US3008277A

US3008277A - Rotary buff

Info

Publication number: US3008277A
Application number: US860951A
Authority: US
Inventors: Schloss Morris
Original assignee: Individual
Current assignee: Individual
Priority date: 1959-12-21
Filing date: 1959-12-21
Publication date: 1961-11-14
Anticipated expiration: 1978-11-14

Description

M. SCHLOSS Nov. 14, 1961 ROTARY BUFF 3 Sheets-Sheet 1 Filed Dec. 21, 1959 I INVENTOR MW 5hLon4 TTORNE 5 M. SCHLOSS Nov. 14, 1961 ROTARY BU 3 Sheets-Sheet 2 Filed Dec. 21, 1959 INVENTOR O'UUA M SchloM ATTORNEYS M. SCHLOSS Nov. 14, 1961 ROTARY BUFF 3 Sheets-Sheet 3 Filed Dec. 21. 1959 INVENTOR MORRIS SCI- LOSS ORNEY United States Patent 3,008,277 ROTARY BUFF Morris Schloss, 2375 Marion Ave., Bronx 57, N.Y. Filed Dec. 21, 1959, Ser. No. 860,951 9 Claims. (Cl. 51-193) This invention relates to rotary buffs and relates particularly to rotary buffs comprising a plurality of radially extending fabric plies presenting adjacent peripheral butting edges, the plies being secured to suitable mounting means whereby the plies may be firmly held and the bud may be mounted for rotation with a power driven shaft.

It is a principal object of this invention to provide improved means for mounting and holding in secured relation the individual plies comprised in a rotary buff.

A more particular object of this invention is to provide means for mounting and securing plies of a rotary bulf whereby the plies may be more securely held and more effectively prevented fromrworking loose due to the centrifugal force imposed thereon during high-speed operation. Accordingly a further object of this invention is theprovision of a rotary buff capable of operation at higher speed than is possible in the case of a buif having a similar number of plies but utilizing conventional buif construction. a

A further object of this invention is to provide a buff construction whereby a substantial saving in fabric may be afforded without sacrifice as regards the wearing life and the number of plies presented by the peripheral surface of the buff. r

A further object of this invention is the provision of a butfconstruction whereby an increased number of plies may be provided as compared with the number of plies which has heretofore been regarded as practical using conventional bufi constructions.

A further object of this invention is to provide a buff wherein the thickness of the mounting means in relation to the thickness of the buff at the peripheral bufiing edges of the fabric plies may be substantially reduced. Accordingly further more particular objects of this invention are to provide an improved buif whereby in the case of multiple buif mounting a more compact buff assembly is possible and/or a lesser number of buff units is required as compared with conventional bulf constructions.

A further object of this invention is to provide a buif construction whereby selected directional characteristics of the warp and woof of bias cut fabric comprised in the plies may be readily selected and varied as desired for particular usage requirements. Accordingly further more particular objects of this invention are to provide a buff construction whereby utilizing bias cut fabric the warp is predominantly and preferably entirely in one direction as inclined from the radial.

A further object of this invention is to facilitate the steps employed in the manufacture of rotary buffs. Accordingly further more particular objects of this invention are to facilitate the manufacture of rotary buifs where the warp of bias cut fabric plies is predominantly and preferably entirely in one direction.

Features of this invention relate to the means whereby the plies are anchored and held in place, there being two securing means instead of one. One of the securing means holds one plurality or group of plies to a hublike support. The second securing means is spaced radially outwardly from the first and serves to secure a second plurality or group of plies to the first, the plies of the two pluralities or groups being successively intermingled with each other. Further features of the invention relate to the securement by the second securing means of bias cut plies-predominantly or entirely of bias 3,008,277 Patented Nov. 14, 1961 ice cut plies wherein the warp is predominantly or entirely in one direction. Other features relate to the employment of the plies secured by the second securing means as the plies which present the bulfing surface in the finished bulf, some or all of the plies held by the first securing means being employed solely to provide second securing means for the plies held thereby.

Further objects, features and advantages of this invention will be apparent from the following description of a typical embodiment of this invention and of the practice thereof which is described hereinbelow for purposes of illustration in connection with the accompanying drawings, wherein: p

FIG. 1 is a side elevation of a rotary buff embodying this invention;

FIG. 2 is a perspective view of plies of fabric as disposed at an initial stage in the manufacture of the buff;

FIG. 3 is a section taken on the line 33 of FIG. 2;

FIG. 4 is a perspective view on a smaller scale showing the fabric assembly of FIGS. 2 and 3 after having been formed into a spiral winding;

FIG. 5 is a section of the spiral winding shown in FIG. 4 after having been partially centrally constricted or gathered in producing the finished buif, the ply assemblies being separated from each other for clarity;

FIG. 6 is a section taken on the line 6-6 of FIG. 1 showing on a larger scale the disposition of the plies in the finished buff in the region of the securing means therefor; 1

FIG. 7 is an elevation, largely in section, which illustrates the mounting of a plurality of bulfs embodying this invention for rotation with a driven shaft;

FIG. 8 is similar to FIG. 7, but on a smaller scale, showingconventional buffs mounted alongside the applicants improved buffs; 7

FIG. 9 is a perspective view of plies of fabric for an alternative preferred buff construction as disposed at an initial stage in the manufacture of the buff;

FIG. 10 is a perspective view of the fabric plies of FIG. 9 in a partially folded relation to show the disposition of warp and woof in the bias cut fabric plies;

FIG. 11 is a face elevation of a portion of a rotary bulf fabricated utilizing the plies shown in FIGS. 9 and 10, some of the plies being cut away to show the disposition of the warp and woof in the underlying plies; and

FIG. 12 is a plan view of a band of bias cut fabric showing the foldline about which such fabric is folded in conventional bulf manufacture.

In the exemplary embodiment shown in the drawings, the buff comprises twenty-four radially extending fabric plies in immediately adjacent relation to each other, the peripheral buffing edges lying side by side so as to present a bufiing surface of substantial width. A hub-shaped metallic mounting means 10 serves to anchor the plies of the buff and to provide means whereby the buff may be carried on a suitable rotatable support. While the mounting means 10 serves to anchor the plies of the buff, there are two separate securing means for the plies, the mounting means 10 serving to grip and secure a first plurality of plies 11 and a second plurality of plies 12 being secured to the plies 11 by securing means spaced'radially outwardly from the mounting means 10. In the embodiment shown the second securing means whereby the plies 12 are secured to the plies 11 is in the form of stitching 13. However, the plies 12 may besecured to the plies 11 by other securing means such as glue or integral weaving.

For purposes of illustration as indicated best in FIG. 6, the number of plies 11 in the first plurality of plies is eight and the number of plies 12 in the second plurality of plies is sixteen. The combined total of plies as aforesaid, is twenty-four; However, notwithstanding that the peripheral surface of the buff presents twenty-four ply edges, the metallic mounting means is of such size and structure as to accommodate only a total of eight plies. It is of advantage that the mounting member 10 is relatively small in thickness in relation to the number of plies presented about the periphery of the bull merely from the standpoint for a reduction in bulk. However, his also highly important that the prongs 14, which during manufacture are turned inwardly to bite into the fabric plies, can be readily made to penetrate sufiiciently to provide a positive grip with all of the plies. Thus there is a positive anchoring of all plies 11 of the first plurality of plies andthe plies 12 likewise are each positively secured adjacent their inner margins. The result is that a far greater number of plies can be gathered and securely anchored than is possible in conventional butts and thatuse at extremely high speeds is made possible without risk of any of theplies working loose and flying outwardly under the influence of centrifugal force. In conventional buff construction all of the plies are secured to a common securing means and, if, for example, the mounting means used is of the general type disclosed herein as the mounting-means 10, the prongs 14 cannot be caused to directly bite into more than a limited number of fabric plies. Moreover, if othersecuring means is resorted to such as stitching with a metallic wire or stapling, similar limiting factors are encountered. In conventional rotary buffs, therefore, the upper limit for plies has been of the 'order of sixteen to eighteen plies. However, even when only sixteen to eighteen plies are 'used the innermost plies generally are not subjected to any positive contact with the prongs of the mounting means and are held merely by reason of the pressure exerted thereon by adjoining" plies. It is for this reason that the center plies tend to work loose during use and operating speeds greater than 'aboutlSOO rpm. are

regarded as impractical.

The improved bull? of this invention can be manufactured very simply, theoperational steps whereby the plies 4 FIG. 6. In FIG. 5 the fabric plies and strips are shown at a mid-point in the folding operation.

After the plies have been brought to the position shown in FIG. 6 each of the strips 11a becomes converted into a pair of plies 11 which are integrally joined at their inner diameters. Moreover, because of their having been produced by a continuous winding, the plies 11 occur in nested pairs disposed in a spiral winding. Moreover, be cause the plies 11 are interconnected they are in helical form in the completed buff.

After the central portion of the spiral has been gathered into the general relationship shown in FIG. 6 the mounting means 11 is brought into position for engaging them and under high pressure the prongs 14 are bent inwardly so as to bite in and directly grip all of the plies 11.

In making a conventional buff from a continuous strip of bias cut fabric having, for example, a total of sixteen plies, it is necessary to form a spiral containing eight plies throughout the entire width of the spiral. It is a much. more diificult'operation to gather the central portion of the eight plies than that hereinabove described where'only four plies have to be centrally gathered while the margins in effect have stiffening means attached thereto afforded by the strips-12 whereby the fold occurs more naturally at the desired central gathering point and it is much easier to bring the plies into radially extending position- The fact that the gathering of the plies is made much easier facilitates production.

According to the specific example 'hereinabove described for purposes of exemplification wherein the strip 11a is 9 inches wide and the strips 12 attached thereto by stitching are 2% inches wide, the resulting buff is one wherein the maximum radial extent of the plies is substantially 4 /2 inches. The central portions of the strip 11a, which become the inner margins of the plies ll, serve no function other than an anchor for 'the working peripheral edges of the fabric plies presented by the buff, and for each ply 11 used for anchoring to the mounting means 10 there are two or more additional plies which have full utility for buffingin that they extend substantially from the periphery of the buff as newly manufactured down to adjacent the mounting means 10. Because of this construction a very substantial saving in fabric is made possible. ,Thus when there are two or moreof the plies 12 for each of the plies 1 1 the fabric saving is of the order of 35% or more, as compared with the fabric utilized in a conventional butt of the cut" so that the periphery of the fabric plies presents the ends of both the warp and woof., In preparing the fabric for making the plies of the buff, it has been common practice to take fabric produced from the mill which is about 40 inches wide and cut bias lengths therefrom about 27 inches or more iu width, these ends being attached together endwise toproduce a continuous strip of bias cut fabric. This strip in turn may be cut into narrower widths and in FIG. 2 the fabric strip 11a, which in the finished buifconstitutes a pair of plies 11, may, for

example, be 9 inches wide. The strips or plies 12, which likewise are bias cut, may, for example, be 2% inches shown in FIGS. 2 and 3,.this strip may be coiled into spiral form as shown in FIG. 4 sothat a spiral is produced which at all points comprises four thicknesses of the strip 11a. Originally the spiral may be fiat as shown in FIG. 4. However, the next operation is that of drawing or gathering thejmid-portion of each of thestrips 11a inwardly with concurrent folding of the margins of the strip 11a into the radially disposed position shown. in

same outside diameter that presents the same number of plies at the periphery thereof. The gathering is made much easier to facilitate production. 2

FIG. 7 illustrates the mounting of thebufi exemplified in FIGS. l to 6 on arotatably mounted support. Thus, for purposes of illustration, a shaft 15 is shown which is adapted to, herotated from a suitable power source such as a motor 26, the central aperture 17 of the central plate, portion 18 for they mounting means 10 of each of the buffs slidably fitting over the shaft 15, the plate 18 being secured to the mounting means 10 by the clamping members 18a stamped therefrom. The buffs, indicated generally by 24, are clamped between the

annular plates

19 and 20 by the clamping nut 21 at the end of the shaft 15. It is to, be noted that, as shown. in FIG. 7, even when the. buffs are tightlyclamped together, the thickness of the buffs at the periphery is so much greater than that in the region of the mountingmeans 10 therefor that the mounting means 10 for the individual buffs remain substantially separated. from each other. |Accordingly, the buff of this invention: has the advantage of being adapted to be well ventilated by air without resort to special means for admitting air thereinto fromv the region-between the plates19. and 20 surrounding the shaft'15. Thus air may be admitted into said region throughthe apertures 22 in the plates 19-and 20 and wardly through the spaces between the mounting means for the individual buffs for ventilating the bufi's.

In FIG. 8 the parts are as shown in FIG. 7 except that one of the buffs 24 of this invention has been replaced by conventional bufi's 16. When the conventional bufis 16 are employed it is to be noted that the mounting means for the plies is much wider relative to the bull width at the periphery with the result that the mounting means for the plies come into contact when the conventional buffs are mounted on the shaft and clamped in place. Accordingly, when the conventional buff construction is employed some special expedient must be resorted to in order to obtain adequate ventilation such as ventilating apertures through the mounting means itself or the employment of apertured spacers between each buif such as the spacer 25 shown in FIG. 8. It is noteworthy that the improved buffs of this invention may be mounted so as to obtain very good ventilation without having to resort to the expedients that are used in mounting conventional buffs.

Each of the buffs shown in FIG. 7 presents peripheral surface of twenty-four plies and by employing four buffs a total of ninety-six plies is presented. As mentioned above, sixteen plies is close to the maximum number of plies that is feasible when conventional buif construction is employed. Using a conventional butf having sixteen plies, a total of six buffs is required to produce a total of ninety-six plies instead of four buffs when the buff exemplified herein is used. The saving which results from being enabled to utilize only four buff units instead of six or more is very substantial. There is a direct saving in the number of mounting hubs required and in the number of buffs that have to be mounted and balanced. Other savings result from the fact that there is less expense for labor in making four bufis rather than six and from the increased facility with which the manufacturing steps may be carried out. These savings coupled with the further substantial saving in the amount of fabric required for a given number of plies much more than offsets the expense for applying the stitching 13, which can be very economically accomplished by a gang sewing machine. While four buffs have been shown in FIG. 7 mounted on the shaft 15, it is to be understood that any number other than four of buffs embodyirlilg fthis invention may be carried on a rotatably mounted s a t.

While this invention has been shown and described in connection with a specific embodiment thereof, the structural principle utilized is adaptable to other modifications. For example, while two plies 12 have been secured by stitching 13 to each side of each ply 11, both of the plies 12 could, if desired, be secured to one side of each ply 11 or, if a lesser number of total plies is desired, only one ply 12 could be attached to each ply 11. Alternatively, more than two plies 12 may be secured to individual plies 11. Moreover, instead of having one of the plies 12 appear on the exterior faces of the completed bufi, a somewhat better appearance is provided by omitting the plies 12 from the exterior faces of the bud. Other arrangements of the plies also are possible, such as attaching two plies 12 to some of the plies 11 and only one ply 12 to others of the plies 11. Any such disposition of the plurality of plies 12 in relation to the plurality of plies 11 constitutes disposition of the plies in intermingled successive relation, as this term is used herein and in the claims.

It is convenient and preferable in the manufacture of a buff according to this invention to produce the plies of each plurality thereof by spiral winding, as illustrated in FIG. 4, with the result that while each individual ply of each plurality of plies is annular, these annular plies are interconnected at their ends in helically disposed relation. Moreover, because of the manner of assembly, the plies 11 which constitute the first plurality. of plies are integrally joined at their inner diameters in the form of nested pairs disposed in a spiral winding. However, the joinder of the plies '11 at their inner diameters is not essential inasmuch as essentially the same bulf construction would be aiforded if the plies 11 of each pair were to be severed from each other so as to occur individually. Such severing could be along the foldline F indicated in FIG. 5 and could be effected either before or after the spiral winding step illustrated in FIG. 4. Moreover a succession of independent annuli could be employed.

As is commonpractice in making buffs, the fabric is bias cut so that each ply will present both the warp and woof ends at the periphery of the buff. When the plies 11 are bias cut and folded along the line F, the warp and woof on each side of the foldline F become disposed in opposite directions relative to each other. However, when the plies 12 are attached to the plies 11 the Warp and woof in the plies 12 may be disposed in whatever manner is regarded as preferable and so that in the complete buff there may or may not be a preponderance of directional disposition of the warp and woof in one direction or the other. When the warp and woof have different weight or are composed of different materials, it is thus possible to produce butts which have different polishing chanacteristics depending on the direction of rotation of the buff. If an assembly such as that shownin FIG. 5 is severed along foldline F and the plies on one side only of the foldline are used as a buff or are combined with those of another similar assembly from the same side of the fo ldline, then all of the warp and woo-f of the plies 11 may be caused to be disposed in the same direction and, if desired, the direction of the Warp and woof in the plies 12 may also be in the same direction as that of the warp and woof in the plies 11.

By the. securing and mounting means of this invention great flexibility is permitted in the number of plies and a single bufi may be produced having many more plies, as for example 32, than previously has been considered feasible, thus under certain circumstances enabling a single buff to be used where formerly two had been required. The buif diameter may be whatever is desired for the particular operation for which it is to be used, buff sizes ranging from about 8 to 18 inches being the most common.

The mounting means 10 which has been shown in the drawings is merely illustrativeof a preferred type of mounting means for the plies 11. Other types of mounting means also are well known inthe art and may be used for the purpose of gripping the plies 11 and providing an annular body adapted to be mounted on a shaft or other rotary bulf holder. If desired, wire stitching or stapling may be employed instead of gripping means such as the prongs 14.

While annular plies and mounting means therefor have been shown and described for purposes of illustration, other buff constructions are occasionally employed and the principle underlying this invention may be utilized whenever there are radially extending fabric plies which present adiacent peripheral bufiing edges. Thus some plies may be anchored or held in place by holding means spaced radially inwardly from the buffing edges while other plies which also present adjacent peripheral buffing edges may be disposed in the intermingled successive relation with the first group and may be secured to the plies of the first group by securing means such as stitching spaced radially inwardly from the peripheral buffing edges of the plies but spaced radially outwardly from the holding means for securing the plies of the first group.

An alternative preferred embodiment of this invention is shown in FIGS. 9, l0 and 11. Hereinabo-ve it has been mentioned that the practice of this invention is of advantage in that it enables one to produce a rotary buff using bias cut fabric in such a way as to cause the warp thereof to occur in the buff as a whole primarily or entirely in one directionof inclination from the radial inradial in half of the plies and in the opposite, direction from the radial in the other half of the plies, as is the case as the result of the conventional manufacture. The embodiment of this invention shown in FIGS. 9-11 provides a preferred Construction whereby the warp of all of the plies presenting peripheral bufl'lng edges may be caused to become disposed in one direction of inclination from the radial.

According to the embodiment shown in FIGS. 9-11, a narrow fabric strip or band 27 is employed which provides an intervening fabric tie between the rigid annular mounting means 'and the working plies whose peripheral edges are utilized for presenting the butting surface. The fabric of the band 27 need not be made of the fabric that is used for presenting a buffing surface. Thus a relatively less expensive fabric may be employed for the band 27 whose only requirement is that of suificient strength to hold the other plies of the buff. Moreover, the fabric of the band 27 need not be bias cut fabric, although it may be, but may be disposed so that in the finished buff either the warp or the Woof will be disposed substantially radially, the warp ordinarily being stronger than the woof and being radially disposed. In this manner substantial further savings can be effected inasmuch as it avoids the necessity for cutting fabric on the bias and then sewing the bias out stniip lengths together by stitching 28, as is necessary in order to provide a strip sufliciently long to form into a coil such that a suitable number of plies may be provided in the finished buff.

A strip of bias cut fabric is shown in FIG. 12, the heavier lines 29 representing the warp, and the lighter lines 30 representing the woof. In conventional buff manufacture, such a strip is wound into a cylindrical coil which is centrally condensed-along the foldline 31. When this is done the necessary result of folding along the foldline 31 is that the strip, which is indicated generally by the reference character 32, becomes folded so that in one ply 32a the warp is disposed in one direction while in the other ply 32b the warp becomes disposed in the other direction, the warp in the two plies being in a right angle relative to each other. Thus in the finished 'oulf, made up of a number of plies such as 8 or 12 plies, the warp in the plies on one side of the central foldline is disposedin one direction of inclination from the radial, while the warp in the plies on the other side of the foldline is disposed in the opposite direction of inclination from the radial.

In order to provide a buff construction wherein the warp of bias cut fabric may be disposed in only one direction of inclination from the radial throughout the huh, I have disclosed in my Patent No. 2,637,149 the condensation of one side only of a coil of bias cut fabric such as that shown in FIG. 12, rather than at the central foldline, with the result that the warp extends in the same direction in all of the plies of thefinished buff. In. such buff manufacture difliculties are presented because of the bulkiness of the condensed margin of the cylinder of bias cut fabric, which in turn requires special mounting means for the buff that is relatively heavy and thick in relation to the number of plies provided at the peripheral surface of the buff. Moreover, the manufacture commercially of a butt according to my Patent No. 2,637,149 requires the employment of a machine which is different from the machines that are conventionally used by buif manufacturers and that result in folding along the foldline 31 when the coil of bias cut fabric is condensed in forming the buff. I

According to the embodiment of my present invention shown in FIGS. 9-11, a strip or band of bias cut fabric such as-that shown in FIG. 12 may be cut into strips as, for example, by cutting the strip 32 of FIG. 12 along the foldline 31 so as to provide two strips 320; and 3% which are separately secured by stitching 33 to the margins of the strip 27 with the warp extending in opposite directions, as shown in FIG. 9, when the strips of fabric are laid out flat as shown. When, however, the composite strip is folded along the foldline 34 the

strips

32a and 32!) come face to face with the Warp in each of these plies disposed in the same direction; In FIG. 10 the disposition of the warp in the strips 32a and 32b is shown when the folding is in an intermediate position, and it is apparent that when the folding is completed the warp in the respective strips 32a and 32b is in the same direction.

In addition to the

strips

32a and 3%, additional strips may likewise be secured to the central strip 27 by the stitching 33. Thus in FIG. 9 two more strips 33a and 3312 are shown fragmentarily with the warp in these strips extending in the same direction as the warp in the strips 32a and 32b, respectively. If desired, additional strips may be secured to the central strip 27, such as 3, 4, 5 or 6, with the warp in all strips on each side of the central strip 27 in the same direction.

In the manufacture of the butt from the strip assembly, the strip assembly may be wound into a cylindrical coil such as that shown in FIG. 4 so as to build up the desired number of plies for the finished buff. Thus if the coil is wound to provide four layers of the central strip 27 and there are three plies of bias cut fabric secured toeach margin of the central strip 27, the number of plies at the foldline' and the number of plies providing the peripheral buffing edges will be the same as shown in FIG. 5. Moreover, the dimensions may be as hereinabove exemplified. However, when the central portion of the coil is condensed at the foldline and the central strip 27 is clamped by the annular rigid mounting means 19, which may be the same as in the embodiment of this invention previously described, the resulting buff is composed entirely of bias cut fabric plies and in all plies presenting a bufling edge the warp is disposed in the same direction of inclination from the radial.

' In FIG. 11 the plies are shown mounted on the mounting means 10 with the prongs or other holding means 14 gripping the plies of fabric 27. The plies of bias cut fabric. are shown with successive plies broken away to illustrate the fact that in each successive play the warp direction is disposed in the same direction of inclination from the radial. As shown in this figure, the stitching 33 whereby the bias cut plies are attached to the central strips 27 is disposed adjacent and slightly radially outwardly from the prongs 14.

The embodiment of this invention shown in FIGS. 9-11 has a number of advantages. Thus substantial savings in material and material fabrication are afforded. Moreover, the advantages of the embodiments of this invention previously described likewise are afforded. In addition, one is enabled to provide a buff wherein all of the working plies have the warp disposed in one direction of inclination from the radial while at the same time enabling this to be done using the machines that are in present use for the manufacture of conventional buffs.

When using bias cut bufiing fabric wherein the warp is substantially different from the woof as regards its stillness and other buffing characteristics, it is normally preferable to have the warp direction in all of the plies of bias cut fabric in the same inclination from the radial. However, it is apparent that in the practice of this invention the disposition of the warp and woof in the indi vidual plies may be selected as desired so that the warp may be either predominantly or entirely in one direction in the working plies of the buff.

This application is a continuation-in-part of my applicationSer. No. 688,561, filed October 7, 1957 and now abandoned.

I claim:

1. A rotary buff comprising a first plurality of radially extending annular fabric plies, annular rigid mounting means for said plies comprising holding means in secured relation to said first plurality of plies adjacent and substantially throughout the inner circumference of said first plurality of plies, a second plurality of radially eX- tending annular fabric plies presenting peripheral buffing edges and having the inner circumference thereof in ad jacent radially outwardly spaced relation with respect to said holding means, and means securing the plies of said second plurality to the plies of said first plurality along and adjacent the inner circumference of said second pluralit said plies of said second plurality being bias cut plies wherein the warp is substantially different in buffing characteristics from the woof, and said plies of said second plurality being disposed with the warp direction of said second plurality predominantly in one rotational direction of inclination from the radial.

2. A rotary buff comprising a first plurality of radially extending annular fabric plies, annular rigid mounting means for said plies comprising holding means therefor adjacent and substantially throughout the inner circumference thereof, a second plurality of radially extending fabric plies presenting peripheral bufiing edges and having the inner circumference thereof in adjacent radially outwardly spaced relation with respect to said holding means, and means securing the plies of said second plurality to the plies of said first plurality along and ad- 'acent the inner circumference of said second plurality, said plies of said second plurality being bias cut plies wherein the warp is substantially different in buffing characteristics from the woof, said plies of said second plurality being disposed with the warp direction of said second plurality primarily in one rotaticnm direction of inclination from the radial and the outer circumferences of said first plurality being spaced radially inwardly from the outer circumferences presented by said second plurality in adjacent relation to said means for securing said second plurality to said first plurality.

3. A rotary buff according to claim 2 wherein the Warp and woof of said first plurality of plies are disposed with one of them disposed substantially radially.

4. A rotary buff according to claim 2 wherein the plies of said second plurality are disposed with the warp direction disposed essentially entirely in one direction of inclination from the radial.

5. A rotary buff comprising a first plurality of radially extending fabric plies having substantially the same inner and outer diameters and a second plurality of radially extending fabric plies having substantially the same inner and outer diameters, the outer diameter of said second plurality being substantially the same as the outer diameter of said first plurality and the inner diameter of said second plurality being substantially greater than the inner diameter of said first plurality, annular rigid mounting means comprising holding means in secured relation to said first plurality of plies adjacent and substantially throughout the extent of the inner circumference of said first plurality of plies, the inner circumference of said second plurality being in closely adjacent radially outwardly spaced relation with respect to said holding means, the plies of said second plurality being secured to the plies of said first plurality adjacent and substantially throughout the extent of said inner circumference thereof to plies of said first plurality, the plies of said first and second plurality being disposed in intermingled successive relation and the plies of said second plurality being bias cut plies wherein the warp is substantially different in bufiing characteristics from the woof and being disposed with the warp direction predominantly in one rotational direction of inclinaton from the radial.

6. A rotary b-uif according to claim 5 wherein the direction of the warp comprised in said second plurality of plies is disposed essentially entirely in one rotational direction from the radial.

7. A rotary bud according to claim 5 wherein the plies of said first and second pluralities are composed of substantially the same bias cut fabric with at least half of the plies of said first plurality having the Warp direction disposed in the same rotational direction of inclination from the radial as the predominant rotational direction of inclination of the warp comprised in said second plurality.

8. A rotary bufi" according to claim 5 wherein the plies of said first and second pluralities are composed of substantially the same bias cut fabric disposed with the direction of the Warp in both of said pluralities substantially entirely in one rotational direction of inclination from the radial.

9. A rotary buff according to claim 5 wherein the plies of said first plurality of plies comprise a plurality of superposed pairs of plies integrally joined and gathered at their inner diameters in nested relation with the plies of one pair between the plies of another pair.

References Cited in the file of this patent UNITED STATES PATENTS 1,927,862 Zimmerman Sept. 26, 1933 FOREiGN PATENTS 297,923 Switzerland Apr. 15, 1954