Disclosed is an installation for producing thermoplastic containers including: a container coating station including an input wheel and an output wheel; an upstream transfer wheel that is tangent with the input wheel in an input tangential zone; and a downstream transfer wheel that is tangent with the output wheel in an output tangential zone. The installation includes a bypass wheel that is directly tangent with the upstream transfer wheel in an upstream tangential zone and the bypass wheel that is directly tangent with the downstream transfer wheel in a downstream tangential zone.