| 摘要 |
<p>A group (G) for braking paper (10) being unwound from a reel (3) positioned on a supporting and rotation pin (2) of the reel (3), wherein a free end of the paper which is being unwound from the reel (3) is subjected to a pulling action and the reel (3) is made integral with the pin (2) which is free to rotate with respect to a supporting frame, a rotation blocking device (5) of the pin (2) carrying the reel (3) also being envisaged, wherein at least a pair of metallic washers (4, 7) and at least a pair of washers made of a wearing material (6, 11) are inserted on the pin (2), alternatingly facing each other (4, 6, 7, 11) to form a clutch group together with a load spring (13) which grips them in packs by means of adjustable clamping means (14, 15), it also being envisaged that at least one metallic washer (4) is positioned integrally with the pin (2), and forms part of the rotation blocking device (5) of the pin, and at least another metallic washer (7) comprises a radial extension towards the outside (8) which, upon rotation, is buffered against a stop (9) integral with the supporting frame creating means for opposing the rotation of the clutch group</p> |
