Invention Grant
US06903315B2 Method and unit for wrapping an article in a sheet of thermoplastic wrapping material
失效
用于将物品包裹在热塑性包装材料片中的方法和单元
- Patent Title: Method and unit for wrapping an article in a sheet of thermoplastic wrapping material
- Patent Title (中): 用于将物品包裹在热塑性包装材料片中的方法和单元
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Application No.: US10474401Application Date: 2002-04-17
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Publication No.: US06903315B2Publication Date: 2005-06-07
- Inventor: Mario Spatafora , Bruno Tommasini
- Applicant: Mario Spatafora , Bruno Tommasini
- Applicant Address: IT Bologna
- Assignee: G. D Societa' per Azioni
- Current Assignee: G. D Societa' per Azioni
- Current Assignee Address: IT Bologna
- Agency: Ladas & Parry LLP
- Priority: ITBO2001A0224 20010417
- International Application: PCT/IT02/00241 WO 20020417
- International Announcement: WO02/08424 WO 20021024
- Main IPC: G01K13/08
- IPC: G01K13/08 ; B65B51/10 ; B65B51/18 ; G01K13/06 ; H05B6/06
Abstract:
In a method for wrapping an article in a sheet of thermoplastic wrapping material, the temperature of an at least partly metal belt (5) looped and induction heated to seal wrapping material (4) is detected by detecting a first signal (S1) to the voltage (V) applied to the belt (5), and a second signal (S2) related to the current (I) circulating along the belt (5); and by calculating the electric resistance (R) of the belt (5) as a function of the first and second signal (S1, S2); the electric resistance (R) of the belt (5) being related to the temperature (T) of the belt (5).
Public/Granted literature
- US20040155033A1 Method and unit for wrapping an article in a sheet of thermoplastic wrapping material Public/Granted day:2004-08-12
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