GB2052377A - Packaging or display material, process and apparatus - Google Patents

Packaging or display material, process and apparatus Download PDF

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Publication number
GB2052377A
GB2052377A GB7916392A GB7916392A GB2052377A GB 2052377 A GB2052377 A GB 2052377A GB 7916392 A GB7916392 A GB 7916392A GB 7916392 A GB7916392 A GB 7916392A GB 2052377 A GB2052377 A GB 2052377A
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GB
United Kingdom
Prior art keywords
strips
substrate
securing
pocket forming
sheets
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
GB7916392A
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GB2052377B (en
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Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB7916392A priority Critical patent/GB2052377B/en
Publication of GB2052377A publication Critical patent/GB2052377A/en
Application granted granted Critical
Publication of GB2052377B publication Critical patent/GB2052377B/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/14—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a face layer formed of separate pieces of material which are juxtaposed side-by-side
    • B32B3/16—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a face layer formed of separate pieces of material which are juxtaposed side-by-side secured to a flexible backing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/002—Flexible containers made from webs by joining superimposed webs, e.g. with separate bottom webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B70/16—Cutting webs
    • B31B70/18—Cutting webs longitudinally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for

Landscapes

  • Containers And Plastic Fillers For Packaging (AREA)

Abstract

There is provided a process and apparatus for forming packaging or display material which includes a plurality of pocket forming strips of material arranged parallel to and spaced from each other on a substrate and secured to the substrate by one longitudinal edge region. The process includes the operations of drawing a first continuous sheet (2) to form the substrate and a second continuous sheet (4) to form the strips into contact with each other and over means such as heated fingers (9) for securing the sheets together. The second sheet (4) is cut by knives (23) at a point upstream of the securing means (9) and is guided on to the securing means (9) by guided plates (14). Transverse sealing means including a heated transverse bar (37) and a reciprocable pressure plate (39) may be placed downstream of a point at which the waste strips (13) are removed so as to be able to provide pockets having three sides sealed to the substrate. <IMAGE>

Description

SPECIFICATION Packaging or display material, process and apparatus This invention relates to packaging or display material which includes a plurality of pocket forming strips of material arranged parallel to and spaced from each other on a substrate and each secured to the substrate by one longitudinal region thereof.
The strips may also be secured to the substrate by regions thereof extending transversely to the said longitudinal edge region and these transverse regions may be either at the ends of the strips or at a plurality of points along the length of the strips as well as or instead of at the ends thereof. The size of the pockets will depend upon the type of object which is to be packaged or displayed in the material of the invention. In one particularform of such packaging material the articles to be stored are photographic slides and the packaging material comprises a substrate sheet of a size substantially equal to A4 size and has five rows of four pockets formed over the sheet as well as an edge region for allowing the sheet to be held in a storage file.An alternative example of material according to the invention could be a large sheet of material having pockets arranged thereon of a size sufficient to receive shoes.
With packaging or display material of the above described type it is advantageous if there is a spacing between the bottom of one pocket and the top of the pocket immediately therebelow.
In accordance with the present invention there is provided a process for forming packaging or display material which includes a plurality of pocket forming strips of material arranged parallel to and spaced from each other on a substrate and each secured to the substrate by one longitudinal edge region thereof, the process including the operations of drawing a first continuous sheet to form the substrate and a second continuous sheet to form said strips from supply rolls and in contact with each other and over means for securing the sheets together along predetermined parallel linear regions thereof and so securing said sheets together, and cutting said second continuous sheet at a point upstream of said securing means along a plurality of parallel lines to form said pocket forming strips and waste strips lying therebetween.
It is preferred that the waste strips and the pocket forming strips are drawn with substantially equal tension by respective draw off means during said drawing, cutting and securing operations.
The invention is particularly appropriate where the two continuous sheets of material are made of plastics materials and the securing operation is a welding operation. In this case one or other of the welding techniques described in British patent applications 4289/77 and 7830506 may usefully be utilized in association with the present invention.
It is a further preferred feature of this invention that the pocket forming strips be guided with respect to the securing means at a point immediately upstream of the securing means. It is a further preferred feature of the process of this invention that the cutting of the continuous sheet forming the pocket forming strips should take place at a point some distance upstream from the said guiding means.
In accordance with the invention also there is provided apparatus for forming packaging or display material which includes a plurality of pocket forming strips of material arranged parallel to and spaced from each other on a substrate and each secured to the substrate by one longitudinal edge region thereof, which apparatus includes means for supporting supply rolls respectively of a first continuous sheet to form the substrate and a second continuous sheet to form said strips, means for cutting the said second sheet along longitudinal parallel lines therein, means for securing the pocket forming strips to the substrate and means for drawing the pocket forming strips and the substrate together across said securing means and wherein the said cutting means are located upstream of the securing means.
Preferably the cutting means are arranged to cut parallel pocket forming strips and interlying waste strips from said second sheet of material and preferably also the means for drawing the sheets of material are arranged to draw both the waste strips and the pocket forming strips as well as the substrate together across the securing means. Furthermore, it is preferred that there are provided means for guiding the pocket forming strips which are disposed immediately before the securing means.
In a preferred form of the apparatus of the invention for welding plastics sheet materials together the securing means may be welding fingers of the type described in one of application numbers 4289/77 and 7830506. Furthermore, in accordance with the invention and where the continuous sheets of material are plastics sheet materials the apparatus of the present invention defined above may be combined with the cross welding apparatus described in application 7830507 and the cross welding apparatus is located downstream of the longitudinal welding means at a point after separation of the waste strips from the remaining portions of the sheet materials.
One embodiment of the invention will now be described by way of example only with reference to the accompanying drawings in which: Figure 1 is a schematic side view and Figure 2 is a schematic plan view of apparatus embodying the invention; and Figure 3 is a schematic elevation of a modification of part of the apparatus of Figures 1 and 2.
The apparatus embodying the present invention shown in the drawings comprises a supply roll 1 for supplying a continuous sheet 2 of a plastics material substrate and a supply roll 3 of a continuous sheet 4 of plastics material for forming the pocket forming strips 5 shown in Figure 2. The sheets 2 and 4 are guided round guide rollers 6 and 7 respectively towards a first pair of pinch rolls 8 which is not driven after which the sheet material is passed across welding fingers 9 conducting heat from heating means 9a and to a second pair of draw off pinch rolls 10 which are driven from a motor 11 by way of a belt drive 12.
A plurality of cutting knives 23 are so arranged that a number of waste strips 13 are formed which are located one above each of the pocket forming strips 5 (as seen in Figure 2). Immediately before the pinch rolls 8 there is arranged a guide means 14which comprises a flat plate lying between the sheets 2 and 4 and having a plurality of upstanding fins which are spaced apart in correspondence with the spacing of the knives 23 and the edges of the sheets 2 and 4.
The welding fingers 9 are arranged so as to weld the strips 5 to the substrate 2 substantially along the bottom edge of the pocket forming strips 5.
The manner in which the packaging material, in its intermediate state, is subsequently handled is open to choice. It is possible to provide a take-up roll for the welded strips 5 and substrate 2 and also for the waste strips 13 immediately down stream of the pinch rolls 10. The roll of material can then be transferred to other machines for subsequent operations during which the waste strips 13 are removed during unwinding from the take-up roll. Alternatively the packaging material can proceed from the pinch rolls 10 to a further stage in the formation of the packaging material by the welding of transverse weld lines having regard to the direction of movement of the plastics sheet materials so as to form pockets in the pocket forming strips 5. Suitable apparatus for cross welding has been described in British patent application 7830507.
In the drawings of the present there is illustrated a modification of the apparatus shown in British application 7830507. A further set of pinch rolls 30 is provided downstream of the pinch rolls 30 and these pinch rolls are driven from an electric motor 31 by way of a drive belt 32. The motors and the gearing is so arranged that the pinch rolls 10 and 30 run at substantially the same surface speed. A guide roll 33 is arranged immediately downstream of the pinch rolls 10 to be used to guide away the waste strips 13.
Between the guide roll 33 and the pinch rolls 30 there is provided a cross welding arrangement. Below the path of movement of the sheets 2 and 4 there is provided a fixed plate 35 attached to which is an electric heater 36. The plate 35 and the heater 36 extend across substantially the whole width of the sheet 2. A welding plate 37 is hinged to the plate 35 and stands substantially vertically with its upper edge in (or slightly above or slightly below) the path of movement of the sheets 2 and 4 passing from the pinch rolls 10 to the pinch rolls 30. A spring 38 acts between the hinged welding plate 37 and a fixed support to return the welding plate 37 against the direction of movement of the sheets 2 and 4.Above the path of movement of the sheets 2 and 4there is located a pressure member 39 which is resiliently mounted on a slide block 40 which is vertically slidable towards and away from the welding plate 37 against a fixed slide member 41. A connecting rod 42 connects the slide block 40 to a crank 43 driven by the electric motor 31.
The iower surface of the pressure plate 39 is coated or covered with a suitable heat resistant material which allows the plastics material to slide thereover.
In use of the cross welder illustrated in Figures 1 and 2 of the drawings the slide block 40 is reciprocated vertically in correspondence with the tnove- ment of the sheets between the slide block and welding plate and this movement causes the pressure plate 39 periodically to push the sheets 2 and 4 against the welding plate 37. The pressure is sufficient to cause the plate 37 to hinge on its pivot point and to move with the sheets 2 and 4 while welding the same until the further vertical upward movement of the slide block releases the pressure.During this time the sheets slide over the pressure plate 39 and the time of maintenance of the contact is determined by the nature of the materials, the temperature of the welding plate 37 and other factors being determined by routine experience to produce suitable cross welds 45 which complete the formation of pockets 46 in the packaging material. As soon as the slide block 40 has been moved vertically upwardly sufficiently to release the pressure the hinge plate 37 is returned against the direction of movement of the sheet to its original position by the spring 38.
The completed packaging material now passes through the pinch rolls 30 to subsequent severing and packaging operations.
In the operation of the portion of the apparatus prior to the pinch rolls 10, the two plastics sheets 2 and 4 are fed around the guide rolls 6 and 7 and through the pinch rolls so as to draw the sheet materials continuously from the supply rolls 1 and 3.
The knives 23 are inserted into the sheet 4so as to provide the cuts to form the pocket forming strips 5 and the waste strips 13 and the guide means 14 is then established in position to guide the strips 5 accurately in relation to the welding fingers 9 which themselves are heated so as to weld the pocket forming strips 5 to the substrate 2 along weld lines 22. Since the pinch rolls 10 are driven and received both the pocket forming strips 5 and the waste strips 13, the entire width of the sheet 4 is subject to substantially the same tension both before and after cutting by the knives 23.This is found to reduce any tendency of the plastics material to distort after cutting and to allow a very accurate guidance of the sheets to the welding fingers 9 and thus the establishment of an accurate and continuous weld along a longitudinal edge of the pocket forming strips 5 so that the finished product has substantial uniformity of appearance and strength.
The pressure plate 39 of the embodiment of Figures 1 and 2 is constrained to move vertically only and the sheet materials slide over the pressure surface thereof during the welding operation. It has been found to be possible and advisable in some circumstances to constrain the pressure plate so that it also has a movementwhich is directed either with or against the direction of movement of the sheet materials over the welding plate.
In a modification of the apparatus of Figures 1 and 2 illustrated in Figure 3, the pressure plate 39 is replaced by a roller 50 which is freely rotatably mounted on a shaft 51 which is guided vertically in slots 52 in fixed supports 53 and has one end rotatably connected to connecting rod 42. Axial movement of shaft 51 is limited by collars 54. The roller 50 is covered with a layer of resilient foam material 55. In this modified construction the roller is free to move with the sheet materials during the welding operation and if the inertia of the roller is kept low any wiping of the pressure surface across the sheet materials can be avoided which can result in an improved finish in the packaging material.

Claims (20)

1. A process for forming packaging or display material which includes a plurality of pocket forming strips of material arranged parallel to and spaced from each other on a substrate and each secured to the substrate by one longitudinal edge region thereof, the process including the operations of drawing a first continuous sheet to form the substrate and a second continuous sheet to form said strips from supply rolls and into contact with each other and over means for securing the sheets together along predetermined parallel linear regions thereof, so securing said sheets together, and cutting said second continuous sheet at a point upstream of said securing means along a plurality of parallel lines to form said pocket forming strips and waste strips lying therebetween.
2. A process according to claim 1 wherein the waste strips and the pocket forming strips are drawn with substantially equal tension by respective draw off means during said drawing, cutting and securing operations.
3. A process according to claim 1 or claim 2 wherein the two continuous sheets of material are made of plastics materials.
4. A process according to claim 3 wherein the securing operation is a welding operation.
5. A process according to any preceding claim including guiding the pocket forming strips with respect to the securing means at a point immediately upstream of the securing means.
6. A process according to any preceding claim wherein the cutting of the continuous sheet forming the pocket forming strips takes place at a point a substantial distance upstream from the said guiding means.
7. A process according to any preceding claim including securing said pocket forming strips transversely to said substrate with respect to the direction of movement thereof and at regular spaced apart locations in said direction.
8. A process according to claim 7 wherein said transverse securing operation is a welding operation.
9. A process according to claim 7 or claim 8 further including forming discrete sheets of said material by transverse cutting of said continuous sheets after said transverse welding operation.
10. A sheet of material formed by a process according to claim 9.
11. Apparatus for forming packaging or display material which includes a plurality of pocket forming strips of material arranged parallel to and spaced from each other on a substrate and each secured to the substrate by one longitudinal edge region thereof, which apparatus includes means for supporting supply rolls respectively of a first continuous sheet to form the substrate and a second continuous sheet to form said strips, means for cutting the said second sheet along longitudinal parallel lines therein, means for securing the pocket forming strips to the substrate and means for drawing the pocket forming strips and the substrate together and in contact with each other across said securing means and wherein the said cutting means are located upstream of the securing means.
12. Apparatus according to claim 11 wherein the cutting means are arranged to cut parallel pocket forming strips and interlying waste strips from said second sheet of material.
13. Apparatus according to claim 12 wherein the means for drawing the sheets of material are arranged to draw both the waste strips and the pocket forming strips as well as the substrate together across the securing means.
14. Apparatus according to claim 12 or claim 13 further including means for guiding the pocket forming strips which are disposed immediately before the securing means.
15. Apparatus according to any one of preceding claims 11 to 14 for welding plastics sheet materials together, wherein the securing means is comprised of a plurality of welding fingers disposed substantially vertically with respect to the plane of movement of the continuous sheets and means for heating the ends of the fingers remote from said plane.
16. Apparatus according to any one of preceding claims 11 to 15 for welding plastics sheet materials including means for effecting a weld between said pocket forming strips and said substrate and extending transversely of the direction of movement of the sheets.
17. Apparatus according to claim 11 wherein said transverse weld effecting means includes a bar having a welding edge reciprocable in the direction of movement of the sheets, and means for heating the opposed edge of said bar.
18. Aprocess for forming packaging or display material substantially as hereinbefore described with reference to the accompanying drawings.
19. Packaging or display material manufactured in accordance with the process of claim 18.
20. Apparatusforforming packaging or display material substantially as hereinbefore described with reference to the accompanying drawings.
GB7916392A 1979-05-11 1979-05-11 Packaging or display material process and apparatus Expired GB2052377B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7916392A GB2052377B (en) 1979-05-11 1979-05-11 Packaging or display material process and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7916392A GB2052377B (en) 1979-05-11 1979-05-11 Packaging or display material process and apparatus

Publications (2)

Publication Number Publication Date
GB2052377A true GB2052377A (en) 1981-01-28
GB2052377B GB2052377B (en) 1983-02-02

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Application Number Title Priority Date Filing Date
GB7916392A Expired GB2052377B (en) 1979-05-11 1979-05-11 Packaging or display material process and apparatus

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0909721A1 (en) * 1997-10-16 1999-04-21 Eugenio Tiozzo Gobetto Perforated extensible film for palletizing
DE10310814A1 (en) * 2003-03-12 2004-09-23 Mega Plast S.A., Heraklion Plastic stretch wrapping film comprises a primary film with spaced longitudinal reinforcing strings onto which additional film strips are attached

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0909721A1 (en) * 1997-10-16 1999-04-21 Eugenio Tiozzo Gobetto Perforated extensible film for palletizing
DE10310814A1 (en) * 2003-03-12 2004-09-23 Mega Plast S.A., Heraklion Plastic stretch wrapping film comprises a primary film with spaced longitudinal reinforcing strings onto which additional film strips are attached

Also Published As

Publication number Publication date
GB2052377B (en) 1983-02-02

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PCNP Patent ceased through non-payment of renewal fee