Beifa Group Co., Ltd.

Ningbo Beifa Group Co., Ltd.

Zhiming Qiu

Yu Zhou

Chunmiao Ke

Junlin Tan

Yong Zhang

Lidan Ma

Yuemin Shi

Youbing Zhang

Jipeng Tai

Bin Lin

Debin Wei

Bin Li

Yong Fei

Liming Li

Li Bin

Lidang Ma

Junbo Mao

A casing for a writing instrument comprises an outer shaft, an inner shaft, and a nib. The outer shaft is formed using dual injection molding. An outer surface of the outer shaft includes a raised hard part and a raised soft part. The inner shaft is formed of a thin-wall tube having an upper end and a lower end, the inner shaft being configured for insertion inside the outer shaft. The inner shaft further includes a fastener protruding on its upper end that engages an upper end of the outer shaft. The nib is configured to engage the lower end of the inner shaft to help secure the inner shaft within the outer shaft. The raised hard or soft parts on the outer surface of the outer shaft may include an oblique loop-shaped part, a strip-shaped part, and/or an arc-shaped part.

Casing for a writing instrument and method of manufacturing the same using a dual injection molding

Casing for a writing instrument and method of manufacturing the same using dual injection molding

Dual-tip marker

A retractable writing device is provided that contains a nib airtight unit with a lid. The nib airtight unit with a lid includes an airtight body, an airtight lid, and/or an elastic loop. The nib airtight unit with a lid is capable of providing effective and durable airtight function for various shapes of nibs.

Airtight retractable writing device

Dual-tip pen/marker

Writing instrument

Highlighter

Growing community of inventors

Ningbo, China

Zhiming Qiu