Title:
WRITING IMPLEMENT PART, METHOD FOR MANUFACTURING WRITING IMPLEMENT PART, AND WRITING IMPLEMENT
Document Type and Number:
WIPO Patent Application WO/2024/038890
Kind Code:
A1
Abstract:
Provided is a writing implement part that enhances the releasability of a core pin. In a writing implement part according to the present invention: through insert molding in which a wood shaft material made of natural wood flour and a water-soluble resin binder is injected into a mold, the wooden shaft material and a core pin having a paper straw inserted thereinto are integrated; and a two-layer structure having a paper straw layer 5f as an inner layer and a wood shaft layer (layers of a joint portion 5c, a cylindrical portion 5d, and a tapered portion 5e) as an outer layer is formed by releasing the core pin.
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Inventors:
FUJISAWA KIYOSHI (JP)
KUBO RYOTA (JP)
KUBO RYOTA (JP)
Application Number:
PCT/JP2023/029684
Publication Date:
February 22, 2024
Filing Date:
August 17, 2023
Export Citation:
Assignee:
MITSUBISHI PENCIL CO (JP)
International Classes:
B29C45/14; B29C45/16; B43K7/00
Foreign References:
| JP2014043077A | 2014-03-13 | |||
| JP2010105325A | 2010-05-13 | |||
| JP2008105311A | 2008-05-08 | |||
| JPS5663414A | 1981-05-30 | |||
| JP2019115989A | 2019-07-18 | |||
| JP2015231702A | 2015-12-24 |
Attorney, Agent or Firm:
KINOSHITA Shigeru (JP)
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