Patent ID: 7201372

Claim:
A method for forming a stack of under-accumulated sheets in an under-accumulation process for mail processing, comprising: (a) advancing an unassembled set of sheets to be assembled in a single stack in a predetermined sequence; (b) receiving program job information for the unassembled set of sheets during advancement of the unassembled set of sheets and prior to advancement of the unassembled set of sheets to a first set of sheets to a first under-accumulator; (c) determining whether the unassembled set of sheets can be under-accumulated in a first under-accumulator based upon the program job information and information regarding a capacity of the first under-accumulator; (d) under-accumulating a portion of the advanced sheets in a first stack in the first under-accumulator to a level determined based upon the program job information; (e) under-accumulating a remaining portion of the advanced sheets in a second stack in a second under-accumulator wherein a last sheet in the predetermined sequence is under-accumulated last in the second stack; and (f) stacking the first stack of sheets on the second stack of sheets to assemble the single stack of sheets wherein the last sheet is on a bottom of the single stack.