| 摘要 |
PURPOSE:To eliminate the occurrence of a bending in the flying direction of ink droplets and faulty ink ejection at low temperatures by arranging a nozzle front having a plate thickness of 280-360mum on an on-demand type ink jet printer. CONSTITUTION:A printing head substrate 1 is drilled obliquely or is formed by an injection molding method so that a plate t1+t2 on the front of a nozzle on an ink jet head substrate 1 may be 280-360mum thick. If this is used, a bending of a flying ink droplet course by an ink well in the nozzle front 10 or faulty ink ejection does not occur within a use range of temperatures 0-55 deg.C regardless of whatever printing response frequencies or cycles. Especially, if the viscosity increases significantly at 0 deg.C to reach 5.7cp, no meniscus of an ink layer generates on the nozzle front 10, thereby a faulty ink ejection is not caused. |
