GB2237008A - Dancer rollers - Google Patents

Dancer rollers Download PDF

Info

Publication number
GB2237008A
GB2237008A GB8923128A GB8923128A GB2237008A GB 2237008 A GB2237008 A GB 2237008A GB 8923128 A GB8923128 A GB 8923128A GB 8923128 A GB8923128 A GB 8923128A GB 2237008 A GB2237008 A GB 2237008A
Authority
GB
United Kingdom
Prior art keywords
rollers
material
product
products
tubular section
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.)
Withdrawn
Application number
GB8923128A
Other versions
GB8923128D0 (en
Inventor
Johannes Heinz Knopp
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.)
FINAL PACKAGING Ltd
Original Assignee
FINAL PACKAGING 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 FINAL PACKAGING Ltd filed Critical FINAL PACKAGING Ltd
Priority to GB8923128A priority Critical patent/GB2237008A/en
Publication of GB8923128D0 publication Critical patent/GB8923128D0/en
Publication of GB2237008A publication Critical patent/GB2237008A/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00Enclosing 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
    • B65B9/06Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it
    • B65B9/073Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it the web having intermittent motion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00Changing the web roll
    • B65H19/10Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/14Accumulating surplus web for advancing to machine while changing the web roll

Abstract

An assembly of dancer rollers (5, 8) for incorporation in the path of sheet material (3) between a supply roll (1) and a further stage of a machine or process, comprises opposed banks (5, 8) of such rollers that are relatively movable so that one bank (8) can pass between the other from an idle position (Fig. 2) in which the film material can pass along a linear path (11) between the rollers to a working position (Fig. 1) in which the material follows a zig-zag path around the rollers. Also incorporated is a packaging machine for presenting a tubular section of material with an open end to receive a product, in which a loading surface (34) is movable to present the product into the tube, which is then sealed once the surface is withdrawn. <IMAGE>

Description

IMPROVEMENTS IN AND RELATING TO PACKAGING MACHINES This invention concerns improvements in and relating to packaging machines, and more especially to packaging machines of the kind in which a product to be packaged is sealed within a bag or envelope formed by sealing and severing a tubular portion from a length of material. The tubular portion to form the bag or envelope may be produced by sealing along a longitudinal seam a length of sheet material that is folded longitudinally to form the tube.

Known machines of the above type suffer from a number of disadvantages. For example, sheet material to be drawn from a supply roll to the point at which the material is to be formed into the bag or envelope is required to pass through a series of dancer rollers required to compensate tension that may occur in the sheet material between the supply roll from which the sheet material is delivered and the operating mechanism of the packaging machine. Particularly when a machine is required to provide for optional selection of materials from different supply rolls, for example to enable selection of material of different width, the corresponding requirement for re-threading of the sheet material between the dancer rollers is time consuming and laborious and correspondingly reduces productivity.

Another disadvantage of machines that require the insertion of a product into a formed tube is that the insertion of certain kinds of product into the formed tube become difficult or impossible owing to the nature of the product. Thus, for example, various types of fresh vegetable may tend to stick to the plastics film material utilised for packaging on initial contact therewith, preventing correct insertion within a formed pouch of the film material. Also, the handling of loose products to be packed together in a single bag is difficult in known machines.

It is accordingly an object of the present invention to overcome or at least reduce one or more of the above-mentioned disadvantages.

In accordance with one aspect of the invention, an arrangement of dancer rollers for incorporation in the path of sheet or film material between a supply roll and a further stage of a machine for processing or operating on the sheet or film material comprises opposed banks of dancer rollers that are movable relatively to one another in such a manner that one bank of rollers can pass between the other from an idle position in which sheet or film material can be passed along a linear path between the two banks of rollers, to a working position in which material fed along said linear path is constrained by the rollers to follow a zig-zag path between the respective banks of rollers.

In such an arrangement the requirement for laborious threading of the material around the dancer rollers is eliminated, since it is only necessary to introduce the material along a linear path between the rollers in the idle condition and then to displace the rollers to their working position.

According to another aspect of the invention there is provided a packaging machine including means for presenting a tubular section of wrapping material with the axis of the tube extending generally horizontally and an end of the tubular section open to receive a product or products to be packaged, characterised in that the machine further includes means providing a supporting surface for receiving a product or products to be packaged, said means being mounted for to and fro longitudinal movement from a point at which said supporting surface is located outside said tubular section for loading with a product or products to be packaged, to a position wherein said supporting surface is located inside said tubular section, the arrangement being such that said supporting surface is retractable relatively to the product or products supported thereon to deposit said product or products within the tubular material. Advantageously, said supporting surface is bounded by an upwardly extending abutment means with respect to which the surface is retractable, whereby said abutment means can serve to retain the product or products to be packaged within the tubular section of material.

Preferred features and advantages of various aspects of the invention will become apparent from the following description and the drawings.

The invention is illustrated by way of example in the accompanying drawings in which: Figure 1 is a diagrammatic elevation of an arrangement for guiding a web of material to be fed from a supply roll, Figure 1A is a perspective view of an arrangement corresponding to Figure 1, Figure 2 is a view corresponding to Figure 1 showing components of the machine in an alternative position, Figure 2A is a perspective view corresponding to Figure 2, Figure 3 is a diagrammatic elevation of the relevant part of a packaging machine in accordance with the invention and, Figure 4 is a plan view of a detail of Figure 3.

Referring to Figures 1 and 1A, a supply roll 1 of web material, for example a synthetic plastics film of the kind utilised for wrapping articles, is supported upon a pair of rollers 2 arranged to be driven to rotate the roll 1 and advance material therefrom.

Web material 3 from the supply roll 1 is fed to a subsequent stage in, for example, a packaging machine, via an arrangement of dancer rollers indicated generally at 4. Thus there is provided a lower bank 4A of dancer rollers 5, the ends 6f which are mounted between arms 6 pivoted about the axis of an initial roller 7 over which is threaded the film material 3 passing from the supply roll 1. The upper bank 4B of dancer rollers 8 are mounted in a cradle comprising two generally combshaped elements 9 locating the ends of the rollers 8 and interconnected by a transverse bar 10 at the upper ends of the elements 9.

In the normal position of operation of the arrangement shown in Figure 1, the cradle formed by the elements 9 and the cross-bar 10 is located in a fixed position as indicated in Figures 1 and 1A, the film material 3 passing in zig-zag configuration between the rollers 5 and 8 and the pivoted bars 6 being free to pivot about the axis of the roller 7 and accommodate tension in the material.

When a new supply of film material is to be introduced into the arrangement of Figures 1 and 1A, the cradle carrying the upper rollers 8 can be lowered into the position shown in Figures 2 and 2A so that the rollers 8 pass between the corresponding rollers 5 and there is between the rollers 5 and 8 a sufficient space to enable film material to be threaded from the roller 1, over the roller 7 and along a rectilinear path indicated at 11. With the film material 3 extending along the path 11 the cradle carrying the rollers 8 can be returned to the position of Figure 1 so that the film material 3 is drawn between the rollers 5 and adopts the zig-zag path shown in Figure 1 without the requirement for laborious threading of the film 3 around the respective rollers.

Referring now to Figures 3 and 4 of the drawings, a further aspect of the invention will now be described.

Figure 3 shows a diagrammatic elevation of a packaging machine of the kind wherein synthetic plastics material, e.g. film material from a supply arrangement as shown in Figures 1 and 2, is fed to a forming arrangement illustrated generally at 20, wherein the flat sheet material fed from a roller 21 is folded to form a horizontally extending tubular section 22, the edges of the folded film material 3 being sealed together at a point indicated diagrammatically at 23. The correspondingly formed tubular section of material which is advanced intermittently in the direction of the arrow 24 is transversely sealed and severed by means of an appropriate arrangement indicated diagramLatically at 25 for closing and sealing the tubular section of film.

Thus, at each sealing operation a closed forward section of the tubular film is sealed and severed to form a sealed bag or pouch, the remaining portion of the tubular section also being sealed at the forward end to form the closed forward end 26 of the next bag or pouch to be formed.

The machine thus far described is generally of well known type and the operation thereof will be understood by one skilled in the art without the need for further description.

As illustrated in Figure 3, the frame of the machine carries a longitudinally extending guideway 30 upon which a carriage 31 is mounted for to and fro rectilinear movement from the position shown in full lines at the right-hand end of the guideway 30 to the position shown in broken lines at the left-hand end thereof.

As shown in more detail in Figure 4, the carriage 31 has extending therefrom a pair of guide bars 32 to the forward ends of which is fixed a vertically extending abutment plate 33. In the position shown the abutment plate 33 is located at the left-hand end of a shoe or shovel 34 that is slidably supported on the guide bars 32 and the base 34A of which presents a supporting surface upon which can be located a product or products to be packaged. A pneumatic cylinder 35 is mounted upon the carriage 31 and a piston rod 36 extending therefrom is coupled to the shoe 34 in such a manner that upon actuation of the pneumatic cylinder 35 the shoe 34 can be retracted along the guide bars 32 leaving the abutment plate 33 in its fixed position.

In operation of the device described above, products to be packaged are located upon the supporting surface of the loading shoe 34 whilst the carriage 31 is located at the right-hand end of the guideway 30.

By means of a suitable transporting mechanism the carriage 31 is moved along the guideway 30 into the position shown in broken lines, this movement being coordinated with the operations effected upon the packaging film in such a manner that the shoe 34 is introduced into the open end of the tubular section 22 so that the product or products located upon the supporting surface 34A are located within the tubular section of material adjacent the closed forward end 26. The air cylinder 35 is now operated to retract the shoe 34 relatively to the abutment surface 33 so that the product is deposited from the supporting surface 34A, and the carriage 31 is then returned into the right-hand end position. The sealing arrangement 25 may now be operated to sever and seal the bag containing the deposited product, whereupon the packaging cycle can be repeated.

It will be appreciated that although the vertical abutment surface 33 serves to retain the product or products to be packaged within the tubular envelope during retraction of the shoe 34, if the pneumatic cylinder 35 is actuated sufficiently rapidly, the product or products supported thereon will remain stationery under their own inertia. In that case the position of the product within the package is not dependent upon the presence of the abutment surface 33.

Claims (6)

  1. l. An assembly of dancer rollers for incorporation in the path of sheet or film material between a supply roll and a further stage of a machine for processing or operating on the sheet or film material, comprising opposed banks of dancer rollers that are movable relatively to one another in such a manner that one bank of rollers can pass between the other from an idle position in which sheet or film material can be passed along a linear path between the two banks of rollers, to a working position in which material fed along said linear path is constrained by the rollers to follow a zig-zag path between the respective banks of rollers.
  2. 2. An assembly as claimed in Claim 1, wherein that bank of said dancer rollers that in said working position is the lower bank comprises a series of rollers mounted between a pair of parallel supporting arms, said supporting arms being pivoted about the axis of that roller of said lower bank which is to be first in the direction of said path, for movement to accommodate tension in said material, and that bank of said dancer rollers that is the upper bank comprises a series of rollers mounted on limbs of comb shaped elements of a supporting cradle that is movable in a direction generally perpendicular to the longitudinal axes of said supporting arms in such a manner that said limbs and the corresponding upper rollers can pass between said supporting arms and the corresponding lower rollers.
  3. 3. An assembly as claimed in Claim 1, substantially as described herein with reference to Figs. 1 and 2 of the accompanyiing drawings.
  4. 4. A packaging machine including means for presenting a tubular section of wrapping material with the axis of the tube extending generally horizontally and an end of the tubular section open to receive a product or products to be packaged, characterised in that the machine further includes means providing a supporting surface for receiving a product or products to be packaged, said means being mounted for to and fro longitudinal movement from a point at which said supporting surface is located outside said tubular section for loading with a product or products to be packaged, to a position wherein said supporting surface is located inside said tubular section, the arrangement being such that said supporting surface is retractable relatively to the product or products supported thereon to deposit said product or products within the tubular material.
  5. 5. A machine according to Claim 4, wherein said supporting surface is bounded by an upwardly extending abutment means with respect to which the surface is retractable, whereby said abutment means can serve to retain the product or products to be packaged within the tubular section of material.
  6. 6. A machine according to Claim 5, substantially as described herein with reference to Figs. 4 and 5 of the accompanying drawings.
GB8923128A 1989-10-13 1989-10-13 Dancer rollers Withdrawn GB2237008A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8923128A GB2237008A (en) 1989-10-13 1989-10-13 Dancer rollers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8923128A GB2237008A (en) 1989-10-13 1989-10-13 Dancer rollers

Publications (2)

Publication Number Publication Date
GB8923128D0 GB8923128D0 (en) 1989-11-29
GB2237008A true GB2237008A (en) 1991-04-24

Family

ID=10664547

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8923128A Withdrawn GB2237008A (en) 1989-10-13 1989-10-13 Dancer rollers

Country Status (1)

Country Link
GB (1) GB2237008A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995009121A1 (en) * 1993-09-29 1995-04-06 Kustner Industries S.A. Device for controlling the feed motion of a packaging film in a packaging machine, and corresponding control method
FR2728233A1 (en) * 1994-12-19 1996-06-21 Perot Robert Machine for packaging prod. lots with film packaging
EP0814022A1 (en) * 1996-06-20 1997-12-29 Robert Perot Machine for packaging groups of objects
EP1270471A1 (en) * 2001-06-25 2003-01-02 Solipat Ag Method for taking over a material web, steaming device and method for threading a material web into such a device
US6702220B2 (en) 2001-03-28 2004-03-09 Tna Australia Pty Limited Web storage device for a packaging machine

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB904149A (en) * 1959-09-03 1962-08-22 Langham Thompson Ltd J Improvements in or relating to photographic processing
GB933023A (en) * 1961-12-01 1963-07-31 Herr Equipment Corp Tensioning apparatus for tenuous material
GB1295444A (en) * 1969-07-07 1972-11-08
GB1333110A (en) * 1970-12-30 1973-10-10 Wean United Inc Accumulator for strip-like material
GB1350504A (en) * 1970-11-07 1974-04-18 Cherio V Device for netting foodstuff
GB1415079A (en) * 1972-12-22 1975-11-26 Dornier Gmbh Lindauer Storage apparatus for a web of material
GB2003428A (en) * 1977-08-29 1979-03-14 Oce Van Der Grinten Nv Copying apparatus
GB2077687A (en) * 1980-06-09 1981-12-23 Vittel Eaux Min Packaging unit
US4723698A (en) * 1985-07-10 1988-02-09 Stork Brabant B.V. Device for introducing a strip of material between the rollers of a loop take-up apparatus
GB2195605A (en) * 1986-10-07 1988-04-13 William Stirling A device for deploying tubular, flexible, sheet material, and methods of utilization thereof

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB904149A (en) * 1959-09-03 1962-08-22 Langham Thompson Ltd J Improvements in or relating to photographic processing
GB933023A (en) * 1961-12-01 1963-07-31 Herr Equipment Corp Tensioning apparatus for tenuous material
GB1295444A (en) * 1969-07-07 1972-11-08
GB1350504A (en) * 1970-11-07 1974-04-18 Cherio V Device for netting foodstuff
GB1333110A (en) * 1970-12-30 1973-10-10 Wean United Inc Accumulator for strip-like material
GB1415079A (en) * 1972-12-22 1975-11-26 Dornier Gmbh Lindauer Storage apparatus for a web of material
GB2003428A (en) * 1977-08-29 1979-03-14 Oce Van Der Grinten Nv Copying apparatus
GB2077687A (en) * 1980-06-09 1981-12-23 Vittel Eaux Min Packaging unit
US4723698A (en) * 1985-07-10 1988-02-09 Stork Brabant B.V. Device for introducing a strip of material between the rollers of a loop take-up apparatus
GB2195605A (en) * 1986-10-07 1988-04-13 William Stirling A device for deploying tubular, flexible, sheet material, and methods of utilization thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995009121A1 (en) * 1993-09-29 1995-04-06 Kustner Industries S.A. Device for controlling the feed motion of a packaging film in a packaging machine, and corresponding control method
FR2728233A1 (en) * 1994-12-19 1996-06-21 Perot Robert Machine for packaging prod. lots with film packaging
EP0814022A1 (en) * 1996-06-20 1997-12-29 Robert Perot Machine for packaging groups of objects
US6702220B2 (en) 2001-03-28 2004-03-09 Tna Australia Pty Limited Web storage device for a packaging machine
EP1270471A1 (en) * 2001-06-25 2003-01-02 Solipat Ag Method for taking over a material web, steaming device and method for threading a material web into such a device
WO2003000577A1 (en) * 2001-06-25 2003-01-03 Solipat Ag Device for receiving a material web, damping device and method for inserting a material web into one such device

Also Published As

Publication number Publication date
GB8923128D0 (en) 1989-11-29

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)