CH362216A - Heated welding roller for welding plastic foils - Google Patents

Heated welding roller for welding plastic foils

Info

Publication number
CH362216A
CH362216A CH362216DA CH362216A CH 362216 A CH362216 A CH 362216A CH 362216D A CH362216D A CH 362216DA CH 362216 A CH362216 A CH 362216A
Authority
CH
Switzerland
Prior art keywords
welding
roller
welding roller
heated
recess
Prior art date
Application number
Other languages
German (de)
Inventor
Heinzer Hans
Original Assignee
Sig Schweiz Industrieges
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 Sig Schweiz Industrieges filed Critical Sig Schweiz Industrieges
Publication of CH362216A publication Critical patent/CH362216A/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/245—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool the heat transfer being achieved contactless, e.g. by radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81433—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83417—Roller, cylinder or drum types said rollers, cylinders or drums being hollow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Package Closures (AREA)

Description

       

  
 



  Beheizte Schweissrolle zum Verschweissen von Kunststoff-Folien
Die Erfindung betrifft eine beheizte Schweissrolle zum kontinuierlichen Verschweissen von Kunststoff Folien, thermolackierten Materialien und dergleichen.



   Solche beheizte Schweissrollen sind in der Verpackungsmaschinenindustrie bereits bekannt. Sie dienen zur kontinuierlichen Herstellung von dichten Schweissnähten an Packungen der genannten Art. Die bisher bekannt gewordenen Schweissrollen enthielten eine rotierende elektrische Heizwicklung, welche für die Stromzuführung die Verwendung von Schleifringen und Bürsten notwendig machte, was oft zu Störungen infolge Verschmutzung und Verschleiss dieser Teile und damit zu unerwünschten Betriebsunterbrüchen führte.



   Bei der Schweissrolle nach der vorliegenden Erfindung sind diese Mängel behoben. Die Wärmezufuhr erfolgt durch einen in einer Ausnehmung der rotierbaren Rolle angeordneten, ruhenden, elektrischen Infrarot-Strahlkörper. Die Stromzufuhr benötigt dadurch keinerlei bewegliche und aufeinandergleitende Teile, und die Schweissrolle bedarf keiner Wartung.



   In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt.



   Auf einer von der nicht   dargestellten Verpackungs-    maschine angetriebenen, rotierenden Welle 1 ist eine Schweissrolle 2 befestigt, die an ihrem Umfang eine gerillte Oberfläche 3 aufweist, wie dies für die auszuführende Arbeit erforderlich ist. Die Oberfläche 3 arbeitet mit der entsprechenden Oberfläche einer zweiten, nicht gezeichneten Gegenrolle zusammen, und das Verschweissen der Folien erfolgt auf bekannte Weise dadurch, dass diese zwischen den Oberflächen 3 durchgeführt werden. Die Rolle 2 weist eine ringförmige, durch die Wände 5 begrenzte Ausnehmung auf.

   In dieser ist ein an sich bekannter, ringförmiger, elektrisch beheizter Infrarot-Strahlkörper 6 angeordnet, der die Rotation der Rolle nicht mitmacht, sondern auf nicht näher dargestellte Weise mittels der metallischen Stromzuführungsleitung   6' an    einem ruhenden Teil der Verpackungsmaschine befestigt ist.



  Der   Strahlkörper    6 ist über die Leitungen   6' und    7 an einer elektrischen Stromquelle angeschlossen. Die vom Strahlkörper 6 erzeugte Wärme wird durch Strahlung an die Wände 5 der Schweissrolle übertragen. Diese sind zur Verbesserung der Wärmeaufnahmefähigkeit zweckmässigerweise leicht aufgerauht und geschwärzt. Zur Verminderung von Strahlungsverlusten ist die Öffnung der Ausnehmung durch einen ringförmigen Metallspiegel 8 abgedeckt, der die auftreffende Infrarotstrahlung zurückspiegelt. Dieser Metallspiegel 8 ist beispielsweise an der Stromzuführungsleitung 6'befestigt. Um Wärmeverluste der Schweissrolle durch Abstrahlung nach Möglichkeit zu vermeiden, ist die äussere Stirnfläche 4 der Schweissrolle zweckmässig poliert ausgeführt.  



   PATENTANSPRUCH
Beheizte Schweissrolle zum kontinuierlichen Verschweissen von Kunststoff-Folien und thermolackierten Materialien, dadurch gekennzeichnet, dass die Wärmezufuhr durch einen, in einer Ausnehmung der rotierbaren Rolle angeordneten, ruhenden, elektrischen Infrarot-Strahlkörper (6) erfolgt.



   UNTERANSPRÜCHE
1. Beheizte Schweissrolle nach Patentanspruch, dadurch gekennzeichnet, dass die Innenwände (5) der Ausnehmung zwecks guter   Wärmeaufnahmefählgkeit    aufgerauht und geschwärzt sind. 

**WARNUNG** Ende DESC Feld konnte Anfang CLMS uberlappen**.



   



  
 



  Heated welding roller for welding plastic foils
The invention relates to a heated welding roller for the continuous welding of plastic foils, thermo-lacquered materials and the like.



   Such heated welding rollers are already known in the packaging machine industry. They are used for the continuous production of tight welds on packs of the type mentioned. The previously known welding rollers contained a rotating electrical heating coil, which made the use of slip rings and brushes necessary for the power supply, which often leads to disruptions due to contamination and wear of these parts and thus led to undesirable business interruptions.



   With the welding roller according to the present invention, these deficiencies are eliminated. The heat is supplied by a stationary, electric infrared radiator arranged in a recess in the rotatable roller. As a result, the power supply does not require any moving parts that slide on one another, and the welding roller does not require any maintenance.



   An exemplary embodiment of the invention is shown in the drawing.



   A welding roller 2 is attached to a rotating shaft 1 driven by the packaging machine, not shown, which has a grooved surface 3 on its circumference, as is necessary for the work to be performed. The surface 3 works together with the corresponding surface of a second, not shown, counter-roller, and the foils are welded in a known manner in that they are carried out between the surfaces 3. The roller 2 has an annular recess delimited by the walls 5.

   In this a known, ring-shaped, electrically heated infrared radiator 6 is arranged, which does not take part in the rotation of the roll, but is attached to a stationary part of the packaging machine in a manner not shown by means of the metallic power supply line 6 '.



  The radiator 6 is connected to an electrical power source via the lines 6 'and 7. The heat generated by the radiant body 6 is transmitted to the walls 5 of the welding roller by radiation. These are appropriately slightly roughened and blackened to improve the heat absorption capacity. To reduce radiation losses, the opening of the recess is covered by an annular metal mirror 8, which reflects back the incident infrared radiation. This metal mirror 8 is, for example, attached to the power supply line 6 ′. In order to avoid heat losses from the welding roller through radiation as far as possible, the outer end face 4 of the welding roller is expediently made polished.



   PATENT CLAIM
Heated welding roller for the continuous welding of plastic foils and thermo-lacquered materials, characterized in that the heat is supplied through a stationary, electric infrared radiator (6) arranged in a recess of the rotatable roller.



   SUBCLAIMS
1. Heated welding roller according to claim, characterized in that the inner walls (5) of the recess are roughened and blackened for the purpose of good heat absorption.

** WARNING ** End of DESC field could overlap beginning of CLMS **.

Claims (1)

**WARNUNG** Anfang CLMS Feld konnte Ende DESC uberlappen **. ** WARNING ** Beginning of CLMS field could overlap end of DESC **. Beheizte Schweissrolle zum Verschweissen von Kunststoff-Folien Die Erfindung betrifft eine beheizte Schweissrolle zum kontinuierlichen Verschweissen von Kunststoff Folien, thermolackierten Materialien und dergleichen. Heated welding roller for welding plastic foils The invention relates to a heated welding roller for the continuous welding of plastic foils, thermo-lacquered materials and the like. Solche beheizte Schweissrollen sind in der Verpackungsmaschinenindustrie bereits bekannt. Sie dienen zur kontinuierlichen Herstellung von dichten Schweissnähten an Packungen der genannten Art. Die bisher bekannt gewordenen Schweissrollen enthielten eine rotierende elektrische Heizwicklung, welche für die Stromzuführung die Verwendung von Schleifringen und Bürsten notwendig machte, was oft zu Störungen infolge Verschmutzung und Verschleiss dieser Teile und damit zu unerwünschten Betriebsunterbrüchen führte. Such heated welding rollers are already known in the packaging machine industry. They are used for the continuous production of tight welds on packs of the type mentioned. The previously known welding rollers contained a rotating electrical heating coil, which made the use of slip rings and brushes necessary for the power supply, which often leads to disruptions due to contamination and wear of these parts and thus led to undesirable business interruptions. Bei der Schweissrolle nach der vorliegenden Erfindung sind diese Mängel behoben. Die Wärmezufuhr erfolgt durch einen in einer Ausnehmung der rotierbaren Rolle angeordneten, ruhenden, elektrischen Infrarot-Strahlkörper. Die Stromzufuhr benötigt dadurch keinerlei bewegliche und aufeinandergleitende Teile, und die Schweissrolle bedarf keiner Wartung. With the welding roller according to the present invention, these deficiencies are eliminated. The heat is supplied by a stationary, electric infrared radiator arranged in a recess of the rotatable roller. As a result, the power supply does not require any moving parts that slide on one another, and the welding roller does not require any maintenance. In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. An exemplary embodiment of the invention is shown in the drawing. Auf einer von der nicht dargestellten Verpackungs- maschine angetriebenen, rotierenden Welle 1 ist eine Schweissrolle 2 befestigt, die an ihrem Umfang eine gerillte Oberfläche 3 aufweist, wie dies für die auszuführende Arbeit erforderlich ist. Die Oberfläche 3 arbeitet mit der entsprechenden Oberfläche einer zweiten, nicht gezeichneten Gegenrolle zusammen, und das Verschweissen der Folien erfolgt auf bekannte Weise dadurch, dass diese zwischen den Oberflächen 3 durchgeführt werden. Die Rolle 2 weist eine ringförmige, durch die Wände 5 begrenzte Ausnehmung auf. A welding roller 2 is attached to a rotating shaft 1 driven by the packaging machine, not shown, which has a grooved surface 3 on its circumference, as is necessary for the work to be performed. The surface 3 works together with the corresponding surface of a second, not shown counter-roller, and the foils are welded in a known manner in that they are carried out between the surfaces 3. The roller 2 has an annular recess delimited by the walls 5. In dieser ist ein an sich bekannter, ringförmiger, elektrisch beheizter Infrarot-Strahlkörper 6 angeordnet, der die Rotation der Rolle nicht mitmacht, sondern auf nicht näher dargestellte Weise mittels der metallischen Stromzuführungsleitung 6' an einem ruhenden Teil der Verpackungsmaschine befestigt ist. In this a known, ring-shaped, electrically heated infrared radiator 6 is arranged, which does not take part in the rotation of the roll, but is attached to a stationary part of the packaging machine in a manner not shown by means of the metallic power supply line 6 '. Der Strahlkörper 6 ist über die Leitungen 6' und 7 an einer elektrischen Stromquelle angeschlossen. Die vom Strahlkörper 6 erzeugte Wärme wird durch Strahlung an die Wände 5 der Schweissrolle übertragen. Diese sind zur Verbesserung der Wärmeaufnahmefähigkeit zweckmässigerweise leicht aufgerauht und geschwärzt. Zur Verminderung von Strahlungsverlusten ist die Öffnung der Ausnehmung durch einen ringförmigen Metallspiegel 8 abgedeckt, der die auftreffende Infrarotstrahlung zurückspiegelt. Dieser Metallspiegel 8 ist beispielsweise an der Stromzuführungsleitung 6'befestigt. Um Wärmeverluste der Schweissrolle durch Abstrahlung nach Möglichkeit zu vermeiden, ist die äussere Stirnfläche 4 der Schweissrolle zweckmässig poliert ausgeführt. The radiator 6 is connected to an electrical power source via the lines 6 'and 7. The heat generated by the radiant body 6 is transmitted to the walls 5 of the welding roller by radiation. These are appropriately slightly roughened and blackened to improve the heat absorption capacity. To reduce radiation losses, the opening of the recess is covered by an annular metal mirror 8, which reflects back the incident infrared radiation. This metal mirror 8 is, for example, attached to the power supply line 6 ′. In order to avoid heat losses from the welding roller through radiation as far as possible, the outer end face 4 of the welding roller is expediently made polished. PATENTANSPRUCH Beheizte Schweissrolle zum kontinuierlichen Verschweissen von Kunststoff-Folien und thermolackierten Materialien, dadurch gekennzeichnet, dass die Wärmezufuhr durch einen, in einer Ausnehmung der rotierbaren Rolle angeordneten, ruhenden, elektrischen Infrarot-Strahlkörper (6) erfolgt. PATENT CLAIM Heated welding roller for the continuous welding of plastic foils and thermo-lacquered materials, characterized in that the heat is supplied through a stationary, electric infrared radiator (6) arranged in a recess of the rotatable roller. UNTERANSPRÜCHE 1. Beheizte Schweissrolle nach Patentanspruch, dadurch gekennzeichnet, dass die Innenwände (5) der Ausnehmung zwecks guter Wärmeaufnahmefählgkeit aufgerauht und geschwärzt sind. SUBCLAIMS 1. Heated welding roller according to claim, characterized in that the inner walls (5) of the recess are roughened and blackened for the purpose of good heat absorption. 2. Beheizte Schweissrolle nach Patentanspruch, dadurch gekennzeichnet, dass die äussere Stirnfläche (4) der Schweissrolle zwecks geringer Wärmeabstrahlung poliert ist. 2. Heated welding roller according to claim, characterized in that the outer end face (4) of the welding roller is polished for the purpose of low heat radiation. 3. Beheizte Schweissrolle nach Patentanspruch, dadurch gekennzeichnet, dass die Öffnung der Ausnehmung durch einen Metallspiegel (8) abgedeckt ist. 3. Heated welding roller according to claim, characterized in that the opening of the recess is covered by a metal mirror (8).
CH362216D 1958-11-05 1958-11-05 Heated welding roller for welding plastic foils CH362216A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH362216T 1958-11-05

Publications (1)

Publication Number Publication Date
CH362216A true CH362216A (en) 1962-05-31

Family

ID=4513203

Family Applications (1)

Application Number Title Priority Date Filing Date
CH362216D CH362216A (en) 1958-11-05 1958-11-05 Heated welding roller for welding plastic foils

Country Status (1)

Country Link
CH (1) CH362216A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006084805A1 (en) * 2005-02-10 2006-08-17 A.W.A.X. Progettazione E Ricerca S.R.L. Hot roller device in particular for heat-sealing thermoplastic materials
WO2007009936A2 (en) * 2005-07-20 2007-01-25 S.I.M.A. Società Industrie Meccaniche Affini A R.L. Cylinder for driving and heating strips of plastic material during production

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006084805A1 (en) * 2005-02-10 2006-08-17 A.W.A.X. Progettazione E Ricerca S.R.L. Hot roller device in particular for heat-sealing thermoplastic materials
WO2007009936A2 (en) * 2005-07-20 2007-01-25 S.I.M.A. Società Industrie Meccaniche Affini A R.L. Cylinder for driving and heating strips of plastic material during production
WO2007009936A3 (en) * 2005-07-20 2007-05-03 S I M A Societa Ind Meccaniche Cylinder for driving and heating strips of plastic material during production

Similar Documents

Publication Publication Date Title
GB1239315A (en)
US2078161A (en) Gearing
CH362216A (en) Heated welding roller for welding plastic foils
DE69106145T2 (en) COOKING HOB WITH INDUCTION HEATING.
US3046382A (en) Spiral tube mill
DE3033689A1 (en) Electrically heated roller - has heating mats between inner tube and outer roller mantle tube
DE1779656B1 (en) DEVICE FOR WELDING THERMOPLASTIC FILMS
DE1781579U (en) HEATED WELDING ROLLER.
DE970000C (en) Device for electro-inductive heating of workpieces
DE568283C (en) Electrically heated metallizing, painting, Bruenier and Blaeu machine
DE6911276U (en) TEMPERATURE MEASURING DEVICE FOR HEATED ROLLERS
DE902065C (en) Induction heating device for heat treatment of metallic workpieces
DE6940141U (en) DEVICE FOR THE CONTINUOUS PRODUCTION OF WELDING OR HEAT SEALING NAENTS ON PACKAGING FILMS
DE355755C (en) Device to avoid short-circuiting of double-pole electrode rollers for pipe welding machines
DE1151724B (en) Rotating drying cylinder with electric heating for paper webs or the like.
DE2611171C2 (en) Device with control of the welding current in the case of an arc welding torch moved along a weld seam
DE631618C (en) Hollow heating roller composed of parts for heating webs of paper, cardboard, textile material or the like, primarily intended to facilitate the rolling together of packs of pull fuses
DE1953696U (en) FACILITY FOR HEAT TREATMENT OF SYNTHETIC FIBERS.
DE2501050A1 (en) PROCESS FOR SHAPING METALLIC MATERIAL
DE579984C (en) Storage of grinding spindles, especially for thread grinding wheels
DE896972C (en) Electrically heated rotating roller
DE686107C (en) Machine for crimping cables with a lead or lead alloy jacket
US858507A (en) Process of electric welding.
DE1202644B (en) Screw piston for screw pumps with at least two interlocking screw pistons
DE750194C (en) Process for the production of sintered molded bodies from hard metal