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Roller Arrangement for Obtaining Slack Ribbon in a Printer

IP.com Disclosure Number: IPCOM000038968D
Original Publication Date: 1987-Mar-01
Included in the Prior Art Database: 2005-Feb-01

Publishing Venue

IBM

Related People

Authors:
Rachui, RA Thompson, DL Wilmoth, TL [+details]

Abstract

A method of achieving a slack ribbon condition in a QuietWriter-type printer when the print head hits the platen is described. The QuietWriter-type printer has a ribbon pinch brake arm mechanism 1 on the carrier to assure that the ribbon 2 is taut as it passes across the secondary ground shoe at the print head. This taut ribbon condition is necessary to obtain an adequate electrical ground path from the ribbon during printing. The arrangement is illustrated diagrammatically in Fig. 1. However, with a free-to-pivot elongated crown roller 4 on a guide post 3, slack can be generated in the ribbon at the time the head is brought into contact with the platen. As shown in Fig. 2, the ribbon 2, at rest, is located on the summit S of the roller 4.