Title:
【発明の名称】インクジェットプリンタのための液体レベルセンサ
Document Type and Number:
Japanese Patent JPH10510353
Kind Code:
A
Abstract:
The ink level sensor of the invention comprises an ink container having a generally cylindrical shield extending downward from its top to define shielded and unshielded compartments within the container. Ink, but not foam, froth or mist, flows under the shield to the shielded compartment. A plurality of conductive rods of differing length extend downwardly into the shielded compartment from the container top. The rods are connected to an impedance network which provides signals representative of the ink level inside the container. A vacuum source can be connected to each compartment to maintain pressure equilibrium in the compartments and to prevent foam, froth or mist from entering the shielded compartment. Alternatively, a return pump is used to force ink into the container such that each compartment can be vented to the atmosphere.
Inventors:
Stemer Michael Elmer
Sharp Colin Richard
Sharp Colin Richard
Application Number:
JP51239896A
Publication Date:
October 06, 1998
Filing Date:
September 14, 1995
Export Citation:
Assignee:
Video Jet Systems International, Inc.
International Classes:
B41J2/175; G01F23/22; G01F23/24; (IPC1-7): G01F23/22; B41J2/175
Attorney, Agent or Firm:
Minoru Nakamura (6 outside)