Method of proof testing glass

Details Method of proof testing glass Method of proof testing glass

2008-01-22

2008-01-22

Douglas, Steven O. (Department: 3771)

Fluent material handling, with receiver or receiver coacting mea

With testing or weighing receiver content

C073S037000, C073S052000

Reexamination Certificate

active

11743055

ABSTRACT:
A method of proof testing glass containers is disclosed. The method involves applying pressure to a sealed container in two discrete stages as shown inFIG. 1. In the first stage, the pressure is increased to a peak over at a first rate. In the second stage, the pressure is reduced to zero at a much greater rate.

REFERENCES:
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patent: 3230760 (1966-01-01), Fryer, Jr.
patent: 3251218 (1966-05-01), Russel
patent: 3955402 (1976-05-01), Harvill
patent: 4291573 (1981-09-01), Richter et al.
patent: 4916936 (1990-04-01), Wilson
patent: 7231945 (2007-06-01), King et al.

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