Using method of rewritable board

Patent metadata

Field	Value
Publication number	US-11054922-B2
Application number	US-201916666745-A
Country	US
Kind code	B2
Filing date	Oct 29, 2019
Priority date	Oct 29, 2019
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

The present invention discloses a using method of a rewritable board. It comprises applying or removing a fluid on the rewritable board for writing repeatedly, wherein the rewritable board is an aluminum based material sequentially having a porous aluminum oxide layer and a metal layer thereon, and wherein the porous aluminum oxide layer has a porosity ranging from 10% to 80%.

First claim

What is claimed is:

1. A method of using a rewritable board, comprising applying or removing a fluid on the rewritable board for writing repeatedly, wherein the rewritable board is an aluminum based material sequentially having a porous aluminum oxide layer and a metal layer thereon, and wherein the porous aluminum oxide layer has a porosity ranging from 10% to 80%.

2. The method as claimed in claim 1 , wherein the fluid is water, alcohol, glycerol or silicon oil and filled in a writing pen.

3. The method as claimed in claim 2 , wherein the writing pen has a storage space for re-filling the fluid for writing.

4. The method as claimed in claim 1 , wherein the rewritable board is disposed on a heating plate or attached a heater for removing the fluid.

5. The method as claimed in claim 1 , wherein the metal layer is made by a metal material having a reflectivity larger than 70% and has a thickness ranging from 5 nm to 15 nm.

Assignees

• Univ Nat Cheng Kung

Inventors

• Chung Chen-Kuei
• Yu Chung-Yu

Classifications

• B43L1/00 Primary

  Repeatedly-usable boards or tablets for writing or drawing (drawing-boards B43L5/00) · CPC title

• C25D11/24

  Chemical after-treatment · CPC title

• C25D11/045

  for forming AAO templates · CPC title

• C25D11/10

  containing organic acids · CPC title

• G06F3/03545 Primary

  Pens or stylus · CPC title