Method and apparatus for heating plastic preforms with absorption measurement
AssigneeKrones AG
InventorsSimon Fischer, Ulrich Lappe, Stefan Schober
Life of this patent
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Abstract
Disclosed is a method for heating plastic preforms, wherein the plastic preforms are transported along a predetermined transport path and are heated during this transport by applying electromagnetic radiation, wherein an absorption and/or transmission of the plastic preforms is determined for radiation in an infrared wavelength range, wherein an absorption and/or transmission of the plastic preforms and/or of the plastic containers produced from these plastic preforms is determined for radiation in a visible wavelength range.
Claims15
A method for heating plastic preforms, wherein the plastic preforms are transported along a predetermined transport path and are heated during this transport by applying electromagnetic radiation, wherein an absorption and/or transmission of the plastic preforms is determined, at one location along the transport path, for radiation in an infrared wavelength range,
- wherein
- an absorption and/or transmission of the plastic preforms and/or of the plastic containers produced from these plastic preforms is also determined, at another location along the transport path, for radiation in a visible wavelength range, and wherein
- at least one absorption and/or transmission is measured depending on the location, wherein a region of the plastic preform and/or the surface of the plastic preform is examined with regard to its absorption and/or transmission.
An apparatus for heating plastic preforms, having a transport device configured to transport the plastic containers along a predetermined transport path, and having at least one heating device configured to heat the plastic preforms by applying electromagnetic radiation, and having first a detection device positioned at one location along the transport path, configured to detect an absorption and/or transmission of the plastic preforms for electromagnetic radiation in an infrared wavelength range,
- wherein
- the apparatus also has a second detection device positioned at another location along the transport path, configured to at least indirectly detect an absorption and/or transmission of the plastic preforms and/or of the plastic containers which are subsequently produced from these plastic preforms, for electromagnetic radiation in a visible wavelength range, and
- wherein at least one absorption and/or transmission is measured depending on the location, wherein a region of the plastic preform and/or the surface of the plastic preform is examined with regard to its absorption and/or transmission.
Dependencies are inferred from the claim text.