Browse Prior Art Database

Ribbon Processing for Reduced Smudge

IP.com Disclosure Number: IPCOM000107228D
Original Publication Date: 1992-Jan-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 1 page(s) / 48K

Publishing Venue

IBM

Related People

Helinski, EF: AUTHOR

Abstract

A method of processing polyester film ribbon is described which results in the elimination of ribbon smudge on high speed impact printers.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 90% of the total text.

Ribbon Processing for Reduced Smudge

      A method of processing polyester film ribbon is described which
results in the elimination of ribbon smudge on high speed impact
printers.

      The current method of producing polyester film ribbon consists
of the application of a specially formulated ink to one side of a
polyester film.

      When the ink dries, it shrinks and results in the curled ribbon
condition shown in Figure 1.  Figure 1 also shows a print hammer (1),
print forms (2), ribbon (3) and a print band (4) which would be
supported by a platen (not shown).

      This curl is described as forward curl and results in a
condition known as ribbon edge smudge which is due to the force and
motion of the inked ribbon edge (5) rubbing against the printed forms
(2).  It has been shown that the reversal of the described ribbon
curl eliminates the ribbon edge smudge and produces very
significantly improved overall print quality.

      This reversed curl condition with the ribbon curved away from
the paper is shown in Figure 2 and can be produced by spooling the
ribbon (3) under tension while applying force against the ribbon (3)
using a contoured edge tool (6).  Figure 3 describes this processing
using edge tooling which can be made using a slowly rotating disc (6)
having the proper diameter.  The disc has a relatively sharp edge (7)
and rotates very slowly to distribute the edge wear over a broader
area, hence increasing the useful life of the dis...