EP0176052B1 - Aufreissbares Dosenteil sowie Verfahren und Vorrichtung zu dessen Herstellung - Google Patents

Aufreissbares Dosenteil sowie Verfahren und Vorrichtung zu dessen Herstellung Download PDF

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Publication number
EP0176052B1
EP0176052B1 EP85111945A EP85111945A EP0176052B1 EP 0176052 B1 EP0176052 B1 EP 0176052B1 EP 85111945 A EP85111945 A EP 85111945A EP 85111945 A EP85111945 A EP 85111945A EP 0176052 B1 EP0176052 B1 EP 0176052B1
Authority
EP
European Patent Office
Prior art keywords
welded
tongue
thickened portion
member according
sheet
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
Application number
EP85111945A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0176052A2 (de
EP0176052A3 (en
Inventor
Paul Opprecht
Werner Urech
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.)
Elpatronic AG
Original Assignee
Elpatronic 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 Elpatronic AG filed Critical Elpatronic AG
Publication of EP0176052A2 publication Critical patent/EP0176052A2/de
Publication of EP0176052A3 publication Critical patent/EP0176052A3/de
Application granted granted Critical
Publication of EP0176052B1 publication Critical patent/EP0176052B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/383—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures scoring lines, tear strips or pulling tabs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/42—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions with cutting, punching, or cutter accommodating means
    • B65D17/46—Wires, strings or the like, e.g. rip cords
    • B65D17/462—Tearing-strips or -wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/42—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions with cutting, punching, or cutter accommodating means
    • B65D17/46—Wires, strings or the like, e.g. rip cords
    • B65D17/462—Tearing-strips or -wires
    • B65D17/464—Tearing-strips or -wires with tongues or tags for engagement by slotted keys

Definitions

  • the invention relates to a tearable can part made of sheet metal with a pair of incisions which laterally delimit a tear strip, and a flap which is welded onto the tear strip as a separate sheet metal part with a preformed end and extends in the longitudinal direction thereof.
  • Such can parts are rolled out of an initially flat sheet metal blank in such a way that the two longitudinal edges overlap one another, and these are then welded together to form a longitudinal seam, so that a cylindrical can body is formed. Finally, a complete can is produced from this, in that the two end faces of the can body are closed by crimping with a lid or a base. To tear open the can, a key is placed on the flap on the can body, which is unrolled at the nearest edge of the flange.
  • the object of the invention is to make opening the can easier and more secure, but without complicating the manufacture or making it difficult to attach the can key.
  • the tab has a thickened portion at its welded end, which is formed by an end part bent over in the direction of the other, free end of the tab.
  • the invention is particularly suitable for use in a can part with two longitudinal edges which are welded or weldable in an overlapping manner.
  • the tab is preferably welded on outside the overlap area of the longitudinal edges. This avoids any influence of the flap welding on the longitudinal seam welding. It has been found that the tab according to the invention can be welded on at any point on the tear strip and that no initial scratching is required; the positioning of the tab in relation to the can part with which it is to be welded is therefore possible with simple means and with little expenditure of time.
  • the thickening of the tab projects outwards, away from the can part.
  • the tab according to the invention can be placed on the sheet metal of the can part as smoothly as a non-bent tab, so that it does not, or in any case not disruptively, protrude from the can part and, furthermore, the risk is extremely low that an impact on the Flap an unintentional perforation arises.
  • the intended marking can be made even easier by the fact that the thickening ends in an edge, from which at least a section extends obliquely to the scratches. It is advantageous if the thickening has the shape of an arrow pointing towards the free end of the tab. In particular, the thickening expediently has the shape of a rectangle and an adjoining isosceles triangle, the legs of which form the edge.
  • the tab preferably has a zone prepared for welding with a corrugated or waffle-like surface structure.
  • Can parts according to the invention can be Manufacture by a method in which a flat sheet metal blank provided with scoring is rolled into a cylinder with overlapping longitudinal edges, which are then welded to one another. This method is further developed according to the invention in that an end part of the tab is bent to form a thickening, that the tab is welded to the tear strips of the flat sheet metal blank in the region of the thickening and that the sheet metal blank is only rolled afterwards.
  • a device provided with a plurality of rollers for rolling the sheet metal blanks which is further developed according to the invention in that those rollers which are intended to act on the side of the sheet metal blank provided as the outside of the cylinder each have an annular groove whose Width and depth are somewhat larger than the width or thickness of the welded-on tab including its thickening.
  • a cylindrical socket part 10 is shown, which consists for example of tin plate with a thickness of 0, 2 mm.
  • the box position i has an outer longitudinal edge 12 and an inner longitudinal edge 14 as well as a pair of circumferential outer scratches 16 which extend at right angles to the longitudinal edges and delimit a tear strip 18 between them.
  • the tear strip 18 can have one or more further scratches running parallel to the scratches 16.
  • An elongated tab 20 is welded to the tear strip 18, which consists, for example, of tinplate with a thickness of 0.4 mm and extends in the longitudinal direction of the tear strip 18 without reaching one of the longitudinal edges 12 or 14 of the can part 10.
  • the welded-on or welded-on end 22 has an edge 24 turned away from the can part 10 and extending towards the other end 26 which is still free after the tab 20 has been welded on.
  • the free end 26 is tapered in a trapezoidal shape to make it easier to insert a commercially available key for tearing open the can part 10.
  • the folded edge 24 of the flap 20 has a rectangular area in all of the examples shown in FIGS. 2a-2d, which only takes up part of the length according to FIGS. 2a and 2b, while the entire length of the folded edge 24 according to FIGS. 2c and 2d .
  • a triangular area adjoins the rectangular area, so that the folded edge 24 is generally arrow-shaped.
  • the folded edge 24 ends with an outer edge 28, as seen from the can part 10, which points arrow-shaped towards the free end 26 according to FIGS. 2a and 2b, but runs transversely to the scratches 16 according to FIGS. 2c and 2d.
  • the tab 20 has, on its side facing away from the folded edge 24, a zone 30 designed for welding to the tear strip 18 with a surface structure which is corrugated according to FIGS. 2a and 2c, but is preferably waffle-shaped according to FIGS. 2b and 2d so that it consists of a multitude of small, pyramid-shaped elevations.
  • a surface structure is intended to improve the current transfer and to avoid spattering of tin when the tab 20 is welded to the tear strip 18 using an electrical resistance spot welding method.
  • zone 30 that part of the tab 20 which is designed to insert a key and tapers towards the free end 26 is offset by a slight offset 32.
  • the tab 20 is only welded onto the tear strip 18 by means of two welding electrodes 34 and 36 when the two longitudinal edges 12 and 14 have already been welded in an overlapping manner in the usual manner.
  • a rail 48 begins, around which each sheet metal blank 38 is rolled and along which it is then moved axially as a cylindrical can part 10.
  • the rail 48 has guide edges 50 and 52 which guide the longitudinal edges 12 and 14 of the can part 10 in such a way that they approach each other and eventually overlap in order to form an overlap seam by means of electrical resistance roller seam welding; in this regard, reference is made, for example, to DE-C 2 559 671.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Making Paper Articles (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP85111945A 1984-09-25 1985-09-20 Aufreissbares Dosenteil sowie Verfahren und Vorrichtung zu dessen Herstellung Expired EP0176052B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4582/84A CH682906A5 (de) 1984-09-25 1984-09-25 Aufreissbares Dosenteil sowie Verfahren und Vorrichtung zu dessen Herstellung.
CH4582/84 1984-09-25

Publications (3)

Publication Number Publication Date
EP0176052A2 EP0176052A2 (de) 1986-04-02
EP0176052A3 EP0176052A3 (en) 1987-11-11
EP0176052B1 true EP0176052B1 (de) 1989-12-13

Family

ID=4278784

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85111945A Expired EP0176052B1 (de) 1984-09-25 1985-09-20 Aufreissbares Dosenteil sowie Verfahren und Vorrichtung zu dessen Herstellung

Country Status (10)

Country Link
US (3) US4662534A (es)
EP (1) EP0176052B1 (es)
JP (1) JPS61123434A (es)
BR (1) BR8504714A (es)
CH (1) CH682906A5 (es)
DE (2) DE3515812A1 (es)
ES (2) ES8608354A1 (es)
FI (1) FI79273C (es)
FR (1) FR2570679B1 (es)
GB (1) GB2165205B (es)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH658034A5 (de) * 1985-04-09 1986-10-15 Elpatronic Ag Aufreissbares dosenteil.
CH678501A5 (es) * 1989-05-16 1991-09-30 Elpatronic Ag
US5209625A (en) * 1989-08-22 1993-05-11 Elpatronic Ag Apparatus for rounding and conveying onwards sheet-metal blanks for can bodies
CH680714A5 (es) * 1989-08-22 1992-10-30 Elpatronic Ag
DE10333581A1 (de) * 2003-07-24 2005-02-24 Hofbräuhaus Traunstein Josef Sailer KG Glasgefäß für kohlensäurehaltige Getränke
US20100251798A1 (en) * 2009-04-06 2010-10-07 The Coca-Cola Company Method of Manufacturing a Metal Vessel
CN101767672B (zh) * 2009-12-28 2012-01-11 吴江市华源印铁制罐有限责任公司 加工卷开式易开合罐子的跳焊锡焊组合工艺
JP7027122B2 (ja) * 2017-10-27 2022-03-01 シロキ工業株式会社 車両用ドアサッシュのシーム溶接方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0167855A2 (de) * 1984-07-12 1986-01-15 Elpatronic Ag Aufreissbarer Dosenrumpf

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE148752C (es) *
DE148750C (es) *
GB324996A (en) * 1928-11-09 1930-02-10 Union Can Company Proprietary Improvements in means for use in opening sheet metal containers
US1924472A (en) * 1930-11-28 1933-08-29 Thomson George Miller Method of and means for manufacturing sound absorbing material
US2187740A (en) * 1936-05-09 1940-01-23 American Can Co Apparatus for producing can bodies
US2353728A (en) * 1937-07-13 1944-07-18 American Can Co Apparatus for producing can bodies
US2315535A (en) * 1940-04-16 1943-04-06 American Can Co Blank feeder for can bodymakers
US2753075A (en) * 1951-12-24 1956-07-03 American Can Co Tear open container with separate tongue
US2806628A (en) * 1955-05-27 1957-09-17 Raytheon Mfg Co Tear tabs for tin cans and methods for forming them
US2965263A (en) * 1955-07-30 1960-12-20 Ebauches Sa Charging device
DE1017042B (de) * 1955-10-21 1957-10-03 Continental Can Co Blechdose mit ueberlappt geschweisster Laengsnaht und Aufreissstreifen am Umfang des Rumpfes
US3339790A (en) * 1965-09-29 1967-09-05 Gregory Ind Inc Easy-open container
DE2532976B2 (de) * 1975-03-19 1978-03-23 Opprecht, Paul, Bergdietikon, Aargau (Schweiz) Vorrichtung zum halb- oder vollautomatischen elektrischen Widerstands-Längsnahtschweifien von Dosenkörpern
US4445620A (en) * 1982-05-21 1984-05-01 Minnesota Mining And Manufacturing Company Tamper-proof closure for container
CH669365A5 (es) * 1984-07-12 1989-03-15 Elpatronic Ag
CH658034A5 (de) * 1985-04-09 1986-10-15 Elpatronic Ag Aufreissbares dosenteil.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0167855A2 (de) * 1984-07-12 1986-01-15 Elpatronic Ag Aufreissbarer Dosenrumpf

Also Published As

Publication number Publication date
FI853656L (fi) 1986-03-26
JPH0525576B2 (es) 1993-04-13
EP0176052A2 (de) 1986-04-02
GB8522467D0 (en) 1985-10-16
ES290681Y (es) 1987-04-01
GB2165205A (en) 1986-04-09
FI79273C (fi) 1989-12-11
ES8608354A1 (es) 1986-07-16
US4915562A (en) 1990-04-10
DE3515812C2 (es) 1987-10-29
ES290681U (es) 1986-07-16
FR2570679B1 (fr) 1990-02-02
DE3574694D1 (de) 1990-01-18
JPS61123434A (ja) 1986-06-11
DE3515812A1 (de) 1986-04-03
FI79273B (fi) 1989-08-31
FR2570679A1 (fr) 1986-03-28
GB2165205B (en) 1988-09-01
FI853656A0 (fi) 1985-09-24
EP0176052A3 (en) 1987-11-11
BR8504714A (pt) 1986-07-22
US4795295A (en) 1989-01-03
ES547272A0 (es) 1986-07-16
US4662534A (en) 1987-05-05
CH682906A5 (de) 1993-12-15

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