| 摘要 |
PCT No. PCT/SE85/00437 Sec. 371 Date Jul. 2, 1987 Sec. 102(e) Date Jul. 2, 1987 PCT Filed Nov. 6, 1985 PCT Pub. No. WO87/02926 PCT Pub. Date May 21, 1987.A method and an implement for the removal of rings (3) from material (1) such as canvas. The ring exhibits a flange-like side part (7, 9) to either side of the material, which side parts are attached to a tubular part (8) which extends through a hole (2) in the material. Removal is effected by the ring (3) being pressed between two parts (4, 5) of an implement, one (4) of which parts is forced against one side of the ring adjacent to its inner edge (16), and the other (b 5) is forced against the other side adjacent to the outer edge (20) of the ring. In this way a radial distance is provided between the engaging edges of both implements, and the ring is subjected to a tilting moment which, when the parts of the implement are pressed together, produces the conical form which causes it to be released from the material.
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