US 11,673,348 B1
Heat seal bar sensorless temperature sensing and control
Brody Alan Viator, Lafayette, LA (US); and Clifford Dunlap, Baton Rouge, LA (US)
Assigned to AMERIGLOBE, LLC, Lafayette, LA (US)
Filed by AMERIGLOBE, LLC, Lafayette, LA (US)
Filed on May 26, 2021, as Appl. No. 17/330,668.
Claims priority of provisional application 63/154,780, filed on Feb. 28, 2021.
Claims priority of provisional application 63/030,227, filed on May 26, 2020.
Int. Cl. B29C 65/20 (2006.01); B29C 65/00 (2006.01); B65D 88/16 (2006.01); B65D 88/54 (2006.01); G01K 7/02 (2021.01); G01K 15/00 (2006.01); B29L 31/00 (2006.01)
CPC B29C 66/91421 (2013.01) [B29C 65/20 (2013.01); B65D 88/1681 (2013.01); B65D 88/54 (2013.01); G01K 7/02 (2013.01); G01K 15/005 (2013.01); B29L 2031/7128 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for temperature sensing and control of a heating element of a heat seal bar, the system comprising:
a) a control panel that includes a controller, a transducer, a transformer and a switching device;
b) a heat seal bar including a heating element;
c) a sensor that is in contact with the heating element of the heat seal bar prior to using the heat seal bar in a heat seal cycle and removable from the heat seal bar during heating in the heat seal cycle;
d) wherein the controller is operable to provide calibration values of the heat seal bar during a calibration cycle based on temperature values received from the sensor and electrical resistance values of the heating element;
e) wherein the transformer is operable to apply power to the heating element after the calibration cycle when the sensor is removed from the heating element;
f) wherein the transducer is operable to process voltage and current feedback signals received from the heat seal bar, which the controller uses to calculate real-time electrical resistance of the heating element during the heat seal cycle; and
g) wherein the controller calculates temperature of the heating element during heating based on the real-time electrical resistance of the heating element in step (f) and calibration data acquired by the controller.