Advancing material of indeterminate length – With material-responsive control means – To regulate longitudinal movement of material
Patent
1992-09-03
1995-03-07
Hail, III, Joseph J.
Advancing material of indeterminate length
With material-responsive control means
To regulate longitudinal movement of material
226 45, B65M 2602
Patent
active
053950275
ABSTRACT:
To provide a compact monitoring unit for substrate webs passing through a printing machine, typically paper webs, and thereby provide rapid response of damage control units, such as paper capturing rollers, small tears, fissures or holes in the substrate webs are sensed by locating an elongated light source (12) below the web, the light source extending beyond the lateral sides of the web to be supervised; an optical scanner (2) formed of a plurality of light guides (4) within a plastic block (5a) provides signals representative of light shining through damaged areas, and on the side of the web. The light guides then are bundled or compressed in a bundling or compression element (6), and the outputs thereof are applied to a charge coupled device sensor chip (7), directly, without intervention of optical systems, the charge coupled device being in turn connected to an evaluation and control unit which can provide "damaged web" signals to the damage control unit itself through a suitable output coupling.
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Darling John P.
Hail III Joseph J.
MAN Roland Druckmaschinen AG
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