Method of monitoring the temperature of a sterile docking cuttin

Details Method of monitoring the temperature of a sterile docking cuttin Method of monitoring the temperature of a sterile docking cuttin

1982-08-16

1984-07-24

Paschall, M. H.

Electric heating

Heating devices

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

340588, 219505, 219241, 219494, 12830314, H05B 102

Patent

active

044619510

ABSTRACT:
There is disclosed a method of monitoring the temperature of a cutting element in a sterile docking apparatus for splicing two sterile thermoplastic tubes together by using a resistor-heated cutting means, the method comprises (1) supplying a constant current to the resistor; (2) measuring the initial voltage of the resistor; (3) calculating, according to predetermined empirical relationship(s), the voltage, time or both required to achieve a desired cutting means temperature if the initial voltage is within a suitable range, (4) measuring repeatedly the voltage of the resistor and the time to determine whether (a) the voltage reaches the calculated voltage within a specified time frame or (b) the calculated time has been reached within a specified voltage range and (5) splicing the tubes with the cutting means if the time frame or voltage range is met. The method is also applicable to other resistor-heated elements in other devices having a constant heat load environment.

REFERENCES:
patent: Re30190 (1980-01-01), Shaw
patent: 3679871 (1972-07-01), Evalds
patent: 3789190 (1974-01-01), Orosy et al.
patent: 3869597 (1975-03-01), Strange
patent: 3924102 (1975-12-01), Hanekom
patent: 4081660 (1978-03-01), Uffer et al.
patent: 4219025 (1980-08-01), Johnson
patent: 4243875 (1981-01-01), Chang

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