Printing head for ink jet printers

Claim 1

A printing head for ink jet printers, comprising a plurality of tubular nozzle ducts, each of which has associated with it a drive member for the droplet-wise ejection of ink droplets at appropriate instants, the ink being applied thereto via a common distribution duct and individually associated damping members, each nozzle duct with its drive member forming a separate, operational droplet generator, the droplet generators being accommodated in a first block and the common distribution duct being accommodated in a second block, said blocks being preferably made of a plastic material, and being interconnected, characterized in that: the nozzle ducts (1) are constructed to be integral with their ejection nozzles (3) as well as with their damping members (4); the nozzle ducts (1) opening perpendicularly into the distribution duct (17); the nozzle ducts being bent in the zone between the drive members (2) and the ejection nozzles (3) such that they extend parallel to one another in the other zones; their distance at the area of the ejection nozzles (3) being determined by the required distance between the ink droplets which are mosaic-wise deposited on the record carrier and at the rear area by the dimensions of the drive members (2).

Claim 9

A method of manufacturing a printing head for ink jet printers, comprising a plurality of tubular nozzle ducts, each of which has associated with it a drive member for the droplet-wise ejection of ink droplets at appropriate instants, the ink being applied thereto via a common distribution duct and individually associated damping members, each nozzle duct with its drive member forming a separate, operational droplet generator, the droplet generators being accommodated in a first block and the common distribution duct being accommodated in a second block, said blocks being preferably made of a plastic material, and being interconnected, comprising the steps of: obtaining the predetermined shape for each nozzle duct (1) and providing it with a drive member (2); testing each nozzle duct for suitable operation and droplet emission; aligning each nozzle duct in a mount (12) and encapsulating it in a first plastic block (10); cutting the first plastic block (10) at its rear to be perpendicular to the ends of the nozzle ducts (1); and connecting it to the distribution duct (17) which is encapsulated in a second plastic block (15).

Claim 10

A method of manufacturing a printing head for ink jet printers, comprising a plurality of tubular nozzle ducts, each of which has associated with it a drive member for the droplet-wise ejection of ink droplets at appropriate instants, the ink being applied thereto via a common distribution duct and individually associated damping members, each nozzle duct with its drive member forming a separate, operational droplet generator, the droplet generators being accommodated in a first block and the common distribution duct being accommodated in a second block, said blocks being preferably made of a plastic material, and being interconnected, comprising the steps of: obtaining the predetermined shape for each nozzle duct (1) and providing it with a drive member (2); testing each nozzle duct for suitable operation and droplet emission; aligning each nozzle duct in a mount (12) and encapsulating it in a first plastic block (10); cutting the first plastic block (10) at its rear to be perpendicular to the ends of the nozzle ducts (1); and connecting it to the distribution duct (17) which is encapsulated in a second plastic block (15).