Array Printers Publ. Ab

Arrray Printers Ab

Agneta Sandberg

Bengt Bern

An image printing device and method for printing an image to an information carrier. The image printing device includes apertures which can be selectively opened or closed to permit or restrict the transport of pigment particles during print sequences, a predetermined number of which print sequences are included in a print cycle, to thereby enable the formation of a pigment image. Further, deflection electrodes are included for, by means of predetermined deflection voltages related to each one of the predetermined number of print sequences, controlling the deflection of pigment particles in transport to thereby be able to deflect pigment particles against predetermined locations in view of the image which is to be printed. To enable a faster print speed, according to the invention, the change of the predetermined deflection voltages of a previous print sequence to the predetermined deflection voltages of a current print sequence is time displaced relative to the beginning of the current print sequence.

Direct electrostatic printing method and apparatus with increased print speed

A direct electrostatic printing device for printing an image onto an image receiving substrate includes a toner carrier having a plurality of charged toner particles thereon. A toner delivery unit conveys the charged toner particles to the toner carrier. The toner delivery unit further includes a voltage source and a transfer member connected to the voltage source. The voltage source produces an electrical potential difference between the transfer member and the toner carrier to cause toner particles having a predetermined charge polarity to be attracted from the transfer member to the toner carrier. A printhead structure has an electric field pattern generated on it which is defined by an image to be printed. The printhead structure selectively controls transport of charged toner particles from the toner carrier onto the image receiving substrate.

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Göteborg, Sweden

Agneta Sandberg