EP0027698A2
Expired / Lapsed
EP
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Method of producing paper or coated paper carrying an unobtrusive image
Assignee: Wiggins Teape Group Ltd
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Filing: 1980-10-06
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Granted: —
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Expires: 2000-10-06
Abstract
Abstract An unobtrusive image is applied to paper or other sheet material by means of a charged droplet printer, for example an ink jet printer. The unobtrusive image applied may perform the function usually associated with a watermark in paper, but in contrast to a watermark, may be applied to papers during their production on high speed wide deckle machines or to coated papers. The method is particularly suitable for unobtrusively imaging pressure sensitive copying material.
Inventors
- 👤 Martin Allan Riley
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 11:20
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M3/00; B41M3/10; B41M5/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
11 words
Sheet material carrying an unobtrusive image applied by charged droplet printing.
Claim 2
Dependent Claim
11 words
Sheet material carrying an unobtrusive image applied by charged droplet printing.
Claim 3
Dependent Claim
16 words
Sheet material as claimed in claim 1, wherein the unobtrusive image is applied by ink-jet printing.
Claim 4
Dependent Claim
15 words
Sheet material as claimed in claim 1 or 2, wherein the sheet material is paper.
Claim 5
Dependent Claim
16 words
Sheet material as claimed in any preceding claim wherein the sheet material is pressure-sensitive copying material.
Claim 6
Independent Claim
28 words
A method of producing sheet material carrying an unobtrusive image, comprising the step of applying the image to the sheet material by means of a charged droplet printer.
Claim 7
Independent Claim
28 words
A method of producing sheet material carrying an unobtrusive image, comprising the step of applying the image to the sheet material by means of a charged droplet printer.
Claim 8
Dependent Claim
22 words
A method as claimed in claim 5, wherein the image is applied to the sheet material by means of an ink-jet printer.
Claim 9
Dependent Claim
55 words
A method as claimed in claim 5 or 6 wherein the sheet material is a web of paper or coated paper and the printer is mounted on the paper-making or paper-coating machine on which the web is produced, whereby the web speed through the printer is the same as the web speed through the machine.
References Cited (Backward Citations)
No citation records indexed.
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