| 摘要 |
A pressure device with resilient elements, in particular brush elements of a brush body that are mechanically coupled with a spring system having a number of spring elements (37*) arranged between a base plate (34*) and a bottom plate (38*), wherein the brush elements (B1*, B2*, ..., Bi*, ..., Bn*) of the pressure device are mechanically coupled with a double spring system, that is composed of the aforementioned spring system and a further spring system, wherein the aforementioned spring system altogether is pre-tensioned to a pre-defined minimum pressure force F2min in the state of rest. The pressure force F2 rises linearly with the thickness, wherein there are provided at least two first stop elements (341*) that limit the stroke of the base plate (34*) to the bottom plate (38*) in the direction of gravity, wherein, after the stop elements (341*) have hit, the brush elements in total exert a minimum pressure force F1min that, depending on the thickness, exert a non-linearly rising pressure force up to an optimum pressure force F1opt on the flat item, and that the further spring system is altogether pre-tensioned to a pre-defined pressure force F3min that is equal to the optimum pressure force F1opt of the brush elements and, in the state of operation for flat items from a second thickness on, exerts a pressure force F3 linearly rising with the thickness, wherein the following applies: F3 > F3mim = F1opt > F1 > F1min = F2max > F2 > F2min. |
