A recording paper cutting device enables cutting of a boundary between a first area of a recording paper and a second area of the recording paper placed at an upstream side of the first area, so that the first area is separately discharged from the second area after the first area is printed. The recording paper cutting device includes first and second cutting parts. The first cutting part of the second cutting parts moves in an approaching or departing direction so that the boundary is cut. The first cutting part includes a first cutting surface inclined by a first angle in the departing direction from the second cutting part and a second cutting surface that extends from the first cutting surface and is inclined by a second angle, which is smaller than the first angle, in the departing direction from the second cutting part.

An image forming device includes: an image former that forms an image for determining a cutting position, on a printing sheet; an image reader that reads the image formed on the printing sheet to acquire image data; and a controller that outputs data for determining a cutting position for a cutting batch which is a stack of at least two printing sheets. The controller obtains a position of the image according to the image data, calculates a representative value from the positions obtained respectively from a plurality of printing sheets in the cutting batch, and outputs data for determining the cutting position for the cutting batch according to the representative value.

An image forming device includes: an image former that forms an image for determining a cutting position, on a printing sheet; an image reader that reads the image formed on the printing sheet to acquire image data; and a controller that outputs data for determining a cutting position for a cutting batch which is a stack of at least two printing sheets. The controller obtains a position of the image according to the image data, calculates a representative value from the positions obtained respectively from a plurality of printing sheets in the cutting batch, and outputs data for determining the cutting position for the cutting batch according to the representative value.

A self-cleaning apparatus for sorting a mixture of materials is disclosed that comprises a material sorter and a gantry positioning system elevated above the material sorter. The gantry positioning system includes a longitudinal travel rail with a longitudinal travel rail carriage, a traverse travel rail connected to the longitudinal travel rail carriage running perpendicular to the longitudinal travel rail, with a traverse travel rail carriage, and a vertical travel rail connected to the vertical travel rail carriage running perpendicular to the traverse travel rail. A cutter and optionally, a picker, are connected to the vertical travel rail. The gantry positioning system can move the cutter and picker various directions to dislodge and remove material that may have accumulated on the sorter. Instead of a gantry positioning system, the apparatus may have a multi-axis arm.

A self-cleaning apparatus for sorting a mixture of materials is disclosed that comprises a material sorter and a gantry positioning system elevated above the material sorter. The gantry positioning system includes a longitudinal travel rail with a longitudinal travel rail carriage, a traverse travel rail connected to the longitudinal travel rail carriage running perpendicular to the longitudinal travel rail, with a traverse travel rail carriage, and a vertical travel rail connected to the vertical travel rail carriage running perpendicular to the traverse travel rail. A cutter and optionally, a picker, are connected to the vertical travel rail. The gantry positioning system can move the cutter and picker various directions to dislodge and remove material that may have accumulated on the sorter. Instead of a gantry positioning system, the apparatus may have a multi-axis arm.

The embodiments of the present disclosure disclose a cutter assembly, a paper cutting device and a paper cutter. The paper cutter includes a housing, a cutter assembly and a pressure guide assembly. The housing includes a paper distributor housing, and a side wall of the paper distributor housing is defined with a paper discharging port. The housing also includes a paper cutter housing. The cutter assembly includes an object picking member, and one end of the object picking member has a flat and sharp paper picking end exposed outward. The pressure guide assembly assists in positioning and guiding the paper to be cut to slide straightly toward a 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 shearing method of a plate-shaped workpiece for applying a shear force in a thickness direction of the plate-shaped workpiece includes: a step for starting applying the shear force on the workpiece with a clearance between action points in a surface direction orthogonal to the thickness direction of the workpiece; a step for applying the shear force after the start of applying the shear force until a fractured surface is created in the workpiece; and a step for increasing the clearance depending on a deformation of the workpiece in the thickness direction after starting applying the shear force until the fractured surface is created in the workpiece.

A shearing method of a plate-shaped workpiece for applying a shear force in a thickness direction of the plate-shaped workpiece includes: a step for starting applying the shear force on the workpiece with a clearance between action points in a surface direction orthogonal to the thickness direction of the workpiece; a step for applying the shear force after the start of applying the shear force until a fractured surface is created in the workpiece; and a step for increasing the clearance depending on a deformation of the workpiece in the thickness direction after starting applying the shear force until the fractured surface is created in the workpiece.

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.