Techniques are disclosed for dispatching pixel information in a graphics processing pipeline. The packing machine is distinguished in that a cleaning device is provided for the mold andor the sealing tool. Workstations are also provided including a flow cell device and one or more station for processing a substrate, such as one or more of a printer, reaction chamber, wash chamber, and scanner. The request includes a category identifier that is utilized to identify the first plurality of items. Steps and may be repeated until convergence is reached.