Global Patent Index - EP 0795505 A3

EP 0795505 A3 19980204 - Device for flying roll-changing in an unwinding station under constant web tension

Title (en)

Device for flying roll-changing in an unwinding station under constant web tension

Title (de)

Vorrichtung zum fliegenden Rollenwechsel in einer Abrollstation bei konstantem Bahnzug

Title (fr)

Dispositif de changement de rouleau à la volée dans un poste de dévidage et sous tension de bande constante

Publication

EP 0795505 A3 19980204 (DE)

Application

EP 97101314 A 19970129

Priority

DE 29604882 U 19960315

Abstract (en)

[origin: JPH1017182A] PROBLEM TO BE SOLVED: To prevent a temporary lowering of a web tension and to completely maintain the web tension at a point of time of an adhesion process. SOLUTION: By a number of revolutions control device 12 arranged at a control device 11, a drive device 10 is controlled to the number n of revolutions so that the rotation speed of a primary winding body 3 is increased to a value higher than the speed of a web unwound from a secondary winding body 1. The number of revolutions control device 12 decelerates the rotation speed of the primary winding body 3 from the number nR of revolutions to the number Nsynch equivalent to the unwinding speed of a secondary winding body 1. The control device 11 controls deceleration to the number nsynch equivalent to the unwinding speed of the web of the secondary winding body 1 so that a brake force at a point of time at which the web of the primary winding body 3 is taken off, a brake force is adjusted to a value equivalent a force high enough to allow maintenance of a web tension. A web tension control device 13 is provided to maintain a web tension after adhesion.

IPC 1-7

B65H 19/18

IPC 8 full level

B65H 19/16 (2006.01); B65H 19/18 (2006.01); B65H 23/182 (2006.01)

CPC (source: EP US)

B65H 19/181 (2013.01 - EP US); B65H 2513/10 (2013.01 - EP US); B65H 2515/31 (2013.01 - EP US); B65H 2515/32 (2013.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

DE FI IT SE

DOCDB simple family (publication)

DE 29604882 U1 19960627; EP 0795505 A2 19970917; EP 0795505 A3 19980204; JP H1017182 A 19980120; US 5732903 A 19980331

DOCDB simple family (application)

DE 29604882 U 19960315; EP 97101314 A 19970129; JP 6285597 A 19970317; US 81597097 A 19970313