US 12,227,024 B2
Writing implement
Hirotake Izawa, Tokyo (JP); Toshimi Kamitani, Tokyo (JP); Chihiro Mochizuki, Tokyo (JP); and Kaito Tsukada, Tokyo (JP)
Assigned to MITSUBISHI PENCIL COMPANY, LIMITED, Tokyo (JP)
Appl. No. 18/264,849
Filed by MITSUBISHI PENCIL COMPANY, LIMITED, Tokyo (JP)
PCT Filed Feb. 9, 2022, PCT No. PCT/JP2022/005060
§ 371(c)(1), (2) Date Aug. 9, 2023,
PCT Pub. No. WO2022/172946, PCT Pub. Date Aug. 18, 2022.
Claims priority of application No. 2021-019902 (JP), filed on Feb. 10, 2021.
Prior Publication US 2024/0051329 A1, Feb. 15, 2024
Int. Cl. B43K 8/06 (2006.01); B43K 1/00 (2006.01); B43K 8/02 (2006.01); B43K 8/03 (2006.01); B43K 27/08 (2006.01)
CPC B43K 8/06 (2013.01) [B43K 1/003 (2013.01); B43K 1/006 (2013.01); B43K 8/02 (2013.01); B43K 8/03 (2013.01); B43K 27/08 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A writing implement comprising: a pen tip that feeds ink from a writing implement body and has a viewer portion allowing visual recognition in a writing direction, the pen tip comprising: at least,
a writing part;
a retainer having the viewer portion; and
an ink feeder portion for feeding the ink from the writing implement body to the writing part,
wherein the minimum width of the viewer portion is 3.7 mm or greater and a length of the viewer portion is 7.4 mm or greater,
wherein the ink feeder portion is formed into a thin-plate-like shape,
wherein a depressed retaining groove is formed on a bottom surface of the retainer, and
wherein the ink feeder portion is fitted and held into the depressed retaining groove formed on the bottom surface of the retainer.