EP 0454133 A3 19930113 - THERMAL PRINT HEAD TRIMMING APPARATUS AND METHOD FOR TRIMMING RESISTANCE OF A THERMAL PRINT HEAD
Title (en)
THERMAL PRINT HEAD TRIMMING APPARATUS AND METHOD FOR TRIMMING RESISTANCE OF A THERMAL PRINT HEAD
Publication
Application
Priority
- JP 11387990 A 19900426
- JP 11388090 A 19900426
Abstract (en)
[origin: EP0454133A2] A thermal print head trimming apparatus trims the resistances of heating resistor elements (4a). The apparatus divides the measured resistance data into plural groups by their variation range, and applies pulse signal of high-voltage by a probe electrode (6) to the heating resistor elements (4a) in the plural groups except a group that includes the lowest resistance values of the heating resistor elements (4a). Thereby the whole resistances of the heating resistor elements (4a) in the thermal print head are trimmed to agree with the lowest resistance values. <IMAGE>
IPC 1-7
IPC 8 full level
B41J 2/345 (2006.01); H01C 17/26 (2006.01)
CPC (source: EP)
B41J 2/345 (2013.01); H01C 17/267 (2013.01)
Citation (search report)
- [X] US 4782202 A 19881101 - SAWAE TETSUNORI [JP], et al
- [A] DE 3616217 A1 19870423 - ANT NACHRICHTENTECH [DE]
- [X] EP 0342243 A1 19891123 - MATSUSHITA ELECTRIC IND CO LTD [JP]
- [A] PATENT ABSTRACTS OF JAPAN vol. 6, no. 220 (M-169)5 November 1982 & JP-A-57 125 066 ( MITSUBISHI DENKI ) 4 August 1982
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
DOCDB simple family (application)
EP 91106720 A 19910425