Abstract: A conveyor apparatus including a main conveyor by which mail items are routed by being nipped between a transport belt and a main belt, and a secondary conveyor towards which the mail items are routed, after switching, along a secondary belt. The main and secondary belts performing the main conveying and the secondary conveying functions are constituted by a single, common belt that is twisted twice. The twice-twisted belt is engaged over a tensioner pulley that is a floating pulley.

Abstract: A method of sorting postal items in a plurality of sorting passes in a sorting machine having sort outlets with removable trays, the method including the steps of: (i) after a first sorting pass during which the sorted items are stored in the trays, determining and storing in a memory the pass sequence in which the items are to pass through the sorting machine for the subsequent sorting pass; and (ii) during said subsequent sorting pass, while a current item to be directed towards a sort-outlet tray is passing, determining in the pass sequence the difference in rank between the current item and a next item immediately following the current item and that is to be directed to the same sort-outlet tray as the current item, and comparing the difference with a threshold for causing the sort-outlet tray to be replaced with an empty tray.

Abstract: In the method of handling mail items, while a mail item is on its first pass through the machine, the method consists in forming a digital image of the surface of the mail item, in deriving, from the image, a digital fingerprint characterizing the mail item, and in recording said digital fingerprint in a memory in correspondence with the bar code printed on the mail item. While the mail item is on its second pass through the machine, the method consists in reading the printed bar code that is printed on the mail item, and, if it has not been possible to extract completely the information contained in the printed code read off the mail item, in using said correspondence in the memory between the printed code that is printed on the mail item and the digital fingerprint that characterizes the mail item to continue machine-sorting the mail item, thereby contributing to reducing the error rate.

Abstract: In a method for sorting postal objects in a sorting machine comprising sorting outlets with movable trays for the storage of the postal objects, respective logical destinations (DL) are associated to the sorting outlets and some sorting outlets of the machine are reserved, called reserved sorting outlets, without logical destination association. In case of the detection of a tray overflowing in a sorting outlet (DP?), the postal objects intended to this overflowing sorting outlet are directed to a reserved sorting outlet (DP?) extracted (40) from a logical waiting list (36) of reserved sorting outlets, an index is associated (32) to the empty tray of the reserved sorting outlet, the overflowing sorting outlet is inserted (42) into said waiting list and an empty tray is loaded (46) in the overflowing sorting outlet in the place of the full tray.

Abstract: The read head (1) for a postal sorting installation serves to pick up a digital image of each postal object using a high-resolution camera (3) providing a multiple level gray scale. The read head also has a low-resolution color camera (4), the two cameras (3, 4) being placed in such a manner as to acquire simultaneously two superposable digital images of each postal object. The superposable high-resolution gray scale image and low-resolution color image are intended to be combined in order to provide a high-resolution color image.

Abstract: A method of processing postal articles in which a physical magnitude is measured in order to detect (2) whether the outside surface of a postal article is made of a plastics material, and in which a digital image of said outside surface of the postal article is processed in order to detect (3) whether said surface has a noisy background. On the basis of the results of these two detection operations, it is determined (4) whether the outside surface of said postal article is a printable surface or a non-printable surface.

Abstract: The method of sorting postal items in a plurality of sorting passes using at least one sorting machine having sorting outlets constituted by bins consists in using digital fingerprints (V_ID) identifying the items in a data processor system for automatic address recognition by OCR and/or by video coding. During the first sorting pass, the digital fingerprints of the items are recorded in association with the identification numbers (Bin_ID) of the bins. During the second sorting pass, these digital fingerprints and bin identification numbers are recovered in order to constitute a database (DB) which is updated by counting (46, 47, 48) the fingerprint matches obtained for each loaded bin and by counting consecutive accesses to the database that occur without obtaining a fingerprint match.

Abstract: The method of processing images (IN) including address information by video coding consists in identifying, for each image rejected by a process for automatically evaluating addresses by OCR, a rejection category corresponding to the rejected image by means of a cascade of filters (F1–F4) applied to confidence ratings in the image attribute vector associated with the rejected image, and when the rejection category corresponding to the rejected image is identified at a filter, in causing said filtering to be followed firstly by operator encoding (VC1–VC4) specific to the rejection category so as to add to or modify the image attribute vector associated with the rejected image, and secondly by evaluating (E) the image attribute vector associated with the rejected image so as to be able to decide when to stop video coding for the rejected image.

Abstract: The device for dynamically weighing postal items (P) comprises a plate (1) floatingly mounted on a weight sensor, and a conveyor belt mounted on the plate to move the postal items in a longitudinal direction (D) of the conveyor. The conveyor has two parallel conveyor belts (2C, 3C) which extend along the conveyor direction between a conveyor inlet (E) and a conveyor outlet (S), and between which the postal items are pinched and moved in series on edge. The two conveyors belts are engaged on a pair of first elastically deformable finned wheels (2A, 3A) disposed at the inlet (E) of the conveyor and being aligned perpendicularly to the longitudinal direction, and on a pair of second elastically deformable finned wheels (2B, 3B) disposed at the outlet (S) of the conveyor and being aligned perpendicularly to the longitudinal direction, and the operation of the weight sensor is based on the electromagnetic principle of flux compensation.

Abstract: A postal sorting machine includes an injection carousel (1) and a system (4) for injecting mail items (3) standing on edge into receptacles (2) of the carousel (1). Each receptacle (2) of the carousel (1) is defined by an end wall (7) and two side walls (5, 6). A flexible deflector (12) is secured to a first side wall (5) of each receptacle in such a manner that each mail item (3) injected into the receptacle (2) is guided towards the end wall (7) while being pressed substantially against the second side wall (6).

Abstract: The method of detecting overlapping postal items in a postal sorting installation (1) consists in detecting variation in the length of each item by causing each item to go past a plurality of proximity detectors (4, 5, 6, 7). The proximity detectors are situated at different points of the sorting installation (1) and they are configured to evaluate the length of each item. As they pass through the sorting installation, overlapping items shift progressively relative to one another due, in particular, to friction. Thus, the total length of a set of overlapping items tends to vary, such that evaluating variation in the length of each potential item serves to provide information that is reliable for detecting overlaps. Since it is relatively easy to evaluate the length of an item, the performance of the installation is improved at low cost.

Abstract: A postal sorting machine comprises an injection carousel (1) and a system (4) for injecting mail items (3) standing on edge into receptacles (2) of the carousel (1). Each receptacle (2) of the carousel (1) is defined by an end wall (7) and two side walls (5, 6). A blower (13) is interposed between the injection system (4) and the carousel (1). The blower (13) delivers two jets (14, 15) of compressed air that are substantially perpendicular to each other, with each mail item (3) being displaced between the jets.

Abstract: In order to be able to prepare a postman's walk containing both letters (L) and “large format” flat postal objects (P) in a single pass: the letters and the large format objects are moved in series using a conveyor (3) over the bins of a bin carrousel (4) that is stationary, with the successive bins of the carrousel corresponding to different successive delivery points in the postman's walk; each letter or large format object on the conveyor is directed towards that one of the bins of the carrousel which corresponds to the delivery point for the letter or large format object; and when all of the letters and large format objects of the postman's walk have been grouped together by delivery points in the bins of carrousel, the bin carrousel is set into motion in order to bring each bin in succession to a location (5) where the bin is emptied into a receptacle.

Abstract: The method of handling mail items (1) in a mail handling machine (2) comprises steps consisting in delaying printing of an identity code (19) on a mail item until address information is determined by deriving a digital imprint (9, 13) characterizing the mail item from the image (4) of the mail item, thereby making it possible to avoid printing an identity code on mail items that have foreign destinations. An extended identity code is printed on all of the mail items that do not have foreign destinations.

Abstract: A method of using reflection of a laser ray (LZ) for measuring the thickness (e) of a flat mail item (1) consists in nipping the mail item by means of an elastically deformable member (3) that has a first surface (4a) in contact with one face of said mail item, and a reflective second surface (4b) substantially parallel to said first surface, and in directing the laser ray onto said reflective second surface (4b) for the purpose of measuring the thickness of the mail item.

Abstract: In order to segment a digital image of a postal packet in order to read a postal address (AP) automatically on said packet, the method consists: in subdividing (20) the image into image blocks of identical size; in applying (30) processing based on a Hough transform to each image block in order to identify in the image block in question a privileged direction for the distribution of image points in the block under consideration; in grouping together (40) contiguous image blocks within the image having a common privileged direction in order to define (50) a rectangular zone of interest (ZI) containing the group of said contiguous blocks having a common privileged direction in such a manner that said rectangular zone of interest has a longitudinal edge parallel to said common privileged direction; and in applying the automatic address-recognition algorithm to said zone of interest in the image in order to read a postal address automatically.

Abstract: A postal sorting machine (1) comprises sort outlets (7) distributed in one or more horizontal rows that are superposed and parallel. A bin transfer structure (3) is placed along said rows of sort outlets (7), said transfer structure (3) comprising one or more superposed bin conveyors (9) extending parallel to respective rows of sort outlets and one or more superposed gangways (10) that are movable along the rows of sort outlets (7), each extending between a row of sort outlets (7) and a corresponding bin conveyor (9) to enable at least one storage bin (4) to be transferred from a sort outlet (7) to a corresponding bin conveyor (9).

Abstract: The method of processing postal objects of large size in order to read automatically a postal address (AD) on each object consists in acquiring a digital image of each object at a certain level of resolution; in detecting in the image one or more zones of interest (ZI) apparently containing a postal address; in performing automatic address recognition on each zone of interest in order to extract a postal address (AD) of the object, and in the event of the automatic address recogition failing, in displaying each zone of interest (ZI) on a screen so that a video-coding operator can read the postal address (AD) of the object. Each zone of interest (ZI) is displayed on the screen on a screen context background (F) that is representative of the object but at a level of resolution that is lower than the level of resolution of the digital image and the zone of interest.

Abstract: The method for transforming a digital image (A) having several gray levels into a binary image (F) in which each pixel is coded over one bit, consists in applying, to each current pixel (P) of the digital image having several gray levels, several different parallel binarization processes (T1, T2, T3) each delivering as output a binary value for this current pixel and in combining (T4) the binary values delivered by the various binarization processes for each current pixel of the digital image having several gray levels so as to obtain a resultant binary value constituting the corresponding pixel of the binary image.

Abstract: In order to eliminate addressing errors on postal articles in a process (8, 10) of sorting, routing, and delivery performed by a postal operator on mail articles (3?) handed over to the operator by a sender of mail articles constituting a client of the postal operator, respective mail article identity numbers (I) are generated for the mail articles to be processed in the sorting, routing, and delivery process, said identity numbers (I) being applied to the respective mail articles in machine readable form (5) and being recorded in an electronic file (F) in association with data (A) giving the postal addresses of the mail articles. These mail article identity numbers (I) or “extended client codes” are generated by the mail article sender and they are applied by the sender to the mail articles prior to handing them over to the postal operator.