Inkjet printhead formed to eliminate ink trajectory errors

Details Inkjet printhead formed to eliminate ink trajectory errors Inkjet printhead formed to eliminate ink trajectory errors

1993-10-05

1995-11-14

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

B41J 214

Patent

active

054671159

ABSTRACT:
A method is provided to eliminate ink trajectory errors when an inkjet printhead is fabricated as described below. In a preferred embodiment, a nozzle member containing an array of orifices is affixed to a barrier layer formed on a substrate, the substrate having heater elements formed thereon. The nozzle member is affixed to the barrier layer using heat and pressure. Each orifice in the nozzle member is associated with a single heating element formed on the substrate. The back surface of the nozzle member extends beyond the outer edges of the substrate. During the heating and pressure step used to affix the nozzle member to the barrier layer, the nozzle member undesirable bends over the outer edges of the barrier layer, causing the nozzles to be tilted outward. In one embodiment to prevent this bending from skewing the nozzles, the nozzles are initially formed at a slight inward angle to compensate for the subsequent bending of the nozzle member. In another embodiment, the barrier layer is formed with one or more trenches parallel to the long edges of the barrier layer to cause the nozzle member to dip and bend over the trenches. The nozzles are located at the crest of the nozzle member and, thus, remain normal to the surface of the printhead.

REFERENCES:
patent: 5305018 (1994-04-01), Schantz et al.

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