Evolution of The Double Edge Blade

AS A pre-teen, I wondered why my Dad’s double edge razor blades had that weird shape.  Was it simply an artistic design or was there some rational reason?  Other more interesting curiosities soon caught my attention and I forgot about the blade puzzle.  I discovered the answer only after I became addicted to safety razor collecting.  It turned out that the strange blade design was neither artistic nor rational. It was the outcome of a 1930 patent battle between the Gillette Company and an inventor named Henry J. Gaisman.

The story begins with the first 1904 Gillette patents that covered a safety razor and a unique double-edge throw-away blade that was so thin that it was flexible.

The 1906 Gillette blade looked like this:

The razor had a cap with a threaded stem and two studs that aligned with the three holes in the blade.  The illustration below is from a 1905 Gillette advertisement.  The threaded stem on the cap engaged the inner handle.  Rotating the end of the handle clamped the guard , the blade, and the cap together in a neat sandwich.  A slight twist of the handle could expose more or less of the blade edge as the cap sqeezed the flexible blade against the guard. The original 1903 three-hole blade design didn’t change for 25 years.  Then it went crazy.

In May 1921 Gillette introduced the NEW IMPROVED Gillette razor and blade.  When the original Gillette patents expired in November 1921, competitors were free to manufacture and sell blades that fit the nearly 15 million Gillette razors that had sold by then.  Gillette kept the original three-hole blade design, and launched a major advertising campaign that emphasized the superior quality of their blades over competitive imitations.

In 1928 Henry J. Gaisman founded the Probak Corp. as a division of his AutoStrop Safety Razor Co.  Probak started to manufacture razors and blades similar to Gillette’s.  Probak blades would work in both Probak and Gillette razors.  Probak razors, however, would notaccept Gillette blades. Instead of having round pins in the cap, the razors had a pair of depressions that accepted the variously shaped studs that were on the guard.  There were eight different guard designs with differently shaped studs.  In addition, the cap had corner blade-alignment pins that nested into depressions in the guard. The blade, in order to fit, had to have correctly placed openings to accept the protrusions and the corner pins.  A similar scheme had been used in the 1920s by Gaisman’s AutoStrop Company in a vain attempt to prevent competitors from making a blade that would fit the AutoStrop Valet single-edge razor.

Meanwhile (1929-1930), the Gillette Safety Razor Company was working on a similar razor and blade combination.  The old three-hole blades would not fit in the new NEW GILLETTE, but the new, patented, slotted blade would still work in all the old Gillette razors. The outcome was a patent fight that ended up with Gillette buying the AutoStrop Co.

Many creative cap and guard designs were made in the 1930s by Gillette and Probak (by then a division of Gillette). The Gillette variations were dubbed Goodwillrazors and they gave away 3 million of them free when you bought a $1 package of 10 New Gillette blades.  (See The Complete Gillette Collector’s Handbook, by Phillip L. Krumholz, pages 307, 402-404, and 234-240.)

Gillette Cap and Guard Designs

Gillette vs. Probak Timeline d> Dec. 1929

1928	April 1929	Nov. 1929	Mar 1930	May 1930	July 1930	Oct. 1930
Probak Company formed.	NEW GILLETTE patent filed (3-hole blade).	Probak blade Trademarks  filed.	Probak razor patent filed – includes slotted blade.	New Gillette Razor announced. Gillette slotted blade patent filed.	Revised Gaisman (Probak) patent filed.	NEW GILLETTE patent filed (slotted blade).	Merger of Gillette and AutoStrop.

Blade Evolution

The original.	Long slot and square, indented corners.	Added two transverse slots.	Added four transverse slots.	Added corner indents. One shape fits all.
1904-1928	1929	1931	1932	1933

Example Blade Packages
Dates determined from date code on blade

1904-05 3-hole (no date code)	1911               1921                1927 3-hole blades	1931 Long slot	1949             1953            1958           1959-60Blue Blades
WWII Camouflage Package	1938 Thin 1946 Thin		1958 Super Blue Sample 1967 Super Blue

The first blade wrapper was black and white and there was no inner wax-paper wrapper. The famous green package with King C. Gillette’s portrait first appeared in mid-1906 and subliminally reminded one of  U.S. currency. This “banknote” design lasted until the depression. The New Gillette blade had a long slot instead of three holes. The rust-resistant oxidized Blue Blade was introduced in April of 1932.  In the late ’30s the Thin Blade with a brown surface finish had a red wrapper that was missing the Gillette visage. The Super Blue blade came out in the late ’60s and KCG’s picture shrank to insignificance and then disappeared altogether. Around 1948 Blue Blades began to be packaged in double-ended plastic dispensers.  The blades were marked with arrows to indicate which way the blade was to be pushed to slide it from the dispenser. Blades that were sold in the traditional packages in the early 1950s  may or may not have had the arrows.  In the mid-60s competition from Wilkinson Sword of England forced Gillette to go stainless.

To learn how to determine the date of manufacture of Gillette blades click here.
Henry J. Gaisman vs. The Gillette Company

Business Week magazine of Nov. 26, 1930 described Henry Gaisman as “… of medium height, of benign mien.  He lives in a Park Avenue apartment in a state of contented batchelorhood.  … He has voiced doubts as to whether any woman could live with him.  The doubt applies to unconventional working habits and not to personal disposition.  If he gets an idea in the middle of the night there is no more sleep for him.  Like Gillette, Gaisman is an incurable inventor.  Also like Gillette, Gaisman possesses a quality notoriously lacking in most inventors– shrewd executive ability.”

The showdown between Gaisman and the Gillette Company came in 1930. The story is well told by Russell Adams in his book, King C. Gillette (Little, Brown, 1978) and in the pages of Business Week magazine during the fall of 1930, but it is worth summarizing here. In January of 1930, AutoStrop and Gaisman’s two-year old Probak Company had been granted a patent and trademarks on several razor blade slot designs.  One of which was identical to the New Gillette blades (marked PATENTS PENDING) that were introduced the next month.  AutoStrop threaten to sue and the Gillette Company charged that Gaisman had swiped their ideas.  By the end of the year Gaisman had marketed Probak razors and blades bearing three separate patent numbers. Probak was a made-up name ( inspired, perhaps, by Kodak? ), and reportedly was chosen by AutoStrop because it was likely to be pronounced the same in any language.

Top: Probak’s Trademark –
Jan. 7, 1930, filed Nov. 25, 1929. Bottom: Gillette’s Patent –
Aug. 5, 1930, filed Mar. 19, 1930.

Gillette decided that it would be easier to buy the AutoStrop Company rather than fight them in the courts.  Finally, in November of 1930, AutoStrop merged with Gillette. Henry Gaisman emerged as chairman of the board and “the new head man” of Gillette.  Business Week reported that during merger negotiations the question was asked why Gillette should pay $20 million for AutoStrop whose assets were only worth $9 million. The AutoStrop spokesman was said to have replied: “But, gentlemen, I have a patent on your product!”