US1558496A - Method of uniting alpha rubber heel and leather base - Google Patents

Description

Oct. 27, 1925. 1,558,496

D. PARKS METHOD OF UNITING A RUBBER HEEL AND LEATHER BASE Filed Jan. 31. 1924 Patented Oct. 27,1925.

UNITED STATES PATENT OFFICE.

DENNIS PARKS, OF ST. LOUIS, MISSOURI.

METHOD OF UNITING A RUBBER HEEL AND LEATHER BASE.

Application filed January 31, 1924. Serial No. 689,789.

To all whom it may concern:

'Be it known that I, DENNIS PARKS, a citizen of the United States, residing in the city of St. Louis and State of Missouri, have invented new and useful Improvements in Methods of Uniting a Rubber Heel and Leather Base, of which the following is a specification.

This invention relates to the art of heel building, and more particularly to that branch of this industry which consists in securing a rubber heel to a leather base.

In building a composite heel blank consisting of a leather base and rubber tread or heel, I follow the general plan of procedure utilized in so-called log building, in which the heel lifts, either whole or pieced, supplied with paste, are forced downward in a container having, in cross-section, the general shape of a heel blank, and which offers suficient, resistance to require con siderable pressure to force the column downward, so that the lifts are maintained in column formation and under pressure for a sufficient length of time to allow the paste used in connecting the lifts together to set. The process, as heretofore practiced by me, differs from that of straight log build ing, in that each heel blank is built as a unit. As applied to composite heels of leather and rubber, the rubber heel has been inserted in the container in a horizontal position, the leather base with paste applied placed on top of the rubber heel, and then a plunger operated to force the heel blank downward in the container. A standard rubber heel, as now constructed, has its breast side in clined rearwardly from the bottom or tread surface to the top. In the use of such rubber heels, it follows that when the leather base is applied thereto, the breast of the leather base will project slightly beyond the upper edge of the rubber heel, due to the in cline of the breast referred to. This necessitates a breasting operation to make the breast side of the leather base coincide with that of the rubber heel. This is an extra operation, and it is desirable to avoid the same if possible in order to reduce the cost of manufacture.

To overcome this objection, I have conceived the ideaof inserting the rubber heels in the container in an inclined position, that is, with the breast side of the rubberheel lower than the back or. rounded side, "so as to bring the breast side of the rubber heel substantially parallel with the breast wall of the container. This, of course, results in positioning the upper edge of the breast of the rubber heel nearer to the breast wall of the container than would be the case when the rubber heel occupies a horizontal position. The leather base is likewise inserted in a container and positioned on top of the rubber heel in a similar inclined position, with the result that the lower edge of its breast is thrown inward. The degree of inclin'ation is regulated, so that when, the leather base is placed in position on the rubber heel, the lower edge of the breast of the leather base will be flush with the upper edge of the breast of the rubber heel. In

this way, I obviate the necessity of breast-- ing the leather base to cause it to be flush with the breast of the rubberheel.

While this operation necessarily resides in forcing the rear or rounded side of the leather base beyond the corresponding side of the rubber heel, this is not an objection, as this occurs normally when the rubber heel and leather base are inserted in a horizontal position in the container, and the rounded side or back of the leather base must, therefore, be trimmed off in any event. Thus, no extra operation'is involved, and the breasting operation, as stated, is avoided.

The desired incline to the rubber heel and leather base is produced by employing a plunger having its operativeface, or that com ng in contact with the upper surface of the leather base, inclined to the required de gree, so that when it is lowered to force the heel blank into the container, the initial heel blank will be given the desired inclination, and thereafter, as each rubber heel and leather base is inserted in the container on top of a preceding heel blank, it will rest in the container at such inclined position, and the plunger will then simply operate to force the composite heel blank downward in the container. Of course, the pressure of Cir the plunger and the resistance oiiered to the movement of the heel blanks by the con tainer will insure that each heel blank will be forced to exactly the same inclination by the incline of the plungeneven though they only approximated such position when inserted by hand in the container.

In order that my invention may be clearly understood, I have illustrated diagrammatically in the accompanyingdrawing the relative positions of the leather base and rubber heel at the breast when the same are as sembled in horizontal position in the con tainer, andthe.changeellected in their relative position by causing the parts to be givenfan inclined position. w

Figure 1 shows, diagrammatically, the upper portion or a container with a composite heel blank therein in a horizontal position, and showing the elf-set at the breast of the heel blank caused by the projection o1 the leather base beyond the upper edge of the breast of the rubber heel; and

Figure 2 sh'ows, diagrammatically, the same parts as illustrated in Figure l, but with the plunger having an inclined face or bottom, and composite heelblanks forced to an inclined position therein by the plunger, with the lower edge of the breast of the l'eather base flush with the upper edge of the breast of the rubber heel.

In Figure '1, the numeral 1 indicates a container, 2, a rubber heel in'serted therein, and 3, a leather base placed on top of the rubber heel with theinterpo'sition of paste. The numeral 4 indicatesa plunger for forcing the leather base and rubber heel downward in the container, v c The standard rubber heel employed has its breast 5 inclined rearwardly, as shown, with the result that the leather base forms an oil-set or projection at the breast of the composite heel blank, as indicated at 6. If assembled in the manner shown in Figure 1, this cit-set 'must be cut oil by the process of bi-casting before the heel blank can be secured to the shoe.

In Figure 2, the plunger 7 is pro ided with an inclined bottonrS, and when the rubber heel and leather base are inserted in the container, and the plunger lowered, the heel blank will be caused to assume the inclined position shown, bringing the lower edge of the breast of the leather base flush with the upper edge of the breast of the rubber heel, as indicated at 9. Thereafter, as each rubber lieeliand leather base are inserted in the container, they will assume a corresponding inclined position and will be forced downward in the container at such incline, by reason of the inclined bottom 8 or the plunger 7, The plunger 8 will be "adjuste'd'to any desired incline according to the incline of the breast of the rubber heel employed, and for the sake of illustration I have shown a conventional adjustable connection at 10.

I claim:

1. The method or uniting the members of a ccn'iposite heel-blank of leather and rubbar, in which the breast of the rubber heel inclines rearrmrdly, which comprises pasting a leather base and a rubber heel together within a container, the walls of which are engaged by the edges o'fsaid members while maintaining the members at such inclination as to bring-the upper edge or the breast or the rubber heel substantially flush with the lower edge of the breast of the leather base. v

2. The method or uniting the members of a composite heel-blank of leather and rubber, in which the breast of the rubber heel inclines rearwardly, which comprises pasting a leather base and a rubber heel together within a container, the walls or which areengaged by the edges of said members, and exerting pressure on the heelblank while maintaining the same at such inclination as to bring the upper edge of the breast of the rubber heel substantially flush with the lower edge of the breast of the leather base. I

3. The method of uniting the members of a composite heel-blank of leather and rubber, in which the breast of the rubber heel inclines rearwar'dly and'the breast of the leather base is perpendicular to the surface to be pasted, which comprises pasting a leather base and a rubber heel together with in a container, the walls of which are engaged by the edges of said members and forcing them downward in a container while maintaining the unitedparts at an inclination sufiicient to substantially true the breast or the rubber heel with the wall of the container. v

l. The method of uniting the members of a composite heel-blank leather and rubber, in which the breast of the rubber heel inclines rearwardly and the breast of the leather base is perpendicular to the surface to be pasted, which comprises pasting a leather base and a rubber heeel together within a container, the walls of which are engaged by the edges of said ncinbers and forcing them downward in a container by the use of a pressure member having its operative race inclined to such a degree as to force the heel-blank to a position in which the breast of the rubber heel will be substantially parallel with the wall of the container.

5. The method of forming composite heel-blanks of leather and rubber, in which the breast of the rubber heels employed "incline rearwardly and the breast of the leather base is perpendicular to the surface to be pasted, which comprises pasting a leather base and a rubber heel together in blanks, as thus formed, downward in the a container the Walls of which are engaged container by the use of a pressure member 10 by the edges of said members While mainhaving its operative face inclined to the taining the united parts at an inclination degree required to true the meeting breast sufficient to bring th u p r dg f th edges of the rubber heel and leather base. breast of the rubber heel substantially flush I11 nI) w f I have hereunto With the lower edge of the breast of the y handleather base, and successively forcing heel- DENNIS PARKS.

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