Apparatus for checking the quality of preforms each having a...

Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Sorting bottles – ampoules – jars – drinking vessels – or like...

Reexamination Certificate

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Details

C209S591000

Reexamination Certificate

active

07541556

ABSTRACT:
The apparatus is intended for performing quality checks on preforms (10) each having a body made of plastics material having an internal cavity (12) communicating with the exterior through an end opening (14) of the body. The apparatus comprises: a conveyor device (20) for transporting the preforms (10) along a predetermined path, an optical device (22) disposed along the path and suitable for forming an image of each of the preforms (10), a pneumatic device (24) disposed along the path and suitable for putting the internal cavity (12) of each of the preforms (10) under partial vacuum for a predetermined period of time, an electronic control unit (28) suitable for comparing the images of the preforms (10) with a standard reference image and/or for checking whether the value of the partial vacuum remains unchanged during the said period of time, and a selector device (26) disposed along the path and capable of separating the preforms (10) on the basis of the result of the comparison and/or checking operations performed by the control unit (28).

REFERENCES:
patent: 725589 (1903-04-01), Rehfuss
patent: 2432871 (1947-12-01), Fedorchak et al.
patent: 3495441 (1970-02-01), Laub
patent: 5571949 (1996-11-01), MacLaughlin et al.
patent: 5591899 (1997-01-01), Griesbeck
patent: 5719679 (1998-02-01), Shimizu et al.
patent: 6050134 (2000-04-01), Strand
patent: 6473169 (2002-10-01), Dawley et al.
patent: 6557695 (2003-05-01), Gerber et al.
patent: 11-100119 (1999-04-01), None
patent: WO 01/25761 (2001-04-01), None

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