Metered application of imageable media
OwnerFernando Lopes, Jonathan William Goodin +1inventors
InventorsFernando Lopes, Jonathan William Goodin, Lesley M. Otsig
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Abstract
A printing plate is prepared by applying an imageable medium to a lithographic substrate by positive-displacement metering of the imageable medium. The method is applied in on-press platemaking machines, separate platemaking machines and plate coating machines.
Claims18
A method for applying a coating of thermally imageable material onto a lithographic base, said method comprising positive displacement metering of said thermally imageable material while said thermally imageable material is being applied to said lithographic base.
A method for applying a coating of negative-working thermally imageable material onto a lithographic base, said method comprising positive displacement metering of said negative-working thermally imageable material while said negative-working thermally imageable material is being applied to said lithographic base, said negative-working thermally imageable material comprising hydrophobic polymer particles, a material that absorbs the light from said laser and one or more of an inorganic salt, a metal complex, an organic base and an organic acid.
A method for applying a coating of thermally imageable material to a re-usable lithographic base, said method comprising metering of said thermally imageable material while said thermally imageable material is being applied to said re-usable lithographic base.
A method for applying a coating of imageable material to a lithographic base, said method comprising
- a. mounting said lithographic base on an imaging machine and
- b. metering said imageable material while said imageable material is being applied to said lithographic base.
A method for applying a coating of thermally imageable material to a lithographic base, said method comprising
- a. mounting said lithographic base on an imaging machine and
- b. positive displacement metering of said thermally imageable material while said thermally imageable material is being applied to said lithographic base.
A method for applying a coating of thermally imageable material to a hydrophilic lithographic base, said method comprising
- a. Mounting said hydrophilic lithographic base on a imaging machine and
- b. positive-displacement metering of said thermally imageable material while said thermally imageable material is being applied to said hydrophilic lithographic base,
- said thermally imageable material comprising hydrophobic thermoplastic polymer particles dispersed in a non-hardened hydrophilic binder and a compound capable of converting light to heat.
A method for making a thermally imageable printing plate, said method comprising
- a. mounting a hydrophilic lithographic base on an imaging machine,
- b. preparing a thermally imageable medium, said preparing comprising making an emulsion of hydrophobic polymer particles, a material that absorbs the light from said laser and one or more of an inorganic salt, a metal complex, an organic base and an organic acid.
- c. positive-displacement metering said imageable material while said thermally imageable material is being applied to said hydrophilic lithographic base.
An apparatus for applying a coating of imageable material to a lithographic base, said apparatus comprising
- a. a positive displacement metering unit disposed to meter said imageable material,
- b. an imageable material applicator disposed to apply a coating of said imageable material onto said lithographic base.
Dependencies are inferred from the claim text.