Abstract: A lampshade is manufactured from heat deformable sheet material by forming a blank of the sheet material, in the shape of a sector of an annulus, into a hollow truncated cone having upper and lower peripheral edges. The overlapping edges of the blank are welded or bonded together and the blank supported by an apparatus which engages the interior of the conical blank, which apparatus includes an upper former for engagement with the interior surface of the blank adjacent the upper edge thereof and a lower support, releasably supporting a stiffening ring around its periphery, for example magnetically, so that upper marginal edge portion of the blank projects beyond the upper former and so that the lower marginal edge portion of the blank projects beyond the stiffening ring supported by the lower support.

Abstract: A lampshade is manufactured from heat deformable sheet material by forming a blank of the sheet material, in the shape of a sector of an annulus, into a hollow truncated cone having upper and lower peripheral edges. The overlapping edges of the blank are temporarily tacked together and the blank supported by an apparatus which engages the interior of the conical blank, which apparatus includes a former for engagement with the interior surface of the blank adjacent the upper and lower peripheral edges thereof so that marginal edge portions of the blank project beyond the formers. Heating means heat the marginal edge portions and upper and lower die members engage the heated and softened marginal edge portions to fold or roll the deformable sheet material around the edge portions of the formers and thereafter hold the formed edge portions in place until the material has cooled.

Abstract: There is disclosed a temporary structure for use in exhibition stands and the like, comprising a framework comprising rectangular frame units each comprising two parallel vertical tubes and two horizontal spars, each in the form of an H with a much elongated cross member and much shortened uprights each of which provides two plugs, respectively above and below the cross member, two said plugs of each said horizontal spar being engaged in respective sockets afforded by the ends of respective ones of the two vertical tubes of the respective frame unit.In an extended structure each horizontal spar may form the lower spar of one such rectangular frame unit and the upper spar of an adjoining lower frame unit. Spring collets may be fitted around the plugs and within the sockets in which the plugs are inserted the colletts having cutting edges to score the socket walls, and having internal projections fitting in recesses in the plugs whereby a firm non-rotatable connection can be obtained.