Method and apparatus for converting substrates bearing ink images on the substrate with a converting belt apparatus
A method and apparatus in which a converting belt system belt is coated with a composition suitable for use with ink image-bearing substrates that require ink drying, fusing, or both for the ink image-bearing substrates to improve various durability and other properties of the ink image-bearing substrates.
1 . A method for improving at least one property of an ink image printed on a substrate, the method comprising:
a) drying the ink image in a drying step to remove at least a major portion of the ink carrier; and
b) passing the substrate through a nip defined by a fuser roller and a pressure roller in a converter belt system.
2 . The method of claim 1 , wherein the ink image is an inkjet image.
3 . The method of claim 1 , wherein at least a quantity of ink carrier sufficient to prevent artifacts upon drying or fusing in a belt fusing system is removed in the drying step.
4 . The method of claim 1 , wherein at least 80 weight percent of the ink carrier initially present in the ink is removed in the drying step.
5 . The method of claim 1 , wherein at least 85 weight percent of the ink carrier initially present in the ink is removed in the drying step.
6 . The method of claim 1 , wherein at least 90 weight percent of the ink carrier initially present in the ink is removed in the drying step.
7 . The method of claim 1 , wherein a belt in the belt fusing system is coated with a composition comprising a silsesquioxane or a cross-linked poly(dialkylsiloxane) containing an oxide filler.
8 . The method of claim 1 , wherein the substrate comprises a nascent protective layer.
9 . The method of claim 1 , wherein the ink contains fusible components.
10 . The method of claim 1 , wherein the fuser and pressure roller are at a temperature below a fusing temperature.
11 . The method of claim 1 , wherein the fuser and pressure roller are at a temperature sufficient to fuse a nascent protective layer or a fusible ink.
12 . The method of claim 1 , wherein the printed ink image is dried in the drying step with a heated air stream.
13 . The method of claim 1 , wherein the substrate bearing an ink image is passed through the nip at a rate of about 0.5 to about 15 cm/sec.
14 . The method of claim 1 , wherein the ink image is an inkjet ink image.
15 . The method of claim 1 , wherein the ink image is a printed inkjet ink image.
16 . The method of claim 1 , wherein the ink image comprises an image containing a plurality of different color inks.
17 . The method of claim 16 , wherein at least a portion of the inks contain fusible constituents.
18 . The method of claim 1 , wherein the substrate is cooled after passing through the nip.
19 . The method of claim 1 , wherein the durability of the ink image is improved.
20 . An apparatus for improving at least one property of an ink image printed on a substrate, the apparatus comprising:
a) a drier adapted to remove at least a major portion of a carrier from the ink image;
b) a converting belt system for further drying or fusing the ink image; and
c) a conveyor system operable to transport the substrate through the drier and the converter belt system for further drying or fusing.
21 . The apparatus of claim 20 , wherein the drier is adapted to remove from about 50 to about 95 weight percent of the carrier from the ink image.
22 . The apparatus of claim 20 , wherein the converter belt system for further drying or fusing comprises a belt positioned around a first and a second roller with the first roller comprising a fuser roller and the second roller comprising a pressure roller positioned to form a nip with the fusing roller.
23 . The apparatus of claim 22 , wherein the apparatus includes a cooler adapted to cool the substrate after the substrate has passed through the nip.