Dosing system for inking up rollers in a printing machine
AssigneeMAN Roland Druckmaschinen AG
InventorsHubert Zschetzsche, Peter Hummel, Robert Ortner
Life of this patent
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Abstract
An ink metering system for a roller train in a printing machine which in the illustrated embodiment includes a fountain roller and a downstream train of rollers communicating with a plate or form cylinder of the printing press. One or more plating devices (12) are provided which each have a plate-like element (19) adjustably positionable with respect to a respective roller for leveling ink on the surface of the roller before or after passage through a contact zone with an adjacent roller in which ink is pulled off and separated between the rollers. The plating devices are relatively simple in construction and operation and provide stable ink guidance on the roller surfaces that noticeably improves print quality.
Claims22
A printing machine comprising at least one printing cylinder, at least one roller train leading to the printing cylinder, a storage container of liquid printing medium, a metering system for metering the printing medium onto the roller train, said roller train comprising rollers in contact with each other at respective contact zones where pulling off and separation of the printing medium occurs between rollers as surfaces of the rollers pass through the respective contact zone, and a plating device (12) adjustably positioned a small distance relative to an outer surface of one of the rollers (1-6) after a contact zone (10) of the one roller in the direction of rotation of the one roller for leveling the remaining ink on the surface of the one roller after passage through the contact zone.
A printing machine comprising at least one printing cylinder, at least one roller train leading to the printing cylinder, a storage container of liquid printing medium, a metering system for metering the printing medium onto the roller train, said roller train comprising rollers in contact with each other at respective contact zones where pulling off and separation of the printing medium occurs between rollers as surfaces of the rollers pass through the respective contact zone, a plating device (12) adjustably positionable relative to an outer surface of one of the rollers (1-6) after a contact zone (10) of the one roller in the direction of rotation of the one roller for leveling the remaining ink on the surface of the one roller after passage through the contact zone, and a second plating device (12) adjustably positionable with respect to the outer surface of at least one roller (1-6) before the contact zone of the at least one roller in the direction of rotation of said at least one roller for smoothing ink on the surface of said at least one roller.
A printing machine comprising at least one printing cylinder, at least one roller train leading to the printing cylinder, a storage container of liquid printing medium, a metering system for metering the printing medium onto the roller train, said roller train comprising rollers in contact with each other at respective contact zones where pulling off and separation of the printing medium occurs between rollers as surfaces of the rollers pass through the respective contact zone, and a plating device (12) adjustably movable in a tangential direction with respect to an outer surface of one of the rollers (1-6) after a contact zone (10) of the one roller in the direction of rotation of the one roller for leveling the remaining ink on the surface of the one roller after passage through the contact zone.
A printing machine comprising at least one printing cylinder, at least one roller train leading to the printing cylinder, a storage container of liquid printing medium, a metering system for metering the printing medium onto the roller train, said roller train comprising rollers in contact with each other at respective contact zones where pulling off and separation of the printing medium occurs between rollers as surfaces of the rollers pass through the respective contact zone, a plating device (12) adjustably positionable relative to an outer surface of one of the rollers (1-6) in said roller train for leveling the remaining ink on the surface of the one roller after passage through the contact zone, said one roller being an ink fountain roller (1) associated with an ink fountain (9) having an ink metering device (8), and said plating device 12 being adjustably positionable with respect to the ink fountain roller (1) at a location in the direction of rotation of the ink fountain roller (1) after a contact zone (10) with a downstream roller (2, 6) and before the ink metering device (8).
A printing machine comprising at least one printing cylinder, at least one roller train leading to the printing cylinder, a storage container of liquid printing medium, a metering system for metering the printing medium onto the roller train, said roller train comprising rollers in contact with each other at respective contact zones where pulling off and separation of the printing medium occurs between rollers as surfaces of the rollers pass through the respective contact zone, a plating device (12) adjustably positionable relative to an outer surface of one of the rollers (1-6) after a contact zone (10) of the one roller in the direction of rotation of the one roller for leveling the remaining ink on the surface of the one roller after passage through the contact zone, and said plating device 12 having a plating element (19) biased against the one cylinder by a compression spring.
The printing machine of 17, in which said plating device can be set against an outer surface of the one roller (1) with a uniform surface pressure applied across the longitudinal length of the one roller (1) by the plating device (12).
The printing machine of claim of 17, in which the printing device (12) has a plating element (19) with an end located at a secant point on the outer surface of the one roller.
A printing machine comprising at least one printing cylinder, at least one roller train leading to the printing cylinder, a storage container of liquid printing medium, a metering system for metering the printing medium onto the roller train, said roller train comprising rollers in contact with each other at respective contact zones where pulling off and separation of the printing medium occurs between rollers as surfaces of the rollers pass through the respective contact zone, a plating device (12) adjustably positionable relative to an outer surface of one of the rollers (1-6) after a contact zone (10) of the one roller in the direction of rotation of the one roller for leveling the remaining ink on the surface of the one roller after passage through the contact zone, and said plating device (12) having a plating element (19) with an end located at a tangent point on the outer surface of the one roller (1).
The printing machine of claim of 21 in which said plating device (12) has a plating element (19) with an end located at a predetermined small distance beyond the outer surface of the one roller.
Dependencies are inferred from the claim text.