| US 7,584,550 B2 | ||
| Apparatus and method for measuring waviness of sheet materials | ||
| Edgar Robert Campbell, Hartsville, S.C. (US); Robert Shean Cumbee, Hartsville, S.C. (US); and Jeffrey Thomas Moffat, Hartsville, S.C. (US) | ||
| Assigned to Sonoco Development, Inc., Hartsville, S.C. (US) | ||
| Filed on Dec. 27, 2006, as Appl. No. 11/616,393. | ||
| Prior Publication US 2008/0155850 A1, Jul. 03, 2008 | ||
| Int. Cl. G01B 5/00 (2006.01) | ||
| U.S. Cl. 33—806 [33/533] | 18 Claims |
| 1. An apparatus for measuring waviness of sheet materials, comprising:
a base having a horizontal planar upper surface for supporting a stack of sheets thereon;
a weight that rests freely atop an uppermost sheet of the stack; and
a measuring device for measuring a vertical distance between an upper datum plane corresponding to a top surface of the stack
and a lower datum plane corresponding to a lower surface of the stack, the vertical distance being indicative of a height
H of the stack.
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