Browse Prior Art Database

Improved, Low-Cost Ribbon for Quietwriter

IP.com Disclosure Number: IPCOM000102085D
Original Publication Date: 1990-Oct-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 2 page(s) / 69K

Publishing Venue

IBM

Related People

Afzali-Ardakani, A: AUTHOR [+4]

Abstract

Disclosed is a new structure for the QUIETWRITER* printer ribbon. The ribbon is made by coating a thin resistive layer on an aluminized polyester support. The cost of the ribbon and, therefore, the printing cost may be reduced to half the cost of the standard ribbon. The reduction in the cost of the ribbon along with ribbon saving features already present in QUIETWRITER III makes this technology more competetive with other printing technologies, especially direct thermal transfer and EP printing.

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Improved, Low-Cost Ribbon for Quietwriter

       Disclosed is a new structure for the QUIETWRITER* printer
ribbon. The ribbon is made by coating a thin resistive layer on an
aluminized polyester support. The cost of the ribbon and, therefore,
the printing cost may be reduced to half the cost of the standard
ribbon. The reduction in the cost of the ribbon along with ribbon
saving features already present in QUIETWRITER III makes this
technology more competetive with other printing technologies,
especially direct thermal transfer and EP printing.

      The resistive ribbon used in the IBM QUIETWRITER printer is
made by fabricating a relatively thick (15-20 micron)
polycarbonate/carbon powder composite which is aluminized and then
coated with an ink layer (Fig. I).  A major portion of the cost of
the ribbon is related to the manufacturing of the resistive layer
which is made by dispersion of carbon powder in methylene chloride
solution of polycarbonate, coating of this dispersion on a substrate,
and finally delamination of the resist layer from the substrate. The
thick resistive layer also acts as a support layer for the aluminum
film and the ink layer. In this invention we disclose an alternative
resistive ribbon with a dielectric support layer. A thin (3.5-6
micron) film of polyethylenetrephthalate (PET) is coated with
aluminum (500-1000 A) by vacuum evaporation. Then, the aluminum side
is coated (2-5 micron thick) with a dispersion of conductive
particles (carbon...