A roll is described, particularly a roll for crushing or de-agglomerating different materials. It can be used in all situations where deformations of the roll ends, in association with a constant roll gap, constitute a problem, particularly at high roll loadings. The object of the invention is to further develop a roll of this type so that variable adjustments or a constant roll gap are possible at different operating stages. This object is achieved in that the roll consists of a core and a roll shell, wherein elastic elements are disposed between the core and the roll shell.
A folding and sealing apparatus supporting a feed platform for feeding a supply of pre-glued forms to the folding and sealing apparatus. The housing accommodating a first roller, a second roller, a third roller and a fourth roller, and the first and second rollers forming a first nip, the second and third roller forming a second nip and the third and fourth roller forming a third nip. A motor drives at least one of the rollers via a drive mechanism. At least one of the rollers having a resilient portion to accommodate an object mounted on a form, passing through the nips while maintaining appropriate folding and sealing pressure on the supporting form to provide a sufficient sealing pressure to the folded form, as the folded form passes through the nips to facilitate both folding and sealing of the folded form. A cleaning arm is provided adjacent one of the rollers to remove debris therefrom, and a collection bin is provided adjacent the third nip for collecting the folded and sealed forms upon exiting from the folding and sealing apparatus.
