the tunnel finisher since the envelope of each pneumatic roller yields to pressure any creasing of the clothing articles is prevented as soon as a clothing article has entered first chamber 3 by this continuous transport steam injector assembly 10 is operated to inject steam onto the clothing article from at least two sides causing the fabric to be relaxed after the steam treatment of the clothing article 9b the latter passes from first chamber 3 into second chamber 4 while a second clothing article 9a enters first chamber 3 the above described process is repeated in first chamber 3 while the first clothing article 9b in second chamber 4 is treated with heated air supplied by the fan for drying and smoothing the fabric so that the clothing article is free of creases after leaving second chamber 4 the treatment carried out in second chamber 4 is then repeated for the second clothing article the dwell times in the steam and hot air treatment chambers are variable by suitably controlling the chain speed since the compressed air filled pneumatic rollers of each pair are in light contact with one another each chamber is effectively isolated from the other one and from the surrounding atmosphere the replacement of the envelope of any pneumatic roller is suitably carried out after dismounting the respective roller from the tunnel finisher the pneumatic rollers are accessible either from the front or from the rear of the housing or through the door 33 provided.