B - Operations – Transporting – 41 – J
Patent
B - Operations, Transporting
41
J
101/43
B41J 31/02 (2006.01) B41J 31/05 (2006.01) B41M 5/26 (2006.01)
Patent
CA 1155333
A RIBBON CONFIGURATION FOR RESISTIVE RIBBON THERMAL TRANSFER PRINTING Abstract of the Disclosure A resistive ribbon thermal transfer printing apparatus has an improved ribbon configuration. The ribbon contains a two-ply resistive element positioned on a conductive layer. The resistive element contains a top layer having a low resistance, for example 3x10-5.OMEGA. for making contact with the writing head and a bottom layer having a higher resistance, for example 1x10-3.OMEGA. in contact with the conductive layer for generating heat. The ratio of the resistance of the high resistance layer to the resistance of the low resistance layer, RH/RL, is 1.1 to 1000. An example of such a ribbon contains a top resistive layer of polyimide containing 35% conductive carbon, a bottom resistive layer of a SiO/Cr cermet (60%/40%), a stainless steel conductive layer and a Versamid ink layer. Versamid is a trade mark used to identify a linear polyimide having the following properties: melting point of 105°C to 115°C and a melt index at 150°C of 20 to 30 poise. SA9-79-023
362579
Chang Leo S.
de More Anthony
International Business Machines Corporation
Rosen Arnold
LandOfFree
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