Front face erasable microcapsule magnetophoretic display sheet, erasing magnet and writing magnet
US7070856B2 · kind B2 · utility
0Cited by
5References
23Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 18, 2002 |
| Grant date | Jul 4, 2006 |
| Priority date | — |
| Expiry date | Dec 18, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/32
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Disclosed herein is a front face erasable microcapsule magnetophoretic display sheet having a support and a solid dispersion layer provided on one surface of the support and composed of microcapsules having an average particle diameter of 50 to 650 μm, in which a liquid dispersion, a white pigment, additives and magnetic particles are encapsulated, and a binder. The magnetic particles include at least two kinds of magnetic particles different in particle diameter from each other. An erasing magnet for front face erasing and a writing magnet for front face erasable microcapsule magnetophoretic display sheet are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.