Flexographic or typographical stereotype prodn. - involves electrostatic charged image formed on thermoplastics sheet heated and submitted to HF electric field

摘要

The fabrication of the type is in three stages. In the first stage a latent image is formed. The image is made up of electrostatic charges of the motif to be reproduced on a thermoplastic element. This element is homogeneously heated and submitted to a high frequency electric field until it softens and deforms to develop the latent image under the action of the electrostatic forces generated by the charges. The thermoplastic element is then left to cool, and thus an element is produced which has a motif in relief.