Cross lapper

Abstract

A cross lapper for laying a fleece from a card web includes a laying carriage movable transversely with respect to an output conveyor belt above same, and an upper carriage as well as a plurality of card web transport belts for passing the card web through the upper carriage and the laying carriage into an output nip formed at the laying carriage, wherein a belt entrance with a downwardly inclined entrance zone is formed at the upper carriage through which a first card web transport belt is passed, which extends from a lower end of the entrance zone in the direction towards the laying carriage, and is accompanied in parallel in this section by a section of a second card web transport belt enclosing the card web together with this belt up to the laying carriage. The second card web transport belt leaving the laying carriage and guided back to same extends through a tensioning carriage only which is movable transversely with respect to the output conveyor belt, but is not passed through the upper carriage.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a schematic view of a first embodiment of the invention;

FIG. 2 shows a schematic view of a second embodiment of the invention;

FIG. 3 shows a schematic view of a simplified variant of the second embodiment of the invention, and

FIGS. 4 a to 4e show sections of schematic side elevation views of embodiments of the upper carriage of the invention that can be used with the above-mentioned embodiments.

Claims

1. A cross lapper for laying a fleece from a card web, said cross lapper including a laying carriage (3) movable on rails in a machine stand transversely to an output conveyor belt (1) above same and an upper carriage (18) movable in the machine stand transversely to said output conveyor belt on rails as well, and a plurality of card web transport belts for guiding the card web through the upper carriage and the laying carriage into a discharge nip formed at the laying carriage, wherein a belt entrance with a downwardly inclined entrance zone is formed at the upper carriage, through which a first card web transport belt is passed, which extends from a lower end of the entrance zone in a section towards the laying carriage, and is accompanied in parallel in this section by a section of a second card web transport belt enclosing the card web together with same until the laying carriage, and is guided back through the laying carriage as a cover belt over the output conveyor belt and in parallel thereto towards the laying carriage, wherein a section of the second card web transport belt guided back to the laying carriage is passed through a tensioning carriage only which is movable transversely with respect to the output conveyor belt, said second card web transport belt bypassing said upper carriage (18).

2. The cross lapper as claimed in claim 1 comprising a second endless belt passed through the laying carriage and forming a second cover belt, said second cover belt together with the second card web transport belt forming the discharge nip within the laying carriage, said second cover belt being guided via stationary deflection rollers to a deflection roller supported in the tensioning carriage of the second card web transport belt and looping same.

3. The cross lapper as claimed in claim 1, wherein the first card web transport belt is a perforated belt.

4. The cross lapper as claimed in claim 1, wherein in the belt entrance the first card web transport belt is opposed by a guiding device which is independent from the second card web transport belt and together with the first card web transport belt forms a card web entrance zone.

5. The cross lapper as claimed in claim 2, characterized in that the first card web transport belt is a perforated belt and the two belts acting as cover belts are each guided over two drive rollers coupled to individual motors

6. A cross lapper for laying a fleece from a card web, said cross lapper including a laying carriage movable on rails in a machine stand transversely with respect to an output conveyor belt above same and an upper carriage movable in the machine stand transversely to said output conveyor belt on rails as well, and two card web transport belts for guiding the card web through the upper carriage and the laying carriage into a discharge nip formed at the laying carriage, wherein a belt entrance with a downwardly inclined entrance zone is formed at the upper carriage, and a first card web transport belt extending over the upper carriage is guided through the laying carriage and transversely over the output conveyor belt and through a first tensioning carriage back to the belt entrance, and a second card web transport belt is passed through the laying carriage, said second card web transport belt having an upper part extending in parallel and at a close distance to a section of the first card web transport belt extending from a lower end of the belt entrance in a direction towards the laying carriage, said second card web transport belt further comprising a lower part extending in a same plane as a section of the first card web transport belt leaving the laying carriage, wherein a section of the second card web transport belt returning from the laying carriage in a direction towards the lower end of the belt entrance is passed through a second tensioning carriage only which is movable transversely with respect to the output conveyor belt, said second card web transport belt being not passed through the upper carriage but is bypassing same.

7. The cross lapper as claimed in claim 6, wherein the first card web transport belt is guided within the laying carriage in parallel to the second card web transport belt up to a discharge nip disposed above the output conveyor belt, where the two card web transport belts each loop around a respective deflection roller and separate from one another.

8. The cross lapper as claimed in claim 6, wherein in the belt entrance zone the first card web transport belt is opposed by a guiding device which is independent from the second card web transport belt and together with the first card web transport belt forms a card web entrance.

9. The cross lapper as claimed in claim 7, wherein the guiding device consists of a plurality of rollers disposed close to one another and to the first card web transport belt.

10. The cross lapper as claimed in claim 9, wherein the rollers composed of disks axially spaced from one another, the disks of two adjoining disk rollers being are axially mutually set to nip, a radial distance of said rollers being smaller than a disk diameter so that the disk rollers mutually penetrate one another.

11. The cross lapper as claimed in claim 8, wherein the guiding means is formed by a guide belt endlessly revolving within the upper carriage, said guide belt being guided in the upper carriage over two deflection rollers.

12. The cross lapper as claimed in claim 11, wherein one of the deflection rollers of the guide belt within said upper carriage is arranged above a deflection roller of the first card web transport belt delimiting a transport belt entrance zone at an upper end of same.

13. The cross lapper as claimed in claim 11, wherein the guide belt is a perforated belt.

14. The cross lapper as claimed in claim 12, wherein the guide belt is a perforated belt.

15. The cross lapper as claimed in claim 8, wherein the guiding device is formed by a compression roller which is arranged next to a deflection roller of the first card web transport belt delimiting a card web transport belt entrance zone within said upper carriage at a lower end on a same level as said deflection roller.

16. The cross lapper as claimed in claim 15, wherein the guiding device comprises a second compression roller arranged next to a deflection roller of the first card web transport belt delimiting a card web transport belt entrance zone within the upper carriage at an upper end approximately on a same level as said deflection roller.

17. The cross lapper as claimed in claim 8, wherein the guiding device is a sheet with a smooth surface opposing the first card web transport belt in a card web transport belt entrance zone within the upper carriage.

18. The cross lapper as claimed in claim 6, wherein the first card web transport belt is a perforated belt.

19. The cross lapper as claimed in claim 18, wherein a suction means is provided within the upper carriage in the area of the entrance zone on the side opposing the first card web transport belt.