Conical NIB and writing instrument using the same

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8801314
SERIAL NO

13223773

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A nib piece with high roundness is obtained in the following manner: in the forming of the nib piece, a punched hole is formed in a base portion of a punched plate which is to be bent; the base portion of the punched plate is bent and shaped into a tubular structure; a pipe member which is aligned with and accommodated in the tubular body, is disposed in an inner portion of the base portion of the punched plate having been bent; and the punched plate is shaped to obtain a structure to wrap an outer periphery of the pipe member. The punched plate includes an engageable joint portion, such as a protrusion and a recess, which engage each other and form a hooked edge when the punched plate is bent into a cylindrical form.

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Patent Owner(s)

Patent OwnerAddress
YAMANAKA KAZUE4-15-33-904 SHIMO-RENJAKU MITAKA-SHI TOKYO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Yamanaka, Shizuo Mitaka, JP 16 66

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