Method for controlling pressure nozzles of a full-line...

Details Method for controlling pressure nozzles of a full-line... Method for controlling pressure nozzles of a full-line...

2005-03-15

2005-03-15

Meier, Stephen D. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

C358S488000

Reexamination Certificate

active

06866357

ABSTRACT:
The invention concerns a method for controlling print nozzles of a full-line printing head in an inkjet printer for printing digital photographic images, in which, in order to prevent any image printing extending beyond the edge of a recording medium, the edge position of the recording medium that is moved relative to the printing head is sensed by way of a CCD line sensor, and ink droplets are discharged toward a recording medium, by way of the printing nozzles, in order to produce image pixels. The method is characterized by the following steps: storage of the edge position of the recording medium, scanned for each CCD line, as digital data in a memory of an electronic control system; generation of a digital printing mask by determining, for each CCD line, the image pixel difference between the digital data of the recording medium representing the edge position, and the digital image data, stored for each CCD line, that are provided for printing out onto the recording medium; and creating a control signal, for each CCD line, corresponding to the printing mask, in order to deactivate the printing nozzles that discharge ink droplets beyond the edges of the recording medium.

REFERENCES:
patent: 5812162 (1998-09-01), Silverbrook
patent: 5847674 (1998-12-01), Paroff et al.
patent: 5912448 (1999-06-01), Sevier et al.
patent: 6027203 (2000-02-01), Campbell
patent: 6109745 (2000-08-01), Wen
patent: 0 570 167 (1993-11-01), None
patent: WO 9638370 (1996-12-01), None
patent: WO 9728003 (1997-08-01), None

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