Group 6
Operation – Functional principle
Page 45
Release 3.00
Leibinger-Jet 2 se
The drops can now be charged up by creation of voltage between jet and charging
electrode, because they are given a negative charge through the charge shift resulting in
the charge electrode gap. A specific charge voltage is clearly allocated for each drop
charge.
6.2.4 Drop deflection
After the drops have left the charging electrode they fly through an electrical field. Here,
those droplets that were previously charged in the charging electrode are deflected. The
drops that have not been charged fly straight ahead into the gutter. Here they are sucked
up and fed back to the circular flow of ink. The charged drops are only deflected in one
direction, the other direction is performed by the product to be inscribed.
6.2.5 Creation of a character
Each character is defined by a two-dimensional matrix, e.g. 7 x 5. An ink drop can be
assigned to every point of intersection. The character is formed by deflecting the ink
drops in a vertical direction and by moving the product which is to be imprinted
horizontally. The ink drops which are not to be positioned are not given electrostatic
charges in the charging electrode, and pass through the electrical field without being
deflected and on into the gutter tube. The values needed for generating the charge
voltages for each individual character are stored in memory devices (FPROMS) on the
controller board.
