Spring file
OwnerNobuo Ishiharainventor
Life of this patent
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Abstract
A spring file comprises a coiled spring, the outer flattened periphery of which is coated with abrasive particles so as to form a file face and the method of manufacturing the same. In a first arrangement of the spring file, the coiled spring has the file face coated with the abrasive particles and is joined to the tip of a hand grip. In a second arrangement, the coiled spring has the file face coated with the abrasive particles and is of considerable length and thus used portions thereof can be removed by cutting off.
Claims4
A method of manufacturing a spring file from an elongated coiled spring body including a plurality of engaged coil loops defining a waved convex outer peripheral surface along its length, comprising the steps of:
- longitudinally flattening the waved convex outer peripheral surface of the coiled spring body;
- and
- attaching abrasive particles to the flattened surface so as to form a continuous file face.
A spring file having a coiled elongated spring body including a plurality of engaged coil loops defining an outer surface which is longitudinally flattened and coated with abrasive particles to form a continuous file surface, said coiled spring body being elastically deformable in any direction along its length such that the file surface is adaptable to conform to the surface being ground.
Dependencies are inferred from the claim text.