JP2003170579A5 - - Google Patents

Description

In the case of transporting a continuous recording paper having a paper transporting deep hollow at high speed, control the application amount of the liquid such that the relative humidity of the paper transporting deep hollow near immediately after the liquid coating is below 80% R H It is good to do. Sheet conveying speed varies depending on the kind of paper, preferably, the relative humidity of the paper transporting deep hollow near immediately after the liquid coating has good is below 65% R H. When conveying a continuous recording sheet having a sheet conveyance perforation at high speed, when the recording sheet is brought into a high humidity environment, the swelling of the cellulose fiber, etc. causes deformation of the diameter of the perforation and unevenness, resulting in sheet conveyance speed. It is because fluctuation is easy to occur.

For example, the paper feed speed for line type recording or the head moving speed (serial speed) V for serial type is indicated by V = f / R by the ink droplet discharge frequency f and the recording resolution R. The present invention is in the high speed recording on at least 10ips than effectively available. In particular, in the case of a line type ink jet apparatus for high speed printing of continuous paper, in a line type in which a print head for jetting ink droplets is fixed during printing, the number of printing interruptions such as preliminary ejection reducing the substantial printing speed is reduced. It is very effective because it can do things.

The relative humidity of the paper transporting deep hollow near immediately after the liquid coating is to control the coating amount of the liquid so as to be below 80% R H. When conveying a continuous recording sheet having a sheet conveyance perforation at high speed, when the recording sheet is brought into a high humidity environment, the swelling of the cellulose fiber, etc. causes deformation of the diameter of the perforation and unevenness, resulting in sheet conveyance speed. It is because fluctuation is easy to occur.

Claims (8)

  What is claimed is: 1. An inkjet recording apparatus for forming recording dots by ejecting ink droplets onto a recording sheet, comprising means for applying a liquid to a specific portion of the recording sheet.   2. The ink jet recording apparatus according to claim 1, wherein the specific portion of the recording sheet is a non-image portion and includes at least one of a cutting portion of the sheet, a processing portion including perforations and perforations.   3. The ink jet recording apparatus according to claim 2, wherein the recording paper passes the means for applying the liquid prior to the ink jet recording means for ejecting ink droplets to form recording dots.   4. The ink jet recording apparatus according to claim 2, wherein the liquid to be applied contains at least one of water and an organic solvent.   5. An ink jet recording apparatus according to claim 4, wherein printing is performed at a recording speed at which the relative speed between the nozzle and the recording sheet is 10 inches per second (ips) or more.   6. An ink jet recording apparatus according to claim 5, wherein the print head for ejecting ink droplets is a line type which is fixed during printing.   6. The ink jet recording apparatus according to claim 5, wherein printing is performed on a continuous recording sheet having a hole for sheet conveyance. An ink jet recording apparatus according to claim 7, wherein the controlling the application amount of the liquid such that the relative humidity of the paper transporting deep hollow near immediately after the liquid coating is below 80% R H.