Image reproducing system

Claim 2

An image reproducing system comprising means for producing an image signal including components representing the relative density of successive portions of an original carrying an image to be recorded on a recording medium in a plurality of scanning lines, means for emitting ink droplets of predetermined size from a nozzle in accordance with the operating period of a vibration imparting element mounted on said nozzle, means for producing a signal in synchronizm with the emission of said ink droplets from said nozzle, means for dividing the frequency of the signal produced in synchronism with the emission of said ink droplets thereby determining the maximum number of ink droplets to be emitted within the period of frequency division, means for converting the pulses appearing within said period of frequency division into pulses corresponding to the relative density of the successive portions of the image in response to the application of said image signal components and the output signal of said frequency dividing means, means for charging said ink droplets emitted from said nozzle on the basis of the output of said converting means, means for deflecting said charged ink droplets from the flying path depending on the charge carried by said ink droplets and means for varying the printing density of dots in the dot pitch on the same scanning line depending on the relative density of the successive portions of the original.

Claim 3

An image reproducing system as claimed in claim 1, further means comprising for varying the number of ink droplets to be applied in overlapping relation on the same scanning line depending on the relative density of the successive portions of the original.

Claim 4

An image reproducing system comprising means for producing a signal in synchronism with the emission of ink droplets from a nozzle, means for dividing the frequency of the output signal of said means, a compensating circuit for compensating the output signal of a photoelectric converter detecting the relative density of successive portions of an original carrying an image and generating a stepped waveform signal having the same frequency as that of the output signal of said frequency dividing means in response to the application of the signal produced in synchronism with the emission of said ink droplets, a converting circuit for slicing the output signal of said compensating circuit and converting the sliced signal into pulses representing the number of ink droplets to be applied to the range within the scanning line pitch or dot pitch, and means for combining the output of said converting circuit with a saw-tooth waveform signal synchronous with the output of said frequency dividing means to deliver an output signal used for charging said ink droplets.

Claim 5

An image reproducing system comprising means for producing a signal in synchronism with the emission of ink droplets from a nozzle, means for dividing the frequency of the output signal of said means, a compensating circuit for compensating the output signal of a photoelectric converter detecting the relative density of successive portions of an original carrying an image and generating a stepped waveform signal having the same frequency as that of the output signal of said frequency dividing means in response to the application of the signal produced in synchronism with the emission of said ink droplets, a converting circuit for slicing the output signal of said compensating circuit and converting the sliced signal into pulses representing the number of ink droplets to be applied to the range within the scanning line pitch or dot pitch, and means for combining the output of said converting circuit with a saw-tooth waveform signal synchronous with the output of said frequency dividing means to deliver an output signal used for charging said ink droplets.

Claim 6

An image reproducing system comprising means for producing an image signal including components representing the relative density of successive portions of an original carrying an image to be recorded on a recording body by means of a plurality of scanning lines, means for emitting ink droplets of predetermined size to form said scanning lines on the recording body from a nozzle in accordance with the operating period of a vibration imparting element mounted on said nozzle, means for producing a signal in synchronism with the emission of the ink droplets from said nozzle, means for dividing the frequency of the signal produced in synchronism with the emission of the ink droplets and producing a signal with a predetermined time-function in its amplitude having the period of The frequency division, means for combining said image signal with said time-function signal and producing a pulse signal having a width in accordance with said image signal, means for receiving said pulse signal and said signal produced in synchronism with the emission of the ink droplets and converting said pulse signal into a train of pulses the number of which is in accordance with the image signal, means for charging said ink droplets emitted from said nozzle on the basis of the output of said converting means, and means for deflecting said charged ink droplets from the flying path depending on the charge carried by said ink droplets.

Claim 7

An image reproducing system comprising means for producing an image signal including components representing the relative density of successive portions of an original carrying an image to be recorded on a recording body by means of a plurality of scanning lines, means for emitting ink droplets of predetermined size to form said scanning lines on the recording body from a nozzle in accordance with the operating period of a vibration imparting element mounted on said nozzle, means for producing a signal in synchronism with the emission of the ink droplets from said nozzle, means for dividing the frequency of the signal produced in synchronism with the emission of the ink droplets and producing a signal with a predetermined time-function in its amplitude having the period of The frequency division, means for combining said image signal with said time-function signal and producing a pulse signal having a width in accordance with said image signal, means for receiving said pulse signal and said signal produced in synchronism with the emission of the ink droplets and converting said pulse signal into a train of pulses the number of which is in accordance with the image signal, means for charging said ink droplets emitted from said nozzle on the basis of the output of said converting means, and means for deflecting said charged ink droplets from the flying path depending on the charge carried by said ink droplets.

Claim 8

An image reproducing system as claimed in claim 4, in which said train of pulses has a frequency such that the ink droplets on the same scanning line are printed in overlapping relation with each other.

Claim 9

An image reproducing system comprising means for producing an image signal including components representing the relative density of successive portions of an original carrying an image to be recorded, means for emitting ink droplets of predetermined size from a nozzle in accordance with the operating period of a vibration imparting element mounted on said nozzle, means for producing a signal in synchronism with the emission of the ink droplets from said nozzle, means for dividing the frequency of the signal produced in synchronism with the emission of the ink droplets and producing a signal with a predetermined time-function in its amplitude having the period of the frequency division, means for combining said image signal with said timefunction signal and producing a pulse signal having a width in accordance with said image signal, means for receiving said pulse signal and said signal produced in synchronism with the emission of the ink droplets and converting said pulse signal into a train of pulses the number of which is in accordance with the image signal, means for producing a signal increasing in its amplitude as time elapses having said period of the frequency division, means for combining said train of pulses with said increasing signal, means for charging said ink droplets emitted from said nozzle on the basis of an output of the last said combining means, and means for deflecting said charged ink droplets from the flying path depending on the charge carried by said ink droplets.

Claim 10

An image reproducing system comprising means for producing an image signal including components representing the relative density of successive portions of an original carrying an image to be recorded, means for emitting ink droplets of predetermined size from a nozzle in accordance with the operating period of a vibration imparting element mounted on said nozzle, means for producing a signal in synchronism with the emission of the ink droplets from said nozzle, means for dividing the frequency of the signal produced in synchronism with the emission of the ink droplets and producing a signal with a predetermined time-function in its amplitude having the period of the frequency division, means for combining said image signal with said timefunction signal and producing a pulse signal having a width in accordance with said image signal, means for receiving said pulse signal and said signal produced in synchronism with the emission of the ink droplets and converting said pulse signal into a train of pulses the number of which is in accordance with the image signal, means for producing a signal increasing in its amplitude as time elapses having said period of the frequency division, means for combining said train of pulses with said increasing signal, means for charging said ink droplets emitted from said nozzle on the basis of an output of the last said combining means, and means for deflecting said charged ink droplets from the flying path depending on the charge carried by said ink droplets.

Claim 11

An image reproducing system comprising means for producing an image signal including components corresponding to the relative density of successive portions of an original carrying an image to be recorded, means for emitting ink droplets of predetermined size from a nozzle in accordance with the operating period of a vibration imparting element mounted on said nozzle, means for producing a signal in synchronism with the emission of the ink droplets from said nozzle, means for dividing the frequency of the signal produced in synchronism with the emission of the ink droplets and producing a signal with a predetermined time-function in its amplitude having the period of the frequency division, means including a combining circuit and a slicing circuit for combining said image signal with said time-function signal and producing a train of pulses through slicing a signal resulting from said combining, the last said means further including a slice regulating circuit for producing an output having a frequency slightly different from the frequency of the emission of the ink droplets for regulation of said slicing, means for obtaining a logical product of said signal produced in synchronism with the emission of the ink droplets and said train of pulses to irregularly prevent production of a part of said train of pulses, means for charging said ink droplets emitted from said nozzle on the basis of the output of the last said means, and means for deflecting said charged ink droplets from the flying path depending on the charge carried by said ink droplets.

Claim 12

An image reproducing system comprising means for producing an image signal including components corresponding to the relative density of successive portions of an original carrying an image to be recorded, means for emitting ink droplets of predetermined size from a nozzle in accordance with the operating period of a vibration imparting element mounted on said nozzle, means for producing a signal in synchronism with the emission of the ink droplets from said nozzle, means for dividing the frequency of the signal produced in synchronism with the emission of the ink droplets and producing a signal with a predetermined time-function in its amplitude having the period of the frequency division, means including a combining circuit and a slicing circuit for combining said image signal with said time-function signal and producing a train of pulses through slicing a signal resulting from said combining, the last said means further including a slice regulating circuit for producing an output having a frequency slightly different from the frequency of the emission of the ink droplets for regulation of said slicing, means for obtaining a logical product of said signal produced in synchronism with the emission of the ink droplets and said train of pulses to irregularly prevent production of a part of said train of pulses, means for charging said ink droplets emitted from said nozzle on the basis of the output of the last said means, and means for deflecting said charged ink droplets from the flying path depending on the charge carried by said ink droplets.

Claim 13

An image reproducing system as claimed in claim 7, in which said slice regulating circuiT is connected to said slicing circuit and changes the slice level in accordance with the output thereof.

Claim 14

An image reproducing system as claimed in claim 7, in which said slice regulating circuit is connected to said combining means so that the output of said slice regulating circuit is superimposed on said signal resulting from said combining, and said slicing is carried out with a predetermined fixed slice level.

Claim 15

An image reproducing system comprising means for producing a signal in synchronism with the emission of ink droplets from a nozzle, means for dividing the frequency of the output signal of said means, a compensating circuit for compensating the output signal of a photoelectric converter detecting the relative density of successive portions of an original carrying an image and generating an output signal having the same frequency as that of the output signal of said frequency dividing means in response to the application of the signal produced in synchronism with the emission of said ink droplets, a converting circuit for slicing the output signal of said compensating circuit and converting the sliced signal into pulses representing the number of ink droplets to be applied to the range within the scanning line pitch or dot pitch, and means for combining the output of said converting circuit with a signal synchronous with the output of said frequency dividing means to deliver an output signal used for charging said ink droplets.

Claim 16

An image reproducing system comprising means for producing a signal in synchronism with the emission of ink droplets from a nozzle, means for dividing the frequency of the output signal of said means, a compensating circuit for compensating the output signal of a photoelectric converter detecting the relative density of successive portions of an original carrying an image and generating an output signal having the same frequency as that of the output signal of said frequency dividing means in response to the application of the signal produced in synchronism with the emission of said ink droplets, a converting circuit for slicing the output signal of said compensating circuit and converting the sliced signal into pulses representing the number of ink droplets to be applied to the range within the scanning line pitch or dot pitch, and means for combining the output of said converting circuit with a signal synchronous with the output of said frequency dividing means to deliver an output signal used for charging said ink droplets.