Browse Prior Art Database

Ribbon Retainer

IP.com Disclosure Number: IPCOM000086009D
Original Publication Date: 1976-Jul-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Bonafino, EJ: AUTHOR [+4]

Abstract

The tendency for in or out-folds of multiple-part forms to drag the ink ribbon with the forms during advancement of the forms in a line printer can be counteracted, by providing a shield which both protects the ribbon and retains it in its normal path by distorting the ribbon an amount proportional to the forms thickness.

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Ribbon Retainer

The tendency for in or out-folds of multiple-part forms to drag the ink ribbon with the forms during advancement of the forms in a line printer can be counteracted, by providing a shield which both protects the ribbon and retains it in its normal path by distorting the ribbon an amount proportional to the forms thickness.

In the figure, a type belt 1 having characters 2 and timing marks 3 is moved along the face of platen 4. An ink ribbon 5 is supported adjacent the type belt 1. Forms 6 to be printed are supported along guides 7 over print hammer 8. A relatively rigid back shield 9 is interposed between the timing marks 3 and ribbon 5, and a front shield 10 of flexible material covers the bottom portion of ribbon 5. The front shield 10 is formed with a lip 11 to push the ribbon 5 toward the type belt 1 an amount determined by the thickness of the forms 6. The deformation of the ribbon 5 caused by the front shield 10 distorts the ribbon, and creates sufficient vertical drag to prevent the forms 6 from pulling the ribbon 5 upward as forms are moved.

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