Shock absorbing GEM Razor Blade
Invention Razor Blade
Filed Saturday, 29th November 1930
Published Tuesday, 29th October 1935
Inventor Stephen J. Duritza
Owner American Safety Razor Corporation
Language EnglishCPC Classification:
Razor-blades characterised by the shape
Performing Operations; Transporting
Hand Cutting Tools; Cutting; Severing
Hand-Held Cutting Tools Not Otherwise Provided For
Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
Parts not referenced in the text: None
Parts not referenced in the images: None
My present invention relates generally to razor blades and more particularly to the type of razor in which the shaving edge of the blade is to be received against front aligning stops to give such edge its predetermined position or relationship. Example of such type of razors are those known today as the “Gem” and the “EverReady”.
Where razors of this character are dropped on the floor or brought suddenly against a hard surface, it is generally the corners either of the blade seat or of the clamping cover where such clamping cover is employed, which receives the force of the impact, and may result in the bending of such corners. Where such bent corners engage the blade either at or adjacent to the shaving edge there may be the tendency in such a case for the shaving edge to be distorted from its true straight alignment for its most efficient shaving.
It is one of the objects of my invention to so arrange, treat or construct sections of the blade that this tendency to distortion under these conditions will be minimized or wholly eliminated.
I will, for purposes of convenience illustrate and describe my invention as embodied in a blade of the type employed for the Ever-Ready and the Gem razors. In this type of razor, the blade is received upon a seat or saddle which presents along its front edge, guard teeth of the conventional character and upstanding lugs at each side of the guard edge which serves as front stops for engaging the extreme ends of the shaving edge of the blade. Associated with the seat or saddle is a clamping member in the form of a cover which, in the aforementioned type of razor, is pivoted to the razor seat or saddle. To assemble the blade with the razor it is generally the practice to place the blade on the saddle in an advanced position so that the opposite corners of the shaving edge engage with and abut against these front stops at the guard edge, which stops thus serve to give the shaving edge a definite shaving position. As a result of this arrangement, the opposite ends or extreme portions of the shaving edge of the blade serve no shaving function and the active shaving edge is that portion between these extreme corners.
It is another object of my invention to so arrange, treat or construct the material adjacent those portions of the shaving edge which do not function, namely those portions which abut against the front stops, that any distortion of either or both corners of the saddle will not be transmitted to the active shaving edge.
In the type of razor aforementioned, in which, as stated, a cover clamping member is employed, the effect of any bending or distortion of either or both of the corners of the cover member also will be minimized or counter-acted by the character given to the above mentioned corner portions of the shaving edge.
Blades hitherto received in the razors known as the “Gem” and the “Ever-Ready”, have only a single shaving edge and have about the opposite edge a reenforcing back, the purpose of which among others is to give to the blade as a whole, added rigidity, and to increase the ease with which the blade can be handled.
It is another object of my invention to so arrange this reenforcing back as to increase the rigidity of that portion of the shaving edge which has above been pointed out as functioning in the process of shaving.
It is another object of my invention to combine with the feature of blade sections especially arranged for compensating for distortion of the razor parts, of a reenforcing back of the character referred to which will co-act specifically therewith to maintain the active portion of the shaving edge undistorted.
For the attainment of these objects and such other objects as may hereinafter appear or be pointed out, I have illustrated embodiments of my invention in the drawing wherein—
For purpose of convenience of illustration, I have shown my invention as embodied in a blade of the type shown in U. S. Patent No. 1,739,280. As disclosed in the aforementioned patent, the blade
Where a razor of the type herein referred to, drops, it is a well established fact that it will fall either on one of the corners of the guard edge or on one of the corners of the clamping cover and either on or adjacent one of the front stops
In the modification of
In each of the aforementioned embodiments, I show a back
It will be understood that the reinforcing member
Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent is—
1. A blade defined by a substantially straight shaving edge along one end and side walls at an angle thereto to provide corner portions at each end of the shaving edge, and slits extending obliquely from said side walls and in inward diverging relation to said shaving edge and spaced from said shaving edge, thereby forming tongue like corner portions one side of which is formed by the shaving edge, said corner portions being of greater resiliency than the portion of the shaving edge therebetween so as to form impact or shock absorbing areas.
2. A wafer type safety razor blade of rectangular shape having a cutting edge formed along one edge thereof, reinforcing means for rendering the middle portion of said shaving edge relatively rigid and a slit in the blade positioned adjacent each end of the shaving edge for rendering the end portions of said shaving edge relatively flexible, each of said slits terminating at a side of the blade adjacent one end of the shaving edge, and being spaced from the shaving edge, and disposed at an angle to the shaving edge, whereby the tongue formed therebetween and the shaving edge is of progressively increasing width from its free end portion to its base and whereby flexing of the tongue due to deforming stresses on its end will be more nearly uniform throughout the length of the tongue.
3. A blade provided with a shaving edge at one end and intended to have its end portions engage front stops of a razor and a reinforcing member on the end of the blade opposite the shaving edge, said reinforcing member having a portion thereof positioned substantially symmetrically of the length of the shaving edge and of less length than the shaving edge whereby that portion of the shaving edge intermediate the end portions thereof will have its rigidity increased, the end portions of the shaving edge being so arranged and constructed as not to transmit any distortion thereof to the portion of the shaving edge therebetween and said end portions of the shaving edge being located on portions of the blade separated from the body of said blade by slits spaced from the shaving edge and extending inwardly from the side edges of the blade.
4. A safety razor blade of the wafer type of substantially rectangular shape and having a shaving edge on one of the longitudinal edges thereof and a rigid backing applied to the opposite edge to rigidify the rear portion of the blade, and also having a plurality of slits extending inwardly from each of the sides thereof so as to divide the portions of the blade adjacent said sides into at least three tongues, and said backing having portions thereof extending into certain of said tongues, and said backing, where it extends into said tongues, having portions cut away so as to reduce the rigidifying effect of said backing on said tongue, whereby a blade will be provided having a relatively rigid middle portion and side portions relatively flexible throughout a substantial portion of their extent.
Stephen J. Duritza.