Browse Prior Art Database

Detentable Ribbon Shield

IP.com Disclosure Number: IPCOM000079653D
Original Publication Date: 1973-Aug-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Matuck, GC: AUTHOR [+2]

Abstract

The figure illustrates a shield which is utilized to prevent a ribbon from contacting a document during the transfer of a new ribbon onto a printer or typewriter, which uses a ribbon medium as an ink carrying device. Such printers traditionally have had the problem of smudging the paper occasionally while printing and often while loading, and hence some type of shield is necessary to limit the contact area of the ribbon to the specific area surrounding the impact area. However, ribbon shields previously used have incurred the additional problem that they made insertion of a new ribbon into a small slot between the ribbon guide and the shield somewhat difficult.

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Detentable Ribbon Shield

The figure illustrates a shield which is utilized to prevent a ribbon from contacting a document during the transfer of a new ribbon onto a printer or typewriter, which uses a ribbon medium as an ink carrying device. Such printers traditionally have had the problem of smudging the paper occasionally while printing and often while loading, and hence some type of shield is necessary to limit the contact area of the ribbon to the specific area surrounding the impact area. However, ribbon shields previously used have incurred the additional problem that they made insertion of a new ribbon into a small slot between the ribbon guide and the shield somewhat difficult.

Illustrated is a method of detenting the shield out of the way when the ribbon is to be inserted, which alleviates this problem to a significant degree. Ribbon shield 1 is shown in its operating position and also in its ribbon loading position. In the operating position, identified by the arrow and label, an aperture in the shield immediately adjacent the area of the print head allows the impact members to push the ribbon through the aperture in the shield and against the document.

During the loading of the ribbon, flexible shield 1 is deformed by pushing on one end of it, illustrated by the arrow identifying the shield in the loading position. The outward bowing of shield 1 provides additional clearance for easier insertion of the inked ribbon through the guides, while at the same...