Claims
- 1. .�.A.!. .Iadd.In a continuous jet printer of the type which produces a continuous stream of ink droplets which are projected toward a substrate and are selectively electrically charged and deflected to mark the substrate, the improvement comprising:
- a. a transducer producing a disturbing energy at a frequency within the range of approximately 10 KHz to 100 KHz;
- b. a .Iaddend.nozzle suitable for use with .�.a.!. .Iadd.said .Iaddend.transducer to form .Iadd.said continuous stream of .Iaddend.ink droplets comprising.�.:.!. a tubular member .Iadd.for coupling the disturbing energy to the ink said member .Iaddend.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 .Iadd.Ryton .Iaddend.a material which is substantially impervious to said .�.ink and which.!. .Iadd.ink, .Iaddend.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.!. .Iadd.and has a substantially constant response to the disturbing energy over said frequency range to minimize .Iaddend.amplification, attentuation or the creation of harmonic resonances of a frequency characterizing the disturbing energy.
- 2. The nozzle according to claim 1 wherein said tubular member is molded as a single piece .�.from a material selected from the group comprising: Celcon, Delrin, Ryton.!.. .�.3. The nozzle according to claim 1 wherein the nozzle has a substantially flat response to the driving voltage frequency generating the disturbing energy over the range of approximately
- 10 KHz to 100 KHz..!.4. .�.A.!. .Iadd.In a continuous jet printer of the type which produces a continuous stream of ink droplets which are projected toward a substrate and are selectively electrically charged and deflected to mark the substrate, the improvement comprising:
- a .Iaddend.nozzle assembly to form .Iadd.a continuous stream of .Iaddend.ink droplets for an ink jet printer comprising:
- .Iadd.a. transducer producing a disturbing energy at a frequency within the range of approximately 10 KHz to 100 KHz; .Iaddend.
- .�.(a).!. .Iadd.b. .Iaddend.a tubular member having an orifice at one end, the other end adapted for connection to a supply of ink containing solvents.�.;.!. .Iadd.for coupling said .�.(b) a transducer coupled to said nozzle for transmission of a.!. disturbing energy .�.through said tubular member to cause the ink.!. .Iadd.to the ink .Iaddend.to form droplets, as it leaves the orifice;
- .�.(c).!. .Iadd.c. .Iaddend.said tubular member being formed from .Iadd.Ryton .Iaddend.a material which is substantially impervious to said ink .�.and which.!. .Iadd.ink, .Iaddend.is acoustically soft,
- .�.whereby the disturbing energy is transmitted to the ink within the tubular member without substantial.!. .Iadd.and has a substantially constant response to the disturbing energy over said frequency range to minimize .Iaddend.amplification, attentuation or creation of harmonic
- resonances of a frequency characterizing the disturbing energy. 5. The nozzle according to claim 4 wherein said transducer is mounted on said tubular member and coupled thereto by adhesive bonding with a bonding agent which is relatively stiff to insure efficient coupling of the
- disturbing energy to the tubular member. 6. The nozzle according to claim
- 5 wherein said bonding agent is an anaerobic adhesive. .�.7. 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 substantially amplification, attentuation or creation of harmonic resonances of a frequency characterizing the disturbing energy..!..�.8. The nozzle according to claim 7 wherein said tubular member is molded as a single piece from a material selected from the group comprising: Celcon, Delrin, Ryton polymers.!..�.9. The nozzle according to claim 7 wherein said tubular member is molded as a single piece from Ryton and the response to the transducer disturbing frequency is substantially flat over the frequency range of 10 KHz to 100 KHz..!..�.10. A nozzle assembly to form ink droplet 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 distributing 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..!..�.11. The nozzle according to claim 10 wherein said transducer is coupled to said tubular member by adhesive bonding with a bonding agent which is relatively stiff to insure efficient coupling of the disturbing energy to the tabular member..!..�.12. The nozzle according
- to claim 10 wherein said bonding agent is an anaerobic adhesive..!..�.13. 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..!..�.14. The nozzle according to claim 13 wherein said tubular member is molded as a single piece from Ryton and the response to the transducer driving signal is substantially flat over the frequency range of 10 KHz to 100 KHz..!..�.15. 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..!..�.16. 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 substantially amplification, attenuation or the creation of harmonic resonances of said one or more frequencies characterizing said disturbing energy..!.
Parent Case Info
.Iadd.This application is a continuation of Ser. No. 07/843,596, filed Feb. 28, 1992, now abandoned, which in turn is a reissue application of Ser. No. 06/883,707, filed Jul. 9, 1986, U.S. Pat. No. 4,727,379. .Iaddend.
US Referenced Citations (35)
Foreign Referenced Citations (1)
Number |
Date |
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53-123458 |
Oct 1978 |
JPX |
Continuations (1)
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Number |
Date |
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Parent |
843596 |
Feb 1992 |
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Reissues (1)
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Number |
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883707 |
Jul 1986 |
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