printer for printing desired characters on manually introduced documents, such as travel and transport documents, invoices or drgl., movement of the documents

摘要

A printer for typing desired characters (10) on manually entered documents (4), such as travel and transport documents, invoices, etc., while in movement. The printer comprises a printing head (2) which does not move with respect to a printer support (1) and is associated with a decoder (5) for reading the speed of advancement of the document (4) with respect to itself. The printing head (2) is mounted on support (1) against which pressing means (7) act and on which a sensor (3) is mounted to verify the presence, direction of advancement and correct position of the document (4). Electronic control means connected to the decoder (5) and the sensor (3) are provided in order to operate the printing head (2) in correlation to the speed at which the document (4) advances in a slot (6) parallel to at least one line of characters.