Paul L Jeran

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Paul L Jeran

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Cartridge can be tested at any point within the operating range of the ... Allow for the possibility of cartridge shaking. Fade determination quick and simple ... – PowerPoint PPT presentation

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Title: Paul L Jeran

1
Paul L Jeran Hewlett-Packard Company Editor
ISO/IEC JTC1 SC28 19752
Method for the determination of toner cartridge
yield for monochromatic electrophotographic
printers and multi-function devices that may
contain printer components
2
Why is a standard needed?

Allows comparisons of products
Product yield in the same market segment can be
compared without concern that the numbers do not
compare
Setting of design goals
During product design, goals can be specified
and performance tested
Calculation of total cost of ownership
For all-in-one monochrome printers, cost of
toner is a major contributor to the overall cost
of ownership
Marketing specifications
Use of common specifications gives the customer
a number they can trust when making a purchase
decision

3
History

European Printer Manufacturers and Importers
(EPMI)
ISO/IEC 10561 (Dr. Grauert) - Method for
measuring throughput Class 1 and Class 2
printers
Defined a standard test page
All Courier font, low page coverage, but defined
Fade is not quantified.
You know it when you see it
Environmental conditions loosely defined
30-70 RH Can have a significant effect on
yield

4
History

Standard Test Method Committee (STMC)
ASTM F1856 Standard Practice for Determining
Toner Usage for Printer Cartridges
Output coverage defined
Input file edited to print at 5 coverage. Does
not represent customer usage
End of Life estimated
Cartridge life estimated by weight of toner
available
Environmental conditions not defined
Cartridge can be tested at any point within the
operating range of the printer
Sample size
Sample size not specified

5
ISO/IEC JTC1 SC28 Approach

Standard development goals
Unbiased testing
Customer based test file
Simple to evaluate
Statically significant results
Allow different cartridges printers to be
compared

6
ISO/IEC JTC1 SC28 Approach

Print Environment
Must be controlled to minimize effect on yield

7
ISO/IEC JTC1 SC28 Approach

Print Environment
From the ISO/IEC FCD 19752
Temperature Testing room average 23.0C /-2C
Readings to be made with a running average of 1
hour with readings recorded at least every 15
minutes, all running average temperatures are to
be between 20.0C and 26.0C.
Relative Humidity Testing room average 50
/-10 RH
Readings to be made with a running average of 1
hour with readings recorded at least every 15
minutes, all running average RHs are to be
between 35 and 65.

8
ISO/IEC JTC1 SC28 Approach

Test page printing
Format for intra OS compatibility
Sized for A4 or Letter printing
Features placed for end of life determination
Represents a standard consumer type document

9
ISO/IEC JTC1 SC28 Approach
10
ISO/IEC JTC1 SC28 Approach

End of Life
Use actual measurement of cartridge yield, run
cartridge to fade condition
Allow for the possibility of cartridge shaking
Fade determination quick and simple
Fade defined as a 3mm break in the upper and
lower lines of text around the page

11
ISO/IEC JTC1 SC28 Approach

End of Life

3mm gap
(See poster for better illustration)
12
ISO/IEC JTC1 SC28 Approach

Sample size Statistics
From the ISO/IEC FCD 19752
Minimum sample size
3 Engines and 3 cartridges/engine (9 Cartridges
total) Compromise between reduction in variation
an economics of testing.
Additional engines and cartridges can be tested
as long as an equal number of cartridges is
tested on each engine. Allows large
manufacturers better estimate variation.
Use 90 lower confidence bound as the reported
value

13
ISO/IEC JTC1 SC28 Approach

Sample size Statistics

14
Future Work

Standard for color yield test suite
Standard for measuring Color electro-
photographic consumable yield
Standard for measuring color ink jet consumable
yield

15
Membership
ISO/IEC JTC1 SC28 Members Austria Brazil China Ger
many Italy Japan Korea Netherlands Poland Philippi
nes Romania Slovenia Thailand Uruguay USA

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