Rotatable drum inkjet printing apparatus for radiation...

Details Rotatable drum inkjet printing apparatus for radiation... Rotatable drum inkjet printing apparatus for radiation...

B - Operations, Transporting

41

J

B41J 2/17 (2006.01) B41J 11/00 (2006.01)

Patent

CA 2431867

Inkjet printing apparatus (10) includes a drum, a print head (20) for directing radiation curable ink toward a substrate (18) on the drum, and a curing device (22) for directing radiation toward the ink that is received on the substrate. The curing device is selectively operable to direct radiation toward a certain portion of the ink received on the substrate only after that certain portion has moved with the substrate and the drum through an arc that is at least 360 degrees. In this manner, the ink on the substrate has sufficient time to spread and level and the resultant image is of high quality.

L'invention concerne un dispositif d'impression à jet d'encre (10) comprenant un tambour, une tête d'impression (20) destinée à diriger une encre durcissable par rayonnement vers un substrat (18) sur ce tambour, ainsi qu'un dispositif de durcissement (22) servant à diriger le rayonnement vers l'encre reçue sur ce substrat. Ce dispositif de durcissement fonctionne de manière sélective de manière à diriger le rayonnement vers une certaine partie de l'encre reçue sur le substrat uniquement après le déplacement de cette partie avec le substrat et le tambour sur un arc d'au moins 360 degrés. Ainsi, l'encre sur le substrat a suffisamment de temps pour s'étaler et se répartir, d'où l'obtention d'une image de haute qualité.

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