The machine includes a feeding path for the logs to be cut and a cutting head arranged along the feeding path. The cutting head includes a coupling for a disc-shaped cutting blade and is designed to impart the disc-shaped cutting blade a rotary motion around the axis thereof and a cyclic movement to cut the logs into single rolls, and to allow the logs to move forward along the feeding path. The machine also includes at least a grinding unit, including at least one grinding wheel mounted onto a rotation shaft and co-acting with a side of the disc-shaped cutting blade to grind the cutting edge of the same disc-shaped cutting blade. A controlled approach system is also provided to move the grinding wheel towards the disc-shaped cutting blade.

An electrically operated slicing machine cuts off slices from an item. The slicing machine has: a cutting device, the cutting device having a rotating circular knife driven by an electric knife motor; a carriage, movable in parallel to the circular knife, for receiving and moving the item to be cut; and a knife monitor for monitoring a state of the circular knife. The knife monitor has a current-measuring device for measuring a knife motor current. The slicing machine has a control unit which is configured to determine a cutting characteristic value from the currently measured knife motor current and/or its temporal profile.

An electrically operated slicing machine cuts off slices from an item. The slicing machine has: a cutting device, the cutting device having a rotating circular knife driven by an electric knife motor; a carriage, movable in parallel to the circular knife, for receiving and moving the item to be cut; and a knife monitor for monitoring a state of the circular knife. The knife monitor has a current-measuring device for measuring a knife motor current. The slicing machine has a control unit which is configured to determine a cutting characteristic value from the currently measured knife motor current and/or its temporal profile.

A cutting tool, in particular a knife, includes at least one blade with a blade body and a cutting edge. In order to grind or polish the cutting tool with precision even without a grinding template, provision is made for the cutting tool to have at least one supporting portion which defines a supporting plane by means of which, for the purpose of grinding and/or polishing the cutting edge, the cutting tool can be stably placed on a planar underlying surface, the blade body therefore being oriented at a working angle ranging from 65 to 80 in relation to the underlying surface. A set for grinding and/or polishing a cutting tool and also a corresponding method are likewise disclosed.

An apparatus for adjusting a knife edge offset in a cutter toolhead having a cutter toolhead frame. The apparatus including a knife moveably coupled to the toolhead, an actuated arm moveably attached to the cutter toolhead frame, a computer controller for controlling the movement of the knife and actuated arm, an abrasive sharpener moveably attached to the actuated arm and adapted to contact the knife, and a sensor adapted to determine a distance between the cutter toolhead frame and the actuated arm. The computer controller of the apparatus is further capable of adjusting the movement of the knife and the actuated arm as a function of the distance determined by the sensor.

Cutting-off machine for the transversal cutting of logs of paper material, comprising: a structure (SC) on which are moved the logs; a cutting unit (CU) with a blade (2); a grinding unit for sharpening the blade; a device for positioning the grinding wheels with respect to the blade (2);
wherein the positioning device comprises a primary carriage (4) and two secondary carriages (42, 43) driven by respective actuators; there is an optical sensor (100) that detects a cutting edge (200) of the blade (2); in a phase of operative positioning of the grinding wheels which involves sharpening the blade following the contact of the grinding wheels with the blade, the abrasive side of the grinding wheels is pushed against the blade with a thrust having a predetermined value.

Cutting-off machine for the transversal cutting of logs of paper material, comprising: a structure (SC) on which are moved the logs; a cutting unit (CU) with a blade (2); a grinding unit for sharpening the blade; a device for positioning the grinding wheels with respect to the blade (2);
wherein the positioning device comprises a primary carriage (4) and two secondary carriages (42, 43) driven by respective actuators; there is an optical sensor (100) that detects a cutting edge (200) of the blade (2); in a phase of operative positioning of the grinding wheels which involves sharpening the blade following the contact of the grinding wheels with the blade, the abrasive side of the grinding wheels is pushed against the blade with a thrust having a predetermined value.

Cutting device for longitudinally cutting a film web, in particular a plastic film web, moved in a web plane in a transport direction into a plurality of film bands, wherein a first cutter bar provided with cutting blades is immersed with the cutting blades in a cutting position into the web plane. In order to replace the cutter bar, a second cutter bar provided with cutting blades may be immersed with its cutting blades into the web plane, wherein the first cutter bar may be moved from the cutting position into a transfer position outside of the web plane when the second cutter bar is immersed with its cutting blades into the web plane.

Cutting device for longitudinally cutting a film web, in particular a plastic film web, moved in a web plane in a transport direction into a plurality of film bands, wherein a first cutter bar provided with cutting blades is immersed with the cutting blades in a cutting position into the web plane. In order to replace the cutter bar, a second cutter bar provided with cutting blades may be immersed with its cutting blades into the web plane, wherein the first cutter bar may be moved from the cutting position into a transfer position outside of the web plane when the second cutter bar is immersed with its cutting blades into the web plane.

A bandsaw having a shaped band blade, at least one pair of flywheels (5, 6) arranged to move the shaped band blade; a motor member (7) connected to at least one flywheel of the pair of flywheels; a bench (8) for supporting and feeding at least one object to be cut, wherein the shaped band blade (1) has a band having a variable width between an area (2) of minimum width and an area (3) of maximum width.