|Publication number||US2326774 A|
|Publication date||Aug 17, 1943|
|Filing date||Jul 11, 1939|
|Priority date||Jul 11, 1939|
|Publication number||US 2326774 A, US 2326774A, US-A-2326774, US2326774 A, US2326774A|
|Inventors||Freedman Benjamin H|
|Original Assignee||Freedman Benjamin H|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (16), Classifications (13)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Aug 17, 1943. B. H, FREEDMAN 2,326,774
SAFETY RAZOR Filed July 1'11, 1959 sgar---nng INVENToR ATTORNEY f Patented ug. 17,
snm nazcal Benjamin E.
application .my 11, reas, sanar Na. :wm
' (ci. soa-ici Chime.
This invention relates to safety razorsin general, and more 'especially to safety razors characterized by a multi-edged razor blade sandwiched between a guard and a cap.
Among the objects of the present invention, it is aimed to provide an improved safety razor characterized by a multi-edged razor blade sandwiched between a guard and a cap, in which the razor blade has formed thereon a distinguishing mark so positioned that it will be discerned when sandwiched as aforesaid, to facilitate the user in selecting one or another oi the cutting edges.
it is stili another object oi the present invention to provide a doubie edged razor blade having formed thereon a marking which will cooperate with the holder in facilitating the user in selecting the cutting edge desired.
More specieally, it is an object or the present invention to provide a double edged razor blade having formed thereon a marking contrasting in color with the material of the holder adjacent one cutting-edge that in turn is readily distinguishable from the other cutting edge either by no marking at all, or by a marking that contrasts in color with the marking on the other cutting edge, so that the cutting edges are readily distinguishable from one another when the blade is in the conventional holder ready for shaving use.
These and other features, capabilities and advantages of the present invention will appear from the subjoined detail description of specic embodiments thereof, illustrated in the accompanying drawing in which Figure 1 is a cross section of a safety razor with a double edged razor blade having markings coated thereon, sandwiched between a cap and guard on an enlarged scale to :facilitate illustrating the features of the invention;
Fig. 2 is a plan of the embodiment illustrated in Fig. l, with a part of the cap broken away, the surface of the blade having the conventional designations thereon to represent contrasting colored coatings;
Fig. 3 is a cross section of a blade similar to that used in the embodiment of Fig. l on a larger scale than that illustrated iny Fig. l;
Fig. 4 is a fragmental plan of a razor blade with 'the coatings in contrasting colors slightly wider than illustrated in Fig. 2, and slightly spaced from the cutting edges as compared to the embodiments of Fig. 2;
Fig. 5 is a iragmental cross section oi the embodiment illustrated in Fig. 4;
Fig. 6 is a fragmental plan of a razor blade with coatings in contrasting colors formed in depressed parallel rows; I
Fig. 7 is .a frag-mental cross section of the embodiment illustrated in Fig. 6;
Fig. 8 is a planshowing a blade sandwiched between a guard and a cap in which the cap is partly broken away and provided with waved edges to increase exposed faces o the marmngs in contrasting colors; f
Fig. 9 is a fragmental plan of a razor blade with-a colored marking adjacent each edge ofthe same, and contrasting with the appearance 'of the capto be used, and in winch the markings distinguish from one another in that one marking is continuous and the other is interrupted;
Fig. iii is a fragmental plan or a razor blade with. the colored marking adiacent one edge alone contrasting with the appearance of the cap Vto ce used and the area adjacent :the other edge is distinguishable from the first colored marking in that it is free irornany marking;
Fig. li is a plan or a razor blade having markings adjacent the 'cutting edges, contrasting in color with one another and in addition, provided with inscriptions to indicate the v'respective purposes for which the adjacent cutting edges are to be used;
Fig. l2 is a fragmental sectionon the line A 62-22 of Fig. ll, but on an enlarged scale.
In practice it has been round that safety razors having multi-edged blades and particularly double edged blades, can be used to advantage in one of several ways. As'A an instance, with the person who requires a second time over, that person obviously would get the most use out 'of a two edged razor blade, if he would use one edge for the rsttime over and the second edge for the second time over. With persons who :dnd it necessary to perform a second treatment or a second time over, it has been found in practice, that a diderent cutting edge is preferableior the rst time over than that used for the second timel over. As an instance, some barbers :und a better job can be performed when a razor having a. cutting edge that is shallow ground is used for the rst time over and a razor having a cutting edge that is deep ground is used for the second time over. i
0n the other hand, it has also been yfound to advantage that these 'safety razors having multiedged blades such as the double edge blades extensively used today, can be used to advantage by those who wish to use one and the same razor blade several times and it is oi course obvious that each shaving operation will tend slightly to dull the blade. Consequently, if the user wishes to use one and the same double edged'safety razor blade two successive times, and wishes to use only one cutting edge the rst dayjand the second cutting edge the second day, he, just as j well as the user who wishes to use one cutting edge for thev rst time over and the other cutting f edge for'the second time over, would find it to advantage to have a razor which would readily distinguish -to him one cutting edge from the other.
Heretofore attempts have been made to distinguish to the user one cutting edge from the other by etched. inscriptions, as an linstance. Such blades,jhowever, were not practical and were not extensively adopted due to the conditions that accompanied the use of the blade. As an instance, whether the user used shaving cream or soap suds, the etched inscription would quickly be covered at least in part so that it would be diiiicult to read the etched inscription with'- out thoroughly washing the razor. Still furthermore, the home shaver generally attends to this part of his toilet in the bathroom. It is well known that if the bathroom is not provided with daylight, and even though provided with-daylight and the shaving operation is performed during the evening when artificial light is necessary, that the average bathroom is not provided with as good illumination as that in the living room, as an instance. This custom of poor illumination in bathrooms resulted in another reason why razors merely provided with etched inscriptions to distinguish the different cutting edges were not practical.
In view of the foregoing, and as set forth in the introduction to the specification, the present invention has for an object to provide a razor blade equipped with a marking so that the different cutting edges can be readily distinguished when the blade s-in the conventional holder ready for use or during use, and whether or not the illumination is good.
In the embodiment illustrated in Figs. .1, 2 and 3, there is provided a safety razor having a holder or handle' I, to which a guard 2 is rigidly attached and which is generally provided with an internally threaded chamber 3 to receive the stem 4 of the cap with the razor blade 6 sandwiched between the cap 5 and the guard 2 as shown in Fig. l. The blade 6 as a rule is provided with a central opening 'I to receive the stem 4 of the cap 5. The razor illustrated in Fig. 1 is typical of the conventional razors suitable for use with a two edged razor blade manufactured as plane wafers which are-curved over into the position shown in Fig. l when sandwiched between the cap 5 and guard 2. The thickness of the blade B here is exaggerated for the purposeof illustration. The cutting edge 8 in the present instance, is shallow on both sides and intended for shaving the rst time over, and the cutting edge 3 is deep ground on both sides and intended for use for close shaving or for the second time over. In the embodiment illustrated in Figs. 1, 2 and Y 3, adjacent the cutting edge 8, there is formed a colored band or marking I0, indicated in the present instance as red, and adjacent the cutting edge 9, there is formed a second band or colored marking II, indicated in the present instance as green. formed on both surfaces of the metal strip before the strip is stamped out if the plane wafer type of razors are to be formed and at any rate the colored bands are preferably formed on the opposite faces of the blade before the cutting edges 8 and 9 are formed in which case, as indicated, the colored markings at the cutting edges will be partially removed when the cutting edges are being ground.
The safety razor holder including the handle I, guard 2 and cap 5, are preferably composed of metal in the conventional way and nished in a metal sheen, either the typical silver or gilt These bands I9 and II are preferably sheen. The color selected for the bands I0 and II are then selected not only to distinguish from one another so that the cutting edge desired may with facility be selected, but in addition the colors selected are those which distinguish from the finish o1' the cap and guard. These bands Il and II extend to the start of the ground bevel edge, see Fig. 2, and expose that portion of the colored band that extends beyond the edges I2 and I3 of the cap 5.
The embodiment illustrated in Figs. 4 and 5 shows the bands I4 and I5 considerably wider than the bands III and I I, respectively, of Fig. 2, but slightly spaced from the cutting edges Il and I'l. The colored band I4 is indicated as green and the colored band I 5 is indicated as red.
The embodiment illustrated in Figs. 6 and 'I shows a number of parallel grooves formed adjacent the cutting edges I8 and I9 which are filled with a'coloring medium 20 and 2|, the colored medium 20 in the present instance being indicated as green and the colored medium 2| being indicated as red.
In Fig. 8 the blade 22 there illustrated is substantially identical to the blade shown in the embodiments of Figs. 4 and 5 but the cap 23 is shown as having waved edges 24 and 25as distinguished from the plane edges I2 and I3 of the cap 5 whereby the exposed portion of the colored bands 26 and 21, respectively, may be increased and therefore accentuated.
In Fig. -9 the colored band 28 distinguishes from the colored markings 29 primarily in that the colored marking 28 is continuous whereas the markings 29 are interrupted and consist of a plurality of parallel markings vertical to the cutting edge 30.
In Fig. l0, the colored band 3l is formed adv jacent to the cutting edge 32 whereas the portion'of the blade adjacent the cutting edge 33 is not marked, whereby the cutting edges 32 and 33 can readily be distinguished from one another.
In the embodiment illustrated in Figs. 11 and l2, the colored bands 34 and 35 distinguish from one another in color, the band 34 as an instance being indicated as red and the band 35 as green. These bands 34 and 35 also distinguish from the embodiment illustrated in Fig. 4 in that they consist of individual panels. Still furthermore, the band 34 has formed an inscription thereon to designate its use, as an instance For rst time over and the band 35 has an inscription marked thereon to indicate its use as an instance, For second time over. It will also be noted that the cutting edge 36 in Fig. 11 is narrower and therefore indicative of a shallow ground, the type preferred for the iirst time over in shaving and the cutting edge 31 is wider than the cutting edge 36 to indicate that it is deep ground, the type preferred for a close shave or for the second time over. l
It is of curse obvious that the colors used are immaterial so long as they definitely distinguish from one another and from the appearance and marking of the cap and holder.
The present invention also contemplates a new method of manufacture consisting in producing ,Y
colored bands on a sheet or strip of metal, thereupon stamping out or cutting the blades from the strip or sheet of metal, whether or not at the same time cutting through the colored bands, and thereupon grinding the cutting edges on the strips or blades While at the same time removing part of the` colored matter originally formed on the strip or sheet of metal.
does not exceed .008 of an inch. By means of the coatings I or Il, which can vary according to desire from at least .001 of an inch up to at least .004 of an inch, the distance of the cutting edge to the guard and cap may with facility be regulated withoutchanging the .conventional width of a blade with respect to the conventional widths respectively of their cap and guard.
p While this regulation of the position of the cutting edges of a wafer blade relative to its guard and cap thus would naturally flow from the marking of a blade with a coating adjacent to its cutting edge, it is, of course, obvious that the function thereof will result independent of the fact that the coating be colored.
By these coatings the same shaving results may be obtained with a thin steel wafer type of blade as have heretofore been obtained with the identical or similar type of blade but made from steel of greater thickness. The eiect o f the coloring material on the under side of the blade when same is seated in the holder ready for use and in use is to elevate the cutting edge of the blade further from the guard edge by the equal additional distance corresponding to the thickness of the coloring material employed. The
elect is to relocate the cutting edge of the blade with respect to the guard edge by an increased distance in the manner heretofore obtained by using a steel of vconsiderably greater thickness which latter however has been satisfactory from the standpoint of obtaining the desired cutting edge.
It is obvious that various changes and modifications may be made to the details of construction and tothe steps of the method of producing a razor blade without departing from the general spirit of the invention as set forth in the appended claims.
1. In a razor, the combination of a guard having two guard edges, a cap having two cap edges, and a` wafer blade of less than .008 of an inch in thickness having two cutting edges sandwiched between said guard and cap, the blade having eolored coated areas in part exposed beyond and adjacent the cap edges, the coated areas being engaged by areas of the guard and cap adjacent the edges of the guard and cap, the thickness of the coated areas controlling the additional distances that the cutting edges are to be spaced from the cap edges and guard edges and the,
color thereof being optically diierent from the color of the other exposed strip, cap and guard.
2. In a razor, the combination of a guard having two guard edges, a cap having two edges, and a wafer blade'of a predetermined thickness having two cutting edges, the waferv blade being sandwiched between said guard and cap with the cutting edges, guard. edges and cap edges parallel to one another, the cutting edges extending beyond the cap edges and the guard edges in turn extending beyond the cutting edges, the thickness of the cap edges cooperating with the guard edges and cutting edges to determine the position of the cutting edges with regard to the surface to be shaved, leaving a strip exposed throughout its length between each cutting edge and its adjacent cap edge, anda color coating formed on the blade parallel and adjacent to their cutting edges and on its exposed strip with the cap edges resting on said coatings, the thickness of the coatings supplementing the thickness of the wafer blade to determine the distances that the cutting edges are to be spaced from the cap edges and the color thereof being optically different from the color of the other exposed strip, cap and guard.
3. In' a razor, the combination of a guard having two guard edges, a cap having two cap edges, and a wafer blade having two cutting edges sand- Wiched between said guard and cap, the blade having colored `coated areas in part exposed beyond and adjacent the cap edges, the coated areas being engaged by areas of the guard and cap adjacent the edges of the guard and cap, the thickness of the coated areas controlling the additional distances thatthe cutting edges are to be spaced from the cap edges and guard edges, and the color thereof being optically different from the color of the other exposed strip, cap and guard.
4. In a razor, the combination of a, guard having two guard edges, a cap having two edges, and a wafer blade of a predetermined thickness having two cutting edges, the wafer blade being sandwiched between said guard and cap with the cutting edges, guard edges and cap edges parallel to one another, the cutting edges extending beyond the cap edges and the guard edges in turn extending beyond the cutting edges, the thickness of the cap edges cooperating with the guard edges and cutting edges to determine the position of the cutting edges with regard to the sur-- face to be shaved, leaving a strip exposed throughout its length between each cutting edge and its adjacent cap edge, and a coating formed on each blade parallel and adjacent to its cutting edges and on its exposed strips, with the cap edges resting on said coatings, the thickness of the coatings supplementing the thickness of the wafer blade to determine the distances that the cutting edges are to be spaced from the cap edges, the color of the coating on one of the exposed strips being optically different from the color of the coating on the other exposed strip.
5. In a razor, the combination of a guard having two guard edges, a cap having two edges, and a wafer blade of a predetermined thickness having two cutting edges, the wafer blade being sandwiched between said guard and cap with the cutting edges, guard edges and cap edges parallel to one another, the cutting edges extending beyond the cap edges and lthe guard edges in turn extendingvbeyon'd the cutting edges,` the thickness of'the cap edges cooperating with the guard edges and cutting edges to determine the positionofthe cutting edges with regard to the` surface to be shaved, leaving a strip exposed throughout its length between each cutting edge and its adjacent cap edge, and a coating formed on each blade parallel and adjacent to its, cutting edges and on its exposed strips, with the cap edges resting on said coatings, the thickness of the coatings supplementing the thickness of the wafer blade to determine the distances that the dcutting edges are to be spaced from the cap edges.
BENJAMIN H. FREEDMAN.
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US2680290 *||Feb 1, 1949||Jun 8, 1954||Samuel Steinberg||Safety razor and blade therefor|
|US2703451 *||Mar 4, 1950||Mar 8, 1955||Fennelly Joseph C||Cutting instrument having means for indicating usage|
|US2775295 *||Mar 30, 1953||Dec 25, 1956||Williams Fred R||Article of fabric and method and means for making the same|
|US2866264 *||Feb 19, 1957||Dec 30, 1958||Hightower Thomas H||Hair trimming blade for safety razors|
|US3137939 *||Jun 6, 1962||Jun 23, 1964||Waldeck George A||Safety razor marker|
|US5603161 *||Jun 7, 1995||Feb 18, 1997||Welsh; Christopher A.||Wear indicating shaving strip and blade assembly for a shaver|
|US5998431 *||Apr 16, 1998||Dec 7, 1999||Gillette Canada Inc.||Sustained-release matrices for dental application|
|US6185822||Jul 1, 1999||Feb 13, 2001||The Gillette Company||Shaving system|
|US6442839||Sep 13, 2000||Sep 3, 2002||The Gillette Company||Shaving system|
|US7338664||Sep 15, 2003||Mar 4, 2008||The Gillette Company||Color changing matrix as wear indicator|
|US8505414||Jun 17, 2009||Aug 13, 2013||Stanley Black & Decker, Inc.||Method of manufacturing a blade|
|US8701586 *||Feb 7, 2011||Apr 22, 2014||Raptor Mining Products Inc.||Magnetic wear saving device|
|US8769833||Sep 10, 2010||Jul 8, 2014||Stanley Black & Decker, Inc.||Utility knife blade|
|US20040134010 *||Sep 15, 2003||Jul 15, 2004||The Gillette Company, A Delaware Corporation||Color changing matrix as wear indicator|
|US20090314136 *||Jun 17, 2009||Dec 24, 2009||The Stanley Works||Method of manufacturing a blade|
|US20110129638 *||Feb 7, 2011||Jun 2, 2011||Harder Craig E||Magnetic wear saving device|
|U.S. Classification||30/70, 30/346.59, 30/77, 30/69, 30/346.53, 30/123, 30/41.7, 30/346.52, 30/346.55|
|International Classification||B26B21/08, B26B21/18|