Roll paper transportation device and printing apparatus

Winding – tensioning – or guiding – Unwinding – With detector – indicator – or control

Reexamination Certificate

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C242S566000, C242S413300

Reexamination Certificate

active

07984871

ABSTRACT:
A printing apparatus and a roll paper transportation device which reduces the space needed to accommodate a roll paper buffer mechanism unit and paper detection unit, and to reduce poor electrical contact in the contact part of the paper detection unit. The roll paper transportation device has a paper detection unit8for detecting the presence of roll paper5, and a buffer mechanism unit7for absorbing variation in roll paper tension in order to keep the roll paper5tension less than or equal to a predetermined level. The buffer mechanism unit7forms a housing unit16for housing at least part of the paper detection unit8in a common area disposed in the buffer mechanism unit7enabling the paper detection unit8and buffer unit7to operate in unison without interfering with the operation of the other.

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Ref A6/61231 EP 06007827.6-1256 European Patent Office Jul. 23, 2007.

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