Kiwi Edge

A product-design investigation into the relationship between the hand, the ruler, and the cutting surface. Kiwi Edge combines measurement and a cutting guide with geometry intended to improve grip and reduce movement during a cut.

The central idea is to use the ruler's form to help manage pressure. An arched cross-section directs force toward the edges, while shaped grip areas give the hand a clearer place to rest. Stability and hand placement become part of the object itself.

I developed the ruler concept and its ergonomic geometry, explored material and manufacturing options, and documented the design through sketches, product renderings, and feature studies. The project also resulted in a patent on the product.

The cambered profile is designed to distribute downward force to the ruler's edges. Recessed curves, thumb-support wings, and tactile reference points explore how the hand can hold the tool securely. The documented designs include metric and imperial scales, a stainless steel cutting edge, and proposed 12-inch and 18-inch lengths.

An acrylic version explores injection molding and number magnification; a later study investigates stamped metal and laser-etched measurement markings. These are documented design and manufacturing directions, not a claim that every version entered production.

The early sketches test finger guards, non-slip inserts, folding elements, and possible integration with a cutting mat. Later drawings bring the focus back to the ruler's own profile: camber, tactile grip, and an edge that can serve as a cutting guide.

The archive preserves these alternatives as part of the development process. Material selection, tooling, and manufacturing were still being explored in the supplied project documents.

I hold a patent on Kiwi Edge. This entry documents the product and its design development; the patent number and dates are not included in the available source material.