Apparatus for examining the mouths of bottles and the like

Details Apparatus for examining the mouths of bottles and the like Apparatus for examining the mouths of bottles and the like

B - Operations, Transporting

65

B

240/88, 88/99, 9

B65B 57/00 (2006.01) G01N 21/90 (2006.01)

Patent

CA 2026272

APPARATUS FOR EXAMINING THE MOUTHS OF BOTTLES OR THE LIKE ABSTRACT Photographs for detecting defects in the upper end face of the lip (43) of the mouth are taken by a camera (18) arranged on the axis of a bottle to be examined. An annular, coaxial light-conducting member (30), which is surrounded by a light source (28), is disposed between the lip (43) and the camera (18). It has a central viewing opening (40) with the shape of a double truncated cone (40a,40b). The generated surface of the truncated cone (40a) adjacent to the lip forms a light exit surface (46a) to illuminate the lip (43). The angle of slope of the truncated cone (40a) is selected so that an annular truncated cone of light (52) falls on the upper face of the lip (43) and has an angle of incidence of about 45° in the middle thereof. This results in a dark- ground illumination of the lip (43). Should a defeat be present in the region of the upper end face of the lip (43), this becomes visible as light on a dark background. Lateral defects of the lip (43) can also be detected by an additional light-conducting member (34). Fig. 4.

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