Machine for typing characters

US4320980A · kind A · utility

Assignee

• Ing. C. Olivetti & C., S.p.A. · IT

Inventors

• Gian V. Mia · Feletto, IT
• Mario Figini · Novi Ligure, IT

Key dates

• Filing date: Feb 6, 1980
• Grant date: Mar 23, 1982
• Expiry date: Feb 6, 2000

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41J1/24
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Characters are typed in reverse, i.e. light characters on a dark background by first typing all over the field of the character using an ink ribbon, back spacing and typing the character using a correcting ribbon. The first typing may be effected with a solid character covering the whole field in one or a few operations but, in the preferred embodiment is effected by repeatedly typing a vertical bar with tiny line feed increments, say 1/120". The first typing may take place on depression of a special key, which also effects the back spacing and the correcting ribbon; the character key is then struck. Preferably the whole sequence takes place automatically upon depression of the character key while a mode selector is in REVERSE mode.