| CPC B65B 55/19 (2013.01) [B65B 3/006 (2013.01); B65B 7/2821 (2013.01)] | 8 Claims |

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1. A closing apparatus (10) for closing pharmaceutical containers (68), the closing apparatus (10) comprising:
(i) a tool unit (18) including:
a fluid unit (90), and
a closing tool (42) for joining a closure element (78) to a pharmaceutical container (68); and
(ii) a tool receptacle (14),
wherein the fluid unit (90) has at least two filters (64, 66),
wherein the tool unit (18) is a module which is repeatedly detachable from and connectable to the tool receptacle (14) by a coupling device (16),
wherein the fluid unit (90) is configured to apply at least two different gaseous fluids to the pharmaceutical container (68), and
wherein one of the at least two filters (64, 66) interacts with one of the at least two different gaseous fluids and another of the at least two filters (64, 66) interacts with another of the at least two different gaseous fluids.
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