| 摘要 |
An improved thermal printing apparatus having a frame for supporting an elongate thermal print head extending opposite to an elongate print roller. The thermal print head being responsive to a microcontroller for printing on an article positioned between the thermal print head and the print roller. The improvement comprises: a drive housing pivotally mounted to the frame, the print roller rotatively mounted to the drive housing, an eject rollerrotatively mounted to the drive housing parallel to the print roller, backing means located opposite the eject roller, means responsive to said microcontroller for causing said drive housing to pivotally displace to a first position biasing the print roller in the direction of the thermal print head andagainst the article for printing, and for causing the drive housing to pivotallydisplace to a second position biasing the eject roller in the direction of the backing means and against the article when the microcontroller has completed printing. The thermal printing apparatus further comprising compensation means for causing the print roller to displace perpendicular to the thermal print head in response to the thickness of said article while maintaining the biasing force on the article.
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