US 6,598,957 B2 · Recording head and process for producing the same

Abstract

The recording head of an ink-jet printer includes a main body having ink ejection devices and a device for driving the ink ejection devices independently and an orifice plate attached to the main body having ink ejection orifices opened in positions corresponding to the ink ejection devices. At least one side of the orifice plate is made of fluoroplastic, a surface of one side of the orifice plate made of the fluoroplastic has been treated to become more water-repellent than a bulk material of the fluoroplastic itself and a surface of the other side of the orifice plate attached to the main body is more hydrophilic than the bulk material. The surface of one side of the orifice plate made of the fluoroplastic and treated to become more water-repellent contains more fluorine atoms than are inherently present in the fluoroplastic in an untreated state.

Claims8

Dependent claims

A recording head of an ink-jet printer comprising:

a main body having ink ejection devices and a device for driving said ink ejection devices independently;
and
an orifice plate that is attached to said main body and which has ink ejection orifices opened in positions corresponding to said ink ejection devices;
wherein
at least one side of said orifice plate is made of fluoroplastic, a surface of one side of said orifice plate which is made of the fluoroplastic has been treated to become more water-repellent than a bulk material of the fluoroplastic itself and a surface of the other side of said orifice plate which is attached to said main body is more hydrophilic than said bulk material of the fluoroplastic;
and
said surface of said one side of said orifice plate made of the fluoroplastic and treated to become more water-repellent contains more fluorine atoms than are Inherently present in the fluoroplastic in an untreated state.

4 more elements

A process for producing a recording head of an ink-jet printer comprising the steps of:

preparing an orifice plate at least one side of which is made of fluoroplastic;
treating said at least one side of said orifice plate made of the fluoroplastic to become more hydrophilic than a bulk material of said fluoroplastic itself;
attaching the other side of said orifice plate which is more hydrophilic than said bulk material of the fluoroplastic itself to a main body of said recording head having ink ejection devices and a device for driving said ink ejection devices;
forming on one side of said orifice plate made of the fluoroplastic a mask for masking regions of said orifice plate other than those corresponding to said ink ejection devices;
opening ink ejection orifices in said orifice plate at positions corresponding to said ink ejection devices by using said mask;
removing said mask;
and
implanting ions into a surface of said one side of said orifice plate made of the fluoroplastic so that said surface of said one side is treated to become more water-repellent than said bulk material of said fluoroplastic itself.

5 more elements

Dependencies are inferred from the claim text.

Recording head and process for producing the same

Life of this patent

Recording head and process for producing the same

Life of this patent

Abstract

Claims8