Graphic arts printing plate production by a continuous jet drop printing with asymmetric heating drop deflection
AssigneeEastman Kodak Company
InventorCharles D. DeBoer
Life of this patent
Estimating the term…
Abstract
A graphic arts printing apparatus includes a delivery channel for hydrophobic liquid; a source of pressurized hydrophobic liquid communicating with the delivery channel; a nozzle bore which opens into the delivery channel to establish a continuous flow of hydrophobic liquid in a stream; and a droplet generator which causes the stream to break up into a plurality of droplets at a position spaced from the stream generator. The droplet generator includes a heater having a selectively-actuated section associated with only a portion of the nozzle bore perimeter, whereby actuation of the heater section produces an asymmetric application of heat to the stream to control the direction of the stream between a print direction and a non-print direction.
Claims10
A graphic arts printing apparatus for image-wise applying drops of hydrophobic liquid to a lithographic printing plate by way of a jet drop printer in which a continuous stream of hydrophobic liquid is emitted from a nozzle;
- said apparatus comprising:
- a delivery channel for hydrophobic liquid;
- a source of pressurized hydrophobic liquid communicating with the delivery channel;
- a nozzle bore which opens into the delivery channel to establish a continuous flow of hydrophobic liquid in a stream, the nozzle bore defining a nozzle bore perimeter;
- and
- a droplet generator which causes the stream to break up into a plurality of droplets at a position spaced from the stream generator, said droplet generator including a heater having a selectively-actuated section associated with only a portion of the nozzle bore perimeter, whereby actuation of the heater section produces an asymmetric application of heat to the stream to control the direction of the stream between a print direction and a non-print direction.
A graphic arts printing apparatus for image-wise applying drops of hydrophobic liquid to a lithographic printing plate by way of a jet drop printer in which a continuous stream of hydrophobic liquid is emitted from a nozzle;
- said apparatus comprising:
- a delivery channel for hydrophobic liquid;
- a source of pressurized hydrophobic liquid communicating with the delivery channel;
- a nozzle bore which opens into the delivery channel to establish a continuous flow of hydrophobic liquid in a stream, the nozzle bore defining a nozzle bore perimeter;
- and
- a droplet generator which causes the stream to break up into a plurality of droplets at a position spaced from the stream generator, said droplet generator including a heater having a selectively-actuated section associated with only a portion of the nozzle bore perimeter, whereby actuation of the heater section produces an asymmetric application of heat to the stream to control the direction of the stream between a print direction and a non-print direction, wherein said heater has a two selectively-actuated sections which are independently actuated and positioned along respectively different portions of the nozzle bore perimeter, whereby selective actuation of the heater sections produces an asymmetric application of heat to the stream to control the direction of the stream between a print direction and a non-print direction.
A process for controlling hydrophobic liquid in a continuous jet drop graphics arts printer in which a continuous stream of hydrophobic liquid is emitted from a nozzle;
- said process comprising the steps of:
- establishing a continuous flow of hydrophobic liquid in a stream which breaks up into a plurality of droplets at a position spaced from the stream generator, and
- asymmetrically applying heat to the stream before the position whereat the stream breaks up into droplets to thereby control the direction of the stream between a lithographic printing plate and a non-print direction.
A process for controlling hydrophobic liquid in a continuous jet drop graphics arts printer in which a continuous stream of hydrophobic liquid is emitted from a nozzle;
- said process comprising the steps of:
- establishing a continuous flow of hydrophobic liquid in a stream;
- causing the stream to break up into a plurality of droplets at a position spaced from the nozzle;
- and
- asymmetrically applying heat to the stream before the position whereat the stream breaks up into droplets to thereby control the direction of the stream between a lithographic printing plate and a non-print direction.
Dependencies are inferred from the claim text.