A laminar air flow passageway through which ink droplets are directed before striking a moving print medium, having a portion of the passageway contoured to expand toward the print medium for slowing a column of air passing therethrough before the column reaches the document. Air suction apertures located...http://www.google.com.au/patents/US3972051?utm_source=gb-gplus-sharePatent US3972051 - Air turbulence control of inflight ink droplets in non-impact recorders
