DK151532B - APPARATUS WITH ROTATING CUTTING ORGANISTS FOR CREATING EXTENSIVE HOLES IN A PROFILED SUBJECT WITH CONSTANT CROSS-CUT FORM - Google Patents
APPARATUS WITH ROTATING CUTTING ORGANISTS FOR CREATING EXTENSIVE HOLES IN A PROFILED SUBJECT WITH CONSTANT CROSS-CUT FORM Download PDFInfo
- Publication number
- DK151532B DK151532B DK040477AA DK40477A DK151532B DK 151532 B DK151532 B DK 151532B DK 040477A A DK040477A A DK 040477AA DK 40477 A DK40477 A DK 40477A DK 151532 B DK151532 B DK 151532B
- Authority
- DK
- Denmark
- Prior art keywords
- knife drum
- profiled
- roller
- knife
- bearings
- Prior art date
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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
- B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
- B21D47/005—Making gratings
-
- 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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/36—Perforating, i.e. punching holes using rotatable work or tool holders
-
- 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
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
- B21D31/04—Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal
-
- 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
- B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Auxiliary Devices For Music (AREA)
- External Artificial Organs (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
i 151532in 151532
Opfindelsen angår et apparat med roterende skæreorganer til frembringelse af rækker af indbyrdes forsatte, i afstand værende aflange huller i forholdsvis tynde materialepartier mellem forholdsvis tykke partier i et profi-5 leret emne med konstant tværsnitsform, hvilket apparat nærmere bestemt omfatter en ramme med et første sæt lejer og en i disse lejer drejeligt lejret anden aksel, der bærer en modtryksvalse, et andet sæt lejer anbragt i rammen, og en i disse lejer drejeligt lejret anden aksel, der bærer 10 en af flere, i det væsentlige cirkelformede knivblade sammensat knivtromle, hvilke to aksler er anbragt parallelt og i afstand fra hinanden, drivorganer koblet til de nævnte to aksler og indrettet til at dreje disse i modsatte retninger, og ledeorganer indrettet til at styre det profile-15 rede emne mellem modtryksvalsen og knivtromlen.BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an apparatus having rotary cutting means for producing rows of spaced apart, elongated holes in relatively thin material portions between relatively thick portions of a profiled article of constant cross-sectional shape, which apparatus further comprises a frame having a first set. a bearing and a second shaft rotatably mounted thereon carrying a backpressure roller, a second set of bearings disposed in the frame, and a second shaft rotatably mounted thereon carrying one of several substantially circular knife blades composed of knife drum, which two shafts are arranged parallel and spaced apart, drive means coupled to said two shafts and arranged to rotate them in opposite directions, and guide means arranged to control the profiled part between the counter pressure roller and the knife drum.
Fra beskrivelsen til USA-patent nr. 3.903.769 kendes et apparat af den omhandlede art, hvor knivtromlen er anbragt over modtryksvalsen, i hvilken sidstnævnte der for de gennemgående sideflanger på emnet findes omløbende noter.From the specification of U.S. Patent No. 3,903,769, there is known an apparatus of the kind in which the knife drum is disposed over the backpressure roller, the latter of which has circular grooves for the through side flanges of the workpiece.
20 Knivtromlen og modtryksvalsen drives med samme periferihastighed, som fortrinsvis er mindre end den hastighed, hvormed emnet fremføres.The knife drum and counterpressure roller are operated at the same peripheral speed, which is preferably less than the speed at which the workpiece is advanced.
Ved dette apparat kan det ske, at de udstansede affaldsstykker fastklemmes mellem knive og emnets vulster henholds-25 vis modtryksvalsen, hvilket medfører driftstop og beskadigelse af knive eller emnet, især når dettes vulster kun har ringe højde.With this apparatus, the punched waste pieces may be clamped between knives and the workpieces of the workpiece, respectively, the counter-pressure roller, which results in operating stops and damage to the knives or workpiece, especially when its workpieces have only a small height.
Det er også kendt at erstatte modtryksvalsen med et støttebord med ribber, hvorpå emnets vulster hviler. Herved 30 løses det førnævnte problem, men kontinuerlig drift er ikke mulig, og for hvert emne skal de udstansede affaldsstykker fjernes.It is also known to replace the backpressure roller with a support table with ribs on which the beads of the work rest. Hereby, the aforementioned problem is solved, but continuous operation is not possible, and for each item the cut pieces of waste must be removed.
Formålet med opfindelsen er at anvise et apparat af den omhandlede art, som tillader kontinuerlig drift med 35 sikker fjernelse af affaldsstykker, og hvor fastklemning af disse stykker er forhindret.The object of the invention is to provide an apparatus of the kind which permits continuous operation with safe removal of waste pieces and where clamping of these pieces is prevented.
Dette opnås ifølge opfindelsen ved den i krav 1 anviste udformning.This is achieved according to the invention in the embodiment of claim 1.
2 1515322 151532
ModtryksbevægeIsens større periferihastighed sikrer en hurtig bortkørsel af affaldsstykkerne, og rummet mellem modtryksvalsen og emnets finner giver tilstrækkelig plads til disse stykker, således at de frit kan fjernes fra skærezonen, 5 Opfindelsen skal i det følgende forklares nærmere i forbin delse med tegningen, hvor fig. 1 viser et apparat ifølge opfindelsen i sidebillede, delvis i snit, fig. 2 samme set fra den ene ende, 10 fig· 3 apparatets knivtromle og modtryksvalse i lodret tværsnit , fig. 4 et perspektivisk udsnit, der viser en del af knivtromlen med tilhørende organer, fig. 5 en anden udførelsesform for en modtryksvalse i aksialt 15 snit, fig. 6 et særskilt knivorgan i sidebillede, fig. 7 en ledeplade i ådebillede, og fig. 8 i perspektiv et udsnit af et færdigt udstanset med tilhørende bortstansede skrotdele.The greater circumferential speed of the counterpressure movement ensures a rapid removal of the waste pieces, and the space between the counterpressure roll and the workpiece fins provides sufficient space for these pieces so that they can be freely removed from the cutting zone. The invention will be explained in more detail in the following with reference to the drawing. 1 shows an apparatus according to the invention in side view, partly in section; FIG. Fig. 2 is a view from one end, Fig. 3, the cutter drum and the counter pressure roller in vertical cross section; 4 is a perspective view showing a portion of the knife drum with associated means; FIG. 5 shows another embodiment of a backpressure roller in axial section, FIG. 6 is a separate side view of a cutter; FIG. 7 shows a guide plate in a vein view, and FIG. 8 is a perspective view of a section of a die cut with associated punched scrap pieces.
20 Det på tegningen viste apparat er beregnet til udstansning af aflange huller 10 i et profileret aflangt emne 12. Dette fremtræder med langsgående tykke materialepartier 13 - i det følgende benævnt vulster - der er forbundet indbyrdes af tyndere materialepartier 11 - i det følgende benævnt finner. De aflange huller 10 25 udstanses i finnerne 11 i indbyrdes afstand og således , at hullerne er forsat for hinanden i rækkerne indbyrdes. Ved udstansning af hullerne fremkommer de i fig. 8 viste aflange skrotdele 14. På tegningen er emnet for overskuelighedens skyld vist med kun fem vulster, men i praksis vil der være tale om væsentlig flere, sædvanligvis 3q fra 10 til 20. Emnet er i øvrigt fremstillet ved ekstrudering af en aluminiumslegering med de til formålet passende egenskaber dvs· med tilstrækkelig blødhed og formbarhed.The apparatus shown in the drawing is intended for punching elongated holes 10 in a profiled elongated blank 12. This appears with longitudinally thick material portions 13 - hereinafter referred to as beads - which are interconnected by thinner material portions 11 - hereinafter referred to as fins. The elongated holes 10 25 are punched in the fins 11 at a distance from each other and so that the holes are set apart in the rows. By punching the holes, they appear in FIG. 8 in the drawing, the subject for the sake of clarity is shown with only five beads, but in practice there will be substantially more, usually 3q from 10 to 20. The article is also made by extruding an aluminum alloy with the purpose suitable properties ie · with sufficient softness and malleability.
Det i fig. 1-3 viste apparat, som i sin helhed er angivet med 18, består af en ramme 19. Denne er forsynet med et første le-35 jesæt 20, der er optaget i lejehuse 21, som er regulerbare i højden 151532 3 ved hjælp af ikke viste stilleskruer. Lejehusene 21 er i øvrigt fastspændt til rammen 19 ved hjælp af sætskruer 22 og bolte 23. Sætskruerne 22 er ført gennem lodret aflange åbninger 24 af hensyn til lejehusenes nævnte indstillelighed i højden. Lejerne 20 danner leje 5 for en aksel 25, der bærer apparatets modtryksvalse 38, og som drives af en elektromotor 2β gennem en kæde 27. Motoren 26 med tilhørende kædedrev er anbragt forskydeligt i kædens retning på et fundament. Dette af hensyn til den nødvendige tilpasning af kæden ved indstilling af lejerne i op- og nedadgående retning. Den lodrette 10 indstillelighed af modtryksakselen 25 gør det muligt at benytte modtryksvalser med forskellige diametre og emner med forskellig tykkelse.The FIG. 1-3, which is indicated in its entirety by 18, consists of a frame 19. This is provided with a first bearing set 20 which is accommodated in bearing housings 21 which are adjustable in height 151532 3 by means of screws not shown. Furthermore, the bearing housings 21 are clamped to the frame 19 by means of set screws 22 and bolts 23. The set screws 22 are passed through vertical elongated openings 24 for the height adjustability of said bearing housings. The bearings 20 form bearing 5 for a shaft 25 which carries the backpressure roller 38 of the apparatus, and which is driven by an electric motor 2β through a chain 27. The motor 26 with associated chain drive is arranged slidably in the direction of the chain on a foundation. This is because of the necessary adjustment of the chain when adjusting the bearings in the up and down direction. The vertical adjustability of the counterpressure shaft 25 makes it possible to use counterpressure rollers of different diameters and different thickness workpieces.
Apparatets knivtromle 44 er anbragt på en aksel 30, der er lejret i lejer 31. Disse er optaget i lejehuse 32, som er indstillelige ved forskydning i vandret retning. Til dette formål er leje-15 husene 32 forsynet med aflange huller 33, hvorigennem boltene 23 passerer. Finindstillingen af lejerne sker ved hjælp af justerskru-er 34, der er forankret til rammen 19.The knife drum 44 of the apparatus is arranged on a shaft 30 housed in bearings 31. These are accommodated in bearing housings 32 which are adjustable by displacement in the horizontal direction. For this purpose, the bearing 15 housings 32 are provided with elongated holes 33 through which the bolts 23 pass. The fine adjustment of the bearings is done by means of adjusting screws 34 which are anchored to the frame 19.
Akselen 30 er via et tandhjulsdrev koblet direkte til en motor 25,som ved lejernes vandrette forskydning er indrettet til at følge 20 med akselen.The shaft 30 is connected via a gear drive directly to a motor 25 which, by the horizontal displacement of the bearings, is arranged to follow 20 with the shaft.
Den vandrette forskydning af akselen 30 og dermed af knivtromlen 44 gør det muligt at forsætte knivtromlen i forhold til modtryksvalsen i vandret plan, således at det i alle tilfælde kan sikres, at knivtromlens skær gennembryder emnet netop ud for modtryksvalsen.The horizontal displacement of the shaft 30 and thus of the knife drum 44 makes it possible to move the knife drum relative to the counterpressure roller in the horizontal plane, so that in all cases it can be ensured that the blade of the knife drum pierces the work just off the counterpressure roller.
25 Af fig. 3-7 fremgår, hvorledes den på akselen 25 lejrede mod tryksvalse 38 er udformet med ringformede, fremstående flanger 39, mellem hvilke der er ringformede riller eller fordybninger 40, Således som det bedst fremgår af fig.3 er flangerne 39 med deres ydersider 41 beregnet til at afstøtte emnets vulster 13 under knivtromlens 44 30 udstansning af hullerne 10 i de mellemliggende finner 11. Flangerne 39 frembringer således det for stanse- eller skæreprocessen nødvendige modtryk mod skæreorganerne.25 From FIG. 3-7 show how it is formed on pressure shaft 38 mounted on shaft 25 with annular protruding flanges 39, between which there are annular grooves or recesses 40. As best seen in Fig. 3, the flanges 39 with their outer sides 41 are calculated. for supporting the beads 13 of the workpiece during the punching of the knife drum 44 by the holes 10 in the intermediate fins 11. The flanges 39 thus produce the back pressure necessary for the punching or cutting process against the cutting means.
De ved hullernes udstansning fremkomne skrotstumper 14 finder plads i mellemrummene mellem finnerne 11 og de ringformede 35 fordybninger 40 i modtryksvalsen. Det har ved praktiske forsøg vist sig, at afstanden mellem bunden i fordybningerne 40 og finnerne 11 , 4 151532 dvs. frigangshøøden i de omtalte mellemrum, i det mindste må svare til halvanden gang finnernes tykkelse, eftersom skrotstumperne 14 sædvanligvis i nogen grad er bøjede eller snoede, i modsætning til de i fig. 8 viste plane og regulære skrotstumper.The scrap pieces 14 formed by the punching holes take place in the spaces between the fins 11 and the annular 35 recesses 40 in the backpressure roll. In practical experiments it has been found that the distance between the bottom of the recesses 40 and the fins 11, 4 The clearance height in the spaces in question must at least correspond to the thickness of the fins, since the scrap pieces 14 are usually slightly bent or twisted, in contrast to those in FIG. 8 and regular scrap pieces.
Ved stanseprocessen presses stumperne 14 opad gennem emnet 12 5 og bevæges med dette bort fra snitzonen, dvs. zonen mellem modtryks- valsen og snittromlen.In the punching process, the pieces 14 are pushed upwardly through the blank 125 and moved therewith away from the cutting zone, ie. the zone between the backpressure roller and the cutter drum.
Fjernelsen af skrotstumperne sker på denne måde meget effektivt uden risiko for, at forvildede stumper skal følge med modtryksvalsen eller knivtromlen rundt og på den måde indføres i snitzonen 10 igen.In this way, the removal of the scrap pieces is done very efficiently without the risk of misaligned pieces having to follow the backpressure roller or knife drum around and in this way reintroduced into the cutting zone 10.
Den i fig. 3 i længdesnit viste firbladede knivtromle 44 er vist i sidebillede i fig. 6. Hvert knivblad er anbragt på et nav 45, der er drejefast indsat på akselen 30. Navene 45 tjener til at holde de enkelte knivblade i korrekt indbyrdes afstand (se fig. 3).The FIG. 3 in longitudinal section, four-blade knife drum 44 is shown in side view in FIG. 6. Each knife blade is arranged on a hub 45 which is pivotally inserted on the shaft 30. The hubs 45 serve to keep the individual blade blades at proper spacing (see Fig. 3).
15 Navene er spændt sammen ved hjælp af et antal på langs gennem navene gående stavformede stagbolte 46.15 The hubs are clamped together by a number of rod-shaped rod bolts 46 passing through the hubs.
Hvert knivblad er perifert opdelt i fire skæreorganer (fig.6), hvis ender parvis er parallelle. Hvis de nævnte ender i modsat fald var rettet radialt i forhold til knivtromlen, ville mellemrummene 20 mellem de enkelte skæreorganer fremtræde med kilefacon med den virkning til følge, at de ikke bortskårne dele af finnerne 11 ville kile sig fast mellem skærene under stanseprocessen. Dette undgås ved, som beskrevet, at gøre skæreenderne parallelle, hvorved de nævnte mellemrum mister deres kilevirkning.Each blade is peripherally divided into four cutting members (Fig. 6), the ends of which are parallel in pairs. Otherwise, if said ends were directed radially with respect to the knife drum, the spaces 20 between the individual cutting means would appear with wedge shape with the effect that the uncut parts of the fins 11 would wedge between the cutters during the punching process. This is avoided by making the cutting ends parallel, as described, whereby the said spaces lose their wedge effect.
25 Knivbladenes sideflader konvergerer radialt indad mod tromlens centrum, således at skærene fremtræder med en vis frigang. Dette forhold er illustreret i fig. 5, som viser en knivtromle med tilhørende modtryksvalse i en udførelsesform, hvor det behandlede profilemne 50 har dybe flanger 51, der optages i tilsvarende recesser 52 30 i modtryksvalsen 38. Skærenes sideflader 53 er vist med den konvergerende form.The side surfaces of the blade blades converge radially inward toward the center of the drum so that the blades appear at a certain clearance. This relationship is illustrated in FIG. 5, which shows a knife drum with associated counterpressure roll in an embodiment in which the treated profile blank 50 has deep flanges 51 which are accommodated in corresponding recesses 52 30 in the counterpressure roller 38. The side faces 53 of the cutters are shown in the converging form.
På trods af den ovenfor omtalte frigang, skærsiderne er udformet med, opstår under stanseprocessen en kraftig friktion mellem knivbladene og emnet, specielt under skærenes returnering fra de 35 η^0Ρ dannede huller, Denne friktion giver anledning til en nedadret- s 151532 tet kraft i emnet umiddelbart efter skærezonen, dvs. ved apparatets udgangsside. Kraften, som har en tendens til at bøje emnet nedad i kurvefacon, kompenseres imidlertid af modtryksvalsen, der, som allerede beskrevet, er placeret lidt foran knivtromlen regnet i frem-5 føringsretningen, og som derfor giver emnet en modsat rettet bøje-spænding.Despite the clearance mentioned above, the cutting sides are formed, during the punching process, a strong friction occurs between the blade blades and the workpiece, especially during the return of the cutters from the holes formed by 35 η ^ 0Ρ. This friction gives rise to a downward force. the workpiece immediately after the cutting zone, ie. at the output side of the device. However, the force which tends to bend the workpiece downwardly in the curve shape is offset by the backpressure roller, which, as already described, is located slightly in front of the knife drum in the forward direction, and therefore gives the workpiece an opposite bending stress.
Til at understøtte emnet efter skærezonen er apparatet udstyret med et antal ledeplader 56, hvoraf en er vist i sidebillede i fig. 7. Ledepladerne, som er anbragt i skærezonen og dennes fortsæt-10 telse, er indskudt mellem de enkelte knivblade 44, idet ledepladerne hver er udformet med en cirkulær udsparing 58, som omslutter navet 45 mellem de to naboknivblade (fig. 4). Under stanseprocessen opstår en kraftig friktion mellem emnet og ledepladerne 56, hvilken friktion søger at dreje ledepladerne i urets retning (fig. 7).To support the workpiece after the cutting zone, the apparatus is provided with a plurality of baffles 56, one of which is shown in side view in FIG. 7. The baffles disposed in the cutting zone and its continuation are interposed between the individual blade blades 44, the baffles each being formed with a circular recess 58 which encloses the hub 45 between the two neighboring blade blades (Fig. 4). During the punching process, strong friction occurs between the workpiece and the baffles 56, which friction seeks to turn the baffles clockwise (Fig. 7).
15 Af denne grund er pladernes ledekanter 57 udformet med en krumningsradius RI, som er mindre end krumningsradius R2 på det sted, hvor emnet kontakter ledepladerne. Ledepladerne vil derfor ved drejning mindske trykket mod emnets underside og derved modvirke klemningen.For this reason, the guide edges 57 of the plates are formed with a radius of curvature R1 which is smaller than the radius of curvature R2 at the point where the workpiece contacts the baffles. The baffles will therefore, when turned, reduce the pressure on the underside of the workpiece, thereby counteracting the clamping.
Knivtromlen 44 med tilhørende ledeplade 56 er delvis nedsænket 20 i et kar 61 med smøremiddel 60 (fig. 4). Dette smøremiddel har dels til formål at smøre glidefladerne mellem navene 45 og ledepladerne 56 og dels at smøre selve knivbladene.The knife drum 44 with associated guide plate 56 is partially submerged 20 in a vessel 61 with lubricant 60 (Fig. 4). The purpose of this lubricant is partly to lubricate the sliding surfaces between the hubs 45 and the baffles 56 and partly to lubricate the blade blades themselves.
Som allerede beskrevet drives modtryksvalsen med større periferihastighed end knivtromlen med det formål at hindre knivbladene 25 i at deformere hullernes ender under knivenes udtræden fra hullerne. Det har imidlertid vist sig, at man indenfor visse grænser kan regulere hullernes længde ved regulering af den relative hastighed mellem knivtromlen og modtryksvalsen.As already described, the backpressure roller is operated at a greater peripheral speed than the knife drum for the purpose of preventing the blade blades 25 from deforming the ends of the holes during the exit of the blades from the holes. However, it has been found that, within certain limits, the length of the holes can be adjusted by regulating the relative speed between the knife drum and the counter pressure roller.
Det beskrevne apparat er af forholdsvis enkel konstruktion, 30 blandt andet som følge af de separate drivmidler, som knivtromlen og modtryksvalsen er udstyret med. De i profilemnet frembragte huller fremtræder med et rent snit, blandt andet som følge af knivenes konvergerende sideflader og parvis parallelle endeflader. Når afstanden mellem de enkelte huller i en række er forholdsvis lille, 35 har det endvidere vist sig, at knivtromlen i nogen grad fastholder emnet i mellemrummet mellem de enkelte knivorganer på en knivplade og på denne måde frembringer en indexerende effekt.Denne effekt kan udnyttes til at sikre en konstant hullængde.The apparatus described is of relatively simple construction, inter alia due to the separate propellants with which the knife drum and the counter pressure roller are equipped. The holes formed in the profile blank appear in a clean cut, partly as a result of the converging side surfaces of the blades and pairs of parallel end faces. Furthermore, when the distance between the individual holes in a row is relatively small, it has been found that the knife drum holds to some extent the subject in the space between the individual knife means on a knife plate and in this way produces an indexing effect. to ensure a constant hole length.
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPC468076 | 1976-02-02 | ||
| AUPC468076 | 1976-02-02 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK40477A DK40477A (en) | 1977-08-03 |
| DK151532B true DK151532B (en) | 1987-12-14 |
| DK151532C DK151532C (en) | 1988-06-13 |
Family
ID=3766514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK040477A DK151532C (en) | 1976-02-02 | 1977-02-01 | APPARATUS WITH ROTATING CUTTING ORGANISTS FOR CREATING EXTENSIVE HOLES IN A PROFILED SUBJECT WITH CONSTANT CROSS-CUT FORM |
Country Status (5)
| Country | Link |
|---|---|
| AT (1) | AT363766B (en) |
| DK (1) | DK151532C (en) |
| FI (1) | FI62479C (en) |
| NO (1) | NO146894C (en) |
| SE (1) | SE418371B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE823694C (en) * | 1948-10-02 | 1951-12-06 | Bosch Gmbh Robert | Punching tool |
| US3858469A (en) * | 1972-09-07 | 1975-01-07 | Johns Manville | Method for cutting holes in roofing sheet material |
| US3903769A (en) * | 1972-07-17 | 1975-09-09 | Comalco J & S Pty | Means and method of slotting strip metal |
-
1977
- 1977-01-12 FI FI770085A patent/FI62479C/en not_active IP Right Cessation
- 1977-01-18 SE SE7700485A patent/SE418371B/en not_active IP Right Cessation
- 1977-01-24 AT AT0042177A patent/AT363766B/en not_active IP Right Cessation
- 1977-02-01 DK DK040477A patent/DK151532C/en not_active IP Right Cessation
- 1977-02-01 NO NO77770326A patent/NO146894C/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE823694C (en) * | 1948-10-02 | 1951-12-06 | Bosch Gmbh Robert | Punching tool |
| US3903769A (en) * | 1972-07-17 | 1975-09-09 | Comalco J & S Pty | Means and method of slotting strip metal |
| US3858469A (en) * | 1972-09-07 | 1975-01-07 | Johns Manville | Method for cutting holes in roofing sheet material |
Also Published As
| Publication number | Publication date |
|---|---|
| SE7700485L (en) | 1977-08-03 |
| DK40477A (en) | 1977-08-03 |
| DK151532C (en) | 1988-06-13 |
| AT363766B (en) | 1981-08-25 |
| NO146894C (en) | 1982-12-29 |
| FI62479B (en) | 1982-09-30 |
| SE418371B (en) | 1981-05-25 |
| NO146894B (en) | 1982-09-20 |
| FI62479C (en) | 1983-01-10 |
| NO770326L (en) | 1977-08-03 |
| FI770085A (en) | 1977-08-03 |
| ATA42177A (en) | 1981-01-15 |
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| Date | Code | Title | Description |
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| PBP | Patent lapsed |