WO1995005285A1 - Procede d'impression, materiau imprime selon ce procede, et procede de production d'un materiau imprime - Google Patents

Procede d'impression, materiau imprime selon ce procede, et procede de production d'un materiau imprime Download PDF

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Publication number
WO1995005285A1
WO1995005285A1 PCT/SE1994/000672 SE9400672W WO9505285A1 WO 1995005285 A1 WO1995005285 A1 WO 1995005285A1 SE 9400672 W SE9400672 W SE 9400672W WO 9505285 A1 WO9505285 A1 WO 9505285A1
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WO
WIPO (PCT)
Prior art keywords
image
printed
printing
masking
elements
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.)
Ceased
Application number
PCT/SE1994/000672
Other languages
English (en)
Inventor
Roger E. Wallis
Robert A. Mackinnon
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.)
Perstorp AB
Original Assignee
Perstorp AB
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 Perstorp AB filed Critical Perstorp AB
Priority to AU73925/94A priority Critical patent/AU7392594A/en
Publication of WO1995005285A1 publication Critical patent/WO1995005285A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for

Definitions

  • the present invention relates to a method of printing designs onto a material such as paper, fabric, mesh or netting and more particularly, to a method of printing a random design having a long repeat length of the pattern.
  • a design which either has a non-repeating pattern, i.e. a random, or a pattern in which the repeating features are wide apart resulting in a pattern having a long design repeat.
  • a non-repeating pattern or a pattern in which the repeating feature are much wider apart than in normal practice is in the production of printed camouflage.
  • a non-repeating pattern, or a pattern with a long repeat length makes visual and electronic recognition of such a design as a camouflage more difficult.
  • the present invention provides a method of printing a composite image on a material.
  • the composite image comprises a two or more identical or different image parts provided by two or more printing elements.
  • Each printing element carries an image part of the composite image to be printed and each image part has it own repeat length.
  • the repeat lengths of the image parts are independently different from each other, whereby each image part is printed at its own repeat length repeatedly onto the material.
  • Embodiments of the present invention involve 4-10, preferably 6-8 printing elements consisting of rotatable print cylinders each having a respective circumference which defines the repeat length of the image part carried thereon. Accordingly, a prin ⁇ ting cylinder circumference of 1.5 metre give a repeat length of 1.5 metre and, similarly, a printing cylinder circumference of 1.1 metre will give a repeat length of 1.1 metre.
  • a printing press is provided with six printing elements each carrying an image part having the respective repeat lengths: 1.5 metre (1st image part), 1.1 metre (2nd), 1.4 metre (3rd), 0.9 metre (4th), 1.3 metre (5th) and 0.85 metre (6th).
  • the repeat lengths for image part combinations are as listed below:
  • the combined repeat length for a printed image embodying above six different repeat lengths is 153153 metres.
  • the repeat length of the overall combined pattern has thus been greatly increased from what would be available from a printing device provided with a conventional single printing element or with a plurality of elements of the same repeat length. It is also evident that additional printing elements will further and proportional to the number and repeat length of the printing elements increase the repeat length of the overall combined pattern.
  • the number of printing elements, the repeat lengths as well as the indivi ⁇ dual location in the printing press can, of cause, be varied.
  • Further embodiments of the method according to the invention involve printing elements consisting of rotatable print cylin ⁇ ders each having a respective circumference which defines the repeat length of the image part carried thereon. Means are suitably provided to drive the print cylinders with matched speeds and to pass material past the cylinders to receive the composite image therefrom.
  • a printed material may be produced, the material carrying a composite image made of a plurality of image parts, the image parts each having different repeat lengths, the repeat lengths of the image parts not being multiples of each other. This imparts a very random effect to the printed composite image. If each image part is a random or quasi random image, such as a camouflage image, the resultant printed image is very random and thus difficult to recognise as camouflage.
  • a printing method comprising transfer means to transfer at least one image from the an image carrying substrate to a mate ⁇ rial to be printed.
  • at least one of the print elements is inked with transfer and/or sublimation dye to provide a printed material working as an image carrying subst ⁇ rate.
  • the composite image is preferably printed on paper using one or more of said dyes and the composite image is transferred from the paper (the transfer paper) to a material, such as paper, cardboard, textiles, fabric, mesh, netting, metal foils or plastic films and foils or the like, and a very long repeat length pattern can, accordingly, be applied directly to the material.
  • a transfer paper printed in one or more transfer and/or sublimation dyes, is together with the material to be printed passed between for instance the exterior of a rotating heated drum or the like and a continuous belt or the like biased against the exterior of the drum.
  • the heated drum vaporises sublimation dye(s) on the transfer paper turning the dyes into gas, which gas transfers to the material thereby providing a mirror image of the pattern on the transfer paper.
  • Embodiments of the present invention including a transfer prin ⁇ ting system, can, furthermore, be provided with feeder means to interpose at random time intervals and/or at random locations one or more masking elements, such as masking sheets, to pre ⁇ vent a portion of the image masked by the masking element to be transferred to the material.
  • the masking elements are interposed between the image carrying substrate and the material to be printed when these pass between for instance the heated drum and the belt of a transfer printing system as disclosed above.
  • the masking elements may be plain or carry an image printed thereon in transfer and/or sublimation dye.
  • Each of the masking elements may be identical, or there may be a plurality of dif ⁇ ferent types of masking elements, for instance may each masking element carry its own image, such as a random or a quasi random camouflage image.
  • Each masking element may have a regular poly ⁇ gon, square, rectangular or triangular shape or the shape may be the same as the shape of the image printed thereon, such as a random or quasi random shape, or may be of a different shape.
  • the masking elements may, as disclosed above, carry images printed in one or more transfer and/or sublimation dyes.
  • a masking element When such a masking element is interposed between a transfer paper and for instance a fabric, the image on the masking element is transferred to the fabric in the area adjacent the masking element rather than the image printed on the transfer paper. This produces a new feature in the printed material which was not present in the image on the transfer paper. Plain masking elements result in corresponding unprinted areas.
  • the feeder means for interposing of masking elements may be computer controlled and the computer is suitably associated with a random number generator. The masking elements can thus be positioned randomly and a truly random image is transferred to the material.
  • the computer can be programmed to interpose masking elements at certain intervals to produce a long repeat, pre-determined image that could not be achieved without using for instance at least one printing cylinder with a circumference of at least 3 metres.
  • a printed material wherein the composite image is a camouflage design has a number of military camouflage applications. It is also envisaged that the material may be produced in wide widths for applications, such as uniforms, camouflage nettings, air strip covers, aircraft and helicopter covers, ship covers, tank covers or similar or other military camouflage purposes. Such a material printed on both sides is reversible and can therefore be used as a camouflage fabric in two contrasting landscapes.
  • a material printed according to the present invention may also be used for production of articles such as decor papers for thermosetting laminates, plastic foils or plastic films, wall ⁇ papers or a wall claddings, carpetings or floor claddings, articles of clothing or decorative textiles.
  • the material to be printed may be paper, cardboard, textiles, fabric, mesh, netting, metal foil, plastic film or foil and the material working as image carrying substrate most suitably consists of paper, cardboard, fabric, textile, mesh or netting.
  • FIG. 1 is a schematic side view of a rotary multi-cylinder printing press set up to produce printed materials according to an embodiment of the method of the present invention.
  • FIG. 2 illustrates a portion of a length of material (paper) printed with an example of a pattern produced by the printing press of Figure 1.
  • FIG. 3 is a diagrammatic side view of a transfer printing device set up to produce printed materials according to an embodiment of the method of the present invention, which embodiment includes an image carrying substrate and masking elements;
  • Figure 4 is a diagrammatic front view of the printing device of Figure 3.
  • FIG. 1 illustrates a schematic version of a gravure printing press 2 set up to embody the method of the present invention.
  • the printing press 2 comprises as print elements four rotating printing cylinders 7A, 7B, 7C, 7D. It can be seen that a supply reel 9 of paper 1 or the like to be printed is fed through the printing press 2 and an image is printed onto the paper 1 by each of the four rotating cylinders 7A, 7B, 7C, 7D. The printed paper 1 is transferred to a second reel 3 for storage. All four printing cylinders 7A, 7B, 7C, 7D have individually different circumferences and are each provided with an engraved or embos ⁇ sed image part.
  • Printing cylinder 7A has the smallest circum ⁇ ference and printing cylinder 7D has the largest circumference, whilst printing cylinders 7B and 7C have different circumferen ⁇ ces between those of printing cylinder 7A and 7B.
  • Ink or dye is applied to each of the printing cylinders 7A, 7B, 7C, 7D by rotating the surface of each cylinder 7A, 7B, 7C, 7D through a respective inking or dyeing reservoir 4A, 4B, 4C, 4D such that the entire surface of the printing cylinder 7A, 7B, 7C, 7D is covered with ink or dye.
  • ink or dye may be applied to the prin ⁇ ting cylinders 7A, 7B, 7C, 7D by for instance inking rollers.
  • the paper 1 provided from the supply reel 9 is sandwiched bet ⁇ ween the first printing cylinder 7A and an impression cylinder 6A and is pulled through the nip between the two cylinders 7A and 6A by the rotation of the printing cylinder 7A.
  • the pres ⁇ sure between the impression cylinder 6A and the printing cylin ⁇ der 7A causes the image part engraved on the printing cylinder 7A to be printed onto the paper 1.
  • the image of each of the printing cylinders 7B, 7C, 7D is similarly applied, in turn, to the paper 1 as it passes through each pair of printing cylin ⁇ ders 7B, 7C, 7D and their respective impression cylinders 6B, 6C, 6D so that a composite image is produced.
  • a variable drive is provided to rotate each of the printing cylinders 7A, 7B, 7C, 7D at a matched printing cylinder surface speed so that the paper 1 is drawn through each of the cylinder pairs at the same speed.
  • each cylinder has a different so called repeat length which is equivalent to the respective circumference of each of the printing cylinders 7A, 7B, 7C, 7D.
  • FIG. 2 illustrates a schematic example of a length of paper 1 which has been printed by a printing press 2 equivalent to that of Figure 1.
  • the width of the paper 1 is illustrated as being divided into four equal longitudinal strips 1A, IB, 1C, ID, each of which has been printed on by a separate one of the four printing cylinders 7A, 7B, 7C, 7D.
  • each of the printing cylinders 7A, 7B, 7C, 7D normally prints the respective image part across the entire width or a selected width of the paper 1 as appropriate.
  • the transfer paper 10 comes into contact with the heated surface of the drum 12.
  • the drum 12 and the belt 15 force the transfer paper 10 and the fabric 11 into contact with one another.
  • the heated drum 12 vaporises the sub ⁇ limation or transfer dye(s) on the transfer paper 10 turning the dyes into gas, which gas transfers to the fabric 11 thereby providing the fabric 11 with a mirror image of the the transfer paper 10 image.
  • there is provided, in the transfer printing system means to introduce masking elements 19 in the form of sheets, between the transfer paper 10 and the fabric 11 when the transfer paper 10 and the fabric 11 pass between the heated drum 12 and the belt 15 of a transfer printing system.
  • the masking sheets 19 may carry an image printed thereon in transfer or sublimation dye or the masking sheets 19 may be plain.
  • the masking sheets 19 are introduced by feeder means 16 in the form of a sheet feeder mounted on a trolley 17 which is movable along tracks 18 which extend parallel to the rotational axis of the heated drum 12 and adjacent the heated surface of the drum 12.
  • the sheet feeder 16 is manoeuvrable along the tracks 18 to alter its position relative to the rotational axis of the heated drum 12.
  • the trolley 17 supporting the sheet feeder 16 is moved along the tracks 18 by a servomotor 21 controlled by a computer 20 associated with a random number generator, which thus positions the sheet feeder 16 along the tracks 18 in random positions.
  • the sheet feeder 16 itself is actuated at random intervals and at the control of the computer 20.
  • the masking sheets 19 are thus fed by the sheet feeder 16 at random intervals and at ran ⁇ dom positions relative to the rotational axis of the drum 12 between the transfer paper 10 and the fabric 11.
  • the transfer or sublimation dye carried on the transfer paper 10 will not penetrate the masking sheet 19 and hence the dye from the transfer paper 10 will not impinge on the fabric 11 thereby causing an area equivalent to the surface area of the masking sheet 19 to not be printed on the fabric 11.
  • the masking sheets 19 carry an image printed in a transfer or sublimation dye, the image on the masking element is transferred to the fabric in the area adjacent the masking element rather than the image printed on the transfer paper.

Landscapes

  • Printing Methods (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Electronic Switches (AREA)

Abstract

Procédé permettant d'imprimer sur un matériau (1) une image composite constituée d'au moins deux parties (8A, 8B, 8C, 8D) portées par au moins deux éléments d'impression. Chaque élément d'impression porte une partie (8A, 8B, 8C, 8D) de l'image composite à imprimer, et chaque partie d'image (8A, 8B, 8C, 8D) a une longueur de répétition respective (Ra, Rb, Rc, Rd). Les longueurs de répétition (Ra, Rb, Rc, Rd) sont différentes les unes des autres, et ainsi chaque partie d'image (8A, 8B, 8C, 8D) est imprimée de façon répétée selon sa propre longueur de répétition (Ra, Rb, Rc, Rd). Selon un autre aspect de l'invention, l'image composite peut être imprimée au moyen d'une ou de plusieurs teintures de transfert ou de sublimation, pour constituer un substrat (10) portant une image, destiné à être transféré sur un matériau (11) devant être imprimé, par mise en contact dudit matériau (11) et du substrat porteur d'image (10), et vaporisation de la ou des teinture(s).
PCT/SE1994/000672 1993-08-17 1994-07-07 Procede d'impression, materiau imprime selon ce procede, et procede de production d'un materiau imprime Ceased WO1995005285A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU73925/94A AU7392594A (en) 1993-08-17 1994-07-07 Printing method, material printed thereby and a process of making a printed material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9317122A GB2281054A (en) 1993-08-17 1993-08-17 Printing composite images
GB9317122.1 1993-08-17

Publications (1)

Publication Number Publication Date
WO1995005285A1 true WO1995005285A1 (fr) 1995-02-23

Family

ID=10740641

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1994/000672 Ceased WO1995005285A1 (fr) 1993-08-17 1994-07-07 Procede d'impression, materiau imprime selon ce procede, et procede de production d'un materiau imprime

Country Status (3)

Country Link
AU (1) AU7392594A (fr)
GB (1) GB2281054A (fr)
WO (1) WO1995005285A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2521713A1 (de) * 1974-05-17 1975-11-27 Blair L Perry Verfahren und vorrichtung zum gleichzeitigen bedrucken einer mehrzahl von bedruckstoffen unter waermeanwendung
GB2107250A (en) * 1981-10-14 1983-04-27 Hamilton Publications Printing process and printing press
SE432480B (sv) * 1976-10-21 1984-04-02 Brunswick Corp Forfarande for astadkommande av en maskeringsduk med flerfergad yta
EP0364820A1 (fr) * 1988-10-21 1990-04-25 MOLDIP S.p.A. Feuille de camouflage et sa production

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176859A (en) * 1978-05-15 1979-12-04 Safron Printing Company Non-counterfeitable documents
CA1322888C (fr) * 1987-08-04 1993-10-12 Ian M. Sillars Methode et appareil servant a imprimer des tableaux de nombres quasi aleatoires dans une presse flexographique
WO1989001409A1 (fr) * 1987-08-14 1989-02-23 Sillars Ian Malin Appareil pour imprimer des tables de nombres quasi aleatoires

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2521713A1 (de) * 1974-05-17 1975-11-27 Blair L Perry Verfahren und vorrichtung zum gleichzeitigen bedrucken einer mehrzahl von bedruckstoffen unter waermeanwendung
SE432480B (sv) * 1976-10-21 1984-04-02 Brunswick Corp Forfarande for astadkommande av en maskeringsduk med flerfergad yta
GB2107250A (en) * 1981-10-14 1983-04-27 Hamilton Publications Printing process and printing press
EP0364820A1 (fr) * 1988-10-21 1990-04-25 MOLDIP S.p.A. Feuille de camouflage et sa production

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 8, No. 28, M-274; & JP,A,58 187 388 (TOPPAN INSATSU K.K.), 1 November 1983. *

Also Published As

Publication number Publication date
GB2281054A (en) 1995-02-22
GB9317122D0 (en) 1993-09-29
AU7392594A (en) 1995-03-14

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