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 0:
1. A system 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:
a source positioned on a first side of the two plies of film and configured to emit electromagnetic energy toward the two plies of film, wherein at least a portion of the emitted electromagnetic energy is within a range of wavelengths;
a detector positioned on a second side of the two plies of film and arranged to detect electromagnetic energy propagating away from the two plies of film, wherein the detector is configured to:
detect electromagnetic energy within the range of wavelengths, and
generate signals indicative of intensity of detected electromagnetic energy within the range of wavelengths; and

a controller configured to receive the signals indicative of the detected electromagnetic energy within the range of wavelengths and to control 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.