Image printing method and system for improving image quality in dot matrix printer
View Patent ↗Ink coalescence in inkjet printing is reduced by printing mutually interstitial images using an arrangement of multiple curing stations in combination with multiple printing heads.
1. A method for reconstructing an image on a dot matrix printer having a print head assembly arranged to print a mutually interstitial sub-image during a print pass along a fast scan orientation, the method comprising:
separating the image into a primary series of M (M>1) mutually interstitial sub-images;
separating each one of the M mutually interstitial sub-images of the primary series into a secondary series of N (N>1) mutually interstitial sub-images to obtain N*M mutually interstitial sub-images of the secondary series;
printing the N*M mutually interstitial sub-images of the secondary series; and
performing at least a partial curing on the N*M mutually interstitial sub-images; wherein
the printing and the at least partial curing of at least two of the N*M mutually interstitial sub-images of the secondary series that are derived from a same one of the M mutually interstitial sub-images of the primary series occurs during a same print pass of the print head assembly.
2. The method according to claim 1 , wherein N=M=2.
3. The method according to claim 1 , wherein a first sub-image belonging to the N*M mutually interstitial sub-images of the secondary series is printed along a first direction along the fast scan orientation, and another N*M mutually interstitial sub-image belonging to the secondary series is printed along a second direction opposite to the first direction along the fast scan orientation.
4. The method according to claim 1 , further including a final curing step.
5. A dot matrix printing system for printing an image comprising:
an image separator arranged to separate the image into a primary series of M (M>1) mutually interstitial sub-images;
a second image separator arranged to separate each one of the M mutually interstitial sub-images of the primary series into a secondary series of N (N>1) mutually interstitial sub-images to obtain N*M mutually interstitial sub-images of the secondary series;
a print head assembly arranged to print the N*M mutually interstitial sub-images during a print pass;
a curing stations arranged to perform at least partial curing on the N*M mutually interstitial sub-images of the secondary series; and
a sequencer arranged to control the print pass of the print head assembly and power supplied to the curing station; wherein
the sequencer powers on the curing station during the print pass of the print head assembly to at least partially cure at least two of the N*M mutually interstitial sub-images of the secondary series that are derived from a same one of the M mutually interstitial sub-images of the primary series.
6. The system according to claim 5 , wherein the dot matrix printing system is an inkjet printer.
7. The system according to claim 5 , wherein the curing stations is a UV curing station.
8. A non-transitory computer readable medium comprising program code and computer code instructions adapted to carry out the method according to claim 1 , when the instructions are executed on a computer.