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

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.