Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Measuring – testing – or inspecting
Reexamination Certificate
2008-05-20
2008-05-20
McDowell, Suzanne E. (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
Direct application of electrical or wave energy to work
Measuring, testing, or inspecting
C264S040100, C264S523000, C425S141000, C425S174400, C425S538000
Reexamination Certificate
active
07374713
ABSTRACT:
A method of manufacturing plastic containers. The method may comprise the steps of (1) forming a plastic container from a preform in a blow-molder, where the blow-molder comprises a plurality of molds and spindles; and (2) inspecting the plastic container after formation in the blow-molder. The containers are inspected by impinging infrared light thereon and detecting the portion of the infrared light that passes through the container and converting the same into corresponding electrical signals which are delivered to a microprocessor. The microprocessor receives signals from sensors associated with the blow-molder relating to the position of the molds, the identity of the molds and the identity of the spindles in order that the information that is determined by inspection can be associated with specific molds and spindles. The information may be visually displayed so as to provide feedback regarding the inspection process. In a preferred embodiment wall thickness measurements are taken at several vertically spaced positions simultaneously. Corresponding apparatus is provided.
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Birckbichler Craig Alan
Jebadurai Sudha Christy
Puvak Ronald A.
Schmidt William E.
Wolfe Georg V.
AGR International, Inc.
Kirkpatrick & Lockhart Preston Gates & Ellis LLP
McDowell Suzanne E.
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