Device for measuring the winding hardness of a strip, especially

Details Device for measuring the winding hardness of a strip, especially Device for measuring the winding hardness of a strip, especially

1985-06-17

1987-01-27

Levy, Stewart J.

Measuring and testing

Hardness

73159, G01N 300

Patent

active

046386572

ABSTRACT:
A device for measuring the winding hardness of a strip, especially a strip of paper, that has been wound into a reel. The device consists of a mechanism for extracting a slip that has been inserted tight between two coils of the reel of paper with one end extending out of the side of the reel and of a dynamometer that measures the force necessary to extract the slip over a certain distance. To allow winding hardness to be displayed directly rather than in the form of a graph, the slip-extracting mechanism operates at a constant extracting speed, a pulse generator that is supplied with the resulting force, or with a control signal derived from it, by the dynamometer supplies counting pulses to an up-down counter at a frequency that is proportional to the force, and the slip-extracting mechanism is connected to an odometer that, when it detects equal distances, switches the counter from up to down and stops it.

REFERENCES:
patent: 3385105 (1968-05-01), Smith
patent: 3540270 (1970-11-01), Wolfer

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