Process and printer with substrate advance control
US6398334B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 2000 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Nov 30, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J29/393
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Process for compensation of a defect in the advance of a print substrate by modifying the arrival position of ink droplets with a variable electrical charge on the substrate (27), these droplets being charged in a variable and sequential manner, the paths of the droplets being affected by deviation electrodes (23, 24) deviating the droplets to one of N positions defined by their row j (1≦j≦N), the N positions defining a frame obtained by a burst of droplets in the form of a straight line segment parallel to an X direction along which the substrate advances. The process is characterized in that:a current band is printed with a first mark on the substrate,the substrate is advanced to print the next band,an algebraic difference is determined between a nominal theoretical position of the mark and the real position of the mark,a correction to the value of the charge voltage to be applied to each droplet to compensate for the position error of the substrate is determined for each droplet in the burst,the substrate correction calculated for the droplet in the said row is applied to each droplet in the next band, in addition to the nominal voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.