20120291604 | APPARATUS FOR CUTTING SHEET MATERIAL - An apparatus for cutting a workpiece sheet, which sheet includes a surface, is provided. The apparatus includes a frame, a blade carriage, and a channeled cutting surface. The frame extends between a first end and a second end, and frame includes a carriage bearing surface that extends between the second end and the first end. The blade carriage has a frame bearing surface, which surface is configured to mate with the carriage bearing surface. The blade carriage is selectively attachable to the frame such that the carriage bearing surface and the frame bearing surface are engaged with one another. The channeled cutting blade is mounted to the blade carriage, and includes an interior surface and an exterior surface. The frame and the blade carriage are relatively positionable such that at least a portion of the channeled cutting blade extends outwardly from the frame an amount that permits the cutting blade to engage and cut a channel in the surface of the workpiece sheet. | 11-22-2012 |