Abstract: The invention is an apparatus and method for periodically applying a hydrophobic coating layer to a face of an ink jet printing head to prevent droplets of ink from clogging nozzles of the printing head. An ink jet printer embodying the invention includes a hydrophobic material applicator that moves relative to the printing head to deposit hydrophobic material on the face of the ink jet printing head. The applicator may be a wiper blade or cylinder made from a hydrophobic material or embedded with a hydrophobic material, wherein the applicator contacts the face of the printing head during relative movement to transfer hydrophobic material to the printing head. The applicator may also be a spray head that sprays hydrophobic material onto the face of the printing head during relative movement.

Abstract: An ink manifold is integrally formed with an elastomeric channel plate by a two-step injection molding process. The manifold can include posts for attachment to a heat sink upon which is secured a heater plate containing a plurality of heater elements which are located in corresponding channels of the elastomeric channel plate. The elastomeric channel plate eliminates the need to secure the channel plate to the manifold and heater plate using adhesives.

Abstract: An ink manifold is integrally formed with an elastomeric channel plate by a two-step injection molding process. The manifold can include posts for attachment to a heat sink upon which is secured a heater plate containing a plurality of heater elements which are located in corresponding channels of the elastomeric channel plate. The elastomeric channel plate eliminates the need to secure the channel plate to the manifold and heater plate using adhesives.