| 摘要 |
PURPOSE:To generate and increase gripping force automatically, by providing the sproket wheel obliquely to the plane of the film, so as its axis of rotation is crossed making an acute angle with the plane containing the film and the plane of rotation is crossed with the plane of the film near the film edge part. CONSTITUTION:Roller chains 4, 5, 4', 5' are driven by engaging with the entrance and exit side sprocket wheels 9, 10 and 11, 12 at the upper and under parts of the left side and the entrance and exit side sprocket wheels 9', 10', and 11', 12' at the upper and under parts of the right side. The sprocket wheels 9, 9', 10, 10' are attached respectively to the upper side shafts 15, 15' attached to the frames 13, 13' adjustably up and down with the adjusting screws 14, 14' and to the lower side shafts 16, 16' fixed to the frames 13, 13', being enabled to rotate freely. The rotational shaft axes k, k', l, l' of sprocket wheels 9, 9', 10, 10' are corssed making an acute angle with the surface and the back of the film m, n, and the rotational planes q, q' r, r' are crossed with m, n near the film edges 3, 3'. |
