Claims
- 1. In a method of moving particles of developer material in an electrostatic printing machine to ensure adequate mixing thereof, including forming a curtain of the material and cascading it downwardly into a sump from whence the particles are raised upwardly to be formed again into said curtain, and deflecting the particles so that one portion of said particles are shifted in one lengthwise sense along a lengthwise portion of said curtain and another portion of said particles are shifted along another lengthwise portion of said curtain in an opposite lengthwise sense just prior to said forming of said curtain, the improvement in which certain of said particles adjacent each portion of said curtain are removed prior to said formation of said curtain and are moved to a section of said sump below the other portion of said curtain.
- 2. A method according to claim 1, in which said particles are deflected so that they are shifted outwardly along each portion of said curtain from a mid-section of said curtain, and said removed particles are removed adjacent opposite ends of said curtain and are moved to a mid-section of said sump.
- 3. A method according to claim 2, in which said moved particles are directed into said mid-section of said sump in a direction toward the opposite end of said curtain from whence said moved particles originated.
- 4. A method according to claim 1, in which said removed particles are removed at the terminus of shifting movement along each portion of said curtain and are moved to a section of said sump below the beginning of shifting movement along the other portion of said curtain.
Parent Case Info
This is a division, of application Ser. No. 120,907 filed Feb. 12, 1980, U.S. Pat. No. 4,361,109.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3943887 |
Smith |
Mar 1976 |
|
4075977 |
Williams |
Feb 1978 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
120907 |
Feb 1980 |
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