DISPOSITIF DE COMMANDE DU RETOUR SUR UNE POSITION D'IMPRESSION PREDETERMINEE POUR MACHINE A ECRIRE ELECTRONIQUE

Machine à écrire à élément d'impression unique pouvant être ramené sur une position d'impression quelconque désirée de la ligne d'impression. La machine à écrire 10 selon l'invention permet à l'opérateur d'aligner l'élément d'impression 21 porté par le chariot 13 avec un caractère quelconque sur une ligne, en plaçant d'abord un repère 8 de l'écran 11 dans une relation prédéterminée par rapport au caractère sur lequel il veut revenir, puis en commandant depuis le clavier 12, le déplacement du chariot afin d'obtenir l'alignement précis. On electronic typewriters which have the ability to record into a small working memory those characters, functions and escapements which are keyed at the keyboard, it is many times advantageous to be able to place the carrier and the print point over a character which has been previously typed without using repeated backspaces. Disclosed herein is a feature for an electronic typewriter which permits the operator to easily align the print point with a character on the page by positioning a reference mark on the card holder or print carrier in relation to a previously printed character and then through keyboard control cause the carriage to shift its position such that the print point is then exactly aligned with the character printed. The positioning of the carrier such that the reference mark is in relation to the desired print point is accomplished by a backspace operation and the repositioning or causing of the carrier to assume a position immediately over the subject character is accomplished by keyboard control through the electronics of the typewriter to cause the carrier to shift a predetermined distance.