DE1278454C2 - DIFFERENTIAL OR COPY SYSTEM - Google Patents

Description

55

The invention relates to a duplicating or copying system comprising a receiving sheet and a carrier sheet and has one or more layers of material, parts of which when copying 6c or duplication process are transferred to the receiving sheet, the one or a layer of material is designed as an adhesive layer that covers the parts of the or each material layer to be transferred connects to the receiving sheet, and between the carrier sheet and the one next to it Material layer is a synthetic resin intermediate layer.

There are known copier systems, for example with carbon paper, in which a sticky or non-drying Material layer serves as an adhesive layer, which due to its stickiness or adhesive property without further includes the transfer of the or each layer of material from the carrier sheet to a receiver sheet Effect marking pressure. The known soft, sticky or non-drying layers exist from preparations based on oils or waxes, which in the usual way with pigments or Printing inks are colored. These known copier systems have several disadvantages. One of The main disadvantages are their tendency to soil and rub off. In addition, they also give up prints Areas with which the carrier sheets just happen to be in Come into contact. Furthermore, they can spoil during storage and lose their effectiveness, as the sticky layers of material harden over time. These material problems eventually make Non-porous backing papers are required so that the oily components of the layer do not penetrate.

Various proposals have been made to address these drawbacks, particularly lubrication and to avoid staining by covering them with a strong protective coating of a hard material provides. But copier papers prepared in this way also require a soft or sticky, mostly waxy one Layer at least as an adhesive layer for producing through-prints. With such a two-layer copy material (German patent specification 855 410) a kind of carbon paper will be Smear by using a non-hardening or non-drying oily or waxy Transfer material from which the dyes have been omitted is reduced. Above it becomes a thin Layer of a pigmented drying ink or a drying ink consisting of a color solution upset. The paint solution layer provides some protection for the soft preparation against accidental soiling. If the paper is used for writing or typing, so the color solution adheres to the receiving sheet, because the marking print does not dry sticky adhesive layer penetrates through the layer of paint solution.

In another known copier system (German patent specification 636332), the carrier sheet a soft or sticky waxy adhesive layer on top of that with a hard layer of paint, in particular Benzoin layer, is covered. The colored, hard carrier! However, the species layer consists of a natural one Resin and interacts with the waxy surface of a receiving sheet against which it is has a high affinity, while the soft adhesive layer of the carrier sheet has parts of the hard color layer readily releases during the transfer.

Attempts have also been made to incorporate synthetic resins into soft or tacky transfer layers, however, the use of such resins is essentially sticky or soft in character the material layers have not changed significantly. Here, too, there is the well-known physical principle of bonding the sticky layers of material that are responsible for transferring parts of them from the backing sheet is responsible for not relying on the recording sheet.

There is also known a copying system in which

under the marking print a color reaction between one component contained in a material layer of the carrier sheet and one in a material layer The second component contained in the recording sheet is triggered, which becomes a visible Imprint leads. The storage capacity of these copy sheets is often relatively short.

It has now been found, surprisingly, that the disadvantages of soft, sticky Übertragungsinaterialschichten the known, initially mentioned copying systems or other copy-once systems jnit teüs semi-soft, partly dry material layers can be applied only bite or Kohlenwasserstpfflösungsinittejzuberejtungen, Hod preventable ₁ when the present invention between the carrier sheet and the material layers formed as thin, dry synthetic resin layers have a brittle intermediate layer, which consists predominantly of individual particles of a hard, brittle, non-plasticized poly (methyl methacrylate) or polystyrene which has no noticeable flowability at normal temperatures and has less adhesion to the carrier sheet than to it consists of or contains the material layers and is locally broken under the marking pressure during duplication or the like.

Such a fragile brittle intermediate layer allows the particularly advantageous use of thin to very thin, dry, non-smearing layers of dry transfer material synthetic resins, as such layers do not smear and are resistant to aging. Although such dry synthetic resin layers are not adhesive in the conventional sense, they do exhibit sufficient affinity to each other and to some other materials, including paper, to get through Pressure is firmly bonded to each other and transferred from the carrier sheet to the receiving sheet to be able to, provided that they originally only weakly connected to the carrier sheet are - where the brittle intermediate layer serves - so that the weak bond is complete Separation of parts of the dry material layers to be transferred from under the relative weak adhesive forces between the dry layers are not prevented.

The components of the various material layers and thus also the intermediate layer can be preferably in the form of aqueous dispersions on normal papers or dg '. Special papers, z. B. non-porous papers are not required. No need for aqueous dispersions those with the use of hydrocarbon solvent-containing dispersions or preparations related circumstances.

If paper or a similar substance is used as the carrier material, nonionic ones should preferably be used or anionic resin particles can be used as cationic resin particles are one have a relatively high affinity for cellulosic material.

In certain cases, the brittle intermediate layer can be mechanically, for example by a Printing process, apply, but the application is in the form of a dispersion, e.g. B. with air knife, preferred.

The synthetic resin dispersion is dried at temperatures that are not too high, so that the individual synthetic resin particles do not fuse or crosslink with one another or combine to form a homogeneous layer, but the necessary discontinuity is guaranteed.

The brittle intermediate layer consists of individual small particles so that it does not take the form of a continuous film. The synthetic resin should be at room temperature or under normal Tem _; : 1-ture. have no noticeable flowability, so that the discontinuity of the intermediate layer is not lost even with prolonged storage and so that the carrier sheet can be stored for practically unlimited periods of time. The synthetic resins used should therefore also practically not be plasticized.

The particle size of the synthetic resin particles present in the dispersion is preferably not larger than about 1 micron.

Called the brittle intermediate layer, it is a relatively hard and fragile layer meant, which in itself has little cohesion, so that when a force is attacked on a certain one Area of this intermediate layer this area crumbles from the rest of the layer and the material becomes from this area slightly from the material remaining on the layer also at the borders of this Surface.

The outer material layer of the carrier sheet * is preferably a dry thin layer of a synthetic resin used, which is a ^ especially has high affinity for the surface of the receiving sheet. This as an activation or adhesive layer The material layer formed is that which brings about the transfer of layer parts onto the receiving sheet Material layer.

In an advantageous modification of the copying system according to the invention, the adhesive layer is on the Receiving sheet provided to prevent the adhesion of parts of the upper material layers of the carrier sheet, on which the recording sheet is placed, under effect to effect the marking pressure in the lettering, so that the lettering by exposure comes from parts of a colored layer. In this case, the material layers of the carrier sheet no natural affinity for an unprepared recording sheet. The one on one of the two Leaves outer adhesive layer is therefore itself dry, without sticky or sticky properties in the conventional Senses why the whole copier system is dry and not dirty. According to the invention prepared leaves do not spoil even after long periods of storage.

The strength of the brittle intermediate layer can, without impairing its special brittleness, by mixing with particles of a high melting point acrylic resin, a dispersion of a polymerized terpene resin or a butadiene copolymer.

The adhesive layer can be on the receiver sheet surface or directly on the brittle intermediate layer of the carrier sheet, if necessary with the inclusion of one or more additional material layers, be provided. The additional material layers that may be present, for example colored layers or masking layers, should be one greater affinity for the adhesive layer and the brittle intermediate layer and any other if necessary have existing material layer than the affinity of the brittle intermediate layer for the carrier sheet.

5 6

The adhesive layer does not need to be rolled or sprayed on to speak of. the Possess adhesive properties, provided that they are only a coatings are dried by dry air; but corresponding affinity to the surface of the recording - also other drying processes, the increased template, to which an imprint is to be transferred and apply temperatures or vacuum, or cold pressure to brittle intermediate layer or, if necessary, 5 circulation processes can be used, has existing topmost further material layer. Under certain circumstances, electrostatic The adhesive layer is preferably, but not breathable, or transfer-applied. the necessarily made of a synthetic resin, the layers of material can cover the entire surface, able to form a continuous layer - If z. B. one or both sides of a sheet of paper influenced Cover resin with noticeable flow behavior as a dispersion. However, some or all of the materialsion is used, a concoating can also only be applied to certain surfaces during drying continuous film can be produced. Synthetic, will. For example, you can have one side of the pasich The entire surface of the paper sheet suitable for the activation or adhesive layer with the brittle Resins can be plasticized. fragile intermediate layer and the other material

If the receiving sheet is made of paper, add further layers of material while the adhesive layer sen favorably trained. Adhesive layers of polyethylene, only on certain parts of the surface of the carrier sheet or plasticized polystyrene, polyacrylic resin, poly- the receiving sheet is applied. The ordered one Terpene resin, polyamides as well as certain voltage of certain surfaces can be done so that Mixed polymers and mixtures thereof and - if a pattern is formed by simple transfer, the adhesive layer is provided on the receiving sheet ao It is also possible by means of the material layers, is - if necessary, a content of wax. to build a relief-like arrangement through

An adhesive layer made of synthetic resin also has - simple marking printing can be transferred, if an almost unlimited shelf life. when it comes into contact with an adhesive layer.

A major advantage of the invention. The material layers can be colorless, translucent

Copier system is the wide variety of uses or can be white, pigments or others opportunities. The essential system of co-printing inks included. The dye or pig-acting agent dry layers of material can be made in one or more material denotes by ment Inclusion of further layers of transfer material on the back of one of the receiving layers be expanded, which dyes or sheet to be applied carrier sheet provided, be, others by physical means, e.g. B. mechanical, 30 When the outermost layer of material is an adhesive layer If it is electrical, electrostatic, or magnetic, the paint will come off and a print will appear Paths, perceptible or chemically detachable, result in each receiving surface to which the adhesive substances contain. layer has affinity. When the outermost material

For example, if a substance with a 10% layer has no affinity for the untreated, _{finely divided magnetic iron oxide (Fe 3} O ₄ ) for 35 sheets, the color can be applied to a surface using a magnetic scanning head. transferred, which is prepared with an adhesive layer. It

Some of the effects that can be achieved in this way are also possible over the brittle intermediate layer of special modifications of the known one with a pigment layer not bound by resin soft, waxy material layers provided provided, since a further resin layer, the z. B. Copy sheets known per se. So the Ko- 4 ° can represent a further layer of material in the color paper containing colored material layer can penetrate layer after layer and attach it to the brittle intermediate layer through another pigmented, z. B. white layer binds.

Material layer be masked in a known manner. As already stated, an external material

With a corresponding arrangement of the layer, it can also be designed as a masking layer. the Layers of material the lettering by lifting off 45 printing ink can be in the brittle intermediate layer a cover layer, usually a white sheet or a further material layer, the masking ends Material layer, of a colored tearing color in a further material layer or in the produce gerblatt. All of these known adhesive layer techniques can be included. Also two inks to create a perceptible imprint can be incorporated, e.g. B. one in the brittle the invention without the disadvantage of using 5 ° intermediate layer and one in a further material softer, waxy preparations for the mate layer

rial layers too. However, this has no similarity. A particularly advantageous carrier sheet except

between the inventive and known the brittle intermediate layer a single further than Copier systems means, but only the possible ink layer formed material layer and Outlines Modifications of the Invention. 55 one at the same time the adhesive or activation layer

Any additional outer layers representing material layers and masking layers which may be present should have an affinity for the brittle intermediate layer. In this way a clean, disposable activation layer and, as mentioned above, a duplicating sheet are obtained which have any suitable additional layer of material on top of them. A freely traded surface, such as paper, with a layer of material lying under a marking on a sheet should rub off little pressure. Manufacturing requires only some or no affinity for the intended inclusion- simple steps. A corresponding copy sheet surface, as long as an adhesive layer, the production of which is even easier, is provided between them in order to avoid an undesirable coloration other than the brittle intermediate layer. as an activation and / or marking layer made of When the material layer composed of 65 according to the invention is formed, when the carrier sheet of material layers is applied as resin dispersions or the brittle intermediate layer is colored.
be, this can be done by numerous methods, The material layers of the inventive co-

z. B. by printing, covering, dipping, piersystems can be provided with protective layers

7 8

to be able to remove the layers underneath, which are made in accordance with example 1

would take the transferable. Layers under the effect

A marking print become accessible before Fragile brittle intermediate layer (1.5 to 3 g / m ² )

other substances to protect. For example, _Dis persion of a nonionic

a clean, hectographic carbon paper _{with 5 plasticized} polystyrene with high

Ways to be obtained that one emespintusloshche _{hem melting point 100} parts

hectographic printing ink _{layer with a brittle carbon black 35% paste in water} 1 ₀ parts

Interlayer covers and then an adhesive layer _{ßlaues Pi} ^ _{ent aqueous paste 4 parts}

applies and this carrier sheet in connection with & - > ο

a recording sheet is used, on the back of which io are mixed together and as a layer through if there is an adhesive layer or an unprocessed layer, it is rolled on or by air knife on a paper, surface applied and dried.

The invention is described below in an advantageous manner after the brittle intermediate layer has dried

Embodiments on the basis of drawings, in it is provided with a coating of the following combination

to which inventive transmission systems are provided, which is then dried on them,
are provided, explained in more detail. It shows

Fig. 1 is a schematic representation of six activation or. Adhesive layer (from 5 to 10 g / m ² )

simple embodiments of the inventive co- _{dispersion of} low-melting

pier systems polyethylene; 20 «/ 0 fixed parts 100 parts

Fi g. 2 schematically shows cross sections of three work 20 R _u ß _pas t _e 14 parts
stages A, B, C of a copier system as described in Example 1 below, and the copier material obtained is a one-time copier

F i g. 3 to 8 are schematic cross-sections of copy sheets. The material layers can be neatly hand systems, as they have in Examples 2, 3, 5, 6, 7 and 8 and are written under the pressure of a writing, namely before (A) and after (B) the as instruments, a typewriter or a printing application of a copy printer. Makes excellent copies on untreated

In the copier systems of Fig. 1, B denotes paper as the receiving sheet. The dye does not seem to be a carrier sheet, R a receiving sheet, F a fragile one that is noticeably through the adhesive layer,
Liehe spiöde intermediate layer having a relatively overall The structure and operation of the Kopierringem cohesion, a relatively niedri- 3o systems are shown schematically in Fig. 2 explained in the gene adhesion to the carrier sheet B and an insignificant the three images A, B and C, the Prepared tend affinity for receiving sheet R, I represent a mate copy sheet 20 and an untreated receiving layer with an adhesion to the intermediate layer F. Paper sheet 21 before the inscription process with but insignificant affinity for receiving sheet R, application of pressure. In the case of labeling 71 a first material layer with adhesion for the intermediate process, in which a certain surface part of the layer F, 72 a second material layer with carrier or copy sheet is pressed and transferred onto the receiving sheet, but insignificantly adhered to the material layer / 1 , the part adheres to the affinity for the recording sheet R, and A is an adhesive sheet, so that after removal of the material or activation layer with affinity for the recording, a print remains on the recording sheet. This recording sheet R and the material layers F, / or 72. 40 copying system corresponds to that which is denoted by TV in FIG. 1, the embodiments labeled I, II and ΠΙ. The paper carrier sheet 22 of the copier system has a receiving sheet R with the pigmented, brittle intermediate layer 23 made of poly, an adhesive or airtivation layer A applied . styrene particles, on which the pigmented, as Akti-Mk such embodiments, one receives no vienmgs- or adhesive layer 24 formed material print or no copy, if the carrier sheet with 45 layer is made of polyethylene. When applying normal pressure to the untreated surface of pressure by means of the writing instrument 25, part of a recording sheet remains pressed because the brittle pigmented polyethylene layer adheres to the unbe intermediate layer F (in I), the material layer 7 (in Π) treated recording sheet 21 . When you lift off and the second material layer / 2 (in TTl) an unbroken paper (Figure C) breaks the relevant significant affinity to the receiving sheet. If 50 part 26 is removed from the polyethylene adhesive layer 24 and the fragile brittle intermediate layer F in particular also takes up part of the polystyrene layer 23 mil is weak, the arrangement I will have the disadvantage that, adhering to the receiving paper 21, there is a possibility of damage to the brittle intermediate layer. results in a visible imprint
layer when the product is exposed to external attack. 55 Example 2

The arrangements marked with IV, V, VI ",,,., ..,". ,,., _ ,, ".

The last layer applied is the adhesive, fragile, brittle intermediate layer (1.5 to 3 g / m =;

or activation layer A on the carrier material B Nonionic dispersion of a high-

on. These systems give up untreated absorption melts, not plasticized ones

surface prints, as shown in Fig. long. 60 p _o i _yme thyme methacrylate 100 parts

The following examples make use of Systems II dispersion of a butadiene mixed poly-

to VI in F i 2. 1; in Examples 1, 2, 3.4 was _mers * / 10 parts

a pigment preparation is used as the printing ink. Polyacrylate thickener ...... 2 parts

This preparation can be replaced by any other pigment water. 10 parts

or any other dye that can 65

not be mixed up in other material layers of the system and by means of a roller or a

dissolves or penetrates into them. All quantities are expressed in terms of air knife on the surface of a sheet of paper

parts by weight specified. brought and dried.

327

1. Material layer from 1.5 to 3 g / m ² (printing ink layer)

Polymerized terpene resin 100 parts

Black pigment paste 12 parts

Blue pigment paste 1 part

are mixed and applied as a layer to the fragile brittle intermediate layer and dried. Optionally, the mixture can be mixed with a polyacrylate thickener, e.g. B. with 1 to 3%> Texigel PS 253 A from Scott, Bader & Co. Ltd., thickened will.

2. Material layer from 5 to 10 g / m ² (masking layer)

Titanium dioxide, 60% paste in water, 100 parts

Polystyrene dispersion 18 parts

Ethyl acrylate dispersion 20 parts

Dispersion of polymerized

Terpene resin 10 parts

Polyacrylate thickener 2 parts

are mixed and applied as a layer to the first layer of material and dried. The resulting Layer had a clean white appearance on the treated side and did not stain on the untreated side Paper off.

Activation or adhesive layer (1 to 5 g / m ² )

A surface onto which the above layers of material can be transferred is obtained by the following preparation is applied to the surface of the paper and it is dried at room temperature Polyethylene dispersion, 20%> solids 100 parts

Ethyl acrylate dispersion 24 parts

Polyacrylate thickener 12 parts

The structure and use of this copier system are shown in FIG. 3, where A shows the prepared carrier sheet 30 and the receiving sheet 31 provided with the adhesive layer 34 before an inscription process and B shows the carrier and the receiving sheet after the inscription or copy. The arrangement corresponds to embodiment ΪΠ in FIG.

Example 3

A sheet of paper is sequentially provided with a brittle intermediate layer as well as a first and a second further material layer coated as in example 2. Then the same is applied to these coatings Activation or adhesive layer preparation described in Example 2 is applied and the coating dried at room temperature

The resulting copy material has a clean, almost white appearance on its treated surface and gives excellent copies on untreated Paper surfaces.

The construction and use of this copy material are explained at A and B in FIG. The prepared copy sheet 40 consists of the carrier sheet 42, the brittle methacrylate intermediate layer 43, the pigmented color layer 47, the pigmented masking layer 48 made of polystyrene-ethyl acrylate and the unpigmented activation or adhesive layer 44. The very multiplication system thus corresponds to that shown in FIG G. 1 is indicated under VI. After the inscription with the application of pressure, the part 46 of the adhesive layer 44 remains adhered to the recording paper 41 with corresponding parts of the layers 48, 47 and 43.

Example 4

A replication system was prepared as described in Examples 2 and 3, with one another used for the adhesive or activation layer of the following mass:

Dispersion of polymerized

Terpene resin 12 parts

¹ ^ ethyl acrylate dispersion 5 parts

Acrylic copolymer dispersion 5 parts

Terpene resin dispersion 2 parts

Water 20 parts

Polyacrylate thickener 3 parts

The structure of the product corresponds to that of Examples 2 and 3; it is equally effective.

Example 5

The following layers are applied to the surface of a sheet of paper stained with a stain applied which does not dissolve in these layers or penetrate them

Fragile brittle intermediate layer (1.5 to 3 g / m ² )

Dispersion of high melting point

Methyl methacrylate resin 100 parts

Polyacrylate thickener 4 parts

are mixed until it shows good flow behavior, then applied with rollers or air knives and dried.

Material layer (masking layer)

\ o A masking layer is used, as it is described in example 2 as "second material layer"

The resulting carrier sheet has a white surface that is activated by pressure on the reverse side a receiving sheet placed on the carrier sheet can be transferred. The adhesive or activation layer The adhesive or activation layer according to Example 2 is on the back of the acceptance sheet. In a modification, the adhesive layer can consist of a high-melting paraffin wax.

The structure and use of this copy material are under A and B in FIG. 5 explained. The prepared carrier material 50 consists of the pigmented carrier sheet 52 with the methacrylate

Intermediate layer 53 and the masking layer 58 made of polystyrene-ethyl acrylate a recording sheet 51, the underside of which is provided with the adhesive layer 54 made of polyethylene and acrylates This arrangement corresponds to the reverse

that which is designated in Fig. 1 with Π. Dei An impression is made by lifting off the receiving sheet 5] with a part 59 of the masking adhered to it layer 58 visible, in which the color of the carrier sheet 52 is exposed.

Example 6

In a modification of the copy material according to the example, the adhesive layer can be used as the top layer on the Ma

11 12

Material layers of the carrier sheet are so that these substances are mixed and used as a layer

an activated carrier sheet is obtained, of which the white is applied to the printing ink layer and dried

Masking when labeling against the back net. A suitable coating weight is in the range

of an applied untreated receiving sheet from 4 to S g / m ² . The product has a clean, can be lifted. This modification corresponds to an almost white appearance of the treated surface

conversely that in FIG. 1 marked V and works well with untreated paper surfaces

leadership style. It includes a prepared carrier copy.

material 60 composed of a carrier sheet 62, a brittle one. The structure and method of application of this intermediate layer 63, a pigmented masking copy material similar to that of V in FIG. 1 layer 68 and corresponds to an adhesive or activation layer io is shown in FIG. 7 shown. According to this, there is 64 that the prepared carrier material 70 is used with an unbshaadelieu Aufnahra & sheet 61 from a carrier on which the part 66 of the adhesive layer sheet 72, the a brittle intermediate layer 73, a 64 and corresponding parts of the layers 68 and 63 printing ink layer 77 and one with Masking adhesion (Figure B) after a local print pigmented adhesive layer 74 has been applied. The layer was applied to the surface of layer 61. i ₅ th 77 and 74 can be applied to the untreated

_. . , "Receipt sheet 71 transferred.

Example 7 ⁶

The following is an example of a particular

Given advantageous single-margin duplicating material: Example 8

Fragile Brittle Interlayer:

Polymethyl methacrylate dispersion ... 100 parts A particularly suitable and particularly simple

Butadiene copolymer dispersion ... 5 parts to be produced copy material has a colored

Polyvinyl alcohol, 10% aqueous soldering sheet with a brittle intermediate layer

solution 2 parts as and a masking pigment containing acti-

_. _,, * * * J -U ₁ . fourth layer is coated. The composition

These substances are mixed together _this | _{chichten is described} ^ _{1 at iel 7} .

and by means of rolling or by blowing over a _{Das pr () dukt} ^ _Abdrj £ _{k if the white Mas} .

sharp edge on the surface of a paper sheet * _{kierungsschicht} ⁶ _{on a laid-on} receiving sheet

applied and dried. The _{thickness of the} coating transmits * ^ _n , ^ _{6 dies m} ^s _Fi | _{8 mteT A and B}

harbors at ordinary paper _{The cntspri} ^ _system advantageously about _d ^ _{1n isL ht} reversed DEM

1.5 to 2 g / m. those that are shown in FIG. 1 is denoted by IV. The pre-

Material layer (printing ink layer): parried copy material 80 consists of a pigment

_, .... , ι j n *., tied or otherwise colored paper sheet 82,

Polystyrene dispersion 114 Part _{one barren} intermediate layer 83 and one white

Athylacrylatf'spersion 19 Te, e _pigm oriented adhesive layer 84 carries. Parts of this layer

Polymethyl methacrylate dispersion ... 38 parts ^ _{den by} applying pressure locally on the lower

Black pigment; Paste \ S, 22% _{south of a} sheet of recording paper 81 overlaid

Solids 57 parts transferred

Super fine graphite powder 2 parts _{4o The} ones used in the previous examples

These substances are mixed and formed as a layer of polystyrene and polymethyl methacrylate dispersions

applied to the brittle intermediate layer and form discontinuous, non-homogeneous

then dried. A suitable coating thickness hanging coatings when drying at room temperature

lies in the range from 1 to 1.5 g / m ² . rature; the polystyrene has a softening point at

". . ..... ..,,. .., _ 45 about 110 to 120 ° C, the methacrylate at 140 to

Adhesive or activation and masking _{layer 150} o _{c The} polystyrene used has a particle polyethylene dispersion (30% solid size of about 1 micron or slightly less, the substances) 100 parts of polymethyl methacrylate a size of about Vs Mi-rutile; Titanium dioxide 26 parts crown.

For this purpose 3 sheets of drawings

J -7 ^ "J

Claims (5)

'' · '■ Claims: 1. Duplication or copying system, which comprises a recording sheet and a carrier sheet and one or more layers of material auf- S, of which parts are transferred to the recording sheet during the copying or duplication process, wherein the or one material layer is formed as an adhesive layer that the parts of the or each material layer to be transferred connects to the receiving sheet, and a synthetic resin intermediate layer is present between the carrier sheet and the material layer closest to it, characterized in that between the carrier sheet (B) and the material layers (A , I, 11,12) a brittle intermediate layer (F) is present, which predominantly consists of individual, fine particles of a hard, brittle, non-plasticized polymethylacrylate or polystyrene which does not have any noticeable flowability at normal temperatures and has less adhesion to the carrier material than opposite it consists of the material layers or contains them and is locally broken under the marking pressure during duplication or the like. 2. Duplicating or copying system according to claim 1, characterized in that the top layer of the material layers of the carrier sheet (B) is designed as the adhesive layer (A) effecting the transfer to the receiving sheet (R) (Fig. 1, no. IV, V, VI). 3. Modification of the system according to claim 2, characterized in that the adhesive layer (A) is on the receiving sheet (R) (Fig. 1, No. I, II, ΙΠ). 4. Duplication or copying system according to Claim 1, characterized in that the brittle intermediate layer of particles as a aqueous dispersion applied polymethyl methacrylate or polystyrene consists or these contains. 5. duplicating or copying system according to claims 1 to 3, characterized in that the adhesive layer (A) contains polyethylene, polyacrylic resin, polymerized terpene resin, polyamide and optionally a wax content and that the receiving sheet consists of paper. 50