Mechanism for preventing slack in printer carbon ribbon
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United States of America Patent
Stats
-
Mar 29, 1994
Grant Date -
N/A
app pub date -
Apr 15, 1993
filing date -
Apr 27, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A mechanism for preventing slack in a printer carbon ribbon includes a reverse rotation mechanism for applying a rotational force to the carbon ribbon feed shaft in the reverse direction from that for feeding the carbon ribbon irrespective of the direction in which a label strip or other printable medium is being fed. The reverse rotation mechanism comprises a first reverse rotation sub-mechanism for applying a rotational force to the carbon ribbon feed shaft in the reverse direction from that for feeding the carbon ribbon when the printable medium is being fed in the forward direction and a second reverse rotation sub-mechanism for applying a rotational force to the carbon ribbon feed shaft in the reverse direction from that for feeding the carbon ribbon when the printable medium is being retracted in the reverse direction. The mechanism is particularly applicable where a drive motor is used both to move the printable medium and to take up the printer carbon ribbon. If the direction of the drive motor is reversed to move the printable medium in a reverse direction, the printer carbon ribbon will thus not be provided with slack.
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