Device for detecting near end state of roll of paper

Details Device for detecting near end state of roll of paper Device for detecting near end state of roll of paper

1994-08-31

2000-02-15

Jillions, John M.

Winding, tensioning, or guiding

Unwinding

With detector, indicator, or control

2425632, 2425951, 116 67A, B65H 2608, B65H 1602

Patent

active

060243228

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.
Patent Abstracts of Japan, vol. 10, No. 304 (M-526) Oct. 16, 1986 & JP-A-61 116573 (Tokyo Electric Co. Ltd.) Jun. 4, 1986.

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