GB1601061A - Conveyor belt - Google Patents

Conveyor belt Download PDF

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Publication number
GB1601061A
GB1601061A GB21996/78A GB2199678A GB1601061A GB 1601061 A GB1601061 A GB 1601061A GB 21996/78 A GB21996/78 A GB 21996/78A GB 2199678 A GB2199678 A GB 2199678A GB 1601061 A GB1601061 A GB 1601061A
Authority
GB
United Kingdom
Prior art keywords
layer
projections
layers
belt
conveyor belt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB21996/78A
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.)
Mpac Group PLC
Original Assignee
Molins 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 Molins Ltd filed Critical Molins Ltd
Priority to GB21996/78A priority Critical patent/GB1601061A/en
Publication of GB1601061A publication Critical patent/GB1601061A/en
Expired legal-status Critical Current

Links

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
    • 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
    • B32B3/26—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 particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—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 particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/35—Adaptations of conveying apparatus for transporting cigarettes from making machine to packaging machine
    • 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
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B32B3/26—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 particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—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 particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/30—Belts or like endless load-carriers
    • B65G15/32—Belts or like endless load-carriers made of rubber or plastics
    • B65G15/42—Belts or like endless load-carriers made of rubber or plastics having ribs, ridges, or other surface projections
    • 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
    • B32B2433/00—Closed loop articles
    • B32B2433/02—Conveyor belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/02—Articles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Belt Conveyors (AREA)
  • Laminated Bodies (AREA)

Description

(54) CONVEYOR BELT (71) We, MOLINS LIMITED, a British Company, of 2, Evelyn Street, Deptford, London SE8 5DH, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to conveyor belts, and particularly to composite belts made from or including layers of flexible materials such as synthetic plastics. The invention is an improvement in or modification of the invention of British Patent Application No. 54366/76 Serial No. 1,595,790.
According to the present invention there is provided a conveyor belt for conveying delicate rod-like articles in a direction transverse to their lengths, comprising a first layer of flexible material forming a substrate, and a second layer of flexible material bonded to one surface of the first layer, the second layer having a series of integrally-formed rounded projections adapted to engage articles to be conveyed, the projections being elongated transversely of the belt to extend substantially parallel to the articles to be conveyed and having rounded ends so that the projections have no sharp edges which might damage the articles.
The belt may include a third layer of flexible material which is deformed in such a way as to form projections adapted to engage drive teeth, and which is bonded to the other surface of the first layer.
The different layers may be formed from one continuous length of material which has different regions left plain or formed with projections as appropriate, the length then being convoluted so that the different regions each form one layer of the belt. Thus in the case of a belt having drive teeth on one side and rounded projections for conveying articles on the other, the belt may be produced by forming a predetermined number of drive teeth along a first length of the material i.e. approximately one third of the total length starting from one end, leaving the next (one-third) length of material plain, and forming a predetermined number of projections for conveying articles along the remaining (one-third) length of the material, and then connecting the three sections together in a "spiral" form.Preferably the layers are bonded together starting from the inside of the spiral, to facilitate the application of the bonding tools. At the ends the adjacent surface may be embossed to avoid the formation of a "step" in the surface.
Preferably, when separate lengths of web are used they are staggered relative to one another along the belt so that their ends do not coincide. This enables the ends of each web to be joined very simply by bonding them directly onto the surface of the adjacent web, which is continuous at that point.
Preferably the material of the webs is one which is capable of being ultrasonically welded, such as polyester. This makes the bonding operation very simple since the bonding tools can be positioned on either side of a "sandwich" of two pieces of the material, to form a bond between them. The polyester can be obtained in a "pretensiled" form which is particularly suitable for the substrate of a belt.
The projections of the belt are preferably formed by deforming the material of the respective webs before they are assembled, for example by passing them between forming rollers, or by pressing out the projections between a pair of shaped reciprocating forms.
Alternatively the projections may be vacuum formed.
Projections suitable to engage drive teeth, i.e.
having a "trapezium" cross-section which is uniform across the width of the web, may conveniently be formed for the third layer (where present) by passing the web between a pair of co-operating heated rollers.
The projections of the second layer, i.e.
those which contact the delicate articles to be conveyed may be formed by distorting the material of the layer, for example by the application of mechanical or fluid pressure and/or heat. The rounded projections thus formed preferably do not extend to the extreme edges of the belt, but instead a narrow margin of undistorted material is left along the whole length of the edge of the web. This enables the second layer having the projections to be very simply and quickly attached to the first (sub strate) layer by forming a continuous bond all along their co-extensive edges, in a known fashion e.g. thermally or ultrasonically. In the case of a belt having a third layer including .drive teeth intended to engage positively with drive elements, on the other hand, it is preferred to bond the first and third layers between successive teeth so as to obtain adequate strength.Preferably the third layer is slightly narrower than the other two.
In the case of a belt comprising three layers the stiffness of the assembly will depend upon the "phase relationship" between the pitches of the projections of the other two layers, and of course on the relative sizes and frequencies of the projections, and thus belts having different degrees of flexibility can be produced by varying these factors.
The invention will be further described, by way of example only, with reference to the accompanying drawings, in which: Figure 1 is a vertical cross-section through a composite conveyor belt taken along the line I-I of Figure 2; Figure 2 is a plan view of the belt of Figure 1; Figure 3 is a cross-section along the line Ill-Ill of Figure 2; and Figure 4 is a partial perspective view of a modified form of belt.
The belt shown is intended particularly for use in the "mass-flow elevator" section of a cigarette conveying system, and is about 5cm.
wide. It comprises three layers of polyester each about 0.014" (0.35 mm.) in thickness. The central layer 2 is plain, while the upper layer 4 is formed with rounded projections 6 which take the form of elongate "bubbles" extending across the width of the web almost as far as the edges, but leaving a narrow margin 8 along each edge, which in this example is 2-3 inches wide. These projections may for ex ample be formed by pressing the web between a pair of co-operating shaped formers which are heated to set the web to the desired shape.
Although the projections 6 are shown as having completely spherical closed ends, it will be appreciated that the extreme ends may be of various shapes and in particular may be left open, particularly if it is desired to in crease the flexibility of the finished belt, so long as the ends of the upper surface of each projection are curved downwardly towards the belt so as to avoid leaving any sharp edges in positions where they might damage the articles to be conveyed. One example of such an alter native end shape is shown in Figure 4.
The lower layer 10 is narrower than the other two by about 4--6 mm. and is formed with a series of drive-engaging teeth 12 which can be produced simply by corrugating the web between a pair of suitably-shaped rolls, which may also be heated, although it is also possible to set the polyester material to a desired shaped while cold, using suitable forming tools.
Altematively the teeth may be formed, either hot or cold, using a single or multi-toothed reciprocating tool. Another method of producing projections (of whatever shape) is to apply high frequency electrical heating only to the areas to be deformed, using suitable shaped probes or electrodes on each side of the layer; or the H.F. heating may be applied to the whole layer immediately before forming in a conventional manner, to soften it. Such heating may also be used for bonding the layers together.
In assembling the belt shown, the "toothed" layer 10 is first bonded to the substrate layer 2, by applying an ultrasonic bonding tool to the opposite sides of the two layers at each side of each tooth, e.g. along the lines 14 of Figure 2. A margin 18 of 2-3 mm. is left along each edge of the layer 2 (the web 10 being 46 mm. narrower), and thus allows the upper layer 4 to be subsequently bonded onto the assembly by its edges, by simply running a suitable bonding tool continuously along the margin 8.
By arranging the respective ends of the three webs in different positions around the assembly, the problem of jointing the ends is considerably reduced, because they can simply be bonded to the adjustment web. For example, in the case of layer 4 the ends may be positioned as indicatad at 16, and each end can be separately bonded to the underlying layer 2.
WHAT WE CLAIM IS:- 1. A conveyor belt for conveying delicate rod-like articles in a direction transverse to their lengths, comprising a first layer of flexible material forming a substrate, and a second layer of flexible material bonded to one surface of the first layer, the second layer having a series of integrally-formed rounded projections adapted to engage articles to be conveyed, the projections being elongated transversely of the belt to extend substantially parallel to the articles to be conveyed and having rounded ends so that the projections have no sharp edges which might damage the articles.
2. A conveyor belt according to claim 1 further comprising a third layer of flexible material which is deformed in such a way as to form projections adapted to engage drive teeth, which third layer is bonded to the other surface of the first layer.
3. A conveyor belt according to claim 1 or claim 2 in which the layers are formed from a single continuous length of material having projections formed along a part or parts of its length, the material then being convoluted to form the layers.
4. A conveyor belt according to claim 1 or claim 2 in which the layers comprise separate webs of material which are staggered relative to one another along the belt so that their ends do not coincide, the ends of each web being
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (9)

  1. **WARNING** start of CLMS field may overlap end of DESC **.
    strate) layer by forming a continuous bond all along their co-extensive edges, in a known fashion e.g. thermally or ultrasonically. In the case of a belt having a third layer including .drive teeth intended to engage positively with drive elements, on the other hand, it is preferred to bond the first and third layers between successive teeth so as to obtain adequate strength. Preferably the third layer is slightly narrower than the other two.
    In the case of a belt comprising three layers the stiffness of the assembly will depend upon the "phase relationship" between the pitches of the projections of the other two layers, and of course on the relative sizes and frequencies of the projections, and thus belts having different degrees of flexibility can be produced by varying these factors.
    The invention will be further described, by way of example only, with reference to the accompanying drawings, in which: Figure 1 is a vertical cross-section through a composite conveyor belt taken along the line I-I of Figure 2; Figure 2 is a plan view of the belt of Figure 1; Figure 3 is a cross-section along the line Ill-Ill of Figure 2; and Figure 4 is a partial perspective view of a modified form of belt.
    The belt shown is intended particularly for use in the "mass-flow elevator" section of a cigarette conveying system, and is about 5cm.
    wide. It comprises three layers of polyester each about 0.014" (0.35 mm.) in thickness. The central layer 2 is plain, while the upper layer
    4 is formed with rounded projections 6 which take the form of elongate "bubbles" extending across the width of the web almost as far as the edges, but leaving a narrow margin 8 along each edge, which in this example is 2-3 inches wide. These projections may for ex ample be formed by pressing the web between a pair of co-operating shaped formers which are heated to set the web to the desired shape.
    Although the projections 6 are shown as having completely spherical closed ends, it will be appreciated that the extreme ends may be of various shapes and in particular may be left open, particularly if it is desired to in crease the flexibility of the finished belt, so long as the ends of the upper surface of each projection are curved downwardly towards the belt so as to avoid leaving any sharp edges in positions where they might damage the articles to be conveyed. One example of such an alter native end shape is shown in Figure 4.
    The lower layer 10 is narrower than the other two by about 4--6 mm. and is formed with a series of drive-engaging teeth 12 which can be produced simply by corrugating the web between a pair of suitably-shaped rolls, which may also be heated, although it is also possible to set the polyester material to a desired shaped while cold, using suitable forming tools.
    Altematively the teeth may be formed, either hot or cold, using a single or multi-toothed reciprocating tool. Another method of producing projections (of whatever shape) is to apply high frequency electrical heating only to the areas to be deformed, using suitable shaped probes or electrodes on each side of the layer; or the H.F. heating may be applied to the whole layer immediately before forming in a conventional manner, to soften it. Such heating may also be used for bonding the layers together.
    In assembling the belt shown, the "toothed" layer 10 is first bonded to the substrate layer 2, by applying an ultrasonic bonding tool to the opposite sides of the two layers at each side of each tooth, e.g. along the lines 14 of Figure 2. A margin 18 of 2-3 mm. is left along each edge of the layer 2 (the web 10 being 46 mm. narrower), and thus allows the upper layer 4 to be subsequently bonded onto the assembly by its edges, by simply running a suitable bonding tool continuously along the margin 8.
    By arranging the respective ends of the three webs in different positions around the assembly, the problem of jointing the ends is considerably reduced, because they can simply be bonded to the adjustment web. For example, in the case of layer 4 the ends may be positioned as indicatad at 16, and each end can be separately bonded to the underlying layer 2.
    WHAT WE CLAIM IS:- 1. A conveyor belt for conveying delicate rod-like articles in a direction transverse to their lengths, comprising a first layer of flexible material forming a substrate, and a second layer of flexible material bonded to one surface of the first layer, the second layer having a series of integrally-formed rounded projections adapted to engage articles to be conveyed, the projections being elongated transversely of the belt to extend substantially parallel to the articles to be conveyed and having rounded ends so that the projections have no sharp edges which might damage the articles.
  2. 2. A conveyor belt according to claim 1 further comprising a third layer of flexible material which is deformed in such a way as to form projections adapted to engage drive teeth, which third layer is bonded to the other surface of the first layer.
  3. 3. A conveyor belt according to claim 1 or claim 2 in which the layers are formed from a single continuous length of material having projections formed along a part or parts of its length, the material then being convoluted to form the layers.
  4. 4. A conveyor belt according to claim 1 or claim 2 in which the layers comprise separate webs of material which are staggered relative to one another along the belt so that their ends do not coincide, the ends of each web being
    fastened in position by bonding them to the surface of an adjacent web.
  5. 5. A conveyor belt according to any preceding claim in which the layers are made of polyester.
  6. 6. A conveyor belt according to any preceding claim in which the projections are formed before assembly by passing the respective layer between a pair of forming rolls, or by pressing said layer between reciprocating forms, or by the application of differential fluid pressure.
  7. 7. A conveyor belt according to claim 2 in which the first and second layers are substantially equal in width and the projections of the second layer extend across the width of the layer but stop short of the marginal edges, the first and second layers being joined along the edges.
  8. 8. A conveyor belt according to claim 7 in which the projections of the third layer extend right across its width and the third layer is bonded to the first layer in the regions between the projections and is narrower than the first and second layers, so as to allow the first and third layers to be joined before the second layer is added to the assembly.
  9. 9. A conveyor belt substantially as herein described with reference to Figures 1-3 or Figure 4 of the accompanying drawings.
GB21996/78A 1978-05-24 1978-05-24 Conveyor belt Expired GB1601061A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB21996/78A GB1601061A (en) 1978-05-24 1978-05-24 Conveyor belt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21996/78A GB1601061A (en) 1978-05-24 1978-05-24 Conveyor belt

Publications (1)

Publication Number Publication Date
GB1601061A true GB1601061A (en) 1981-10-21

Family

ID=10172247

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21996/78A Expired GB1601061A (en) 1978-05-24 1978-05-24 Conveyor belt

Country Status (1)

Country Link
GB (1) GB1601061A (en)

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee