US2011025A

US2011025A - Safety razor blade

Info

Publication number: US2011025A
Application number: US685939A
Authority: US
Inventors: Edward R Wharton
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-08-19
Filing date: 1933-08-19
Publication date: 1935-08-13
Anticipated expiration: 1952-08-13

Description

Aug. 13, 1935. 5 WHARTQN 2,011,025

SAFETY RAZOR Y BLADE I Filed Aug. 19, 1953 Patented Aug. 13, 1935 sAr-Ery anzoe BLADE Edward R. Wharton, Mediord, Mass.

Appiication August 19, 1933, Serial No. 685,939

1 Claim;

My invention relates to flexible safety razor blades of that class which are provided with cutting edges upon opposite sides thereof and it has for its object to provide an improved blade of this kind. It is also an object of this'invention to provide an improved safety razor'blade especially adapted and designed for use in connection with the blade-holder, shown and described in my co-pending application for patent, Serial No. 685,933 filed on or about the 19th day of August, 1983, now Patent No. 1,984,243 granted December 11, 1934.

To these ends I have provided a double edged i safety razor blade of thin, flexible sheet steel having oppositely disposed side cutting edges, said blade being formed with two straight longitudinal rows of spaced apart apertures, one of saidrows being parallel with and adjacent to one 'oisaid cutting edges and the other row being similarly disposed withrelation to the op posite cutting edge so as to provide an un-aper tured, relatively wide, median zone between said rows and two relatively narrow un-apertured side marginal zones outside of said rows which are parallel with said median zone and connected with the latter by the material of the blade. that is between the apertures of the rows and at the opposite ends thereof. In the accompanying drawing:"

Figure 1 is a plan view of a safety razor blade made in accordance with my invention.

Figure 2 is a section on line 2-2 of Fig. 1. i Figure 3 is an end view of the blade shown in Fig. 1.

and described in my above notedco-pending application, the only difference between the two forms shown being in the shapes of the apertures. The blade illustrated in Fig. 1 is a thin, flexible [length of hardened and tempered sheet steel having its opposite sides beveled to provide relatively parallel cutting edges l and having its intermediate portion formed with two rows of spaced apart apertures ll, one of said rows being adjacent to and parallel with one of said cutting edges and the other similarly disposed with re-. spect to the opposite cutting edge.

Each row of apertures I l isdisposed about midway between the longitudinal median line of the blade, as viewed in Fig. l, and the adjacent cutting edge It) so that the blade is divided into three longitudinal un-apertured zones including a longitudinal median zone [2 and two longitudinal side marginal zones l3.

The apertures I! are provided to receive the hooks of the blade flexing levers of the holder of said co-pending application and when said levers are operated to flex the blade the outermost sides'cf the apertures co-operate with the hooks of said levers to properly position the blade with respect to the guard of said holder immediately before the blade is flexed. When the holder is operated to flex my new blade the median zone i2 and the side marginal zones [3 provide abutment surfaces for said flexing levers and itis for this reason that said zones should be imperiorate or at least constructed so as to cooperate with said levers. It is also a feature of this invention that each row of holes or apertures lit consist of several such holes or apertures for. engagement with the levers of the 'flexthe apertures l I. In other words, the size of each aperture I l is so small as compared with the size of each neck It that the presence of-said apertures does not materially weaken the blade in the region of said holes or apertures.

When the blade is flexed by the leversonly the median zone I2 and the material of the blade that is between the apertures is bent or distorted transversely, the opposite side marginal zones l3 merely swihging bodily, without distortion, to- Ward or from the guard. as the levers referred to are operated in one direction or the other. This absence of distortion within the side marginal zones I3 is mainly due to the reinforcing effects of the necks IA of blade material which alternate with the apertures H, said necks being a characterizing feature of the invention common to both forms of blades herein illustrated.

A razor blade constructed as above described has its advantages over' safety razor blades of this class as heretofore constructed wherein one or more locating apertures were provided at the middle thereof with the result that the blade was 7 My new blade is devoid of locating apertures along the line of greatest flexure and those apertures which are provided are disposed along lines of least fiexure and as a result it is strong and durable.

What I claim is: v

A safety razor blade of thin flexible resilient sheet metal having oppositely disposed parallel side cutting edges and formed with two straight parallel longitudinal rows of several relatively small spaced apart apertures for the reception of the blade-flexing mechanism of a blade holder of the character described, one of said rows being parallel with and adjacent to one of said cutting edges and the other row being similarly disposed with relation to the opposite cutting edge so as to provide an imperforate, relatively wide, median abutment zone between said rows and two relatively narrow imperforate side marginal abutment zones outside of said rows which are parallel with said median zone and each of which is connected with the latter by a plurality of relatively large neck portions which alternate with the relatively small apertures adjacent thereto so that the blade is of approximately uniform flexibility transversely throughout its extent.

EDWARD R. WI-IARTON.