GB2618095A - Sealing apparatus and method - Google Patents

Sealing apparatus and method Download PDF

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Publication number
GB2618095A
GB2618095A GB2206056.0A GB202206056A GB2618095A GB 2618095 A GB2618095 A GB 2618095A GB 202206056 A GB202206056 A GB 202206056A GB 2618095 A GB2618095 A GB 2618095A
Authority
GB
United Kingdom
Prior art keywords
roller
induction heater
nip forming
heat
nip
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.)
Pending
Application number
GB2206056.0A
Other versions
GB202206056D0 (en
Inventor
Day Gary
Robinson Gary
Cryer Jason
Williams Luke
Crowder Philip
Wadsworth Luke
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.)
Sewtec Automation Ltd
Original Assignee
Sewtec Automation Ltd
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 Sewtec Automation Ltd filed Critical Sewtec Automation Ltd
Priority to GB2206056.0A priority Critical patent/GB2618095A/en
Publication of GB202206056D0 publication Critical patent/GB202206056D0/en
Priority to GB2219010.2A priority patent/GB2618175A/en
Priority to PCT/EP2023/060730 priority patent/WO2023208886A1/en
Publication of GB2618095A publication Critical patent/GB2618095A/en
Pending legal-status Critical Current

Links

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
    • B65B29/00—Packaging of materials presenting special problems
    • B65B29/02—Packaging of substances, e.g. tea, which are intended to be infused in the package
    • B65B29/025—Packaging of substances, e.g. tea, which are intended to be infused in the package packaging infusion material into pods
    • 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/16—Applying or generating heat or pressure or combinations thereof by rotary members
    • 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
    • B65B47/00—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved
    • 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/22—Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding
    • B65B51/227—Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding by induction welding
    • 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/28—Rollers for producing longitudinal and transverse seams simultaneously
    • 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • B65B51/306—Counter-rotating devices
    • 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
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • 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
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
    • B65B9/023—Packaging fluent material

Abstract

A sealing apparatus comprising a first roller 10 and a second counterrotating roller 12 arranged to form at least one nip zone 11 therebetween for applying pressure to a sealing region of web material 21, 22 guided through the at least one nip zone. At least one induction heater element 16, 17 is arranged to apply heat generating energy at least to one of the first roller and the second roller for heating the sealing region of the web material in the at least one nip zone. The induction heater element may comprise an induction heater coil wound such that it is split into distinct annular induction heater members aligning with respective nip forming formations on the roller. The apparatus may be configured to form sealed bags containing material. there may be a second induction heater element associated with the second roller. The apparatus may comprise a controller and therein connected heat sensor arrangement, the controller being configured to control generation of heat energy by the induction heater element. Also a method of use of the sealing apparatus.

Description

Sealing apparatus and method This disclosure relates to apparatuses and methods for sealing streams of film, and more particularly sealing web material using pressure and heat.
Streams of film can be sealed for various purposes. For example, layers of web material can be bonded together by pressure between counter rotating sealing drums. Another example is production of pouches or bags of beverage material, for example tea. The pouches can be manufactured by sealing two layers of tissue web together between sealing dyes provided on counter rotating drums.
Heat can be used for the sealing together with the pressure in a nip between the drums. Heat activated agent can be applied on the seam to bond the layers of the web material together. A solution is to heat the material in the nip using infrared heater elements. In industrial processes large quantities of web material can be guided through the nip at a considerable speed. Considerable amounts of energy may need to be used for the generation of heat for such high speed sealing operation.
According to an aspect, there is provided a sealing apparatus comprising a first roller and a second counterrotating roller arranged to form at least one nip zone therebetween for applying pressure to a sealing region of web material guided through the at least one nip zone, and at least one induction heater element arranged to apply heat generating energy to the first roller and/or the second roller for heating the sealing region of the web material in the at least one nip zone.
According to a more specific aspect the at least one induction heater element is arranged to direct the heat generating energy to a nip forming formation of the first roller and/or a nip forming formation of the second roller.
A sealing apparatus may comprise at least one annular induction heater member arranged within the first roller and/or the second roller in alignment with a respective nip forming formation on the circumference of the first roller and/or the second roller for directing heat generating energy to the nip forming formation. At least one induction heater element may comprise an induction heater coil wound such that it is split into distinct annular induction heater members that align with the respective nip forming formations on the roller.
A sealing apparatus may comprise at least one circumferential nip forming formation and at least one non-circumferential nip forming formation on the surface of at least one of the rollers. Heating of the at least one non-circumferential nip forming formation can be arranged through heat from adjacent at least one circumferential nip forming formation. The mass of the non-circumferential nip forming formation may be less than is the mass of the adjacent at least one circumferential nip forming formation. At least one induction heater member may be provided between lo circumferential nip forming formations.
A sealing apparatus may be configured to produce sealed bags containing material. A sealing apparatus may be configured to seal bags containing one of biomaterial, substance for preparing beverage, food substance, spices, scent, colouring agent, washing powder, and/or medicament.
In accordance with an aspect at least one first induction heater element is arranged in association with the first roller and at least one second induction heater element is arranged in association with the second roller.
At least one induction heater element can be provided for generating heat for a bonding agent on the web material.
A sealing apparatus may comprise a controller and therein connected heat sensor arrangement. The controller can be configured to control generation of heat energy by at least one induction heater element based on information from the heat sensor arrangement.
In accordance with another aspect there is provided a method of sealing web material, the method comprising applying pressure to a sealing region of the web material passing through at least one nip zone formed between a first roller and a counterrotating second roller and applying heat generating energy from at least one induction heater to the first roller and/or the second roller for heating the sealing region of the web material in the at least one nip zone.
The method may comprise directing heat generating energy from the at least one induction heater element to a nip forming formation of the first roller and/or the second roller.
The method may comprise directing heat generating energy to the at least one nip zone by at least one annular induction heater member arranged within the first roller and/or the second roller in alignment with a respective nip forming formation on the circumference of the first roller and/or the second roller.
The method may comprise heating at least one nip forming formation through heat transferred from adjacent at least one another nip forming formation.
The method may comprise heating at least one non-circumferential nip forming formation on the surface through heat generated in at least one circumferential nip forming formation.
The method may comprise producing sealed bags containing material.
The method may comprise heating both rollers by respective induction heater 15 elements.
The method may comprise controlling local generation of heat energy by the at least one induction heater element based on information from a heat sensor arrangement.
A computer software product may be used for controlling the operation of at zo least a part of the herein described sealing apparatus and implementing the method.
Some aspects will now be described in further detail, by way of example only, with reference to the following examples and accompanying drawings, in which: Figures 1 and 2 illustrate side and front views of a schematic example of a sealing apparatus; Figure 3 is a perspective view of another example of sealing rollers; Figure 4 a flowchart for operation according to an example; and Figure 5 is an example of a control arrangement.
The following description gives an exemplifying description of some possibilities to practise the invention. Although the specification may refer to "an", "one", or "some" examples or embodiment(s) in several locations of the text, this does not necessarily mean that each reference is made to the same example of embodiment(s), or that a particular feature only applies to a single example or embodiment. Single features of different examples and embodiments may also be combined to provide other embodiments.
Figures 1 and 2 are schematic presentations of an apparatus 1 comprising a pair of counterrotating crimp rollers or drums 10, 12 forming weld seaming lo arrangement comprising narrow nip zones 11 therebetween. The crimp rollers 10, 12 can be made from appropriate material such as steel. The rollers are arranged for pressing together at least two streams of film / web material 21, 22 guided through the nips to form a ply joined film 20. The direction of movement of the web material streams 21, 22 through the nip zone 11 is indicated by arrow 2.
As shown by Figure 2, the crimp rollers 10, 12 comprise circumferential sealing rims or bands 13 arranged to provide narrow nip zones for pressing the two streams of film 21 and 22 together. In the specific example three narrow nip zones are formed between the rollers by the sealing bands 13 with a larger diameter than is the diameter of the "free" sections 14 of the rollers 10 and 12 between the sealing bands.
In Figure 2 continuous sealing pressure is generated on the edges and the middle of the web material but other number, location and formation of sealing bands is also possible. It shall be appreciated that that less or more than three nip zones may be provided between a pair of crimp rollers. Also, the sealing does not need to extend only lengthwise along the web material, or lengthwise at all. For example, the rollers may comprise cooperative dye patterns on the drum faces thereof to produce seams extending in desired directions and formations. An example of a dye formation is given in Figures.
The rollers are supported on appropriate bearings mounted on a frame structure and rotated by a drive arrangement. These are well known in the art of rotatable apparatuses and are therefore not shown for clarity.
Heat activated bonding material or sealing membrane can be used for bonding the web material layers 21 and 22 together. The bonding material can be carried to the nip on the material. The bonding material can be provided on both layers of the film. It is also possible to have bonding material on the side of only one of the film layers. An example of bonding agents that is suitable for sealing tissue web materials such as tea bag material is polyactic acid (PLA).
To activate the bonding agent the rollers 10 and 12 can be provided with induction heater elements arranged to generate heat in the nip zones. Figure 1 shows induction heater elements comprising annular induction coils 16 and 17. Figure 2 lo shows by dashed lines how the induction coil elements 16 and 17 can be arranged inside the roller drums 10, 12 such that the induction coil elements are aligned with the annular sealing bands 13 on the rollers. By such arrangement the heat can be efficiently generated in the sealing bands 13 while energy is not unnecessarily applied to the area of the free zones 14 between the sealing bands. The heated sealing bands 13 provide heat in the nip zones 11 to heat bonding agent at the web layers 21,22 passing through the nip zones.
Induction heating is based on a process where electrically conductive materials like metals are heated by electromagnetic induction using induction coils that create an electromagnetic field within the coil. A feature of the induction heating process is that the heat is generated inside the heated material itself, instead of by an external heat source via heat conduction. Because of this the rollers, and more particularly the sealing bands 13 can be heated rapidly and efficiently at the location of the bands. An induction heater element comprises an electromagnet and an electronic oscillator that passes a high-frequency alternating current (AC) through the electromagnet. The rapidly alternating magnetic field generated by the induction heater element, indicated by the arrows from the coils 16 and 17 in Figure 1, penetrates the material of the rollers to be heated. The magnetic field generates electric currents (eddy currents) inside the roller material acting as conductor. The eddy currents flow through the resistance of the material and heat it by Joule heating. In ferromagnetic and ferrimagnetic materials, such as iron and steel, heat can also be generated by magnetic hysteresis losses. The frequency of the electric current used for induction heating can be selected depending on the object size, material type, coupling between the induction coil and the object to be heated and penetration depth.
The induction heater elements can be mounted in fixed position and the rollers can rotate around them. For example, the induction heater elements can be mounted on a fixed shaft and the roller can be rotated around the shaft and the elements on an appropriate bearing and drive arrangement.
The induction coil bands of Figure 2 can be balanced to achieve optimum heat distribution across the drum face. Heat distribution / balancing can be controlled in during operation of the apparatus. In accordance with an example shown in Figure 5 surface temperature monitoring of the rollers is provided via sensors 60 such as optical pyrometers on each roller 10, 12. The monitoring arrangement provides feedback via link 61 to a controller 50 of the induction heating system adapted to control the coils 16, 17 via its internal electronics and software parameters. This enables quick reaction and adjustment of power supplied via power lines 66 to the induction heater elements by a power unit 64 in response to any detected imbalance. One induction coil may be provided per a roller or drum. Each coil can be wound in such a way that it is split into distinct sections or bands that align to the sealing seams 13 on the drums. Such arrangement requires only one input and one return per drum.
An induction heating system or part there such as the heater elements, a generator and/or a controller may require a cooling arrangement. Such can be provided, for example, by means of a liquid cooling system or an air-cooling system. The sealing apparatus can be configured to produce closed bags containing a 25 variety of materials. The material to be bagged can be any substance. The bags can contain, for example, one of biomaterial, substance for preparing beverage, food substance, spices, scent, colouring agent, washing powder, medicament or the like. These examples are not an exhaustive list of possible materials.
Figure 3 shows an example where rollers 10 and 12 comprise cooperative dies 32 for producing sealed bags. Individual bands, on the coil inside the drum, can be positioned where the annular weld seam band is on the sealing roller and the product. In the example bag sealing apparatus the rollers 10, 12 are configured to provide square dies. Heating bands (rings) on the coils are aligned with the annular bands 30 proving the longitudinal seals of the bags ("longitudinal" nip 33). The lateral bands 31 going across the rollers provide a "lateral nip 34 for producing the fully sealed bag shape.
The lateral bands 31 between the longitudinal bands 30 can have reduced mass per length compared to the longitudinal bands. This enables arrangement where no direct coil band alignment is necessary for this part of the dye on the drum lo as sufficient amount of heat transfers from the longitudinal bands to the lateral band for affecting the bonding. Direct induction heating on extended lateral surfaces can be achieved through additional longitudinal induction heater bands at a midpoint of the lateral bands on the surface to be heated.
Figure 4 shows a flowchart according to an example for a method of sealing web material. In the method web material is passed through at least one nip zone formed between a first roller and a counterrotating second roller at 100. Pressure is applied at 102 to a sealing region of the web material passing through the at least one nip zone. At the same time the sealing region of the web material in the at least one nip zone is heated by application of heat generating energy from at least one induction heater element at 104.
In accordance with an example each roller is provided with at least one induction heater coil.
The heat generating energy can be directed accurately from the at least one induction heater element to a nip forming formation of the first roller and/or the second roller while the surrounding regions are not heated. The heat generating energy can be directed to the at least one nip zone by at least one annular induction heater member arranged within the first roller and/or the second roller in alignment with a respective nip forming formation on the circumference of the first roller and/or the second roller. In accordance with a possibility at least one nip forming formation is heated through heat transferred from adjacent at least one another nip forming formation.
The operation of the seaming apparatus, the induction heating elements and any auxiliary devices can be controlled by a control apparatus. An example of such is shown in Figure 5. The control apparatus 50 can comprise at least one data processor 52, 53 and at least one memory 51 and an interface 54. The control apparatus can control features such as amount of heat applied to the web material, distribution of heat on the sealing bands, machine speed and so on. The power unit 64 controlled via link 62 can feed power to the induction heater elements via the power lines 66 accordingly. The control can be based on information received via link 61 from various sensor equipment, for example heat sensors 60. The induction heater elements are advantageous in providing a fast and accurately reacting control arrangement. In the example of Figures 1 and 2 the annular induction coils 16 and 17 are configured as internal elements to the drums. Different configurations and assemblies of the heater elements are also possible. For example, the size and/or construction of the rollers may not facilitate use of internal induction heating elements, and the elements may be provided externally to the rollers.
In accordance with a possibility an induction heater element is arranged to heat only one of the drums.
Nips may be provided by having rims or other outwardly extending formations on the surface of only one of the rollers.
It is noted that although the above detailed examples have been described with reference to certain processes, applications and apparatuses there are several variations and modifications which may be made to the disclosed solution without departing from the scope of the present invention. In particular, the different embodiments have been described as examples. Different features from different embodiments may be combined. The foregoing description provides by way of exemplary and non-limiting examples a full and informative description of exemplary embodiments of the invention. However, various modifications and adaptations may become apparent to those skilled in the relevant arts in view of the foregoing description, when read in conjunction with the accompanying drawings and the appended claims. All such and similar modifications of the teachings of this invention will still fall within the spirit and scope of this invention.

Claims (20)

  1. Claims 1. A sealing apparatus comprising: a first roller and a second counterrotating roller arranged to form at least one nip zone therebetween for applying pressure to a sealing region of web material guided through the at least one nip zone, and at least one induction heater element arranged to apply heat generating energy to the first roller and/or the second roller for heating the sealing region of the web material in the at least one nip zone.
  2. 2. The sealing apparatus of claim 1, wherein the at least one induction heater element is arranged to direct the heat generating energy to a nip forming formation of the first roller and/or the second roller.
  3. 3. The sealing apparatus of claim 1 or 2, comprising at least one annular induction heater member arranged within the first roller and/or the second roller in alignment with a respective nip forming formation on the circumference of the first roller and/or the second roller for directing heat generating energy to the nip forming formation.
  4. 4. The sealing apparatus of claim 3, wherein the at least one induction heater element comprises an induction heater coil wound such that it is split into distinct annular induction heater members that align with the respective nip forming formations on the roller.
  5. 5. The sealing apparatus of any preceding of claim, comprising at least one circumferential nip forming formation and at least one non-circumferential nip forming formation on the surface of at least one of the rollers, wherein heating of the at least one non-circumferential nip forming formation is arranged through heat from adjacent at least one circumferential nip forming formation.
  6. 6. The sealing apparatus of claim 5, wherein the mass of the non-circumferential nip forming formation is less than the mass of the adjacent at least one circumferential nip forming formation.
  7. 7. The sealing apparatus of claim 5 or 6, comprising at least one induction heater member between circumferential nip forming formations.
  8. 8. The sealing apparatus of any preceding claim configured to produce sealed bags containing material.
  9. 9. The sealing apparatus of claim 8, configured to seal bags containing one of biomaterial, substance for preparing beverage, food substance, spices, scent, colouring agent, washing powder, and/or medicament.
  10. 10. The sealing apparatus of any preceding claim, wherein at least one first induction heater element is arranged in association with the first roller and at least one second induction heater element is arranged in association with the second roller.
  11. 11. The sealing apparatus of any preceding claim, wherein the at least one induction heater element is provided for generating heat for a bonding agent on the web material.
  12. 12. The sealing apparatus of any preceding claim, comprising a controller and therein connected heat sensor arrangement, wherein the controller is configured to control generation of heat energy by the at least one induction heater element based on information from the heat sensor arrangement.
  13. 13. A method of sealing web material, the method comprising: applying pressure to a sealing region of the web material passing through at least one nip zone formed between a first roller and a counterrotating second roller, and applying heat generating energy from at least one induction heater to the first roller and/or the second roller for heating the sealing region of the web material in the at least one nip zone.
  14. 14. The method of claim 13, comprising directing the heat generating energy from the at least one induction heater element to a nip forming formation of the first roller and/or the second roller.
  15. 15. The method of claim 13 or 14, comprising directing the heat generating energy to the at least one nip zone by at least one annular induction heater member arranged within the first roller and/or the second roller in alignment with a respective nip forming formation on the circumference of the first roller and/or the second roller.
  16. 16. The method of any of claims 13 to 15, comprising heating at least one nip forming formation through heat transferred from adjacent at least one another nip forming formation.
  17. 17. The method of claim 16, comprising heating at least one non-circumferential nip forming formation on the surface through heat generated in at least one circumferential nip forming formation.
  18. 18. The method of any of claims 13 to 17, comprising producing sealed bags containing material.
  19. 19. The method of any of claims 13 to 18, comprising heating both rollers by respective induction heater elements.
  20. 20. The method of any of claims 13 to 19, comprising controlling local generation of heat energy by the at least one induction heater element based on information from a heat sensor arrangement.
GB2206056.0A 2022-04-26 2022-04-26 Sealing apparatus and method Pending GB2618095A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB2206056.0A GB2618095A (en) 2022-04-26 2022-04-26 Sealing apparatus and method
GB2219010.2A GB2618175A (en) 2022-04-26 2022-12-16 Sealing apparatus and method
PCT/EP2023/060730 WO2023208886A1 (en) 2022-04-26 2023-04-25 Sealing apparatus and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2206056.0A GB2618095A (en) 2022-04-26 2022-04-26 Sealing apparatus and method

Publications (2)

Publication Number Publication Date
GB202206056D0 GB202206056D0 (en) 2022-06-08
GB2618095A true GB2618095A (en) 2023-11-01

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GB2206056.0A Pending GB2618095A (en) 2022-04-26 2022-04-26 Sealing apparatus and method
GB2219010.2A Pending GB2618175A (en) 2022-04-26 2022-12-16 Sealing apparatus and method

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0731027A1 (en) * 1995-03-10 1996-09-11 AZIONARIA COSTRUZIONI MACCHINE AUTOMATICHE-A.C.M.A.-S.p.A. A method and equipment for securing the joined edges of a heat-sealable film material in wrapping machines
US20020020505A1 (en) * 2000-07-18 2002-02-21 Martin Hohnhorst Device for heat sealing
US20130299092A1 (en) * 2012-05-14 2013-11-14 Uhlmann Pac-Systeme Gmbh & Co. Kg Device for roll-sealing sheets
EP3228549A1 (en) * 2014-12-02 2017-10-11 Nisshin Seifun Group Inc. Horizontal pillow packaging apparatus and horizontal pillow packaging method
US20210130067A1 (en) * 2007-04-12 2021-05-06 Sealed Air Corporation (Us) Apparatus and Method for Making Inflated Articles

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546433A (en) * 1969-02-25 1970-12-08 Electronic Control Systems Inc Roll heater device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0731027A1 (en) * 1995-03-10 1996-09-11 AZIONARIA COSTRUZIONI MACCHINE AUTOMATICHE-A.C.M.A.-S.p.A. A method and equipment for securing the joined edges of a heat-sealable film material in wrapping machines
US20020020505A1 (en) * 2000-07-18 2002-02-21 Martin Hohnhorst Device for heat sealing
US20210130067A1 (en) * 2007-04-12 2021-05-06 Sealed Air Corporation (Us) Apparatus and Method for Making Inflated Articles
US20130299092A1 (en) * 2012-05-14 2013-11-14 Uhlmann Pac-Systeme Gmbh & Co. Kg Device for roll-sealing sheets
EP3228549A1 (en) * 2014-12-02 2017-10-11 Nisshin Seifun Group Inc. Horizontal pillow packaging apparatus and horizontal pillow packaging method

Also Published As

Publication number Publication date
GB2618175A (en) 2023-11-01
GB202206056D0 (en) 2022-06-08
GB202219010D0 (en) 2023-02-01

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