Method and apparatus for controlling the toner concentration in an electrographic process

摘要

In a method and apparatus for adjusting an electrographic printing or copying process, information to be printed is generated as a toner intermediate image on a support for intermediate images and is subsequently transmitted from a reprinting surface to a recording medium at a transfer printing zone. A toner mark is produced on an electrographic support for intermediate images. The toner mark is at least partially scanned on the support for intermediate images and is then removed from the support for intermediate images. The toner Ad concentration is adjusted in a developing station by means of a measured value based on scanning the toner mark. Transfer of the toner intermediate image from the reprinting surface to the recording medium at the transfer printing zone is at least temporarily prevented in the period between the production and the removal of the toner mark.