5 Matching Annotations
- Jul 2025
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www.paymastercheckwriter.com www.paymastercheckwriter.com
- Mar 2025
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Local file Local file
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A furtherrefinementinmaking two-colourribbonsisthe useofacentreliningmachine, which automatically drawsathininsulatinglineon theribbon.A transparentgumsolutionispumpedbyairpressure througha stainless needle whichpreventsthecolours from running.
Center lining machines are used to make bichrome typewriter ribbon. It operates by drawing an insulating line on the ribbon and transparent gum solution is pumped through a needle using pneumatic pressure to keep the two colors from running into each other.
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Theinkisusually appliedhot, the inktroughsbeing heatedbyhot water,ste,orelectricity;insome machinesoil-jacketedinkductsareused.
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The pigmentisfrequentlymadeintoapastewithpetroleumjellyoraheavymineraloil,andanaturalorsyntheticwax;thesolublecolour,dissolvedinoleicacid,being thenmixedwiththepasteandthewholethengroundthoroughlyon«three-rollmill.
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Theribbonmaybe:(a)impregnatedthroughout,(b)surfacetreated,(c)inkedonesideonly,or (d)inkedonbothsidessimultaneously.
Typewriter ribbon can be inked in four different configurations: - impregnated throughout - surface treatment - inked on one side only - inked on both sides, usually simultaneously
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