Perforating apparatus for paper webs and the like, with reciprocating motion of translation of the counter-blade
AssigneeFabio Perini S.p.A.
InventorGuglielmo Biagiotti
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Abstract
A perforating apparatus is disclosed for rewinding machines and the like which includes a rotating roller (5), on which cutting blades (31) are disposed. A shaft (3) carries a perforating counter-blade (33) provided with indentations. An oscillating drive (57, 59, 61, 63, 65) is combined with the shaft (3) which causes the counter-blade 33 to move with reciprocating translation motion in a direction parallel to the axis of the rotating roller (5), so as to avoid a concentration of wear in the cutting blades (31).
Claims7
A perforating apparatus for perforating a web material (N) in a rewinding machine comprising a rotating roller (5), on which cutting blades (31) are disposed, and a non-rotating shaft (3) carrying a perforating counterblade (33), characterized in that said counterblade (33) is indented and said blades have smooth cutting edges, that a drive means (57, 59, 61, 63, 65) combined to the shaft (3) provides a reciprocating translation motion of the shaft (3) in a direction (f3) parallel to the axis of said shaft (3), and that said shaft (3) is supported by end supports (47) which allow a variation of the inclination of the shaft (3) with respect to the web feeding direction as well as said reciprocating translation motion of the shaft in the direction (f3) parallel to the axis of said shaft (3).
Dependencies are inferred from the claim text.