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This device provides a signal when a paper supply is down to the last few sheets in the case of a fan-fold supply 10 (Fig. 1) or the end of roll 12 in the case of a roll supply (Fig. 2).
English (United States)
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Low Paper Sense
This device provides a signal when a paper supply is down to the last few
sheets in the case of a fan-fold supply 10 (Fig. 1) or the end of roll 12 in the case
of a roll supply (Fig. 2).
Referring to Fig. 1, the device consists of a finely balanced sense arm 14
which rotates about a pivot 16. One end 18 of the arm extends under paper
supply 10, and the other end holds a magnet 20. When the paper supply is within
the last few sheets, arm 14 will rotate the position shown in phantom line and
magnet 20 will close a reed switch 22 which actuates a low paper indicator circuit
(not shown). A spring load may be added to increase the sensitivity of the
For the application of roll paper 12 (Fig. 2), the sense arm is so designed to
clear the paper core 24 at an appropriate diameter to indicate a need for
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