Support rollers for the print roller in a high-accuracy, wide-pa

Details Support rollers for the print roller in a high-accuracy, wide-pa Support rollers for the print roller in a high-accuracy, wide-pa

1989-06-22

1990-04-10

Reynolds, Bruce A.

Recorders

Thermal recording

400120, G01D 1510

Patent

active

049164635

ABSTRACT:
In a thermal printer for thermally printing on a wide media with a composite printhead comprising a plurality of standard thermal printheads and including a small diameter print roller for supporting the media adjacent the printhead, an improvement to improve print quality by preventing bowing of the print roller away from the printhead. In one embodiment, there is a first cylindrical support roller mounted parallel to the print roller in rolling contact therewith along the length thereof to oppose vertical movement or deformation of the print roller. In another embodiment, there is a second cylindrical support roller mounted parallel to the print roller in rolling contact therewith along the length thereof to oppose movement or deformation of the print roller relative to the printing surface with the first and second support rollers being disposed on opposite sides of a plane passing through the printhead and the print roller whereby the first and second support rollers together prevent bowing of the print roller with respect to the printing surface in both vertical and lateral directions.

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