Rotating printhead maintenance facility with symmetrical chassis

1. A maintenance facility for an inkjet printer having a pagewidth printhead and a media path for feeding sheets of media substrate in a media feed direction, the pagewidth printhead having an elongate array of nozzles extending the printing width of the media substrate, the maintenance facility comprising:

an elongate tubular chassis for mounting in the printer such that it can rotate about its longitudinal axis, said chassis having a plurality of sockets defined in an exterior surface thereof for receiving any one of the plurality of maintenance stations, said chassis having a central axial core housing a porous material; and,

a plurality of maintenance stations mounted to the corresponding plurality of sockets defined in the elongate chassis;

wherein:

the elongate chassis is symmetrical about at least one plane extending through and parallel with the longitudinal axis;

at least one of the maintenance stations is a wiper member for wiping the elongate array of nozzles; and

each of the sockets has at least one waste ink capillary for establishing fluid communication between the porous material in the central core and the maintenance station mounted to the socket.

2. A maintenance facility for an inkjet printer according to claim 1 wherein the elongate chassis is symmetrical about at least two planes extending through the longitudinal axis.

3. A maintenance facility for an inkjet printer according to claim 2 wherein the elongate chassis is mounted in the printer such that its longitudinal axis is transverse to the media feed direction.

4. A maintenance facility for an inkjet printer according to claim 1 wherein the elongate chassis is formed from an injection moulded polymer.

5. A maintenance facility for an inkjet printer according to claim 1 wherein the elongate chassis and the wiper member extend the length of the elongate array of nozzles.

6. A maintenance facility for an inkjet printer according to claim 1 wherein the mounting sites on the chassis engage corresponding formations on the maintenance station, the mounting site and the corresponding formations configured to slide into engagement.

7. A maintenance facility for an inkjet printer according to claim 6 wherein the maintenance stations can mount to any of the mounting sites on the tubular chassis.

8. A maintenance facility for an inkjet printer according to claim 1 wherein the wiper member is mounted to the tubular chassis such that it wipes the elongate array of nozzles in a direction parallel to the media feed direction.