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1. WO1997042080 - APPAREIL SERVANT A RECOUVRIR UN TUBE DE COLORANT TEXTILE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

We Cl aim :
1. An apparatus for covering a textile dye tube with a filter sheet, said apparatus comprising:
(a) a hollow mandrel for supporting said tube,
at least a portion of the outer surface of
said mandrel having a plurality of
openings ;
(b) a vacuum source connected to said mandrel
for drawing said sheet against said
mandrel; and
(c) sealing means for bonding the overlapping
edges of said sheet to one another.

2. The apparatus according to Claim 1, further including means for wrapping said sheet around said tube in a direction opposite to the direction the yarn is wrapped, thereby significantly reducing snagging of the yarn on the overlapping edges of the sheet when the yarn is unwrapped.

3. The apparatus according to Claim 1, wherein said mandrel includes a mandrel support table having a tube loading station, a sheet wrapping station, a sealing station, and a discharge station; table drive means for indexing said mandrel sequentially to each of said stations; a vacuum chamber extending from said tube wrapping station to said sealing station, said vacuum chamber drawing a vacuum inside said mandrel at and between said wrapping and sealing stations; a tube feeder for feeding tubes to said tube loading station; a sheet feeder for feeding sheets of filter material to said wrapping station; and a sealer at said sealing station for sealing said sheet around the circumference of said tube.

4. The apparatus according to Claim 3, further including a mandrel drive means for rotating said mandrel at said wrapping station to wrap said sheet around the circumference of said tube.

5. The apparatus according to Claim 3, further including locking means for preventing said mandrel from rotating when said mandrel is indexed from said wrapping station to said sealing station.

6. The apparatus according to Claim 3 , including four mandrels adapted to sequentially move to each of said stations.

7. The apparatus according to Claim 3, wherein said table is positioned to rotate in a vertical plane, with said mandrel being positioned horizontally on said table .

8. The apparatus according to Claim 1, further including a sheet feeder positioned to convey said sheet of filter material to said tube, said sheet having spaced leading and trailing edges positioned parallel to the axis of said tube, said edges being spaced at a distance greater than the circumference of said tube.

9. The apparatus according to Claim 8, wherein said sheet feeder includes a conveyor having a movable sheet support surface with a discharge end at said tube wrapping station and a vacuum source beneath said
surface.

10. The apparatus according to Claim 9, wherein said sheet feeder further includes a supply roller for supporting a roll of filter material, a feed roller for withdrawing said filter material from said roller, and a cutter for cutting said filter material into said sheets.

11. The apparatus according to Claim 1, further including a tube loading station for loading each of said tubes onto said mandrel .

12. The apparatus according to Claim 11, further including a tube feeder for feeding tubes to said tube loading station.

13. The apparatus according to Claim 12, wherein said tube feeder includes a tube conveyor and an ejector adapted to eject a tube from said conveyor onto said mandrel when said mandrel is indexed to said tube loading station.

14. An apparatus for attaching a thermoplastic filter sheet to a textile dye tube, said apparatus comprising: sealing means for bonding said sheet edges to each other and to said tube, said sealing means including a heating bar movable between a retracted position and an extended position in contact with said sheet wrapped tube.

15. The apparatus according to Claim 14, wherein said dye tube includes a plurality of ridges and said bar contacts said sheet wrapped tube on said ridges.

16. The apparatus according to Claim 15, wherein said dye tubes include spaced circumferential ridges and said bar is positioned to contact said sheet wrapped tube on said ridges.

17. The apparatus according to Claim 14, wherein said bar is heated to a temperature sufficient to melt said sheet .

18. The apparatus according to Claim 17, wherein said bar is heated to a temperature of between about 400°F and 450°F to attach said sheet to said tube.

19. An apparatus for covering a textile dye tube with a thermoplastic filter sheet, said apparatus
comprising:
(a) a hollow mandrel for supporting said tube,
at least a portion of the outer surface of
said mandrel having a plurality of
openings ;
(b) a vacuum source connected to said mandrel
for drawing said sheet against said
mandrel ;
(c) sealing means for bonding the overlapping
edges of said sheet to each other and to
said tube, said sealing means including a
heating bar movable between a retracted
position and an extended position in
contact with said sheet wrapped tube; and

(d) means for wrapping said sheet around said
tube in a direction opposite to the
direction the yarn is wrapped, thereby
significantly reducing snagging of the
yarn on the overlapping edges of the sheet
when the yarn is unwrapped.

20. The apparatus according to Claim 19, wherein said mandrel includes a mandrel support table having a tube loading station, a sheet wrapping station, a sealing station, and a discharge station; table drive means for indexing said mandrel sequentially to each of said stations; a vacuum chamber extending from said tube wrapping station to said sealing station, said vacuum chamber drawing a vacuum inside said mandrel at and between said wrapping and sealing stations; a tube feeder for feeding tubes to said tube loading station; a sheet feeder for feeding sheets of filter material to said wrapping station; and a sealer at said sealing station for sealing said sheet around the circumference of said tube .

21. The apparatus according to Claim 20, further including a mandrel drive means for rotating said mandrel at said wrapping station to wrap said sheet around the circumference of said tube.

22. The apparatus according to Claim 20, further including locking means for preventing said mandrel from rotating when said mandrel is indexed from said wrapping station to said sealing station.

23. The apparatus according to Claim 20, including four mandrels adapted to sequentially move to each of said stations.

24. The apparatus according to Claim 20, wherein said table is positioned to rotate in a vertical plane, with said mandrel being positioned horizontally on said table .

25. The apparatus according to Claim 19, further including a sheet feeder positioned to convey said sheet of filter material to said tube, said sheet having spaced leading and trailing edges positioned parallel to the axis of said tube, said edges being spaced at a distance greater than the circumference of said tube.

26. The apparatus according to Claim 25, wherein said sheet feeder includes a conveyor having a movable sheet support surface with a discharge end at said tube wrapping station and a vacuum source beneath said
surface.

27. The apparatus according to Claim 26, wherein said sheet feeder further includes a supply roller for supporting a roll of filter material, a feed roller for withdrawing said filter material from said roller, and a cutter for cutting said filter material into said sheets.

28. The apparatus according to Claim 19, further including a tube loading station for loading each of said tubes onto said mandrel.

29. The apparatus according to Claim 28, further including a tube feeder for feeding tubes to said tube loading station.

30. The apparatus according to Claim 29, wherein said tube feeder includes a tube conveyor and an ejector adapted to eject a tube from said conveyor onto said mandrel when said mandrel is indexed to said tube loading station.

31. The apparatus according to Claim 19, wherein said bar is toothed, whereby said bar contacts said sheet wrapped tube at a plurality of spaced areas.

32. The apparatus according to Claim 31, wherein said dye tubes include spaced circumferential ridges and said bar is positioned to contact said sheet wrapped tube on said ridges.

33. The apparatus according to Claim 19, wherein said bar is heated to a temperature sufficient to melt said sheet .

34. The apparatus according to Claim 33, wherein said bar is heated to a temperature of between about 400°F and 450°F to attach said sheet to said tube.

35. A cylindrical dye tube having a covering around its periphery, said covering comprising a liquid
permeable sheet wrapped sheet around said tube in a direction opposite to the direction the yarn is wrapped, thereby significantly reducing snagging of the yarn on the overlapping edges of the sheet when the yarn is unwrapped .

36. The tube according to Claim 35, wherein said edges are axially aligned with said tube.

37. The tube according to Claim 35, wherein said edges and said tube being sealed to each other.

38. The tube according to Claim 35, wherein said tube includes a plurality of peripherally extending ridges, said edges and said tube being sealed only on said ridges .

39. The tube according to Claim 35, wherein said sheet is a perforated, thermoplastic film.

40. A method for covering a textile dye tube with a filter sheet, said method comprising the steps of:
(a) supporting said tube on a hollow mandrel,
at least a portion of the outer surface of
said mandrel having a plurality of
openings ;
(b) drawing said sheet against said mandrel
using a vacuum source connected to said
mandrel; and
(c) bonding the overlapping edges of said
sheet to one another.

41. A method for covering a textile dye tube with a thermoplastic filter sheet, said method comprising the step of : bonding said sheet edges to each other and to said tube using a heating bar movable between a retracted position and an extended position in contact with said sheet wrapped tube .

42. A method for covering a textile dye tube with a filter sheet, said method comprising the steps of:
(a) supporting said tube on a hollow mandrel,
at least a portion of the outer surface of
said mandrel having a plurality of
openings;
(b) drawing said sheet against said mandrel
using a vacuum source connected to said
mandrel ;
(c) wrapping said sheet around said tube in a
direction opposite to the direction the
yarn is wrapped, thereby significantly
reducing snagging of the yarn on the
overlapping edges of the sheet when the
yarn is unwrapped; and
(d) bonding the overlapping edges of said
sheet to each other and to said tube using
a heating bar movable between a retracted
position and an extended position in
contact with said sheet wrapped tube.