Method and apparatus for testing the tightness of foil bags

Details Method and apparatus for testing the tightness of foil bags Method and apparatus for testing the tightness of foil bags

1994-12-22

1996-04-16

Williams, Hezron E.

Measuring and testing

With fluid pressure

Leakage

73 52, 73 41, G01M 336

Patent

active

055071775

ABSTRACT:
Disclosed are a method and apparatus for testing the tightness of foil bags (10). In order to test the tightness of foil bags (10), mechanical testing members are used which act upon the foil bag (10) in the region of a cavity (15) formed above the packaged goods. Testing rams (18) are pushed against a bag wall (16, 17) with a given testing pressure. The depth of impression is indicative of the airtightness of the foil bag ( 10). The size of the cavity (15) which can be used for testing is reduced by clamping members (26) and, as a result, a residual cavity (25) is formed next to the clamping members (26). Consequently, an increased pressure is present within the residiual cavity, that is to say within the foil bag (10), which facilitates testing.

REFERENCES:
patent: 3918293 (1975-11-01), Feigel
patent: 4024956 (1977-05-01), Cassidy
patent: 4510730 (1985-04-01), Edmondson
patent: 4517827 (1985-05-01), Tapscott
patent: 4955226 (1990-09-01), Beaty et al.
JP 3-14435 A. Patents Abstracts of Japan, M-1098, Mar. 28, 1991, vol. 15, No. 129.

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