US2226625A - Buffing or polishing wheel - Google Patents

Description

Dec. 31, 1940- w MacFARLAND ETAL 2,226,625

BUFFING OR POLISHING WHEEL I Filed Nov. 28, 1959 2 Sheets-Sheet 1 INVENTORS Laurens W. ManFavland 5g ATTORNEY Dec. 31; 1940. L w MacFARLAND ETAL. 2,226,625

BUFFING OR POLISHING Wf'IEEL I Filed Nov. 28, 1939 2 Sheets-Sheet 2 INVEN1"OR5 LauvQnsWMacFavland 5g irapggn Kru qluff WATTORNEY Patented Dec 31, 1940 AT NT OFFICE BUFFING R POLISHING WHEEL Laurens W. MacFarland, Old Greenwich, Connz, and Stephen Krugiofl, New York, N. Y.; said Krugloi! minor to said MacFarland Application November 28, 1939, Serial No. 306,479

'13 Claims.

This invention relates to bufllng or polishing wheels and more particularly to wheels of the type in which annular buiiing sections consist of segments of cloth or other bufllng material and are assembled together in a circumferential series to form the buiiing surface.

One object of our invention is to provide an improved construction of bufiing wheel adapted to utilize relatively small discs or pieces of bufiing material that may be obtained by cutting the centers from larger discs in the manufacture of bufiing wheels having large central openings, or may consist of bumng discs that have been used and have been worn down to such small dimensions that they can no longer be efiiciently employed.

Another object of our invention is to provide an improved construction of the bufling segments and of the means for connecting same to an anchoring or retaining ring or member forming the inner periphery of the annular section.

With these and other objects in view, our in vention consists in the novel construction and arrangement of parts hereinafter described, illus- 25 trated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form and constructional details may be made without departing from the spirit of the invention or sacrificing any of the advantages thereof.

In the drawings:

Fig. 1 is a side view showing one form of the improved buff segment ready for assembly;

Fig. 2 shows the same segment in combination with portions of adjacent segments;

Fig. 3 is a side view showing a portion of an annular bufiing section;

Fig. 4 is a detail cross-section showing the connection between adjacent segments;

49 Fig. 5 is a detail cross-section through the retaining ring and the bufiing material;

Figs. 6 to 9 inclusive show a modified form of the invention, Fig. 6 being a view showing a flat blank of modified form; Fig. 7 showing two ad- 5 jacent segments of this modified-form; F 8. 8 showing a side view of part of a buiflng section comprising the segments of Figs. 6 and '1; and

- Fig. 9 showing a modified form of the arrangement of Fig. 8.

Referring to Figs. 1 to 4, a plurality of piles of fabric or other material ll of round, oval, or other like shape, are superimposed upon each other and are punched with perforations ll after which the multi-ply blank I2 is folded along a center line passing through the perforations Ii,

and a cord, wire, or the like I3 is passed inwardly through one of the perforations II and outwardly through the other as shown at Fig. 1. The folded edge l4 extending from periphery of the blank I! to the adjacent perforation II is con- 5 nected to the corresponding edge of a similar blank I! by a line of stitching l5 as shown at Fig. 4, and the cord or wire i3 passes-es shown at Fig. 2through the perforations I l of the adjacent blanks. The said member I3 has its free 10 ends connected to ether and the segments l2 are mounted in an endless series upon a ring or supporting member i6 of any suitable or well-known type; and in the arrangement shown we employ a retaining ring of the known type comprising 15 pointed teeth I! adapted to penetrate the buii'ing material and the teeth on one side being arranged in staggered relation to the teeth on the other, as shown at Fig. 5, so that the inner periphery of the bumng section is securely an- 20 chored in a. metallic retaining ring that may be conveniently mounted and centered in the bufiing wheel.

As the blanks i2 are assembled to form the annular bufiing section, the blank ends are puckered or bunched together as the edges ll extend outwardly in a direction radially oi the bufiing section as indicated by the lines l8 in Fig. 3, and it should be noted that this formation results from the action of centrifugal force as the buff is used, and while we prefer to stitch adjacent sections together as shown at Fig. 4, such stitching is not always necessary. In accordance with-the modification shown at Figs. 6 to 9, inclusive, a plurality of multi-ply blanks IQ of buffing material, 0! round, oval, or like shape, or of the angular and arcuate formation shown, are formed with central apertures 20 through which they are folded along the line 26, Fig. 6, and through which a retaining cord or wire 2| is passed. The 40 folded blanks l9 extend into each other and the free ends of the retaining member 2| are connected together (as at 28, Fig. 9) and the buiiing annulus thus formed is retained by a suitable member such as the retaining ring i6 Fig. 8, and annular or spiral rows of stitching 22 may be provided so as to connect the free corners. 23 of the blanks l9 to the enclosing material of the adiacent blanks. a

In the modified form of annular section shown at Fig. 9 the arrangement is similar to that of Fig. 8, except that the rows of stitching 22 are omitted, with the result that the free ends or cornet: 23 of the blanks I! move outward under centrifugal force when the but! is in use, and the 5g material is thus bunched or shirred at 24, thereby forming portions that are of greater bulk or thickiness in an axial direction, and in assembling the annular buif sections for use in a sectionalbuffing wheel the sections may be so disposed that the thickened portions formed by the bunchings at 24 in adjacent sections are in staggered relation, in order to give substantial uniformity in the distribution of the buffing material in the peripheral surface of the sectional wheel.

The ends of the retaining cords or wires l3 and 2| may be connected together by knotting, as at 25, Fig. 3, and, Fig. 9, or in other suitable manner so that they serve as annular cores enclosed in the inner periphery of the buffing sections; and the retaining rings i8 and/or said cores may be dispensed with in certain cases and the inner periphery of the annular section may be reinforced by sewing or by cementing, or in other suitable or well-known manner.

Although the drawings and the above specification disclose the best modes in which ,we have contemplated embodying our invention, we desire to be in no way limited to the details of such disclosure, for in the further practical application of our invention many changes in form and construction and in minor details may be made as circumstances require or experience suggests without departing from the spirit of the invention within the scope of the appended claims.

What we claim is:

1. In a bufllng wheel, a plurality of folded segments disposed in an endless series forming an annular bufling element with a substantial portion of the fold in each segment extending along the inner periphery of said annular element and another substantial portion of said fold extending outwardly from said inner periphery.

2. In a bufling wheel, a plurality of buffing segments each comprising a multi-ply blank, perforations in the blanks, folds extending through the perforations, a flexible retaining member extending along a portion of the fold in each blank and extending through a perforation in each blank to form an annular buff with a portion of each fold disposed in its inner periphery and an other portion of the same fold extending outwardly from the said inner periphery.

3. In a buffing wheel, a plurality of bufling segments each comprising a multi-ply substantially round blank, perforations in the blanks, folds extending through the perforations, a flexible retaining core member extending along a portion of the fold in each blank and through a perforation in each blank, means for connecting the ends of the flexible member to form the blanks into an annular bufl withaportion of each folddisposed in its inner periphery and another portion of the same fold extending outwardly from the said inner periphery, and annular means reinforcing the inner periphery of the annular buff.

4. In abufling wheel, an annular bufling section comprising a plurality of folded multi-ply blanks of bufling material, perforations in the blanks, a

ring-shaped retaining core passed through at extending outwardly from said retaining means.

5. In a buffing wheel, an annular buffing section comprising a plurality of multi-ply blanks of bufllng material, perforations in'the blanks,

folds extending through the perforations a flexible retaining core member passed through at least one perforation in each blank to engage a portion ofthe fold in the blank and form a chain of blanks constituting an endless series, and a metallic clamping ring for retaining the portions of the blanks forming the inner periphery of the annular bufling section, the other portions of the said fold extending radially outwards from said clamping ring.

6. In a buffing wheel, a plurality of bumng segments each comprising a plurality of plies of flexible material superimposed upon each other and having central folds extending from edge to edge thereof, at least one perforation through each fold, a flexible retaining core extending along a substantial part of each fold and through a per-' foration in each segment, the remaining part of each fold being free to turn outwardly in a radial direction due to centrifugal force.

7. In an annular bufilng section, a'bufling segment comprising folded multi-ply material with free edges of arcuate form, at least one perforation in the fold, a flexible retaining core extending through the perforations in the segments and having its ends connected to assemble the segments in an endless chain, and means for enclosing the said flexible core and theentire inner periphery of the bufflng section;

8. In an annular bumng section, a plurality of buffing segments each comprising a folded blank, two spaced perforations in the fold of each blank, a flexible retaining core threaded through all the perforations in the blanks, and means for connecting the ends of said flexible member to assemble the blanks in the form of an endless chain with the fold portion between each perforation and the blank edge extending outwardly from said core to the outer periphery of the segment.

9. In an annular bufilng section, a plurality of bufling segments each comprising a folded blank with edges of arcuate form, two spaced perforations in the fold of each blank, a retaining core passed through the perforations in the blanks, means for connecting the ends of said flexible core to assemble the blanks in the form of an endless chain, and a retaining member clamping the center part of the fold in each blank at the inner periphery of the annular section.

10. In an annular buffing section, a plurality of bufling segments each comprising'a folded multiply blank, two perforations in the fold of each blank, a flexible member extending through the said perforations to retain in the inner periphery of the annular section the portion of the fold between the perforations in each blank, and means for connecting the remaining portions of each fold with the corresponding fold portions in the next adjacent segments.

11. In an annular bufiing section, a plurality of bufiing segments each comprising a centrally perforated, angular, and arcuate blank, a fold extending through said central perforation, and a flexible core member extending through all the said perforations to assemble the segments in overlapping relation in an endless chain.

12. In an annular buffing section, a plurality of bufllng segments each comprising a centrally perforated blank, a fold extending through said central perforation, a flexible core member extending through all the said perforations and extending along one half of the fold in each blank to assemble the segments in an endless chain, and a clamping ring enclosing said core member and 2,228,625 3 forming the inner periphery of the annular secless chain, one end of each blank being disposed tints r within the told of the blank next adjacent thereto,

13-. In a bumng'section, a plurality of bumng and means for anchoring the said blank ends besegments, each comprisinz a centrally perforated, tween the material 01 adjacent blanks.

5 multi-ply blank, a flexible retaining core extending through the central perforations or the blanks n. w. men-mam). and assembling the blanks in the form of an enda STEPHEN KRUGIDFF.

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