is urged into contact with the outer and side contours of both lower rollers 30 31 thus acting as a doctor blade 51 to allow for the insertion of fabric before the machine is started a tight closing door 52 is provided in at least one of side walls 13 while hooks 53 are fitted on the drum for hooking up the fabric referring now to fig3 the device comprises a shell 101 of metal sheet made up of a bottom 102 two side walls 103 two head walls 104 and a cover 105 all connected with each other fitted inside of shell 101 are two crosswise directed partition walls 106 parallel to head walls 104 that extend from the one to the opposite side walls 103 and from the bottom 102 upwardly without however coming into contact with the cover 105 fitted between each head wall 104 and each crosswise directed wall 106 is an intervening wall 107 that extends from the one to the opposite side walls 103 and from the cover 105 toward the bottom 102 without however coming into contact therewith an u shaped channel consisting of two sides 108 109 and of a bottom 110 is defined by the three walls 104 106 107 along with the bottom 102 and.