Winding – tensioning – or guiding – Unwinding – With detector – indicator – or control
Patent
1999-11-02
2000-10-24
Jillions, John M.
Winding, tensioning, or guiding
Unwinding
With detector, indicator, or control
2425632, 2425951, 116 67A, B65H 1602, B65H 2608
Patent
active
061353841
ABSTRACT:
A device has a pivoted lever for detecting a near end state of a roll of paper, and the lever is held at a first position by the weight of a roll of paper, but is resiliently biased toward a second position by a spring. When the roll of paper does not have a core, and when the weight thereof falls to a predetermined value, the lever is moved from the first position to the second position due to a resilient force of the spring. When the roll of paper has a core, and when a diameter thereof is reduced to a predetermined value, the lever receives the roll of paper in a recess formed therein, and is moved from the first position to the second position due to a resilient force of the spring. When the lever is moved to the second position, this is detected by a suitable detecting element. Thus, the detector can detect the near end state of the roll of paper without regard to whether the roll of paper has a core or not.
REFERENCES:
patent: 3972487 (1976-08-01), Costa
patent: 4204180 (1980-05-01), Usui et al.
patent: 4447957 (1984-05-01), Cavazza
patent: 5060877 (1991-10-01), Bullivant
patent: 5367746 (1994-11-01), Clement et al.
Skelly Eamon
Yoshida Kohichi
Fujitsu Isotec Limited
Jillions John M.
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