A bag cutter for opening a sealed package using at least one of a blade and a piercer. Preferably, at least one blade is disposed partially within a cutout of an arm in a manner that exposes an edge of the blade. A piercer can comprise an extension of a cutout edge or be located on any other suitable portion of an arm. Another blade can be provided that is substantially perpendicular to the blade within a cutout, and juxtaposable against a cutting surface.

The package opening device generally comprises a body portion, neck portion, and cutting member. In a preferred embodiment, the body portion comprises an elongated ovular configuration. The body portion comprises an upper surface and a lower surface. Adjacent to a distal end of the body portion is a through opening penetrating the upper and lower surfaces. Adjacent to a proximal end of the body portion, the upper surface comprises a recessed area. The neck portion extends from the proximal end of the body portion. Extending downward from a neck portion proximal end is the cutting member. The cutting member comprises a tapered tip.

A utility knife is disclosed, including a housing having a handle portion and a front end. A first wing and a second wing are each pivotally engaged with the handle portion. The first wing and the second wing guide at least one blade along an edge of a box when cutting and disassembling the box. A trigger extends and retract the at least one blade such that the blade(s) are only extended during use to protect the user.

A box reducer for trimming or reducing the size of a cardboard box is disclosed. The current invention allows an operator to reduce the size of an existing cardboard box after unnecessary material is removed by a knife or a cutter. The current invention improves prior arts in two ways. First, the invention contains a stabilizer which allows itself to travel in a stable way along the top edge of the flaps of the cardboard box while marking a line to be folded to create the cover of the box. Second, instead of using perforation as prior arts do, this invention uses compression to create the line on the flaps of the cardboard box. Then the operator can fold along the line to create the covering flaps, thus, a reduced box.

The present invention generally relates to a safety cutter. Specifically, embodiments of the present invention relate to a compact safety cutter apparatus with a retractable blade guard. Embodiments of the safety cutter apparatus are further comprised of an automatic blade guard release mechanism.

The present invention describes an invention called the “Handheld Powered Box Cutter” which makes it much easier and faster to cut up cardboard packaging and boxes. It uses a handheld ergometric compact design and uses a rechargeable battery-operated motor, to drive a protected rapidly oscillating cutting blade, to ease the task of slicing various thicknesses of cardboard. The cutting blade is housed within a hooked protective cutting slot area. This slot allows pieces of cardboard to be slid into a rapidly oscillating cutting blade and it protects human fingers from being cut by the blade.

According to one representative embodiment, a knife includes a handle having a forward end portion and a rear end portion, and a blade coupled to the forward end portion of the handle. The handle includes first and second opposing side portions, the first side portion including a cutting member at the rear end portion of the handle and the second side portion including an extension portion at the rear end portion of the handle. The extension portion extends rearwardly past the cutting member in the direction of the length of the handle. The cutting member and the extension portion are spaced apart from each other a distance sufficient to receive the side wall of the lid of a tobacco can.

A package opening knife has a body part, a blade part, a gripping part that extends in an elongated shape in a prescribed first direction, and a guide part provided with a guide surface that slides in a surface direction of the package in a state of contacting the package to guide movement of the blade part. When a surface direction of the guide is defined as a second direction, the first direction and the second direction become substantially parallel to each other.

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.

A box top opener employs a trapezoidal ceramic blade having a cutting edge which is positionable at multiple positions. A knob is rotatable to extend and retract the blade. A guide projects from a front of the cutter body to provide a guide surface engageable against the top of a box. In one embodiment, a blade carrier has a follower which traverses a spiral track for displacing the blade.