EP1623774A1 - Verfahren und Vorrichtung zur Herstellung von Klammern für Klammergeräte, sowie nach diesem Verfahren erhaltene Klammern und Klammerstreifen. - Google Patents

Verfahren und Vorrichtung zur Herstellung von Klammern für Klammergeräte, sowie nach diesem Verfahren erhaltene Klammern und Klammerstreifen. Download PDF

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Publication number
EP1623774A1
EP1623774A1 EP04425596A EP04425596A EP1623774A1 EP 1623774 A1 EP1623774 A1 EP 1623774A1 EP 04425596 A EP04425596 A EP 04425596A EP 04425596 A EP04425596 A EP 04425596A EP 1623774 A1 EP1623774 A1 EP 1623774A1
Authority
EP
European Patent Office
Prior art keywords
stitches
welding
band
wires
staplers
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Withdrawn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
EP04425596A
Other languages
English (en)
French (fr)
Inventor
Luigi Amaldo Paiella
Paolo Alfredo Penati
Roberta Balestra
Roberta Ghioni
Dave Broadhead
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.)
Stanley Italia SRL
Original Assignee
Stanley Italia SRL
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 Stanley Italia SRL filed Critical Stanley Italia SRL
Priority to EP04425596A priority Critical patent/EP1623774A1/de
Publication of EP1623774A1 publication Critical patent/EP1623774A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F45/00—Wire-working in the manufacture of other particular articles
    • B21F45/16—Wire-working in the manufacture of other particular articles of devices for fastening or securing purposes
    • B21F45/24—Wire-working in the manufacture of other particular articles of devices for fastening or securing purposes of staples; of belt-fastening elements

Definitions

  • the invention relates to a new process of manufacturing stitches for staplers in particular, but not exclusively, compressed-air-driven staplers for industrial or professional applications.
  • the industrial production of the stitches considered herein starts from metal wires (the wires may be of various materials including low carbon steel) and depending upon their number the process is referred to as "one-wire", “two-wire” or band process.
  • the band is an intermediate semi-finished product obtained by joining a set of wires using heat-hardening adhesive, the wires being caused to advance through the production plant in parallel, keeping them in a condition of continuity with each other.
  • the number of parallel wires is a few tens (but may be approximately one hundred or more) and they are shaped into a typical "barrel" profile obtained by rolling them in line.
  • the rolling dimensions depend on the type of stitch and may be of the order of 1.5 mm per 0.5 mm.
  • the wires are unwound from corresponding spools and all converge on a comb which arranges them into the adjacent parallel condition; downstream from the comb there is a pair of opposing rollers which squeeze them when they pass there between, imparting the "barrel" shape already mentioned upon them.
  • the wires configured in this way enter into one or more stations wherein adhesive is applied, followed by corresponding driers at the outlet thereof it is obtained an intermediate band 20-30 cm wide formed of bonded wires; in order to obtain the final packaging of the stitches into bars for staplers the band is cut and folded with a press, as if it were a normal sheet.
  • the adhesive brings about both intrinsic risks associated with its flammability or toxicity and difficulties in carrying out the manufacturing cycle. Indeed the adhesive application and drying stations occupy at least 4-5 metres, with the consequence that the resulting apparatus as a whole has appreciable dimensions which therefore require space that is not always available.
  • the technical problem underlying this invention is therefore that of providing a method of manufacturing stitches for staplers which does not require the use of adhesive.
  • the idea for solving this problem consists of combining the filiform members of the intermediate band in a mechanical way, that is using means and/or processes which bring about material joining of the elements.
  • This joining may be brought about through welding or other processing of the material as will be better explained below, and acts in a wholly similar way to the conventional joining with adhesive, in the sense that the stitch bars according to the invention may be used in staplers instead of adhesively bonded bars of stitches.
  • the filiform elements are obtained by cutting a starting metal strip into thin bands longitudinally separated by intact transverse bridges which provide the joint. This alternative is suitable if the stitches are produced starting from a metal band.
  • the production apparatus shown therein is designed to manufacture stitches packed in loading bars 20, starting from a plurality of metal wires 1.
  • the wires are no longer separate from one another but form a semi-finished product consisting of the intermediate band 10 which can subsequently be bent and cut in a known manner with a press 15, thereby obtaining the final bars 20 of metal stitches.
  • a pair of drawing rollers 18 is provided in order to advance band 10 (and wires 1) through the apparatus in Figure 1.
  • the welding which it carries out is preferably of the laser type.
  • it comprises a laser beam emitting head 30 which can move along a guide 32, arranged transversely to the direction of advance of wires 1 entering station 8 (see Figure 2).
  • the latter is produced along a line which is oblique with respect to wires 1 as in Figure 3b when welding head 30 moves only along guide 32, or along a line perpendicular to the wires as in Figure 3a when head 30 also moves in the direction of advance of the wires.
  • the separation between the joining lines 9 will depend on various parameters such as the rigidity of the wires (associated with their dimensions and their material), the length of the stitches for staplers, etc. In the tests performed the spacing between one junction line 9 and the next was approximately 10-15 mm.
  • laser welder 8 has quite small dimensions in comparison with the usual machines for applying and drying adhesive used in the known art: therefore there is more space available for placing press 15 and any other machinery necessary for obtaining final bars 20 in line, downstream of station 8 where the wires are joined together.
  • the manufacturing cycle could be subdivided into two parts - the first in line as above, at the end of which intermediate band 10 is wound in coils in order to be stored separately; the second off-line, in which the coils are transported close to the press for being processed and then obtain final bars 20.
  • transverse welding of the wires (both perpendicular and oblique) carried out as in the example considered above, is more advantageous than longitudinal welding since it requires only one welding head 30 and is therefore quite simple to carry out.
  • transverse welding in Figures 3a, 3b is generally to be preferred, it may nevertheless be replaced by longitudinal laser welding of the wires.
  • This solution (which requires a number of laser beams equal to that of the wires, less one) could be implemented by welding the wires intermittently or joining them over their entire length.
  • Another major variant of the process according to the invention may be obtained by producing bars 20 starting from a band of sheet metal instead of from separate metal wires.
  • a band having a width equal to that of intermediate band 10 already mentioned is made to advance through the apparatus and longitudinal cuts are made therein, in order to form filiform webs therein corresponding to the wires of the preceding embodiment.
  • the longitudinal cuts are made with a predetermined pitch so as to have junction lines equivalent to the transverse welds in Figures 3a, 3b.
  • Longitudinal cutting of the band to form the filiform webs can be carried out in the most appropriate way according to various parameters, such as the width of the band to be cut, the material of the band, its thickness and its speed of advance, etc.
  • Filiform webs 9' may also be cut by mechanical machining, for example by milling and/or rolling of the initial band. In this way it is possible to have situations in which the filiform elements are separated from each other longitudinally and have transverse bridges between them as in the variant of Figure 4, or others in which a pre-cut line is formed between the filiform elements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Package Frames And Binding Bands (AREA)
EP04425596A 2004-08-03 2004-08-03 Verfahren und Vorrichtung zur Herstellung von Klammern für Klammergeräte, sowie nach diesem Verfahren erhaltene Klammern und Klammerstreifen. Withdrawn EP1623774A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04425596A EP1623774A1 (de) 2004-08-03 2004-08-03 Verfahren und Vorrichtung zur Herstellung von Klammern für Klammergeräte, sowie nach diesem Verfahren erhaltene Klammern und Klammerstreifen.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04425596A EP1623774A1 (de) 2004-08-03 2004-08-03 Verfahren und Vorrichtung zur Herstellung von Klammern für Klammergeräte, sowie nach diesem Verfahren erhaltene Klammern und Klammerstreifen.

Publications (1)

Publication Number Publication Date
EP1623774A1 true EP1623774A1 (de) 2006-02-08

Family

ID=34932693

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04425596A Withdrawn EP1623774A1 (de) 2004-08-03 2004-08-03 Verfahren und Vorrichtung zur Herstellung von Klammern für Klammergeräte, sowie nach diesem Verfahren erhaltene Klammern und Klammerstreifen.

Country Status (1)

Country Link
EP (1) EP1623774A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011018064A1 (de) * 2009-08-13 2011-02-17 Karl-Hermann Stahl Verfahren zur vereinzelung von drähten oder bändern aus drahtader- bzw. bandaderbändern sowie vorrichtung zur durchführung des verfahrens
US9511413B2 (en) 2007-05-04 2016-12-06 Cent & Cent Gmbh & Co. Kg Method of making strip formed by web-connected wires
US9630226B2 (en) 2008-07-23 2017-04-25 Cent & Cent Gmbh & Co. Kg Method for producing steel fibers

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE651843C (de) * 1933-06-09 1937-10-20 Karl A Kammer Verfahren zur Herstellung von zusammenhaengenden Streifen aus U-foermigen Heftklammern und aehnlichen Gegenstaenden aus Draht
DE944305C (de) * 1951-12-01 1956-06-14 Heinrich Mezger Verfahren zur Herstellung von Klammerstreifen aus Draht oder Bandeisen, deren Klammern zugeschaerfte und leicht abgebogene Schenkelenden haben
US4066165A (en) * 1976-06-10 1978-01-03 Henry Ruskin Staples and production methods
JPS5496466A (en) * 1978-01-14 1979-07-30 Mitsubishi Heavy Ind Ltd Manufacture of pin group rows for pin fin tube of heat- exchanger or the like
US5303539A (en) * 1993-01-29 1994-04-19 The Gillette Company Staple forming
US5380250A (en) * 1993-03-01 1995-01-10 Dion; Jean-Paul Frangible joints for frangible band of wires or strip of fasteners

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE651843C (de) * 1933-06-09 1937-10-20 Karl A Kammer Verfahren zur Herstellung von zusammenhaengenden Streifen aus U-foermigen Heftklammern und aehnlichen Gegenstaenden aus Draht
DE944305C (de) * 1951-12-01 1956-06-14 Heinrich Mezger Verfahren zur Herstellung von Klammerstreifen aus Draht oder Bandeisen, deren Klammern zugeschaerfte und leicht abgebogene Schenkelenden haben
US4066165A (en) * 1976-06-10 1978-01-03 Henry Ruskin Staples and production methods
JPS5496466A (en) * 1978-01-14 1979-07-30 Mitsubishi Heavy Ind Ltd Manufacture of pin group rows for pin fin tube of heat- exchanger or the like
US5303539A (en) * 1993-01-29 1994-04-19 The Gillette Company Staple forming
US5380250A (en) * 1993-03-01 1995-01-10 Dion; Jean-Paul Frangible joints for frangible band of wires or strip of fasteners

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 003, no. 118 (C - 060) 4 October 1979 (1979-10-04) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9511413B2 (en) 2007-05-04 2016-12-06 Cent & Cent Gmbh & Co. Kg Method of making strip formed by web-connected wires
US9630226B2 (en) 2008-07-23 2017-04-25 Cent & Cent Gmbh & Co. Kg Method for producing steel fibers
WO2011018064A1 (de) * 2009-08-13 2011-02-17 Karl-Hermann Stahl Verfahren zur vereinzelung von drähten oder bändern aus drahtader- bzw. bandaderbändern sowie vorrichtung zur durchführung des verfahrens

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