Abrading – Flexible-member tool – per se – Comprising fibers
Patent
1997-03-18
1999-11-23
Scherbel, David A.
Abrading
Flexible-member tool, per se
Comprising fibers
451533, 451526, B24D 1100
Patent
active
059891130
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a tool to be implemented as a grinding ring or grinding disk for the mechanical surface treatment by friction of an object. For example, the tool may be used for brushing, polishing, shining, cleaning, wetting or drying. The tool includes a cut and processed fleece of fibers.
The mechanical surface treatment is used for working numerous products including metal, wood, stone, glass, leather, synthetic material and the like, such as for example kitchen utensils, flatware, instruments, armatures, notches, grooves, frames of doors, windows, profile rods, industrial parts, jewelry and musical instruments as well as for the maintenance and care of floors, walls, glass panes, tiles and the like.
In polishing, the surface treatment is implemented in several steps with the graduated use of different tools or tool configurations which generate an increasingly finer surface. These tools include polishing rings or disks which are composed of several layers of woven textiles and in general are disposed on a common axis of rotation on a clamping ring. For polishing rings, the textile is cut into strips, folded, and fastened annularly about a core comprising cardboard rings, flanges or a metal clamping ring. For polishing disks, layers of textiles are cut to size, placed one above the other and rotated by an angle of 30.degree., and sewn and held together by cardboard flanges affixed thereon. The textile used for this purpose is in general, but for polishing in particular, a cotton textile. Except in the earlier polishing procedures, a textile having more rigid fibers, for example sisal, can also be used. Specific polishing rings or disks, can also be fabricated from a mixture of cotton and sisal textile. The polishing rings and disks, can be impregnated with a resin serving as a bonding means to increase the strength of the tool.
It has been necessary for many years to bias textiles comprising cotton or other nonmixed or mixed fiber materials before cutting them to size and processing them into folded rings. Biasing aligns the warp and weft threads so that they extend obliquely to the selvedge and thus prevents fraying. For this procedure a special reversing machine is required which sews the edges of the textile together thus forming a tube. Subsequently the textile tube is helically cut open into webs (biased) and rolled up to form bales. The threads form an angle of 45.degree. at the periphery of the folded rings. The problem of fraying of the folded rings is intended to be counteracted by means of the biasing (cf. Journal L'Usine Nouvell, March 1961, "Techniques modernes de Bufflage et de Pollisage").
By folding pleats into the textile strips, the polishing ring is automatically ventilated during rotation and receives the requisite pliability to envelope or wrap the part to be polished and forms honeycombs at the periphery which hold the polishing paste. Polishing pastes due to their grinding and lubricating capability are always required when polishing surfaces.
Conventional polishing tools, however, have economic as well as technical disadvantages. These are in particular the following: regulation of import quotas by the European Union with respect to cotton textiles, prices of the raw material cotton, automated which results in disturbing side effects of hard and broad bias seams which impair the production process as well as the quality of the surface treatment, textile, disks.
Polishing tools composed of fleece are rarely used. FR 1 426 721 describes in this regard, for example, a polishing or grinding material comprised of fleece which comprises permanently undulated synthetic filaments. In the process, an adhesive substance with or without grinding particles is applied onto the filaments held in tension. When the tension is relaxed the fibers become interlaced and are subsequently thermofixed. The fleece obtained in this way is cut into an annular polishing tool and processed. FR 2 310 838 also discloses polishing rings which comprise several layers of fle
REFERENCES:
patent: 1529701 (1925-03-01), Hewitt
patent: 3122766 (1964-03-01), Peterson
patent: 3597887 (1971-08-01), Hall, Jr.
patent: 3991526 (1976-11-01), Frank et al.
Banks Derris Holt
Heinrich Lippert GMBH
Scherbel David A.
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