You may have already learned how to ship a package through the United States Postal Service and maybe much experienced in doing so. There is no doubt that any person has more or less the need to send or receive a package, and most of them are much sophisticated about this. However, not every people knows about how their packages travel with USPS after they are carried by the post man from the mail box, a collection box or the local post office. Generally, your package carried by the U.S. Postal Service need to go through the below steps until it reaches to the recipient.
After you have packed your package and correctly attached the postage, you can put it in your mailbox and wait the postal carrier to take it to a local post office where he or she works. This is often the first time a post man meets your package and gather it from a place you just dropped off your item. The next stop you package will go to is the mail processing plant.
Culling and Postmarking
After packages have arrived at the mail processing plant, they will be classified by a culling machine according to the mail shape and size. The machine can also orient packages and make them face to one certain direction, usually with the addresses at the up right side. Then every package will be postmarked and printed a cancellation line to prevent people from reusing it, which can add the postal revenue. In a matter fact, the USPS do not use tax payer money but the money that the USPS gets it from its customers.
Scanning addresses and creating ZIP codes
Every package has a unique fluorescent bar code at its back and the address which will be scanned by an optical character reader on its front. After scanning, each package will then be assigned for an exclusive barcode which is sprayed on the front of the package. The barcode consists of tall and short bars used for all further sorting. The barcode sends a letter into a bin on the machine for a particular range of ZIP Codes; these identify the next processing plant. Those mails whose addresses cannot be identified would be left for manual sorting.
Transporting to the next processing plant
After ZIP codes have been created, mails will be transported to the next processing plant that serves the post office, either by air, sea or road. At that Plant, ZIP codes of mails will then be further sorted by a delivery barcode sorter into groups. At the same time, the barcode sorter can also arrange mails into the order of delivery.. A carrier is responsible for letters that within a certain ZIP code range and the delivery.
Transporting to Local Post Office and Delivering
Mails sorted out will be then loaded on a trunk by their responsible carrier and taken to the local post office, station, or branch in which the carrier works for final delivery.
From USPS Tracking Site