| 摘要 |
<p>The machine (10) enables rounding of the sharp corners of hard covers (28) to be applied to books of various types, and comprises: a forming die (42) presenting a sunken part (66) having, in plan view, substantially the length and width of the sharp cornered cover (28), the sunken part of the die presenting however rounded corners (67) having the same profile as those which are to be obtained for the cover (28); pressing means (54) for pressing the cover (28) to its full extent within the sunken part (66) of the die (42) except in the regions comprising its sharp corners, so that these latter become folded (29) outwards, the completely clad face of the cover (28) facing inwards; punch means (56), the profile of which partly matches the profile of the rounded corners (67) of the sunken part (66) of the die (42), to press each folded corner (67) of the cover (28) against the sunken part (66) of the die (42); and means (48) for extracting the cover (28), which now presents its corners rounded, from the die (42).</p> |
