Ink jet recording apparatus, ink-jet recording method and ink jet recording medium

1. An ink jet recording apparatus comprising:

a roll-set curl correcting section to correct a roll-set curl of a roll-state recording medium by applying heat and pressure, wherein the roll-set curl correcting section comprises a heating roller and a pressing roller installed to face the heating roller so as to nip the recording medium;

a recording head to jet ink onto the recording medium; and

a transporting section to transport an unrolled recording medium as the roll-set recording medium from a roll of rolled-recording medium wound around a core to the recording head via the roll-set curl correcting section so that the roll-set curl correcting section corrects the roll-set curl of the roll-set recording medium and thereafter the recording head jets ink onto the curl-corrected recording medium,

wherein the pressing roller is a rubber roller and the heating roller is a metallic roller, and the hardness of the metallic roller is not less than 2 times the hardness of the rubber roller, and

wherein the transporting section transports the recording medium such that the convex side of the roll-set curl of the recording medium faces the heating roller.

2. The ink jet recording apparatus of claim 1 , wherein the ink jet recording apparatus further comprises:

an inputting section to input information of the thickness and the type of the recording medium; and

a controlling section to control a heating temperature of the heating roller in accordance with the information.

3. The ink jet recording apparatus of claim 1 , wherein the ink jet recording apparatus further comprises:

a detecting section to detect a degree of roll-set curl of the recording medium; and

a controlling section to control a heating temperature of the heating roller in accordance with the degree of roll-set curl of the recording medium.

4. The ink jet recording apparatus of claim 1 , wherein the ink jet recording apparatus further comprises:

a detecting section to detect a residual roll quantity of the roll-state recording medium; and

a controlling section to control a heating temperature of the heating roller in accordance with the residual roll quantity.

5. The ink jet recording apparatus of claim 1 , wherein the ink jet recording apparatus further comprises:

an inputting section to input information of the thickness and the type of the recording medium; and

a controlling section to control a pressure of the pressing device in accordance with the information.

6. The ink jet recording apparatus of claim 1 , wherein the ink jet recording apparatus further comprises:

a detecting section to detect a degree of roll-set curl of the recording medium; and

a controlling section to control a pressure of the pressing roller in accordance with the degree of roll-set curl of the recording medium.

7. The ink jet recording apparatus of claim 1 , wherein the ink jet recording apparatus further comprises:

a detecting section to detect a residual roll quantity of the roll-state recording medium; and

a controlling section to control a pressure of the pressing roller in accordance with the residual roll quantity.

8. The ink jet recording apparatus of claim 1 , wherein the ink jet recording apparatus further comprises:

a guide to keep the recording medium in a flat state, the guide installed at a downstream position of the roll-set curl correcting section with respect to the transporting direction of the recording medium.

9. The ink jet recording apparatus of claim 1 ,

wherein the recording medium has an image forming side on which the recording head jet ink so as to form an image, and wherein the transporting section and the roll-set curl correcting section are arranged such that the heating roller faces the image forming side of the recording medium.

10. The ink jet recording apparatus of claim 1 , further comprising:

a holding section provided between the roll-set curl correcting section and the recording head so as to hold the corrected recording medium.