Clogging prevention device for liquid jet recording device

Abstract

Abstract PURPOSE:To eliminate unnecessary ink consumption and thereby prevent clogging in each nozzle for recording liquid properly by providing a counter to count the number of discharged dots for each nozzle of a printing head and adjusting the number of unloaded discharges for prevention of clogging depending on the content of the counter without deterioration of recording efficiency. CONSTITUTION:A counter (a) is provided which counts the number of discharges per nozzle individually on the basis of a recording signal which drives a nozzle (e). A control means (d) causes the nozzle (e) to be moved to a position outside a recording area by driving a carriage (f) in accordance with the results of comparison by a comparison means (c). Then, a propery amount of recording droplets (ink droplets) is permitted to be discharged from only the nozzle whose number of discharges is below a predetermined value, thus preventing the liquid ink from solidifying and clogging in the nozzle. The afore-mentioned proper amount of the recording droplets is in inverse proportion to the number of discharges. The position outside the recording area is, for instance, the position of a capping device for preventing of clogging.

Inventors

• 👤 Yoshihiro Nakagawa
• 👤 中川　義弘

Bibliographic Details