NOVELTY - The method comprises moving a sheet while moving a sheet past a freezing device (17) provided at a first edge of the sheet, cooling the first edge using the freezing device so that substance at the first edge becomes solid, moving the sheet past a machining device (16) while the substance is solid from the cooling using the freezing device, and machining, during the step of moving the sheet, the first edge with the machining device to provide a first tapered edge. The substance embeds a fibrous material, and is present in a non-solid state at temperature of 20 degrees C.    USE - The method is useful for providing a tapered edge on a sheet comprising a fibrous material, where the sheet is useful in a wind turbine blade (claimed).    ADVANTAGE - The method is capable of providing the tapered edge on the sheet without any risk of delamination or cracks in a controlled manner.    DETAILED DESCRIPTION - The method comprises moving a sheet while moving a sheet past a freezing device (17) provided at a first edge of the sheet, cooling the first edge using the freezing device so that substance at the first edge becomes solid, moving the sheet past a machining device (16) while the substance is solid from the cooling using the freezing device, and machining, during the step of moving the sheet, the first edge with the machining device to provide a first tapered edge. The substance embeds a fibrous material, and is present in a non-solid state at temperature of 20 degrees C. The substance is provided at a second edge of the sheet located opposite to the first edge. The method further comprises heating a grinding surface of the machining device so that the grinding surface is, during the step of machining, present at a temperature of less than 80 degrees C, cooling the second edge using the freezing device so that the substance at the second edge becomes solid, machining, during the step of moving the sheet past the machining device, the second edge with the machining device to provide a second tapered edge, and inspecting the first tapered edge with an inspection device located in downstream of the machining device. The sheet is a web provided as a roll (18) of material, and is rolled off the roll as the steps of moving the sheet past the freezing device and the machining device are carried out. The first and second edges are longitudinal edges of the web. The sheet is moved by a drive device located in downstream of the freezing device and the machining device. The drive device pulls the sheet off the roll and past the freezing device and the machining device. The freezing device presents a first cooling cavity enclosing the first edge. The machining device comprises a tool housing enclosing a first grinding wheel. The step of machining the first edge comprises machining the first edge with the first grinding wheel. The tool housing communicates with the first cooling cavity. The sheet comprises a pre-preg material with the fibrous material, and dematerialized water. The fibrous material comprises dry fibers. The sheet is cut transversely to a direction of movement of the sheet and cut into sheet sections using a cutting device arranged in downstream of the machining device. The sheet sections are placed in an elongated wind turbine blade shell mould so that the sheet sections extend transversely in the mould with the first tapered edge oriented in the chordwise direction of a wind turbine blade including the sheet sections. An INDEPENDENT CLAIM is included for an apparatus for providing a tapered edge on a sheet comprising a fibrous material.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic perspective view of an apparatus for machining and forming fibrous sheet-like material.    Puller (11)    Machining device (16)    Freezing device (17)    Roll of material (18)    Cooler. (20)