To determine if a box will tumble at any angle:
1. Draw conveyor angle and box size (H & L)
2. Find center of box by adding lines “A” & “B”
3. Draw vertical line “C” 4. Determine lower third of box length (1//3 L)
Figure 1: If line “”C” falls within upper 2/3, box will not tumble.
Figure 2: If line “C” falls within lower third, the box may tumble depending on the weight distribution within.
2. When transferring packages from a horizontal conveyor to an incline, some means of helping the package onto the incline must be provided. A belt conveyor or power feeder must be put in front on the incline and should be as long as the longest package.
To prevent package from tearing, a smooth surface belt should be used on all feeders attached to lower end of inclined conveyor.
REASON
Point “A” is moving horizontally faster than point “B”. A smooth belt on feeder will allow package to slip at point “A” until it transfers to incline conveyor.