Siemens Aktiengesellschaft

Siegfried Wiesmuller

Helmut Kraus

A liquid jet recorder which includes at least one jet nozzle which is connected to a pressure medium conduit for the ejection of an electrically-conductive recording liquid onto a recording carrier, and which includes at least one control electrode connected to a signal source for modulation of the liquid jet in the context of carrying out spot or point wise recording. The liquid jet recorder of the above-mentioned type, which in a simple manner facilitates that the intensity of a recording color may be controlled within a predetermined range of accuracy. The signal source comprises a number of impulse generators which correspond to the number of desired color steps for each image point, whose impulse sequences are in synchronism, which possess equal impulse amplitudes and may be differentiated from each other with respect to the sensing relationship of the color steps; and including means for connecting the required impulse generator required for the recording of a desired color step on an image point to the associated electrode, while providing an identical recording time for all image points.

Liquid jet recorder

A liquid jet recorder including at least one nozzle which is connected to a pressure medium conduit for ejection of an electrically-conductive recording liquid onto a recording carrier, with at least one control electrode connected to a signal source for modulation of the liquid jet, and means for generating a relative motion between the nozzle and the recording carrier in two mutually perpendicular directions in the context of providing a linewise image recording. The recorder includes a pulse generator which is actuatable in synchronism with the relative movement between the nozzle and the recording carrier through displacement means for at least one of these components, and which transmits line and image point impulses to an image storage for an image distribution in image lines and image points, in which the image point information is stored in correspondence with the image distribution, and in which the image storage may be interrogated through the line and image point impulses for the stepwise further transmission of the image point information to a signal source.

A liquid jet recorder having at least one jet nozzle which is connected to a pressure means conduit for the ejection of an electrically-conductive recording liquid onto a recording carrier; having at least one control electrode encompassing the liquid jet which is disintegrating into drops, which is formed of porous material which communicates with a suction conduit for the recording liquid; and a signal source adapted to be switched between the control electrode and the liquid jet for charging of the drops so that the latter mutually repel each other and disintegrate into a vapor cloud adapted to be aspirated into the control electrode. The recorder includes a suction pump, including circuitry which will activate the suction pump prior to the commencement of a recording. In the liquid jet recorder, any possible residues of the recording liquid adhering to the control electrode are aspirated prior to commencement of a recording. Thus, any dirtying of the recording carrier by means of such residues is no longer possible. Delay means may be provided in the novel circuitry whereby, after completion of a recording sequence, the residues of the recording liquid on the control electrode are collected so as to prevent the dirtying of the recording carrier.

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Siegfried Wiesmuller