Abstract: A method for manufacturing a printing bar unit for a printing system includes the steps of providing a support bar having a plurality of primary mounting positions, providing a plurality of exchangeable printheads having a plurality of inkjet nozzles, and releasably mounting the printheads to the support bar. Preceding the step of releasably mounting the printheads to the support bar, a plurality of reference organs are connected at the primary mounting positions to the support bar and undergo an alignment finishing process for forming a plurality of accurate secondary mounting positions, and then in a subsequent step the printheads are releasably mounted to the secondary mounting positions on the reference organs. A dimensional tolerance of the secondary mounting positions on the reference organs relative to each other is more accurate than a dimensional tolerance of the primary mounting positions on the support bar relative to each other.

Abstract: A method for manufacturing a printing bar unit for a printing system includes the steps of providing a support bar having a plurality of primary mounting positions, providing a plurality of exchangeable printheads having a plurality of inkjet nozzles, and releasably mounting the printheads to the support bar. Preceding the step of releasably mounting the printheads to the support bar, a plurality of reference organs are connected at the primary mounting positions to the support bar and undergo an alignment finishing process for forming a plurality of accurate secondary mounting positions, and then in a subsequent step the printheads are releasably mounted to the secondary mounting positions on the reference organs. A dimensional tolerance of the secondary mounting positions on the reference organs relative to each other is more accurate than a dimensional tolerance of the primary mounting positions on the support bar relative to each other.

Abstract: Drop-on-demand inkjet printing device (10) comprising a through-flow print head (20) having nozzles (22) and a fluid circulation system comprising a main reservoir (30), a supply buffer tank (38), a return manifold (64), wherein the main reservoir (30) is connected to the supply buffer tank (38) wherein the supply buffer tank (38) is in fluid communication with the nozzles (22) print head (20) the nozzles (22) being in fluid communication with the return manifold (38) wherein the return manifold (64) is connected to the main reservoir (30) and both are arranged in height with respect to the nozzles (22), wherein the supply buffer tank (38) is provided with a lockable conduit (56) connecting the supply buffer tank (38) to the main reservoir (30).

Abstract: Drop-on-demand inkjet printing device (10) comprising a through-flow print head (20) having nozzles (22) and a fluid circulation system comprising a main reservoir (30), a supply buffer tank (38), a return manifold (64), wherein the main reservoir (30) is connected to the supply buffer tank (38) wherein the supply buffer tank (38) is in fluid communication with the nozzles (22) print head (20) the nozzles (22) being in fluid communication with the return manifold (38) wherein the return manifold (64) is connected to the main reservoir (30) and both are arranged in height with respect to the nozzles (22), wherein the supply buffer tank (38) is provided with a lockable conduit (56) connecting the supply buffer tank (38) to the main reservoir (30).