to the cylinders. Radial port 29D will be closed by the wall of the valve.

In the operation of the press, both valves should be shifted together and thus the control of these valves causes the operator, after placing the rubber section A and the upper B on one die, to reach with both hands for the valve handles 23 and 30. Both handles are then thrown together from vertical to the horizontal position (or vice versa) and as a result the pressure plate which is down will move upward and the one which is up will move downward.

As the descending plate engages the upper it is pressed rmly against the gum rubber section and the latter pressed firmly against the die. Since the latter is properly heated, the combined effect of this heat and the pressure causes that portion of the gum rubber section in contact with the die to adhere rmly to the upper. Overheating of the rubber is prevented by the automatic heat responsive control devices 1. While an upper is under pressure under one plate, the upper which has just previously been acted upon by the other plate and die can be removed. The excess of the rubber section outside the lineal indentation made by the raised edges 5d of the die can be readily torn off by the operator, leaving the trim C firmly in place on the upper B as seen in Figure '7. By suitably indenting the upper face of the die (indicated by dotted lines on die 4 in Figure 5) slight protuberances C may be formed on the trim to simulate stitches.

I claim:

1. A press for attaching rubber trim to a shoe upper comprising, in combination, a pair of dies of configuration conforming to the trim to be attached; means for heating each die to a predetermined temperature; pressure plates arranged to be moved toward and from said dies; pressure actuated means for moving each of said plates; and means controlling the application of pressure upon the last said means to the end that as one plate moves toward its die, the other plate is Withdrawn therefrom.

2. A press for attaching rubber trim to a shoe upper comprising, in combination, a pair of dies of configuration conforming to the trim to be attached; pressure plates arranged to be moved toward and away from said dies; a cylinder with piston therein for moving each pressure plate; and a pair of Valves controlling the admission and escape of fluid to said cylinders; said valves being so organized and connected to said cylinders that when one valve is set to admit uid to one cylinder to cause its pressure plate to move toward its respective die, iluid is simultaneously admitted to the other cylinder to cause its pressure plate to move away from its respective die, and uid is permitted to escape from the end of each cylinder toward which its piston is being moved.

JAMES P. MARSHALL.

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