Claims
- 1. An apparatus for developing a latent electrostatic image on a receptor member by directing toner material thereto, comprising:
- a magnetically recordable donor member having a path of travel spaced apart from said receptor member by a distance of from about 0.005 to about 0.010 inches; means for magnetically recording a multiplicity of magnetic poles on said magnetically recordable donor member, adjacent magnetic poles being spaced apart on the order of about 0.010 inches and of opposite magnetic polarity; means for contacting the magnetically recorded donor member with magnetic toner to form thereon an about 1 to about 2 mils thick uniform layer of magnetic toner on said magnetically recorded donor member; and means for substantially uniformly maintaining the separation distance of from about 0.005 to about 0.010 inches between said receptor member and said donor member to define a development zone.
- 2. The apparatus of claim 1 further including means for magnetically erasing said magnetically recordable donor member intermediate said development zone and said magnetic recording means.
- 3. The apparatus of claim 2 further including means for neutralizing electrostatic charge on toner borne by said magnetically recordable donor member intermediate said development zone and said magnetic erasing means.
- 4. The apparatus of claim 3 further including means for electrostatically charging toner material borne by said magnetically recordable donor member intermediate said development zone and said means for contacting said magnetically recordable donor member with magnetic toner.
Parent Case Info
This is a division of application Ser. No. 556,249, filed Mar. 7, 1975 now abandoned.
US Referenced Citations (6)
Foreign Referenced Citations (2)
Number |
Date |
Country |
1,196,962 |
Jul 1965 |
DT |
47-14677 |
May 1972 |
JA |
Divisions (1)
|
Number |
Date |
Country |
Parent |
556249 |
Mar 1975 |
|