Incremental printing of symbolic information – Ink jet – Ejector mechanism
Patent
1996-03-06
1999-12-21
Wong, Peter S.
Incremental printing of symbolic information
Ink jet
Ejector mechanism
347 71, 392441, 219216, B41J 221, B41J 2045, A47J 2700, H05B 100
Patent
active
06003971&
ABSTRACT:
An ink jet array print head (101) includes four media-width linear ink jet arrays (100). Ink flows from four sets of manifolds (106) through acoustically matched inlet filters (116), inlet ports (117), inlet channels (118), pressure chamber ports (120), and ink pressure chambers (122). Ink leaves the pressure chambers through outlet ports (124) and flows through oval outlet channels (128) to orifices (108), from which ink drops (110) are ejected. The ink pressure chambers are bounded by flexible diaphragms (130) to which piezo-ceramic transducers (132) are bonded. To minimize inter-jet cross-talk caused by pressure fluctuations in the manifolds, compliant walls (150) form one wall along the entire length of each manifold. An improved ink feed system (210) supplies four colors of ink to the print head. Phase-change inks are melted and deposited in ink catch basins (202), funneled into ink storage reservoirs (204), and fed to the print head through ink stack feeds (206) having substantially equal lengths and cross-sectional areas to improve jetting uniformity. Manifold tapering, inlet port positioning, and an elevationally upward slope of the ink stack feeds enhances purgeability of the ink feed system and the ink jet print head.
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Alavizadeh Nasser
Berger Sharon S.
Burr Ronald F.
Hanks David W.
MacLane Donald B.
D'Alessandro Ralph
Tektronix Inc.
Vu Bao Q.
Wong Peter S.
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