Патент USA US2104925код для вставки
Jan. 11, 1938. R. A. GOODMAN 2,104,925 BUFFING WHEEL AND PROCESS OF MAKING SAME Filed March 14, 1956 2 Sheets-Sheet l \\\ 2 \ \ \ \ /2 „@Íäby ATTORNEY Jan- 11, 1938. R. A. GOODMAN 2,104,925 BUFFING WHEEL AND PROCESS OF MAKING SAME Filed March 14, 1956 _2 Sheets-Sheet 2 fw., 0.o INVENTOR /Q/sssu Ä. 5am/MN BY ATTORNEY 2,104,925 Patented Jan. 11, 1938 i f UNirfl-:fo STATES PATENT OFFICE VRussell A.„Goodman, Cleveland, Ohio Application March 14, 1936, Serial No. 68,912 1 Claim. The'present‘invention relates to the manufac -ture of bufting` wheels such as used in buiiing, polishing and coloring articles, and has as its ob jectfa! new and improved method of making bulîs and also an improved construction of the buff. The usual type of buff is made from a plurality of plies of cloth which are laid upon one another with the threads running in varied directions and from which are cut circular blanks with a cen tral shaft opening. These blanks are sewed, usu ally with a coarse spiral stitch, and- are then ready to be mounted as units in a complete buff the excessive thickness at the seams is avoided; and Fig. 10 is an edge view of the device shown in Fig. 9. In the manufacture of the improved buffs, a > This method of making buffs is expensive and are laid up in along strip on a table or bench. wasteful, both in the manufacture of the buff and also in operation. One of the main objections to this form of buff is that only a portion of the laying the material, the pieces composing the lay . wheel can be used and the center is waste which has a small salvage value. In the use of bufiing 20 wheels, the speedof rotation is very high and as the buff wears away the surface speed is reduced to a point when it is no longer profitable to use it. To avoid this, the wheel is discarded when it is partially worn away, with the consequent loss of the center. _ Other methods of making circular buffs have been proposed and some have gone into limited use. The method most commonly used is that which has been described, as it has heretofore 30 been considered the most economical and efficient method. The present invention has for its object a method- of making a buff which will obviate the loss of material and will give a buif in which substantially all of the cloth may be usefully em ployed. It is a further object to devise a method of making buffs by which waste will be obviated in the manufacture of the wheel. The accompanying drawings illustrate the 40 method which has been found to be the most sat isfactory for the purposes specified, and while the drawings and description are fully detailed in order to explain the best known method and the preferred construction, it will be understood that 45 the same are subject to modification and im provement within the scope of the invention. In the drawings: Fig. 1 represents a plurality of layers of cloth laid up for cutting and illustrating a method of 55 Fig. 6 shows a cross-section of a unit illustrat ing a-method of `clamping the ring to a holder; Ul Fig. 7 is a detail on the line 'l-l of Fig. 5; Fig. 8 is a complete wheel; Fig. 9 is a modified form of assembly by which plurality of plies of material, usually cotton cloth, ing wheel. 50 illustrating the-method by which the ring is first made roughly and then cut to form; cutting the material; In ers are usually placed in such manner that the threads in the several layers are at angles to each other. Any number of plies l may be laid up, the drawings illustrating twelve plies merely by way of illustration. In the generally accepted method of manu facture, the material is now cut into roughly circular disks or blanks in which a central shaft opening is cut. This method is wasteful of ma terial and labor. By my process, the plies are cut into sector shaped blocks, preferably of gen eral trapezoidal or keystone shape, along the lines 2 and 3 in the manner illustrated in Figure 1. By arranging the blocks alternately as shown, the waste is minimized. The size and shape of the blocks A are determined by the size of the finished wheel or ring and the size of the open ing which is to be left in the center. The illus tration of the cuts in Figure 1 is merely to show one manner of cutting as the arrangement may be changed and the number of blocks will vary with the size and dimensions of the completed ring. The blocks 4 are preferably sewed at this time, either longitudinally as shown at 5 in Figure 3 40 or transversely as shown at 6 in Figure 4. The requisite number of blocks are then assembled into polygonal form with the inclined edges in contact. If the edges are overlapped as shown in Figure 5, the overlapping 'edges can be sewed as shown at 8 in Figure 7. After the ring of blocks is assembled its outer edge is trimmed to circular form along the line 9 and any suitable form of clamp or holder is attached to the center. A metal crimping ring l0 is shown for the pur 50 Fig. 2 is a section on the line 2_2 of Fig. l; Figs. 3 and 4_- are views illustrating the blocks or blanks which are cut from the original cloth, pose, but this is only illustrative. showing two methods of stitching; large central opening without undue waste of material. The ring so secured is operable with 55 Fig. 5 is a buif wheel made up from the blanks By this method of procedure, it is possible to construct a ring-shaped buñ'ing wheel with a 2 2,104,925 out the usual waste for it is possible to so dimen sion the parts that when the wheel shall have worn down to its limit of usefulness, only a small ring of fabric will be left. In addition, the buff wheel will be cooler than the ordinary type with a small shaft opening. In a buiît` wheel oi say 14 inches in outside diameter, it is possible to have a full 6-inch opening at the center. 'll‘hese 10 figures are given by Way of example only. A number of these buiî units, which are in dicated by the numeral l2, are usually mounted laps accordingly. These views also illustrate an optional form of sewing in which the entire disk is given the usual spiral sewing. If desired outer plies I6 may be added to either formof buff sec tion to cover the surfaces of the section. El It is obvious that modiñcations and changes may be made in the procedure of manufacture and the construction of the ñm‘shed wheel, the invention being characterized by the fact that the buff wheel units are made from substantially . .4 trapezoidal or keystone shaped blocks assembled upon a shaft I3, as shown in Figure 8, any suit-V in ring form with the large central opening giv able form of chuck being employed for this pur ing maximum use of the fabric and also the addi pose. In this view the Wheel is broken away to tional cooling eiîect. show the spacing of the disk units about the What is claimed is: shaft. The side plates I5 may be apertured to A ring-shaped buiic wheel having a large cen permit the circulation of air through the center tral opening substantially equivalent to the waste of the wheel. area at the center‘of a standard buif wheel, said In orderjto avoid the thick overlap shown in ring being composed of a plurality of trapezoidal Figure 7, where the blocks of full thickness are blocks of multi-ply fabric sewed together and spliced, it is possible to make the individual blocks assembled with their inclined edges in over somewhat thinner and to stagger the seams as shown in Figures 9 and 10. This system may be extended to any desired extent to reduce the over lapped sewed relation and with their smaller parallel sides defining the large central opening. . RUSSELL A. GOODMAN.