Patent ID: 8437681
Filing Date: 2013-05-07
Classification: B41J,G03G

Abstract:
1. A method for aligning a transverse fold and adjacent adjustment page marks associated with a page on a web-shaped carrier material at a desired position before printing upstream of a transfer printing point where the printing occurs on said page following said transverse fold, said carrier material having a plurality of said transverse folds and associated page marks, and the carrier material being accelerated for said printing from a stop state when said transverse fold is at said desired position, comprising the steps of: aligning one of the transverse folds with respect to a fold alignment member by moving said carrier material; providing a first sensor arrangement and determining a position of the adjacent page marks relative to said transverse fold by use of said first sensor arrangement; providing a second sensor arrangement downstream of the first sensor arrangement and upstream of said transfer printing point; transporting the carrier material until a next arriving page mark is detected by said second sensor arrangement for determining a zero position of said carrier material so that positions of all further page marks start from this determined zero position and positions of all other transverse folds can be determined based on the transverse fold at the fold alignment member and stored carrier material parameters; transporting the carrier material at a known transport speed by a preset number of page marks to determine a transport time and calculating an actual distance between adjacent page marks with aid of the transport time and said known transport speed; calculating a deviation of a transverse fold at said transfer printing point; calculating a number of page marks and for what transfer time the carrier material must be further conveyed; transporting the carrier material by said calculated number of page marks so that said transverse fold is positioned at said desired position before said transfer printing point; and starting transfer printing on said carrier material by starting movement of the carrier material after said stop state when said transverse fold is positioned at said desired position.