Method and apparatus for packaging articles into sheeted thermoplastic packaging materials

【Patent Type】 Invention Patent 【Patent Name】 Method and Equipment for Packaging Articles into Thermoplastic Packaging Materials 【Applicant】 GIDUI Joint Stock Company [Inventor] Mario Spatafora; Bruno Toma Sini [address of the main applicant] Bologna, Italy [application number] 02808390.3
【 Application Date 】 2002.04.17
[Examination and announcement number] 1503903
【 Validation announcement date 】 2004.06.09
【 Main Classification 】 G01K13/06
[Category] G01K13/06
[Sovereign Items] 1. A method of packaging articles (3) into a sheet of thermoplastic packaging material (4), said method comprising: folding a sheet of packaging material (4) around articles (3) so as to form a sheet At least two parts of the packaging material (4) overlap; the overlapping parts are brought into contact with an at least partially metallic and looped band (5), by which the two overlapping parts are sealed, with and by The current induced by the first electrical winding (13) coupled to the belt (5) heats the belt (5); detects the temperature (T) of the belt (5); and controls the current induced in the belt (5) ( I) in order to keep the temperature (T) in a given range; the method is characterized by determining a characteristic function that will take the resistance (R) of the strip (5) and the temperature of the strip (5) (T) ) linking; detecting the first signal (S1, S3) associated with the voltage (V) applied to the band (5) and the second signal (S2) associated with the current (I) circulating in the band (5) Calculate the resistance (R) of the strip (5), where the resistance (R) of the strip (5) is a function of the first signal (S1, S3) and the second signal (S2); and use the eigenfunction to detect the band (5) Temperature (T), where The sign function relates the resistance (R) of the belt (5) to the temperature (T) of the belt (5).
[Instructions CD-ROM] D0423
[Abstract] In the method of packaging articles into a sheet of thermoplastic material, by detecting the first signal (S1) associated with the voltage (V) applied to the belt (5) and with the circulation along the belt (5) The current (I) related second signal (S2), and the temperature of the band (5) is detected by calculating the resistance (R) of the band (5), wherein the band (5) is at least partially metallic and looped, and The tape (5) is inductively heated to seal the packaging material (4), the resistance (R) of the tape (5) is calculated as a function of the first and second signals (S1, S2); the tape (5) The resistance (R) is related to the temperature (T) of the belt (5).
【 Agency 】 Zhongke Patent & Trademark Agency Co., Ltd. [Proxy] Liu Xiaofeng