reference now to the drawings the known tri roll inverter 10 of the prior art is shown such a tri roll inverter is used for example in the xerox igen u00ae and includes an input nip formed by rollers 12 and 14 and an output nip formed between rollers 14 and 16 collectively a tri nip roll input and output baffles 18 and 20 guide copy sheets into and out of the inverter a corrugation system or reversing system 22 includes a nip formed between rollers 24 and 26 which corrugates copy sheets entering the nip as they are driven by the input nip in the direction of arrow 28 and as the copy sheets are driven out of the inverter in the direction of arrow 30 upon entry of the lead edge of a copy sheet 34 the copy sheet is propelled into the corrugator driver 26 of corrugation system the copy sheet follows the baffle into the corrugator where there is force applied throughout the remaining length of the copy sheet this decreases the speed of the copy sheet when the trail edge of the copy sheet clears the tri roll input nip the corrugator roller 26 slows the sheet to a stop reverses the motor direction accelerates the sheet back to the tri roll velocity then delivers the sheet to the tri roll output path it then slows down and stops after the tail end of the outgoing sheet has cleared the corrugating roll reverses direction and accelerates up to the tri roll velocity to accept the next sheet in order to achieve 250 papers per minute ppm.