Patent ID: 7306219
Filing Date: 2007-12-11
Classification: B65H,Y10S

Abstract:
1. A device for reversal of direction of planar letters in letter sorting systems, comprising: an introducing cover band conveyor means having two endless circulating belts between which the letters are transported clamped one after another, a junction for separating the letters alternately onto two cover band transport runs running at an acute angle to each other, each with two endless belts, to each of which a controlled and reversibly-driven conveyor run, in which the letters are also transported clamped, is connected, wherein both conveyor runs are driven by a drive roller arranged between them and the letters are carried at such an enfolding angle around the drive roller that the letters taking into account the frictional forces, are braked and accelerated substantially without slipping, wherein each conveyor run is configured so that it carries the letters, when transporting them back, at an acute angle to the relevant introducing cover band transport run into a removing cover band transport means with two endless belts, wherein a drive control of the drive roller is configured so that, on entry of a subsequent postal letter into one of the conveyor runs, back-transported postal letter is already accelerated to its rated speed, braking is only started when a rear edge of the subsequent postal letter has left the cover band transport run and the preceding letter is no longer clamped in the controlled and reversibly-driven conveyor run, and wherein the letters in the device are carried in the device by friction at all times.