Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Measuring – testing – or inspecting
Reexamination Certificate
2008-05-27
2008-05-27
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
07378047
ABSTRACT:
A method of inspecting wall thickness of blow-molded plastic containers includes providing a blow-molder having a plurality of molds and a plurality of associated spindles. 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 compares the electrical signals with stored information regarding desired wall thickness of the container and emits output thickness information. 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 wall thickness information that is determined by inspection can be associated with specific molds and spindles. The wall thickness information may be averaged over a period of time or a number of containers. 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.
Eckert Seamans Cherin & Mellott , LLC
Levy Philip E.
McDowell Suzanne E.
Silverman Arnold B.
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