초록 ▼

An apparatus for testing the sealing surface finish and the internal diameter of the mouth and neck of sealable containers comprises means for pressurizing the container and providing a digital signal having a value indicative of the magnitude of the peak pressure in the container and means for prov

An apparatus for testing the sealing surface finish and the internal diameter of the mouth and neck of sealable containers comprises means for pressurizing the container and providing a digital signal having a value indicative of the magnitude of the peak pressure in the container and means for providing a defect signal if there are any obstructions in the mouth or neck of the container. A microcomputer maintains a running average value of selected ones of previously produced digital signals, compares the most recently produced digital signal to the running average value and provides a reject signal if the value of the most recent digital signal fails to exceed a percentage of the running average value. The microcomputer also provides a reject signal if it detects the presence of a defect signal. An initial average value is computed based upon selected ones of the digital numbers initially produced and the running average value is periodically compared to a percentage of the initial average value. An alarm signal is provided if the running average value fails to exceed the percentage of the initial average value.

대표청구항 ▼

Apparatus for testing the sealing surface finish of containers at a test area through which the containers are sequentially transported, comprising: (a) first means disposed at the test area for sealing the surface of the container with a flexible diaphragm, injecting a metered volume of gas into th

Apparatus for testing the sealing surface finish of containers at a test area through which the containers are sequentially transported, comprising: (a) first means disposed at the test area for sealing the surface of the container with a flexible diaphragm, injecting a metered volume of gas into the container and providing a sample of the pressure existing in the container; (b) second means coupled to the first means for producing a digital signal having a value indicative of the magnitude of the peak pressure existing in the container; and (c) third means coupled to the second means for computing a running average value of selected ones of previously produced digital signals, calculating a threshold value based on a percentage of the running average value, comparing the most recently produced digital signal to the threshold value and producing a reject signal when the value of the most recently produced digital signal is less than the threshold value.