The manufacture of rubber goods : a practical handbook for the use of manufacturers, chemists, and others . varying degrees, patternscan be produced on waterproof cloth in different colours and shadesof colour, which have a very fine appearance and a characteristiceffect. When it comes to proofing a piece of material with acontinuous pattern, the simplest way would be to imprint thedesign on the rubber-covered roller. Such a roller would, however,be very difficult, if not impossible, to make, for it would have to bedone with extreme accuracy, as an error of ^^^ mm. in printingthe material, if
The manufacture of rubber goods : a practical handbook for the use of manufacturers, chemists, and others . varying degrees, patternscan be produced on waterproof cloth in different colours and shadesof colour, which have a very fine appearance and a characteristiceffect. When it comes to proofing a piece of material with acontinuous pattern, the simplest way would be to imprint thedesign on the rubber-covered roller. Such a roller would, however,be very difficult, if not impossible, to make, for it would have to bedone with extreme accuracy, as an error of ^^^ mm. in printingthe material, if one may so describe the process, would result infaulty places. This can be got over, however, in the followingway:—A piece of cloth of a certain length is coated to a thicknessof 2 nun. with a rubber dough, not too soft. The design is thenimpressed continuously in the rubber coating, and the material i68 RUBBER MANUFACTURE. is vulcanised by heat. Fig. 76 shows the arrangement of thespreading-machine for producing the coloured design on theproofed material, h is the wooden roller carrying the material. Fig. 76. which has been already spread with tlie different-coloured layers ofrubber, c is a similar roller carrying the material on which the^ design in relief has been im- pressed. In printing, the twocloths run, one over the other,between the roller a and thespreading - knife e, the clothwhich is to be printed in colourbeing above that which carriesthe design in relief. After passing over the heating-table eachcloth is rolled up on a separateroller under the machine, inthe usual way. The printedcloth exhibits fine eflfective de-signs in a kind of relief. Theraised parts of the under-clothare subject to greater pressurethan the hollows, and the in-termediate steps are copy reproduces all theand stands out in the plastic
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License: Licensed
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Keywords: ., bookcentury1900, bookdecade1910, bookidmanufactureo, bookyear1919
