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
  • 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
  • B29C66/45—Joining of substantially the whole surface of the articles
• • 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
  • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
• • 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
  • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
  • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
  • B29C66/731—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the intensive physical properties of the material of the parts to be joined
  • B29C66/7315—Mechanical properties
  • B29C66/73151—Hardness
  • B29C66/73152—Hardness of different hardness, i.e. the hardness of one of the parts to be joined being different from the hardness of the other part
• • 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
  • B29C66/812—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
  • B29C66/8126—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
  • B29C66/81264—Mechanical properties, e.g. hardness
• • 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
  • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
  • B29C66/824—Actuating mechanisms
  • B29C66/8242—Pneumatic or hydraulic drives
• • 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
  • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
  • B29C66/83411—Roller, cylinder or drum types
  • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H18/00—Winding webs
  • B65H18/08—Web-winding mechanisms
  • B65H18/14—Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H27/00—Special constructions, e.g. surface features, of feed or guide rollers for webs
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
• • 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
  • B29C33/00—Moulds or cores; Details thereof or accessories therefor
  • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
  • B29C33/40—Plastics, e.g. foam or rubber
  • B29C33/405—Elastomers, e.g. rubber
• • 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
  • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
  • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
  • B29C66/721—Fibre-reinforced materials
  • B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
• • 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
  • B29C66/812—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
  • B29C66/8124—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the structure of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
  • B29C66/81241—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the structure of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps being porous or sintered
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
  • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
  • B29K2995/0037—Other properties
  • B29K2995/007—Hardness
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2009/00—Layered products
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/32—Wheels, pinions, pulleys, castors or rollers, Rims
  • B29L2031/324—Rollers or cylinders having an axial length of several times the diameter, e.g. embossing, pressing or printing
  • B29L2031/326—Rollers or cylinders having an axial length of several times the diameter, e.g. embossing, pressing or printing made wholly of plastics
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2404/00—Parts for transporting or guiding the handled material
  • B65H2404/10—Rollers
  • B65H2404/13—Details of longitudinal profile
  • B65H2404/131—Details of longitudinal profile shape
  • B65H2404/1316—Details of longitudinal profile shape stepped or grooved
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2404/00—Parts for transporting or guiding the handled material
  • B65H2404/10—Rollers
  • B65H2404/18—Rollers composed of several layers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2404/00—Parts for transporting or guiding the handled material
  • B65H2404/10—Rollers
  • B65H2404/18—Rollers composed of several layers
  • B65H2404/185—Rollers composed of several layers easy deformable
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2404/00—Parts for transporting or guiding the handled material
  • B65H2404/40—Shafts, cylinders, drums, spindles
  • B65H2404/43—Rider roll construction

Definitions

• the invention pertains to a winding arrangement for a web of paper or the like, for which at least one drum rests against the winding roll to be wound as a carrier, backup or load drum with a portative drum body having a cylindrical outer circumference, a radially deformable intermediate layer of elastomeric material, attached to the outer circumference of the drum body and a cylindrical run casing attached to the outer surface of the intermediate layer concentric with the axis of the drum body, of a material sever- al millimeters thick which can be elastically deformed under contact pressure, such that the run casing cannot be, or can scarcely be deformed in an axial direction by the weight of the winding with which it is in contact, such that the run casing is also indented in a radial direction lateral to the support region influencing the windup roll.
• the invention pertains to a corresponding drum itself.
• the latter prevents that due to fluctuations in the thickness profile of the web being wound extreme variations in diameter may develop in relatively narrow zones of the windup roll over the width of the roll, as with a softer surface.
• Grooves placed on the radial outer surface of the soft intermediate layer enable a certain compressibility of the intermediate layer and prevent an excessive piling of the drum covering, and thus prevent surface strains in the drum covering in the nip and changes in the tension of the web material caused by said piling. Without grooves, the drum covering would yield, due to the pressure, in the nip in the peripheral direction. Thereby, a drum covering would receive an elastic deformation which can cause a substantial change in web tension.
• Elastomeric material used for the intermediate layer such as rubber, polyurethane or the like are more or less not compressible without inclusion of compressible agents such as air. In principle, however, grooving or other inclusion of gas in an intermediate layer can be omitted; that is, if the production of additional tension in the web material is expressly desired.
• the underlying purpose of the invention is to find, for the intermediate layer and run casing of a generic drum for a generic winding arrangement, a material pairing which permits a comparatively simple manufacture of the drum coating and which, for use, enables a simple accommodation of the mechanical properties of the intermediate layer and run casing.
• This problem is solved with respect to a winding arrangement of this generic class and also with respect to a drum of this generic class by a run casing composed of elastomer- ic material, which is radially elastically deformable and has a hardness two to one-hundred times the hardness of the material radially elastically deformable intermediate layer, the material of the intermediate layer being in general in compressible and the intermediate layer comprising cavities or void spaces being distributed over its circumference and making the intermediate layer, as a whole, compressible.
• the materials used for the intermediate layer and for the run casing as such are more or less incompressible.
• the intermediate layer material having itself a lower hardness than the run casing material and including the cavities in the intermediate layers makes the intermediate layers, as a whole, becoming compressible.
• the intermediate layer and run casing can be composed of the same or different base materials, e. g., of rubber, polyrethane, or similar elastomeric materials.
• the intermediate layer is provided with cavities or void spaces, such that the intermediate layer, as a whole, becomes compressible.
• the cavities can be realized in the form of coarser and/or finer pores, on average uniformly distributed over the circumference, which contain air, for example.
• recesses e.g., grooves, in particular, helicoidal grooves, as known in principle from DE-Al-40 35 054, on the outer circumference of the intermediate layer.
• the intermediate layer To divide of the intermediate layer into a radial inner incompressible layer and a radial outer layer, provided with cavities and therefore becoming compressible, has proven to be particularly advantageous.
• the intermediate layer can also totally consist of said web-like or fin-like elements in form or rings or in form of a not too steep helix being axially spaced by leaving void spaces between them.
• a radial outer co - pressible partial layer of the intermediate layer are, in particular, one or more layers of expanded material, with the pore size and/or distribution capable of forming a gradient in the radial direction.
• an intermediate layer which in itself is built up of several layers, with the radial inner part, in essence incompressible, capable of being composed of one or more layers of an elastomeric ate- rial having the desired hardness, whereas the radially outer, compressible region of the intermediate layer can be initially independent and also composed of several layers, with the layer material used and, as such, incompressible, itself featuring the desired hardness - with, however, this part of the intermediate layer having, as a whole, i.e., including its cavities, a less hardness and being compressible.
• Both the potentially several partial layers of the intermediate layer together and the intermediate layer and the run casing as well as, if necessary, the intermediate layer and the drum body, after being mutually attached in order to form a drum covering, can be interconnected subse- quently or simultaneously by means of vulcanization.
• Layers of coupling agent suitable for this purpose can be deposited in advance on the surface for later contact. For example, an interconnection of the layers can also be achieved by subsequent heating.
• elastomeric material can be charged as a foam between the incompressible layers of the intermediate layer and run casing in order to harden afterwards.
• a foam material can also be applied advantageously if recesses in the outer circumference of the intermediate layer are filled with a relative soft foam to ease to apply the run casing onto the intermediate layer.
• the deflection resistance of a run casing parallel to the drum axis can be increased by means of a fiber reinforcement, e.g., by means of carbon fiber incorporated roughly parallel to the axis.
• a reinforcing element, fiber in particular is provided, which is oriented essentially in the direction of the periphery.
• a winding arrangement and a drum in accordance with the invention have - amongst others - the advantage of being manufactured more simply than a metal run casing as known from DE-A1-4 , 035 , 054.
• a run casing can be connected to an intermediate layer in a non-positive connection by means of vulcanization, with the material of the run casing being produced as an oblong belt from which a length corresponding to the periphery of the casing is severed.
• This causes a seam to arise in the forming of a surrounding casing, which seam, for its part, can be closed in a non- positive manner by adhering, vulcanizing or the like.
• a non-positive connection between an intermediate layer and run casing leads to favorable properties during operation of the drum, since the material layers of intermediate layer and run casing, on the basis of the material pairing, do not shift or otherwise detach with respect to each other, even with long use.
• the mechanical properties of the new material pairing can be varied within a wide range, e.g., by means of placing recesses such as grooves in the surface by means of gas inclusions - hence, in general, by means of a porous material layer or by varying the material hardness and/or material thickness.
• the expansion behavior and flexural behavior of the intermediate layer easily adapt to the run casing.
• Figure 1 A winding arrangement, schematically simplified, for winding rolls from material in the form of a web, paper in particular, by means of two carrier drums - in end view;
• Figure 2 An alternative embodiment of the winding arrange- ment in accordance with Figure 1;
• Figure 3 From the winding arrangement in accordance with Figure 1 or 2, part of a carrier drum in axial section - cut along line III-III in accordance with Figure 4 ;
• Figure 4 The same carrier roll as in Figure 3, in section along line IV-IV with a paper roll supported thereupon.
• Figure 1 represents a double carrier drum winding arrangement 20, which serves to wind a paper web 1 to a winding 2.
• the material web 1 is fed under a certain longitudinal web tension. It wraps around, from below, a driven, first carrier drum 4 in the web running direction, having a horizontal axis, next to which a second carrier drum 5 is arranged at the same height, or, as represented in the embodiment and preferred in this respect, at an unequal height with a clearance which permits the development of a winding bed for the roll 2 to be wound.
• the drums 4, 5, 11 influence, by means of their surface behavior, the winding hardness of the roll 2.
• the first carrier drum 4 in the web running direction features a drum covering, non-rigid in a radial elastic deformable sense, the cross section and longitudinal section of which are explained in greater detail in connection with Figures 3 and 4.
• a drum 4 is composed, in essence, of a portative drum body 24 of steel or another very deflection-resistant material, e.g., fiber-reinforced plastic, such as carbon-fiber-reinforced plastic with a bearing journal 23.
• An radially elastically compressible intermediate layer 26 of elastomeric material is attached to the cylindrical outer circumference 25 of the drum body 24, if necessary with the addition of an intermediate layer of bonding agent 22.
• an additional radially elastic layer of an elastomeric material and several millimeters thick is attached to the preferably cylindrical outer circumference of the intermediate layer 26. This layer forms a circular cylindrical run casing 33 on the outer circumference.
• One of the essential differences between the intermediate layer 26 and run casing 33 consists in the varying hardness of the material used, with the hardness of the run casing capable of being two to one-hundred times as great as the hardness of the intermediate layer. It is preferable for the intermediate layer to have a PJ (Pussey Jones) value of 80-110 (hardness measure of a P & J Plastometer) and preferable for the thickness of the intermediate layer to be between 10 and 20 mm. In contrast, it is preferable for the PJ value of the run casing to be 5-15 and for the thickness of the running casing to be 5-15 mm. In this regard, an overall thickness of both radially elastic layers of elastomeric material of 20-30 mm, preferably approximately 25 mm, is particularly preferred.
• the lateral groove clearance is preferably between 6 and 15 mm, but can also be of a size similar to the groove depth, as in the embodiment .
• grooves 37 are provided also on the radial outer surface of the run casing 33, hence, the running surface. As a rule, however, such an effect is not desirable for a run casing. Grooves 37 nevertheless provided on its outer surface principally must serve a different function, namely, that of air discharge grooves, such that air cushions which influence the frictional behavior between a material web wrapping around a drum and the surface of the drum cannot form between both materials.
• the width and depth and distance between these grooves 37 are provided somewhat smaller than for the grooves 27 of the intermediate layer.
• Suitable for a low-friction layer is, e.g., a Teflon coating, which can be deposited by spraying onto the running surface. Other low-friction materials can also be used. A typical thickness of a low-friction layer is between 0.05 and 2 mm, although it can be less thick. Varying roll-coating materials can also be used to wind different web-like materials. As a rule, material webs of paper, film and the like can be wound with the same surface coating, for example. Teflon.
• a nip roller 14 can be provided such that an incoming material web 1 is pressed against the carrier drum 4 around which it wraps . Among other things , this can enlarge the effective range for influencing the amount of stretch which can be wound in.
• the nip roller 14 can also feature a roller covering in accordance with the invention . List of reference numbers

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
• Winding Of Webs (AREA)
• Paper (AREA)
• Storage Of Web-Like Or Filamentary Materials (AREA)
• Rolls And Other Rotary Bodies (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=7799364

Family Applications (1)

Country Status (7)

Families Citing this family (6)

Family Cites Families (8)

• 1996
  • 1996-07-10 DE DE1996127677 patent/DE19627677A1/de not_active Withdrawn
• 1997
  • 1997-07-10 BR BR9710293A patent/BR9710293A/pt not_active Application Discontinuation
  • 1997-07-10 AU AU36216/97A patent/AU3621697A/en not_active Abandoned
  • 1997-07-10 WO PCT/EP1997/003647 patent/WO1998001382A2/en not_active Ceased
  • 1997-07-10 CA CA 2259651 patent/CA2259651A1/en not_active Abandoned
  • 1997-07-10 JP JP50480998A patent/JP2000514025A/ja active Pending
  • 1997-07-10 EP EP19970932796 patent/EP0912437A2/de not_active Withdrawn

Non-Patent Citations (1)

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