Print engine assembly with rotatable platen defining cavity for holding blotting material

1. A print engine assembly comprising:

an elongate chassis;

a pair of bearing moldings operatively mounted to either end of the chassis;

a rotatable platen supported by a rotary shaft extending between and mounted in the pair of bearing moldings;

a printhead assembly mounted to the chassis, the printhead assembly including an elongated pagewidth printhead having a plurality of ink printing integrated circuits; and

a feed mechanism mounted to the bearing moldings, the feed mechanism configured to feed print media beneath the printhead during printing, wherein

the rotatable platen includes an extruded material shaped to define a cavity in which a blotting material is disposed, and the rotatable platen defines an aperture extending along a length thereof through which aperture the blotting material is exposed.

2. A print engine assembly as claimed in claim 1 , further comprising two pairs of rails arranged on the chassis, to which rails each bearing molding is respectively movably mounted.

3. The print engine assembly as claimed in claim 2 , wherein the extruded material of the rotatable platen is further shaped to have a first flat surface extending longitudinally along a length thereof, the first flat surface serving as a support surface for print media.

4. The print engine assembly as claimed in claim 3 , wherein the rotatable platen further includes a second flat surface extending longitudinally along a length thereof, and a capping member attached to the second flat surface.

5. The print engine assembly as claimed in claim 4 , wherein the first flat surface, the second flat surface, and the aperture are generally concentric with a longitudinal axis of the rotary shaft, and the first flat surface, the second flat surface, and the aperture are separated from each other by an angle of 120°.