Measurement of the stiffness of packet blank creases

Details Measurement of the stiffness of packet blank creases Measurement of the stiffness of packet blank creases

1986-11-06

1988-06-28

Levy, Stewart J.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

G01N 320

Patent

active

047531134

ABSTRACT:
Apparatus for measuring the stiffness of creases of a packet blank comprises first and second spaced apart guides, on which a flat blank may be supported, and a plunger which is movable between the guides to deform the blank about a crease(s). The plunger brings part of the blank into contact with a bearing surface, and a panel(s) bent relatively of that part rests against force measuring means. The force measuring means provides a signal indicative of the resistance to bending of a crease about which the panel(s) has been bent.

REFERENCES:
patent: 1200086 (1916-10-01), Cruser
patent: 2338338 (1944-01-01), Kieckhefer
patent: 2482470 (1949-09-01), Waard et al.
patent: 4046001 (1977-09-01), Maeda et al.
patent: 4358962 (1982-11-01), Ashby et al.
patent: 4578052 (1986-03-01), Engel et al.

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