Bias regulated rolling truck bed cover

1. A tonneau system comprising:

a. a tonneau cover; and

b. a canister including:

i. one or more tracks for guiding the tonneau cover within the canister during movement of the tonneau cover into the canister; and

ii. a retraction system including:

1. a drive roller;

2. a line connecting the drive roller to the tonneau cover; and

3. a bias member that moves the drive roller and the line to assist in moving the tonneau cover into the canister,

wherein the retraction system comprises a tensioner.

2. The tonneau system of claim 1 , wherein the retraction system is located outside of the one or more tracks.

3. The tonneau system of claim 1 , wherein an end of the drive roller includes a pulley that connects the line to the drive roller.

4. The tonneau system of claim 1 , wherein the line extends along an upper surface, a lower surface, or both of the tonneau cover.

5. The tonneau system of claim 1 , wherein the tonneau cover extends along one or more underbody rails and a line rail grommet, through which the line extends, is connected to the one or more underbody rails.

6. The tonneau system of claim 1 , wherein the canister includes a canister cover, and the drive roller is connected to the canister cover.

7. The tonneau system of claim 1 , wherein the canister includes a canister cover at a first end and a canister cover at a second end, the canister cover at the first end and the canister cover at the second end each include the one or more tracks that are a plurality of tracks with a middle region of the canister being free of the canister cover.

8. The tonneau system of claim 1 , wherein the retraction system comprises two lines, and each of the two lines are connected to the drive roller in a region adjacent to opposing bed walls of a vehicle.

9. The tonneau system of claim 1 , wherein the bias member is located within the drive roller.

10. A tonneau system comprising:

a. a tonneau cover; and

b. a canister including:

i. one or more tracks for guiding the tonneau cover within the canister during movement of the tonneau cover into the canister; and

ii. a retraction system including:

1. a drive roller;

2. a line connecting the drive roller to the tonneau cover; and

3. a bias member that moves the drive roller and the line to assist in moving the tonneau cover into the canister,

wherein an end of the drive roller includes a pulley that connects the line to the drive roller.

11. The tonneau system of claim 10 , wherein the line extends along an upper surface, a lower surface, or both of the tonneau cover.

12. The tonneau system of claim 10 , wherein the tonneau cover extends along one or more underbody rails and a line rail grommet, through which the line extends, is connected to the one or more underbody rails.

13. The tonneau system of claim 10 , wherein the canister includes a canister cover at a first end and a canister cover at a second end, the canister cover at the first end and the canister cover at the second end each include the one or more tracks that are a plurality of tracks with a middle region of the canister being free of the canister cover.

14. The tonneau system of claim 10 , wherein the retraction system comprises two lines, and each of the two lines are connected to the drive roller in a region adjacent to opposing bed walls of a vehicle.

15. A tonneau system comprising:

a. a tonneau cover; and

b. a canister including:

i. one or more tracks for guiding the tonneau cover within the canister during movement of the tonneau cover into the canister; and

ii. a retraction system including:

1. a drive roller;

2. a line connecting the drive roller to the tonneau cover; and

3. a bias member that moves the drive roller and the line to assist in moving the tonneau cover into the canister,

wherein the tonneau cover extends along one or more underbody rails and a line rail grommet, through which the line extends, is connected to the one or more underbody rails.

16. The tonneau system of claim 15 , wherein an end of the drive roller includes a pulley that connects the line to the drive roller.

17. The tonneau system of claim 15 , wherein the line extends along an upper surface, a lower surface, or both of the tonneau cover.

18. The tonneau system of claim 15 , wherein the canister includes a canister cover at a first end and a canister cover at a second end, the canister cover at the first end and the canister cover at the second end each include the one or more tracks that are a plurality of tracks with a middle region of the canister being free of the canister cover.

19. The tonneau system of claim 15 , wherein the retraction system comprises two lines, and each of the two lines are connected to the drive roller in a region adjacent to opposing bed walls of a vehicle.

20. A tonneau system comprising:

a. a tonneau cover; and

b. a canister including:

i. one or more tracks for guiding the tonneau cover within the canister during movement of the tonneau cover into the canister; and

ii. a retraction system including:

1. a drive roller;

2. a line connecting the drive roller to the tonneau cover; and

3. a bias member that moves the drive roller and the line to assist in moving the tonneau cover into the canister,

wherein the canister includes a canister cover at a first end and a canister cover at a second end, the canister cover at the first end and the canister cover at the second end each include the one or more tracks that are a plurality of tracks with a middle region of the canister being free of the canister cover.

21. The tonneau system of claim 20 , wherein an end of the drive roller includes a pulley that connects the line to the drive roller.

22. The tonneau system of claim 20 , wherein the line extends along an upper surface, a lower surface, or both of the tonneau cover.

23. The tonneau system of claim 20 , wherein the retraction system comprises two lines, and each of the two lines are connected to the drive roller in a region adjacent to opposing bed walls of a vehicle.