Patent ID: 8610020

Claim:
A method for sorting postal objects, comprising: treating sets of grouped postal objects for generating singulated postal objects each of which is physically separated from each other; and sorting the singulated postal objects by directing each postal object towards a respective selected outlet from among a number n of selectable outlets, performing a first sorting step, accumulating, within an i-th selected outlet, postal objects belonging to K subgroups having homogeneous delivery points; carrying out a step of re-processing of the previously sorted postal objects, whereby the postal objects withdrawn from the outlets are treated for forming lots of postal objects; each lot comprising the postal objects belonging to a respective homogeneous subgroup ordered according to successive delivery points; and performing a second step of sorting of the lots, which provides for sending of the postal objects having corresponding positions within each lot to a respective outlet; the objects are accumulated in the outlet according to successive delivery points and then sequenced, wherein the homogeneous delivery points of the subgroups are defined as: (L), nK+(L), 2nK+(L), 3nK+(L), . . . , (j−1)*nK+(L) wherein: n is the maximum number of the outlets that can be selected in the course of the first sorting step; j is an indicator of the maximum number of the outlets used in a second step; K is the magnification factor given by an integer greater than or equal to two; i is the numeral of the outlet; (L) is one of the consecutive values {k +(i−1)*K}, where k is the numeral of the subgroup and may assume one of the integer values between 1 and K.