Abstract: Device for conveying flat objects (1), held vertically, at high speed between processing equipment items, and in particular for conveying mail envelopes. This device comprises: a stationary baseplate (3) extending from one equipment item to the other, a motorized reference belt (4) stretched over a set of vertical pulleys (7) and extending above the baseplate along the conveying path between equipment items; a motorized press belt (5) mounted in such a way that it can be pressed against the reference belt along the conveying path; a series of defonnable wheels (6) along the conveying path between equipment items, which can come to bear against the press belt in the zone where the latter presses against the reference belt, so as to grip the conveyed envelopes appropriately in spite of the differences in thickness between envelopes.

Abstract: An apparatus for printing any documents and making them unfalsifiable and comprising a casing fitted on the body of a printer at its part receiving the discharged and printed documents and which contains means for heating one side of the printed document for the impregnation and the transfer of the printing ink throughout the thickness of the document so as to make appear on the other side thereof an exact replica with inverted writing of the printings previously made on the document such as a bank document, cheque letter or transfer order.