Thermographic print head

Thermographic print heads have a layer giving protection against abrasion which is conventionally 10 to 15 mu m thick. According to the invention, the protective layer (6) consists of a rigid material with a much longer service life than the layers hitherto conventional. As a result, the layer thick...

Full description

Saved in:
Bibliographic Details
Main Authors SPRINGER,JOHANN,ER.NAT, RUSS,THOMAS
Format Patent
LanguageEnglish
German
Published 05.02.1987
Edition4
Subjects
CORRECTION OF TYPOGRAPHICAL ERRORS
i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME
LINING MACHINES
PERFORMING OPERATIONS
PRINTING
SELECTIVE PRINTING MECHANISMS
STAMPS
TRANSPORTING
TYPEWRITERS
Online AccessGet full text

Cover

More Information
Summary:Thermographic print heads have a layer giving protection against abrasion which is conventionally 10 to 15 mu m thick. According to the invention, the protective layer (6) consists of a rigid material with a much longer service life than the layers hitherto conventional. As a result, the layer thickness can be reduced to a fraction of the previous thickness. The protective layers are in many cases sensitive to temperatures above 400 DEG C. With the pulsed driving of the heating elements (9) over a predetermined duration which has hitherto been conventional, unnecessarily high peak temperatures arise. The pulsed driving is thus replaced by driving with a sequence of pulses, as a result of which the peak temperatures that have arisen hitherto are avoided.
Bibliography:Application Number: DE19853527040