Inkjet recording apparatus

  • US 8,967,796 B2
  • Filed: 01/31/2014
  • Issued: 03/03/2015
  • Est. Priority Date: 11/28/2011
  • Status: Active Grant
First Claim
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1. An inkjet recording apparatus, comprising:

  • a first conveyor configured to selectively nip and convey a first sheet and a second sheet in a conveying direction, the second sheet having a shorter length in a first direction than the first sheet, the first direction being perpendicular to the conveying direction and a vertical direction;

    a recording head comprising nozzles configured to eject ink droplets onto a sheet conveyed by the first conveyor;

    a corrugate mechanism disposed upstream of the nozzles in the conveying direction and configured to form the sheet into a corrugated shape having alternating ridge portions and groove portions arranged in the first direction;

    a plurality of second conveyors disposed downstream of the nozzles in the conveying direction and spaced from each other in the first direction, each of the plurality of second conveyors being spaced, in the conveying direction, from a corresponding first portion of the corrugate mechanism, the corresponding first portion configured to form one of the ridge portions in the sheet, the plurality of second conveyors being configured to nip the sheet at nip points and convey the sheet; and

    a plurality of first pressing portions disposed downstream of the nozzles in the conveying direction and spaced from each other in the first direction, each of the plurality of first pressing portions being spaced, in the conveying direction, from a corresponding second portion of the corrugate mechanism, the corresponding second portion configured to form one of the groove portions in the sheet, the plurality of first pressing portions being configured to contact, at lower ends thererof, an upper surface of the sheet, and the lower ends being positioned lower than the nip points of the plurality of second conveyors,wherein the inkjet recording apparatus defines a first zone configured to receive passage of the first sheet but not passage of the second sheet, and a second zone configured to receive passage of the first sheet and the second sheet, andwherein the plurality of first pressing portions comprise first pressing portions positioned in the first zone and first pressing portions positioned in the second zone, and a pressing force per unit area configured to be applied to the sheet by the first pressing portions positioned in the second zone is less than a pressing force per unit area configured to be applied to the sheet by the first pressing portions positioned in the first zone.

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