Browse Prior Art Database

Fabric Ribbon Re-Inking Mechanism

IP.com Disclosure Number: IPCOM000119881D
Original Publication Date: 1991-Mar-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 1 page(s) / 41K

Publishing Venue

IBM

Related People

DeCoste, CL: AUTHOR [+3]

Abstract

Disclosed is a re-inking mechanism for a fabric printer ribbon cartridge that eliminates the permanent set of the re-inking roll with fewer parts than previous designs.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Fabric Ribbon Re-Inking Mechanism

      Disclosed is a re-inking mechanism for a fabric printer
ribbon cartridge that eliminates the permanent set of the re-inking
roll with fewer parts than previous designs.

      Fabric printer ribbon re-inking rolls are typically made from
porous thermoplastic materials that can become permanently deformed
when a rigid part, such as an ink transfer roll, is pressed against
it.  This deformation can be excessive when the assembly is exposed
to high temperatures over a period of time, which is not uncommon
during shipping and storage.  This problem has previously been solved
by a design that incorporated a unique bearing post design to relieve
the pressure of the transfer roll against the ink roll by allowing
the transfer roll to move away when the ribbon is not in tension from
the ribbon drive mechanism of the printer [*].

      The disclosed design, shown in the figure, utilizes the same
bearing as (*), but relies on the ribbon tension and the
compression-deflection properties of the ink roll to furnish the
required force between the ink roll and transfer roll to drive the
mechanism.  This allows for the ink roll to be mounted on a fixed
post, eliminating the need for a pivot spring and associated parts.

      Reference
(*) U.S. Patent 4,913,571.