System for monitoring material dispensed onto a substrate

Details System for monitoring material dispensed onto a substrate System for monitoring material dispensed onto a substrate

1985-10-07

1988-03-01

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250341, G01J 100

Patent

active

047287934

ABSTRACT:
A system for monitoring energy radiant from a material dispensed onto a substrate. As disclosed, an infrared sensor is positioned to receive infrared energy radiated by a substrate and by a heated adhesive applied to the substrate, with the resistance of the sensor varying in dependence upon the amount of infrared energy received. An amplifier has an input capacitively coupled to the sensor, and the voltage at the amplifier input varies in dependence upon the resistance of the sensor. The output voltage of the amplifier varies in dependence upon the amplifier input voltage, and hence upon the amount of infrared energy reaching the sensor. In order to prevent inaccuracies in the amplifier output signal due to, for example, temperature-related resistance variations of the sensor, the amplifier input is grounded during intervals when the sensor receives infrared energy from the substrate and ungrounded shortly before the sensor begins to receive infrared energy from the heated adhesive.

REFERENCES:
patent: 3411008 (1968-11-01), Coombes et al.
patent: 3482781 (1969-12-01), Sharpe
patent: 3816025 (1974-06-01), O'Neill
patent: 3818335 (1974-06-01), Stungis et al.
patent: 3855489 (1974-12-01), Striker et al.
patent: 3976989 (1976-08-01), Smith
patent: 4019653 (1977-04-01), Scherer et al.
patent: 4023020 (1977-05-01), Lestradet
patent: 4063824 (1977-12-01), Baker et al.
patent: 4072934 (1978-02-01), Hiller et al.
patent: 4149254 (1979-04-01), Molusis
patent: 4188624 (1980-02-01), Hochsprung et al.
patent: 4251566 (1981-01-01), Gingerich
patent: 4315317 (1982-02-01), Orchard et al.
patent: 4389969 (1983-06-01), Johnson
patent: 4430886 (1984-02-01), Rood
patent: 4498415 (1985-02-01), Tsuchiya et al.
Exergen Corporation literature (14 pages), 1984-1986.
Eltec Publication 815/815B IR-EYE Sensing Monitor (11 pages), 1984.

Affiliated with

Also associated with

Rating

System for monitoring material dispensed onto a substrate does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System for monitoring material dispensed onto a substrate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for monitoring material dispensed onto a substrate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-999591