EP0924153B1 - Flasque pour bobine - Google Patents

Flasque pour bobine Download PDF

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Publication number
EP0924153B1
EP0924153B1 EP98204295A EP98204295A EP0924153B1 EP 0924153 B1 EP0924153 B1 EP 0924153B1 EP 98204295 A EP98204295 A EP 98204295A EP 98204295 A EP98204295 A EP 98204295A EP 0924153 B1 EP0924153 B1 EP 0924153B1
Authority
EP
European Patent Office
Prior art keywords
core
flange
roll
strip material
flanges
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 - Lifetime
Application number
EP98204295A
Other languages
German (de)
English (en)
Other versions
EP0924153A1 (fr
Inventor
Wilfried Muylle
Dirk Peeters
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.)
Agfa Gevaert NV
Original Assignee
Agfa Gevaert NV
Agfa Gevaert AG
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 Agfa Gevaert NV, Agfa Gevaert AG filed Critical Agfa Gevaert NV
Priority to EP98204295A priority Critical patent/EP0924153B1/fr
Publication of EP0924153A1 publication Critical patent/EP0924153A1/fr
Application granted granted Critical
Publication of EP0924153B1 publication Critical patent/EP0924153B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/18—Constructional details
    • B65H75/22—Constructional details collapsible; with removable parts
    • B65H75/2218—Collapsible hubs
    • B65H75/2227—Collapsible hubs with a flange fixed to the hub part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/18—Constructional details
    • B65H75/185—End caps, plugs or adapters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/18—Constructional details
    • B65H75/22—Constructional details collapsible; with removable parts
    • B65H75/2254—Constructional details collapsible; with removable parts with particular joining means for releasably connecting parts
    • B65H75/2272—Constructional details collapsible; with removable parts with particular joining means for releasably connecting parts releasably connected by relative rotatable movement of parts, e.g. threaded or bayonet fit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/50—Storage means for webs, tapes, or filamentary material
    • B65H2701/51—Cores or reels characterised by the material
    • B65H2701/512—Cores or reels characterised by the material moulded
    • B65H2701/5122—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
    • B65H2701/00—Handled material; Storage means
    • B65H2701/50—Storage means for webs, tapes, or filamentary material
    • B65H2701/51—Cores or reels characterised by the material
    • B65H2701/515—Cores or reels characterised by the material assembled from parts made of different materials
    • B65H2701/5152—End flanges and barrel of different material
    • B65H2701/51524—Paperboard barrel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/50—Storage means for webs, tapes, or filamentary material
    • B65H2701/51—Cores or reels characterised by the material
    • B65H2701/515—Cores or reels characterised by the material assembled from parts made of different materials
    • B65H2701/5152—End flanges and barrel of different material
    • B65H2701/51526—Metal barrel

Definitions

  • the present invention relates to the attachment of a flange to a core.
  • the invention is related to the attachment of a flange to a core on which a roll of material is wound.
  • Light-sensitive strip material e.g. photographic film or paper, a polyester printing plate, or another light-sensitive strip material
  • Light-sensitive strip material can be packaged light-tightly by winding it as a coil on a hollow supporting core, and by attaching a rigid, opaque flange to each end of the core, thus forming a light-tightly packaged roll.
  • the diameter of the flanges is preferably larger than the diameter of the coiled material.
  • a flexible circumferential cover may be secured to the coiled strip material and may cover the coiled strip material by a few complete coils.
  • the circumferential cover has a width in excess of the coiled strip material.
  • the side ends of the circumferential cover may slope slightly upwards where they touch the flanges.
  • the package as described above is reliably light-tight.
  • Such a package is used e.g. for recording film marketed by Agfa-Gevaert N.V.
  • the flanges 20 in such a package have a slightly conical hub 23 having outside ribs 24 approximately parallel to the axis 26 of the flange 20.
  • the flanges 20 are pressed into the hollow core 10 and remain attached to the core 10 because of a press fit, i.e. the outside diameter of the hub 23 including the ribs 24 is larger than the inside diameter of the core 10.
  • the ribs 24 serve two purposes: keeping the flanges 20 attached to the core 10 on the one hand, and preventing the flanges 20 to rotate with respect to the core 10 on the other hand. The latter is required because the roll is driven via the flanges 20 in some cooperating apparatuses in which the roll is placed. Usually, these cooperating apparatuses dispense light-sensitive strip material from the roll.
  • the attachment of the flanges to the core described above presents a problem of reliability.
  • the attachment is not reliable because the dimensional tolerances of the flanges and the core are critical.
  • a flange may become detached from the core due to shocks during shipping, or due to relaxation of the core (the core is usually made of cardboard) or by someone lifting the roll by one of its flanges, etc. If a flange becomes detached, the light-sensitive strip material is exposed, whereby the roll is wasted.
  • Patent FR-A-1 236 361 discloses a coupling part that supports a roll of strip material; the coupling part will be referred to as "flange" below.
  • the flange 20 has in the direction of its axis 26 a number of triangular protrusions 25 that are slightly inclined at the side of the centre of the roll and steeply inclined at the side of the end of the roll. In this way, the flange 20 can be inserted into the hollow, cardboard core 10 of the roll, and, once attached, cannot be removed from the core without damaging the core. Because of the protrusions 25, the core 10, and thus also the roll, cannot rotate with respect to the flange 20.
  • such flanges are made of plastic, e.g. of polystyrene. Because of environmental considerations, it is highly desirable that the flanges can be removed easily from the roll, so that they can be re-used or recycled after the use of the roll.
  • flanges are disclosed that are used during shipping of rolls of e.g. textile fabric or material for carpets.
  • the fabric is wound onto a core, that is made of cardboard.
  • two identical flanges are inserted, one flange into each end of the core.
  • the roll is shipped; when the roll is handled, e.g. by a forklift truck or another machine, it can now be handled by means of the flanges, so that damage to the roll is avoided; this is the purpose of the flanges.
  • the flanges must be removed from the core, since the core is put directly onto the equipment.
  • FIGS 3a and 3b show a flange 20 as disclosed in this document; Fig. 3a is a side view, partially showing a section, and Fig. 3b is a top view.
  • the flange 20 has a disc portion 21 and a hub portion 23.
  • the hub portion 23 contains screw thread 30 in the hub area near the disc portion 21; the screw thread has a steep slope (which corresponds to a small angle ⁇ in Fig. 4) so that a very large force is required to pull a flange out of the core in which it is inserted.
  • the end 27 of the hub portion 23 that is away from the disc portion 21 has a sharp chamfer.
  • the disc portion has either protruding elements 28 or holes 29.
  • a flange 20 is inserted into a core 10 (not shown in Figures 3a and 3b) as follows. First, the chamfered end 27 of the hub portion 23 of the flange is pressed into the core and then the rest of the hub portion 23, as far as the start of the screw thread 30. Then, the remaining portion of the hub portion 23, i.e. the portion containing the screw thread 30, is screwed into the core by means of a tool.
  • the tool includes a lever, so that a high torque can be applied; the tool either has holes that fit into the protruding elements 28 of the disc portion 21 or has protruding elements that fit into the holes 29 of the disc portion 21.
  • the core does not contain screw thread; when screwing the flange 20 into the core, a screw thread is cut or pressed into the core that corresponds to the screw thread 30 of the flange 20.
  • the same tool is used to screw the flange out of the core.
  • This system presents the disadvantages that large forces have to be applied and that a special tool is required to insert a flange into the core and to remove it from the core.
  • Fig. 4 shows a "helix" 32.
  • a helix is also known as a screw line; a corkscrew has a helical shape.
  • the helix angle ⁇ as shown in Fig.
  • a “helical protrusion” is a protrusion or a plurality of protrusions substantially arranged on a helix; to exclude the special cases mentioned above, the helix angle ⁇ is limited to 0.1° ⁇ ⁇ ⁇ 89.9° or -89.9° ⁇ ⁇ ⁇ -0.1°.
  • the protrusion may be long, spanning e.g. a complete revolution of the helix around the cylinder or cone (with ⁇ t varying from 0° to 360°).
  • Such a helical protrusion is in fact a screw thread or a portion of screw thread (see also Fig. 4).
  • the protrusion may also be short, having a length of e.g. a few mm (see also Fig. 5).
  • Each protrusion may have any length, from a few mm or less, to a length corresponding to several revolutions of the helix.
  • a curve S and an angle ⁇ are associated with the protrusion(s) as follows.
  • Curve S shown in Fig. 5, is the curve on which the protrusion lies; it is defined as the curve on the cylinder or cone lying half-way between the curves S1 and S2 where the protrusion touches the cylinder or cone on which it lies, S1 and S2 being curves in the longitudinal direction of the protrusion.
  • the angle ⁇ of curve S is defined in the same way as a helix angle ⁇ , i.e. ⁇ is the angle between S and a plane perpendicular to the axis 26 of the cylinder or cone on which S lies. For a helix, however, ⁇ is constant, whereas ⁇ may vary.
  • a “pure torque” is a torque without axial pulling or pushing force, i.e. without a force-component parallel to axis 26 in Figures 4 and 5.
  • removing a flange 20 from a core 10 by means of a “pure torque” means that upon the flange 20 first a torque is exerted without axial pulling or pushing force, followed by exerting a small axial pulling or pushing force upon the flange 20; "small” means that the force is smaller than ten times the weight of the flange 20, preferably smaller than five times the flange weight, more preferably smaller than twice the flange weight. The cause of this small axial force may be the following. If a core 10 is oriented vertically (as shown in Fig.
  • a flange 20 can be removed from a core 10 by exerting a "pure torque" upon the flange 20, but of course the operator who removes the flange 20 may also exert an axial pulling or pushing force, although this axial force is not required. What is important for the invention is that the flange 20 may be removed by means of a pure torque; of course the operator can exert other forces upon the flange at the same time, even although these forces are not required to remove the flange.
  • removing "manually" a flange from a core is meant that the operator can remove the flange by contacting the flange directly with a hand, without using any tools such as e.g. a screwdriver.
  • removing a flange "manually" from a core means that the torque exerted upon the flange by the operator is not higher than 30 Nm, preferably lower than 20 Nm, more preferably lower than 15 Nm, still more preferably lower than 10 Nm and most preferably lower than 8 Nm.
  • the "right-handed screw convention” is the following convention in mathematics (see also "Webster's Third New International Dictionary", 1993): if linear motion is produced perpendicular to a plane by a rotation in the plane in a given rotation sense, the direction of the linear motion will be that of the usual motion along its axis of a right-handed screw with axis perpendicular to the plane and with the given rotation sense in a resisting medium.
  • the flange can be replaced by a right-handed screw and the core by a resisting medium in which the screw is inserted.
  • the combination of the given removal direction and the given rotation sense has a positive sign according to the right-handed screw convention, if a torque with the given rotation sense, when exerted upon a right-handed screw, removes the screw from the resisting medium in the same given removal direction. If, in order to produce the same removal direction, the flange has to be replaced by a left-handed screw, then the combination of torque rotation sense and removal direction is negative according to the right-handed screw convention.
  • F in is the force required to press the flange axially into the core
  • F out is the force required to pull the flange axially out of the core.
  • FIGS 1 to 3 show prior art flanges that were extensively described hereinbefore.
  • Flange 20 in Fig. 1 is pressed into core 10 at a first end 11 of the core.
  • Flange 20 has a disc portion 21 and a slightly conical hub portion 23 comprising outside ribs 24 in the direction of the axis 26 of the flange.
  • Fig. 2 shows a flange 20 that has a hub portion 23 comprising triangular protrusions 25 in the direction of the axis of the flange; the protrusions are steeply inclined at the side of the disc portion 21 and slightly inclined at the opposite side.
  • Figures 3a and 3b show a prior art flange, having screw thread 30 and a chamfered end 27, that must be inserted into a core (not shown) by means of a special tool.
  • Fig. 7 shows a schematical representation of a roll 80, standing on the floor.
  • Strip material 60 is coiled on core 10; a circumferential cover 61 is secured to the coiled strip material 60 as explained hereinbefore.
  • a first flange 20, having a disc portion 21 and a hub portion 23, is attached to the core 10 at a first core end 11, and a second flange 40, having a disc portion 41 and a hub portion 43, is attached to the core 10 at the opposite end 12 of the core.
  • the strip material 60 is light-tightly packaged, as explained hereinbefore.
  • Fig. 4 and Fig. 5 show different embodiments of a flange 20 according to the current invention.
  • Fig. 4 shows a flange having a disc portion 21 and a hub portion 23.
  • the flange is hollow: the disc 21 has an inner diameter 22.
  • Two helical protrusions 30 and 31 are formed on hub 23. Each helical protrusion is long and continuous, as opposed to the short, discrete protrusions in Fig. 5.
  • the helical protrusions in Fig. 4 are in fact screw thread.
  • Helical protrusion 30 is arranged on a first helix 32 having a helix angle ⁇ and helical protrusion 31 is arranged on a second helix 33.
  • Core 10 preferably has a smooth inner surface, without protrusions or recesses: no internal screw thread in the core is required.
  • Fig. 5 shows a non-hollow flange 20 having discrete protrusions 30 arranged on a helix 32.
  • the discrete protrusions may be short portions of screw thread.
  • the flange can be inserted into the core by pressing or screwing and can be removed from the core by exerting a pure torque around the axis 26 upon the flange, i.e. a torque without extra pulling force in the direction of the axis 26.
  • the helical protrusions convert the torque - i.e. the forces applied in a rotational direction - into a translational movement of the flange, in the direction of the axis 26.
  • each discrete protrusion is preferably slightly chamfered in the unscrewing direction, to ease rotational removal of the flange.
  • the flange can easily be removed without damaging the core.
  • Fig. 6 shows different embodiments of a cross section of a core and a flange inserted in the core; only a portion of the helical protrusion 30 and a portion of the core 10 are shown.
  • the cross sections are obtained by cutting the helical protrusion and the core by a meridian plane, i.e. a plane through the axis 26 of the hub 23 of the flange 20.
  • the angle ⁇ is the angle between the helical protrusion 30 and the core 10 at the side of the centre of the core; ⁇ is the angle between the helical protrusion 30 and the core 10 at the side of the end 11 of the core.
  • angle ⁇ ⁇ ⁇ so that the helical protrusion functions as a barb, requiring a large force to pull the flange 20 axially out of the core 10 and only a small force to press the flange into the core.
  • angle ⁇ > ⁇ and the helix angle ⁇ is so small that a large force is required to pull the flange 20 axially out of the core 10.
  • a strip material 60 may be coiled on the core 10.
  • the strip material 60 is light-sensitive.
  • a flexible circumferential cover 61 is secured to the strip material 60 and shields the strip material 60 from light, as explained hereinbefore.
  • a roll 80 as shown in Fig. 7 is manufactured as follows.
  • the flanges 20, 40 are inserted into the core 10 by pressing - according to another method, the flanges are screwed into the core.
  • the strip material is coiled upon the core.
  • the circumferential cover is secured to the strip material and is coiled upon the strip material.
  • the core 10 is hollow over its complete length, as shown in Fig. 7.
  • the core is solid inside and has a hollow portion near its end 11 (see also Fig. 4) so that the hub portion 23 of flange 20 fits into the core 10.
  • flange 20 is hollow over its complete length, as shown in Fig. 4. In another embodiment, shown in Fig. 5, flange 20 is solid. In yet another embodiment, the flange is solid but has a hollow portion at the side of its disc portion 21.
  • a (partly) hollow flange can easier be driven in a cooperating apparatus, because a driven hub can be inserted into the flange.
  • the first flange 20 has a helical protrusion on a right-hand turning helix and the second flange 40 has a helical protrusion on a left-hand turning helix, or vice versa; i.e.
  • the flanges are to be removed from the core by torques exerted upon the flanges, for the first flange 20 the combination of the removal direction of the flange and the rotation sense of the torque has a positive sign according to the right-handed screw convention, while for the second flange 40 the combination has a negative sign according to the right-handed screw convention, or vice versa.
  • the flanges are pushed into the core by the torque applied by the driving motor. If both flanges had identically turning helices, one of the flanges could be unscrewed by the motor torque.
  • hub 23 comprises helical protrusions 30 on two or more helices.
  • Fig. 5 shows discrete, short helical protrusions located on a single helix 32.
  • Fig. 4 shows a first helical protrusion 30 on a first helix 32, and a second helical protrusion 31 on a second helix 33.
  • the helical protrusions may also lie on three or more helices. If a hub contains helical protrusions on two or more helices, preferably these helices have equal or substantially equal helix angles.
  • hub 23 comprises a combination of discrete, short helical protrusions as shown e.g. in Fig. 5 and of long helical protrusions as shown e.g. in Fig. 4.
  • Such a combination of helical protrusions may lie on the same helix or it may lie on two or more helices; the latter case includes e.g. a combination of a long, continuous helical protrusion on a first helix and of discrete, short helical protrusions on a second helix.
  • hub 23 comprises only long, continuous helical protrusions - in fact screw thread - on one or more helices, and hub 23 does not comprise short, discrete helical protrusions.
  • the pitch of the helical protrusion(s) is large enough so that a few turns are sufficient to remove the flange from the core.
  • the pitch is the distance, measured in a meridian plane through the axis 26 of the flange 20, between two adjoining cross sections of helical protrusion(s); the pitch is also the distance that the flange is turned out of the core, when turning the flange by a complete revolution. If the helical protrusion is a screw thread, the pitch of the helical protrusion is equal to the pitch of the screw thread as known in the art.
  • the pitch is so large with respect to the length of the flange, that two complete revolutions or less of the flange suffice to remove it from the core.
  • the helix angle ⁇ is 2° ⁇ ⁇ ⁇ 85°, more preferably 5° ⁇ ⁇ ⁇ 60°, still more preferably 5° ⁇ ⁇ ⁇ 45°.
  • negative ⁇ preferably 2° ⁇ - ⁇ ⁇ 85°, more preferably 5° ⁇ - ⁇ ⁇ 60°, still more preferably 5° ⁇ - ⁇ ⁇ 45°.
  • the flange 20 is made of an opaque polymeric material. In a more preferred embodiment, the flange is made of opaque polystyrene. The flange may also be made of metal.
  • the core 10 may be made of an opaque polymeric material. In a preferred embodiment, the core is made of cardboard.
  • the core is made of a material that is more resilient than the material the helical protrusion is made of.
  • the helical protrusion is made from the same material as the hub portion of the flange, while the core may be made from another material.
  • the characteristics of the composition consisting of the flange 20 and the core 10 are such that the flange 20 can be removed manually from the core 10.
  • the characteristics that are important to allow manual removal are the material properties of both the flange 20 and the core 10, their dimensions and the tolerances on these dimensions.
  • values are given of the characteristics of a composition of a flange and a core in accordance with the present invention, without the intention to limit the invention thereto; the value of the torque that is required to remove the flange from the core is given as well.
  • the most important characteristics are the materials that the core 10 and the helical protrusion on the hub portion 23 of the flange 20 are made from, the internal diameter of the core 10, the external diameter of the hub portion 23 of the flange 20, and the geometry and especially the height of the helical protrusion on the hub portion 23.
  • the outer diameter of the disc portion 21 of the flange 20 is large enough so that the flange 20 can be removed from the core manually, by turning.
  • the maximum diameter of the flange 20 is larger than 40 mm, more preferably larger than 50 mm, still more preferably larger than 60 mm, while the maximum diameter of the flange 20 always remains smaller than 200 mm.
  • the present invention is not limited to the above mentioned embodiments.
  • the strip material (60) that is coiled upon the core (10) need not be light-sensitive; it may e.g. be sensitive to infrared radiation.
  • the strip material (60) is radiation-sensitive, such as photographic or thermographic material.
  • the maximum diameter of the flanges 20 is larger than the diameter of the coiled strip material 60 and the circumferential cover 61.
  • the maximum flange diameter may however be equal to or smaller than the diameter of the coiled strip material; in this case the circumferential cover 61 may be secured to the outside of the flanges, i.e. the side of the disc portion opposite to the side that is turned towards the hub portion.
  • a hub having a conical or cylindrical shape is preferred, but the hub may also have another shape, e.g. a slightly hyperbolical shape, provided it may be inserted into the core by pressing or screwing and it may be removed from the core by exertion of a pure torque.
  • another shape e.g. a slightly hyperbolical shape
  • the flange 20 is pressed into the core 10, but it may also be screwed into the core, by exerting a torque on the flange 20 instead of a pushing force.
  • the flange 20 is directly attached to the core.
  • the flange 20 is attached to the core via another part, e.g. via a ring that is secured to the core at the core end.
  • the flange 20 comprises a disc portion 21 and a hub portion 23 having a helical protrusion 30.
  • the flange 20 comprises a hub portion 23 having a helical protrusion 30, and e.g. a rim. The rim secures a disc, or another part, to the core 10.
  • two flanges in accordance with the present invention are attached to the core.
  • a flange according to the present invention may be attached to the first end 11 of the core, and a flange according to prior art may be attached to the second end 12 of the core.
  • one flange may be attached to the first end 11 of the core, and no flange is attached to the second end 12 of the core.
  • the two flanges that are attached to the core are in accordance with the present invention, and have the same features, with a preferred exception for the helix angle ⁇ : as explained hereinbefore, preferably the first flange has a right-hand turning helix and the second flange a left-hand turning helix, or vice versa.
  • all helical protrusions on a hub have cross sections having the same features, in particular the same angles ⁇ and ⁇ .
  • the helical protrusions may have cross sections with differing features.
  • a flange according to the present invention provides important advantages.
  • the core does not have to comprise protrusions: a simple, inexpensive tube, e.g. made of cardboard, is sufficient.
  • ⁇ > 1 whereby the flanges remain so reliably attached to the core, that the dimensional tolerances on the core may be larger, which means a cheaper core may be used.
  • a light-sensitive strip material on a core with flanges according to the current invention can be packaged light-tightly, and the packaging process can easily be automated.
  • the flanges remain reliably attached to the core during shipping, handling and use of the roll.
  • the flanges can be used to drive the roll in a cooperating apparatus.
  • the flanges can easily be removed, which is an environmental advantage.
  • the flanges can be removed manually. No tool is required to remove the flanges. This is convenient for the user.
  • F in i.e. the force required to press the flange axially into the core
  • F out i.e. the force required to pull the flange axially out of the core
  • ⁇ may be larger than 1 thanks to a good choice of the specific features of the flange, especially the dimension and the angles ⁇ , ⁇ and ⁇ of the helical protrusion.
  • the flange according to the present invention used for the measurement, was part of a roll; the roll and the flange have the following features:

Claims (9)

  1. Composition comprenant :
    un mandrin (10) fabriqué en carton et ayant un diamètre intérieur d, une épaisseur de mandrin, une surface intérieure lisse, un centre et une extrémité (11) ; et
    un flasque (20) fabriqué en matériau polymère et ayant :
    une partie disque (21) ayant un premier diamètre extérieur ; et
    une partie moyeu (23) pour l'adaptation dans le mandrin (10), la partie moyeu (23) ayant un deuxième diamètre extérieur D et une saillie hélicoïdale (30), la saillie hélicoïdale (30) ayant une hauteur h, un angle d'hélice λ, un angle α entre la saillie hélicoïdale (30) et la surface intérieure du mandrin (10) du côté du centre du mandrin (10), et un angle β entre la saillie hélicoïdale (30) et la surface intérieure du mandrin (10) du côté de l'extrémité (11) du mandrin (10) ;
    caractérisée en ce que le premier diamètre extérieur de la partie disque (21) est plus grand que 40 mm et plus petit que 200 mm, les dimensions en mm du diamètre intérieur d du mandrin (10), du deuxième diamètre extérieur D de la partie moyeu (23) et la hauteur h de la saillie hélicoïdale (30) sont telles que la valeur de Dmax - d ≤ 2*d/72 mm, dans lequel Dmax = D + 2*h, et en ce que l'épaisseur du mandrin et les angles λ, α, β de la saillie hélicoïdale (30) sont tels qu'après l'emmanchement de la partie moyeu (23) du flasque (20) dans le mandrin (10), le flasque (20) peut être retiré manuellement du mandrin (10) sans l'utilisation d'un outil.
  2. Composition selon la revendication précédente, ayant une efficacité de force η > 1, η étant le ratio de la force requise pour tirer le flasque (20) axialement hors du mandrin (10), divisé par la force requise pour presser le flasque (20) axialement dans le mandrin (10).
  3. Composition selon l'une quelconque des revendications précédentes, dans laquelle ledit angle α est plus petit que ledit angle β.
  4. Composition selon l'une quelconque des revendications précédentes, comprenant en outre une bobine de matériau en bande (60) enroulé sur le mandrin (10).
  5. Composition selon la revendication précédente, dans laquelle le matériau en bande (60) est sensible aux radiations.
  6. Utilisation d'une composition selon la revendication 5 pour dérouler ladite bande de matériau sensible aux radiations enroulée sur ledit mandrin (10).
  7. Procédé pour fixer le flasque (20) tel que revendiqué dans la revendication 1 au mandrin (10) tel que revendiqué dans la revendication 1, le procédé comprenant l'étape consistant à
    emmancher la portion moyeu (23) du flasque (20) dans le mandrin (10).
  8. Procédé selon la revendication 7, dans lequel le flasque (20) peut être retiré manuellement du mandrin (10) en tournant le flasque d'au moins deux tours complets.
  9. Procédé pour l'emballage d'une bobine de matériau en bande sensible aux radiations (60), le procédé comprenant l'étape de la revendication 7 et comprenant en outre les étapes qui consistent à :
    enrouler la bobine de matériau en bande sensible aux radiations (60) sur le mandrin (10) ;
    fixer un couvercle circonférentiel souple (61) sur le matériau en bande (60) ;
    couvrir le matériau en bande (60) avec le couvercle circonférentiel souple (61) sur quelques tours complets, de telle façon que le matériau en bande soit emballé à l'épreuve de la lumière.
EP98204295A 1997-12-22 1998-12-08 Flasque pour bobine Expired - Lifetime EP0924153B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98204295A EP0924153B1 (fr) 1997-12-22 1998-12-08 Flasque pour bobine

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP97204077 1997-12-22
EP97204077 1997-12-22
EP98204295A EP0924153B1 (fr) 1997-12-22 1998-12-08 Flasque pour bobine

Publications (2)

Publication Number Publication Date
EP0924153A1 EP0924153A1 (fr) 1999-06-23
EP0924153B1 true EP0924153B1 (fr) 2003-02-26

Family

ID=26147203

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98204295A Expired - Lifetime EP0924153B1 (fr) 1997-12-22 1998-12-08 Flasque pour bobine

Country Status (1)

Country Link
EP (1) EP0924153B1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7326402U (de) * 1974-02-07 Winfried Salomon Flanschbuchse mit Außengewinde für Transportrollen
FR1262474A (fr) * 1960-07-16 1961-05-26 Bobine, notamment pour l'industrie textile
DE4236184C1 (de) * 1992-10-27 1993-12-09 Dieter Wandelt Scheibenspule mit Tragzapfen
AU7213094A (en) * 1993-06-24 1995-01-17 International Paper Company Roll package

Also Published As

Publication number Publication date
EP0924153A1 (fr) 1999-06-23

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