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US 4,574,445 AGranted
Method and apparatus for manufacturing a nozzle plate for ink-jet printers
AssigneeU.S. Philips Corporation
InventorsHorst Bentin, Michael Doring, Horst Kronenberg, Werner Jeglinski
Life of this patent
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Abstract
Nozzles are formed in a plate for an ink-jet printer by holding a metal foil tightly against the side of the plate from which the nozzle is to protrude, and then pressing and punching through the plate and the metal foil together, through an aperture of a pressing die into a cushion of a hard elastic material such as lead. The foil is made of an isotropic material which is harder than that of the nozzle plate, and is preferably an amorphous or microcrystalline metal.
Claims10
A method of manufacturing a nozzle plate for an ink-jet printer, including
- aligning a pressing and punching tool having dimensions corresponding to the internal dimensions of a nozzle to be formed, opposite a pressing die having a circular aperture and a press mold formed by a cushion which is an elastic block, and
- in a single operation, using the tool to locally press the plate into the circular aperture, and then punching through the plate into the elastic block during further pressing of the tool,
- wherein the improvement comprises the steps of providing a metal foil made of an isotropic material which is harder than said plate,
- positioning the metal foil tightly against that side of the plate which is remote from the tool,
- pressing and punching the foil through the circular aperture together with the plate during said single operation.
2 more elements
Dependencies are inferred from the claim text.