Front face erasable microcapsule magnetophoretic erasing magnet

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.

1 - 5 . (canceled)  
   
   
       6 . An erasing device for front face erasing, which is adapted to slide over at least a part of the associated front face of an associated front face erasable microcapsule magnetophoretic display sheet, wherein the device comprises: 
 at least one magnetic portion;    at least one non-magnetic portion, the non-magnetic portion adapted to control the generation of a magnetic field, the non-magnetic portion being a non-magnetic material; and,    wherein the arrangement of the magnetic and non-magnetic portions in relation to each other creates a magnetic field comprising multiple magnetic lines, wherein portions of the magnetic lines are almost horizontally acting on the magnetic portion at a position somewhat distant from the magnetic portion.    
   
   
       7 . (canceled)  
   
   
       8 . The device of  claim 6 , wherein the type of magnetization of the magnetic portion is double-sided magnetization IP.  
   
   
       9 . The device of  claim 8 , wherein the magnetic portion further comprises a surface magnetic flux density of 100 to 750 G.  
   
   
       10 - 11 . (canceled)  
   
   
       12 . The device of  claim 6 , wherein the magnetic portion is selected from rare earth cobalt magnet, rare earth iron magnet, bond magnet, isotropic rare earth magnet, anisotropic rare earth magnet, or ferrite magnet.  
   
   
       13 - 42 . (canceled)