US3854874A - Apparatus for controlling the atmosphere of the sterile chamber in an aseptic packaging machine - Google Patents

Apparatus for controlling the atmosphere of the sterile chamber in an aseptic packaging machine Download PDF

Info

Publication number
US3854874A
US3854874A US00269518A US26951872A US3854874A US 3854874 A US3854874 A US 3854874A US 00269518 A US00269518 A US 00269518A US 26951872 A US26951872 A US 26951872A US 3854874 A US3854874 A US 3854874A
Authority
US
United States
Prior art keywords
chamber
atmosphere
flow circuit
flow
combination
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00269518A
Inventor
W Loliger
R Schmied
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alpura Koreco AG
Original Assignee
Alpura Koreco AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alpura Koreco AG filed Critical Alpura Koreco AG
Application granted granted Critical
Publication of US3854874A publication Critical patent/US3854874A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B55/00—Preserving, protecting or purifying packages or package contents in association with packaging
    • B65B55/02—Sterilising, e.g. of complete packages
    • B65B55/04—Sterilising wrappers or receptacles prior to, or during, packaging
    • B65B55/10—Sterilising wrappers or receptacles prior to, or during, packaging by liquids or gases
    • B65B55/103—Sterilising flat or tubular webs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S118/00—Coating apparatus
    • Y10S118/10—Pipe and tube inside

Definitions

  • I ABSTRACT An apparatus for controlling the atmosphere of the sterile chamber in an aseptic packaging machine of the kind in which packaging material in web form is first brought in contact with a chemically acting sterilising liquid and is subsequently led through the' interior of a sterile chamber inside which the packaging material is freed from liquid residues, and in which the packaging material is formed into a flexible tube and subdivided into individual, filled packages, in which the interior of the sterile'chamber forms part of a flow circuit in which the mixture of chamber air and sterilising agent vapour forming the chamber atmosphere are circulated with the aid of a conveying means, in -which further throttle means' are provided between the chamber and conveying means for generating aboveambientpressure in the sterile chamber,
  • the invention relates to an apparatus for controlling the atmosphere of the sterile chamber in an aseptic packaging machine, of the kind in which packaging material in web form is first brought in contact with a chemically acting sterilising liquid and subsequently led through the interior of a sterile chamber inside which the packaging material is freed from liquid residues, and in which the packaging material is formed into a flexible tube and subdivided into individual, filled packages.
  • the apparatus according to theinvention is characterised in that the interior of the sterile chamber forms part of a flow circuit in'which the mixture of chamber air and sterilising agent vapor forming the chamber atmosphere can be circulated with the aid ofa conveying means, in that further throttle means are provided between the chamber and conveying means for generating above-ambient pressure in the sterile chamber and in that the circuit has means for limiting the concentration of the chemical sterilising agent in the atmosphere filling the sterile chamber.
  • a limitation of the concentrationof the chemical sterilising agent in the sterile chamber atmosphere in the sense of the invention makes it possible, by limiting the concentration to less than the dew point concentration, to prevent the formation of condensates that may otherwise enter the packages together with the contents to be packaged and have a harmful effect on the contents. Furthermore, explosions can be reliably eliminated and the danger of corrosion avoided.
  • the apparatus may be provided in such a way that a connection with the surrounding air exists between the throttle location and the conveying means by means of which environmental air can be introduced into the circuit as a replacement for the mixture taken from the above-ambient pressure portion of the circuit.
  • a connection with the surrounding air exists between the throttle location and the conveying means by means of which environmental air can be introduced into the circuit as a replacement for the mixture taken from the above-ambient pressure portion of the circuit.
  • the take-off point can be suitably located in the lowermost region of the chamber and at the same time serve for discharging condensed sterilising agent.
  • a packaging machine in which the packaging material is'formed into a flexible tube.
  • an annular gap serving as throttle means at the exit of the flexible tube from the sterile chamber between the flexible tube and parts of the sterile chamber bottom.
  • a secondchamber surrounding the tube follows this annular gap, from which the circuit line leading to the conveying means branches off.
  • the bottom of the second chamber forms a further annular gap together with the wall of the flexible tube through which the replacement air taken from the surroundings can enter the circuit.
  • A'n embodiment of this type prevents the entry of organism-laden surrounding air into the interior of the sterile chamber in particularly efficient manner.
  • FIG. 1 is a vertical section of a packaging machine in which a continuously fed paper web covered with plastics material is formed into a tube in the interior of a sterile chamber and the tube is subdivided into individual filled packages;
  • FIG. 2 shows an arrangement corresponding to that of FIG. 1 with an alternative introduction of the replacement air
  • FIG. 3 shows a special construction of the annular gap between the tube wall and-the chamber bottom.
  • a paper web 12 coated on one side with plastics material is continuously withdrawn from a supply roll 11, drawn through agents 17 are located which enable a slight aboveambient pressure to be maintained in the chamber 14.
  • the web is led through a blowing device 15' in which heated sterile air from a line 18 is blown on both sides of the web at high speed through slotted pipes 16.
  • the sterilising liquid still adhering to the web 15 is in this way atomised or volatilised into the chamber atmosphere.
  • the web After passing a direction changing roll 19, the web is, with the aid of the forming agents 20, 21 and 22, formed into a flexible tube which is welded together along the sides of the web to form a closed tube.
  • Air for welding is aspired from the surroundings with the aid of a blower 24, is heated with the aid of a heating spiral 25 and after passing a steriliser 26 is blown into a gap between the two overlapping longitudinal edges with the aid of a hood 2 7.
  • the plastics material located on the inside of the tube 23 is heated and contact rolls 28 effect hermetic welding with formation of a longitudinal seam.
  • a filling tube 29 protrudes into the interior-of the packaging tube and-with its aid the tube 23 is filled approximately to a level 30 with the sterile liquid to be packaged, e.g., pasteurized milk.
  • the sterile liquid to be packaged e.g., pasteurized milk.
  • the partly filled tube is subdivided into individual filled packages.
  • tetrahedral packages 32 are formed in known manner.
  • the interior of the sterile chamber is subjected to a preliminary sterilisation, for example by spraying a chemically active sterilising liquid combined with the feeding in of heated'air through the line 18.
  • the interior of the chamber 14 forms the component of a circuit in which the mixture of chamber air and sterilising agent vapor forming the chamber atmosphere is circulated with the aid of a conveying means such as a fan 33.
  • a conveying means such as a fan 33.
  • the bottom 34 of the chamber 14 is dish-shaped and at the lowest point a discharge take-off line 35 branches off and leads to a liquid separator 36. Separated liquid can be discharged periodically by means of a tap 37.
  • the mixture freed from liquid droplets enters the fan 33 through a line 38 and subsequently passes through a line- 39 into a filter 40, in whose inlet chamber 41 an electrically heated spiral heater 42 is located. From the filter 40, the conveyed medium returns to the chamber 14 via the line 18, namely into the blowing device 16.
  • a throttle means 43 is located in the line 38 to generate a small above-ambient pressure of, for example, S-mm water head in the chamber 14 while the fan 33 is running.
  • a means for limiting the concentration of the chemical sterilizing agent in the atmosphere filling the sterile chamber includes a line 44 which connects into the line 38 between the throttle means 43 and the fan 33 and through it fresh air from the surroundings can enter the described circuit.
  • a float-type fl'ow meter air from the surroundings enters the circuit through the line 44 to replace the mixture discharged from the circuit.
  • the temperature of the mixture fed in through the line 18 is suitably 120C.
  • a ratio of circulated mixture to introduced replacement air of about 2 2 I has been found to be suitable.
  • the meansfor limiting the concentration of sterilizing agent in the atmosphere filling the chamber includes a second chamber 52 which surrounds the tube 23 and follows on the annular gap 51 and from it the line 54 leading to the separator 53 branches off.
  • the bottom 55 of the second chamber forms a further annular gap 56 together with the flexible tube wall, through which the replacement air taken from the surroundings can enter the circuit'The air entering by the gap 56 prevents any mixtures of air and sterilising agent from leaking outside.
  • this circuit uses a conveying means in the form of a fan 57 and a filter means 58 with heating coil 59 from which the sterile mixture of air and sterilising agent vapor enters the blowing device 15, 16 via a line 60.
  • An indicating meter 62 is located in a line 61 between the separator 53 and the conveying means 57.
  • a ,line'63 branches off and is closed with the aid of a valve means such as a weighted flap 64.
  • a weight 65 is adjusted in such a way that at a predetermined pressure, chamber atmosphere is blown off. Non-condensed portions are condensed with the aid of cold water fed into an injection condenser 67, through a line 68.
  • a definite concentration of sterilising agent is once more maintained in the atmosphere of the chamber 14.
  • the chamber 52 is subdivided into two annular spaces with the air of a wall 71 coaxial with the axis of the flexible tube, an electrical spiral heater 73' being located in the annular space 72 between wall 71 and tube 23.
  • This heater 73 serves to volatilize the liquid sterilising agent depositing on the walls of the flexible tube during the preliminary sterilizing of the chamber 14. in this way sterilising agent having a corrosive action is prevented from entering the sensitive device' for producing the transverse welding seams.
  • FIG. 3 shows details 'of a suitable construction-for forming the gap betweenthe flexible tube 23 and the bottom of thesterile chamber.
  • cutting edges 82 are coaxial with the axis of the flexible tube 23 on the bottom 81 of the sterile chamber (not shown).
  • a plate 83 On the cutting edges 82 rests a plate 83, whose bore 84 is dimensioned such that an annular gap 85 of predetermined width is formed between the tube and the bore 84.
  • the plate 83 resting on the cutting edges 82 can follow small lateral movements of the tube 23.
  • the concentration of the chemical sterilising agent is limited in the chamber by a chemical'substance .or composition in the circuit,
  • metal fillings which is able to bind or catalytically decompose the sterilising agent or an undesirable component of the same in such a way that no undesired concentration can arise in the chamber.
  • an apparatus for control--- ling the atmosphere of said sterile chamber comprising a flow circuit including said sterile chamber for a flow of a mixture of chamber air and sterilizing agent vapor forming the chamber atmosphere, a conveying means in said flow circuit for recirculating the flow, throttle means between said chamber and said conveying means for generating an above-ambient pressure in said chamber, and means for limiting the concentration of the sterilizing agent in the atmosphere filling said chamber.
  • said means for limiting said concentration includes a line connected to said flow circuit between said throttle means and said'conveying means for introducing surrounding air into said flow circuit.
  • said means for limiting said concentration further includes a line connected to said flow circuit upstream of said throttle means and an adjustable blow-off valve in said line for discharging the chamber atmosphere when a predetermined pressure is exceeded in said chamber.
  • said means for limiting said concentration includes a second chamber in said flow circuit downstream of said throttle means for passage of the flexible tube therethrough, said second chamber having an open bottom to define a gap with the flexible tube for introducing surrounding air into said flow circuit.
  • throttle means is a gap between an open bottom of a flow circuit including said sterile chamber for a flow of a mixture of chamber air and sterilizing agent vapor forming the chamber atmosphere
  • an adjustable blow-off valve connected to said flow circuit upstream of said throttle means to allow chamber atmosphere to discharge when a predetermined pressure is exceeded in said chamber, and r a line connected to said flow circuit between said throttle means and said conveying means for introducing surrounding air into said. flow circuit to replace the atmosphere discharged through said blow-off valve.
  • an apparatus for controlling the atmosphere of said sterile chamber comprising a flow circuit including said sterile chamber for a flow of a mixture of chamber air and sterilizing agent vapor forming the chamber atmosphere,
  • throttle means between said chamber and said con-- 13.
  • the combination as set forth in claim 12 which further comprises a partition in said second chamber coaxially of the path of the flexible tube for subdividing said second chamber, and a heater within said partition for volatilizing liquid sterilizing agent on the outer surface of the flexible tube.

Abstract

An apparatus for controlling the atmosphere of the sterile chamber in an aseptic packaging machine of the kind in which packaging material in web form is first brought in contact with a chemically acting sterilising liquid and is subsequently led through the interior of a sterile chamber inside which the packaging material is freed from liquid residues, and in which the packaging material is formed into a flexible tube and subdivided into individual, filled packages, in which the interior of the sterile chamber forms part of a flow circuit in which the mixture of chamber air and sterilising agent vapour forming the chamber atmosphere are circulated with the aid of a conveying means, in which further throttle means are provided between the chamber and conveying means for generating aboveambient pressure in the sterile chamber, and in which the circuit has means for limiting the concentration of the chemical sterilising agent in the atmosphere filling the sterile chamber.

Description

United States Patent Loliger et al.
[ APPARATUS FOR CONTROLLING THE ATMOSPHERE OF THE STERILE CHAMBER IN AN ASEPTIC PACKAGING MACHINE Inventors: Willi Loliger; Rudolf Schmied, both of Konolfingen, Switzerland [73] Assignee: Alpura Koreco A. G., Konolfingen,
Switzerland [22] Filed: July 7, 1972 [2]] Appl. No.: 269,518
10/1972 Garzotto 118/67 X 1' Dec. 17, 1974 Primary Examiner-Joseph Scovronek 7 Assistant Examiner-Arnold Turk Attorney, Agent, or FirmKenyon & Kenyon Reilly Carr & Chapin [5 7] I ABSTRACT An apparatus for controlling the atmosphere of the sterile chamber in an aseptic packaging machine of the kind in which packaging material in web form is first brought in contact with a chemically acting sterilising liquid and is subsequently led through the' interior of a sterile chamber inside which the packaging material is freed from liquid residues, and in which the packaging material is formed into a flexible tube and subdivided into individual, filled packages, in which the interior of the sterile'chamber forms part of a flow circuit in which the mixture of chamber air and sterilising agent vapour forming the chamber atmosphere are circulated with the aid of a conveying means, in -which further throttle means' are provided between the chamber and conveying means for generating aboveambientpressure in the sterile chamber, and in which the circuit has means for limiting the concentration of the chemical sterilising agent in the atmosphere filling the sterile chamber.
13 Claims, 3 Drawing Figures APPARATUS FOR CONTROLLING THE ATMOSPHERE OF THE STERILE CHAMBER IN AN ASEPTIC PACKAGING MACHINE The invention relates to an apparatus for controlling the atmosphere of the sterile chamber in an aseptic packaging machine, of the kind in which packaging material in web form is first brought in contact with a chemically acting sterilising liquid and subsequently led through the interior of a sterile chamber inside which the packaging material is freed from liquid residues, and in which the packaging material is formed into a flexible tube and subdivided into individual, filled packages.
There is a danger in an apparatus of the above type that the sterilisation liquid which is removed from the packaging material in the interior of the sterile chamber may lead to an excessive concentration of the sterilising agent in the chamber atmosphere. As a rule, hydrogen peroxide (H is employed as the sterilising agent. Thus, at an excessive concentration there is a danger that condensate formation from a supersaturated atmosphere may allow the chemical sterilising agent to enter the bottom of the packaging tube and hence the individual packs. Further, an excessive con-. centration can easily lead to explosions. Finally, the danger of corrosion is also very substantially increased if the chamber atmosphere is loaded excessively with the sterilising agent;
It is the aim of the invention to eliminate the described disadvantages. The apparatus according to theinvention is characterised in that the interior of the sterile chamber forms part of a flow circuit in'which the mixture of chamber air and sterilising agent vapor forming the chamber atmosphere can be circulated with the aid ofa conveying means, in that further throttle means are provided between the chamber and conveying means for generating above-ambient pressure in the sterile chamber and in that the circuit has means for limiting the concentration of the chemical sterilising agent in the atmosphere filling the sterile chamber.
A limitation of the concentrationof the chemical sterilising agent in the sterile chamber atmosphere in the sense of the invention makes it possible, by limiting the concentration to less than the dew point concentration, to prevent the formation of condensates that may otherwise enter the packages together with the contents to be packaged and have a harmful effect on the contents. Furthermore, explosions can be reliably eliminated and the danger of corrosion avoided.
-Suitably, the apparatus may be provided in such a way that a connection with the surrounding air exists between the throttle location and the conveying means by means of which environmental air can be introduced into the circuit as a replacement for the mixture taken from the above-ambient pressure portion of the circuit. By adjusting the ratio of replaced air and amount circulated, it is possible to limit the concentration of the chemical sterilising agent in the atmosphere filling the sterile chamber in simple manner.
Further, the take-off point can be suitably located in the lowermost region of the chamber and at the same time serve for discharging condensed sterilising agent. In a preferred embodiment, with a packaging machine in which the packaging material is'formed into a flexible tube. inside the sterile chamber, an annular gap serving as throttle means at the exit of the flexible tube from the sterile chamber between the flexible tube and parts of the sterile chamber bottom. A secondchamber surrounding the tube follows this annular gap, from which the circuit line leading to the conveying means branches off. The bottom of the second chamber forms a further annular gap together with the wall of the flexible tube through which the replacement air taken from the surroundings can enter the circuit. A'n embodiment of this type prevents the entry of organism-laden surrounding air into the interior of the sterile chamber in particularly efficient manner.
In the above described embodiment it is advisable also to subdivide the second chamber by means of a partition spaced away from the tube wall and coaxial with the tube axis, a heater being located in the space between the partition and the tube wall for volatilising liquid sterilising agent on the tube wall during the preliminary sterilisation of the apparatus.
The invention and its further features and advantages will now be described in greater detail by means of the embodiments shown by way of example in the accompanying drawings, in which:
FIG. 1 is a vertical section of a packaging machine in which a continuously fed paper web covered with plastics material is formed into a tube in the interior of a sterile chamber and the tube is subdivided into individual filled packages;
FIG. 2 shows an arrangement corresponding to that of FIG. 1 with an alternative introduction of the replacement air; and
FIG. 3 shows a special construction of the annular gap between the tube wall and-the chamber bottom.
In the embodiment according to FIG. 1 a paper web 12 coated on one side with plastics material is continuously withdrawn from a supply roll 11, drawn through agents 17 are located which enable a slight aboveambient pressure to be maintained in the chamber 14. The web is led through a blowing device 15' in which heated sterile air from a line 18 is blown on both sides of the web at high speed through slotted pipes 16. The sterilising liquid still adhering to the web 15 is in this way atomised or volatilised into the chamber atmosphere.
After passing a direction changing roll 19, the web is, with the aid of the forming agents 20, 21 and 22, formed into a flexible tube which is welded together along the sides of the web to form a closed tube. Air for welding is aspired from the surroundings with the aid of a blower 24, is heated with the aid of a heating spiral 25 and after passing a steriliser 26 is blown into a gap between the two overlapping longitudinal edges with the aid of a hood 2 7. During this operation the plastics material located on the inside of the tube 23 is heated and contact rolls 28 effect hermetic welding with formation of a longitudinal seam. A filling tube 29 protrudes into the interior-of the packaging tube and-with its aid the tube 23 is filled approximately to a level 30 with the sterile liquid to be packaged, e.g., pasteurized milk. With the aid of the revolving welding punches 31 the partly filled tube is subdivided into individual filled packages. By using a corresponding welder operating at right angles to the plane of the drawing tetrahedral packages 32 are formed in known manner.
Before starting up the packaging machine the interior of the sterile chamber is subjected to a preliminary sterilisation, for example by spraying a chemically active sterilising liquid combined with the feeding in of heated'air through the line 18.
The interior of the chamber 14 forms the component of a circuit in which the mixture of chamber air and sterilising agent vapor forming the chamber atmosphere is circulated with the aid of a conveying means such as a fan 33. For this purpose the bottom 34 of the chamber 14 is dish-shaped and at the lowest point a discharge take-off line 35 branches off and leads to a liquid separator 36. Separated liquid can be discharged periodically by means of a tap 37. The mixture freed from liquid droplets enters the fan 33 through a line 38 and subsequently passes through a line- 39 into a filter 40, in whose inlet chamber 41 an electrically heated spiral heater 42 is located. From the filter 40, the conveyed medium returns to the chamber 14 via the line 18, namely into the blowing device 16.
A throttle means 43 is located in the line 38 to generate a small above-ambient pressure of, for example, S-mm water head in the chamber 14 while the fan 33 is running. A means for limiting the concentration of the chemical sterilizing agent in the atmosphere filling the sterile chamber includes a line 44 which connects into the line 38 between the throttle means 43 and the fan 33 and through it fresh air from the surroundings can enter the described circuit. A float-type fl'ow meter air from the surroundings enters the circuit through the line 44 to replace the mixture discharged from the circuit. By suitably adjusting the blow-off valve 47, the concentration of the chemical sterilising agent in the atmosphere filling the chamber 14 can be controlled in simple manner. When a 10 to 40 percent solution of hydrogen peroxide is used, it is advisable to maintain a concentration of 25 g per L000 g of air in the chamber 14. Such a value on the one hand reliably eliminates the disadvantages described at the outset and on the other hand ensures more certain aseptic operation where a leak allows an organism to penetrate into the interior.
During operation of the described apparatus the temperature of the mixture fed in through the line 18 is suitably 120C. To reach the preferredconcentration of sterilising agent in the chamber atmosphere, a ratio of circulated mixture to introduced replacement air of about 2 2 I has been found to be suitable.
in the arrangement according to FIG. 2 wherein like reference characters indicate like parts as above the throttling corresponding to the throttle means of FIG. 1 is obtained with'a gap 51 between the flexible tube 23 and the open bottom 34 of the chamber 14. The meansfor limiting the concentration of sterilizing agent in the atmosphere filling the chamber includes a second chamber 52 which surrounds the tube 23 and follows on the annular gap 51 and from it the line 54 leading to the separator 53 branches off. The bottom 55 of the second chamber forms a further annular gap 56 together with the flexible tube wall, through which the replacement air taken from the surroundings can enter the circuit'The air entering by the gap 56 prevents any mixtures of air and sterilising agent from leaking outside.
in correspondence with FIG. 1 this circuit uses a conveying means in the form of a fan 57 and a filter means 58 with heating coil 59 from which the sterile mixture of air and sterilising agent vapor enters the blowing device 15, 16 via a line 60. An indicating meter 62 is located in a line 61 between the separator 53 and the conveying means 57.
From the lowest point of the bottom 34, a ,line'63 branches off and is closed with the aid of a valve means such as a weighted flap 64. A weight 65 is adjusted in such a way that at a predetermined pressure, chamber atmosphere is blown off. Non-condensed portions are condensed with the aid of cold water fed into an injection condenser 67, through a line 68.
By a suitable dimensioning of the annular gap 51 in .the embodiment according to FIG. 2 a definite concentration of sterilising agent is once more maintained in the atmosphere of the chamber 14. For the preliminary sterilisation, the chamber 52 is subdivided into two annular spaces with the air of a wall 71 coaxial with the axis of the flexible tube, an electrical spiral heater 73' being located in the annular space 72 between wall 71 and tube 23. This heater 73 serves to volatilize the liquid sterilising agent depositing on the walls of the flexible tube during the preliminary sterilizing of the chamber 14. in this way sterilising agent having a corrosive action is prevented from entering the sensitive device' for producing the transverse welding seams.
FIG. 3 shows details 'of a suitable construction-for forming the gap betweenthe flexible tube 23 and the bottom of thesterile chamber. Here, cutting edges 82 are coaxial with the axis of the flexible tube 23 on the bottom 81 of the sterile chamber (not shown). On the cutting edges 82 rests a plate 83, whose bore 84 is dimensioned such that an annular gap 85 of predetermined width is formed between the tube and the bore 84. The plate 83 resting on the cutting edges 82 can follow small lateral movements of the tube 23.
The invention is not limited to the described embodi ments. in a further embodiment, the concentration of the chemical sterilising agent is limited in the chamber by a chemical'substance .or composition in the circuit,
e.g., metal fillings, which is able to bind or catalytically decompose the sterilising agent or an undesirable component of the same in such a way that no undesired concentration can arise in the chamber.
We claim:
1. In combination with an aseptic packaging machine having a sterile chamber in which a packaging material is formed into a flexible tube; an apparatus for control-- ling the atmosphere of said sterile chamber comprising a flow circuit including said sterile chamber for a flow of a mixture of chamber air and sterilizing agent vapor forming the chamber atmosphere, a conveying means in said flow circuit for recirculating the flow, throttle means between said chamber and said conveying means for generating an above-ambient pressure in said chamber, and means for limiting the concentration of the sterilizing agent in the atmosphere filling said chamber.
2. The combination as set forth in claim 1 which further comprises a discharge line connected to said chamber at a lower end thereof for discharging condensed sterilizing agent therefrom.
3. The combination as set forth in claim 1 which further comprises a liquid separator connected to said flow circuit between said chamber and said conveying means.
4. The combination as set forth in claim 1 which further comprises means in said flow circuit for sterilizing the flow passing from said conveying means into said sterile chamber.
5. The combination as set forth in claim 1 wherein said means for limiting said concentration includes a line connected to said flow circuit between said throttle means and said'conveying means for introducing surrounding air into said flow circuit.
6. The combination as set forth in claim 5 wherein said means for limiting said concentration further includes a line connected to said flow circuit upstream of said throttle means and an adjustable blow-off valve in said line for discharging the chamber atmosphere when a predetermined pressure is exceeded in said chamber.
7. The combination as set forth in claim '5 which further includes a flow meter in said line for indicating the amount of surrounding air introduced into said flow circuit through said line.
8. The combination as set forth in claim 1 wherein said means for limiting said concentration includes a second chamber in said flow circuit downstream of said throttle means for passage of the flexible tube therethrough, said second chamber having an open bottom to define a gap with the flexible tube for introducing surrounding air into said flow circuit.
9. The combination as set forth in claim 8 wherein said throttle means is a gap between an open bottom of a flow circuit including said sterile chamber for a flow of a mixture of chamber air and sterilizing agent vapor forming the chamber atmosphere,
a fan in said flow circuit for recirculating the flow,
throttle means between said chamber and said fan for generating an above-ambient pressure in said chamber, I
an adjustable blow-off valve connected to said flow circuit upstream of said throttle means to allow chamber atmosphere to discharge when a predetermined pressure is exceeded in said chamber, and r a line connected to said flow circuit between said throttle means and said conveying means for introducing surrounding air into said. flow circuit to replace the atmosphere discharged through said blow-off valve.
- 12. In combination with an aseptic packaging machine having a sterile chamber in which a packaging material is formed into a flexible tube; an apparatus for controlling the atmosphere of said sterile chamber comprising a flow circuit including said sterile chamber for a flow of a mixture of chamber air and sterilizing agent vapor forming the chamber atmosphere,
a conveying means in said flow circuit for recirculating the flow,
throttle means between said chamber and said con-- 13. The combination as set forth in claim 12 which further comprises a partition in said second chamber coaxially of the path of the flexible tube for subdividing said second chamber, and a heater within said partition for volatilizing liquid sterilizing agent on the outer surface of the flexible tube.

Claims (13)

1. In combination with an aseptic packaging machine having a sterile chamber in which a packaging material is formed into a flexible tube; an apparatus for controlling the atmosphere of said sterile chamber comprising a flow circuit including said sterile chamber for a flow of a mixture of chamber air and sterilizing agent vapor forming the chamber atmosphere, a conveying means in said flow circuit for recirculating the flow, throttle means between said chamber and said conveying means for generating an above-ambient pressure in said chamber, and means for limiting the concentration of the sterilizing agent in the atmosphere filling said chamber.
2. The combination as set forth in claim 1 which further comprises a discharge line connected to said chamber at a lower end thereof for discharging condensed sterilizing agent therefrom.
3. The combination as set forth in claim 1 which further comprises a liquid separator connected to said flow circuit between said chamber and said conveying means.
4. The combination as set forth in claim 1 which further comprises means in said flow circuit for sterilizing the flow passing from said conveying means into said sterile chamber.
5. The combination as set forth in claim 1 wherein said means for limiting said concentration includes a line connected to said flow circuit between said throttle means and said conveying means for introducing surrounding air into said flow circuit.
6. The combination as set forth in claim 5 wherein said means for limiting said concentration further includes a line connected to said flow circuit upstream of said throttle means and an adjustable blow-off valve in said line for discharging the chamber atmosphere when a predetermined pressure is exceeded in said chamber.
7. The combination as set forth in claim 5 which further includes a flow meter in said line for indicating the amount of surrounding air introduced into said flow circuit through said line.
8. The combination as set forth in claim 1 wherein said means for limiting said concentration includes a second chamber in said flow circuit downstream of said throttle means for passage of the flexible tube therethrough, said second chamber having an open bottom to define a gap with the flexible tube for introducing surrounding air into said flow circuit.
9. The combination as set forth in claim 8 wherein said throttle means is a gap between an open bottom of said sterile chamber and the flexible tube.
10. The combination as set forth in claim 8 which further includes a flow meter in said flow circuit between said throttle means and said conveying means.
11. In combination with an aseptic packaging machine having a sterile chamber in which a packaging material is formed into a flexible tube; and apparatus for controlling the atmosphere of said sterile chamber comprising a flow circuit including said sterile chamber for a flow of a mixture of chamber air and sterilizing agent vapor forming the chamber atmosphere, a fan in said flow circuit for recirculating the flow, throttle means between said chamber and said fan for generating an above-ambient pressure in said chamber, an adjustable blow-off valve connected to said flow circuit upstream of said throttle means to allow chamber atmosphere to discharge when a predetermined pressure is exceeded in said chamber, and a line connected to said flow circuit between said throttle means and said conveying means for introducing surrounding air into said flow circuit to replace the atmosphere discharged through said blow-off valve.
12. In combination with an aseptic packaging machine having a sterile chamber in which a packaging material is formed into a flexible tube; an apparatus for controlling the atmosphere of said sterile chamber comprising a flow circuit including said sterile chamber for a flow of a mixture of chamber air and sterilizing agent vapor forming the chamber atmosphere, a conveying means in said flow circuit for recirculating the flow, throttle means between said chamber and said conveying means for generating an above-ambient pressure in said chamber; a valve means connected to said sterile chamber for blowing off chamber atmosphere at a predetermined pressure thereof, and a second chamber in said flow circuit downstream of said throttle means for passage of the flexible tube therethrough, said second chamber having an open bottom to define a gap with the flexible tube for introducing surrounding air into said flow circuit to replace the atmosphere discharged through said valve means.
13. The combination as set forth in claim 12 which further comprises a partition in said second chamber coaxially of the path of the flexible tube for sub-dividing said second chamber, and a heater within said partition for volatilizing liquid sterilizing agent on the outer surface of the flexible tube.
US00269518A 1971-07-09 1972-07-07 Apparatus for controlling the atmosphere of the sterile chamber in an aseptic packaging machine Expired - Lifetime US3854874A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1009671A CH534613A (en) 1971-07-09 1971-07-09 Device for the aseptic packaging of sterile goods in packs which are formed from packaging material which is brought into contact with a chemically acting sterilizing liquid and then passed through the interior of a sterile chamber

Publications (1)

Publication Number Publication Date
US3854874A true US3854874A (en) 1974-12-17

Family

ID=4359304

Family Applications (1)

Application Number Title Priority Date Filing Date
US00269518A Expired - Lifetime US3854874A (en) 1971-07-09 1972-07-07 Apparatus for controlling the atmosphere of the sterile chamber in an aseptic packaging machine

Country Status (19)

Country Link
US (1) US3854874A (en)
JP (1) JPS5311910B1 (en)
AT (1) AT332308B (en)
BE (1) BE785982A (en)
BR (1) BR7204509D0 (en)
CA (1) CA952683A (en)
CH (1) CH534613A (en)
DK (1) DK137888B (en)
FI (1) FI53284C (en)
FR (1) FR2145527B1 (en)
GB (1) GB1375303A (en)
IT (1) IT962447B (en)
NL (1) NL152806B (en)
NO (1) NO133884C (en)
PH (1) PH10562A (en)
SE (1) SE391692B (en)
SU (1) SU431662A3 (en)
YU (1) YU35324B (en)
ZA (1) ZA724385B (en)

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3922835A (en) * 1973-10-11 1975-12-02 Altstaedter Verpack Vertrieb Apparatus for packaging under sterile conditions
US3947249A (en) * 1973-04-20 1976-03-30 Quepor S.A. Sterilizing device for web shaped packaging material
US4055035A (en) * 1975-04-07 1977-10-25 Ab Ziristor Method and an arrangement for the purification of air in packing machines
US4099914A (en) * 1975-11-28 1978-07-11 Ab Ziristor Method and an arrangement for the sterilization of packing material
US4169123A (en) * 1975-12-11 1979-09-25 Moore-Perk Corporation Hydrogen peroxide vapor sterilization method
US4169124A (en) * 1977-09-26 1979-09-25 Moore-Perk Corporation Cold gas sterilization process
US4225556A (en) * 1976-10-07 1980-09-30 Tetra Pak International Ab Method and apparatus for the sterilizing of a packing material web
US4230663A (en) * 1979-07-10 1980-10-28 Moore-Perk Corporation Cold gas sterilization process using hydrogen peroxide at low concentrations
US4366125A (en) * 1979-11-27 1982-12-28 Dai Nippon Insatsu Kabushiki Kaisha Sterilization apparatus and process utilizing synergistic effect of combining hydrogen peroxide and ultra-violet-ray sterilization
US4391080A (en) * 1979-09-20 1983-07-05 The Mead Corporation Method for providing an inert sterile atmosphere in an aseptic packaging machine
US4512951A (en) * 1980-12-30 1985-04-23 American Sterilizer Company Hydrogen peroxide liquid film sterilization method
US5044140A (en) * 1989-04-10 1991-09-03 Shikoku Kakoki Co., Ltd. Packaging machine
US5489783A (en) * 1993-04-28 1996-02-06 Tetra Laval Holdings & Finance S.A. Electron accelerator for sterilizing packaging material in an aspetic packaging machine
US5569438A (en) * 1991-07-17 1996-10-29 Tetra Laval Holdings & Finance S.A. Apparatus for sterilizing a continuous packaging material web
US5671588A (en) * 1995-09-08 1997-09-30 Owens-Illinois Labels Inc. Method and apparatus for applying carriers to containers
US5858040A (en) * 1997-03-28 1999-01-12 Tetra Laval Holdings & Finance, Sa Filling machine having a microfiltrated clean air supply system
WO2001002249A1 (en) * 1999-07-07 2001-01-11 Tetra Laval Holdings & Finance S.A. Filling machine provided with flushing device
US6354061B1 (en) * 1999-05-03 2002-03-12 Tetra Laval Holdings & Finance S.A. Unit for sterilizing strip material on a packaging machine
WO2003008274A1 (en) * 2001-06-21 2003-01-30 The Coca-Cola Company Apparatus for sterilizing web material in a form-fill-seal machine
WO2003039966A1 (en) * 2001-11-07 2003-05-15 Hassia Verpackungsmaschinen Gmbh Method for presterilizing a tubular pouch packing machine
US20050076612A1 (en) * 2002-02-08 2005-04-14 Jan Andersson Unit for sterilizing web-feb material on a machine for packaging pourable food products
EP1795448A1 (en) * 2005-12-12 2007-06-13 Tetra Laval Holdings & Finance SA Air processing circuit for a sterilizing unit for sterilizing sheet packaging materials for packaging pourable food products, and sterilizing unit featuring such a circuit
US20100077701A1 (en) * 2007-03-30 2010-04-01 Ehmer Wilfried Method and apparatus for preparing and filling packages including pouches and containers, such as pouches and containers for food products
US20110185686A1 (en) * 2008-05-11 2011-08-04 Tetra Laval Holdings & Finance S.A. Packaging and filling machine
US20140196407A1 (en) * 2011-10-03 2014-07-17 Tetra Laval Holdings & Finance S.A. Packaging machine and method for producing sealed packages of a food product from a web of a packaging material
DE102015213051A1 (en) 2015-07-13 2017-01-19 Zott Se & Co. Kg UNIT FOR DISINFECTION OF PACKAGING MATERIALS, PACKAGING MACHINE AND CORRESPONDING METHOD
US10875675B2 (en) * 2017-09-13 2020-12-29 Tetra Laval Holdings & Finance S.A. Packaging apparatus for forming sealed packages
CN113165763A (en) * 2018-11-26 2021-07-23 利乐拉瓦尔集团及财务有限公司 Method and packaging device for forming sealed packages
US11230399B2 (en) * 2018-10-10 2022-01-25 Jbt Food & Dairy Systems B.V. Stick filler pipe with integral sterilization
DE102015017204B3 (en) 2015-07-13 2022-01-27 Zott Se & Co. Kg Unit for disinfecting packaging materials, packaging machine and related procedure
US11548238B2 (en) 2018-09-10 2023-01-10 Tetra Laval Holdings & Finance S.A. Method for forming a tube and a method and a packaging machine for forming a package
US11554555B2 (en) 2017-05-30 2023-01-17 Tetra Laval Holdings & Finance S.A. Apparatus for sealing the top of a package for a food product and system for forming and filling a food package
US11572207B2 (en) * 2018-11-26 2023-02-07 Tetra Laval Holdings & Finance S.A. Packaging apparatus for forming sealed packages
US11820540B2 (en) * 2018-09-11 2023-11-21 Tetra Laval Holdings & Finance S.A. Packaging apparatus for forming sealed packages

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5829876U (en) * 1981-08-19 1983-02-26 ソニー株式会社 Structure of assembled parts
JP3785512B2 (en) * 1996-06-24 2006-06-14 四国化工機株式会社 Method for sterilizing chamber in packaging machine
JPH10114312A (en) * 1996-10-07 1998-05-06 Shikoku Kakoki Co Ltd Web sterilizing device
DK0968923T3 (en) * 1998-06-30 2004-06-07 Tetra Laval Holdings & Finance Packaging material sterilizer for a pourable food packaging machine
BR112014031720A2 (en) * 2012-07-17 2017-06-27 Tetra Laval Holdings & Finance sterilization chamber, and method for sterilizing a continuous strip of packaging material

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3019197A (en) * 1949-10-07 1962-01-30 Charles E Saunders Catalyst for the decomposition of hydrogen peroxide and method of preparing said catalyst
US3692468A (en) * 1969-07-29 1972-09-19 Alpura Ag Apparatus for sterilizing packaged material
US3695220A (en) * 1969-03-20 1972-10-03 Rimar Spa Apparatus for finishing textile materials and the like

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3019197A (en) * 1949-10-07 1962-01-30 Charles E Saunders Catalyst for the decomposition of hydrogen peroxide and method of preparing said catalyst
US3695220A (en) * 1969-03-20 1972-10-03 Rimar Spa Apparatus for finishing textile materials and the like
US3692468A (en) * 1969-07-29 1972-09-19 Alpura Ag Apparatus for sterilizing packaged material

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3947249A (en) * 1973-04-20 1976-03-30 Quepor S.A. Sterilizing device for web shaped packaging material
US3922835A (en) * 1973-10-11 1975-12-02 Altstaedter Verpack Vertrieb Apparatus for packaging under sterile conditions
US4055035A (en) * 1975-04-07 1977-10-25 Ab Ziristor Method and an arrangement for the purification of air in packing machines
US4099914A (en) * 1975-11-28 1978-07-11 Ab Ziristor Method and an arrangement for the sterilization of packing material
US4169123A (en) * 1975-12-11 1979-09-25 Moore-Perk Corporation Hydrogen peroxide vapor sterilization method
US4225556A (en) * 1976-10-07 1980-09-30 Tetra Pak International Ab Method and apparatus for the sterilizing of a packing material web
US4169124A (en) * 1977-09-26 1979-09-25 Moore-Perk Corporation Cold gas sterilization process
US4230663A (en) * 1979-07-10 1980-10-28 Moore-Perk Corporation Cold gas sterilization process using hydrogen peroxide at low concentrations
US4391080A (en) * 1979-09-20 1983-07-05 The Mead Corporation Method for providing an inert sterile atmosphere in an aseptic packaging machine
US4366125A (en) * 1979-11-27 1982-12-28 Dai Nippon Insatsu Kabushiki Kaisha Sterilization apparatus and process utilizing synergistic effect of combining hydrogen peroxide and ultra-violet-ray sterilization
US4512951A (en) * 1980-12-30 1985-04-23 American Sterilizer Company Hydrogen peroxide liquid film sterilization method
US5044140A (en) * 1989-04-10 1991-09-03 Shikoku Kakoki Co., Ltd. Packaging machine
US5569438A (en) * 1991-07-17 1996-10-29 Tetra Laval Holdings & Finance S.A. Apparatus for sterilizing a continuous packaging material web
US5489783A (en) * 1993-04-28 1996-02-06 Tetra Laval Holdings & Finance S.A. Electron accelerator for sterilizing packaging material in an aspetic packaging machine
US5671588A (en) * 1995-09-08 1997-09-30 Owens-Illinois Labels Inc. Method and apparatus for applying carriers to containers
US5858040A (en) * 1997-03-28 1999-01-12 Tetra Laval Holdings & Finance, Sa Filling machine having a microfiltrated clean air supply system
US6354061B1 (en) * 1999-05-03 2002-03-12 Tetra Laval Holdings & Finance S.A. Unit for sterilizing strip material on a packaging machine
US6666002B1 (en) 1999-07-07 2003-12-23 Tetra Laval Holdings & Finance S.A. Filling machine provided with flushing device
WO2001002249A1 (en) * 1999-07-07 2001-01-11 Tetra Laval Holdings & Finance S.A. Filling machine provided with flushing device
WO2003008274A1 (en) * 2001-06-21 2003-01-30 The Coca-Cola Company Apparatus for sterilizing web material in a form-fill-seal machine
WO2003039966A1 (en) * 2001-11-07 2003-05-15 Hassia Verpackungsmaschinen Gmbh Method for presterilizing a tubular pouch packing machine
US20040011004A1 (en) * 2001-11-07 2004-01-22 Gunter Kurth Method for presterilizing a tubular pouch packing machine
US6804936B2 (en) 2001-11-07 2004-10-19 Hassia Verpackungsmaschinen Gmbh Method for presterilizing a tubular pouch packing machine
US20050076612A1 (en) * 2002-02-08 2005-04-14 Jan Andersson Unit for sterilizing web-feb material on a machine for packaging pourable food products
US7093405B2 (en) * 2002-02-08 2006-08-22 Tetra Laval Holdings & Finance S.A. Unit for sterilizing web-fed material on a machine for packaging pourable food products
EP1795448A1 (en) * 2005-12-12 2007-06-13 Tetra Laval Holdings & Finance SA Air processing circuit for a sterilizing unit for sterilizing sheet packaging materials for packaging pourable food products, and sterilizing unit featuring such a circuit
US9290286B2 (en) * 2007-03-30 2016-03-22 Khs Gmbh Method and apparatus for preparing and filling packages including pouches and containers, such as pouches and containers for food products
US20100077701A1 (en) * 2007-03-30 2010-04-01 Ehmer Wilfried Method and apparatus for preparing and filling packages including pouches and containers, such as pouches and containers for food products
US8943786B2 (en) * 2008-05-11 2015-02-03 Tetra Laval Holdings & Finance S.A. Packaging and filling machine
US20110185686A1 (en) * 2008-05-11 2011-08-04 Tetra Laval Holdings & Finance S.A. Packaging and filling machine
US9637260B2 (en) * 2011-10-03 2017-05-02 Tetra Laval Holdings & Finance S.A. Packaging machine and method for producing sealed packages of a food product from a web of a packaging material
US20140196407A1 (en) * 2011-10-03 2014-07-17 Tetra Laval Holdings & Finance S.A. Packaging machine and method for producing sealed packages of a food product from a web of a packaging material
DE102015213051B4 (en) * 2015-07-13 2017-12-14 Zott Se & Co. Kg UNIT FOR DISINFECTION OF PACKAGING MATERIALS, PACKAGING MACHINE AND CORRESPONDING METHOD
DE102015213051A1 (en) 2015-07-13 2017-01-19 Zott Se & Co. Kg UNIT FOR DISINFECTION OF PACKAGING MATERIALS, PACKAGING MACHINE AND CORRESPONDING METHOD
DE102015017204B3 (en) 2015-07-13 2022-01-27 Zott Se & Co. Kg Unit for disinfecting packaging materials, packaging machine and related procedure
US11554555B2 (en) 2017-05-30 2023-01-17 Tetra Laval Holdings & Finance S.A. Apparatus for sealing the top of a package for a food product and system for forming and filling a food package
US10875675B2 (en) * 2017-09-13 2020-12-29 Tetra Laval Holdings & Finance S.A. Packaging apparatus for forming sealed packages
US11548238B2 (en) 2018-09-10 2023-01-10 Tetra Laval Holdings & Finance S.A. Method for forming a tube and a method and a packaging machine for forming a package
US11820540B2 (en) * 2018-09-11 2023-11-21 Tetra Laval Holdings & Finance S.A. Packaging apparatus for forming sealed packages
US11230399B2 (en) * 2018-10-10 2022-01-25 Jbt Food & Dairy Systems B.V. Stick filler pipe with integral sterilization
CN113165763A (en) * 2018-11-26 2021-07-23 利乐拉瓦尔集团及财务有限公司 Method and packaging device for forming sealed packages
US11572207B2 (en) * 2018-11-26 2023-02-07 Tetra Laval Holdings & Finance S.A. Packaging apparatus for forming sealed packages

Also Published As

Publication number Publication date
SE391692B (en) 1977-02-28
IT962447B (en) 1973-12-20
DK137888C (en) 1978-10-30
DK137888B (en) 1978-05-29
FI53284B (en) 1977-12-30
AU4409672A (en) 1974-01-03
AT332308B (en) 1976-09-27
DE2136934A1 (en) 1973-01-18
FR2145527A1 (en) 1973-02-23
NO133884B (en) 1976-04-05
FR2145527B1 (en) 1980-03-14
ZA724385B (en) 1973-03-28
DE2136934B2 (en) 1973-05-17
CA952683A (en) 1974-08-13
NL152806B (en) 1977-04-15
JPS5311910B1 (en) 1978-04-25
NL7111276A (en) 1973-01-11
SU431662A3 (en) 1974-06-05
PH10562A (en) 1977-06-28
YU35324B (en) 1980-12-31
ATA572872A (en) 1975-12-15
BE785982A (en) 1972-11-03
FI53284C (en) 1978-04-10
CH534613A (en) 1973-03-15
BR7204509D0 (en) 1973-05-17
NO133884C (en) 1976-07-14
GB1375303A (en) 1974-11-27
YU179372A (en) 1980-06-30

Similar Documents

Publication Publication Date Title
US3854874A (en) Apparatus for controlling the atmosphere of the sterile chamber in an aseptic packaging machine
US3383831A (en) Web sterilization and package forming apparatus
US4742667A (en) Method of and apparatus for sterilizing packaging material, especially container-type packages
KR960010578B1 (en) Method of producing a gaseous hydrogen peroxide-containing sterilization fluid
US5879648A (en) Apparatus for disinfecting containers
US4631173A (en) Method of sterilizing packaging material, especially container-type packages
JP2004524085A (en) Vapor phase decontamination of containers
EP0643589B1 (en) Barrier isolation system
GB1582060A (en) Sterilisation
JPH0364141B2 (en)
CA1039921A (en) Method and an arrangement for the purification of air in packing machines
JPH0566142B2 (en)
CA1292416C (en) Apparatus for removing liquid and residue from a web of film
KR20010033071A (en) A continuous process for hyperactivation of fluids for sterilization
CA3022136C (en) Sterile packaging of fluent materials
US2771645A (en) Apparatus for sterilizing food containers
DE2136933C3 (en) Device for the aseptic packaging of sterile goods in packs which are formed from material in web form
EP0085656A2 (en) Process & plant for endless-cycle sterilization of sheet material utilized in aseptic packaging of pre-sterilized fluid products
US4888155A (en) Apparatus for sterilizing film and like packaging material
EP0062929A2 (en) Aseptic packaging method and apparatus
JPH0455936B2 (en)
JP2693228B2 (en) Method and apparatus for pretreatment of moving web material
US3761224A (en) Method and apparatus for continuous ehtylene oxide sterilization
JP3898290B2 (en) Method and apparatus for producing sterilizing air containing hydrogen peroxide
JPH09328113A (en) Sterilizing method for aseptic region, and device therefor