CPC B41J 2/17509 (2013.01) [B41J 29/38 (2013.01); G03G 15/0894 (2013.01); G03G 21/181 (2013.01)] | 15 Claims |
1. A device to supply printing material to a printing material container in a printing apparatus, the device comprising:
a first container to contain printing material;
a first piston movable in the first container to exert first pressure to discharge printing material contained in the first container from the first container;
a second container having an opening to the first container; and
a second piston movable in the second container to exert second pressure higher than the first pressure to form a pressure gradient based on the first pressure and the second pressure through the opening, the pressure gradient to disperse printing material in the first container.
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