Razor be used on both sides, with two open edges. The blade on the double-edged safety razor is slightly curved to allow for a smoother and cleaner shave. In 1901, the American inventor King Camp Gillette, with the assistance of William Nickerson, patented a new variation of safety razor with disposable blades. Gillette realized that a profit could be made by selling an inexpensive razor with disposable blades. This has been called the razor and blades business model, and has become a very common practice for a wide variety of products. Many other brands of safety razors have come and gone.
Rolls Razor Rolls Razor Rolls Razor Limited was a British company known first for its manufacture of a sophisticated safety-razor and later, under new ownership, an "affordable" twin-tub washing machine. The eponymous product was a sophisticated safety-razor which promoted with the slogan "The razor that is stropped and honed in its case". The case was a rigid rectangular frame enclosed by two detachable lids, one lid carried a stone and the other a leather. The lids could not be interchanged. With a lid removed, oscillating a handle drove a shaft along the frame. In both directions pinions on the shaft engaged with