Ink reservoir unit for writing instruments and writing instruments
US-2022176728-A1 · Jun 9, 2022 · US
Liquid storage member for coating tools
US11780258B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11780258-B2 |
| Application number | US-202017624091-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 10, 2020 |
| Priority date | Jul 19, 2019 |
| Publication date | Oct 10, 2023 |
| Grant date | Oct 10, 2023 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
Provided is a liquid storage member for coating tools which successfully reduces plastic consumption and reduces environmental loads, by making use of materials based on paper in place of plastics such as polypropylene that has been used for liquid (e.g., ink) storage members. A liquid storage member for coating tools having at least three layers of a paper base laminate composed of an inner layer made of paper base material, and a middle layer of a metal layer or a silica deposition layer, formed on the outer peripheral side of the inner layer; and an outer layer made of the paper base material formed on the outer peripheral side of the middle layer, wherein the paper base material of the inner layer has a density of 0.8 g/cm3 or more.
First claim
Opening claim text (preview).
The invention claimed is: 1. A liquid storage member for coating tools having at least three layers of: a paper base laminate composed of an inner layer made of paper base material, and a middle layer of a metal layer or a silica deposition layer, formed on the outer peripheral side of the inner layer, and an outer layer made of the paper base material formed on the outer peripheral side of the middle layer, wherein the paper base material of the inner layer has a density of 0.8 g/cm 3 or more. 2. The liquid storage member for coating tools according to claim 1 , wherein the paper base material of the inner layer is glassine paper, parchment paper, or vulcanized fiber. 3. The liquid storage member for coating tools according to claim 1 , having structures in which the paper base laminate is spirally wound, and the outer layer made of the paper base material is spirally wound around the outer peripheral side of the middle layer. 4. The liquid storage member for coating tools according to claim 3 , having structures in which along the lengthwise direction of the liquid storage member for coating tools, the paper base laminate is spirally arranged for the adjacent portions to come into contact but not to be overlapped with each other, and the outer layer made of the paper base material is spirally arranged for the adjacent portions to come into contact with each other. 5. The liquid storage member for coating tools according to claim 1 , having two or more of the paper base laminates. 6. The liquid storage member for coating tools according to claim 3 , wherein the contact portion between the paper base laminates and the contact portion between the outer layers made of the paper base material are arranged apart from each other by 1 mm or more and a half or less of the width of the paper base laminate or the outer layer made of the paper base material along the lengthwise direction of the liquid storage member for coating tools. 7. The liquid storage member for coating tools according to claim 1 , being a paper refill for a writing tool.
Assignees
Inventors
Classifications
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11780258B2 cover?
- Provided is a liquid storage member for coating tools which successfully reduces plastic consumption and reduces environmental loads, by making use of materials based on paper in place of plastics such as polypropylene that has been used for liquid (e.g., ink) storage members. A liquid storage member for coating tools having at least three layers of a paper base laminate composed of an inner la…
- 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 Oct 10 2023 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).