Abstract: Method for correcting gaps between mail items Given that the actual gaps b of a mail stream are smaller than the minimum gaps c which are required for processing, every xth mail item, where x=(a+b)/(c−b), with a=the average mail item length, is ejected. The mail stream is then divided by alternately supplying the mail items to two gap-correcting units, in which said mail items are shifted to the ejection gaps in such a way that the required minimum gaps are attained after both partial mail streams have been combined.

Abstract: The invention relates to a device to change the speed of individual flat shipments that are jammed and displaced one behind the other on a two-part conveyance system. In order to carry out any desired speed changes, without subjecting the shipments to pull or strain, a first conveyance device is located in front of a second conveyance device with controllable speed. The first conveyance device is normally driven at the speed of the inputting part of the conveyance system and does not exert a propelling or braking effect on the relevant delivery when it is blocked on the second conveyance device with controllable speed.