Warner-lambert Company

Fred C Wexler

William E Vreeland

Manuel Andrade

Nicholas Perricone

The present invention features a disposable razor cartridge unit or disposable razor system having a shaving aid in the form of a comfort strip mounted on a razor head, wherein the shaving aid provides a sensory change over a period of time so that the user knows that the razor head should be replaced. In one embodiment, the strip is in the form of a single layer and comprises a polymer of a first color. A coloring agent of a second color is added such that the resulting color of the shaving aid is a third color when the strip is new. The first coloring agent gradually leaches from the strip due to exposure to water, abrasion during usage, or a combination of the two, such that after a certain number of uses the color of the strip changes from the third color to the first color of the polymer. Among other embodiments of the present invention are multi-layer strips in which the outer layer or layers contain shaving aid material having a coloring agent of a first color, while the inner layer contains non-water soluble material of a second color. In a still further embodiment, one or more coatings are placed on the shaving aid. In all of these embodiments, sensory indications are provided to the user via the removal of the coloring agent, the shaving aid material or the coating, so that the user is aware that the razor head should be replaced.

Changeable color shaving aid

In accordance with the present invention, a comfort strip for a razor is provided which topically applies one or more alpha-hydroxy acids or derivatives thereof to the skin surface being shaved. In the preferred practice of the invention, the alpha-hydroxy acid or derivative thereof is incorporated within the water-soluble phase of a comfort strip affixed to a wet shave razor which allows for direct delivery to the skin during the wet shaving process.

Razor comfort strip with alpha-hydroxy acid additive

The various embodiments of the present invention are directed to razor heads having a plurality of cutting edges wherein the physical characteristics of the cutting edges are different from each other. Among the items which may be varied in the blades are the substrate material, coatings or shape. Preferably, the characteristics of the first blade should be such as to maximize the blade's cutting effect in relation to the skin/beard flow over the guard bar of the razor head. The subsequent blades are such as to maximize the cutting action as the skin flow over the first blade and on to the subsequent blades. In addition, one or more fencing elements may be disposed over discrete, spaced portions of one or both cutting edges to prevent those portions of the cutting edges from contacting the skin being shaved.

Multi-blade razor head with improved performance

Shaving systems having a plurality of cutting edges. At least one fencing element is disposed proximate one cutting edge to prevent a plurality of discrete portions of that first cutting edge from contacting the skin surface being shaved. The other cutting edge is provided with a substantially continuously unobstructed cutting edge. The present invention provides a razor head design permitting skin flow characteristics of shaving to be altered by the fenced blade to affect safety in shaving while the substantially continuously unobstructed cutting edge is exposed to deliver a closeness not obtainable with a totally fenced shaving system.

An article having a biodegradable inner core and a resistant outer coating has exposure means for exposing the inner core to the environment after completion of the useful life of the article.

Growing community of inventors

Madison, CT, United States of America

Fred C Wexler