Hitachi Metals, Ltd.

Dexerials Corporation

Hitachi Solutions, Ltd.

Ryo Nishimura

Takashi Saito

Hiroshi Tazawa

Fumihiko Iida

Hiroyuki Kiso

Hidetoshi Takahashi

Katsuya Kobayashi

Yu Nomura

Akihiro Maeta

Motoki Kamitani

Masahiko Mano

Provided is a slitter device capable of quickly supplying metal bands to a cutter stand and cutting same into strips with high speed and accuracy. The metal band slitter device comprises an unwinder that unwinds a metal band wound into a coil, a cutter stand that cuts the unwound metal band into narrow width strips, and a winder that winds the cut metal band into coils. The metal band slitter device is configured to comprise a tension adjustment unit on the winder side between the unwinder and the cutter stand that provides a constant tension to the metal band and a tension separating unit on the cutter stand side that separates the constant tension on the input side and tension on the output side.

Metal band slitter device and slitting method

A communication management method for managing communication made by a plurality of users with a computer including a processor, the computer being accessible to a storage device holding user management information including information on users participating in a community, group management information including information on groups to which the users belong, and community management information including information on the community, and the communication management method comprising steps of: registering, by the processor, in a case of receiving a request to let a group join a community from a client terminal, an administrative user of the group designated by the request to the user management information; registering, by the processor, the group designated by the request to the group management information; and registering, by the processor, the group designated by the request to the community management information, to allow users belonging to the group to participate in the community.

Communication management method and communication management system

An optical element with an antireflection function is provided with a substrate having a surface and a plurality of structures formed from convex portions or concave portions and arranged in large numbers on the surface of the substrate with a minute pitch less than or equal to the wavelength of the visible light, wherein the modulus of elasticity of the material forming the structures is 1 MPa or more, and 1,200 MPa or less, and the aspect ratio of the structure is 0.6 or more, and 1.5 or less.

Optical element and method for manufacturing optical element

Growing community of inventors

Tokyo, Japan

Ryo Nishimura