Device for damping bending vibrations in a cylinder of a rotary printing press
AssigneeHeidelberger Druckmachinen AG
InventorsMarkus Gerstenberger, Gerd Raasch
Life of this patent
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Abstract
A device for damping bending vibrations in a printing-unit cylinder of a rotary printing press includes at least one damper disposed in a printing-unit cylinder and tunable to a wide-band frequency, the damper having at least one member with a natural frequency corresponding to a natural frequency of the printing-unit cylinder, and a device for supporting the damper member so that the damper member is deflected in phase opposition to a deflection of the printing-unit cylinder.
Claims4
Device for damping bending vibrations in a printing-unit cylinder of a rotary printing press, comprising at least one damper disposed in a printing-unit cylinder and tunable to a wide-band frequency, said damper having a pair of members with a natural frequency corresponding to a natural frequency of the printing-unit cylinder, and means for supporting said pair of damper members so that said damper members are deflected in phase opposition to a deflection of the printing-unit cylinder, each of said damper members being a bending rod, and said supporting means being a supporting structure rigid with the printing-unit cylinder, said bending rod being received with clearance in a bore formed in the printing-unit cylinder and being attached at one end thereof to said supporting structure and being free at the other end thereof, said bore bring coaxial with the printing-unit cylinder and constituting an elongated chamber occupied at one end thereof by said bending rod, and having a remaining space filled with a liquid medium having damping properties.
Dependencies are inferred from the claim text.