Recorders – Thermal recording
Patent
1992-09-24
1994-04-05
Fuller, Benjamin R.
Recorders
Thermal recording
400234, B41J 3336
Patent
active
053009533
ABSTRACT:
An improved thermal printing postage meter includes a base supporting a registration wall and a deck. A thermal print head is fixably mounted to the registration wall above a portion of the deck to define a print station. A thermal ribbon cassette is detachably mounted to the registration wall, the thermal ribbon cassette having a thermal transfer ribbon supply mounted around a supply roller and threaded past the print head in the printing station to a take-up roller. A platen roller assembly supports a platen roller for positioning the platen roller to assume a second position biasing the media against the thermal ribbon and the thermal print head. A first motor drive is provided for rotatively driving the platen roller, wherein rotation of the platen roller simultaneously drives the media and thermal ribbon past the print head. A second motor drive is provided for driving the take-up roller during a print cycle. A microcontroller communicates with the first drive motor and the second drive motor for driving the first and second motor drives at complementary speeds such that the take-up side web tension of the thermal ribbon within the thermal cassette remains constant.
REFERENCES:
patent: 4739343 (1988-04-01), Dolan
patent: 4746234 (1988-05-01), Harry
Fuller Benjamin R.
Parks, Jr. Charles G.
Pitney Bowes Inc.
Scolnick Melvin J.
Tran Huan
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