The Transorma could sort 15,000 letters per hour, double the amount that the same number of clerks could do by hand. The letter was then automatically transferred to a letter tray and deposited into one of 300 chutes. Operators read the destination and keyed a sorting code.
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The Transorma Letter Sorting Machine, manufactured by the Dutch company Werkspoor and distributed in the United States by Pitney Bowes, consisted of an upper and lower section, a conveyor belt transport and a series of five sorting keyboards.
To handle rapidly growing mail volumes, the United States Postal Service installed the first semiautomatic sorting machine on April 10, 1957. While early forms of a mechanical mail sorter were developed and tested in the 1920s, the first sorting machine was put into operation in the 1950s. Addresses were read and manually slotted into specific compartments. For much of the 20th Century, mail was sorted by hand using what is called a “pigeon-hole messagebox” method. The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original). Originally a public domain film, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied. Postal Service's Optical Character Recognition (OCR) machines, which allow mail to be sorted automatically." Support this channel: /jeffquitney OR /jeffquitney
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