Optimized ink jet printing of barcodes

Details Optimized ink jet printing of barcodes Optimized ink jet printing of barcodes

2007-12-25

2007-12-25

Meier, Stepehen (Department: 2853)

Incremental printing of symbolic information

Ink jet

Medium and processing means

C347S040000, C347S041000, C347S042000, C347S043000

Reexamination Certificate

active

09949456

ABSTRACT:
Inkjet printing of barcodes is enhanced by several methods. In a printhead having two staggered columns of nozzles, using only the even (or odd) column enhances resolution of a vertical barcode element. Filling interior portions of the barcode element with the odd (or even) column improves barcode appearance. Barcode swelling, due to ink migration after application, is reduced by use of a depletion matrix to lessen the quantity of ink applied. Application of the depletion matrix to the edges of the barcode elements resists swelling where resolution is most required. Where a printing mask is applied to the edges of the barcode elements, the edges may be printed only by one column of printhead nozzles, or only during one direction of printhead movement, or both. Alternately, removal of one or more pixels along the edge of a barcode element allows each barcode element to swell to the desired size.

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