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Consumer-document-inking-monitor-and-control

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Consumer-document inking monitor and control

Details

Inventors: Tognazzini, Bruce;
Assignee: Sun Microsystems, Inc. (Palo Alto, CA)
Primary Examiner: Powell; Mark R.
Assistant Examiner: Sealey; Lance W.
Attorney, Agent or Firm: McDermott, Will & Emery

In a printer, periodic testing of printer ink density occurs once the number of print operations exceeds a particular threshold. The threshold is either determined from use or from statistics which summarize the performance of a particular manufacturer and ink supply. Testing results are reported to a maintenance facility and to an MIS application over a network or over a point to point link. Local warnings may be given that the ink supply is low and double printing may be used to darken the printed product until the ink supply is changed.

DETAILED DESCRIPTION I claim: 1.
Printing apparatus comprising: a.
a computer processor having a communications port; b.
a printer connected to said computer processor; c.
a network; and d.
an ink density detector connected to said computer processor and activated thereby to sample density of ink deposited on a print medium during a printing operation, said computer processor configured to report abnormal ink density to a management information system which records the fact that an ink supply is low and orders the appropriate supplies.
2.
Apparatus of claim 1 in which the ink density detector comprises a light source and a photodetector.
3.
Apparatus of claim 2 in which the ink density detector further comprises a columnator.
4.
Apparatus of claim 1 in which the printing apparatus further comprises one of a transmitter or a modem for notifying at least one of remotely located personnel or a remotely locate process when ink density is unsatisfactory.
5.
Apparatus of claim 1 in which the printing apparatus further comprises a control element configured to cause at least double printing of each character when ink density is unsatisfactory.
6.
Apparatus of claim 1 in which the printing apparatus further comprises a control element configured to activate a warning indicator when ink density is unsatisfactory.
7.
Apparatus of claim 1 in which the printing apparatus further comprises a control element configured to automatically change an ink supply.
8.
A method of monitoring the quality of the product produced during printing comprising the steps of: a.
sampling density of ink deposited on a print medium during a printing operation only after a number of print operations equals or exceeds a predictive threshold; b.
recording the fact that an ink supply is low and orders the appropriate supplies.
9.
The apparatus of claim 1 in which sampling density of ink begins when a number of print operations equals or exceeds a predictive threshold.
10.
The method of claim 8 further comprising the step of: b

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