Kai R$d Center Co., Ltd.

Nagata Seiki Co., Ltd.

Shinmaywa Industries, Ltd.

Hiroshi Ohtsubo

Koichiro Akari

Kensuke Uemura

Kazuhiko Isogimi

Katsuaki Yamada

Hiroyuki Tashita

In a cutting edge of a razor blade, a non-nitrided layer containing Ti, Al, and Cr formed on opposite surfaces of a base plate as a portion of a coating layer. A remaining layer containing Ti, Al, Cr, and N formed on opposite surfaces of the non-nitrided layer as a portion of a nitrided layer of the coating layer. A surface layer containing Ti, Al, Cr, and N formed on opposite surfaces of the remaining layer as a portion of the nitrided layer of the coating layer. A fluororesin layer formed on opposite surfaces of the surface layer with a bonding layer containing Cr and Al in between. The coating layer further improves the cutting edge, enhances cutting performance of the cutting edge, and maintains the enhanced cutting performance to improve the durability of the cutting edge.

Coated cutting edge of a blade member

In a vacuum chamber, the edge of each blade group is subjected to an ion beam treatment under predetermined conditions using a plasma ion gun and argon as a medium, and is subjected to a plasma ion implantation of nitrogen plasma under predetermined conditions using a plasma ion implantation gun. As a result, it is possible to provide a blade member having an edge of a cutting quality enhanced by increasing the sharpness, a blade member having an edge of a rigidity enhanced by increasing the hardness, and a working apparatus capable of working those edges efficiently.

Blade member, and edge working apparatus for the blade member

A blade with improved sharpness and durability is disclosed. The blade includes a base plate having an edge and a coating layer for coating the edge. The coating layer is formed of a material handling metal, and a tip of the coating layer is sharpened. It is preferred that an angle (Ba) between two tapered surfaces be between 15 to 45 degrees.

Cutting blade and method of producing the same

A razor handle includes a hard section and a soft section integrally formed and overlapping each other. On the rear surface of a gripping section, a second rear contact section of the soft section is exposed and a finger applying concave section is formed at the upper section of the second rear contact section. On the front surface of the gripping section, the first front contact section of the hard section is exposed at the boundary section with a side surface, the second front contact section of the soft section is exposed between the first front contact sections at the both boundary sections, and a concave area is formed on the upper section of the second front contact section. On the side surface of the gripping section, the second side contact section of the soft section continues from the second rear contact section and is exposed at the boundary section with the rear surface, and the first side contact section of the hard section is continued from the first front contact section and is exposed at the boundary section with the front surface.

Growing community of inventors

Seki, Japan

Hiroshi Ohtsubo