Abstract: A package opener includes a body having a first half and a second half. One or more blade cartridges are sandwiched between the first half and the second half, the blade cartridges including one or more blades, and for each of the one or more blades, a blade shroud which protects against accidental injury from the blade. The blade shrouds are constructed of a resilient material allowing the blade tip to cut into a material while the sides of the blade remain covered. The blade shroud can include substantially identical guard portions disposed along opposing lateral sides of the blades.

Abstract: A package opener comprises a handle having a first half and a second half. A plurality of blade cartridges are sandwiched between the first half and the second half, wherein the plurality of blade cartridges include at least one package opening blade cartridge, at least one dual blade cartridge, and at least one envelope cutting blade cartridge. The package opening blade cartridge is configured at an operative bottom end of the handle. The dual blade cartridge is configured at an operative rear end of the handle. The envelope cutting blade cartridge is configured at an operative front end of the handle.

Abstract: A package opener comprises a handle having a first half and a second half. A plurality of blade cartridges are sandwiched between the first half and the second half, wherein the plurality of blade cartridges include at least one package opening blade cartridge, at least one dual blade cartridge, and at least one envelope cutting blade cartridge. The package opening blade cartridge is configured at an operative bottom end of the handle. The dual blade cartridge is configured at an operative rear end of the handle. The envelope cutting blade cartridge is configured at an operative front end of the handle.

Abstract: The portable band saw sharpener includes a frame for receiving a saw blade that is to be sharpened. A hand-operated motor is pivotally mounted to the frame for driving a grinding wheel, which engages the teeth of the saw blade. A hand-operated structure releasably holds the saw blade in place during the sharpening of the saw teeth, and the motor is guided along a path matching the contour of the saw blade teeth by a cam and an interchangeable cam track, which may be adjusted for saws of various contours and dimensions. The portable band saw sharpener is adjustable, hand-operated and portable.