Cosmetic applicator
US-2022061496-A1 · Mar 3, 2022 · US
Writing instrument
US9636940B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9636940-B2 |
| Application number | US-201314647925-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 3, 2013 |
| Priority date | Dec 4, 2012 |
| Publication date | May 2, 2017 |
| Grant date | May 2, 2017 |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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Abstract
Official abstract text for this publication.
Provided is a writing instrument suited to ballpoint pens, marking pens and the like in which a flow pressure of an ink applied to a pen tip is controlled to a fixed level to prevent an ink direct flow phenomenon reverse flow phenomenon. The above writing instrument comprises a pen tip disposed at a front part of an ink tank, an ink received in the ink tank, a follower filled at a rear part of the ink, and a capillary porous member provided with a capillary force, which is arranged at a space part between a rear part of the follower and a rear end part of the ink tank in a state in which the follower is filled, wherein the pen tip is sealed when a cap is put on the writing instrument.
First claim
Opening claim text (preview).
What is claimed is: 1. A writing instrument comprising a pen tip disposed at a front part of an ink tank, an ink received in the ink tank, a follower filled at a rear part of the ink, and a capillary porous member provided with a capillary force by impregnating the porous member with a liquid, which is arranged at a space part between a rear part of the follower and a rear end part of the ink tank in a state in which the follower is filled, wherein a capillary force provided at a pen tip side is larger than a total of an own weight of the ink and the capillary force at a rear part of the writing instrument, and the pen tip is sealed when a cap is put on the writing instrument. 2. A writing instrument comprising a pen tip disposed at a front part of an ink tank, an ink received in the ink tank, a follower filled at a rear part of the ink, and a capillary porous member provided with a capillary force by impregnating the porous member with a liquid, which is arranged at a space part between a rear part of the follower and a rear end part of the ink tank in a state in which the follower is filled, wherein the capillary porous member is brought into contact with a member having a slit part; a capillary force provided at a pen tip side is larger than a total of an own weight of the ink and the capillary force at a rear part of the writing instrument; and the pen tip is sealed when a cap is put on the writing instrument.
Assignees
Inventors
Classifications
pressurised, e.g. by gas · CPC title
Arrangements for feeding the ink to the writing-points · CPC title
Arrangements for feeding the ink to the nibs · CPC title
Ink reservoirs; Ink cartridges (B43K7/01 takes precedence) · CPC title
for low viscosity liquid ink · CPC title
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Frequently asked questions
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- What does patent US9636940B2 cover?
- Provided is a writing instrument suited to ballpoint pens, marking pens and the like in which a flow pressure of an ink applied to a pen tip is controlled to a fixed level to prevent an ink direct flow phenomenon reverse flow phenomenon. The above writing instrument comprises a pen tip disposed at a front part of an ink tank, an ink received in the ink tank, a follower filled at a rear part of …
- Who is the assignee on this patent?
- Mitsubishi Pencil Co
- What technology area does this patent fall under?
- Primary CPC classification B43K23/12. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue May 02 2017 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).