Washing Arrangement for rotary printer
AssigneeHycorr Machine Corporation
InventorFrederick W. Harrison
Life of this patent
Estimating the term…
Abstract
A washing apparatus for a printing roll, particularly a flexographic printing roll having raised printing areas. The washing apparatus includes a troughlike housing provided with an open mouth positioned adjacent the peripheral surface of the printing roll. The housing, surrounding the open mouth, has sealing strips which engage the print roll surface. First and second nozzles are mounted in the housing for respectively discharging streams of cleaning liquid and rinsing liquid against the periphery of the roll as it moves past the mouth of the housing. A brush is positioned within the housing for contacting the print areas on the roll generally between the regions contacted by the nozzle streams. The liquid and debris collect within the housing, and are sucked therefrom for exterior discharge.
Claims26
A washing arrangement for removing ink and debris from a printing plate mounted on a rotatable printing roll, said cleaning arrangement comprising:
- an elongate channellike housing having an open mouth along one side thereof adapted to be positioned in close proximity to a peripheral surface of the printing roll, said housing defining therein an interior chamber including a lower reservoir for collecting liquid and debris;
- edge sealing strips mounted on said housing in surrounding relationship to the mouth, said edge sealing strips being disposed for contact with the peripheral surface of the printing roll;
- a first spray bar mounted adjacent the housing and including a plurality of longitudinally spaced first nozzles for discharging cleaning liquid through the mouth of the housing onto the surface of the printing roll, and said first spray bar being connected to a first source which supplies the cleaning liquid to the respective first nozzles;
- a second spray bar mounted adjacent the housing and including a plurality of longitudinally spaced second nozzles for discharging rinse liquid through the mouth of the housing onto the surface of the printing roll, said second spray bar being connected to a second source for supplying rinse liquid to the respective second nozzles, and said second nozzles being mounted on said housing relative to said first nozzles such that the rinse liquid discharged from said second nozzles contacts a region of said printing roll which is positioned downstream of the region of the printing roll contacted by the cleaning liquid discharged by said first nozzles;
- and
- a drain member communicating with the reservoir of said housing for discharging the liquids and debris from the housing.
In a printing arrangement having an axially elongated print roll supported for rotation about a generally horizontally extending axis, said print roll having a surrounding peripheral surface defining ink-bearing print areas thereon, and a cleaning arrangement positioned adjacent and extending longitudinally along the print roll at a selected peripheral location for permitting removal of ink and debris from the peripheral surface of the print roll, the improvement wherein said cleaning apparatus comprises:
- an elongate troughlike housing positioned adjacent and extending longitudinally along said print roll, said housing defining therein an interior compartment, and said housing having an elongate opening formed on one side thereof which is positioned closely adjacent and directly faces the peripheral surface of the print roll when the housing is in said selected location;
- a first spray nozzle positioned within said housing for discharging a pressurized cleaning liquid outwardly through the opening for impingement against a first peripheral region of the print roll;
- a second spray nozzle positioned interiorly of the housing for discharging a pressurized rinse liquid outwardly through the opening for impingement against a second peripheral region of the print roll which is spaced circumferentially from said first peripheral region;
- a longitudinally elongate brush positioned within said housing and extending longitudinally thereof, said brush having bristles which project outwardly of the opening for contact with the print areas on the print roll;
- and
- a passage-defining element communicated with the interior compartment of said housing for permitting discharge of liquids and debris therefrom.
A washing arrangement for removing ink and debris from a printing plate mounted on a rotatable printing roll, said cleaning arrangement comprising:
- first spray means mounted adjacent the printing roll and including a plurality of longitudinally spaced first nozzles for discharging cleaning liquid therefrom against a first peripheral region of the printing roll, said first spray means being connected to a first source which supplies the cleaning liquid to the respective first nozzles;
- second spray means mounted adjacent the printing roll and including a plurality of longitudinally spaced second nozzles for discharging rinse liquid therefrom against a second peripheral region of the print roll which is spaced downstream of the first peripheral region, said second spray means being connected to a second source for supplying rinse liquid to the respective second nozzles;
- a longitudinally elongated brush positioned adjacent and extending longitudinally along the printing roll adjacent the peripheral surface thereof, said brush being disposed for contacting the peripheral surface of the printing roll at a region which is at or downstream of said first region but upstream of said second region, said brush having bristles which project outwardly for contact with the printing roll;
- and
- a liquid-collecting reservoir positioned downwardly from and generally under said first and second nozzles and said first and second peripheral regions for collecting the liquid which is sprayed against the periphery of the printing roll.
Dependencies are inferred from the claim text.