End of ribbon indicator for a cassette
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United States of America Patent
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-
Sep 15, 1998
Grant Date -
N/A
app pub date -
Apr 14, 1997
filing date -
Apr 14, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cassette with an end of ribbon indicator or mark in accordance with the present invention includes a spool for storing the useable ribbon, a pair of end hubs, and at least one end of ribbon mark. One of the end hubs is connected to each end of the spool. Each of the end hubs has an inner surface facing the spool which includes the end of ribbon mark. The mark indicates how much usable ribbon is left on the spool. Preferably, the marks comprise a plurality of concentric rings centered around an axis extending along the length of the center of the spool.
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