Stand expanding-and-contracting Mill and the grant method of pre stress provided with a pre stress device and this - Nippon Steel & Sumikin Engineering Co., Ltd.

Title:

Stand expanding-and-contracting Mill and the grant method of pre stress provided with a pre stress device and this

Document Type and Number:

Japanese Patent JP6226818

Kind Code:

B2

Inventors:

Kiyoshi Suda
Kentaro Shinbo

Application Number:

JP2014114956A

Publication Date:

November 08, 2017

Filing Date:

June 03, 2014

Export Citation:

Assignee:

Nippon Steel & Sumikin Engineering Co., Ltd.

International Classes:

B21B31/04; B21B13/10

Domestic Patent References:

Foreign References:

US20090158802

Attorney, Agent or Firm:

Fujio Nakamae
Yohei Kiyoi
Yoshihiro Kurita

Previous Patent: Paddy field work machine

Next Patent: BLOW-MOLDING METHOD