EP0325123B1 - Method of making a cylindrical metal container - Google Patents
Method of making a cylindrical metal container Download PDFInfo
- Publication number
- EP0325123B1 EP0325123B1 EP89100209A EP89100209A EP0325123B1 EP 0325123 B1 EP0325123 B1 EP 0325123B1 EP 89100209 A EP89100209 A EP 89100209A EP 89100209 A EP89100209 A EP 89100209A EP 0325123 B1 EP0325123 B1 EP 0325123B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piece
- metal sheet
- container
- lugs
- carrying handle
- 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 - Lifetime
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Classifications
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- 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
- B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
- B65D7/42—Details of metal walls
- B65D7/48—Local reinforcements, e.g. adjacent closures
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- 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
- B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
- B21D51/2676—Cans or tins having longitudinal or helical seams
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- 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
- B65D43/00—Lids or covers for rigid or semi-rigid containers
- B65D43/02—Removable lids or covers
- B65D43/0202—Removable lids or covers without integral tamper element
- B65D43/0204—Removable lids or covers without integral tamper element secured by snapping over beads or projections
- B65D43/0212—Removable lids or covers without integral tamper element secured by snapping over beads or projections only on the outside, or a part turned to the outside, of the mouth
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- 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
- B65D43/00—Lids or covers for rigid or semi-rigid containers
- B65D43/02—Removable lids or covers
- B65D43/0202—Removable lids or covers without integral tamper element
- B65D43/0214—Removable lids or covers without integral tamper element secured only by friction or gravity
- B65D43/0218—Removable lids or covers without integral tamper element secured only by friction or gravity on both the inside and the outside of the mouth of the container
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- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00018—Overall construction of the lid
- B65D2543/00064—Shape of the outer periphery
- B65D2543/00074—Shape of the outer periphery curved
- B65D2543/00092—Shape of the outer periphery curved circular
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- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00018—Overall construction of the lid
- B65D2543/00259—Materials used
- B65D2543/00277—Metal
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- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
- B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
- B65D2543/0049—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container
- B65D2543/00509—Cup
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- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
- B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
- B65D2543/00537—Contact between the container and the lid on the inside or the outside of the container on the outside, or a part turned to the outside of the mouth of the container
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- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
- B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
- B65D2543/00555—Contact between the container and the lid on the inside or the outside of the container on both the inside and the outside
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- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
- B65D2543/00574—Contact between the container and the lid secured locally, i.e. a lot less than half the periphery
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- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
- B65D2543/00592—Snapping means
- B65D2543/00601—Snapping means on the container
- B65D2543/00611—Profiles
- B65D2543/00638—Rolled edge
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- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
- B65D2543/00592—Snapping means
- B65D2543/00601—Snapping means on the container
- B65D2543/00675—Periphery concerned
- B65D2543/00685—Totality
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- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
- B65D2543/00592—Snapping means
- B65D2543/00712—Snapping means on the lid
- B65D2543/00722—Profiles
- B65D2543/00731—Groove or hollow bead
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- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00444—Contact between the container and the lid
- B65D2543/00592—Snapping means
- B65D2543/00712—Snapping means on the lid
- B65D2543/00787—Periphery concerned
- B65D2543/00814—Dots
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- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00824—Means for facilitating removing of the closure
- B65D2543/00888—Means for facilitating removing of the closure by applying lever forces
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- 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
- B65D2543/00—Lids or covers essentially for box-like containers
- B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
- B65D2543/00824—Means for facilitating removing of the closure
- B65D2543/00888—Means for facilitating removing of the closure by applying lever forces
- B65D2543/00898—Means for facilitating removing of the closure by applying lever forces by means of a coin or other tool in recesses or similar on container or lid
Definitions
- the invention relates to a method for producing a cylindrical metal container from a hot-tinned piece of sheet metal, the side edges of which are approximately as long as the circumference of the container and the longitudinal edges of which have a length which corresponds approximately to the height of the container, with support eyelets attached to the cylindrical side wall, the have a cup-shaped body, which has a base with an opening for receiving a wire bracket and a circular edge part, from which elongated, substantially perpendicular to the side edges, diametrically opposed fastening tabs start, with which the bracket eyes are initially on the flat and straight limited piece of sheet metal are fixed by resistance welding that they extend in their longitudinal direction substantially parallel to the longitudinal edges of the sheet metal piece, which is then rolled into a cylinder, the longitudinal edges of which a Do not overlap by more than 0.5 mm and which are connected by a weld.
- Bracket eyelets are usually attached to a cylindrical metal container only after the can body has been brought from a flat, straight-line sheet metal piece into a cylindrical shape and the edges have been welded by a longitudinal fold. The then required attachment of the eyelets to the round can body by spot welding takes a lot of time, and it is usually not possible to produce more than 20 can bodies per minute. Attempts to hump-weld the eyelets to the cylindrical can bodies have caused the cylinder to flatten where the eyelets were attached. Furthermore, it often happened that the eyelets flake off when they were not sufficiently welded.
- the support bracket eyelets with diametrically opposed fastening tabs are said to be the first are welded onto a flat and straight-line sheet metal piece, from which the cylindrical side wall of the container is then formed.
- the container wall is stiffened considerably in the area of the fastening tabs of the support bracket eyelets and can no longer simply be rolled into a cylinder. It can also happen that the fastening tabs flake off when the sheet metal piece is rolled into a cylinder.
- bracket eyelets with two diametrically opposed fastening tabs to a cylindrical container (US-A-3 476 289), in which the tabs are provided with holes which have a sharp edge projecting against the cylinder wall. This sharp edge penetrates an insulating sleeve surrounding the metal container and collapses when it is attached to the container by electrical resistance welding.
- the object of the invention is a method of the beginning Improved type for producing a cylindrical metal container so that the bracket eyelets can be attached very quickly and easily by resistance welding and neither jump off when forming the container, nor dent it.
- This configuration has the advantage that the fastening tabs of the bracket eyelets do not hinder the subsequent rolling of the can into a cylinder and cannot flake off. Rather, rapid resistance welding of the longitudinal fold is also possible, as a result of which the size of the metal piece required for producing the container is minimized and the costs required for this are reduced.
- fastening tabs of the mounting bracket eyelets are welded to the flat sheet metal pieces at only one point of each tab by projection welding at a rate of 250 tab pairs per minute.
- the method according to the invention has the advantage that the overlap of the longitudinal edges can be precisely controlled and it is possible to attach the eyelets precisely to a flat, rectangular metal sheet and then to roll or roll it smoothly into a cylindrical can body.
- a cup-shaped eyelet 10 is shown, which is used to hold the ends of a bracket or wire handle for carrying the container.
- the cup-shaped eyelet 10 has a base 12 and a circular edge 13. In the base 12 there is a central opening 15 which penetrates the eyelet and receives the ends of the bracket.
- Two fastening tabs 16 extend from diametrically opposite sides of the edge 13.
- the cup-shaped eyelet 10 is made by conventional hot pressing from a material which is 95 lbs. (0.0105 ”) tinplate.
- the diameter of the base plate 12 is designated by D, which is approximately 0.750 ".
- the width W of the fastening tabs 16 is approximately 40% of the diameter D and the length L of the tabs 16 makes approximately 25% of the diameter D. out.
- the first step consists in forming a cylindrical body or can body from a flat piece of sheet metal.
- the piece of sheet metal was cut from the sheet metal into a rectilinear plate 20 which has mutually parallel, upper and lower edges 21, the length of which is approximately equal to the circumference of the cylindrical container and the mutually parallel longitudinal edges 22 which are approximately equal to the height of the paint container .
- On the rectangular plate 20 there are two eyelets which are located at a mutual distance from one another which corresponds to the diameter of the paint container, but is also not equal to half the container circumference.
- the diameter would be approximately 6,500 "and the dimensions" a "and” b "in Figure 2 would be equal to 5,110" and 1,745 ", respectively.
- the eyelets 10 can be positioned precisely on it and easily clamped or otherwise attached to weld the tabs 16 to the straight sheet 20.
- a common Larson hump welding machine could be used to weld the tabs 16 to the right-angled sheet piece 20.
- Such a machine has the capacity to weld 0.3 eyelets / second, which would produce 20 can bodies / minute when used in conjunction with known feeders, such as those commonly used in can production lines be used.
- the tabs 16 be resistance welded to a rectangular piece of sheet metal 20 by a resistance welding machine 30, as shown schematically in Fig. 3a.
- Such resistance welding machines could be of the type used to produce a continuous longitudinal fold (explained in more detail below) and modified to fix the tabs by resistance welding as the piece of sheet metal passes.
- Particularly modified projection welding machines could significantly reduce the welding time and it can be assumed that approximately 250 straight sheet metal pieces / minute can be passed through such a specially adapted projection welding machine.
- the thickness of the sheet metal plus the fastening tabs 16 is approximately twice the thickness of the rectangular sheet metal piece 20 and welded connections are only present at two locations which are at a vertical distance from one another and parallel to the longitudinal edge 22 and are arranged perpendicular to the upper and lower side edge 21.
- This important feature allows the right-angled sheet metal piece 20 to be rolled or rolled into a correct cylinder using conventional cylinder profile rollers 40, as shown schematically in Fig. 3b.
- a conventional cylinder profile roller machine for example the model no. EWL-250 from Soudronic AG or the model no. FBW-22-420-S from Fael AG can be used, which is also used in known systems.
- the machines described are profile rolling machines, in contrast to other known cylinder rolling machines, which could theoretically also be used.
- weld connection between the tabs 16 and the rectangular plate 20 must not loosen during the rolling, while at the same time an accurate rolling
- the dimensions given above are limit values without the can side wall being pushed in.
- the overlap of the longitudinal edges 22 can be precisely controlled and is actually carefully controlled so that it is not more than 0.5 mm.
- the overlapping longitudinal edges 22 are continuously welded to one another with a conventional longitudinal seam welding machine, as is shown schematically in FIG. 3c and designated by 20.
- Continuous longitudinal seam welding machines that could be used to perform the longitudinal seam welding are, for example, the EWL-250 model from Soudronic A.G. or the model FBW-22-420-S from Fael A.G.
- a cylindrical can body 60 is formed and this can body is then subjected to the normal manufacturing steps in can making, which include folding a bottom at one end 61 and a ring at the other end 60 of the can body 62. If the can body is a ringless can body, the second end 60 is appropriately profiled.
- the flat sheet metal piece 20 has previously been processed by a series of tools which impressed impressions into the rectangular sheet metal at the points where the eyelets 10 are welded on.
- the straight longitudinal edge 22 is distorted. This distortion, which occurs irregularly and is indicated by dimension X in Fig. 4, would exceed 0.5 mm and sometimes reach 1.0 mm. This is more than twice the allowable distance for water-based paint containers using the spray strip method mentioned above.
- the main idea of the invention is therefore to propose an improvement in the manufacture of cylindrical metal containers, which allows the permanent attachment of eyelets to the straight sheet in its flat state in such a way that the cylinder of the can body is then accurate and without distortion of the straight longitudinal edges of the rectangular sheet can be shaped.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
- Table Devices Or Equipment (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Tubes (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Extrusion Of Metal (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Herstellen eines zylindrischen Metallbehälters aus einem feuerverzinnten Blechstück, dessen Seitenränder etwa ebenso lang sind wie der Umfang des Behälters und dessen Längsränder eine Länge haben, die etwa der Höhe des Behälters entspricht, mit auf der zylindrischen Seitenwand befestigten Tragbügelösen, die einen napfförmigen Körper haben, der eine Grundfläche mit einer Öffnung zur Aufnahme eines Drahtbügels und ein kreisförmiges Randteil aufweist, von dem langgestreckte, im wesentlichen senkrecht zu den Seitenrändern verlaufende, diametral einander gegenüberliegende Befestigungslappen ausgehen, mit denen die Tragbügelösen zunächst derart auf dem ebenen und geradlinig begrenzten Blechstück durch Widerstandsschweißung befestigt werden, daß sie sich in ihrer Längsrichtung im wesentlichen parallel zu den Längsrändern des Blechstückes erstrecken, das anschließend zu einem Zylinder gerollt wird, dessen Längsränder einander nicht mehr als 0,5 mm überlappen und die durch eine Schweißnaht miteinander verbunden werden.The invention relates to a method for producing a cylindrical metal container from a hot-tinned piece of sheet metal, the side edges of which are approximately as long as the circumference of the container and the longitudinal edges of which have a length which corresponds approximately to the height of the container, with support eyelets attached to the cylindrical side wall, the have a cup-shaped body, which has a base with an opening for receiving a wire bracket and a circular edge part, from which elongated, substantially perpendicular to the side edges, diametrically opposed fastening tabs start, with which the bracket eyes are initially on the flat and straight limited piece of sheet metal are fixed by resistance welding that they extend in their longitudinal direction substantially parallel to the longitudinal edges of the sheet metal piece, which is then rolled into a cylinder, the longitudinal edges of which a Do not overlap by more than 0.5 mm and which are connected by a weld.
Tragbügelösen werden in der Regel an einem zylindrischen Metallbehälter erst dann angebracht, nachdem der Dosenkörper aus einem ebenen, geradlinig begrenzten Blechstück in eine zyindrische Form gebracht und die Ränder durch einen Längsfalz verschweißt worden sind. Die dann erforderliche Befestigung der Ösen am runden Dosenrumpf durch Punktschweißung erfordert viel Zeit, und es ist in der Regel nicht möglich, mehr als 20 Dosenrümpfe pro Minute herzustellen. Versuche, die Ösen durch Buckelschweißung an den zylindrischen Dosenrümpfen zu befestigen, führten zu einem Abflachen des Zylinders an denjenigen Stellen, wo die Ösen angebracht worden waren. Ferner kam es oft vor, daß die Ösen abplatzten, wenn sie nicht ausreichend festgeschweißt waren.Bracket eyelets are usually attached to a cylindrical metal container only after the can body has been brought from a flat, straight-line sheet metal piece into a cylindrical shape and the edges have been welded by a longitudinal fold. The then required attachment of the eyelets to the round can body by spot welding takes a lot of time, and it is usually not possible to produce more than 20 can bodies per minute. Attempts to hump-weld the eyelets to the cylindrical can bodies have caused the cylinder to flatten where the eyelets were attached. Furthermore, it often happened that the eyelets flake off when they were not sufficiently welded.
Nach einem älteren, gemäß Artikel 54 Absatz 3 zum Stand der Technik gerechneten Vorschlag (EP-A-316 754), von dem die vorliegende Erfindung ausgeht und dessen Merkmale am Beginn dieser Beschreibung näher erläutert sind, sollen die Tragbügelösen mit diametral einander gegenüberliegenden Befestigungslappen erst auf einem ebenen und geradlinig begrenzten Blechstück angeschweißt werden, aus dem dann die zylindrische Seitenwand des Behälters geformt wird. Bei einem solchen Verfahren besteht jedoch die Schwierigkeit, daß die Behälterwandung im Bereich der Befestigungslappen der Tragbügelösen erheblich versteift wird und sich nicht mehr einfach zu einem Zylinder rollen läßt. Ferner kann es geschehen, daß die Befestigungslappen beim Rollen des Blechstückes zu einem Zylinder abplatzen.According to an older proposal (EP-A-316 754), based on the state of the art according to Article 54 paragraph 3, from which the present invention is based and the features of which are explained in more detail at the beginning of this description, the support bracket eyelets with diametrically opposed fastening tabs are said to be the first are welded onto a flat and straight-line sheet metal piece, from which the cylindrical side wall of the container is then formed. With such a method, however, there is the difficulty that the container wall is stiffened considerably in the area of the fastening tabs of the support bracket eyelets and can no longer simply be rolled into a cylinder. It can also happen that the fastening tabs flake off when the sheet metal piece is rolled into a cylinder.
Es ist auch bereits bekannt, Tragbügelösen mit zwei diametral einander gegenüberliegenden Befestigungslappen an einem zylindrischen Behälter zu befestigen (US-A-3 476 289), bei dem die Lappen mit Löchern versehen sind, die einen gegen die Zylinderwand vorspringenden scharfen Rand aufweisen. Dieser scharfe Rand durchdringt eine den Metallbehälter umgebende Isolierhülle und fällt beim Befestigen am Behälter durch elektrische Widerstandsschweißung zusammen.It is also known to attach bracket eyelets with two diametrically opposed fastening tabs to a cylindrical container (US-A-3 476 289), in which the tabs are provided with holes which have a sharp edge projecting against the cylinder wall. This sharp edge penetrates an insulating sleeve surrounding the metal container and collapses when it is attached to the container by electrical resistance welding.
Bei diesem bekannten Verfahren muß zwischen dem Behälter und den Tragbügelösen eine elektrische Isolierschicht vorgesehen werden, und es besteht die Gefahr, daß die Behälterwandung beim Ansetzen der Tragbügelösen beschädigt wird.In this known method, an electrical insulating layer must be provided between the container and the bracket eyelets, and there is a risk that the container wall is damaged when attaching the bracket eyelets.
Aufgabe der Erfindung ist es, ein Verfahren der eingangs näher erläuterten Art zum Herstellen eines zylindrischen Metallbehälters so zu verbessern, daß die Tragbügelösen durch Widerstandsschweißung sehr schnell und einfach befestigt werden können und beim Formen des Behälters zu einem Zylinder weder abspringen, noch diesen eindellen.The object of the invention is a method of the beginning Improved type for producing a cylindrical metal container so that the bracket eyelets can be attached very quickly and easily by resistance welding and neither jump off when forming the container, nor dent it.
Diese Aufgabe wird mit der Erfindung dadurch gelöst, daß die Längsränder des Blechstückes mit einer Längsfalzschweißmaschine kontinuierlich verschweißt werden und daß die an dem Blechstück angeschweißten Tragbügelösen Befestigungslappen einfacher Dicke aufweisen, deren Breite etwa 40 % und deren Länge ungefähr 25 % des Durchmessers des kreisförmigen Randteiles der Tragbügelösen beträgt.This object is achieved with the invention in that the longitudinal edges of the sheet metal piece with a longitudinal seam welding machine are continuously welded and that the support bracket eyes welded to the sheet metal piece have fastening tabs of simple thickness, the width of which is approximately 40% and the length is approximately 25% of the diameter of the circular edge part of the support bracket eyes.
Diese Ausgestaltung hat den Vorteil, daß die Befestigungslappen der Tragbügelösen das nachfolgende Rollen der Dose zu einem Zylinder nicht behindern und auch nicht abplatzen können. Vielmehr ist auch ein schnelles Widerstandsschweißen des Längsfalzes möglich, wodurch die Größe des zum Herstellen des Behälters benötigten Metallstückes minimiert und die hierfür erforderlichen Kosten reduziert werden.This configuration has the advantage that the fastening tabs of the bracket eyelets do not hinder the subsequent rolling of the can into a cylinder and cannot flake off. Rather, rapid resistance welding of the longitudinal fold is also possible, as a result of which the size of the metal piece required for producing the container is minimized and the costs required for this are reduced.
Besonders zweckmäßig ist es, wenn die Befestigungslappen der Tragbügelösen an nur einem Punkt eines jeden Lappens durch Buckelschweißen mit einer Geschwindigkeit von 250 Lappenpaaren je Minute an den ebenen Blechstücken angeschweißt werden. Hierdurch wird eine bedeutende Produktionssteigerung erzielt und ein Abplatzen der Tragbügelösen beim anschließenden Rollen der Dosen mit Sicherheit verhindert.It is particularly expedient if the fastening tabs of the mounting bracket eyelets are welded to the flat sheet metal pieces at only one point of each tab by projection welding at a rate of 250 tab pairs per minute. As a result, a significant increase in production is achieved and chipping of the bracket eyes when the cans are subsequently rolled is prevented with certainty.
Ferner hat das Verfahren nach der Erfindung den Vorteil, daß die Überlappung der Längsränder genau kontrolliert werden kann und es möglich ist, die Ösen an einem ebenen, rechtwinkligen Metallblech genau anzubringen und dieses dann glatt zu einem zylindrischen Dosenrumpf zu rollen oder zu walzen.Furthermore, the method according to the invention has the advantage that the overlap of the longitudinal edges can be precisely controlled and it is possible to attach the eyelets precisely to a flat, rectangular metal sheet and then to roll or roll it smoothly into a cylindrical can body.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung und der beigefügten Zeichnung, in der das bevorzugte Verfahren an einem Beispiel näher erläutert ist. Es zeigt:
- Fig. 1
- eine perspektivische Darstellung der Tragbügelöse, wie sie nach der Erfindung an dem Dosenrumpf angebracht wird,
- Fig. 2
- eine Draufsicht auf die an dem ebenen Dosenblech befestigten Ösen,
- Fig. 3a, 3b und 3c
- schematische Darstellungen, die die Verfahrensschritte beim Formen des Dosenrumpfes zeigen und
- Fig. 4
- eine übertriebene Darstellung der Deformation der Blechzuschnittkante, wie sie bei Zuschnitten nach dem Stande der Technik auftritt.
- Fig. 1
- a perspective view of the bracket eyelet, as according to the invention on the can body is attached
- Fig. 2
- a plan view of the eyelets attached to the flat tin plate,
- 3a, 3b and 3c
- schematic representations showing the process steps in forming the can body and
- Fig. 4
- an exaggerated representation of the deformation of the sheet metal blank edge, as it occurs with blanks according to the prior art.
In den Zeichnungen, die nur zur Erläuterung der bevorzugten Ausführungform der Erfindung und nicht zu deren Beschränkung dienen, wird die Erfindung anhand der Herstellung eines zylindrischen, eine Gallone fassenden Farbbehälters aus Metall beschrieben. Derartige Behälter werden aus einem verzinnten Blechmaterial hergestellt, dessen Dicke üblicherweise in Pfund angegeben wird. Für eine Gallone (3,78 Liter) fassende Farbbehälter liegt die Dicke gewöhnlich zwischen 75 lbs. und 90 lbs., wobei die Zinnbeschichtung 0,25 lbs. beträgt. Die übliche Dicke des Materials liegt zwischen 0,0083 und 0,0099 Zoll. Gute Ergebnisse wurden mit einer Blechdicke von 0,0094 Zoll und einer Zinnbeschichtung von 0,25 lbs. erzielt. Man erkennt jedoch, daß die Erfindung innerhalb des Materialbereiches zufriedenstellend angewendet werden kann, der für Behältergrößen mit einer Gallone Fassungsvermögen angegeben ist. (1 lbs = 0,454 kg ; 1 Zoll = 2,54 cm)In the drawings, which serve only to explain the preferred embodiment of the invention and not to limit it, the invention is described with reference to the production of a cylindrical, gallon-colored paint container made of metal. Such containers are made from a tin-plated sheet material, the thickness of which is usually given in pounds. For a gallon (3.78 liter) paint container, the thickness is usually between 75 lbs. and 90 lbs. with the tin coating 0.25 lbs. is. The usual thickness of the material is between 0.0083 and 0.0099 inches. Good results were achieved with a sheet thickness of 0.0094 inches and a tin coating of 0.25 lbs. achieved. However, it can be seen that the invention can be satisfactorily applied within the range of materials specified for one gallon container sizes. (1 lbs = 0.454 kg; 1 inch = 2.54 cm)
In Fig. 1 ist eine napfförmige Öse 10 dargestellt, die zum Halten der Enden eines Bügels oder Drahtgriffes zum Tragen des Behälters dient. Die napfförmige Öse 10 hat eine Grundfläche 12 und einen kreisförmigen Rand 13. In der Grundfläche 12 befindet sich eine zentrale Öffnung 15, welche die Öse durchdringt und die Enden des Bügels aufnimmt. Von diametral einander gegenüberliegenden Seiten des Randes 13 aus erstrecken sich zwei Befestigungslappen 16. Die napfförmige Öse 10 wird durch übliches Warmpressen aus einem Material hergestellt, welches ein 95 lbs. (0,0105 ") Weißblech ist.In Fig. 1, a cup-
In den Fig. 1 und 2 ist der Durchmesser der Grundplatte 12 mit D bezeichnet, der etwa 0,750 " beträgt. Die Breite W der Befestigungslappen 16 beträgt etwa 40% des Durchmessers D und die Länge L der Lappen 16 macht ungefähr 25% des Durchmessers D aus.1 and 2, the diameter of the
Bei dem bekannten Verfahren zum Herstellen von Dosen besteht der erste Schritt darin, aus einem flachen Stück Blech einen zylindrischen Körper oder Dosenrumpf zu formen. Das Blechstück wurde aus dem Blech zu einer geradlinigen Platte 20 geschnitten, die zueinander parallele, obere und untere Ränder 21 hat, deren Länge annähernd gleich dem Umfang des zylindrischen Behälters sind und die zueinander parallele Längsränder 22 aufweist, die annähernd gleich der Höhe des Farbbehälters sind. Auf der rechteckigen Platte 20 sind zwei Ösen angebracht, die sich in einem gegenseitigen Abstand voneinander befinden, der dem Durchmesser des Farbbehälters entspricht, aber auch gleich dem halben Behälterumfang sein kein. Bei einem Standardfarbbehälter mit einer Gallone Fassungsvermögen würde der Durchmesser etwa 6,500 " betragen und die Abmessungen "a" und "b" in Fig. 2 würden gleich 5,110 " bzw. 1,745 " sein.In the known method for producing cans, the first step consists in forming a cylindrical body or can body from a flat piece of sheet metal. The piece of sheet metal was cut from the sheet metal into a
Da das Blech 20 eben ist, können die Ösen 10 auf ihm genau positioniert und zum Anschweißen der Lappen 16 an das geradlinige Blech 20 leicht angeklemmt oder auf andere Weise befestigt werden. Beispielsweise könnte eine gebräuchliche Larson-Buckelschweißmaschine zum Anschweißen der Lappen 16 an das rechtwinklige Blechstück 20 verwendet werden. Eine solche Maschine hat die Kapazität, 0,3 Ösen/Sekunde anzuschweißen, die damit 20 Dosenrümpfe/Minute herstellen würde, wenn sie in Verbindung mit bekannten Vorschubeinrichtungen verwendet wird, wie sie üblicherweise in Dosenfertigungsstraßen eingesetzt werden. Es ist insbesondere beabsichtigt, daß die Lappen 16 durch Widerstandsschweißung mit einer Widerstandsschweißmaschine 30 an einem rechtwinkligen Blechstück 20 befestigt werden, wie dies schematisch in Fig. 3a dargestellt ist. Solche Widerstandsschweißmaschinen könnten von der Type sein, wie sie zum Erzeugen eines kontinuierlichen Längsfalzes verwendet werden (weiter unten näher erklärt), und die so abgewandelt werden, daß sie die Lappen durch Widerstandsschweißung befestigen, während das Blechstück vorbeiläuft. Besonders abgewandelte Buckelschweißmaschinen könnten die Schweißzeit bedeutend reduzieren und es ist anzunehmen, daß etwa 250 geradlinige Blechstücke/Minute durch eine solche speziell angepaßte Buckelschweißmaschine hindurchgeführt werden können.Since the
Wenn die Ösen an das rechteckige Blechstück 20 angeschweißt sind, beträgt die Dicke des Bleches zuzüglich der Befestigungslappen 16 etwa das Doppelte der Dicke des rechteckigen Blechstückes 20 und Schweißverbindungen sind nur an zwei Stellen vorhanden, die sich in vertikalem Abstand voneinander befinden und parallel zum Längsrand 22 und senkrecht zum oberen und unteren Seitenrand 21 angeordnet sind. Dieses wichtige Merkmal erlaubt es, daß das rechtwinklige Blechstück 20 mit üblichen Zylinderprofilwalzen 40 zu einem richtigen Zylinder gerollt oder gewalzt werden kann, wie dies schematisch in Fig. 3b dargestellt ist. Hierzu kann eine übliche Zylinder-Profilwalzenmaschine, beispielsweise das Modell Nr. EWL-250 der Firma Soudronic A.G. oder das Modell Nr. FBW-22-420-S der Firma Fael A.G. verwendet werden, die auch bei bekannten Anlagen eingesetzt wird. Hierzu ist darauf hinzuweisen, daß die beschriebenen Maschinen Profilwalzenmaschinen sind, im Unterschied zu anderen bekannten Zylinder-Walzmaschinen, die theoretisch auch benutzt werden könnten. Im Hinblick darauf, daß die Schweißverbindung zwischen den Lappen 16 und der rechteckigen Platte 20 sich beim Walzen nicht lockern darf, während gleichzeitig ein genaues Walzen ohne Eindrücken der Dosenseitenwand möglich sein muß, sind die oben angegebenen Abmessungsverhältnisse Grenzwerte. Bei den in Fig. 3b dargestellten Profilwalzen kann die Überlappung der Längsränder 22 genau kontrolliert werden und wird tatsächlich auch sorgfältig so gesteuert, daß sie nicht mehr als 0,5 mm beträgt.If the eyelets are welded to the rectangular
Wenn das ebene Blech 22 auf diese Weise zu einem Zylinder gerollt wird, werden die einander überlappenden Längsränder 22 mit einer üblichen Längsfalzschweißmaschine, wie sie schematisch in Fig. 3c dargestellt und mit 20 bezeichnet ist, kontinuierlich miteinander verschweißt. Kontinuierlich arbeitende Längsfalzschweißmaschinen, die zum Ausführen der Längsfalzschweißung verwendet werden könnten, sind beispielsweise das Modell EWL-250 der Soudronic A.G. oder das Modell FBW-22-420-S der Firma Fael A.G. Mit dem Schweißen des Längsfalzes wird ein zylindrischer Dosenrumpf 60 geformt und dieser Dosenrumpf wird dann den normalen Fertigungsschritten bei der Dosenherstellung unterworfen, zu denen das Anfalzen eines Bodens an einem Ende 61 und eines Ringes am anderen Ende 60 des Dosenrumpfes 62 gehört. Wenn der Dosenrumpf ein ringloser Dosenrumpf ist, wird das zweite Ende 60 in geeigneter Weise profiliert. Diese Verfahrensschritte sind bei der Dosenherstellung bekannt und für sich genommen nicht Teil der vorliegenden Erfindung. Sie werden deshalb hier auch nicht im einzelnen beschrieben.If the
Wie weiter oben erläutert wurde, wurde das ebene Blechstück 20 bisher von einer Reihe von Werkzeugen bearbeitet, welche Eindrückungen in das rechteckige Blech an den Stellen einprägten, wo die Ösen 10 angeschweißt werden. Die Ösen 10, die einen Ringflansch anstelle von Lappen 16 haben, wurden dann in diese Eindrückungen geschoben und das Metall wurde über den Flansch gepreßt, um die Ösen in Stellung zu halten. Da das Metall sich einfach elastisch dehnt, gab es beim Formen des Zylinders kein Problem. Beim Gesenkformen wird jedoch der geradegerichtete Längsrand 22 verzerrt. Diese Verzerrung, die unregelmäßig auftritt und in Fig. 4 durch die Abmessung X angegeben ist, würde 0,5 mm überschreiten und manchmal 1,0 mm erreichen. Dies ist mehr als das Doppelte des zulässigen Abstandes für Behälter für Farbe auf Wassergrundlage, die das oben erwähnte Spray-Streifenverfahren benutzen. Dies wiederum erfordert eine breitere Überlappung der Längsränder in der Längsfalzschweißstation der Fig.3c (wenn die Längsfalze nicht verlötet werden) und das gleichmäßige Abschmelzen des Saumes, ohne Rücksicht auf die Verzerrung, hat zur Folge, daß eine Längsfalzschweißmaschine 50 mit höherer Kapazität oder eine langsamer arbeitende Schweißmaschine 50 benötigt wird, als die, die sonst verwendet werden würde.As explained above, the flat
Mit der Erfindung wird eine Verzerrung X beseitigt und die Längsfalzüberlappung kann auf die erwähnte Größe sorgfältig gesteuert werden, theoretisch ist sogar eine Stumpfschweißung der Längsränder 22 möglich. Eine Stumpfschweißung, als eine praktische Sache, ist jedoch derzeit bei den erwähnten Dicken und den Toleranzen, die für die Geradlinigkeit der Längsränder 22 eingehalten werden können, nicht durchführbar. Durch die Dimensionierung der Befestigungslappen 16 und ihrer Orientierung in einer geraden Linie parallel zu den Längsrändern 22 und nicht parallel zu den oberen und unteren Querrändern 21 kann ein exakter Zylinder gerollt werden, wie dies bei dem üblichen Zylinderformschritt in Fig. 3 b dargestellt ist.With the invention, a distortion X is eliminated and the longitudinal fold overlap can be carefully controlled to the size mentioned, theoretically even butt welding of the
Der wesentliche Gedanke der Erfindung besteht somit darin, eine Verbesserung bei der Herstellung zylindrischer Metallbehälter vorzuschlagen, die das dauerhafte Anbringen von Ösen an dem geradlinigen Blech in dessen ebenem Zustand in einer Weise gestattet, daß der Zylinder des Dosenrumpfes anschließend genau und ohne Verzerrung der geraden Längskanten des rechteckigen Bleches geformt werden kann.The main idea of the invention is therefore to propose an improvement in the manufacture of cylindrical metal containers, which allows the permanent attachment of eyelets to the straight sheet in its flat state in such a way that the cylinder of the can body is then accurate and without distortion of the straight longitudinal edges of the rectangular sheet can be shaped.
Claims (4)
- Process for producing a cylindrical metal container from a hot-galvanised piece of metal sheet (20), the side edges of which are approximately as long as the circumference of the container and the longitudinal edges of which are of a length which corresponds approximately to the height of the container, having carrying handle lugs (10) fastened on the cylindrical side wall, which lugs have a cup-shaped body which exhibits a base area (12) with an opening for receiving a wire handle and exhibits a circular edge part (13), from which elongated, diametrically opposite fastening lobes (16) extend, which lobes run essentially perpendicularly with respect to the side edges and by which the carrying handle lugs (10) are initially fastened by resistance welding on the flat and rectilinearly bounded piece of metal sheet (20) in such a way that they extend in their longitudinal direction essentially parallel to the longitudinal edges (22) of the piece of metal sheet (20), which is subsequently rolled to form a cylinder, the longitudinal edges (22) of which overlap each other no more than 0.5 mm and which are connected to each other by a welded joint, the longitudinal edges (22) of the piece of metal sheet (20) being welded continuously by a longitudinal-seam welding machine (50) and the carrying handle lugs (10) welded onto the piece of metal sheet (20) exhibiting fastening lobes (16) of single thickness, the width (W) of which is about 40 % and the length (L) of which is approximately 25 % of the diameter (D) of the circular edge part (13) of the carrying handle lugs (10).
- Process according to Claim 1, characterised in that the fastening lobes (16) of the carrying handle lugs (10) are welded onto the flat pieces of metal sheet (20) by projection welding at a rate of 250 pairs of lobes/minute.
- Process according to Claim 1 or 2, characterised in that, on the piece of metal sheet (20) rolled to form a cylinder, the centre lines of the fastening lobes (16) of two carrying handle lugs (10) are at a distance from each other which corresponds to the diameter of the rolled container body.
- Process according to one of Claims 1 to 3, characterised in that hot-galvanised metal sheets of which the thickness lies between 0.0083" (0.21 mm) and 0.0099" (0.25 mm) are used for producing paint containers having a capacity of 1 gallon (3.78 litres).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89100209T ATE86157T1 (en) | 1988-01-19 | 1989-01-07 | METHOD OF MAKING A CYLINDRICAL METAL CONTAINER. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/145,620 US4839491A (en) | 1987-11-13 | 1988-01-19 | Method for forming a metal cylindrical container |
US145620 | 1988-01-19 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0325123A2 EP0325123A2 (en) | 1989-07-26 |
EP0325123A3 EP0325123A3 (en) | 1990-08-29 |
EP0325123B1 true EP0325123B1 (en) | 1993-03-03 |
Family
ID=22513887
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89100209A Expired - Lifetime EP0325123B1 (en) | 1988-01-19 | 1989-01-07 | Method of making a cylindrical metal container |
Country Status (8)
Country | Link |
---|---|
US (1) | US4839491A (en) |
EP (1) | EP0325123B1 (en) |
AT (1) | ATE86157T1 (en) |
AU (1) | AU608085B2 (en) |
DE (1) | DE58903621D1 (en) |
ES (1) | ES2033623T3 (en) |
NZ (1) | NZ226647A (en) |
ZA (1) | ZA888422B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CH680715A5 (en) * | 1990-01-17 | 1992-10-30 | Elpatronic Ag | |
CH680716A5 (en) * | 1990-01-17 | 1992-10-30 | Elpatronic Ag | |
DE102004053359B4 (en) * | 2004-11-02 | 2006-07-27 | Blechwarenfabrik Limburg Gmbh | Manufacturing procedure for sheet metal container involves labeling of sheet metal plate before molding |
WO2008077139A2 (en) * | 2006-12-19 | 2008-06-26 | Tenoroc, Llc | Device and method for particle separation |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3170590A (en) * | 1962-08-10 | 1965-02-23 | Inland Steel Co | Pail type shipping container |
GB1203758A (en) * | 1966-12-09 | 1970-09-03 | Reads Ltd | Improvements in and relating to the attachment of handles to containers |
US3553419A (en) * | 1967-11-09 | 1971-01-05 | Grotnes Machine Works Inc | Welding machine having provision for precise positioning of two or more workpieces relative to one another during high-speed welding operations |
US3476289A (en) * | 1968-06-28 | 1969-11-04 | Carando Machine Works | Bail-attachment ear for metallic containers |
US3804289A (en) * | 1972-03-17 | 1974-04-16 | Vulcan Plastics Inc | Container and closure |
JPS61206576A (en) * | 1985-03-11 | 1986-09-12 | Nepiyuu Giken:Kk | Welding method of lap joint of can body made of metallic plate and the like |
US4880131A (en) * | 1987-11-13 | 1989-11-14 | Van Dorn Company | Ringless paint container |
-
1988
- 1988-01-19 US US07/145,620 patent/US4839491A/en not_active Expired - Fee Related
- 1988-10-20 NZ NZ226647A patent/NZ226647A/en unknown
- 1988-10-26 AU AU24418/88A patent/AU608085B2/en not_active Ceased
- 1988-11-10 ZA ZA888422A patent/ZA888422B/en unknown
-
1989
- 1989-01-07 DE DE8989100209T patent/DE58903621D1/en not_active Expired - Fee Related
- 1989-01-07 AT AT89100209T patent/ATE86157T1/en not_active IP Right Cessation
- 1989-01-07 EP EP89100209A patent/EP0325123B1/en not_active Expired - Lifetime
- 1989-01-07 ES ES198989100209T patent/ES2033623T3/en not_active Expired - Lifetime
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EP0325123A2 (en) | 1989-07-26 |
ATE86157T1 (en) | 1993-03-15 |
US4839491A (en) | 1989-06-13 |
AU608085B2 (en) | 1991-03-21 |
DE58903621D1 (en) | 1993-04-08 |
ES2033623T1 (en) | 1993-04-01 |
AU2441888A (en) | 1989-07-20 |
NZ226647A (en) | 1991-04-26 |
ES2033623T3 (en) | 1993-07-01 |
EP0325123A3 (en) | 1990-08-29 |
ZA888422B (en) | 1990-07-25 |
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