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Temperature Compensation for Resistive Ribbon Printing

IP.com Disclosure Number: IPCOM000044468D
Original Publication Date: 1984-Dec-01
Included in the Prior Art Database: 2005-Feb-06

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Bingham, RE [+details]


In correcting errors in resistive ribbon printing, the distance from print point to peel point of the resistive ribbon is increased as the temperature rises and reduced as the temperature decreases. A distance D between where a thermal print head 1 causes a resistive ribbon to engage a sheet 2 of paper on a platen 3 and where a roller 4 engages the resistive ribbon is varied in accordance with the temperature. The roller 4 is mounted on a presser foot 5, which is pivotally mounted on a bracket 6 by a pivot pin 7. The bracket 6 is pivotally mounted on a carrier by a pivot pin 8. A bimetallic strip 9, which has one end attached to the bracket 6 and its other end fixed to the carrier, expands when the temperature increases to shift the pivot pin 7 to the left to increase the distance D.