Method and apparatus for maintaining ribbon tension

Details Method and apparatus for maintaining ribbon tension Method and apparatus for maintaining ribbon tension

B - Operations, Transporting

41

J

B41J 33/40 (2006.01) B41J 3/407 (2006.01) B41J 29/38 (2006.01) B41J 33/44 (2006.01) B65C 11/02 (2006.01)

Patent

CA 2321770

A bi-directional handheld label printer (10) with a novel labeling media (22) and ink ribbon drive mechanism. A delay is introduced in the labeling media and ink ribbon (13) drive mechanism to pretension the ribbon prior to feeding labeling media and ribbon past the print head. When the drive motor (72) reverses direction, the drive roller (30) stalls momentarily while the take up ribbon drive spindle tensions the ribbon (13) in the desired direction.

La présente invention concerne une imprimante d'étiquettes bidirectionnelle portative (10) comprenant un nouveau mécanisme d'entraînement du support d'étiquetage (22) et du ruban encreur. On introduit un temps de retard dans le mécanisme d'entraînement du support d'étiquetage et du ruban encreur (13) afin de placer le ruban en prétension avant de faire avancer le support d'étiquetage et le ruban devant la tête d'impression. Lorsque le moteur d'entraînement inverse la marche, le rouleau d'entraînement se bloque momentanément tandis que l'axe de la bobine d'entraînement du ruban tend le ruban (13) dans la direction désirée.

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