US2419858A - Sanding drum - Google Patents

Description

G. V. TABER April 29, 1947.

SANDING DRUM Filed July 24, 194 5 Wi /W?- FIG. 2

IN VEN TOR.

G. V. TABER Patented Apr. 29, 1947 UNITED STATES PATENT OFFICE The present invention relates to improvements in sanding drums or rollers and concerns more particularly improvements in the means for holding the emery cloth in place on the drum. Among the objects of this invention are the provision of improved means for gripping the ends of the emery cloth and holding the same against detachment from the metal drum upon which it is mounted; the provision of a sanding drum of such a construction that the work of assembly thereof, during the manufacturing process, will be reduced to a minimum; the provision of a sanding drum such that the fabrication thereof will be inexpensive, so that the drum may be sold for a moderate price; and such further objects, advantages, and capabilities as will hereafter appear and as are inherent in the construction disclosed herein. My invention further resides in the combination, construction, and arrangement of parts illustrated in the accompanying drawings and, while I have shown therein what is now regarded as the preferred embodiment of this invention, I desire the same to be understood as i1- lustrative only and not to be interpreted in a limiting sense.

In the drawings annexed hereto and forming a part hereof, V

Fig. 1 represents an elevation of a sanding drum constructed in accordance with my present invention;

Fig. 2 represents an edge elevation of the structure shown in Fig. 1;

Fig. 3 represents a transverse section substantially along the plane indicated by the line 3--3, Fig. 1;

Fig. 4 represents a section substantially along the plane indicated by the line 4-4, Fig. 1;

Fig. 5 represents a section substantially along the plane indicated by the line 5-5, Fig. 4; and

Fig. 6 represents an elevation comparable to the section shown in Fig. 5 but showing a slight modification of that structure.

Reference will now be made in greater detail to the annexed drawings for a more complete description of this invention. This drum comprises a flange I having a web 2 which is provided with a hub 3 for mounting the same upon a shaft of a suitable sanding machine. As is obvious, the hub should be provided with a screw-threaded hole 4 for the reception of a set screw whereby the wheel may be fixedly connected to the drive shaft upon which it is mounted. Lugs 5 are formed integral with the flange of the drum and have their outer surfaces substantially flush therewith. These lugs are provided with openings for the 4 Claims. (Cl. 51-494) reception of Allen screws 6 which extend into sleeves I on which are molded rubber sleeves 8, the function of which is to engage and hold the emery cloth 9, which is to do the sanding, on the flange I.

In mounting the emery cloth upon the wheel, it is put about the flange thereof and the ends are brought together and tucked into the slot formed in the flange by cutting therethrough in any suitable manner, as, for example, with a circular hack saw. With these ends in contact with the rubber rollers, a suitable wrench is placed inside of the opening in one of the Allen screws and then turned in a direction to cause the emery cloth to be drawn in between the rubber rollers and tightened about the periphery of the drum. The wrench cannot be used in the right hand one of the screws shownin Fig. 1 for the reason that, to turn the emery cloth in, it is necessary to turn the screw in a counterclockwise direction, which would not result in the roller 1, 8 being turned but would result in the screw being turned out of the roller. On the other hand, when the wrench is placed inthe left hand screw, turning in a clockwise direction causes the roller to be turned so that the emery cloth is tightened up. The drum can then be turned over and the wrench put into what is then the left hand screw and which corresponds to what was the right hand screw upon the opposite side. Now, turning this'screw in a clockwise direction tightens up the screw and causes it to act as a locking means to prevent loosening of the emery cloth.

Because of the added weight at one side of the drum, due to the lugs 5, the screws 6, and sleeves 1 and 8. it is necessary to make holes H and H in the web 2 of the casting so that the drum will be balanced about the axis of the hub 3, thus preventing undue bouncing of the sanding drum during high speed operation.

In the structure shown in Fig. 6, the openings in the lugs 5 are somewhat oval in shape so that they act as slots to permit the screws 6 and the sleeves carried thereby to move toward each other and outwardly so as to cause a greater pinching action on the emery cloth as it is tightened up around the drum. In Fig. 5, the rubber rollers are shown somewhat flattened where they pinch up against the emery cloth. This showing is somewhat exaggerated since they will not ordinarily press against each other to this extent.

Removal of the emery cloth for replacement with a new one is accomplished in just the reverse order to that given above for the application of the cloth.

Having now described my invention, I claim:

one screw and may be secured against rotation by another.

2. A structure for the purpose stated compr sing a pulley having a substantially smoothcylindrical surface, said pulley having a gap in itssurface for the admission of the ends of a sanding strip, lugs within the periphery of said pulley and serving as mounting means for screws, scre ex endi through said lugs from-opposite sides of said pulley and in alignment with each other, metal sleeves betweensaidilugs into which the screws are screwed, and rubber sleeves surrounding said metal sleeves and extending substantially into engagement within the pulley in the path of the ends of a sanding strip-inserted intothe gap in the pulley surface, the gapin the pulley surface being of a length to permit use of a sanding strip of a width'equal to the length of the-pulley, one of saidscrews extending into a sleeve from one side of the pulley and serving as means for rotating the sleeve to tighten the Sanding strip about the pulley, and the screw extending into saidsleeve from the opposite side of the-pulley acting as a lockingmeans'to prevent inadvertent loosening ofthe strip.

3. A sanding wheel comprising an exteriorly smooth surfaced pulley having intermediate the endsofthe pulley a transverse Web equippedwith anaxial hub, one end of which extends beyond the plane ofthat' end of the pulley, pairs of closely adjacent lugs at the two ends of the pulley, the lugs extending inwardly toward the hub from the pulley rim and opposite lugs having aligned openings, internally threaded metal sleeves between oppositelugs, the openings in the lugs being in alignment with the openings of the sleeves, screws extending through saidlugs and into said sleeves from'opposite directions, one screw in one of said sleeves serving to draw a sleeves.

4. A sanding wheel comprising a pulley having a 'supporting web and an exteriorly smooth surfaced flange extending perpendicularly to the Web; said web having an axially extending hub and an aperture adjacent the flange, the flange having a slot from edge to edge thereof extending into said aperture, in combination with pairs of lugs extending inwardly from the edges of the flange closely adjacent the slot, sleeved gripping rollersrparallelwith the-slot and locatedbetween pairs-0t lugs, and screws extending through the lugs-from opposite faces ofthe pulley and axially intothe sleeves, said screws and rollers serving as means for drawing strips of sandingmaterlal through the slot,v and one of said screws serving as securing means whereby reverse movement of the sanding material in the slot may be prevented.

GENEV. 'I-ABER.

REFERENCES CITED The following references are of record in the

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