US3823471A

US3823471A - Plastic safety razor

Info

Publication number: US3823471A
Application number: US00312297A
Authority: US
Inventors: R Stone
Original assignee: Individual
Current assignee: Individual
Priority date: 1972-12-05
Filing date: 1972-12-05
Publication date: 1974-07-16
Anticipated expiration: 1991-07-16

Abstract

A light, plastic razor except for the metal blade therein comprising a plastic cover, a guard plate, a metal blade between said guard plate and said cover, a guard edge juxtaposed below the blade edge and joined to said guard plate, a handle attached to the bottom surface of the guard plate and rectilinearly extending therefrom along a plane which is essentially perpendicular to the bottom surface, which handle is fragmented into three sequential sections, the first section is a nonflexible, rigid plastic member, the second section, which is directly joined to said first section and the third section, is a non-stretchable flexible, elongated plastic member having a cross-sectional area, determined perpendicular to its length, which is substantially less than the corresponding crosssectional area of the first and third sections, and the third section is a non-flexible, rigid plastic member extending from the second section.

Description

United States Patent Stone PLASTIC SAFETY RAZOR [76] inventor: Ray L. Stone, Hemlock Terrace,

PO. Box 567, Croton Falls, NY.

[22] Filed: Dec. 5, 1972 [21] Appl. No.: 312,297

Primary Examiner-Al Lawrence Smith Assistant Examiner--Gary L. Smith m 3,323,471 [451 July 16,1974

[5 7 ABSTRACT A light, plastic razor except for the metal blade therein comprising a plastic cover, a guard plate, a

metal blade between said guard plate and said cover, a

guard edge juxtaposed below the blade edge and joined to said guard plate, a handle attached to the bottom surface of the guard plate and rectilinearly extending therefrom along a plane which is essentially perpendicular to the bottom surface, which handle is fragmented into three sequential sections, the first section is a non-flexible, rigid plastic member, the second section, which is directly joined to said first section and the third section, is a non-stretchable flexible, elongated plastic member having a cross-sectional area, determined perpendicular to its length, which is substantially less than the corresponding crosssectional area of the first and third sections, and the third section is a non-flexible, rigid plastic member extending from the second section.

4 Claims, 2 Drawing Figures PLASTIC SAFETY RAZOR non-stretchable, flexible elongated member connected to oneend to the bottom of the guard plate and on the other end to the handle. The handle is laterally extended from the plane of the member. This unique structure has a shaving action which one might call a floating action, responding immediately to skin projections to give a gentle shave without tilting the head onto the guard edge. However, if the handle were inthe same plane as the elongated flexible member, then the head would bedeflected upon the guard edge when the head is suddenly deflected by a skin projection.

I have now found a novel shaver construction which sociated with the handle and possesses the floating action of my aforementioned patented razor, yet the handle and the flexible member are in'the same plane and along a single line extending from the bottom surface of the guard plate. The structure of my new razor is significantly less susceptible to deflection of the razor head upon the guard edge when the head is suddenly deflected bya skin projection.

The safety razor of this invention is distinctive in that itpossesses a plastic handle attached to the bottom surface of the guard plate which rectilinearly extends therefrom along a single plane aligned perpendicular to the bottom surface. The handle is fragmented into three sequentially interconnected sections, a first section which is non-flexible and rigid, a second section which is flexible and non-stretchable, and a third section which is non-flexible and rigid. The sequential order of each section of the handle extending from the bottom surface of the guard plate is the first, second possesses a non-stretchable and flexible component asand third sections in that order. The cross-sectional area of the second section is substantially less than the corresponding cross-sectional areas of each of the first and third sections. 7

The handle with its various sections can be constructed of the same or different plastic material and as a single piece or from a plurality of pieces. In the preferred embodiment, the razor handle is made in a single mold from one thermoplastic or thermosetting plastic.

exceptthat if the handle is made of a single plastic, the second section should be either long enough or thin enough or a combination of both to provide the desired flexibility.

ln this invention, the term non-stretchable" means the inability to stretch at room temperature (about The length of the handle is not critical to this invention l 2 FIG. 1 contains two components, shaving head A and handle B. FIG. 2 emphasizes handle B.

The shaver of FIG. 1 consists of cover 1, guard plate 3, blade 2, guards 4, and flat guide edges 5. These elements are explained in my US. Pat. No. 3,571,927, and

col. 2, lines 50-75 and col. 3, lines 1-62 thereof are incorporated herein by reference to the extent such per- 'tains to elements 1-5 and I0 disclosed therein.

With respect to FIGS. 1 and 2, handle B is attached to the bottom surface of guard plate 3. As shown, it contains three sections 8, 9 and 11, in which section 8 corresponds to the aforedefined first section, section 9 corresponds to the aforedefined second section and section 11 corresponds to the aforedefined third section. In the case of FIG. 1, section 9 is a thin and flat piece while section 9 of FIG. 2 is cylindrical. The crosssectional area of section 9, determined across a perpendicular to the elongated axis thereof, is typically much smaller than the corresponding cross-sectional areas of section 8 and 11.

The flexibility of handle B is dependent upon the thickness of section 9 at its narrowest dimension. By such thickness, one can control the floating action of the razor. y

In use, section 8 (corresponding to the first section) separates the shaving head A from flexible section 9. It

is desirable that the length of section 8 should not be shaving head A and thereby minimizes the deflection of head A upon guard edge 4 when the blade hits a skin projection or is used on a heavy or dense hair growth. If section8 were eliminated and section 9 were directly connected to the bottom surface of guard plate 3, such deflection of the shaving head-Awould be prevalent.

. The handle, as with the remainder of the shaver (other than the blade), is made of plastic, preferably one which has a 1 percent tensile modulus of at least 10,000. This means the plastic is not rubbery and is non-stretchable. The plastic is one which can be shaped I t by suchmolding processes as compression molding, transfer molding, and injection molding. Illustrative of suitable plastics are thermoplastics such as nylon, polyester, polyethylene, polypropylene, polystyrene, polycarbonate, poly(oxymethylene), ABS block copolymers, polyvinylchloride, and the like, and thermosetting plastics such as phenol formaldehyde resins, resorcinol formaldehyde resins, melamine formaldehyde resins, polyurethane resins, epoxy resins, nd the and Though this inventionhas been described with respect to a plurality of details, thereof, it should not be limited thereby, nor is intended to be so limited except as recited in the claims.

What is claimed is:

l. A light, plastic razor except for the metal blade therein comprising a plastic cover, a guard plate, a

metal blade between said guard plate and said cover, a

guard edge juxtaposed below the blade edge and joined to said guard plate, a handle attached to the bottom surface of the guard plate and rectilinearly extending therefrom along a plane which is essentially perpendicular tothe bottom surface, which handle is fragmented into three sequential sections, the first section is a honflexible, rigid plastic member directly and non-flexibly connected to the bottom of the guard plate, the second section, which is directly joined to said first section and the third section, is a non-stretchable flexible, elongated plastic member having a cross-sectional area, de-

termined perpendicular to its length, which is substan- 5 tially less than the corresponding cross-sectional area of the first and third sections, and the third section is a non-flexible, rigid plastic member extending from the second section.

one-fourth inch.

Claims

1. A light, plastic razor except for the metal blade therein comprising a plastic cover, a guard plate, a metal blade between said guard plate and said cover, a guard edge juxtaposed below the blade edge and joined to said guard plate, a handle attached to the bottom suRface of the guard plate and rectilinearly extending therefrom along a plane which is essentially perpendicular to the bottom surface, which handle is fragmented into three sequential sections, the first section is a nonflexible, rigid plastic member directly and non-flexibly connected to the bottom of the guard plate, the second section, which is directly joined to said first section and the third section, is a non-stretchable flexible, elongated plastic member having a cross-sectional area, determined perpendicular to its length, which is substantially less than the corresponding crosssectional area of the first and third sections, and the third section is a non-flexible, rigid plastic member extending from the second section.

2. The razor of claim 1 wherein the second section is cylindrical.

3. The razor of claim 1 wherein the second section is a thin flat piece.

4. The razor of claim 1 wherein the first section has a length not greater than about 1 inch and not less than one-fourth inch.