Method of automatically controlling the fusion process between t

Details Method of automatically controlling the fusion process between t Method of automatically controlling the fusion process between t

1994-11-02

1996-03-19

Paschall, Mark H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219497, 219482, 219535, 1562742, H05B 102

Patent

active

055005101

ABSTRACT:
A method of automatically controlling the fusion process of thermoplastic resin articles is done in a stepwise fashion. In response to a start signal, a current is applied to an electrical resistance heating element for fusing together facing resin surfaces. Electrical characteristics of the resistance heating element are calculated upon increase of the power to a given level and the specific heat of the resin is calculated through ON-OFF control of the resistance heating element. The power is then raised through stages based on the electrical characteristics of the resistance heating element and the specific heat to determine variation coefficients of the characteristics and specific heat at each stage and through further ON-OFF control. Finally, the power increase is stopped as the variation coefficient of specific heat reaches or becomes smaller than a given value. With the power established at a constant level, the ON-OFF cycles are continued until the specific heat becomes equal to or lower than a preset value. At that point the power is terminated, establishing an optimal operating condition for accurately fusing together any type of thermoplastic resin and any articles made therefrom.

REFERENCES:
patent: 4684789 (1987-08-01), Eggleston
patent: 5130518 (1992-07-01), Merle

Affiliated with

Also associated with

Rating

Method of automatically controlling the fusion process between t does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of automatically controlling the fusion process between t, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of automatically controlling the fusion process between t will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1960009