X-Y plotter incorporating non-impact, liquid jet recording instrument
First Claim
1. A non-impact, liquid jet recording apparatus for use in an X-Y plotter of a type which comprises a support table adapted to support a recording medium thereon, an X-axis carriage mounted for parallel movement across said support table in the direction of the X-ordinate, a Y-axis carriage mounted on said X-axis carriage for movement in the direction of the Y-ordinate, a first drive unit for moving said X-axis carriage and a second drive unit for moving said Y-axis carriage, said apparatus comprising:
- a recording head rigidly carried by said Y-axis carriage and including a nozzle through which a liquid marking medium is jetted onto the recording medium, means for supplying said liquid marking medium to the exit of said nozzle, and an electrode member spaced from the exit of said nozzle and situated above said recording medium;
electrical means coupled to said electrode and said nozzle for applying a potential between said nozzle and said electrode member for establishing therebetween an electrostatic field required to attract said liquid marking medium from the exit of said nozzle; and
circuit means for controlling said electrical means to cause said electrical means to operate in such a manner as to jet said liquid marking medium in a varying amount substantially proportional to the recording velocity which is defined by the square root of the sum of the second powers of the velocities of movement of said carriages.
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Accused Products
Abstract
An X-Y plotter which effects non-impact recording by the application of a jet of liquid marking medium to a recording medium while the amount of liquid marking medium to be jetted towards the recording medium is controlled in accordance with the recording velocity. To this end, a signal generator is employed for generating an output signal in response to receipt of signals respectively indicative of the velocity of an X-axis carriage of the X-Y plotter and of the velocity a Y-axis carriage of the X-Y plotter. The output signal emerging from the signal generator indicates the recording velocity which is defined by the square root of the sum of the second power of the velocity of the X-axis carriage and that of the velocity of the Y-axis carriage. The amount of liquid marking medium to be jetted is controlled in response to the recording velocity so that the liquid marking medium can be jetted in an amount proportional to the recording velocity.
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Citations
19 Claims
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1. A non-impact, liquid jet recording apparatus for use in an X-Y plotter of a type which comprises a support table adapted to support a recording medium thereon, an X-axis carriage mounted for parallel movement across said support table in the direction of the X-ordinate, a Y-axis carriage mounted on said X-axis carriage for movement in the direction of the Y-ordinate, a first drive unit for moving said X-axis carriage and a second drive unit for moving said Y-axis carriage, said apparatus comprising:
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a recording head rigidly carried by said Y-axis carriage and including a nozzle through which a liquid marking medium is jetted onto the recording medium, means for supplying said liquid marking medium to the exit of said nozzle, and an electrode member spaced from the exit of said nozzle and situated above said recording medium; electrical means coupled to said electrode and said nozzle for applying a potential between said nozzle and said electrode member for establishing therebetween an electrostatic field required to attract said liquid marking medium from the exit of said nozzle; and circuit means for controlling said electrical means to cause said electrical means to operate in such a manner as to jet said liquid marking medium in a varying amount substantially proportional to the recording velocity which is defined by the square root of the sum of the second powers of the velocities of movement of said carriages. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A non-impact, liquid jet recording apparatus for use in an X-Y plotter of a type which comprises a support table adapted to support a recording medium thereon, an X-axis carriage mounted for parallel movement across said support table in the direction of the X-ordinate, a Y-axis carriage mounted on said X-axis carriage for movement in the direction of the Y-ordinate, a first drive unit for moving said X-axis carriage and a second drive unit for moving said Y-axis carriage, said apparatus comprising:
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a recording head rigidly carried by said Y-axis carriage and including a nozzle through which a liquid marking medium is jetted onto the recording medium, means for supplying said liquid marking medium at the exit of said nozzle, and an electrode member spaced from the exit of said nozzle and situated above said recording medium; potential applying means for applying a potential between said nozzle and said electrode member for establishing therebetween an electrostatic field required to attract said liquid marking medium from the exit of said nozzle towards said recording medium; circuit means operable upon receipt of first and second signals which are respectively fed from said first and second drive units representing the individual velocities of movement of said carriages to generate a control signal utilizable to control said potential applying means to cause said control signal to operate in such a manner as to jet said liquid marking medium in a varying amount substantially proportional to the recording velocity which is defined by the square root of the sum of the second powers of the velocities of movement of said carriages. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A non-impact, liquid jet recording apparatus for use in an X-Y plotter of a type which comprises a support table adapted to support a recording medium thereon, an X-axis carriage mounted for parallel movement across said support table in the direction of the X-ordinate, a Y-axis carriage mounted on said X-axis carriage for movement in the direction of the Y-ordinate, a first drive unit for moving said X-axis carriage and a second drive unit for moving said Y-axis carriage, said apparatus comprising:
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a recording head rigidly carried by said Y-axis carriage and including a nozzle through which a liquid marking medium is jetted onto the recording medium, means for supplying said liquid marking medium as the exit of said nozzle, and an electrode member situated above the recording medium in alignment with said nozzle and supported for movement close to and away from the exit of said nozzle; potential applying means for applying a potential between said nozzle and said electrode member for establishing therebetween an electrostatic field required to attract said liquid marking medium from the exit of said nozzle towards said recording medium; circuit means operable upon receipt of first and second signals which are respectively fed from said first and second drive units representing the individual velocities of movement of said carriages to generate a control signal; and means energizeable upon receipt of said control signal to move said electrode member in a proportional manner relative to the recording velocity which is defined by the square root of the sum of the second powers of the velocities of movement of said carriages. - View Dependent Claims (18, 19)
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Specification