US3641960A - Apparatus for joining sheet metal bands - Google Patents

Apparatus for joining sheet metal bands Download PDF

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Publication number
US3641960A
US3641960A US884801A US3641960DA US3641960A US 3641960 A US3641960 A US 3641960A US 884801 A US884801 A US 884801A US 3641960D A US3641960D A US 3641960DA US 3641960 A US3641960 A US 3641960A
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United States
Prior art keywords
rollers
sheet metal
pair
strip
end portions
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Expired - Lifetime
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US884801A
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English (en)
Inventor
Lennart Reinhold Kalb
Karl Gustav Olsson
Bengt Gordon Theodor Blom
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SECOR AB
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SECOR AB
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/24—Transferring coils to or from winding apparatus or to or from operative position therein; Preventing uncoiling during transfer
    • B21C47/247—Joining wire or band ends
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/34—Means for forming clench-tongue [eg, for tieband]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49915—Overedge assembling of seated part
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49936—Surface interlocking
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5102—Binding or covering and cutting

Definitions

  • ABSTRACT An apparatus for joining separate sheet metal bands to be passed in succession through a band-treating plant by punching interengaging cuts in overlapping end portions of the bands and comprising band-gripping rollers operative to first position the band end portions to be joined in relation to a transverse series of band cutting and deforming tools, to subsequently stretch the joint in order to effect interlocking engagement of the cuts, and to finally subject the joint to a pressure deforming the edges of the engaged cuts.
  • Such joining of successive lengths of sheet metal band may be accomplished by spot welding or, sometimes, seam welding.
  • spot welding or, sometimes, seam welding.
  • relatively simple welding operations cannot be successfully used unless the overlapping metal surfaces are tolerably clean, i.e., free from scales, grease and other impurities which may considerably increase the electrical contact resistance and hence impair the welding bond.
  • Sheet metal bands coming more or less directly from the rolling mill rarely meet this requirement, and cleaning the band ends to be joined is usually an undesirable complication.
  • the bent tabs or hooks will locally double the thickness of the joint which in turn is already twice as thick as each single band, and the projections formed by the hooks will have sharp edges to that they can easily damage certain elements of the treating plant, such as conducting rollers, surface treating tools and the like.
  • the locking tabs or hooks are difficult to produce, especially when the thickness of the sheet metal bands exceeds about two-hundredths of an inch or about 0.5 millimeter, and they cannot at all be used when the sheet metal is brittle, because the hooks then easily break and fall away when being formed.
  • This invention is based on the conception that there is another way of interlocking overlapping sheet metal bands which, although not previously tried for joining broad bands to be successively treated in a continuously operating plant, could probably be used for such purpose and, if so, would be much superior to the methods now in use.
  • This other way of locking together sheet metal band ends has been successfully used for many years in the packing industry for closing hoops or wrapping bands of sheet metal around various kinds of transport units, and also in this case overlapping band end portions, though representing the opposite end portions of a single band length, are joined by being punched. It has been established by practical tests that this idea was basically right but also that special measures were required in order to adapt the known method to the new application. In addition, it was established that new and improved means were required to successfully accomplish the necessary steps of joining or interlocking the successive, broad sheet metal bands, because the conditions are in this case quite different from those prevailing when hoops of sheet metal strips are closed.
  • this invention is concerned with an apparatus for joining overlapping end portions of separate and successive, relatively broad sheet metal bands by locally cutting through and deforming the lap joint section between them in a manner to provide a transverse series of interengaging and interlocking groups of longitudinally extending, S- or Z-like cuts, the edges of which are displaced in the direction of thickness of the joint section so as to interengage, when a pull is exerted in the longitudinal or running direction of the sheet metal bands.
  • Another object of the invention is to provide an apparatus of the kind referred to which is capable of joining together the rear end portion of a preceding sheet metal band and the foremost end portion of a succeeding sheet metal band in a mutually overlapping position in such a manner that the total thickness of the joint will not considerably exceed the sum of the two band thicknesses, thereby avoiding such excessively protruding local projections in the joint which are liable to cause troubles during the subsequent continuous treatment of the jointed bands.
  • a still further object of the invention is to provide an apparatus of the kind referred to hereinbefore, which is reliable in use, relatively simple and robust in construction and capable of carrying out the necessary operations in a rational manner and within a relatively short time interval, so that undesirably long interruptions in the band feed through the apparatus can be avoided.
  • FIG. I is a sectional elevation of a band-joining apparatus according to the invention, the section being taken in the direction of running of the sheet metal bands to be joined and substantially along the line I-I in FIG. 2,
  • FIG. 2 is a front elevation of the apparatus as seen from the left in FIG. 1, i.e., from that side where the sheet metal bands are fed into the same,
  • FIG. 3 is a sectional elevation taken along the line III-III in FIG. I, certain details being removed for clarity,
  • FIG. 4 is a partial sectional elevation showing the main parts of the apparatus as in FIG. 1 but on an enlarged scale
  • FIGS. 5 to 10, inclusive illustrate in a very simplified and diagrammatic manner the various operating steps of the apparatus shown in FIGS. 1 to 4,
  • FIG. II shows in plan view a joint between two sheet metal band end portions, which has been produced by an apparatus of the kind here described,
  • FIG. 12 is a partial longitudinal section through a lap joint section whichhas just been punched, the section being taken along the line XIIXII in FIG. 13,
  • FIG. 13 is a partial plan view of a pair of cuts punched in a lap joint section as a first step in joining the two sheet metal layers thereof together,
  • FIG. 14 is a partial longitudinal section taken along the line XIV-XIV in FIG. 15 and illustrating the next step in interlocking the two punched sheet metal layers,
  • FIG. 15 is a partial plan view resembling that of FIG. 13 but showing the sheet metal layers of the lap joint section longitudinally displaced in a manner to effect their interengagement, and
  • FIG. 16 is a partial section similar to that of FIG. 14 but illustrating the joint in a rolled or compressed and completed stage, as it will leave an apparatus embodying the present invention.
  • FIGS. 11 and 12-15 In all figures numeral 1 has been used to designate the rear end portion of a preceding sheet metal band, while numeral 2 has been used to designate the foremost end portion of a succeeding sheet metal band.
  • the two bands ordinarily have a uniform width of between I and 7 feet (0.3-2.l meters) and a uniform thickness between one-hundredth and two-tenths of an inch (025-5 .1 millimeters).
  • the sheet metal bands are supposed to be manufactured by rolling, which means that they possess at least a certain ductility.
  • both the overlapping band end portions are subjected to a cutting and material-deforming punching operation at which a plurality of through cuts 4 and 5 are produced in them as shown in FIG. 13.
  • the opposite edges of each out are slightly displaced in the direction of thickness of the joint as shown in FIG. 12.
  • the cuts are arranged in a single row or series extending in the crosswise direction over the two bands 1 and 2 and. in most cases it is preferred to punch the cuts 4 and 5 in closely adjacent, cooperating pairs as shown, so as to form between each pair a relatively narrow and, hence, easily deformable strip portion 6.
  • Each cut generally extends in the longitudinal direction of the two sheet metal bands and comprises two mutually parallel but laterally displaced end portions interconnected by an intermediate portion forming an angle with the end portions.
  • the two cuts 4 and 5 in each pair are mirror pictures of each other as shown.
  • each cut may be varied within certain limits without losing their ability to form a reliable lck" between the overlapping joint layers 1 and 2.
  • some or all of the pairs of cuts may be inverted as compared with what is shown in FIG. 11, provided that the strip portions 6 between each such pair of cuts is then pressed out in the opposite direction.
  • each cut may also have a straight intermediate portion merging into both the parallel end portions at any desired angle.
  • the apparatus embodying the present invention is intended to join the ends of succeeding sheet metal bands in the manner hereinbefore described.
  • the preferred form of such an apparatus includes a supporting structure which has been generally designated by numeral 10 and which takes the form of a vertical framework comprising two spaced end columns 11, an upper crossbeam l2 and a lower, transverse foot structure 13.
  • a winglike end wall 14 To the inner side of each column 11 there is secured a winglike end wall 14 and these two end walls are at their respective ends interconnected by shelves 15.
  • first pair of guiding rollers 16 As seen in the direction of feed of the sheet metal bands I and 2 through the apparatus, there are between the end walls 14 mounted a first pair of guiding rollers 16, a first pair of feeding rollers 17, a second pair of feeding rollers 18 and a second pair of guiding rollers 19.
  • Each such pair of rollers comprises an upper and a lower roller arranged above and below the path of the sheet metal bands, respectively.
  • the guiding rollers 16 and 19 are free-running and may be mounted in fixed bearings at a distance from each other in each pair that slightly exceeds twice the thickness of the sheet metal bands to be passed between them.
  • each lower feeding roller 17 or 18 may be elevated from a lowered position, in which it is vertically well spaced from the corresponding upper feeding roller, to a lifted position, in which, the sheet metal band is firmly gripped between the cooperating pair of rollers with a heavy but slightly yieldable pressure.
  • the apparatus comprises a vertically movable, transverse box beam 21, which is supported by a pair of hydraulic lifting jacks 22, the cylinders of which are standing on and secured to the foot structure 13.
  • the punching equipment comprises a lower table 23 resting on top of the box beam 21, and an upper holder 24 secured by bolts or the like to the lower end of the crossbeam 12.
  • the table 23 is near its respective ends provided with upstanding guiding posts 25 which extend through and are guided in corresponding holes in the holder 24 to provide for a perfect registration between the holder and the table, when the latter is vertically moved by the jacks 22.
  • Each punch 27 is surrounded by a spring-loaded holding-up plate 28, which is actuated by a number of heavy springs 29.
  • each die member 26 and its related punch 27 are made of hard and weanresistant material, such as hardened steel or sintered carbide, and formed to produce, when pressed against opposite sides of the lap joint section between the sheet metal bands 1 and 2, a pair of cuts 4 and 5 therein as illustrated in FIGS. 12 and 13.
  • the detailed configuration of the tools 26 and 27 is well known per se and, therefore, it seems to be no need for describing them here.
  • the holding-up plate 28 also is of a sort well known from conventional punching presses. Its primary purpose is to keep the two sheet metal layers of the joint section properly together and prevent their relative displacement during the punching operation.
  • the holding-up plate 28 also is of a sort well known from conventional punching presses. Its primary purpose is to keep the two sheet metal layers of the joint section properly together and prevent their relative displacement during the punching operation.
  • the holding-up plates will also assist when the interlocking engagement is established.
  • a fixed shelf 30 which will prevent the free end portion of the sheet metal band 2 from sagging when entering.
  • a V-shaped guiding member 31 adapted to prevent the foremost end of the sheet metal band 2 from being stopped by the die member itself.
  • a shaft 32 having spaced fingers 33 extending radially therefrom. This shaft 32 may be rotated back and forth to swing the fingers 33 between an inoperative position shown in dash-and-dot lines and an operative position shown in full lines.
  • the fingers 33 do not only depress the rear end portion of the sheet metal band 1 in order to make certain that the foremost end of the succeeding band 2 will be received above the same, but also serve as stop members for properly positioning the foremost end of the band 2 under the dies 26.
  • FIG. 3 the shelf 30 and the guiding members 31 have been omitted for the sake of clarity.
  • each of the shelves carries a pair of guiding wheels 34 freely rotatable about vertical spindles which are, preferably, adjustable towards and away from each other, so that the wheels can be accommodated to the width of the sheet metal bands to be passed through the apparatus and caused to cooperate with the side edges of said bandsIAs
  • the apparatus also comprises two driving motors 37 and 38 connected to each one of the upper feeding rollers 17 and 18. These driving motors are mounted on the outer side of one of the end walls 14, and each motor includes a braking arrangement (not shown) so as to permit alternative driving or braking of the related feeding roller.
  • FIGS. 5-10 also indicate the provision of certain sensing and operation releasing means illustrated in the form of a lamp 39 throwing a beam oflight upwards into a photocell 40 when there is no sheet metal band passing.
  • the photocell is supposed to be incorporated in an electrical circuit adapted to automatically start the operation of the apparatus at a suitable time before the rear end of band 1 has reached the same. Any other suitable means may, of course, be substituted for the same purpose.
  • the sensing and operation releasing means may be located in any suitable place in front of the feeding-in end or side of the apparatus.
  • FIG. 5 illustrates, how the sheet metal band 1 is running freely through the apparatus from left to right, when the apparatus is inoperative. It also illustrates that the rear end of band I has just passed the line between the lamp 39 and the photocell 40, so that the light beam from the lamp will reach the photocell and, hence, put the apparatus into action. It should be kept in mind that the sheet metal band 1 is ordinarily pulled through the apparatus by feeding means included in the band-treating plant, so that the feeding rollers 17 and 18 of the apparatus are either running completely free or are at standstill.
  • the number of locks and consequently the number of dies and punches has to be selected in a manner to fit the character and width of the sheet metal bands to be joined.
  • the dimensions of the cuts produced in the overlapping sheet metal portions and the distance between each pair of cuts should in turn be accommodated to the thickness of the sheet metal bands, so that locks of a larger size are used in thick sheet metal bands and vice versa.
  • the feeding rollers 18 in the form of apparatus hereinbefore described must be very sturdy because they have to perform the heaviest work, while the feeding rollers 17 have a more easy task. This means that the rollers 17 must not be identical with the rollers 18 as shown,
  • the shaft 32 with the fingers 33 thereon may be utilized as a sensing member in such a manner that, when the fingers 33 are hit by the foremost end of the succeeding sheet metal band 2 and thereby caused to swing in the counterclockwise direction, the corresponding rotation of the shaft 32 may release the sequence of operations of the apparatus illustrated in FIGS. 8, 9 and 10.
  • An apparatus for joining overlapping end portions of separate sheet metal strips comprising:
  • a stationary punching press comprising a plurality of punch means in said press and disposed across the width of the strip, each of said punch means being operative when actuated to form, acrossthe width of the overlapping end portions of the strips, adjacent pairs of separate cuts having laterally offset ends extending in the longitudinal directions of the strips, thus defining between each pair of cuts a depressed web portion having a narrower end, a wider end and an angled intermediate portion therebetween, both ends remaining attached to the punched sheet metal strips,
  • first jack means for positively varying the mutual distance between said first rollers and for temporarily forcing them together to thereby cause them to grip the sheet metal strips passing therebetween,
  • first means for alternately driving and braking at least one of said first rollers to cause said first rollers to alternately serve as a feeding-in and positioning mechanism for the foremost end portion of a succeeding sheet metal strip and as a retainer for said joining process
  • a second pair of cooperating rollers located at the outlet side of said punching press, and operative to pull the preceding strip at the end of the punching cycle and while the succeeding strip is still retained by said first rollers to effect positive engagement of said depressed web portions extending across the width of said end portions of said strips,
  • second means for positively varying the mutual distance between said second rollers and for temporarily forcing them together to thereby cause them to grip the sheet metal strips passing therebetween and to also subject the lap-joint between such strips to a deforming pressure
  • second means for alternately driving and braking at least Inn one of said second rollers to cause said second rollers to serve firstly as a positioning mechanism for the rearmost end portion of a preceding sheet metal strip, secondly as a puller of said strip, and thirdly as a roller press for compressing the locks formed between the strip end portions.
  • An apparatus including deflecting means between said press and said second rollers for temporarily deflecting the rear end of the preceding sheet metal strip during the introduction of the foremost end of the succeeding sheet metal strip into said press by operation of said first rollers to assure correct overlapping of the two strip ends to be simultaneously punched.
  • said second means includes sensing means comprising a lamp and a photocell disposed in the beam of said lamp, and associated control circuit means operative to control the alternate driving and braking of at least one of said second rollers.
  • An apparatus including guide means operative to align the sheet metal strips which are fed into and out of said stationary punching press.
  • said guide means comprises a first pair of laterally opposed, horizontally disposed wheels and a first pair of guiding rollers located at the inlet side of said first pair of cooperating rollers, a first pair of upstanding guiding posts disposed between said first pair of cooperating rollers and the inlet side of said punching press, a second pair of laterally opposed, horizontally disposed wheels and a second pair of guiding rollers located at the outlet side of said second pair of cooperating rollers, and a second pair of upstanding guiding posts disposed between said second pair of cooperating rollers and the outlet side of said punching press.
  • each wheel in each of said first and second pairs of laterally opposed, horizontally disposed wheels is adjustable in its position relative to the other paired wheel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US884801A 1968-12-30 1969-12-15 Apparatus for joining sheet metal bands Expired - Lifetime US3641960A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2222293A1 (zh) * 1973-03-22 1974-10-18 Wean United Inc
ES2137081A1 (es) * 1996-08-02 1999-12-01 Escola Del Treball Del Ripolle Maquina soldadora de bandas metalicas perfeccionada.
US20090223269A1 (en) * 2008-03-07 2009-09-10 Metal Industries Research & Development Centre Method and apparatus for continuously manufacturing metal sheets
WO2014033037A1 (de) * 2012-09-03 2014-03-06 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Verfahren und vorrichtung zum verbinden von metallbändern
WO2014114541A1 (de) * 2013-01-22 2014-07-31 Andritz Sundwig Gmbh Vorrichtung zum verbinden von aufeinanderfolgend in eine bandbehandlungsanlage einlaufenden metallflachprodukten

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB417821A (en) * 1933-01-06 1934-10-12 Timmerbeil Erich Method of and tool for joining the ends of iron bands by means of interengaging slits made upon the band ends to be joined
US1987176A (en) * 1934-04-20 1935-01-08 United Eng Foundry Co Method and apparatus for stitching metal strip
US2945462A (en) * 1955-06-17 1960-07-19 J B Ehrsam & Sons Mfg Company Splicing machine and method
AT226040B (de) * 1960-01-05 1963-02-25 Thyssen Huette Ag Mit Warmbandbunden beschickte Zuführungsstrecke zu einer Beizanlage eines Breitbandwalzwerkes
US3411469A (en) * 1966-01-03 1968-11-19 Koppy Tool Corp Apparatus for securing ends of flat strip material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB417821A (en) * 1933-01-06 1934-10-12 Timmerbeil Erich Method of and tool for joining the ends of iron bands by means of interengaging slits made upon the band ends to be joined
US1987176A (en) * 1934-04-20 1935-01-08 United Eng Foundry Co Method and apparatus for stitching metal strip
US2945462A (en) * 1955-06-17 1960-07-19 J B Ehrsam & Sons Mfg Company Splicing machine and method
AT226040B (de) * 1960-01-05 1963-02-25 Thyssen Huette Ag Mit Warmbandbunden beschickte Zuführungsstrecke zu einer Beizanlage eines Breitbandwalzwerkes
US3411469A (en) * 1966-01-03 1968-11-19 Koppy Tool Corp Apparatus for securing ends of flat strip material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2222293A1 (zh) * 1973-03-22 1974-10-18 Wean United Inc
ES2137081A1 (es) * 1996-08-02 1999-12-01 Escola Del Treball Del Ripolle Maquina soldadora de bandas metalicas perfeccionada.
US20090223269A1 (en) * 2008-03-07 2009-09-10 Metal Industries Research & Development Centre Method and apparatus for continuously manufacturing metal sheets
WO2014033037A1 (de) * 2012-09-03 2014-03-06 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Verfahren und vorrichtung zum verbinden von metallbändern
WO2014114541A1 (de) * 2013-01-22 2014-07-31 Andritz Sundwig Gmbh Vorrichtung zum verbinden von aufeinanderfolgend in eine bandbehandlungsanlage einlaufenden metallflachprodukten

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