EP0956257A4 - Bobine de plastique unitaire et a grande capacite de chargement - Google Patents

Bobine de plastique unitaire et a grande capacite de chargement

Info

Publication number
EP0956257A4
EP0956257A4 EP97944411A EP97944411A EP0956257A4 EP 0956257 A4 EP0956257 A4 EP 0956257A4 EP 97944411 A EP97944411 A EP 97944411A EP 97944411 A EP97944411 A EP 97944411A EP 0956257 A4 EP0956257 A4 EP 0956257A4
Authority
EP
European Patent Office
Prior art keywords
mold
reel
unitary
load capacity
holes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP97944411A
Other languages
German (de)
English (en)
Other versions
EP0956257A1 (fr
Inventor
Valentine L Picton
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.)
ENVIROREEL PLASTICS LLC
Original Assignee
ENVIROREEL PLASTICS LLC
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 ENVIROREEL PLASTICS LLC filed Critical ENVIROREEL PLASTICS LLC
Publication of EP0956257A1 publication Critical patent/EP0956257A1/fr
Publication of EP0956257A4 publication Critical patent/EP0956257A4/fr
Withdrawn legal-status Critical Current

Links

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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2628—Moulds with mould parts forming holes in or through the moulded article, e.g. for bearing cages
    • 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
    • B65H75/04—Kinds or types
    • B65H75/08—Kinds or types of circular or polygonal cross-section
    • B65H75/14—Kinds or types of circular or polygonal cross-section with two end flanges
    • 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
    • B65H75/50—Methods of making reels, bobbins, cop tubes, or the like by working an unspecified material, or several materials
    • 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
    • B29L2031/704—Bobbins, spools
    • 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

Definitions

  • the present invention relates generally to high load capacity plastic reels and more specifically, to a high load capacity plastic reel of unitary design and a method for manufacturing the same.
  • the prior art high capacity cable reels of modular design have several drawbacks.
  • First of all, most of the prior art modular designs requires intricate assembly and a multitude of operations to construct.
  • One such design for instance, requires injection molding of two side flanges with the center drum being extruded and cut. Then, after molding, the flange portions of the reel must be attached to the drum portion, usually by ultrasonic welding and/or by means of steel bolts. Often, the nuts and bolts become loosened which can result in unbalanced reels. Thus, a balancing of these reels, and/or the tightening of the bolts is necessary to ensure proper cable/wire winding operations, especially when winding at speeds of up to 7,000 feet/minute.
  • reels may be made of two inj ection molded parts, each comprising of a flange portion and a one-half drum portion, with the two parts being bolted together with steel bolts and plastic interlocks.
  • the interlocks are found between the two l A drum portions to prevent separate spinning of one Yi drum portion from the other. This separate rotating at and between the ⁇ drum portions interfere with the winding process.
  • the plastic interlocks themselves often break and separate rotation of the two parts occurs. Unfortunately, it is difficult to detect when the interlocks are broken since they are in the inside of the reel and not easily visible.
  • the broken plastic reels are usually scrapped and end up in a landfill.
  • Prior art modular reels comprised of steel for the limited use of winding wire, e.g., copper or aluminum, that is hot from the wire extrusion process at typical temperatures of 150° F.
  • the steel reels are typically heavy, at least 120 lbs. or more, are easily deformable, and, when out of balance, cause a lot of vibration during winding operations. They require constant balancing. Even if the bending is almost imperceptible, it may still cause dislocations in the production process resulting in the unwinding of wires in an inconsistent manner and even wire breakage. This will cause the production line to shut down and the scrapping of some materials. Additionally, steel reels are rarely used for shipping since they are too heavy and costly.
  • plastic reels of unitary design are extremely small and lightweight, and are for carrying lightweight thread or small amounts of coated wire, i.e., they do not have the capacity (in terms of both size and weight bearing capacity) to carry heavy wire and cable.
  • These plastic reels are typically manufactured by extrusion processes, and may
  • the instant invention is a plastic reel of unitary design having first and second flange portions and a drum portion formed linearly therebetween.
  • the unitary reel is of size and shape for handling intermediate and high-capacity loads and includes a central shaft hole extending linearly along a central axis of the reel and, additionally, is provided with a plurality of air holes extending partially within the drum portion parallel to the central shaft hole for - 4 - decreasing the weight of the reel.
  • the strength of the unitary reel is not compromised, however, and the lightweight unitary reels are of high-load capacity ranging from 50 lbs. up to 2000 lbs. depending upon the diameter of the drum and flange portions. This is due to the fact that in such a unitary design, stress points commonly found in multi piece reels, are virtually eliminated.
  • a closed system approach is implemented.
  • a four piece mold is provided to form a complete reel forming cavity with one piece of the mold including an opening or gate to allow molten plastic to flow from an extrusion device within the mold cavity.
  • the central shaft opening and plurality of weight decreasing pockets are formed during the molding process, with the central shaft opening requiring a short secondary machining operation to complete the hole. The process for forming the unitary, high load capacity reel is thus quick and efficient.
  • Figure 1 is a perspective view of the unitary, high-load capacity reel of the invention.
  • Figure 2(a) illustrates the top mold portion for the reel mold and Figure 2(b) is a cross- sectional view of the top mold portion taken along line AA in Figure 2(a).
  • Figure 3(a) illustrates the bottom mold portion for the reel mold and Figure 3(b) is a complicat endeavour balance, « . O 99/15454
  • Figure 4(a) illustrates the central side mold portions for the reel mold and Figure 4(b) is a cross-sectional view of the central side mold portions taken along line CC in Figure 4(a).
  • Figure 5 is the cross-sectional view of the completed mold prior to filling.
  • Figure 6 illustrates a completely filled reel cavity.
  • Figure 7 is the cross-sectional view of the completed unitary reel.
  • Figure 1 illustrates a perspective view of the high-load capacity reel 50 (hereinafter "reel") of unitary design.
  • a high-load capacity reel includes reels capable of accommodating intermediate loads, e.g., in the range from about 50 lbs. to 1000 lbs., however, greater loads can be accommodated.
  • the reel 50 includes two flange portions 55a and 55b and central drum portion 60 and is dimensioned to carry and dispense heavy loads of cables, wires or like materials. Diameters of each of the flange portions 55a,b may range from 16" to 32" or greater, and the diameter of drum portion 60 ranges between 12" to 22" or greater, according to the particular application and customer needs. Accordingly, the weight and load bearing capacity of the unitary reel will vary. For the 16" diameter reel weighing approximately 30 lbs., it is estimated that load capacities range between 50-100 lbs. For the 22" diameter reel weighing approximately 50 lbs. , it is estimated that load capacities range between 100-500 lbs.
  • each flange portion 55a,b will also vary in accordance with the customers requirements, and can range anywhere between one and several inches thick. Accordingly, the above reel weights and load range estimates will vary with the flange thicknesses.
  • the reel includes a first central shaft hole portion 75 extending centrally through each of the flange portions 55a,b and drum portion 60 for accommodating placement of the reel on a mandrel or winding shaft of a cable/wire dispensing or winding machine to aid in the winding and/or dispensing of the cable or wire materials.
  • central shaft hole portion 75 are a plurality of hollow pockets or holes 80 that are also formed during the molding process and extend from each of the flange portions 55a,b to within the drum portion 60 of the reel parallel to the central shaft hole. These holes 80 are provided for
  • Fig. 1 eight (8) holes are provided, however, more or less can be provided depending upon the desired load bearing capacity.
  • the diameters of the holes may vary depending upon the desired load capacity and need of the customer. According to the principles of the invention, these holes are provided during the formation of the unitary reel, and not as a subsequent machining operation.
  • one or more drive holes 90 can additionally be machined or molded to enable attachment to a customer's winding/dispensing machine for reel rotation during the cable/wire winding or dispensing operation.
  • additional starter cable holes may be molded or machined at the edge of the drum where it meets the flange for attaching wire/cables in the winding process.
  • the process for manufacturing the unitary, high-load capacity reel of the invention requires the introduction of molten plastic into a mold 100 described hereinbelow with respect to Figs. 2(a) - 6.
  • Molten plastic is provided by an extrusion device (not shown).
  • the types of molten plastics used for forming the unitary reel include any of the conventional commodity thermoplastic resins and engineering resins, including polyethylene, polypropylene, polystyrenic resins, polyester resins, PVC's, polycarbonates, etc., with or without color concentrate additives for color, foaming agents for lightening, and other additives for increasing flexibility, longevity, rigidity, and/or strength.
  • the formed unitary plastic reel are used, the formed unitary plastic reel
  • inventive reel can be used for hot-wire winding operations.
  • inventive reel may be made out of reprocessed and/or recycled (post industrial and/or post consumer) resins.
  • the output of the extrusion device (not shown) is introduced through a gate 110 provided within the body, e.g., top mold portion 210, of the mold 100 for pouring
  • the mold 100 is a four piece mold having a top mold portion 210, a bottom mold portion 220, a first central portion 230, and a second central portion 240 forming a mold cavity 150 when connected together by suitable means such as pins
  • the diameter of the opening 110 is such to accommodate a tight-fit with the extrusion device 135 so that the molten plastic throughput from the extrusion device is great enough to fill the mold cavity 150, which is a closed system, in a minimum amount of time. It should be understood that the size of the extrusion device providing the molten plastic and the specifications thereof, will depend in large part upon the size and weight of the unitary reel.
  • Figure 2(a) illustrates a view taken underneath of the top mold portion 210 and Fig.
  • top mold portion 210 is dimensioned as a square slab of aluminum or steel, approximately 1"
  • top mold portion additionally contains a circular lip or flanged portion 212 for outlining one flange portion, e.g., flange 55b, of the formed unitary reel 90 ( Figure 1).
  • the circumferential lip portion may be formed integrally with the underside of the top mold portion or, may be a separate piece bolted thereto, and, preferably, is of a height approximately equal to the desired thickness of the flange portion of the reel, e.g., 2" inches.
  • top mold portion may be formed integrally with the underside of the top mold portion or, may be a separate piece bolted thereto, and, preferably, is of a height approximately equal to the desired thickness of the flange portion of the reel, e.g., 2" inches.
  • top mold portion 210 in Figure 2(a), there is additionally provided several bolt receiving openings 208 for receiving bolts that attach steel pins 218a, 218b (as shown in Fig. 2(b)) to the underside of the top mold portion within the circular lip region that protrude down within the cavity of the mold.
  • steel pins 218a, 218b as shown in Fig. 2(b)
  • a plurality of bolt receiving holes, e.g., 204a,..,d are provided for securely attaching the top mold portion with the first and second central mold portions.
  • Figure 3(a) illustrates a top view of bottom mold portion 210 and Fig. 3(b) is a cross- sectional view of the bottom mold portion 220 taken along line BB of Fig. 3(a). As shown in
  • a single bolt receiving opening 225 is provided centrally within the circular lip region of the bottom mold for securely attaching a larger solid steel or aluminum pin member 229 that protrudes within the drum portion of the mold proximate the top mold portion.
  • This large solid pin member 229 functions to form the majority of the central shaft bore 75 of the resultant reel.
  • a plurality of bolt receiving holes e.g., 224a,..,d are provided for securely attaching the bottom mold portion with the first and second central mold portions.
  • the provision of four bolt receiving holes 204a,..,d in the top mold portion and holes 224a,..,d in the bottom mold portion are for illustrative purposes and, according to design considerations, the amount of the bolts required to secure the top and bottom mold portions to the central side portions can be fewer or greater in number. It should be understood that other additional means
  • clamping or pressure may be used to secure the mold portions together.
  • FIG 4(a) illustrates a top view of the central mold portions 230 and 240 shown connected together as part of mold 100.
  • each central mold portion 230,240 provides a half a cylindrical opening 231,241, respectively, such that when connected, form the drum portion of the unitary reel.
  • Figure 4(b) illustrates a cross-sectional view of the two central mold pieces taken along line CC of Figure 4(a).
  • the first central mold portion contains at least one bolt receiving hole 207a for receiving the bolts 99a for connecting the top mold portion 210 and, likewise contains bolt receiving hole (not shown) for connecting the bottom mold portion 220. It should be understood that other types of clamping, bolting, or pressure mechanisms may be used.
  • the second central mold portion 240 is provided with bolt receiving hole 207b for receiving the bolts 99b for connecting the top mold portion 210 and, likewise contains bolt receiving hole (not shown) for connecting
  • the bottom mold portion 220 As known to skilled artisans, molded plastic will shrink upon cooling, so the dimensions of the mold portions 210,220,230 and 240 may be slightly expanded to ensure proper dimensions of the formed reel. For instance, the circumferential lip of the top mold for forming the 16" diameter flange portion may be 17" inches in diameter, by way of illustration.
  • Figure 5 illustrates the preferred embodiment of the fully assembled unitary reel mold 100 showing the upper set of pins 218a,b attached to the top mold portion 210 depending downwards within the mold cavity 150, the bottom set of pins 228a,b attached to the bottom mold portion 220 protruding upward to within the mold cavity 150, and the large solid central
  • the pin member 229 attached to the bottom mold portion 220 protruding upward in axial alignment with the top opening 110 of the top mold portion 210 of the reel mold, and preferably, to the extent that the top surface 221 of the pin 229 is disposed directly below the opening 110.
  • the distance between the top surface of the pin and the mold opening is between 3/8" and 5/8" inches however, this may vary.
  • the central pin 229 enables the formation of the central shaft opening for the reel.
  • the central pin also provides a diverting function for distributing molten
  • the central pin 229 is tapered in design having a flat top surface diameter slightly less, e.g., between 1/8" inch - 3/8" inches less, than the diameter of the gate 110 under which it is disposed, and a larger bottom pin diameter ranging between 3" - 5".
  • the central pin 229 is tapered in design having a flat top surface diameter slightly less, e.g., between 1/8" inch - 3/8" inches less, than the diameter of the gate 110 under which it is disposed, and a larger bottom pin diameter ranging between 3" - 5".
  • plastic flow from the extrusion device through the gate and around the central pin enabling complete and even fill to within all portions of the mold, and additionally, aiding in the removal
  • Each pin of the upper and lower sets of air-pocket forming pins range approximately from 6" to 12" (inches) in length and 2" to 6" (inches) in diameter, but
  • the molten plastic is output from the extrusion device at a pressure of approximately 5000 lbs/sq. inches (in 2 ) such that the entire mold is filled in a short period of time, i.e, between 2 - 5 minutes, depending upon the size of the reel.
  • the force alone of the extrusion device rotating screw (not shown) enables the molten plastic to fill the mold.
  • the extrusion device automatically shuts itself off after a certain predetermined number of screw revolutions depending upon 1) the size of the reel to be formed, 2) the gate, and 3) the pressure of the molten plastic output of the extrusion device.
  • a lower pressure e.g., approximately 4000 lbs/sq. inches
  • me means of filling of the mold may vary as well and may include injection of the molten material by an injection device as in or similar to injection molding or structural foam molding.
  • Figure 6 illustrates the mold 100 having a completely filled mold cavity 150.
  • a small fill conduit or tunnel 80 is provided in the mold so that an operator can manually check the fill with a probe to make sure that each part is
  • the mold 100 is immediately placed and completely submerged in a cooling bath of, e.g., water, as a cooling bath is an efficient way of cooling down such a large part.
  • a cooling bath of, e.g., water
  • the temperature of the cooling bath is about 40° F but the cooling bath is not limited to this temperature and may vary..
  • both internal and external cooling of the unitary reel may be provided, e.g. , by means such as liquid cooling jackets formed around the mold pieces and having liquid coolant circulation conduits within each of the pins to facilitate cooling and decrease cooling time, or, by means of jet spray of cold water against the mold.
  • the top, bottom and then side portions of the mold 100 are unbolted and the formed reel is removed for final cooling and shrinkage.
  • the opening and closing of the molds may be simplified and/or more automated by constructing automatic "debolters" as an external device, or by holding the mold parts together by a clamp, or by pressure in an injection molding or similar machine.
  • the formed reel is machined to complete the central shaft hole, and, further for smoothness, e.g., to complete and round out tops of holes, etc.
  • Figure 7 illustrates a cross-sectional view of the formed unitary reel of the invention when removed from the mold 100.
  • the small air pockets or holes 80 do not have to be machined and, as mentioned above, increasing pin size will decrease the weight of the reel without necessarily compromising strength depending upon the capacity needs.
  • the central shaft hole is not completely hollowed and a small portion 85 of the reel has to be machined in a secondary operation to complete the central shaft hole 75.
  • the central shaft hole is tapered and it is desirable that the secondary machining operation forms the central shaft hole 75 in accordance with the shaft dimensions or mandrel of the winding
  • shaft hole 75 is dimensioned to enable cable/wire winding in most

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)

Abstract

Cette invention concerne une bobine de plastique (50) unitaire, à grande capacité de chargement et d'un faible poids. Cette bobine comprend les éléments suivants: une première (55a) et une seconde (55b) parties latérales comportant des flancs et globalement circulaires; une partie tambour (60) formée entre les parties latérales comportant des flancs; un trou d'arbre central (75) linéaire qui suit l'axe central de la bobine entre les deux parties comportant des flancs; et enfin, plusieurs trous (80) qui partent de chaque partie comportant des flancs, qui s'étendent partiellement jusque dans la partie tambour et qui sont parallèles au trou d'arbre central. Ces trous contribuent à l'obtention d'une structure de faible poids. Cette invention concerne également un moule (100) permettant de former une bobine unitaire, lequel comprend une ouverture d'entrée (110) permettant à un dispositif d'extrusion de matières plastiques de le remplir. Une goupille de moulage (229) centrale et conique est disposée dans le moule et possède une surface supérieure proche de l'ouverture d'entrée, ceci de manière à faciliter la répartition uniforme des matières plastiques provenant du dispositif d'extrusion dans toutes les parties dudit moule.
EP97944411A 1997-09-25 1997-09-25 Bobine de plastique unitaire et a grande capacite de chargement Withdrawn EP0956257A4 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1997/017087 WO1999015454A1 (fr) 1997-09-25 1997-09-25 Bobine de plastique unitaire et a grande capacite de chargement

Publications (2)

Publication Number Publication Date
EP0956257A1 EP0956257A1 (fr) 1999-11-17
EP0956257A4 true EP0956257A4 (fr) 2000-12-13

Family

ID=22261726

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97944411A Withdrawn EP0956257A4 (fr) 1997-09-25 1997-09-25 Bobine de plastique unitaire et a grande capacite de chargement

Country Status (6)

Country Link
EP (1) EP0956257A4 (fr)
JP (1) JP2001504791A (fr)
AU (1) AU4591597A (fr)
CA (1) CA2272358A1 (fr)
IL (1) IL129894A0 (fr)
WO (1) WO1999015454A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103480847A (zh) * 2013-07-11 2014-01-01 上海三展新材料科技有限公司 一种金属注射成形工艺中的棘轮产品浇口结构和专用装置
US10763649B2 (en) * 2014-06-13 2020-09-01 Greenlee Tools, Inc. Cable feeder
US11872838B2 (en) 2022-03-18 2024-01-16 Stanley Black & Decker, Inc. Jam resistant chalk reel

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2829400A (en) * 1954-09-15 1958-04-08 Coats & Clark Method for producing foamed plastic spools
US2890487A (en) * 1956-04-03 1959-06-16 Coats & Clark Spool casting die and core structure
US2990133A (en) * 1958-06-18 1961-06-27 American Pulley Co One piece molded spool
DE2043593A1 (de) * 1970-09-03 1972-03-09 Heidsiek A Kabeltrommel
CH597083A5 (en) * 1975-10-16 1978-03-31 Gruber M Kunststoffwerk Katzba Cable drum of partly foamed plastics
GB2240089A (en) * 1989-12-20 1991-07-24 N Proizv Ob V N Isseldovatelsk Plastics reel
US5383626A (en) * 1991-11-12 1995-01-24 Hafner & Krullmann Gmbh Take-up reel for rollable winding material

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Publication number Priority date Publication date Assignee Title
US4106718A (en) * 1970-10-30 1978-08-15 The Garcia Corporation Spinning reel spool and adapter therefor
US3995008A (en) * 1975-02-20 1976-11-30 Gould Inc. Molded plastic battery container
US3987975A (en) * 1975-04-10 1976-10-26 Lawrence Peska Associates, Inc. Magnetic tape reel with stop means
JPS5432494Y2 (fr) * 1977-02-18 1979-10-09
US4208368A (en) * 1978-07-18 1980-06-17 Gebruder Buhler Ag Method and apparatus for injection molding foamed plastic articles using a pre-pressurized mold having fixed core members with controlled venting
JPS5677958A (en) * 1979-11-29 1981-06-26 Tdk Corp Tape cover and its production
JPS62119730A (ja) * 1985-11-19 1987-06-01 Fuji Photo Film Co Ltd 磁気デイスクの製造方法
US4989802A (en) * 1987-11-06 1991-02-05 Fuji Photo Film Co., Ltd. Core for web material
JPH0777070B2 (ja) * 1988-02-23 1995-08-16 富士写真フイルム株式会社 磁気テープ巻取方法
US5683059A (en) * 1995-04-24 1997-11-04 Toyo Boseki Kabushiki Kaisha Bobbin for superconducting coils

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2829400A (en) * 1954-09-15 1958-04-08 Coats & Clark Method for producing foamed plastic spools
US2890487A (en) * 1956-04-03 1959-06-16 Coats & Clark Spool casting die and core structure
US2990133A (en) * 1958-06-18 1961-06-27 American Pulley Co One piece molded spool
DE2043593A1 (de) * 1970-09-03 1972-03-09 Heidsiek A Kabeltrommel
CH597083A5 (en) * 1975-10-16 1978-03-31 Gruber M Kunststoffwerk Katzba Cable drum of partly foamed plastics
GB2240089A (en) * 1989-12-20 1991-07-24 N Proizv Ob V N Isseldovatelsk Plastics reel
US5383626A (en) * 1991-11-12 1995-01-24 Hafner & Krullmann Gmbh Take-up reel for rollable winding material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9915454A1 *

Also Published As

Publication number Publication date
IL129894A0 (en) 2000-02-29
WO1999015454A1 (fr) 1999-04-01
AU4591597A (en) 1999-04-12
CA2272358A1 (fr) 1999-04-01
EP0956257A1 (fr) 1999-11-17
JP2001504791A (ja) 2001-04-10

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