Abrégé

The present invention relates to a method and a device for creating at least one temporary computer-controlled mask (4a) adapted to selectively transmit electromagnetic radiation, comprising the steps of providing a transparent plate (1) having two sides, wherein a capacitive layer (9, 10) is arranged on one of the sides of the transparent plate (1); providing a powder chamber (3) for storing powder particles (4) adapted to prohibit radiation impinging on a masking pattern (4a) formed by the powder particles (4) from reaching certain areas of a particulate build material (20); suspending at least some of the powder particles (4) in the powder chamber (3); depositing electrostatic charges (11) in or on the capacitive layer (9, 10) of the transparent plate (1); generating an electrostatic field in the powder chamber (3), so that at least some of the powder particles (4) become charged; and directly transferring the charged powder particles (4) to the transparent plate (1), thereby forming the masking pattern 4a.

Classes IPC  ?

• G03G 15/08 - Appareils pour procédés électrographiques utilisant un dessin de charge pour développer en utilisant un développateur solide, p. ex. développateur en poudre
• G03G 15/34 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes dans lesquels l'image de poudre est formée directement sur le matériau d'enregistrement
• B29C 67/00 - Techniques de façonnage non couvertes par les groupes , ou