Apparatus for monitoring stems of electrical light sources durin

Details Apparatus for monitoring stems of electrical light sources durin Apparatus for monitoring stems of electrical light sources durin

1975-10-06

1977-05-03

Lazarus, Richard B.

Metal working

Barrier layer or semiconductor device making

Barrier layer device making

29 2519, H01J 900

Patent

active

040205347

ABSTRACT:
The invention concerns monitoring of stems of electrical light sources during manufacture. Each stem is positioned or passes between two nozzles blowing compressed air in a direction where a hole in the pinch should be. The parallel axes of symmetry of the nozzles are arranged in a common plane, to intercept at an angle of or less than 180.degree., there being an angle of at most 85.degree. between the common plane and a reference plane that is perpendicular to the axis of symmetry of the stem. A flow-sensing device is disposed above the nozzles. Flow of compressed air detected by the device is indicative of stem quality, that is the presence of a hole on at least one side of the pinch and, is thus used to separate satisfactory stems from unsatisfactory ones.

REFERENCES:
patent: 3204329 (1965-09-01), Sweeney
patent: 3869772 (1975-03-01), Latassa et al.

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