Apparatus for testing the stiffness of a sheet

Details Apparatus for testing the stiffness of a sheet Apparatus for testing the stiffness of a sheet

1991-10-30

1993-04-13

Skaggs, H. Grant

Classifying, separating, and assorting solids

Sorting special items, and certain methods and apparatus for...

Sorting paper money

271188, 271209, 73159, 209599, B07C 500

Patent

active

052014240

ABSTRACT:
An apparatus for testing the stiffness of a sheet, such as a currency note, includes first cooperating rollers (36, 38) and second cooperating rollers (28, 32) arranged to urge the sheet along a feed path (48) The first rollers (36, 38) engage frictionally with the sheet and are caused to rotate with a greater peripheral speed than the second rollers (28, 32). As a result, there is a tendency for the first rollers (36, 38) to cause that portion of the sheet between the first and second rollers (36, 38; 28, 32) to buckle, this tendency being resisted if the sheet has a required degree of stiffness. First and second sensors (66, 68) are disposed on opposite sides of said feed path (48) for sensing a deflection of said portion of said sheet away from the feed path (48) by at least a predetermined amount, brought about by buckling of the sheet due to the sheet being insufficiently stiff.

REFERENCES:
patent: 3067999 (1962-12-01), Skeen
patent: 3202778 (1965-08-01), Fliegner et al.
patent: 3552563 (1971-01-01), Smith
patent: 3863913 (1975-02-01), Hirafuji
patent: 3966198 (1976-06-01), Komada et al.
patent: 4501642 (1985-02-01), Wells
patent: 4687106 (1987-08-01), Prins
patent: 4703097 (1972-11-01), Kilpatrich et al.
patent: 5029469 (1991-07-01), Chase et al.
patent: 5101661 (1992-04-01), Cresson et al.

Affiliated with

Also associated with

Rating

Apparatus for testing the stiffness of a sheet does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for testing the stiffness of a sheet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for testing the stiffness of a sheet will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1149634