US PATENT SUBCLASS 72 / 18.4
.~.~.~ Sensing slack or tension (e.g., by use of dancer)

Current as of: June, 1999
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72 /   HD   METAL DEFORMING

6.1  DF  WITH USE OF CONTROL MEANS ENERGIZED IN RESPONSE TO ACTIVATOR STIMULATED BY CONDITION SENSOR {7}
17.3  DF  .~ Sensing work or product (e.g., by X-ray) {6}
18.1  DF  .~.~ Including plural sensors or sensor responsive to plural conditions {6}
18.4.~.~.~ Sensing slack or tension (e.g., by use of dancer)

DEFINITION

Classification: 72/18.4

Sensing slack or tension (e.g., by use of dancer):

(under subclass 18.1) Subject matter including (a) detecting the lateral movement of a flexible portion of an elongated workpiece or (b) detecting the degree of tautness in an elongated workpiece.

(1) Note. A typical disclosure found in this subclass comprises a system including two deforming mills through which the work passes sequentially. In the space between the mills, the work is engaged by a detecting means urged against

the work along a line substantially at right angles to the direction of work movement. The position of said means along that line indicates the tautness of the work passing between the mills, and this position is used to control the tautness.

SEE OR SEARCH THIS CLASS, SUBCLASS:

8.6+, 11.4, 12.3, 16.6, and 19.2, for other sensing of slack or tension in work or product.

SEE OR SEARCH CLASS

226, Advancing Material of Indeterminate Length,

44, for a "dancer" controlling feed of material, and see (4) Note under the definition of Class 72, subclass 6.1.