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US 5,375,522 AGranted
Method and apparatus for washing a printing press in conjunction with a damping unit
AssigneeHeidelberger Druckmaschinen AG
InventorRudi Junghans
Life of this patent
Estimating the term…
Abstract
A method of washing a printing press with a washing apparatus, wherein the washing apparatus is configured to provide washing solution to several of the rollers and cylinders of the printing press for washing the rollers and cylinders. Effective washing of various rollers and cylinders of the printing press, and especially the transfer of washing solution to various rollers and cylinders, including the rollers and cylinders of the damping unit, is facilitated while the transfer of washing solution to the damping medium reservoir is generally avoided.
Claims17
A method for washing the cylinders end the rollers of an offset printing press, the offset printing press including:
- an inking unit;
- a blanket cylinder;
- a plate cylinder being disposed adjacent the blanket cylinder;
- a washing unit for supplying a washing solution to the blanket cylinder and being disposed adjacent the blanket cylinder;
- and a damping unit, the damping unit comprising:
- a damping medium reservoir for containing damping medium, a form roller, being disposed adjacent the plate cylinder, for transferring damping medium to the plate cylinder, a metering roller, being disposed adjacent the damping unit form roller, for transferring damping medium to the damping unit form roller, and a damping medium transferring roller for transferring damping medium between the damping medium reservoir and the damping unit metering roller, means for selectively engaging the damping medium transferring poller with the damping unit metering roller;
- said method comprising the steps of:
- performing a printing job with the printing press;
- performing the following steps during said printing job:
- immersing at least a portion of the damping medium transferring roller in the damping medium reservoir to receive damping medium from the damping medium reservoir;
- engaging the damping medium transferring roller with the damping unit metering roller;
- engaging the damping unit metering roller with the damping unit form roller;
- transferring damping medium from the damping medium transferring roller to the damping unit metering roller;
- transferring damping medium from the damping unit metering roller to the damping unit form roller;
- transferring damping medium from the damping unit form roller to the plate cylinder;
- subsequent to said printing job, washing a plurality of cylinders end rollers of the printing press by way of the following steps;
- transferring washing solution from the washing unit to the blanket cylinder;
- transferring washing solution from the blanket cylinder to the plate cylinder;
- transferring washing solution from the plate cylinder to the damping unit form roller;
- transferring washing solution from the damping unit form roller to the damping unit metering roller;
- washing, by means of the washing solution, the blanket cylinder, the plate cylinder, the damping unit form roller and the damping unit metering roller;
- and
- disengaging the damping medium transferring roller from contact with the damping unit metering roller, to prevent, during said washing step, the transfer of washing solution from the damping unit metering roller to the damping medium transferring roller and the damping medium reservoir.
20 more elements
A mechanism for applying at least one of a damping medium and an ink in a printing press, said printing press comprising:
- a plate cylinder;
- a blanket cylinder;
- means for selectively engaging said blanket cylinder with said plate cylinder;
- ink reservoir means for containing a supply of the ink;
- ink transfer means for transferring the ink from said ink reservoir means to said plate cylinder, said ink transfer means comprising:
- at least a first applicator roller receiving ink from said ink reservoir means, said first applicator roller being in contact with said plate cylinder, and a further roller, said further roller for receiving a portion of the ink transferred from said ink reservoir means;
- a washing apparatus for supplying washing fluid to said blanket cylinder for washing at least said blanket cylinder;
- and means for selectively engaging said washing apparatus with said blanket cylinder;
- said mechanism comprising:
- at least a second applicator roller;
- a damping medium reservoir for containing a supply of said damping medium;
- a damping medium transfer roller being disposed and configured for being at least partly immersed in said damping medium reservoir for receiving damping medium from said damping medium reservoir;
- shifting means for selectively shifting said second applicator roller between at least a first position, wherein said second applicator roller is in contact with said plate cylinder and is also in contact with said further roller, and a second position, wherein said second applicator roller is in contact with said plate cylinder and is not in contact with said further roller;
- a damping unit roller, separate from said damping medium transfer roller, for contacting said second applicator roller;
- said damping medium transfer roller for transferring said damping medium between said damping medium reservoir and said damping unit roller;
- said damping unit roller for transferring said damping medium between said damping medium transfer roller and said second applicator roller;
- means for maintaining contact between said damping unit roller and said second applicator roller during a washing operation;
- and
- means for moving said damping medium transfer roller to selectively position said damping medium transfer roller into:
- a first position, wherein said damping medium transfer roller is engaged with said damping unit roller to permit the transfer of damping medium between said damping medium transfer roller and said damping unit roller during a printing job;
- and
- a second position, wherein said damping medium transfer roller is disengaged from contact with said damping unit roller to prevent, during a washing operation:
- the transfer of damping medium between said damping medium transfer roller and said damping unit roller;
- and
- the transfer of washing solution from said damping unit roller to said damping medium transfer roller and said damping medium reservoir.
22 more elements
Apparatus for washing the cylinders and the rollers of an offset printing press, said offset printing press including an inking unit, a blanket cylinder, a plate cylinder being selectively engageable with said blanket cylinder, a washing unit for supplying a washing solution to said blanket cylinder and being disposed adjacent said blanket cylinder, and a damping unit, said damping unit comprising:
- a damping medium reservoir for containing damping medium,
- a form roller, being disposed adjacent said plate cylinder, for transferring damping medium to said plate cylinder,
- a metering roller, being disposed adjacent said damping unit form roller, for transferring damping medium to said damping unit form roller,
- a damping medium transferring roller for transferring damping medium between said damping medium reservoir and said damping unit metering roller, said damping medium transferring roller being disposed adjacent said damping medium metering roller,
- said damping medium transferring means comprising a damping medium transferring roller, and
- said damping medium transferring roller being disposed and configured for being at least partly immersed in said damping medium reservoir to receive damping medium from the damping medium reservoir;
- said apparatus comprising:
- means for selectively engaging said washing unit with said blanket cylinder;
- means for selectively engaging said plate cylinder with said blanket cylinder;
- means for selectively engaging said damping unit form roller with said plate cylinder;
- means for selectively engaging said damping unit metering roller with said damping unit form roller;
- said means for selectively engaging said damping unit metering roller with respect to said damping unit form roller comprising means for maintaining contact between said damping unit metering roller and said damping unit form roller during a washing operation;
- means for moving said damping medium transferring roller to selectively disengage said damping medium transferring roller from contact with said damping unit metering roller to prevent, during a washing operation, the transfer of washing solution from said damping solution from said damping unit metering roller to said damping medium transferring roller and said damping medium reservoir;
- said apparatus being configured for:
- transferring washing solution from said washing unit to said blanket cylinder;
- transferring washing solution from said blanket cylinder to said plate cylinder;
- transferring washing solution from said plate cylinder to said damping unit forme roller;
- transferring washing solution from said damping unit forme roller to said damping unit metering roller;
- washing, by means of said washing solution, said blanket cylinder, said plate cylinder, said damping unit forme roller and said damping unit metering roller;
- and
- preventing, during a washing operation, the transfer of washing solution from said damping unit metering roller to said damping medium transferring roller and said damping medium reservoir.
18 more elements
Dependencies are inferred from the claim text.