Title:
ENGRAVING NEEDLE FOR SEAL AND METHOD FOR FORMING HARD COAT ON ENGRAVING NEEDLE FOR SEAL
Document Type and Number:
Japanese Patent JP2002036791
Kind Code:
A
Abstract:
To largely reduce friction resistance during engraving, and prevent an engraving needle from being broken during manufacturing of a seal, while drastically enhancing durability of an engraving needle for a seal.
A cutting blade part 13 set at a tip side of a main body part contacts and engraves a seal material. At least a base material 10 of the cutting blade part 13 consists of alloy tool steel or sintered hard alloy. On a surface of the cutting blade 13 a diamond-like carbon coat is formed through an intermediate layer 20 which enhances adhesion with the base material.
Inventors:
MIYA YUKIO
KASAI HIDEFUMI
IDO YUKIO
OKUBO HIDEO
KASAI HIDEFUMI
IDO YUKIO
OKUBO HIDEO
Application Number:
JP2000231579A
Publication Date:
February 06, 2002
Filing Date:
July 31, 2000
Export Citation:
Assignee:
CITIZEN WATCH CO LTD
WAKO TRADING CO LTD
WAKO TRADING CO LTD
International Classes:
B44B3/02; C23C14/06; C23C14/16; C23C16/27; C23C16/56; C23C28/00; (IPC1-7): B44B3/02; C23C14/06; C23C14/16; C23C16/27; C23C16/56; C23C28/00
Attorney, Agent or Firm:
Kei Osawa
Previous Patent: CONTAINER FOR SOLID GLUE
Next Patent: FLEXIBLE TRANSFER SHEET AND METHOD FOR FORMING IMAGE ON CURVED SURFACE USING IT
Next Patent: FLEXIBLE TRANSFER SHEET AND METHOD FOR FORMING IMAGE ON CURVED SURFACE USING IT