US2798594A - Blade cartridge for magazine type safety razor - Google Patents

Description

y l957 J. DILLON 7 2,798,594

BLADE CARTRIDGE FOR MAGAZINE TYPE .SAFETY RAZOR Filed Dec. 18, 1951 INVENTORz I 05527. DILLON d Arne/var.

United sta Patent BLADE CARTRIDGE FOR MAGAZINE TYPE SAFETY RAZOR Robert .I. Dillon, San Francisco, Calif. Application December 18, 1951, Serial No. 262,197

1 Claim. (Cl. 206-16) The invention, in general, relates to shaving equipment and more particularly relates to a blade-holding magazine especially suitable for use as a part of or in connection with a safety razor.

In recent years, considerable thought has been given to the production of magazine type safety razors. Most of the heretofore marketed safety razors of this type either have been of such cumbersome and unwieldy construction as materially to reduce their ease of operation and manipulation, or their costs of production have been prohibitive with relation to retail selling prices so that appreciable sales volumes could not be attained. The present invention is directed to the provision of an improved blade-holding magazine for a safety razor which obviates inherent disadvantages of use of prior razors of this type and which is of relatively simple construction and of appreciably low cost of manufacture.

A primary object of my invention is to provide an improved blade cartridge for a safety razor of the indicated nature which is characterized by elfectively sealing the cutting edges of the blades against deleterious effects of oxidation as well as from other damage thereto.

Another object of my present invention is to provide in an improved repeater-blade magazine type safety razor a magazine housing which may be integral with or detachably connected to the razor body.

Other objects of the invention, together with some of the advantageous features thereof, will appear from the following description of a preferred embodiment of the present invention which is illustrated in the accompanying drawings. It is to be understood, however, that I am not to be limited to the precise embodiment shown, nor to the precise arrangements of the various parts thereof, as my invention as defined in the appended claim, can be embodied in a plurality and variety of forms.

Referring to the drawings, the single view is a perspective View of an improved new blade cartridge constituting the preferred embodiment of my invention.

In its preferred form, my improved blade cartridge preferably comprises a block of fracturable thermo-plastic material containing a plurality of blades in superposed spaced and parallel relationship.

In accordance with the present invention and as illustrated in the single view annexed hereto, a fracturable block 11 is formed about a quantity of new safety razor blades 12 which are arranged within the block in spaced superposed relation and parallel to one another. Preferably, the block 11 is formed from a thermo-plastic material, such as strip coating; namely, a thermo-plastic compound of the type in general use and producing strip coating, by dipping or by a spraying process, similar to 3M coatings manufactured by Minnesota Minining and Manufacturing Company, or Polyblend latex, manufactured by B. F. Goodrich Company. This thermo-plastic material has wax-like properties which becomes liquid at elevated temperatures and which solidifies at normal ambient temperatures.

The cartridge 11 with contained new blades 12 can be manufactured in a plurality of ways. One convenient method of manufacture is the provision of a heated quantity of the aforesaid thermo-plastic material in a conventional vat, and causing a suitable jig, carrying the new blades in the above specified arrangement, to be moved through the vat of heated thermo-plastic material and then brought to a predetermined station for cooling, curing and setting of the thermo-plastic material. Except for the opposite ends 13 and 14 of each of the new blades 12, the blades are thus embedded entirely in the fracturable thermo-plastic material, as shown.

It has been found by actual microscopic inspection that when a newly honed blade is not sealed .from the atmosphere immediately after honing a plurality of cracks will appear along the cutting edge, thus exhibiting an appreciably ragged edge; and this is caused by the formation of amorphous metal and subsequent deformation of the cutting edge. By my improved cartridge, the thermo plastic material accomplishes the dual function of sealing the blade package or cartridge against moisture prior to the use of the blade and, secondarily, prevents the formation of amorphous metal on the honed edges of the new blades through contact with the atmosphere. This is because the cutting edges of the new razor blades are en tirely embedded within the thermo-plastic material of the cartridge and the formation of amorphous metal is entirely eliminated especially where care is taken in encasing the new blades in the plastic cartridges within a short time interval after final honing.

I claim:

A new article of manufacture comprising a cartridge of new razor blades with opposite ends of each blade proiecting therefrom; said cartridge comprising a block of fracturable thermo-plastic material, and a plurality of new razor blades each wholly encased except its ends by the material of said block and arranged in superposed spaced and parallel relationship whereby the material of said block surrounds the cutting edges of the blades and protects such edges from attack of moisture.

References Cited in the file of this patent UNITED STATES PATENTS 2,357,208 Kuhnl Aug. 29, 1944 2,392,433 Testi Jan. 8, 1946 2,557,668 Lincoln June 19, 1951 2,562,146 Hultkranz July 24, 1951 2,576,588 Gabriel Nov. 27, 1951 2,576,589 Gabriel Nov. 27, 1951

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