Support device for a blade, cutting or perforating device comprising the support device, and machine

A support device for a blade for cutting or perforating a web material, said device comprising:

• a support extending in a longitudinal direction;
• on the support, a seat for a blade, extending in the longitudinal direction of the support;
• at least one locking clamp connected to the support, wherein the locking clamp comprises a main body and a longitudinal edge projecting from the main body above the seat for a blade, and wherein the longitudinal edge has a surface facing the seat for a blade;
• thrust members adapted to push the locking clamp against the blade;
• a movement device, adapted to command a movement of the locking clamp with respect to the support;
• wherein the locking clamp can slide on the support in a direction transversal to the longitudinal edge of the locking clamp upon the command of the movement device, to take:
• a first position, in which the longitudinal edge of the locking clamp is distanced from a blade housed in the seat for a blade, and
• a second position, in which the locking clamp is pressed against a blade housed in the seat for a blade.

A cutting or perforating device, comprising a rotating support device for at least one rotating blade and a stationary support device for a stationary blade cooperating with the rotating blade, wherein at least one of said rotating support device and said stationary device comprises:

• a support extending in a longitudinal direction;
• on the support, a seat for a blade, extending in the longitudinal direction of the support;
• at least one locking clamp connected to the support, wherein the locking clamp comprises a main body and a longitudinal edge projecting from the main body above the seat for a blade, and wherein the longitudinal edge has a surface facing the seat for a blade;
• thrust members adapted to push the locking clamp against the blade;
• a movement device, adapted to command a movement of the locking clamp with respect to the support;
• wherein the locking clamp can slide on the support in a direction transversal to the longitudinal edge of the locking clamp upon the command of the movement device, to take:
• a first position, in which the longitudinal edge of the locking clamp is distanced from a blade housed in the seat for a blade, and
• a second position, in which the locking clamp is pressed against the blade housed in the seat for a blade.

A machine for transformation of a continuous web material, comprising

• a feed path for the web material and a cutting or perforating device comprising a rotating support device for at least one rotating blade and a stationary support device for a stationary blade cooperating with the rotating blade;
• wherein at least one of said rotating support device and said stationary device comprises:
• a support extending in a longitudinal direction;
• on the support, a seat for a blade, extending in the longitudinal direction of the support;
• at least one locking clamp connected to the support, wherein the locking clamp comprises a main body and a longitudinal edge projecting from the main body above the seat for a blade, and
• wherein the longitudinal edge has a surface facing the seat for a blade;
• thrust members adapted to push the locking clamp against the blade;
• a movement device, adapted to command a movement of the locking clamp with respect to the support;
• wherein the locking clamp can slide on the support in a direction transversal to the longitudinal edge of the locking clamp upon the command of the movement device, to take:
• a first position, in which the longitudinal edge of the locking clamp is distanced from a blade housed in the seat for a blade, and
• a second position, in which the locking clamp is pressed against the blade housed in the seat for a blade.