Abstract: A knife assembly for cutting a substrate during relative motion between the knife and the substrate, the assembly including a knife having a distal knife blade and a proximal knife shaft attached to a holder rotatable about a first axis perpendicular to the substrate to define a cut direction angle. The holder is also configured to rotate the knife blade about a second axis perpendicular to the first axis to form a notch angle relative to the first axis. The notch angle is preferably automatically infinitely adjustable within a range of angles. The holder may also, optionally, be configured to rotate the knife blade about a third axis perpendicular to a plane defined by the knife blade to adjust an angle of attack of the knife blade relative to the substrate.

Abstract: Systems and methods for processing a sheet having a printed underside. A gap between a feeder and a processing machine provides visibility to the printed underside, cameras capture images of the printed graphics through the gap, and a processor stitches the captured images together into a continuous image of the printed underside, including registration marks, corners or edges, and a sheet identifier. Processing instructions are retrieved from storage using the detected sheet identifier and are executed along processing paths calculated from detected information regarding locations of the registration marks and the corners or edges. A material guide positioned above the material path may be configured to constrain the sheet vertically as it passes over the gap and to reduce overhead light from interfering with the image capture.

Abstract: A separator (10) for separating waste (820) from product (810; 2302) in a pre-cut substrate (2600) having one or more cut lines. An inlet feeder feeds the substrate (2600) into the separator (10) along a material path. A separation edge (2500) is disposed in a location downstream of the inlet feeder and defines a line below the plane of the material path. A plurality of punch tools (30; 1800; 1900; 2000) above the plane of the material path, upstream of the separation edge (2500), each has an actuator configured to position the tool in an extended configuration with a contact end of the punch tool (30; 1800; 1900; 2000) disposed below the separation edge (2500), and a retracted configuration with the contact end disposed above the plane of the material path.