Apparatuses and methods for applying pressure to edge surfaces

A method of applying pressure to at least a portion of an edge surface, which bridges opposing faces of a workpiece, using an apparatus that comprises a frame;

• a first roller, coupled to the frame and rotatable relative to the frame about a first pivot axis and translationally fixed relative to the frame;
• a second roller, coupled to the frame and rotatable relative to the frame about a second pivot axis and translationally fixed relative to the frame, and wherein the second pivot axis is spaced from the first pivot axis along a first axis, which intersects and is perpendicular to the first pivot axis and to the second pivot axis;
• a rotation-control member, coupled to the frame and movable relative to the frame;
• a first biasing member, coupled to the first roller and to the second roller;
• and a second biasing member, positioned, in compression, between the frame and the rotation-control member, the method comprising steps of:
• aligning the apparatus with the workpiece, such that the edge surface of the workpiece is centered along a second axis that is perpendicular to the first axis and that extends between the first pivot axis of the first roller and the second pivot axis of the second roller;
• positioning the rotation-control member at a first location relative to the frame, such that the first roller and the second roller are rotatable relative to the frame and the rotation-control member does not contact the first biasing member;
• with the rotation-control member positioned at the first location relative to the frame, moving the apparatus and the workpiece relative to each other, such that the workpiece is received between the first roller and the second roller, stretching the first biasing member so that the first biasing member applies pressure to at least the portion of the edge surface of the workpiece, while the first roller and the second roller apply equal and opposite forces to opposing faces of the workpiece;
• and
• positioning the rotation-control members at a second location relative to the frame, such that the first roller and the second roller are rotationally fixed relative to the frame and the rotation-control member contacts the first biasing member, creating a frictional coupling between the apparatus and the workpiece, which maintains the pressure, applied to at least the portion of the edge surface by the first biasing member.