Method for presterilizing a tubular pouch packing machine
First Claim
1. A method of pre-sterilizing a tubular bag packing machine wherein, in permanent operation, at least one tubular strip (3) is formed from a web of packing material (PB) supplied in timed sequence from a magazine roll (1), with the said tubular strip moving past a sterilizing means (2), and wherein the said tubular strip (3) underneath a forming and filling station (4) is cross-sealed, filled via a loading material meter (5) through the forming and filling pipe (4′
- ) of the forming and filling station (4), withdrawn by a bag length and again cross-sealed and filled, with the advance of the web of packing material (2) taking place behind the magazine roll (1) within a pre-sterilized sterile chamber (6) under excess pressure of sterile air, with the pre-sterilization being carried out in the following steps;
1.1 sterilizing the loading material meter (5) by means of saturated steam;
1.2 upon completion of the vapour supply, supplying sterile air to the meter (5) and into the sterile chamber (6) and maintaining the sterile air supply during the subsequent steps;
1.3 withdrawing the web of packing material (PB) from the magazine roll (1) through the sterile chamber (6), partially kept open for the withdrawal of the web while forming a tube down to underneath the forming station (4);
1.4 closing the sterile chamber (6) and supplying a mixture of sterile agent and steam to the sterile chamber, with the tube of packing material (3) being kept open or being opened at the bottom;
1.5 upon completion of the sterilization by the mixture of sterile agent and steam, the sterile chamber (6) and all elements contained therein are dried by the flow of air maintained sterile;
1.6 upon completion of the drying process, the supply of sterile air to the meter (5) is discontinued, yet maintained to the sterile chamber (6); and
1.7 subsequently, the tube end formed by cross sealing and respectively withdrawn by a bag length is filled via meter (5).
2 Assignments
0 Petitions
Accused Products
Abstract
For pre-sterilizing a tubular bag packing machine to be operated under sterile conditions after the pre-sterilization phase, following the steam sterilization of the device metering the loading material and forming part of the machine, and of the forming pipe simultaneously serving as a filling pipe, the subsequent supply of sterile air to the meter, to the forming pipe and to the sterile chamber will be maintained. The longitudinally sealed tube of packing material formed on the forming pipe from the web of packing material is kept open underneath the opening of the sterile chamber in order to allow both the sterile air and the mixture of steam and sterilization agent conducted after pre-sterilization of the metering device into the sterile chamber to be discharged through the forming pipe and the tube of packing material open at the bottom.
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Citations
8 Claims
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1. A method of pre-sterilizing a tubular bag packing machine wherein, in permanent operation, at least one tubular strip (3) is formed from a web of packing material (PB) supplied in timed sequence from a magazine roll (1), with the said tubular strip moving past a sterilizing means (2), and wherein the said tubular strip (3) underneath a forming and filling station (4) is cross-sealed, filled via a loading material meter (5) through the forming and filling pipe (4′
- ) of the forming and filling station (4), withdrawn by a bag length and again cross-sealed and filled, with the advance of the web of packing material (2) taking place behind the magazine roll (1) within a pre-sterilized sterile chamber (6) under excess pressure of sterile air, with the pre-sterilization being carried out in the following steps;
1.1 sterilizing the loading material meter (5) by means of saturated steam;
1.2 upon completion of the vapour supply, supplying sterile air to the meter (5) and into the sterile chamber (6) and maintaining the sterile air supply during the subsequent steps;
1.3 withdrawing the web of packing material (PB) from the magazine roll (1) through the sterile chamber (6), partially kept open for the withdrawal of the web while forming a tube down to underneath the forming station (4);
1.4 closing the sterile chamber (6) and supplying a mixture of sterile agent and steam to the sterile chamber, with the tube of packing material (3) being kept open or being opened at the bottom;
1.5 upon completion of the sterilization by the mixture of sterile agent and steam, the sterile chamber (6) and all elements contained therein are dried by the flow of air maintained sterile;
1.6 upon completion of the drying process, the supply of sterile air to the meter (5) is discontinued, yet maintained to the sterile chamber (6); and
1.7 subsequently, the tube end formed by cross sealing and respectively withdrawn by a bag length is filled via meter (5). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- ) of the forming and filling station (4), withdrawn by a bag length and again cross-sealed and filled, with the advance of the web of packing material (2) taking place behind the magazine roll (1) within a pre-sterilized sterile chamber (6) under excess pressure of sterile air, with the pre-sterilization being carried out in the following steps;
Specification