Device for controlling the sharpening state of a blade (2) having a cutting edge (20) delimited by two sides (21, 22) converging towards a plane (X) that contains the cutting edge itself. The device comprises two control surfaces each of which is in contact with a corresponding side (21, 22) of said cutting edge (20) and is connected with at least one transducer (R1, R2, R4), which produces an electrical displacement signal (S1, S2; S4) proportional to a displacement of the control surface with respect to said plane (X). Furthermore, the device comprises a processing unit (E) that receives said displacement signals (S1, S2, S4) and compares them, emitting an error signal if the comparison produces a value that exceeds a predetermined limit. The processing unit is connected to means (101, 102) for supporting and moving sharpening means (100).

Polygonal elastomeric barrier sheets have tapered edges on at least two adjacent sides. At least one of the tapered edges is made by cutting the elastomeric barrier sheet along a cut line at an angle of at most 15 from the plane of the sheet. The elastomeric barrier sheet is supported during the cutting step to prevent distortion due to pressure of the cutting blade. The elastomeric barrier sheet can be supported from above, below or from both above and below, and can be supported on each side of the cut line. The polygonal barrier sheets so produced are useful in building and construction to seal gaps between structural elements such as expansion or control joints in a building or around functional elements such as a window or door inserted into a wall.

An apparatus for controlling and operating a circular cutting blade with cutting rolls from reels having support element designed to carry a cutting blade, with a first actuating means for rotational actuation of a blade about an axis of rotation, and an assembly (200) for translational actuation of the first support element (124) with respect to the second support element (123) so as to vary the interaxial distance between the orbiting axis (x2) and the axis of rotation (x1) of the blade.

Embodiments of the present application disclose an integrated paper and adhesive tape cutting device, including a housing, where the housing includes a paper cutting housing and a paper separating housing; a component for pulling out paper from a paper roll inside a paper separating component for cutting is arranged below the paper cutting housing; and a cutting device is arranged on an outer wall of the housing to cut an adhesive tape.

A double-blade paper cutter includes a housing, which includes a first side wall and a second side wall. The first side wall is arranged with a left paper cutting component, which includes a first slit and a first cutting knife. The second side wall is arranged with a right paper cutting component, which includes a second slit and a second cutting knife. The first slit and the second slit both extend axially from the paper feeding end of the housing. The cutting knife is configured to cut a sheet of paper entering the slit from one end of the housing.

Embodiments of the present application disclose an integrated paper and adhesive tape cutting device, including a housing, where the housing includes a paper cutting housing and a paper separating housing; a component for pulling out paper from a paper roll inside a paper separating component for cutting is arranged below the paper cutting housing; and a cutting device is arranged on an outer wall of the housing to cut an adhesive tape.