Cutter for use in paper manufacturing

In a cutter for use in paper manufacturing comprising an operative structural unit having at least one support cooperating with a sliding and translation means, a bearing beam, guides for the translation of said operative unit along said bearing beam, said operative unit including means for selectively locking and unlocking said support on said beam, a circular knife, a support for rotatingly supporting said knife, means for lowering and raising said knife support, and means for synchronizing the lowering and raising means for the circular knife and the means for locking and unlocking said support on said beam so that simultaneously with the lowering of said knife support said support cooperating with said sliding and translation means locks with respect to said beam and simultaneously with the raising of said knife support said support cooperating with said sliding and translation means unlocks with respect to said beam, and a counter-knife, the improvements comprising:

• means included with said knife support for moving said knife in a direction parallel to the axis of rotation of said knife;
• an elastically deformable means connecting said knife support to said means for lowering and raising said knife support;
• and
• means operatively connecting the means for lowering and raising said knife support to the means for moving said knife in a direction parallel to the axis of rotation of said knife so that simultaneously with the lowering of the knife support and the locking of the support on the beam, said knife approaches the counter-knife, and simultaneously with the raising of the knife support and the releasing of the support from the beam, said knife departs from the counter-knife.