Recording head and image recording apparatus utilizing said recording head
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jan 7, 2003
Grant Date -
N/A
app pub date -
Oct 24, 2000
filing date -
Oct 29, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In an electrostatic acceleration type ink jet recording apparatus, when a voltage is preliminarily applied to ink to adjust the width of ink raises, a dedicated drive circuit has been necessary or dedicated electrodes have been necessary for forming the ink raises. According to a recording apparatus of the present invention, machining such as chamfering or steps is provided to a support body having a slit-like opening portion or, alternatively, a surface treatment such as coating an oil repellent solvent to a portion to be machined. Due to such a constitution, the width of the ink raises in the lateral direction of the opening portions can be made constant without using a method such as an electric driving so that a stable printing of dots is ensured. Further, by increasing the ink raise width in the vicinity of a central portion of the opening portion than at end portions of the opening portion, it becomes possible to prevent the diameter of dots to be printed from becoming non-uniform in the longitudinal direction of the opening portion.
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