Recording apparatus having a tapered roller platen for exerting

Details Recording apparatus having a tapered roller platen for exerting Recording apparatus having a tapered roller platen for exerting

1985-11-20

1988-03-01

Goldberg, E. A.

Recorders

Record receivers and/or driving means therefor

Web

400662, 226184, 346 76PH, G01D 1524

Patent

active

047289678

ABSTRACT:
A recording apparatus and, more particularly, a so-called thermal printer employs a thermal head as a recording head. A platen roller is in pressing engagement with the recording head and recording elements pass between the two. Biasing forces exerted on opposite ends of the recording head cause it to deform slightly. To accommodate for this deformation, the diameter of the platen roller is greater in the middle than at its opposite ends. This construction assures that both the recording head and the platen roller are pressed against each other under a uniform force, so that ink density irregularity on the recording paper, creasing of the recording paper and the ink sheet, and recording density irregularity resulting therefrom can be prevented, and thus stable recording performance can be assured.

REFERENCES:
patent: 3132788 (1964-05-01), Johnson
patent: 4463360 (1984-07-01), Kikuchi

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