| 摘要 |
An assembly including a clasp member having a pair of opposing upper and lower gripping jaws which receive selected portions of sheets therein; and a wedge member for insertion between the inner surface of said gripping jaws along with the bedsheets for locking the sheets between the clasp member and the wedge member. The preferred wedge has a triangular cross-section and being of a size somewhat smaller than the space between the opposed gripping jaws, to provide some clearance when the wedge is inserted between the gripping jaws. When tension is applied to the sheets the wedge member is caused to rotate and wedge the edges thereof against the inner surfaces of the gripping jaws to more tightly grip and retain the sheets in position.
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