Patent ID: 8875359

Claim:
A rotary drum for a fiber-stacking device which is provided with: a drum body; a plurality of pattern plates, each of which has at least one fiber-stacking depression; and a plurality of holding mechanisms which hold corresponding pattern plates on an outer circumferential surface of the drum body in a detachable manner, wherein each holding mechanism is provided with: a fixed hook immovably attached to one side of the drum body, the fixed hook forming a fixed side holding groove with the outer circumferential surface of the drum body; and a movable hook attached to the other side of the drum body to be movable between a holding position and a release position, the movable hook forming a movable side holding groove with the outer circumferential surface of the drum body when at the holding position, and opening the movable side holding groove when at the release position, and, wherein when the movable hook is at the holding position, the two side parts of a pattern plate are held in the fixed side holding groove and in the movable side holding groove, whereby the pattern plate is held.