Browse Prior Art Database

Smart Feed Feature With Page-Wide R2T2 Ribbon

IP.com Disclosure Number: IPCOM000101794D
Original Publication Date: 1990-Sep-01
Included in the Prior Art Database: 2005-Mar-16
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Marefat, M: AUTHOR [+3]

Abstract

The drawing shows a Low Energy Electro Printing mechanism utilizing page-wide ribbon employed in Resistive Ribbon Thermal Transfer printing, similar to the IBM Quietwriter* III printer. Disclosed is a Smart Feed Feature (SFF) which exploits the ribbon feed mechanism to reduce the supplies cost of printing.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 93% of the total text.

Smart Feed Feature With Page-Wide R2T2 Ribbon

       The drawing shows a Low Energy Electro Printing mechanism
utilizing page-wide ribbon employed in Resistive Ribbon Thermal
Transfer printing, similar to the IBM Quietwriter* III printer.
Disclosed is a Smart Feed Feature (SFF) which exploits the ribbon
feed mechanism to reduce the supplies cost of printing.

      Fig. 1 is a schematic representation of the printer hardware.
The page-wide ribbon is fed and spooled independently of the paper.
The ribbon feed motor, under microprocessor control, can run or stop
at any time during the printing process.

      Typically printed material contains large non-written areas,
such as page boundaries and areas between paragraphs. When these
areas make up completely blank rasters, parallel to the print head,
ribbon waste can be prevented by a smart ribbon feed algorithm.

      Practical implementation of SFF utilizes look-ahead memory to
detect upcoming blank rasters.  When a pre-programmed blank area is
encountered, the ribbon motor is stopped.  The motor starts again,
ahead of the next upcoming raster, allowing sufficient time for the
ribbon to reach print velocity (Fig. 2).  Depending on the printed
material, SFF can save over 50% of the ribbon used in an application.

      The print-head and paper movement mechanisms are not affected
by the SFF.  Because of paper abrasion, some ink will transfer from
the stationary ribbon to the moving paper.  However,...