A seal system (1) for use in mixing apparatus (2) comprising a rotating shaft (3) which passes through a fixed structure (4), the seal system (1) being adapted both to prevent egress of content from the apparatus, and to resist ingress of material into the seal system.

The present disclosure relates to an application apparatus for mixing a plurality of components for producing a multicomponent mixture, in particular a polyurethane foam, and for introducing and/or applying the multicomponent mixture into and/or onto an object, in particular a lithium-ion battery, comprising: a mixing tube having a first closed end and a second end for discharging the multicomponent mixture from the mixing tube, wherein the mixing tube has a mixing space, a plurality of injection units arranged on the mixing tube, each configured to inject one of the plurality of components into the mixing space, a mixer arranged in the mixing space, configured to mix the injected components with one another, and a moving device configured to move the mixer between the first end and the second end. Furthermore, an application system comprising the application apparatus and a method for mixing a plurality of components for producing a multicomponent mixture and for introducing and/or applying the multicomponent mixture into and/or onto an object is disclosed.

A mixing device includes a mixing container for receiving mixing material and a mixer cover, wherein a first seal and a second seal is provided between the mixing container and the mixer cover. The first seal and the second seal are so arranged that a first air space is formed between the first seal and the second seal.