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US 4,727,379 AGranted
Accoustically soft ink jet nozzle assembly
AssigneeVidoejet Systems International, Inc.
InventorsGeorge Sourlis, Nikodem Zyznieuski, Robert I. Keur, Roger T. Slisz
Life of this patent
Estimating the term…
Abstract
An ink jet nozzle assembly is produced from materials, such as polyphenylene sulfide. The resulting assembly is acoustically soft so that undersirable fluid and mechanical resonances are substantially attenuated.
Claims16
A nozzle suitable for use with a transducer to form ink droplets comprising:
- a tubular member having an orifice at one end, the other end adapted for connection to a supply of ink containing solvents, said tubular member being formed from a material which is substantially impervious to said ink and which is acoustically soft,
- whereby when a transducer is coupled to said tubular member the disturbing energy thereof is transmitted to the ink within the tubular member without substantial amplification, attentuation or the creation of harmonic resonances of a frequency characterizing the disturbing energy.
A nozzle assembly to form ink droplets for an ink jet printer comprising:
- (a) a tubular member having an orifice at one end, the other end adapted for connection to a supply of ink containing solvents;
- (b) a transducer coupled to said nozzle for transmission of a disturbing energy through said tubular member to cause the ink to form droplets, as it leaves the orifice;
- (c) said tubular member being formed from a material which is substantially impervious to said ink and which is acoustically soft,
- whereby the disturbing energy is transmitted to the ink within the tubular member without substantial amplification, attentuation or creation of harmonic resonances of a frequency characterizing the disturbing energy.
1 more element
A nozzle suitable for use with a transducer to form ink droplets comprising:
- a tubular member having an orifice at one end, the other end adapted for connection to a supply of ink containing solvents, said tubular member being formed from a material which is substantially impervious to said ink and which has a substantially flat response to a driving voltage frequency characterizing the disturbing energy at least over the frequency range of 20 KHz to 70 KHz,
- whereby when the transducer is coupled to said tubular member the disturbing energy thereof is transmitted to the ink within the nozzle without substantial amplification, attentuation or creation of harmonic resonances of a frequency characterizing the disturbing energy.
A nozzle assembly to form ink droplets for an ink jet comprising:
- (a) a tubular member having an orifice at one end, the other end adapted for connection to a supply of ink containing solvents;
- (b) a transducer responsive to a driving signal for generating disturbing energy coupled to said tubular member to cause the ink to form droplets as it leaves the orifice;
- (c) said tubular member being formed from a material which is substantially impervious to said ink and which has a substantially flat response to the driving signal frequency at least over the frequency range of 20 KHz to 70 KHz,
- whereby the disturbing energy is transmitted to the ink within the tubular member without substantial amplification, attentuation or creation of harmonic resonances of one or more frequencies characterizing the disturbing energy.
1 more element
A nozzle suitable for use with a transducer to form ink droplets comprising:
- a tubular member having an orifice at one end, the other end adapted for connection to a supply of ink containing solvents, said nozzle being formed from a material which is:
- (a) resistant to said ink,
- (b) acoustically soft, and
- (c) has a substantially flat response to the driving signal frequency generating the disturbing energy at least over the range of 20 KHz to 70 KHz,
- whereby when a transducer is coupled to said tubular member the disturbing energy thereof is transmitted to the ink within the tubular member without substantial amplification, attentuation or creation of harmonic resonances of the driving signal frequency.
2 more elements
A nozzle suitable for use with a transducer to form ink droplets comprising:
- a hollow chamber connected to a supply of ink containing solvents, adapted to confine a volume of said ink to be ejected through an orifice in a wall thereof, said chamber being formed from an acoustically soft material which is substantially resistant to said ink,
- whereby when a transducer is coupled to said chamber the disturbing energy thereof is transmitted to the ink within the chamber without substantial amplification, attenuation or the creation of harmonic resonances of one or more frequencies characterizing the disturbing energy.
A method of forming ink droplets from a supply of ink comprising the steps of:
- supplying the ink to a chamber, the walls of which are formed of acoustically soft material and which have at least one outlet therefrom through which ink may pass;
- creating a disturbing energy characterized by one or more predetermined frequencies;
- transmitting said energy to said ink through said acoustically soft chamber walls to form droplets as the ink passes out of the chamber;
- whereby the disturbing energy is transmitted to the ink without substantial amplification, attenuation or the creation of harmonic resonances of said one or more frequencies characterizing said disturbing energy.
1 more element
Dependencies are inferred from the claim text.