Method for controlling the heating elements of a thermal print head

US6731318B2 · kind B2 · utility

Assignee

• SKIDATA GmbH · AT

Inventors

• Roland Aigner · Salzburg, AT
• Walter Lechner · Linz, AT

Key dates

• Filing date: Oct 25, 2001
• Grant date: May 4, 2004
• Expiry date: Oct 25, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41J2/355
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

For recording and erasure of data on a reversibly writable thermal recording material (5) with a thermal print head (2), the heating elements (8) of the thermal print head for recording are subjected to an energy pulse (W) which causes the recording material to be heated to a temperature (T1) at which it assumes a colored and/or opaque state. For erasure subsequent to the recording pulse (W), the heating elements (8) are subjected to an energy pulse train (E1).