Abstract: A stock carton knife comprising an elongated handle having a pair of ends, a blade projecting from one end of the handle and having two lateral edges and an outer end, a lateral cutting notch in one of the lateral edges having a sharpened cutting edge and a laterally oriented mouth and including an inner sharp edge closer to the handle and an outer sharp edge farther away from the handle, the outer edge converging with the blade end to form a juncture with a blunt knob, the mouth being smaller in width than about one centimeter, and a diagonal guard plate on the blade along the inner edge, normal to and astraddle of the blade, with a first surface area toward the handle to protect the fingers of a user, and a second surface area toward the notch to limit depth of cut by the blade into a carton.

Abstract: A stock carton knife comprising an elongated handle having a pair of ends, a blade projecting from one end of the handle and having two lateral edges and an outer end, a lateral cutting notch in one of the lateral edges having a sharpened cutting edge and a laterally oriented mouth and including an inner sharp edge closer to the handle and an outer sharp edge farther away from the handle, the outer edge converging with the blade end to form a juncture with a blunt knob, the mouth being smaller in width than about one centimeter, and a diagonal guard plate on the blade along the inner edge, normal to and astraddle of the blade, with a first surface area toward the handle to protect the fingers of a user, and a second surface area toward the notch to limit depth of cut by the blade into a carton.