Gas assisted ink jet apparatus and method

Details Gas assisted ink jet apparatus and method Gas assisted ink jet apparatus and method

1996-02-28

1998-08-25

Poller, Benjamin K.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 70, B41J 2015

Patent

active

057987742

ABSTRACT:
A gas assisted liquid jet apparatus, suitable for use in ink jet printers, includes a transducer housing having a plurality of ink passages and is designed to be used with solid or hot melt ink. The apparatus operates with a compressed air source to provide a laminar air flow through an orifice from where ink is ejected. As a result, ink ligaments and droplets uniformly accelerate toward the printing medium, and the high speed laminar flow reduces friction at the orifice, thus reducing the formation of ink ligaments or satellite droplets. The apparatus may be made by attaching different layered members together. This improves the efficiency and ease of fabrication of multiple array liquid jet apparatus. Because of the layered structure, ink passages and air chambers each may be placed in a selected layered member or in more than one layered member. The location of the ink passages in the same layer or structure, such as the transducer housing, as a heater provides improved heating capabilities. The location of the ink passages in the transducer housing also minimizes the overall width of the apparatus.

REFERENCES:
patent: 4417259 (1983-11-01), Maeda
patent: 4418355 (1983-11-01), DeYoung
patent: 4598303 (1986-07-01), Peekema et al.
patent: 4728969 (1988-03-01), Le et al.

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