Keyboard device and cooling method of drive device
US-2024169964-A1 · May 23, 2024 · US
Keyboard musical instrument
US9520107B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9520107-B2 |
| Application number | US-201414479617-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 8, 2014 |
| Priority date | Sep 10, 2013 |
| Publication date | Dec 13, 2016 |
| Grant date | Dec 13, 2016 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
Provided is a keyboard musical instrument such as an acoustic piano or an electronic piano having an appearance and design similar to an acoustic piano, in which a fall board is made of a resin plate-shaped body, and hollow portions are provided inside the plate-shaped body. In addition, the plate-shaped body includes a plate-shaped resin foamed plate portion, and the hollow portions are made of plural air bubbles contained inside the resin foamed plate portion.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of manufacturing a fall board, the method comprising: mixing a foaming agent, which produces gas when being heated, with a base resin to form a mixed resin material; supplying the mixed resin material to a molding die; heating the molding die to allow a plurality of air bubbles to be formed inside the mixed resin material and to thereby obtain a resin foamed plate having a plurality of hollow portions therein; and laminating a resin surface layer on a surface of the resin foamed plate. 2. The method of manufacturing a fall board according to claim 1 , wherein the base resin is an ABS resin. 3. The method of manufacturing a fall board according to claim 1 , wherein the foaming agent is sodium bicarbonate. 4. The method of manufacturing a fall board according to claim 1 , wherein the resin surface layer is made of an ABS resin.
Assignees
Inventors
Classifications
ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers · CPC title
Musical equipment · CPC title
containing compounding ingredients (releasing, lubricating or separating agents B29C33/56, fibers B29K2105/08, B29K2105/12; fillers B29K2105/16, recycled material B29K2105/26) · CPC title
cellular or porous · CPC title
- G10C3/02Primary
Cases · CPC title
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- What does patent US9520107B2 cover?
- Provided is a keyboard musical instrument such as an acoustic piano or an electronic piano having an appearance and design similar to an acoustic piano, in which a fall board is made of a resin plate-shaped body, and hollow portions are provided inside the plate-shaped body. In addition, the plate-shaped body includes a plate-shaped resin foamed plate portion, and the hollow portions are made o…
- Who is the assignee on this patent?
- Yamaha Corp
- What technology area does this patent fall under?
- Primary CPC classification G10C3/02. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Dec 13 2016 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).