Apparatus for removing excess developer particles on the surface of a recording element
AssigneeCompagnie Internationale pour l'Informatique CII-Honeywell Bull (Societe Anonyme)
InventorsJean-Jacques Binder, Bernard Cherbuy
Life of this patent
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Abstract
The invention relates to a device that permits removal of excess developer particles on the surface of a recording element and comprises a suction conduit (22) having at one end a port (23) in the form of a slot and at its other end a cylindrical chamber (25) which communicates with said conduit. The generators of the chamber run parallel to the port (23). The chamber includes a suction port (32) which is connected to a suction source, and an air inlet port (31) which discharges into the free atmosphere (31).
Claims20
In a device for removing excess developer particles adhering to a surface upon which a powdery developer has been deposited, said device comprising:
- a suction conduit (22) having a port at each of two terminations, one of said ports being a first air inlet port (23) shaped in the form of a slot and running parallel to said surface in the immediate vicinity thereof, the other port being an air outlet port (24);
- and a cylindrical chamber (25) integral with said suction conduit (22), and located at said outlet port (24) with an axis running parallel to the direction of elongation (AA') of said first inlet port (23), said cylindrical chamber having side walls (29, 30) one of which (29) has a suction port (32) communicating with a suction source (35), said chamber (25) further having on its cylindrical wall (28) a port (36) which corresponds to the air outlet port (24) of said suction conduit;
- the improvement comprising the other of said side walls (30) of said chamber (25) having a second air inlet port (31) communicating with the atmosphere, and wherein the ratio of the cross-sectional area of said first air inlet port (23) to that of said suction port (32) ranges from 0.3 to 0.7 and the ratio of the cross-sectional area of said first air inlet port (23) to that of said second air inlet port (31) ranges from 2 to 20.
Dependencies are inferred from the claim text.