1. A print engine assembly mountable to an inkjet printer, the print engine assembly comprising:
a housing arranged to be mountable to a printer;
a printhead assembly mounted to the housing, the printhead assembly incorporating a printhead having a plurality of print nozzles for selectively ejecting drops of ink towards a print medium passing said nozzles, the printhead further having a structure that defines a space adjacent said nozzles; and
a capping mechanism mounted to the housing for capping the nozzles of the printhead,
wherein, when the printhead is in a printing mode, said structure allows drops of ink ejected from the nozzles to strike the print medium while preventing contact between the nozzles and foreign bodies larger than a threshold size, and
wherein, when the printhead is in a non-printing mode, the capping mechanism is engageable with said structure to provide a closed atmosphere in the space.
2. An assembly according to claim 1 wherein said structure includes a nozzle guard, the space being defined between the nozzle guard and said nozzles.
3. An assembly according to claim 2 wherein said nozzle guard has a plurality of apertures aligned with said nozzles so that ink drops ejected from said nozzles pass through said apertures.
4. An assembly according to claim 1 further comprising air supply means mounted to the housing for providing positive air pressure to said space when the printhead is in the printing mode and discontinuing said air supply when the printhead is in the non-printing mode.
5. An assembly according to claim 3 wherein said plurality of nozzles are arranged in an array extending across an A4 pagewidth.
6. An assembly according to claim 5 wherein said nozzles comprise micro-electromechanical devices.
7. An assembly according to claim 6 wherein said nozzles are arranged in a plurality of print modules.
8. An assembly according to claim 7 wherein each print module is associated with a respective nozzle guard to define a respective space.
9. An assembly according to claim 8 wherein said air supply means supplies positive air pressure to each said space.
10. An assembly according to claim 3 wherein said capping mechanism covers said nozzle guard to seal the space from atmosphere.
11. An assembly according to claim 10 wherein said capping mechanism further includes means for discontinuing an air supply to said printhead.
12. An assembly according to claim 10 wherein said capping mechanism is located on a platen member mounted in the housing, said capping mechanism being moved into a capping position by the platen member when said printhead is in the non-printing mode.
13. An assembly according to claim 12 wherein said platen member is rotatable to bring said capping mechanism into said capping position.
14. An assembly according to claim 13 wherein said printhead extends across an A4 pagewidth, and wherein said platen member and said capping mechanism also extend across said pagewidth.
15. An assembly according to claim 14 wherein said capping mechanism includes a seal member arranged to contact said printhead in a locus surrounding said nozzle guard apertures.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1-5. (canceled)
6. A method for servicing a field device of automation technology with radio communication for a radio network, in which a number of field devices communicate via radio with a superordinated control unit, comprising the steps of:
the field device to be serviced switches, or is switched, at start-up, respectively, first start-up, into a special start-up mode;
in the special start-up mode, a peer to peer connection to a service device or to a selected field device is produced on a specific channel; and
integration data are transmitted from the service device or the selected field device to the field device to be integrated andor diagnostic data are transmitted from the field device to the service device or to the selected field device.
7. The method as claimed in claim 6, wherein:
in the special start-up mode on a specific channel, a peer to peer connection to a service device or to a selected field device is produced, as soon as voltage is applied to the field device.
8. The method as claimed in claim 6, wherein:
for the case, in which the field device to be integrated is a wireless HART field device, a fixed IEEE 802.15.4 channel is started, which waits for transmission of an activating packet from the service device, or from the selected field device.
9. The method as claimed in claim 6, wherein:
a configuration andor diagnosis of the field device is performed, even though the field device is still not integrated into the radio network.
10. The method as claimed in claim 6, wherein:
as field device a conventional field device is used, which is converted into a radio field device by providing it with a radio, or wireless, adapter.