EP 1099794 A1 20010516 - Process and apparatus for threading a web tail
Title (en)
Process and apparatus for threading a web tail
Title (de)
Vorrichtung und Verfahren zur Überführung eines Einfädelstreifens einer Materialbahn
Title (fr)
Procédé et dispositif pour enfiler une bande
Publication
Application
Priority
DE 19954466 A 19991112
Abstract (en)
The assembly (1) to thread the leader strip of a paper/cardboard web, across the space between the pick-up zone (3) and transfer zone (5) of two machine sections, has two transfer belts (13,15) against each other at least at the transfer stretch. The leader strip is carried between the belts, which clamp it in place. The transfer belts (13,15) are moved from a rest position into the transfer stretch, across the direction of web travel, when a leader strip is to be threaded through. Each transfer belt (13,15) is continuous, forming a closed loop. They are brought together at the start of the transfer stretch, and separated at the end of it. The transfer belts (13,15) pass around at least one guide disk (25,27,29), rotating freely at the end side of a roller (7,9,11). The movement of the transfer belts (13,15), across the direction of web travel, is equal to the belt width of 20-600 mm and pref. 200 mm. The transfer belts (13,15) have a thickness of 0.2-4.0 mm. The position of the transfer belts (13,15) is shifted into the center of the web movement path. The transfer belts (13,15) are of plastics, metal or leather, and at least their facing surfaces are smooth. At least one transfer belt (13,15) is permeable to gas. Each transfer belt (13,15) is carried by a system (31,31') to move its position and has a unit (37,37') to control its edge setting together with a speed control. An Independent claim is included for a web leader strip threading action, where the transfer belt is moved from a parked position into the path of web travel. The web leader strip is advanced to lie on the transfer belt to be carried to the entry of the next machine section, and the transfer belt is returned to its inactive setting. Preferred Features: During the transfer action, the web leader strip is held firmly in a force fit by a clamping force between the two transfer belts which is sufficient to overcome a longitudinal drawing tension.
Abstract (de)
Es wird eine Vorrichtung und ein damit realisierbares Verfahren zur Überführung eines Einfädelstreifens einer Materialbahn, insbesondere Papier- oder Kartonbahn, im Bereich eines freien Bahnzugs von einem Übernahmebereich an einen Übergabebereich vorgeschlagen. Die Überführungsvorrichtung weist erste und zweite Überführungsbänder auf, die entlang des freien Bahnzugs verlagerbar und zumindest im Bereich der Überführungsstrecke aneinander anliegend geführt sind und den Einfädelstreifen zwischen sich klemmend halten. Darüber hinaus ist eine Bandverlagerungseinrichtung vorgesehen, mit deren Hilfe die Überführungsbänder aus einer außerhalb des Bahnlaufweges vorgesehenen Ruhestellung quer oder im wesentlichen quer zur Bahnlaufrichtung in den Bahnlaufweg hineinbewegbar sind. <IMAGE> <IMAGE>
IPC 1-7
IPC 8 full level
D21G 9/00 (2006.01)
CPC (source: EP)
D21G 9/0063 (2013.01)
Citation (search report)
- [DA] DE 2365438 A1 19750206 - VOITH GMBH J M
- [A] DE 758983 C 19530511 - VOITH J M FA
- [A] WO 9713032 A1 19970410 - VALMET CORP [FI]
Designated contracting state (EPC)
AT DE FI SE
DOCDB simple family (publication)
EP 1099794 A1 20010516; EP 1099794 B1 20040519; AT E267292 T1 20040615; DE 19954466 A1 20010517; DE 50006473 D1 20040624
DOCDB simple family (application)
EP 00122669 A 20001018; AT 00122669 T 20001018; DE 19954466 A 19991112; DE 50006473 T 20001018