Bernoulli-effect web stabilizer

Details Bernoulli-effect web stabilizer Bernoulli-effect web stabilizer

G - Physics

05

D

341/41, 101/75

G05D 3/12 (2006.01) B41F 5/16 (2006.01) B41F 13/12 (2006.01) B41F 33/00 (2006.01)

Patent

CA 2007844

ABSTRACT OF THE DISCLOSURE A system and method for generating indicia of registration error between respective, separately adjustable printing units of a printing press, the printing units cooperating to print an image on a moving web, the system being of the type comprising a photo optical control, having a field of view and depth-of- field, for generating output signals indicative of a predetermined relative disposition of marks on a web passing through the field of view within the depth-of- field of the photo-optical control as the web moves in relation to the printing units, and processing circuits, responsive to the photo-optical output signals, for generating signals indicative of deviations of the registration marks printed by the printing units from the predetermined relative disposition; improved wherein: the photo-optical control is disposed proximate to the printing units, and, having associated therewith an air driven stabilizer structure for maintaining the web within the depth of field by creating a Bernoulli effect.

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