| 摘要 |
The upholstery (18) is releasably tensioned on the frame, its edges having thickened formations, pushed into longitudinal tracks (19) on the under side or inside of the rigid frame. The thickened formations comprise angular plastics strips (20). The plastics strip one arm is pushed into the frame track (19) and has friction-increasing projections for engagement with the track side surfaces. The other arm of the plastics strip is joined with the upholstery edge part and extends away from the track in the same direction as the upholstery. |
