US3613145A - Polishing ring - Google Patents

Abstract

A POLISHING RING WITH INDIVIDUAL TEXTILE STRIPS CONSTITUTING A POLISHING BORDER, WHICH COMPRISES A CARRYING RING, AND A PLURALITY OF TEXTILE-STRIPS SURROUNDING THE CARRYING RING IN ABOUT U-SHAPE. THE TEXTILE-STRIPS HAVE MULTI-LAYER LEGS, AND MEANS ARE PROVIDED FOR CONNECTING TOGETHER THE MULTI-LAYER LEGS OUTSIDE OF THE CARRYING RINGS. EACH OF THE U-LEGS FORMS FOLDINGS BY MULTIPLE TWISTING OF THE TEXTILE STRIPS.

Description

RJKNEUSELS POLISHING RING Oct. 19, 1971 2 Sheets-Sheet 1 Filed March 14, 1969 Fig.3

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R. KNEUSELS POLISHING RING Oct. 19, 1971 2 Sheets-Sheet 2 Filed March 14, 1969 INVENTOR. fl'ww La? w w s k W United States Patent 01 Patented Oct. 19, 1971 ice 3,613,145 POLISHING RING Rudolf Knensels, Wuppertal-Vohwinkel, Germany, assignor to Bi-Flex Birkenstock KG, Wuppertal-Vohwinkel, Germany Filed Mar. 14, 1969, Ser. No. 807,382 Claims priority, application Germany, Mar. 16, 1968, P 16 77 44.1 Int. Cl. B24d 13/04 US. Cl. 15230.15 5 Claims ABSTRACT OF THE DISCLOSURE A polishing ring with individual textile strips constituting a polishing border, which comprises a carrying ring, and a plurality of textile-strips surrounding the carrying ring in about U-shape. The textile-strips have multi-layer legs, and means are provided for connecting together the multi-layer legs outside of the carrying ring. Each of the U-legs forms foldings by multiple twisting of the textilestrips.

The present invention relates to a polishing ring with individual textile-strips forming a polishing border and disposed in U-shape about a carrying ring, the multi-layer legs of the textile-strips being connected together outside of the carrying ring by a closing seam or the like.

Polishing rings and polishing discs, respectively, are known, the border of which comprises a long, passing through band member, which is disposed in folds such, that the peripheral end face of each textile layer is arranged about zig-zag and meander-like, respectively (see for example US. Pat. No. 2,004,623).

Since a plurality of textile layers arranged on top of each other are provided with uniform folding about the carrying ring, relatively uniform end zones of larger standstability running through in peripheral direction result on both sides. This prevents, however, a deeper penetration of the work piece into the polishing border. Furthermore, by this arrangement, strips can be created by this formation during the polishing on the work piece.

Furthermore, polishing rings are known, the border of which is formed of a plurality of small members produced by narrowly wound textile strips, which small members are disposed U-shaped in successive arrangement about the carrying ring, whereby the U-legs extending radial direction on the outside of the carrying ring is gripped by means of a closing seam (see US. Pat. No. 2,489,193). The U-legs disposed geometrically in one plane permit, however, likewise the creation of a joint. The present knob-like U-legs are very solid due to the winding up. A deep penetration of the work piece is, thus, also here not possible, so that substantially, the previously mentioned drawbacks occur, first of all, when the polishing rings are joined together to a polishing drum.

It is one object of the present invention to provide a polishing ring which is designed such that a deep penetration of work pieces into the border is possible, whereby a better polishing is brought about and in addition, by example, during Working of sensitive, even planes no strip formation occurs.

It is another object of the present invention to provide a polishing ring, wherein each U-leg member is folded, brought about by a multiple twisting of the textile strip.

It is still another object of the present invention to provide a polishing ring, wherein the number of folds of each U-leg of the textile strip, consisting of a bias cut textile fabric, diminishes in outward direction from the apex zone fixed in the twisted position with simultaneous widening of the individual fold layers.

It is also a favorable feature of the present invention that a plurality of separately twisted textile-strip-sections are disposed on top of each other.

It is furthermore of advantage if the textile of the border is impregnated.

Due to such formation a polishing ring of appreciably improved polishing characteristics is produced. The textilestrip-U-members, applied in a plurality thereof and having a multiple twist and providing thereby an extremely fold-rich structure bring about a very elastic polishing body, which permits an extremely deep penetration of the work pieces. First of all, concerning the edge-rich work pieces, the great danger of destruction of the polishing border does not exist any more, since the individual, loose- 1y disposed textile-strip-sections yield more elastically than in the known structures of such polishing rings. The twisting provides for the afterwards again returning U-leg of the textile-strip-section, a somewhat bouquet-like structure with deep folds, which point from the twisting axis into many directions and which, depending upon the direction of penetration of the work piece, permits an active participation of all fold layers nearly to the base of the polishing border.

The obtained short fold layers in the apex zone of the U-shaped formation, which fold layers widen slowly to the free U-leg end, are favorable due to the thereby created wedge form of the mounting of such polishing rings. The fixing of the apex zone can take place in any dilferent manner and by hot ironing, respectively. By a superposing of a plurality of normally separated but twisted textile-strip-sections, the density of such polishing rings can be adjusted to the prevailing application. By employing an impregnation for the threads of the inclined textile fabric up to the end range, a strong connection is provided. The life of such polishing discs is thereby increased. The irregular arrangement of the textile-stripsections, originating from the twisting, brings about a line-free polish, even in connection with work pieces consisting of softer working material.

With these and other objects in view, which will become apparent in the following detailed description, the present invention will be clearly understood in connection with the accompanying drawings, in which:

FIG. 1 is a side elevation of a polishing ring designed in alccordance with the present invention, shown schemat- 1ca y;

FIG. 2 is an elevation of the end face of the polishing rlng;

FIG. 3 is a textile-strip-section prior to the twisting;

FIG. 4 is an elevation of a twisted textile strip section;

FIG. 5 is an elevation of a textile strip section with the U-legs brought into parallel position;

FIG. 6 is a section along the lines 66 of FIG. 5;

FIG. 7 is a section along the lines 7--7 of FIG. 5; and

FIG. 8 is a section along the lines 8-8 of FIG. 1.

Referring now to the drawings, the polishing ring designed in accordance with the present invention comprises a carrier ring 1 which consists of wire, a ring of synthetic material, or the like.

The polishing body is formed of a plurality of separately twisted textile-strip-sections 2. These are material sections of a conventional smooth textile strip 3. The latter comprises bias cut textile fabric. In order to obtain a strip length capable of being wound up, several textile strip members are joined by gluing, or as shown in the embodiment of FIG. 3, by a seam N. The seam guide is disposed inclined to the textile strip-side border 3'.

Each textile strip section 2 is twisted about the longitudinal axis xx and folded over the carrier ring 1 so as to have a generally U-shaped form including a bight portion 2' and two substantially equally long legs 2', 2". The bight portion, as seen in FIG. 7, is more tightly twisted than the legs, as seen in FIG. 6, said legs becoming less tightly twisted at progressively further locations away from the bight.

The twisted individual-sections shown in FIG. 5 are aligned on the carrying ring 1 in series and disposed on top of each other. The U-legs are connected on the outside of the carrying ring 1 by a seam 4.

Referring now to FIG. 8, the desired irregular arrangement originating from the twisted U-legs causing a certain return position force, can be recognized.

The polishing ring is suitably impregnated. Such impregnation thereby performs a particular task, namely to glue the threads of the textile-strip-sections which are shorter, whereby the threads are better held in connection.

The polishing ring in accordance with the present invention permits the suspension of the work piece to be polished up to the base 5 of the border.

While I have disclosed one embodiment of the present invention, it is to be understood that this embodiment is given by example only and not in a limiting sense.

I claim:

1. A polishing ring with individual textile-strips constituting a polishing border, comprising:

a carrying ring;

a plurality of elongated textile strips, each twisted about its central longitudinal axis and folded over said carrying ring, each of said strips having a generally U-shaped form including a bight portion and two substantially equally long legs, said bight portion being more tightly twisted than said legs, said legs becoming less tightly twisted than that of said bight portion at progressively further locations away from said bight; and

means for joining said legs to each other and to said carrying ring.

2. The polishing ring, as set forth in claim 1, wherein said textile strips comprise a bias-cut fabric.

3. A polishing ring as set forth in claim 1, wherein said textile-strips comprise sections, and a plurality of sections twisted individually are disposed on top of each other.

4. The polishing ring, as set forth in claim 1, wherein the textile fabric of said polishing border is impregnated.

5. The polishing ring, as set forth in claim 1, wherein said U-legs of each of said textile-strips are substantially oriented opposite one another.

References Cited UNITED STATES PATENTS 1,817,176 8/1931 Curtis 15-l8l 2,783,594 3/1957 Rock 15-230.15 3,090,062 5/1963 Nelson 15179 X 3,148,963 9/1964 De Nuke 51401 X LEON G. MACHLIN, Primary Examiner US. Cl. X.R. 29130

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