A multiwell plate scanner comprises a detector for measuring an attribute of a sample which is scanned continuously over wells of a multiwell plate. The stacking assembly includes a support blade moveably mounted to a bin for accepting a stack of mailpieces and an ingestion assembly including a Leading Edge urge roller and Trailing Edge alignment device. The content directory on the volatile memory system is updated based, at least in part, upon the plurality of data requests. 5 \u03bcm and comprising, as a resin component, a polyester-base resin having a glass-transition temperature of not less than 40\xb0 C.