EP0806706A1 - Verbesserungen bezüglich Anti-Photokopiermassnahmen - Google Patents

Verbesserungen bezüglich Anti-Photokopiermassnahmen Download PDF

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Publication number
EP0806706A1
EP0806706A1 EP97303162A EP97303162A EP0806706A1 EP 0806706 A1 EP0806706 A1 EP 0806706A1 EP 97303162 A EP97303162 A EP 97303162A EP 97303162 A EP97303162 A EP 97303162A EP 0806706 A1 EP0806706 A1 EP 0806706A1
Authority
EP
European Patent Office
Prior art keywords
dots
region
area
article
tint
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP97303162A
Other languages
English (en)
French (fr)
Inventor
Peter Evans
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kalamazoo Computer Group PLC
Original Assignee
Kalamazoo Computer Group PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kalamazoo Computer Group PLC filed Critical Kalamazoo Computer Group PLC
Publication of EP0806706A1 publication Critical patent/EP0806706A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B41M3/146—Security printing using a non human-readable pattern which becomes visible on reproduction, e.g. a void mark
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/08—Photoprinting; Processes and means for preventing photoprinting
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/04—Preventing copies being made of an original
    • G03G21/043—Preventing copies being made of an original by using an original which is not reproducible or only reproducible with a different appearence, e.g. originals with a photochromic layer or a colour background

Definitions

  • This invention relates to anti-photocopying measures, and especially, but not exclusively, paper and paper articles that have anti-photocopying security areas provided on them.
  • the photocopier When this patterned region is photocopied the photocopier is misled by the pattern: it reproduces according to its resolution capacity and the combination of the hidden security marking overlaid with the pattern is strongly reproduced, whereas the masking pattern alone, away from the hidden security marking, is less strongly reproduced. This causes the photocopy to show the security marking prominently.
  • the invention comprises a method of providing an anti-photocopying mark or area on an article such that when the article is photocopied a hidden security marking is visible on the copy, the method comprising providing the mark or area as a tint by having a first region made of dots, and a second region made of dots, and ensuring that the dots of the first region are large enough and dark enough to be above a resolution threshold of a photocopier and that the dots of the second region are below the resolution threshold of the photocopier, so that when photocopied the first region has more prominence to the eye in the copy than it did in the original article, the method comprising ensuring that the dots of the first and second regions are arranged such that when the mark or area is looked at with the naked eye at arms length the mark or area appears at a casual glance to be a plain or flat tint, instead of appearing to be a patterned area.
  • Providing a security area/marking as a tinted area rather than as a box which appears to the usual eye as a blotchy pattern is more attractive and more acceptable in some areas of use.
  • An area of blotchy pattern on an article, as a security device, can detract substantially from the overall eye appeal of the article.
  • Providing an area of flat tint is less eye-catching, and does not affect the overall visual appearance of the original article so much. This is especially so if the entire surface, or an entire information/presentation panel of the article is so "tinted".
  • the method comprises providing the article with a surface, or display panel, which is substantially entirely covered with the tint (comprising first and second regions).
  • the method further comprises applying additional visual markings over the tint (e.g. writing, or pictures, or both).
  • additional visual markings e.g. writing, or pictures, or both.
  • the tint is less eye-catching than a patterned area we can use the tint area to perform information - presenting functions as well as be a security feature (which is difficult/not possible with a heavy pattern).
  • the dots of the first and/or second region are uniformly spaced from other similar dots of their region.
  • the method comprises using dots in the first region of a different size from those of the second region.
  • the dots of the first region may have a line screen of between 55-75 line screen preferably between 60-70 line screen and, most preferably about 65 line screen (or about 62, 63, 64, 66, 67, 68).
  • the dots of the first region cover between 10% to 20% of the area of the first region, most preferably about 13% (or 11, 12, 14, 15 or 16%).
  • the dots of the second region may have a line screen of between 120-150, preferably between 125 to 135 and most preferably about 130, (or 120, 125, 135 or 140).
  • the dots of the second region cover between 6% to 12% of the area of the first region, most preferably about 9% (or 7, 8, 10 or 11%).
  • the ratio of line screen of the dots of the first region to those of the second region is about 1:2.
  • the ratio of the area of the first region covered by dots (as opposed to the area of space between first region dots) to the area of the second region covered by dots (as opposed to the area of space between second region dots) is about 4:3.
  • the screen angle of the first region dots is different from that of the second region dots.
  • the difference in first and second region dot screen angles is at least 20°, or at least 30°. It may be in the range 30-60°, and most preferably about 45° different.
  • the screen angle of one of the first or second region dots may be about 90°, and the screen angle of the other of the first or second region dots may be about 45°.
  • a photocopiable article having at least an area of tint, the tint area comprising one or more first regions of first dots and one or more second regions of second dots, the first and second regions appearing to a casual observer, with the article at arms length, as a plain tint area without any masking pattern being seen, and the first and second regions of dots being such that when the article is photocopied the dots are capable of having one set of dots below the resolution capacity of a photocopier that is used and the other set of dots above the resolution capacity, so that the copy has anti-photocopy indicia made visible on it.
  • the article is a sheet of paper.
  • the tint area may extend over a substantial part of the area of the paper, for example over 30% or 50% or more of the area.
  • the tint area extends over the entire area, or substantially the whole area, of the sheet of paper.
  • the sheet of paper may carry other markings, such as writing/typing.
  • the article may be an entrance ticket, a voucher, a certificate, a cheque, a letter, or the like. It could be continuous stationery.
  • the invention is also applicable to NCR paper, e.g. the upper sheet, or a lower sheet, or both.
  • the invention comprises the use of dots of one size and/or spacing and dots of another size and/or spacing, above and below the resolution capacity of a photocopier, to prevent that photocopier from producing a faithful copy of an original article that carries the dots, the dots being arranged such that when the area is viewed by a casual observer at arms length they are not individually readily discernible, instead the dots forming an area which appears to have a tint.
  • a sheet of "white” paper 1 is shown in Figure 1.
  • it is A4 paper, but it could be any size. It has a pale blue/grey tint on one side of it. The tint is not really very noticeable unless it is placed next to a truly white paper.
  • the tint is caused by the upper surface of the sheet of paper being covered, in its entirety, by small discrete dots.
  • the dots are provided in two kinds of regions best shown in Figure 3: anti-photocopy marking regions 2, and background tint regions 3. The dots of the regions 2 and 3 are different.
  • the dots, referenced 4, of the anti-photocopying marking regions 2 are of 65 line screen ( 65 dots per inch in a horizontal row of them) and have 13% of the total area of the regions 2 covered in dot (and 87% space between dots).
  • the dots 4 are discrete dots and have a screen angle of 45° (illustrated by schematic screen angle representation 5 shown on Figure 3). It will be appreciated that the line screen of a matrix of dots is the same in two perpendicular directions - i.e. they have a square pattern matrix.
  • the dots, reference 6, of the tint regions 3 are of 130 line screen (dots per inch in a horizontal row of them) and have 9% area cover of the total area of the regions 3 (and 91% of the area as space between discrete dots).
  • the dots 6 have a screen angle of 90° (illustrated by schematic screen angle representation 7 shown in Figure 3).
  • the dots 4 and 6 are printed with the same inks, usually in the same printing operation.
  • the anti-photocopy marking regions 2 spell out the word "COPY", which is repeated across the surface of the sheet 1.
  • the dots 6 are below the resolution capacity of the photocopier and are not seen by the photocopier, and not copied (or are of such small resolution that the photocopier works imperfectly at that resolution and the dots 6 are not copied properly).
  • the dots 4 are above the resolution capacity of the photocopier and are substantially reproduced.
  • Standard typeface when typed or printed, onto the sheet 1 is legible at a normal reading distance, without the background tint effect of the paper, or the security markings, substantially affecting its legibility. Indeed, with something recognisable for the eye to follow (e.g. words or letters, or a picture) presented on the sheet the regions 2 may be even less noticeable than they are with a blank sheet. This might be because the eye is distracted.
  • the sheet 1 can be used for normal letter writing.
  • regions 2 and 3 between them extend over the entire surface of one side of the sheet 1. They may also extend over the reverse side of the sheet. There may be only one region 2 on any one side of the sheet.
  • Figures 4 and 5 show an original entrance ticket 10 (e.g. ticket to a sporting event or concert) and a photocopy respectively.
  • an original entrance ticket 10 e.g. ticket to a sporting event or concert
  • a photocopy respectively.
  • the ticket 10 can be printed on paper similar to that of Figure 1. We may provide the paper and let the customer do their own overprinting 11 (with printing presses, or with laserjet, bubblejet etc printers), or we may provide the finished ticket. When the ticket is copied security markings become visible in the copy.
  • the feature of different batches of tickets may be used to trace the source of original tickets. This could be helpful to stop, for example, ticket touts (or more accurately to identify the people who sell the tickets to ticket touts) by looking at a copy of a ticket.
  • the hidden coding of a batch of tickets need not be easily noticed by a casual observer.
  • the anti-photocopying marking can in some cases (e.g. when trying to catch forgers) be made far less noticeable than those shown in the drawings so that the forger might not notice that the copy is not really a faithful copy but has an alteration (e.g. an additional marking, possibly quite a discrete marking) which can be looked for specifically when trying to trace forgeries.
  • Figure 6 shows a magnified dot pattern of another anti-photocopying marking.
  • the anti-photocopy, large dot, regions are referenced 20, and the background tint, small dot, regions are referenced 21.
  • the same line screen, dot sizes, and screen angles are used as in the arrangement of Figure 3.
  • the dots of the first and second regions can be interchanged, in which case the security marking will appear in a photocopy as white marks on a dark background.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Printing Methods (AREA)
  • Credit Cards Or The Like (AREA)
EP97303162A 1996-05-10 1997-05-09 Verbesserungen bezüglich Anti-Photokopiermassnahmen Withdrawn EP0806706A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9609826.4A GB9609826D0 (en) 1996-05-10 1996-05-10 Improvements in and relating to anti-photocopying measures
GB9609826 1996-05-10

Publications (1)

Publication Number Publication Date
EP0806706A1 true EP0806706A1 (de) 1997-11-12

Family

ID=10793516

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97303162A Withdrawn EP0806706A1 (de) 1996-05-10 1997-05-09 Verbesserungen bezüglich Anti-Photokopiermassnahmen

Country Status (2)

Country Link
EP (1) EP0806706A1 (de)
GB (2) GB9609826D0 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999012742A1 (en) * 1997-09-08 1999-03-18 The House Of Questa Ltd. Improved security printing method for printing secure documents
WO2001087632A1 (en) * 2000-05-17 2001-11-22 Ascent Systems Software Limited Security printing
EP2392466A1 (de) * 2010-06-03 2011-12-07 Konica Minolta Business Technologies, Inc. Hintergrundmusterbildkombinationsvorrichtung, Hintergrundmuster-Bildkombinationsverfahren und computerlesbares Speichermedium für Computerprogramm

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6725346B1 (en) * 2000-04-04 2004-04-20 Motorola, Inc. Method and apparatus for overlaying memory in a data processing system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4175774A (en) * 1978-03-23 1979-11-27 American Standard Inc. Non-copying printed document and method of printing same
US4351547A (en) * 1979-10-11 1982-09-28 Burroughs Corporation Security document and method for making same using an alternating dot pattern
US5171040A (en) * 1991-03-29 1992-12-15 Invisible Images, Inc. Copy-invalidating document
EP0522827A1 (de) * 1991-07-12 1993-01-13 The Standard Register Company Sicherheitsdokument mit variierender Tönung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4265469A (en) * 1977-05-18 1981-05-05 Burroughs Corporation Protected document and method of making same
US4341404A (en) * 1980-02-11 1982-07-27 Burroughs Corporation Security document using a variable dot screen
US4579370A (en) * 1982-09-10 1986-04-01 Burroughs Corporation Multi-tone cancellation phrase and background
US5149140A (en) * 1991-03-11 1992-09-22 The Standard Register Company Security, information document
US5340159A (en) * 1991-07-12 1994-08-23 The Standard Register Company Varying tone security document
GB2262065A (en) * 1991-12-07 1993-06-09 Moore Business Forms Inc Security printed document resistant to xerographic copying.
US6039357A (en) * 1992-01-08 2000-03-21 Moore North America, Inc. Security bands to prevent counterfeiting with color copies
GB9400942D0 (en) * 1994-01-19 1994-03-16 De La Rue Thomas & Co Ltd Copy indicating security device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4175774A (en) * 1978-03-23 1979-11-27 American Standard Inc. Non-copying printed document and method of printing same
US4175774B1 (de) * 1978-03-23 1987-04-28
US4351547A (en) * 1979-10-11 1982-09-28 Burroughs Corporation Security document and method for making same using an alternating dot pattern
US5171040A (en) * 1991-03-29 1992-12-15 Invisible Images, Inc. Copy-invalidating document
EP0522827A1 (de) * 1991-07-12 1993-01-13 The Standard Register Company Sicherheitsdokument mit variierender Tönung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999012742A1 (en) * 1997-09-08 1999-03-18 The House Of Questa Ltd. Improved security printing method for printing secure documents
WO2001087632A1 (en) * 2000-05-17 2001-11-22 Ascent Systems Software Limited Security printing
EP2392466A1 (de) * 2010-06-03 2011-12-07 Konica Minolta Business Technologies, Inc. Hintergrundmusterbildkombinationsvorrichtung, Hintergrundmuster-Bildkombinationsverfahren und computerlesbares Speichermedium für Computerprogramm
US9085191B2 (en) 2010-06-03 2015-07-21 Konica Minolta, Inc. Background pattern image combining apparatus, background pattern image combining method, and computer-readable storage medium for computer program

Also Published As

Publication number Publication date
GB2312872A (en) 1997-11-12
GB9609826D0 (en) 1996-07-17
GB9709318D0 (en) 1997-06-25

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