Patent ID: 11872724
Assignee: SEALED AIR CORPORATION (US)
Field: Other special machines (Mechanical engineering)
Classification: CPC B  F  G | IPC A  B  C  G  H

Claim 10:
11. A method for detecting foaming chemical precursors in a foam-in-bag system, the foam-in-bag system configured to dispense the foaming chemical precursors between two plies of film into a bag formed from the two plies of film, the system comprising:
emitting, by a source positioned on a first side of the two plies of film, electromagnetic energy toward the two plies of film, wherein at least a portion of the emitted electromagnetic energy is within a range of wavelengths;
detecting, by a detector positioned on a second side of the two plies of film, electromagnetic energy within the range of wavelengths, wherein the detector is arranged to detect electromagnetic energy propagating away from the two plies of film;
generating signals, by the detector, indicative of intensity of detected electromagnetic energy within the range of wavelengths;
receiving, by a controller, the signals indicative of the detected electromagnetic energy within the range of wavelengths;
controlling, by the controller, operation of the foam-in-bag system based at least in part on the signals indicative of the detected electromagnetic energy within the range of wavelengths;
wherein the film is transmissive of electromagnetic energy in the range of wavelengths; and
wherein at least one of the foaming chemical precursors or foam formed from a reaction of the foaming chemical precursors is opaque to electromagnetic energy in the range of wavelengths.