Method and apparatus for determining at least one sheet stretch

Details Method and apparatus for determining at least one sheet stretch Method and apparatus for determining at least one sheet stretch

1994-10-06

1997-05-13

Dougherty, Elizabeth L.

Measuring and testing

Sheet, woven fabric or fiber

73862392, G01L 504

Patent

active

056282273

ABSTRACT:
There are provided a method and an apparatus for determining at least one sheet stretch value of a roll of material. The method comprises the steps of (a) radially marking one side end of the roll from periphery thereof to produce a series of aligned marks along a radius thereof; (b) supporting the roll in such a manner that it is free to rotate, thus allowing relaxation of peripheral layers thereof; and (c) after steps (a) and (b), measuring a lateral shifting value GAP of one of the marks, which is the outermost in periphery of the roll, with respect to an adjacent mark.

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