Non-destructive hardness testing of articles such as cigarettes

Details Non-destructive hardness testing of articles such as cigarettes Non-destructive hardness testing of articles such as cigarettes

1974-06-10

1976-05-11

Gill, James J.

Measuring and testing

Hardness

73 375, 73 94, G01N 310, G01B 1308

Patent

active

039554066

ABSTRACT:
Apparatus for the non-destructive hardness testing of an article such as a cigarette. The article is placed in an elastic sleeve and surrounded by a liquid, the level of which may be determined through a gauge tube. The interior of the article is then subjected to two different reduced pressures and the resulting volumetric change of the article is determined from the gauge tube at each reduced pressure. The hardness of the article is then calculated by means of a suitable formula.

REFERENCES:
patent: 1796489 (1931-03-01), Sturcke
patent: 2550701 (1951-05-01), Lardy
patent: 2821851 (1958-02-01), Daley
patent: 2970041 (1961-01-01), Burlis et al.
patent: 3115772 (1963-12-01), O'Keefee et al.
patent: 3182497 (1965-05-01), Rubens et al.
patent: 3668928 (1972-06-01), Strydom

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