EP 1247654 A1 20021009 - Method for calibrating a thermal printer
Title (en)
Method for calibrating a thermal printer
Title (de)
Verfahren zur Eichung eines Thermodruckers
Title (fr)
Procédé pour calibrer une imprimante thermique
Publication
Application
Priority
EP 01000107 A 20010405
Abstract (en)
A thermal printer is calibrated by supplying a thermographic material, printer data, and default reference values; printing a calibration pattern for the printer data; measuring a density Dexpi for each patch of a density wedge of the pattern; calculating a corresponding value Prefnewj for a reference printing power; and calculating a corresponding density Di. Calibration of a thermal printer having a thermal head incorporating energizable heating elements, includes supplying to the thermal printer a thermographic material m, printer data Pi each intended to be recorded as a pixel having a density Di, and default reference values for printing parameters pi comprising a value Pref for a reference printing power; printing a calibration pattern for the printer data, where the calibration pattern comprises a step density wedge such that a whole range of a relation Di(Pi) between the printer data and the density is covered; measuring a density Dexpi for each patch of the density wedge of the calibration pattern in relation to the printer data, and storing a first set S1 = (Pref, Pi, Dexpi) in a first memory M1; calculating, for a desired density Dwantj, a corresponding value Prefnewj for the reference printing power, and storing a second set S2 = (Dwantj, Prefnewj) in a second memory M2; and calculating, for the desired density Dwantj and for each printer data, a corresponding density Di and storing a third set S3 = (Dwantj, Prefnewj, Pi, Di) in a third memory M3. Independent claims are included for the following: (a) A method of thermal recording by using a thermal head incorporating the energizable heating elements, and using the above calibration method;and (b) An apparatus for thermal recording an image on a thermographic material using the above method.
IPC 1-7
IPC 8 full level
B41J 2/32 (2006.01); B41J 2/35 (2006.01); B41J 2/36 (2006.01); B41J 29/393 (2006.01)
CPC (source: EP)
B41J 2/36 (2013.01); B41J 29/393 (2013.01)
Citation (applicant)
EP 1000003 A1 20000517 - SHELL INT RESEARCH [NL]
Citation (search report)
- [X] EP 0453714 A1 19911030 - MITSUBISHI ELECTRIC CORP [JP]
- [X] US 5528270 A 19960618 - TAJIKA HIROSHI [JP], et al
- [A] US 5378563 A 19950103 - ITO WATARU [JP]
- [A] PATENT ABSTRACTS OF JAPAN vol. 1999, no. 12 29 October 1999 (1999-10-29)
- [A] PATENT ABSTRACTS OF JAPAN vol. 2000, no. 20 10 July 2001 (2001-07-10)
- [A] PATENT ABSTRACTS OF JAPAN vol. 2000, no. 21 3 August 2001 (2001-08-03)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1247654 A1 20021009; EP 1247654 B1 20060712; DE 60121421 D1 20060824; DE 60121421 T2 20070111; JP 2002331699 A 20021119
DOCDB simple family (application)
EP 01000107 A 20010405; DE 60121421 T 20010405; JP 2002099727 A 20020402