A duplex check printer includes an upper document path, a print head at one side of the upper document path, and a lower document path having a loop to invert a check so that information can be printed on both sides of the check. The check is driven within the upper document path by feed rolls, which...http://www.google.fr/patents/US6966714?utm_source=gb-gplus-shareBrevet US6966714 - Duplex check printer having a separately driven document inverting loop
Duplex check printer having a separately driven document inverting loop
