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US 6,192,800 B1Granted
Method and apparatus for handling printed sheet material
AssigneeHoward W. DeMoore
InventorsHoward Warren DeMoore, John Andrew Branson
Life of this patent
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AssigneeHoward W. DeMoore
InventorsHoward Warren DeMoore, John Andrew Branson
Estimating the term…
A support cylinder for guiding freshly processed substrate material between printing units or at the delivery end of a printing press is provided with a low coefficient of friction, semi-conductive covering for supporting and transporting the freshly processed substrate material without smearing the ink or causing indentations on the surface of the substrate. Radially projecting surface portions define electrostatic precipitation points and reduce the surface area available for frictional engagement. The low friction and electrostatically neutral properties of the semi-conductive base covering permit free movement of the freshly processed substrate relative to the support cylinder surface. Electrostatic charges carried by the processed substrate are discharged through the semi-conductive base covering into the support cylinder, thus eliminating electrostatic cling attraction between the freshly processed substrate and the support cylinder.
A method for supporting a processed substrate as it is transferred from a processing unit of a printing press, comprising the steps of:
In the operation of a printing press having a support cylinder mounted adjacent to an impression cylinder for guiding a freshly processed substrate, the improvement comprising the step of discharging electrostatic charges from the freshly processed substrate through a semi-conductive base covering disposed on the support cylinder.
A method for handling a printed substrate in a rotary offset press having multiple printing units, each printing unit employing a blanket cylinder and an impression cylinder for printing an image onto one side of a substrate transferring between, comprising the following steps performed at each printing unit in succession:
In a support cylinder having substrate support surface for guiding a freshly processed substrate as it is transferred from one printing unit to another, the improvement comprising:
A support cylinder for guiding a freshly processed substrate as it is transferred from one printing unit to another comprising, in combination:
A support cylinder for guiding a freshly processed substrate as it is transferred from one printing unit to another comprising, in combination:
Dependencies are inferred from the claim text.