EP0073605A1 - Nähfadenspule - Google Patents

Nähfadenspule Download PDF

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Publication number
EP0073605A1
EP0073605A1 EP82304354A EP82304354A EP0073605A1 EP 0073605 A1 EP0073605 A1 EP 0073605A1 EP 82304354 A EP82304354 A EP 82304354A EP 82304354 A EP82304354 A EP 82304354A EP 0073605 A1 EP0073605 A1 EP 0073605A1
Authority
EP
European Patent Office
Prior art keywords
spool
sleeve
inner sleeve
tubular portion
thread
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Withdrawn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
EP82304354A
Other languages
English (en)
French (fr)
Inventor
Helmut Heldmann
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.)
Gutermann and Co AG
Guetermann and Co AG
Original Assignee
Gutermann and Co AG
Guetermann and Co 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 Gutermann and Co AG, Guetermann and Co AG filed Critical Gutermann and Co AG
Publication of EP0073605A1 publication Critical patent/EP0073605A1/de
Withdrawn legal-status Critical Current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
    • B65H75/04—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
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments
    • 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

Definitions

  • This invention relates to spools for sewing thread which may, for example, be constructed from both plastics material and paper.
  • thread holding means means for holding the free end of the thread
  • a spool from two different types of plastics material.
  • a relatively rigid or brittle material may be used for the manufacture of flanged end pieces which are inserted, like plugs, into a cylindrical sleeve or core which is made of relatively soft or pliable material.
  • the use of two different types of plastics material helps to avoid problems of (a) injection moulding, and (b) breakage of the spool.
  • the rigid material is more suitable for precision moulding of small complex shapes, especially those which are normally required in the manufacture of thread holding means.
  • the soft material is better than the rigid material for making the cylindrical core, because it yields under stress and is therefore less likely to break during the process of winding thread on the spool.
  • the thread With high speed winding machines, the thread is subjected to a high tension and high stresses are applied to the spool, particularly at the junction between the flanged end piece and the cylindrical core.
  • a core made of soft plastics material absorbs this stress and thereby resists such breakage.
  • a cylindrical core made of the soft material also expands in order to grip the flanged end pieces when they are inserted into the respective ends of the core.
  • the soft plastics material is much more expensive than the rigid material and hence this would become more of a problem with the rising cost of plastics. At least one aspect of the present invention provides a solution to this problem.
  • the flanged end pieces may have an aperture which isjust large enough to accept the spool pin, the internal diameter of a single paper core may be much larger and hence there would be too much freedom or clearance between the pin and the core.
  • the spool is longer than the pin and hence the pin passes through only the lower flanged end piece. This excessive clearance can lead to "wobbling" of the spool when the thread is rapidly unwound by the machine.
  • another problem faced by the invention is to avoid this excessive clearance whilst not increasing the cost of manufacture of the spool.
  • a spool for sewing thread comprises first and second end pieces made of plastics material and inner and outer sleeves made of paper material, each end piece having a flange portion and a tubular portion, the flange portion having an aperture which is coaxial with the tubular portion, the aperture being defined by a rim which extends radially inwardly of the tubular portion to provide an end stop for the inner sleeve when inserted into the tubular portion, the tubular portion being dimensioned for insertion into the respective end of the outer sleeve.
  • the ends of the inner sleeve are received by recesses in the respective tubular portions, and the tubular portions are plugged into the respective ends of the outer sleeve.
  • the inner sleeve serves to take up the excessive clearance which may otherwise be present with a single or outer sleeve made of paper material.
  • the internal diameter of the inner sleeve is suitably selected with regard to the external diameter of the spool pin of a sewing machine, which is generally standard, so as to prevent any "wobbling" or excessive play of the spool during sewing.
  • the external diameter of the outer sleeve is suitably selected so that the outer diameter of the thread windings is generally similar to the outer diameter of the flange portions of each end piece.
  • the rim which defines the aperture in the flange portion is preferably dished, i.e. concave towards the end of the inner sleeve, so as to assist in centering the inner sleeve with the aperture in the flange portion when the parts of the spool are assembled.
  • the inner sleeve may be a loose fit in the tubular portion of each end piece, but the outer sleeve is preferably firmly attached to the outer surfaces of the tubular portions, for example, by adhesive.
  • thread holding means have a complex shape, they can be expensive to produce. However, it is important to provide reliable means for holding the free end of the thread. This poses another problem, especially in the case of using a cylindrical core made of paper.
  • a further aspect of the invention provides a solution to this problem, especially to avoid the use of complex moulds or tools which are normally used in the production of flanged end pieces having thread holding means.
  • a spool for sewing thread comprises first and second end pieces which are spaced by a sleeve, the end pieces each including a flange portion and a tubular portion, the tubular portion being inserted into the respective end of the sleeve; the spool further including a ring which is positioned on the tubular portion of one of the end pieces and which is located between the associated flange portion and the end of the sleeve.
  • the above arrangement defines thread holding means whereby the free end of the thread is held in a peripheral recess between the ring and the flange portion.
  • the ring-opposing face of the flange portion is inclined so that it defines, together with the ring, a wedge-shaped peripheral recess.
  • the inclined face of the flange portion may include a series of resilient tongues with small protuberances thereon, the tongues being alternately spaced by sectors of the face which also have small protuberances thereon, the protuberances on the tongues being slightly radially displaced from the protuberances on the sectors therebetween.
  • the outer peripheral edge of the ring is preferably castellated, i.e. so as to form a series of outwardly projecting protuberances, to assist in catching the free end of the thread when it is led into the thread holding recess.
  • the two aspects of the invention mentioned above may be used in combination or they may be used separately. They may also be used to modify prior art spools where it is desirable to use paper cores and or the thread holding ring.
  • a sewing thread spool includes end pieces 1 and 5 made of plastics material, an inner sleeve 2 and an outer sleeve 3 both made of paper material, and a thread holding ring 4 made of plastics material.
  • the end pieces 1, 5 are made of plastics material and they may have an identical construction.
  • One advantage of using identical end pieces is that special tooling is not required, in an injection moulding process, to produce a specially shaped end piece having thread holding means.
  • the end piece 5 is preferably provided with resilient tongues (not shown) which carry protuberances (not shown), the tongues being spaced by sectors which also have protuberances, as described in UK Patent No. 1247970.
  • Each end piece 1,5 has a flange portion 6 and a tubular portion 7.
  • the flange portion 6 has an inclined side face 8 (seen in detail in Fig 2) which is part of a conical section 9.
  • the conical section 9 is integral with a circular rim portion 10, which projects radially inwardly and which defines a circular aperture 11 passing through the end piece.
  • the end of each tubular portion 7 is thus partly closed by a rim portion 10.
  • the rim portion 10 thereby acts as an end stop for the inner sleeve 2 when the end pieces 1, 5 are fitted onto the ends of the sleeves 2,3.
  • the aperture 11 in each end piece is coaxial with the longitudinal axes of the sleeves 2, 3 when the spool has been assembled.
  • a side face of the circular rim 10 is inclined to provide an annular conical section which has a centering effect on the end of the inner sleeve 2 when the end pieces 1, 5 are fitted to the sleeves 2, 3.
  • the end of the inner sleeve 2 abuts the circular inclined face of the rim 10 and it is centered by the conical recess.
  • Each end of the outer sleeve 3 is a tight fit on the outer cylindrical surface of the respective tubular portion 7.
  • the ends of the sleeve are secured to the tubular portions by means of.adhesive.
  • the radially innermost end of the ring 4 is engaged by the end 12 of sleeve 3 and by the radially innermost portion of the inclined face 8 of the flange portion 6.
  • the ring 4 and face 8 thereby define a wedge-shaped circular recess in which the thread is held..This is schematically illustrated by showing a cross-section of the thread 13 in the drawing.
  • the circular ring 4 is a loose fit on the cylindrical tubular portion 7 and the internal diameter of the ring is smaller than the external diameter of the inner sleeve 2.
  • the external diameter of the ring is approximately the same as the external diameter of the flange portion 6.
  • the outer peripheral edge of ring 4 is preferably castellated to assist in catching the free end of the thread when it is led into the thread holding recess (i.e. the wedge-shaped recess shown in Fig 2).
  • the internal diameter of the inner sleeve 2 is selected with regard to the external diameter of a spool mounting pin on a sewing machine so as to prevent excessive play during sewing. This is schematically illustrated in Fig 3, which shows a cross-section through the spool when fitted onto a spool pin 14.
  • the external diameter of the outer sleeve 3 is selected with regard to a predetermined length of thread to be wound on the spool, whereby the diameter of the thread windings 17 is approximately the same as the diameter of the flange portions 6, 6' of each end piece. This provides a neat package which is commercially attractive.
  • Fig 4 illustrates a longitudinal section of a spool according to another embodiment.
  • the tubular portions 7, 7' of each end piece 1, 5 are apertured with regard to the diameter of a spool pin on a sewing machine.
  • This is possible where either the spool is of smaller dimensions or where more thread is wound on the spool.
  • the outer diameter of the single sleeve is suitably selected so that the external diameter of the thread windings is approximately the same as the diameter of the flange portions.
  • end pieces 1, 5 and the ring 4 are of relatively simple construction and are independent of one another, this advantageously assists in their manufacture, e.g. by an injection moulding process.

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  • Storage Of Web-Like Or Filamentary Materials (AREA)
EP82304354A 1981-08-26 1982-08-18 Nähfadenspule Withdrawn EP0073605A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8125990 1981-08-26
GB8125990 1981-08-26

Publications (1)

Publication Number Publication Date
EP0073605A1 true EP0073605A1 (de) 1983-03-09

Family

ID=10524166

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82304354A Withdrawn EP0073605A1 (de) 1981-08-26 1982-08-18 Nähfadenspule

Country Status (2)

Country Link
EP (1) EP0073605A1 (de)
BR (1) BR8204966A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3431335A1 (de) * 1984-08-25 1986-03-06 Gütermann & Co. AG, Zürich Spulenkoerper fuer garne, faeden oder dergleichen
EP0192916A1 (de) * 1983-10-17 1986-09-03 Mölnlycke Sytrad Aktiebolag Fadenspule
GB2278339A (en) * 1993-05-25 1994-11-30 Pentre Group Ltd Reels

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE848469C (de) * 1941-03-11 1952-09-04 Mackie & Sons Ltd J Spule
GB1043527A (en) * 1962-08-17 1966-09-21 Mackie & Sons Ltd J Improvements in bobbins
GB1247970A (en) * 1969-05-06 1971-09-29 Gutermann & Co Ag Spool for sewing thread

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE848469C (de) * 1941-03-11 1952-09-04 Mackie & Sons Ltd J Spule
GB1043527A (en) * 1962-08-17 1966-09-21 Mackie & Sons Ltd J Improvements in bobbins
GB1247970A (en) * 1969-05-06 1971-09-29 Gutermann & Co Ag Spool for sewing thread

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0192916A1 (de) * 1983-10-17 1986-09-03 Mölnlycke Sytrad Aktiebolag Fadenspule
DE3431335A1 (de) * 1984-08-25 1986-03-06 Gütermann & Co. AG, Zürich Spulenkoerper fuer garne, faeden oder dergleichen
EP0180300A1 (de) * 1984-08-25 1986-05-07 Gütermann & Co., Aktiengesellschaft Spulen für Garne, Fäden und dergleichen
US4659032A (en) * 1984-08-25 1987-04-21 Guterman & Co. A.G. Spools for yarns, threads or the like
GB2278339A (en) * 1993-05-25 1994-11-30 Pentre Group Ltd Reels

Also Published As

Publication number Publication date
BR8204966A (pt) 1983-08-02

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19830812

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19850423

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HELDMANN, HELMUT