Recording device and curl determination method

Patent metadata

Field	Value
Publication number	US-9789703-B2
Application number	US-201514918810-A
Country	US
Kind code	B2
Filing date	Oct 21, 2015
Priority date	Oct 31, 2014
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

There is provided a recording device including a transport section that transports paper along a support surface; a recording section; a determination region setting section; a liquid volume ratio calculation section; a determination section; and a recording position adjustment section that, when the determination section determines that the average value is larger than the threshold, adjusts a distance of the recording section from the support surface to a distance which is longer than a case in which the average value is not larger than the threshold.

First claim

What is claimed is:

1. A curl determination method comprising:
dividing a recording region of a medium, which includes four side edges, into a plurality of regions, and setting, as a determination region, a continuous region in which at least two of the plurality of regions are continued and which includes an end part region which is the closest region to a corner section, in which two side edges are connected, of the medium, the determination region being less than an entirety of the plurality of regions;
calculating an average value of liquid volume ratios only for the determination region, the calculating of the average value including calculating the average value of the liquid volume ratios of the at least two of the plurality of the regions, which have been set as the determination region, each of the liquid volume ratios of the at least two of the plurality of the regions being a ratio of the liquid, which is discharged from a recording section to each of the at least two of the plurality of the regions set as the determination region based on the discharge data of the liquid which is discharged from a recording section to the medium, to a maximum liquid volume of the liquid which is configured to be discharged from the recording section; and
determining whether or not the average value of the liquid volume ratios, which are calculated only for the determination region, is larger than a predetermined threshold, and determining that curls are generated in the medium when determining that the average value is larger than the threshold.

2. The curl determination method according to claim 1 ,
wherein the dividing and setting includes setting the plurality of determination regions in the recording region of the medium, and
wherein the determining includes determining whether or not the largest average value of the average values of the liquid volume ratios of the liquid, which is discharged to the plurality of determination regions, is larger than the threshold.

3. The curl determination method according to claim 2 ,
wherein the determination region is a region which is positioned in a fixed distance from the side edges in the recording region.

4. The curl determination method according to claim 3 ,
wherein the driving and setting includes setting the determination region such that the determination region reaches over a center of the one side edge from the corner section side along at least one of the side edges.

5. The curl determination method according to claim 4 ,
wherein the average value is a weighted average, and the weight is large as the region is close to the corner section.

6. The curl determination method according to claim 5 , further comprising:
detecting temperature and humidity of the medium acquired before the recording is performed,
wherein the determining includes performing determination using the threshold which is predetermined according to the detected temperature and humidity of the medium.

Assignees

• Seiko Epson Corp

Inventors

• Kodama Hidetoshi

Classifications

• B41J25/3086

  with print gap adjustment means between the print head and its carriage · CPC title

• B41J13/0036

  in the output section of automatic paper handling systems · CPC title

• B41J11/0005 Primary

  Curl smoothing, i.e. smoothing down corrugated printing material, e.g. by pressing means acting on wrinkled printing material · CPC title

• B41J2/17566

  Ink level or ink residue control · CPC title

• B41J25/3082

  with print gap adjustment means on the print head carriage, e.g. for rotation around a guide bar or using a rotatable eccentric bearing · CPC title