GB2179888A - Variable speed form-fill-seal machines - Google Patents

Variable speed form-fill-seal machines Download PDF

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Publication number
GB2179888A
GB2179888A GB08521981A GB8521981A GB2179888A GB 2179888 A GB2179888 A GB 2179888A GB 08521981 A GB08521981 A GB 08521981A GB 8521981 A GB8521981 A GB 8521981A GB 2179888 A GB2179888 A GB 2179888A
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GB
United Kingdom
Prior art keywords
sealing
speed
machine
fill
jaw
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.)
Granted
Application number
GB08521981A
Other versions
GB2179888B (en
GB8521981D0 (en
Inventor
Georgio Mugnai
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.)
WR Grace and Co
Original Assignee
WR Grace and Co
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 WR Grace and Co filed Critical WR Grace and Co
Priority to GB08521981A priority Critical patent/GB2179888B/en
Publication of GB8521981D0 publication Critical patent/GB8521981D0/en
Publication of GB2179888A publication Critical patent/GB2179888A/en
Application granted granted Critical
Publication of GB2179888B publication Critical patent/GB2179888B/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83511—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • B29C66/83513—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums cooperating jaws mounted on rollers, cylinders or drums and moving in a closed path
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B29C66/93431—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed the speed being kept constant over time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B29C66/93441—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed the speed being non-constant over time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • B29C66/944—Measuring or controlling the joining process by measuring or controlling the time by controlling or regulating the time
    • B29C66/9441—Measuring or controlling the joining process by measuring or controlling the time by controlling or regulating the time the time being controlled or regulated as a function of another parameter
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Package Closures (AREA)

Abstract

A horizontal form-fill-seal machine has counter-rotating sealing jaws 5 and 6 whose progress is monitored by photocells PC1 and PC2 such that once the jaw 6 passes photocell PC1 the speed of the motor driving the sealing jaws is lowered to provide increased dwell time to achieve adequate seal strength without the need for high sealing temperatures, and the speed is then increased once the jaw 6 passes photocell PC2 and enters the "rest phase" before the next sealing operation. The motor speed control is such that despite varying machine throughput speeds, the dwell time of the film between the jaws 5 and 6 at the sealing station is substantially constant to provide for optimum seal strength at the optimum sealing temperature of the film being used. <IMAGE>

Description

SPECIFICATION Improvements relating to variable speed form-fill-seal machines The present invention relates to a form-fill-seal machine which takes a web of plastic film material and forms it into a tube into which a product commodity is loaded and the tube is then transversely sealed, and preferably simultaneously severed, at regular intervals to define discrete packages containing the product commodity.
Form-fill-seal machines may be horizontal form-fill-seal (HFFS) machines in which normally the product will be one or more discrete articles which can be packed in the individual packages, but it is known to provide vertical form-fill-seal (VFFS) machines in which the product commodity is normally a liquid or a granular or powdery material which settles onto one of the transverse seal lines during formation, that seal line then defining the floor of the package in question.
In a form-fill-seal machine it is desirable to be able to change the speed of operation in order to suit the number of packages to be formed per unit time. For example, depending on the nature of the product it may be necessary to adapt the speed of operation of the FFS machine to the rate of supply of that product; alternatively, it may be desirable to change the rate of production in order to suit subseguent handling operations.
It has been known in the past to provide for variation of the operating speed of an HFFS machine, for example from U.S. Patent No. 4,073,116 (BAKER PERKINS HOLDINGS LIMITED), and means have been provided for carefully maintaining the speed of movement of the sealing jaws while in contact with the horizontally moving tube at the sealing station, to ensure accurate registration of the seal line relative to the moving film. The machine of U.S. Patent No. 4,073,116 also includes provision for adjusting the length of the packages formed, i.e. by varying the spacing between successive seals.
In the prior art, it has been most important to relate the speed of movement of the jaws, and hence the dwell time of the jaws in contact with the formed tube, to the rate of advance of the tube from the tube-forming box where the flat film is formed into a tube, and this has involved a dwell time which changes in direct proportion to the speed of the machine main drive and hence to the rate of production of the packages.
Accordingly, the present invention provides a form-fill-seal machine including means for adjusting the machine speed, and means responsive to the cyclic operation of the machine for cyclically varying the speed of operation of the sealing means such that the time for which the film material is subjected to a sealing operation by the sealing means is maintained substantially constant despite varying machine throughput speeds.
In order that the present invention may more readily be understood the following description is given, merely by way of example, with reference to the accompanying drawings in which: FIGURE 1 is a side elevational view of the sealing jaws and associated photocells at the sealing station of an HFFS machine in accordance with the present invention; FIGURE 2 is a circuit diagram showing the connection of the two photocells and their associated relays; and FIGURE 3 is a diagram showing the main drive motor speed change circuit responsive to the relays of Figure 2.
Figure 1 shows upper and lower rotating sealing jaw carriers 1 and 2, respectively, the upper carrier 1 being rotatable in the clockwise direction and co-operating with the anti-clockwise-moving lower carrier 2. The jaw carriers operate on respective fixed axis rotatable drive shafts 1' and 2' mechanically linked to the machine main drive motor.
Given that the two jaw carriers 1 and 2 rotate in synchronism, albeit in opposite directions of rotation, a first photocell PC1 in advance of the top dead centre position of the lower sealing jaw carrier 2 and a second photocell PC2 just beyond the top dead centre position of the lower jaw carrier 2 are sufficient to sense the progress of the sealing operation on a film (not shown) advancing between the two jaws 5 and 6, carried by the jaw carriers 1 and 2, respectively.
Figure 2 shows the photocell PC1 energised by lines 3a and 3b and the photocell PC2 energised by corresponding lines 4a and 4b, lines 3a and 4a being interconnected by a bridging conductor A and lines 3b and 4b being linked by a bridging conductor B.
A relay R1 is shunted between a signal line 7 and the energising line 3b of photocell PC1, and likewise a relay R2 is shunted between the signal line 8 and the energising line 4b of the photocell PC2. The output of each of the photocells PC1 and PC2 will change value as the lower sealing jaw 6 conceals the photocell PC1 and PC2, respectively, from its associated infra-red emitter (not shown).
Figure 3 illustrates the configuration of the circuit before the lower sealing jaw 6 conceals the photocell PC1.
Once the jaw 6 causes the photocell PC1 to "lose sight" of its infra-red emitter, the relay R1 operates to close contact RC1 in Figure 3.
At this time the normally closed contact RC2 (Figure 3) will already be closed and as a result the relay R3 is energised to close selfholding contact SRC3 (Figure 3) so that once the photocell PC1 is again exposed to infrared emission from its associated emitter, to re-open the normally open contact RC1 by de energising the relay R1 of Figure 2, the relay R3 will remain conducting.
In addition to being connected to the selfholding contacts SRC3, relay R3 also operates a ganged set of contacts RC3 to connect terminals A7, A10 and A2 to a potentiometer P1 which is set to the value required for the film type and thickness to give the main drive motor the appropriate speed during the part of the cycle when the tube becomes engaged between the two jaws 5 and 6 on the sealing jaw carriers 1 and 2, and sealing is taking place.
Photocell PC1 is deliberately well in advance of the top dead centre position of the lower sealing jaw 6, in order to allow the main drive motor speed to decay to the value pre-set on "machine speed" potentiometer P1 before the actual sealing operation starts.
The description above assumes that the master switch MS is in the position illustrated, in which case relay R4 is energised and the ganged contact set RC4 is in the indicated position. If, on the other hand, the switch MS is in the opposite state then the ensuing deenergisation of the relay R4 will switch the ganged contact set RC4 to its other position, connecting terminals A7, A10 and A2 to the "normal" potentiometer P3, set at an appropriate value for a desired machine speed throughout each cycle in the "constant speed" mode.
When the lower sealing jaw 6 obscures the photocell PC2 from its associated infra-red emitter, the change of signal on signal line 8 operates the relay R2 to open the normally closed contacts RC2, thereby de-energising the relay R3 and causing its self-holding contacts SRC3 to open and also changing the state of the ganged contact set RC3 to connect the terminals A7, A10 and A2 now to the "machine speed" potentiometer P2 which is set to a value which results in an increase in the speed of the main drive motor until photocell PC1 is next obscured by the sealing jaw 6 on the run-up to a sealing phase.
It will of course be obvious that when the photocell PC2 is again exposed to infra-red radiation by completion of the pass of the lower sealing jaw 6, the closing of contacts RC2 (by the change of state on the signal line 8 operating the relay R2) will not affect the condition of relay R3 because the contacts RC1 controlled by photocell PC1 and the selfholding contacts SRC3 for the relay R3 will both be open, and will thus prevent energisation of the relay R3.
From the above, it will be understood that with the switch MS in the position "1" shown, the main drive motor for the film advance, product infeed, sealing jaw carriers 1 and 2, and product delivery will cyclically speed up and slow down so that it will slow down during the sealing phase of the jaws 5 and 6, in order to provide adequate dwell time for the sealing operation, despite the fact that an increased overall machine speed may have been selected on the potentiometer P2, and the resulting loss of time during the sealing operation is recouped by the correspondingly increased speed of the elements of the machine during the remaining nearly three quarters of a revolution of the lower sealing jaw carrier 2 before the photocell PC1 next becomes obscured.
It will be appreciated that the potentiometers P1 and P2 will be set in such a way that as higher machine speeds are selected, the difference in speed imparted to the sealing jaw speed controller by way of the signals on terminals A7, A10 and A2 by the "dwell time" potentiometer P1 during the sealing phase will more markedly differ from the speed imparted by the setting on the "machine speed" potentiometer P2 during the remainder of the cycle as the sealing jaws move round to approach the next sealing operation.
By controlling the dwell time to be constant, it is possible to ensure that each film material used for the tube which is being formed and filled by the FFS machine can be sealed at the optimum temperature which is high enough to provide adequate seal strength but is not too high in which case the film may suffer disadvantageous side effects, for example puckering at the seal in the case of a shrinkable film.In the past, when the machine speed has been reduced on a prior art machine the sealing temperature has been correspondingly reduced and when machine speed is increased there is a corresponding increase in the sealing temperature, but this has given rise to precisely the undesirable side effects such as puckering in the case of a shrinkable film, which the present invention avoids by controlling the sealing action on the basis of a constant dwell time and a constant temperature (optimum for the film material chosen) rather than varying the temperature to allow a given quantity of heat to be imparted to the tube being sealed, despite changes in the dwell time.
It is important to note that whereas in the prior art cyclic variations in the speed of operation of the sealing jaws has been used in order to allow a larger or shorter length of tube to pass between the jaws during the interval between successive sealing operations (for the purposes of changing the length of the package), there has been no suggestion of endeavouring to maintain a constant dwell time by varying the speed of the entire machine including the jaws during the sealing operation. This constitutes a most surprising departure of the present invention from the prior art.
Although it is envisaged that the "dwell time" and "machine speed" potentiometers P1 and P2, respectively, which are in circuit in the "variable speed" mode, may be set by hand to compensate for different machine speeds (by virtue of a calibration chart to give the settings required of each of the two potentiometers PI and P2 for a given material and a given throughput speed it is of course possible to programme a microprocessor to effect the necessary speed variation regime for the jaw carriers 1 and 2 (and the rest of the machine), and in order to allow adjustment of the main drive speed of the machine.
Furthermore, although photocells PC1 and PC2 are shown in Figure 1 as the means for sensing the progress of the sealing jaw carriers 1 and 2, it is of course possible to use pulse encoders to generate pulses at specific parts of the cycle of the machine (and not necessarily of one or both of the sealing jaw carriers 1 and 2), for the purposes of providing a more positive control of the machine in response to the position of the jaws 5 and 6.
Although the present invention has been described in terms of an HFFS machine, it is of course possible for the principle of this invention to be incorporated in a VFFS machine, if desired.

Claims (7)

1. A form-fill-seal machine including means for adjusting the machine speed, and means responsive to the cyclic operation of the machine for cyclically varying the speed of operation of the sealing means such that the time for which the film material is subjected to a sealing operation by the sealing means is maintained substantially constant despite varying machine throughput speeds.
2. A machine according to claim 1, wherein the sealing means comprise counter-rotating rotary sealing jaw carriers carrying respective sealing jaws and the speed control means include means responsive to the attainment of predetermined positions by at least one of the sealing jaw carriers.
3. A machine according to claim 2, wherein said means responsive to the attainment of predetermined positions by the said at least one sealing jaw carrier comprise photocells operating in conjunction with radiation emitters and arranged to be obscured from the associated emitter by passage of the said at least one sealing jaw therebetween.
4. A machine according to claim 1, 2 or 3, wherein the speed of operation of the sealing means is varied by cyclically varying the speed of the main drive motor of the machine.
5. A machine according to claim 4, wherein the cyclic speed varying means include a first potentiometer for imparting a given motor speed parameter to the machine main drive motor during the sealing operation, and a second potentiometer imparting a second motor speed parameter to the main drive motor during the "rest" phase between one sealing operation and the next.
6. A machine according to any one of the preceding claims, and including a control switch for disabling the means for cyclically changing the operation speed of the sealing means, if desired.
7. A form-fill-seal machine substantially as hereinbefore described with reference to, and as illustrated in, the accompanying drawings.
GB08521981A 1985-09-04 1985-09-04 Improvements relating to variable speed form-fill-seal machines Expired GB2179888B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08521981A GB2179888B (en) 1985-09-04 1985-09-04 Improvements relating to variable speed form-fill-seal machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08521981A GB2179888B (en) 1985-09-04 1985-09-04 Improvements relating to variable speed form-fill-seal machines

Publications (3)

Publication Number Publication Date
GB8521981D0 GB8521981D0 (en) 1985-10-09
GB2179888A true GB2179888A (en) 1987-03-18
GB2179888B GB2179888B (en) 1989-01-11

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GB08521981A Expired GB2179888B (en) 1985-09-04 1985-09-04 Improvements relating to variable speed form-fill-seal machines

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2214128A (en) * 1987-12-28 1989-08-31 Omori Machinery An automatic sealing method
GB2226523A (en) * 1988-12-28 1990-07-04 Fuji Machinery Co Packaging method and apparatus
FR2707081A1 (en) * 1993-07-01 1995-01-06 Cavanna Spa A method of controlling the operation of a rotary jaw closure unit for a packaging machine.
EP1380505A1 (en) * 2002-07-11 2004-01-14 Toyo Jidoki Co., Ltd. bag-making machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1114447A (en) * 1965-07-19 1968-05-22 Hauni Werke Koerber & Co Kg Improvements in package wrapping machines
GB1185701A (en) * 1966-01-28 1970-03-25 Windmoeller & Hoelscher Machine for Processing Webs
GB1196773A (en) * 1966-07-12 1970-07-01 Weldotron Corp Method and Apparatus for Packaging Articles.
GB1420471A (en) * 1973-01-12 1976-01-07 Baker Perkins Holdings Ltd Modulating drive mechanisms
GB1517211A (en) * 1974-07-10 1978-07-12 Gd Spa Device for heat sealing seams of thermoplastic overwraps on packets

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1114447A (en) * 1965-07-19 1968-05-22 Hauni Werke Koerber & Co Kg Improvements in package wrapping machines
GB1185701A (en) * 1966-01-28 1970-03-25 Windmoeller & Hoelscher Machine for Processing Webs
GB1196773A (en) * 1966-07-12 1970-07-01 Weldotron Corp Method and Apparatus for Packaging Articles.
GB1420471A (en) * 1973-01-12 1976-01-07 Baker Perkins Holdings Ltd Modulating drive mechanisms
GB1517211A (en) * 1974-07-10 1978-07-12 Gd Spa Device for heat sealing seams of thermoplastic overwraps on packets

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2214128A (en) * 1987-12-28 1989-08-31 Omori Machinery An automatic sealing method
GB2226523A (en) * 1988-12-28 1990-07-04 Fuji Machinery Co Packaging method and apparatus
AU624424B2 (en) * 1988-12-28 1992-06-11 Fuji Machinery Co. Ltd. Packaging method and apparatus
GB2226523B (en) * 1988-12-28 1993-08-18 Fuji Machinery Co Packaging method and apparatus
FR2707081A1 (en) * 1993-07-01 1995-01-06 Cavanna Spa A method of controlling the operation of a rotary jaw closure unit for a packaging machine.
GB2279637A (en) * 1993-07-01 1995-01-11 Cavanna Spa Control of rotary jaw of packaging machine
EP1380505A1 (en) * 2002-07-11 2004-01-14 Toyo Jidoki Co., Ltd. bag-making machine

Also Published As

Publication number Publication date
GB2179888B (en) 1989-01-11
GB8521981D0 (en) 1985-10-09

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