US1945823A - Buffer pad - Google Patents

Description

Feb. .6, 1934.

w. a AscH ET AL BUFFER PAD Filed Dec. 17. 1931 2 Sheets-Sheet l INVENTOR-S Feb. 6, 1934.

AT ORNEv Patented .Feb. 6, 1934 UNITED STATES PATENT OFFICE BUFFER PAD of Wisconsin Application December 17, 1931 I Serial No. 581,547

4 Claim.

This invention relates tora polishing or surfacing pad for use in polishing, bufling or finishing surfaces, such asthe bodies of automobiles, or the like.

In applying a lacquer or other coating to the surface of an automobile body or similar machines or other articles, the surface is first primed and 'then asurfacer or filler is applied. The surface being coated must then be abraded to remove pits and some portion of the coating to render the same smooth and adapt it to receive the finishing coats which, after being applied, are also smoothed down or finished by rubbing or polishing with a pad of appropriate softness. With prior practices and devices these operations have involved the expenditure of a great deal of laborious effort and have required quite a bit of time The object of the present invention is to provide novel pad or buffer structures which are adapted to so eficiently carry out these operations as to greatly reduce the time required and eliminate the necessity of expending laborious and fatiguing effort.

Another important object of the invention is to provide polishing or bufiing pads-having these desirable characteristics and which are also simple and durable in construction, and adapted to be manufactured conveniently and economically.

Other objects and advantages reside in certain novel features, of the construction, arrangement and combination of parts which will be hereinafter more fully described and particularly pointed out in the appended claims, reference being had to the accompanying drawings forming a part of this specification, and in which:

Figure 1 is a plan view of one type of polishing pad embodying the present invention;

Figures 2 and 3 t are similar views showing slightly different types of polishing pads embodying the invention;

Figure 4 is a view in transverse section taken on line 4-4 of Figure 1;

Figure 5 is a fragmentary view partly in section and partly in perspective illustrating the first step in the manufacture of a pad embodying the present invention; and

Figure 6 is a similar view showing the second step in the process of constructing a pad.

In producing a pad embodying the present invention, a layer of fabric designated at 1 and which may be the so-called osnaburg, that is, a fabric similar to heavy and closely woven burlap, has layers 2, 3, each consisting of a mixture of wool and hair applied to the opposite sides of the layer. The layers 2 and 3 are then thoroughly and completely needled or punched through the fabric stay 1. After this operation is completed, the resulting structure is doubled upon itself as indicated in Figure 6, and between 39 the folded portions of the doubled structure a second fabric stay 4 is interposed. The fabric stay 4 is similar to the fabric stay 1. The structure as shown in Figure 6, that is, doubled upon itself, is then again subjected to a needling operation to project or punch the wool and hair fibers throughthe central stay4 and to thoroughly interlace and interlock the fibers of the several layers with the several stays. After this operation has been completed, the resulting structure, which is of considerable size, is cut into circular pads, such as shown at P in Figure 1, and the periphery of the pad structure is strengthened by lines of stitching S. The central portion of the pad has a hole H punched therein and around the hole H the pad is strengthened by lines of stitching S. The pad shown in Figure 2 is constructed in exactly the same manner as the pad shown in Figure 1 with the exception that the entire outer surface of the pad is coated with a layer of grits such as emery, carborundum or sand. A portion of such coating is shown at C but it is to be understood that the entire surface of the pad is coated in the manner indicated at C.

The pad shown in Figure 3 is designated at P w and is also similar to the pad shown in Figure 1, with the exception that in addition to the wool and hair, particles of steel wool are embodied in the structure of the pad, these particles being indicated at W. p

The pad illustrated in Figure 3 presents an abrasive surface which is well adapted to. cut or abrade away pits and a portion of the surfacer or filler applied to an automobile body or the like. For the same purpose the pad shown in Figure 2 may be employed. In polishing or rubbing down the finishing coat the pad shown in Figure 1 is employed. The pad shown in Figure 1 is also adapted for use in simonizing or polishing automobile bodies.

It is to be understood that the pads of Figures 1, 2 and 3 are applied and secured in any suitable manner to the rotating head of a suitable machine or tool and that the operator, in using the pads, applies the rotating surface thereof to the workand while so applied moves the pad. back and forth across the work.

Pads constructed in accordance with the present invention are not only highly eflicient in operation but are extremely durable.

layers of fibers needled to at least one intervening fabric stay, and lines of stitching reinforcing at least the periphery of the pad.

2. A polishing pad consisting of two layers of fibers needled to an intervening stay and doubled upon each other and needled to a second stay in termediate the doubled portions.

3. As an article of manufacture, material for use in forming polishing, bufiing, or-similar pads consisting of a plurality of layers of fibers needled to at least one intervening fabric stay and steel wool particles in one surface at least of the fabric.

4. As an article of manufacture, a fabric consisting of two layers of fibers needled to an intervening stay and doubled upon each other and needled to a second stay intermediate the doubled portions, one surface at least of said fabric having abrading material associated therewith.

WILLIAM G. RASCH. JAMES A. MALCOLM.

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