Arrangement and method for controlling a spray outline from a spray assembly at a printing press
AssigneeBaldwin Jimek AB
InventorBirger Hansson
Life of this patent
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Abstract
An arrangement for controlling a spray distribution of a pulse width modulated spray dampener at a printing press comprises a spray beam (110), a number of spray units (120) fastened to the spray beam, and a housing (300) at least partly enclosing the spray units. The housing is arranged such that at least a part of the sprays emitted from the spray units (120) is screened off from escaping the housing, and an individually formed screen surface (130) is configured to control the spray distribution by screening off spray portions from escaping the housing.
Claims10
An arrangement for controlling a spray distribution of a pulse width modulated spray dampener at a printing press, said arrangement comprising a spray beam having a number of spray units, and a housing at least partly enclosing the spray units wherein the housing is arranged such that at least a part of the sprays emitted from the spray units is screened off from escaping the housing by an individually formed screen surface configured to control the spray distribution by screening off a spray portion of the spray from escaping the housing, wherein the spray portion not screened off is emitted from the spray units with a travelling velocity being higher than the surrounding air, through which said spray portion travels, until said spray portion hits a printing roll.
Method for controlling a spray distribution of a pulse width modulated spray dampener at a printing press, said dampener comprising a spray beam having a number of spray units, and a housing at least partly enclosing the spray units, wherein the housing is arranged such that at least a part of the sprays emitted from the spray units is screened off from escaping the housing, comprising the steps of:
- I. mounting the spray beam in front of a printing roll;
- and
- II. mounting an individually formed screen between the spray beam and the printing roll, wherein the individually formed screen is configured to control the spray distribution by screening off a spray portion of the spray from escaping the housing,
- III. controlling the spray units to emit a spray, whereof at least the spray portion not being screened off has a travelling velocity being higher than the surrounding air, through which said spray portion travels, until said spray portion hits the printing roll.
Dependencies are inferred from the claim text.