DE3544414A1 - Sealing roll - Google Patents
Sealing rollInfo
- Publication number
- DE3544414A1 DE3544414A1 DE19853544414 DE3544414A DE3544414A1 DE 3544414 A1 DE3544414 A1 DE 3544414A1 DE 19853544414 DE19853544414 DE 19853544414 DE 3544414 A DE3544414 A DE 3544414A DE 3544414 A1 DE3544414 A1 DE 3544414A1
- Authority
- DE
- Germany
- Prior art keywords
- temperature
- sealing
- disc
- sealing roll
- sampling
- 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.)
- Withdrawn
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 39
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 4
- 239000002985 plastic film Substances 0.000 claims abstract description 3
- 229920006255 plastic film Polymers 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000005070 sampling Methods 0.000 abstract 3
- 238000009529 body temperature measurement Methods 0.000 abstract 1
- 239000004020 conductor Substances 0.000 abstract 1
- 229910001369 Brass Inorganic materials 0.000 description 4
- 239000010951 brass Substances 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
- 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
- B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- 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
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/431—Joining the articles to themselves
- B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
- B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
- B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
- B29C66/91231—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the joining tool
-
- 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
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
- B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
- B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
- B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
- B29C66/91651—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating
- B29C66/91655—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating by controlling or regulating the current intensity
-
- 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
- B29C66/90—Measuring or controlling the joining process
- B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
- B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Package Closures (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
Description
SiegelrolleSealing roll
Die Erfindung betrifft eine Siegelrolle mit Temperaturabtastung zum Verbinden von Plastfolienbahnen, bei welcher die Temperatur mittels eines in einen Schleifkörper eingelassenen Temperaturfühlers abgetastet und einer Temperaturregeleinrichtung zugeführt wird.The invention relates to a sealing roll with temperature sensing for Joining of plastic film webs, at which the temperature by means of a in a Abrasive embedded temperature sensor scanned and a temperature control device is fed.
Es ist allgemein bekannt, die Temperatur mittels I<ohlebürsten, die an geeigneter Stelle am Umfang schleifen, abzutasten. In die Kohlebürste ist ein Meßfühler eingelassen, der die Temperatur aufnimmt und weiterleitet (DD-WP 69 953).It is well known to measure the temperature by means of I <ohbrushes, which grind at a suitable point on the circumference. In the carbon brush is a sensor is inserted, which records the temperature and transmits it (DD-WP 69 953).
Hierbei entstehen aber durch die auftretende Reibungswärme erhebliche und zudem noch schwankende Meßfehler, die für Siegelrollen nicht vertretbar sind, da dann keine einwandfreien Siegelnähte entstehen. Um diese Fehler auszuschließen, wurde vorgeschlagen, seitlich in den Siegelwalzenkörper eine Ringnut einzudrehen, in die der Meßfühler eingebracht wird, um somit eine berührungslose Abtastung zu erreichen (DE-AS 20 48 680) Diese Lösung ist nur für relativ breite Siegelwalzen für Flächensiegelung anwendbar, da eine hinreichende Nuttiefe zur sicheren Abtastung erforderlich ist. Zudem besteht die Gefahr, daß der frei eintauchende Meßfühler die Nutwandungen berührt, etwa durch Erschütterungen, was zu Meßschwankungen führt. Für schmale Siegelrollen zur Längsnahterzeugung ist die Lösung demnach nicht geeignet.In this case, however, considerable frictional heat occurs and also fluctuating measurement errors that are not justifiable for sealing rolls, since then there are no perfect sealing seams. To rule out these errors, it was suggested to screw an annular groove laterally into the sealing roller body, into which the sensor is introduced, so as to enable contactless scanning achieve (DE-AS 20 48 680) This solution is only for relatively wide sealing rollers Can be used for surface sealing, as the groove depth is sufficient for reliable scanning is required. In addition, there is the risk that the freely immersed sensor touches the groove walls, for example by vibrations, which leads to measurement fluctuations. The solution is therefore not suitable for narrow sealing rolls for producing longitudinal seams.
Die Erfindung bezweckt, Meßschwankungen im Abtastverlauf an Längssiegelrollen möglichst klein zu halten.The invention aims to measure fluctuations in the scanning process on longitudinal sealing rollers to keep it as small as possible.
Es besteht die Aufgabe, die Temperatur über eine reibungsarme Kontaktabtastung zu ermitteln und diese einer Regeleinrichtung zuzuleiten.The task is to measure the temperature via a low-friction contact scanning to determine and to forward this to a control device.
Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß die Rückseite der Siegelrolle mit einer Scheibe aus gut wärmeleitbarem Material belegt ist und daß der mit dem Temperaturmeßfühler ausgestattete Schleifkörper im Rotationszentrum der Scheibe angeordnet ist.According to the invention the object is achieved in that the back the sealing roll is covered with a disc made of a material that is good at conducting heat and that the grinding wheel equipped with the temperature sensor is in the center of rotation the disc is arranged.
Der Schleifkörper besteht aus Schleifkohle und ist mittels Federkraft an die Scheibe angedrückt.The grinding wheel is made of carbon and is spring-loaded pressed against the pane.
Die Rückseite der Siegelrolle ist ringförmig freigedreht und die Scheibe überdeckt den gesamten Durchmesser der Siegelrolle.The back of the sealing roll is turned free in a ring and the disc covers the entire diameter of the sealing roll.
Durch die Anordnung des Schleifkörpers in das Rotationszentrum der Siegelrolle entsteht nur eine geringe Reibung, die bis zum Rotationemittelpunkt bis auf Null abnimmt. Es entsteht kaum Reibungewärme. Auftretende Schwankungen, die bei üblicher Abtastung am Umfang auftreten, sind nicht mehr meßbar. Das vorhandene Temperaturgefälle vom Meßpunkt bis zur wirksamen Siegelfläche hat zwar Unterschiede zwischen am Regler angezeigter und tatsächlicher Temperatur zur Folge, beeinflußt aber die Reproduzierbarkeit der Temperatur bei einer bestimmten Reglereinstellung und damit die Bildung einer einwandfreien Längsnaht nicht.By arranging the grinding wheel in the center of rotation of the The sealing roller creates only a low level of friction up to the center of rotation decreases to zero. There is hardly any frictional heat. Occurring fluctuations, which occur with normal scanning on the circumference can no longer be measured. The existing The temperature gradient from the measuring point to the effective sealing surface does have differences between the temperature displayed on the controller and the actual temperature but the reproducibility of the temperature at a certain controller setting and thus the formation of a perfect longitudinal seam is not possible.
Die Erfindung soll an einem Ausführungsbeispiel erläutert werden. In der zugehörigen Zeichnung ist eine Ausführungsform mit zwei zusammenwirkenden Siegelrollen gezeigt, bei der nur an einer die Temperatur gemessen wird.The invention is to be explained using an exemplary embodiment. In the accompanying drawing is an embodiment with two cooperating Sealing rolls shown in which the temperature is measured on only one.
die gesehen werden kann, besteht die Längseiegeleinrichtung aus einer unteren Siegelrolle 1 und einer oberen Siegelrolle 2.which can be seen, the longitudinal sealing device consists of a lower sealing roller 1 and an upper sealing roller 2.
Die Temperaturabtestung erfolgt nur an der oberen Siegelrolle.The temperature testing is only carried out on the upper sealing roller.
Hierzu ist an der ,Rücl<seite der Siegelrolle 2 eine Messing -platte 3 angeschraubt. Der Rücken der Siegelrolle 2 ist scheibenförmig freigedreht, so daß die Messingplatte 3 nur ringförmig am äußeren Rollenbereich satt anliegt. Im Drehzentrum der Diegelrolle 2 befindet sich ein zylindrischer Schleifkörper 4, der mittels einer Feder 5 an die Messingplatte 3 angedrückt wird. Der 8chleifkör,oer 4 ist in einem Schutzrohr 6 geführt und auch die Feder 5 stützt sich in dem Schutzrohr 6 ab. Des Schutzrohr ist durch die als Hohlwelle 7 ausgebildete Siegelrollenwelle hindurchgeführt. Durch dieses Schutzrohr ist auch der in den Schleifkörper 4 eingebettete Temperaturfühler 8 mittels eines Keramikrohres 9 hindurchgeführt. Über eine Übertragungsleitung ist der Temperaturfühier 8 mit einer neneleinrichtung verbunden.For this purpose, there is a brass plate on the back of the sealing roll 2 3 screwed on. The back of the sealing roll 2 is rotated free in the form of a disk, see above that the brass plate 3 rests in a ring-shaped manner on the outer roller area. in the The center of rotation of Diegelrolle 2 is a cylindrical grinding wheel 4, the is pressed against the brass plate 3 by means of a spring 5. The grinding tool, oer 4 is guided in a protective tube 6 and the spring 5 is also supported in the protective tube 6 from. The protective tube is through the sealing roller shaft designed as a hollow shaft 7 passed through. The tube embedded in the grinding wheel 4 is also embedded through this protective tube Temperature sensor 8 passed through a ceramic tube 9. Via a transmission line the temperature sensor 8 is connected to a device.
Die Stromzufuhr zu dem Ringheizkörper 10 erfolgt in bekannter Weise über Cjchleif ringe 11. Die untere Siegelrolle 1 kann gegebenenfalls in gleicher cise ausgeführt sein.The power supply to the ring heater 10 takes place in a known manner Via grinding rings 11. The lower sealing roller 1 can optionally be used in the same be executed cise.
Am Ringheizkörper 10 liegt ständig ein gleichbleibender Grundstrom an, mittels dem die notwendige Siegeltemperatur erzeugt wird. Diese Siegeltemperatur wird vom Grundkörper 12 der Siegelrolle 2 an die Messingplatte 3 übertragen, in deren Mittelpunkt von dem Schleifkörper 4 abgetastet und von dem darin eingebetteten Temperaturfühler 8 an die Regeleinrichtung übertragen.At the ring heater 10 there is always a constant basic current by means of which the necessary sealing temperature is generated. This sealing temperature is transferred from the base body 12 of the sealing roll 2 to the brass plate 3, in the center of which is scanned by the grinding wheel 4 and by the one embedded therein Transfer temperature sensor 8 to the control device.
Bei Betriebsbeginn werden die beiden Siegeirollen 1; 2 über bekannte Mittel zusammengesteuert. Die jetzt andie Folienbahn 13 abgegebene Wärmemenge wirkt sich zunächst als Tempereturabfall in dem Grundkörper 12 der Siegelrolle 2 zur Wie Messungen ergeben haben, ist dieser Temperaturabfall nach etwa drei Sekunden an der Abtaststelle spürbar. Dieser Temperaturabfall bewirkt, in Abhängigkeit der Größe der Differenz zur Solltemperatur, die Zuschaltung einer höheren Stromstärke zum Ringheizkörper 10 durch die Regeleinrichtung. Die gesamte Zeit vom Beginn des Temperaturabfalles bis zum liedererreichen der Solltemperatur beträgt je nach entnommener lärmemenge 5 bis 10 Sekunden, wobei eine maximale Temperaturdifferenz von 3 K eintritt, welche Differenzen für Siegelungen bedeutungslos sind.At the start of operations, the two winning rolls 1; 2 over known Means steered together. The amount of heat now given off to the film web 13 acts initially as a drop in temperature in the base body 12 of the sealing roll 2 to how Measurements have shown that this temperature drop occurs after about three seconds the scanning point noticeably. This temperature drop causes, depending on the size the difference to the target temperature, the connection of a higher amperage to the Ring heater 10 by the control device. The entire time from the beginning of the temperature drop until the target temperature is reached, depending on the amount of noise extracted 5 to 10 seconds, with a maximum temperature difference of 3 K occurring, which Differences are meaningless to seals.
Claims (3)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DD85272940A DD248483A3 (en) | 1985-02-01 | 1985-02-01 | SEAL ROLL |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3544414A1 true DE3544414A1 (en) | 1986-08-07 |
Family
ID=5565110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19853544414 Withdrawn DE3544414A1 (en) | 1985-02-01 | 1985-12-16 | Sealing roll |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH671361A5 (en) |
| DD (1) | DD248483A3 (en) |
| DE (1) | DE3544414A1 (en) |
| IT (1) | IT1208451B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4022816A1 (en) * | 1990-07-18 | 1992-01-23 | Cyklop Gmbh | Welding device for plastic film packs - has conveyor to remove pack from film wrapping machine and applies to film edges friction-driven roller fitted with cutter and heated rim |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937487B (en) * | 2012-10-19 | 2014-07-23 | 哈尔滨盖格电子工程有限公司 | Intelligent fault detection and alarm system for collecting ring of carbon brushes of large generator |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2647444A1 (en) * | 1976-10-21 | 1978-04-27 | Bosch Siemens Hausgeraete | WELDING DEVICE, IN PARTICULAR FOR SEALING AT LEAST TWO OVERLAYING FILMS MADE OF THERMOPLASTIC PLASTIC |
-
1985
- 1985-02-01 DD DD85272940A patent/DD248483A3/en unknown
- 1985-12-16 DE DE19853544414 patent/DE3544414A1/en not_active Withdrawn
-
1986
- 1986-01-10 CH CH74/86A patent/CH671361A5/de not_active IP Right Cessation
- 1986-01-30 IT IT4760086A patent/IT1208451B/en active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2647444A1 (en) * | 1976-10-21 | 1978-04-27 | Bosch Siemens Hausgeraete | WELDING DEVICE, IN PARTICULAR FOR SEALING AT LEAST TWO OVERLAYING FILMS MADE OF THERMOPLASTIC PLASTIC |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4022816A1 (en) * | 1990-07-18 | 1992-01-23 | Cyklop Gmbh | Welding device for plastic film packs - has conveyor to remove pack from film wrapping machine and applies to film edges friction-driven roller fitted with cutter and heated rim |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1208451B (en) | 1989-06-12 |
| IT8647600A0 (en) | 1986-01-30 |
| CH671361A5 (en) | 1989-08-31 |
| DD248483A3 (en) | 1987-08-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| 8130 | Withdrawal |