Single facer for producing corrugated board with a system for controlling the pressing belt, and related method
AssigneeFosber S.p.A.
InventorsLorenzo VANNUCCHI, Mauro ADAMI
Life of this patent
Estimating the term…
Abstract
A system and a method are disclosed for preventing shifting and twisting of a continuous flexible pressing member in a single facer, i.e. in a machine producing single-face corrugated board by coupling together a smooth paper web and a fluted paper web through the single facer. A system and a method for correcting the position of the continuous flexible member in the event of shifting or twisting are so configured as to keep an offset adjustment to reduce or to eliminate the tendency of the continuous flexible member to twist or to shift laterally.
Claims22
1-23. (canceled)
A single facer for producing single-face corrugated board, comprising:
- (A) a first corrugating roller and a second corrugating roller, meshing with each other;
- (B) a support structure comprising a first arm on a first side of the single facer and a second arm on a second side of the single facer;
- (C) a first guide roller with a first rotation axis, supported through a respective first support on the first arm and through a respective second support on the second arm;
- (D) a second guide roller with a second rotation axis, supported through a respective first support on the first arm and through a respective second support on the second arm;
- (E) a continuous flexible member driven around the first guide roller and the second guide roller and having a first longitudinal edge and a second longitudinal edge, the first longitudinal edge and the second longitudinal edge extending parallel to a forward direction of the continuous flexible member;
- (F) an adjusting and guiding arrangement for adjusting and guiding the continuous flexible member, comprising:
- (F1) sensors adapted to detect a lateral shifting and a twisting of the continuous flexible member;
- and
- (F2) actuators adapted to modify a mutual position of the first guide roller and of the second guide roller;
- (F3) a control unit configured for:
- (a) activating the actuators based on signals received from the sensors and to perform a correction cycle by modifying the mutual position of the first guide roller and of the second guide roller from an initial position to a correction position causing a correction of the lateral shifting and the twisting;
- and
- (b) once the lateral shifting and the twisting has been removed or corrected, bringing the first guide roller and the second guide roller into an intermediate position between the initial position and the correction position.
A method for controlling a single facer for producing single-face corrugated board comprising:
- a first corrugating roller and a second corrugating roller meshing with each other;
- a support structure having a first arm on a first side of the single facer and a second arm on a second side of the single facer;
- a first guide roller;
- a second guide roller;
- a continuous flexible member, driven around the first guide roller and the second guide roller and pressed against the second corrugating roller;
- the method comprising steps as follows:
- monitoring position of the continuous flexible member with respect to the first guide roller and the second guide roller during rotation of the first guide roller and of the second guide roller, to detect lateral shifting and twisting of the continuous flexible member;
- if a lateral shifting and/or a twisting of the continuous flexible member is detected, performing a correction cycle by modifying mutual positions of the first guide roller and of the second guide roller from an initial position to a correction position, causing a correction of the lateral shifting and/or the twisting;
- and
- once the lateral shifting and/or the twisting has been corrected, bringing the first guide roller and the second guide roller into an intermediate position between the initial position and the correction position.
Dependencies are inferred from the claim text.