continue its travel along support table 30 drive wheel 106 is attached to rotatable shaft 56 in such a manner that it rotates with shaft 56 drive wheel 106 is also adjusted laterally across the rotatable shaft 56 so that it contacts the box spring assembly 10 in the area of the side rail 12 the attachment subassembly 76 is located on the side of the frame 52 opposite the first attachment subassembly 74 the second attachment subassembly 76 may be of similar construction but a mirror image of the first attachment subassembly 74 in the preferred embodiment however the construction can be greatly simplified by attaching all of the components to a subframe 110 which is attached directly to the frame 52 the lateral positioning side guide 112 therefore is attached directly to the subframe 110 the lateral positioning side guide 112 also has an entrance portion 114 which is bent outward at an angle to aid in guiding the box spring 110 as it enters the attachment assembly 32 a bracket 113 holds the sheet metal fabric turning guide 116 and the fabric turning roller 118 fabric turning roller 118 similar to fabric turning roller 92 has its axis skewed at an angle to the direction of movement of the box spring assembly bracket 116 again may be spring loaded to force the fabric turning roller 118 and the fabric turning guide 116 down toward the lateral side guide 112 an entrance drive wheel 120 similar in construction to the entrance drive wheel 94 is attached to the.