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US 2003/0118388 A1Published application
Colour proofer with registering means
AssigneesAgfa-Gevaert, Mutoh Europe
InventorsRudy Sampson, Stefaan Deman, Serge Defever, Marc Chys, Christophe Michiels, Jozef Feys, Patrick Staelens
Life of this patent
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Abstract
A printing apparatus is described for two-sided colour proofing with improved registering of front- and back-side images. Improved registering is performed by: web feeding device with de-curling system tumbler unit for turning the receiving medium alignment sensing and correction system
Claims10
A printing apparatus comprising:
- a print unit (1) having a print head (16) for printing an image on a receiving medium (10);
- medium supply means (2) for feeding said receiving medium (10) to said print unit (1) is characterised in that the printing apparatus further includes a medium alignment system (20, 37, 38) having:
- at least one alignment sensor (37, 38) for determining the alignment of said receiving medium (10) in said print unit (1);
- an alignment correction system for correcting said alignment.
1 more element
Method for printing images on a front and back side of a receiving medium (10) comprising the steps of:
- feeding the receiving medium (10) to a print unit (1) having a print head (16);
- printing a first image on said front-side using said print head (16);
- feeding the receiving medium (10) to a tumbler unit (3);
- tumbling said receiving medium (10) in said tumbler unit (3);
- re-feeding said receiving medium (10) to said print unit (1);
- sensing the alignment of said receiving medium (10) by at least one alignment sensor (37, 38);
- printing an second image on the back-side using said print head (16);
- is characterised in that the method further comprises the step of correcting said alignment of said receiver medium (10) prior to printing said image on said back-side.
5 more elements
Dependencies are inferred from the claim text.