Apparatus and method for winding and transporting paper
View Patent ↗A reel for winding a paper roll including: a frame supporting a reel drum and a pair of rails; a reel spool supported for translation by the rails and upon which a paper roll is wound; an endless flexible belt wrapping a portion of the periphery of the reel drum and a portion of the periphery of the paper roll; and a loading member for loading the paper roll against the reel drum and the endless flexible belt.
1. A reel for winding a paper roll comprising:
a frame supporting a reel drum and a pair of rails;
a reel spool supported for translation by the rails and upon which the paper roll is wound;
an endless flexible bottom transfer belt for transporting a paper web to the paper roll, said bottom transfer belt wrapping a portion of a bottom lead-in roller and a portion of the periphery of the reel drum and a portion of the periphery of the paper roll;
a top transfer belt for transporting the paper web from a dryer and transferring the paper web to the bottom transfer belt, said top transfer belt wrapping a portion of a top lead-in roller and a portion of a top exit roller, such that the paper web is sandwiched between the top transfer belt and the bottom transfer belt in a sandwich section located between the bottom lead-in roller and the top exit roller;
a loading member for loading the paper roll against the reel drum and the bottom transfer belt;
wherein the paper web is not compressed while transported by the top transfer belt;
wherein the paper web is not compressed while transported by the bottom transfer belt; and
wherein the reel drum and bottom transfer belt, combined with the action of the loading member, creates a pressure profile on the paper roll having a semi-elliptical initial portion and a linear second portion.
2. The reel of claim 1 wherein the paper roll has a diameter between about 70 inches to about 150 inches.
3. The reel of claim 1 wherein a maximum pressure in the semi-elliptical initial portion is between about 2 to about 30 lb/in 2 .
4. The reel of claim 1 wherein a maximum pressure in the semi-elliptical initial portion is between about 1 to about 15 lb/in 2 .
5. The reel of claim 1 wherein the reel does not have a center wind assist.
6. The reel of claim 1 wherein the bottom transfer belt forms a wrap angle α, and the wrap angle α is adjusted by moving a guider roller as the paper roll is wound.
7. The reel of claim 1 wherein the paper web in the sandwich section is subjected to a nip impulse between about 0 PSI*msec to about 8 PSI*msec.
8. The reel of claim 1 wherein the paper web in the sandwich section is subjected to a nip impulse between about 0 PSI*msec to about 3 PSI*msec.
9. The reel of claim 1 comprising a gap G between the top transfer belt and the bottom transfer belt at the bottom lead-in roller and the gap G is between about 0.010 inch to about 0.5 inch.
10. The reel of claim 1 comprising a gap G between the top transfer belt and the bottom transfer belt at the bottom lead-in roller and the gap G is between about 0.020 inch to about 0.080 inch.
11. The reel of claim 1 wherein the top transfer belt and bottom transfer belt are air permeable and the permeability of the bottom transfer belt is between about 100 cfm/ft 2 to about 350 cfm/ft 2 less than the permeability of the top transfer belt.
12. The reel of claim 1 wherein the top transfer belt and the bottom transfer belt are parallel to each other in the sandwich section and separated by a gap G, and the gap G is between about 0.010 inch to about 0.5 inch.
13. The reel of claim 1 comprising a transfer vacuum box located adjacent to the top transfer belt after the top lead-in roller, wherein the transfer vacuum box extends in the machine direction past the bottom lead-in roller.