GB1107334A - Manufacture of printing cylinders - Google Patents

Abstract

1,107,334. Coated glass rollers. WINDMOLLER & HOLSCHER. 4 May, 1965 [8 May, 1964; 16 Nov., 1964], No. 18759'65. Heading B2K. [Also in Divisions B5 and F2] A printing cylinder is built up on a moulded carrier 102 of glass fibre impregnated with thermosetting material by spraying or spreading by means of a bar layers 103. 104 of thermosetting material containing chopped glass strands and powdered quartz, and thermosetting material respectively. The carrier 102 is firstly fitted with moulded reinforcing rings 113 and then cardboard end discs 107 each with a tapered centring ring, are inserted against the end rings 113; the discs are reinforced by impregnated glass fibre 108 onto which a layer 109 similar to layer 103 is cast and cured. The centring rings are removed and the carrier centred and fixed on a shaft, rings 111, 112 of plastics or metal are then adhered to the end walls. The carrier and shaft are rotated and layer 103 applied by a spray or a spreader bar, a hot air stream over the carrier accelerating the curing. The finishing layer 104, which may be coloured, is then sprayed or spread on and after curing the finishing layers 110 are added to the end walls. The spraying apparatus is coupled to a cutting mechanism for cutting the glass strands. The roller is then finish-ground and the edges rounded. A double-walled cylinder, Figs. 10-14 not shown, has a honey-comb structure or a helically coiled tube inserted between two layers, each similar to layer 102, the coiled tube being surrounded by a wire mesh to support the outer layer.