Writing instrument
US-2015298489-A1 · Oct 22, 2015 · US
Writing tool refill and writing tool using same
US10569596B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10569596-B2 |
| Application number | US-201615752689-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 6, 2016 |
| Priority date | Oct 9, 2015 |
| Publication date | Feb 25, 2020 |
| Grant date | Feb 25, 2020 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A refill for a writing tool includes an ink containing tube that is made from a resin material and formed in a straight cylindrical shape, and a writing tip that is attached to an end of the ink containing tube. A press-fit portion, formed at the end of the ink containing tube, has a thickness being made thickened toward an inner circumferential surface and has an opening hole penetrating in an axial direction at a central portion of the press-fit portion. The writing tip or a relay member supporting the writing tip is press-fitted and attached to the press-fit portion. The refill for a writing tool can ensure a necessary and sufficient amount of ink stored without expanding an outer diameter of the ink containing tube, and sufficiently secure mechanical strength of an end portion, and a writing tool using the same can be provided.
First claim
Opening claim text (preview).
The invention claimed is: 1. A refill for a writing tool comprising: an ink containing tube that is made from a resin material and formed in a straight cylindrical shape; and a writing tip which is attached to an end of the ink containing tube, wherein a press-fit portion, of which thickness is made thickened toward an inner circumferential surface and which has an opening hole penetrating therethrough in an axial direction at a central portion of the press-fit portion, is formed at the end of the ink containing tube, the writing tip or a relay member supporting the writing tip is press-fitted and attached to the press-fit portion, and the press-fit portion is formed at each of both ends of the ink containing tube. 2. The refill for a writing tool according to claim 1 , wherein an abutment portion in which a shaft hole having a smaller diameter than the opening hole is bored is formed closer to the central portion of the ink containing tube in the press-fit portion. 3. A writing tool that contains the refill for a writing tool in a barrel, according to claim 1 . 4. The refill for a writing tool according to claim 1 , wherein the press-fit portion is integrally formed with the ink containing tube. 5. A writing tool that contains the refill for a writing tool in a barrel according to claim 4 . 6. The refill for a writing tool according to claim 1 , wherein an abutment portion in which a shaft hole having a smaller diameter than the opening hole is bored is formed closer to the central portion of the ink containing tube in the press-fit portion. 7. The refill for a writing tool according to claim 6 , wherein the press-fit portion is integrally formed with the ink containing tube. 8. A writing tool that contains the refill for a writing tool in a barrel according to claim 6 .
Assignees
Inventors
Classifications
Automatic machines · CPC title
- B43K7/02Primary
Ink reservoirs; Ink cartridges (B43K7/01 takes precedence) · CPC title
only one holder being used either for the pencil or the pen · CPC title
of ball-point pens · CPC title
with one push-button for each writing unit · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US10569596B2 cover?
- A refill for a writing tool includes an ink containing tube that is made from a resin material and formed in a straight cylindrical shape, and a writing tip that is attached to an end of the ink containing tube. A press-fit portion, formed at the end of the ink containing tube, has a thickness being made thickened toward an inner circumferential surface and has an opening hole penetrating in an…
- Who is the assignee on this patent?
- Mitsubishi Pencil Co
- What technology area does this patent fall under?
- Primary CPC classification B43K7/02. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Feb 25 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).