DE1571835B1 - THERMOGRAPHIC COPYING PROCESS - Google Patents

Description

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Just heated and parts of the heat-activated be the desired characters by hand or

Layer to be transferred to a receiving sheet; using a typewriter on the upper part a die is used, the heat surface of which is written to place the capsules underneath

to break the sensitive layer at temperatures of about 15 pressure and the the characters on

up to 35 ° C from the amorphous state to form again crystalline oil paintings corresponding to the surface, and reached a state that could be softened or, if the heat ruptured

or transferring the capsules into the sticky state by means of heat through an infra-layer are heated to a higher temperature red radiation to form an oil painting

must be broken than to transfer the thermoplastic.

Material on a receipt sheet is required. 10

In the known method, an image is formed from. Furthermore, other methods of formation can also be used

a molten polymer on a poly of latent oil images on an interleaf merisate layer, which is present on a carrier, apply.

formed, wherein when cooling the image formed because the latent oil image according to the invention a

shrinks and the carrier remains with the non-image poly- i ₅ reflected or mirror image of a merizate layer to be copied. Such a matrix must be originals, 1 or 2 be-originals are suitable when executing the prior to the production of copies of the various working methods described above. special types of typewriters are used or

There are also working methods known in which special types are used, or a copy is made, in one stage an image from a volatilizable sub-20 using common types or punch is formed. Thereby the steam of the typewriters was obtained and characters from transferred volatile substance. One disadvantage printing ink or an oil from a scribbler known way of working can be seen in the fact that wear belt, applied to another sheet it is particularly troublesome, the interleaf and that and the arrangement for transferring the printing ink Correctly stack the image acquisition sheet on top of each other. 25 or the oil is heated on the leaf, with a latent The invention is explained in more detail below. Oil painting of the mirror image of the original is obtained,

which can be used as an intermediate material.

(I) Interleaf: As an interleaf, papers, films or

Metal plates can be used. That about education

Oil used as a method of forming an oil latent image 30 of the latent images can be derived from vegetable origin a sheet or sheet-like intermediate oils, animal oils or mineral oils or others material can consist of various known working methods oily or oil-like materials, which the come according to the invention for use. With suitable properties according to the picture for this purpose: the latent images are created using the

35 ways.

1. High pressure copying process using Suitable vegetable oils are peanut oil, linseed oil, an oil or an oily printing ink. Soybean oil, castor oil, corn oil and tung oil.

2. Method of typing on a specific examples of animal oils are Ehale oil, Intermediate original sheet using a cod liver oil and lard or lard.

impregnated with a large amount of oil * ° Typical examples of mineral oils are petroleum and typewriter tape. ^whose . Fractions, such as kerosene, naphtha and pa-

3. Process for the formation of a latent oil image ™ ^^ _{de for other ö] i or oilarti materials of} the reflected! or a mirror image of an original _are pesic acid esters, * _B. Tributyl phosphate, tri on an interleaf, referring to the ₂ . _{äth lhex} ^ _{lphosphat od} . _dgU phthalic acid ester, e.g. B. copying original em transparent or M ₆ ^ _{1 ht} halate, butyl phthalate, 2-ethylhexyl phthalate translucent interleaf, which ^ _{and and} J _e ^P _{liquid Weic} i _ma chel e.g. with an oil of low boiling point over- _adi f _{n acid ester)} azelaic acid ester, Sebacic acid is acidified and exposed to infrared rays, ^ ^ _{G1 inester} . _{These oils are, however, a} result of which the oil to the surfaces wefche the ^ _{Visc (4 ät or} have _mshngkeit so that dark areas or character of the original _{energy, the} developing powder is given _below correspond, taking advantage of the rapid tem- _{bind or retaining} * f _LEVERAGING perature Stieg evaporated at these areas

and transferred to the interleaf. , χ,. , ·. ,

. ,,., _ ..,. ,. . Λιι_ · υ (II) powder developer for development

4. Process for forming a latent oil image _{55 of} the intermediate original sheet with the latent oil images located thereon by pasting an ohmpragmerten paper between the original to be copied and the em

Interleaf and subsequent transfer _The powder developer for developing the

of the oil with execution of the evaporation of the intermediate original sheet possesses in the solid powder

_: Oil, as above under procedure (3) _6o state compared to the oil described above

has been described. _e i _n good adhesion or good tack.

5. Method of using an intermediate The powder developer also has its own, sheet, which with fine shafts under pressure that he opposed to at normal temperature

tearable capsules or under the action of heat in the development specified below is coated with tearable capsules, the 65 method for the image transfer sheet to be used

has no stickiness by covering an oil with a highly molten powder developer,

Kularen material were produced, taking under however at a temperature range of 70 to 170 ° C

: Use the pressure-tearable cap- gets sticky or sticky and stays sticky when

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the temperature for a few to several tenfold mixed sheets, preferably once up to the melting point utes is lowered below this temperature. This of the transfer material is heated in a suitable manner Material is referred to in this description as »thermo and then cooled to normal temperature. To this adhesive «material and these properties as a way become the developing powder image of the "Thermo-adhesive or thermo-adhesive" properties 5 drawing, of the original or the like on the intermediate, sheet fixed.

These properties are necessary in order to obtain the interleaf sheet is transferred to an image latent oil painting from the interleaf sheet after heating, or it wear. Examples of such materials are can also after being placed on an image recording benzoic acid, Sebacic acid, phthalic anhydride, ίο leaf are heated. As an image recording sheet, the Cinnamic acid, maleic anhydride, benzotriazole, p-di- general a paper can be used; requires methylaminobenzaldehyde, Benzoin, dextrose, 1-Phe- if necessary, however, a synthetic Harznyl-3-pyrazolidon, Sorbitol, benzylamine, tribenzylamine, film, a metal plate or a cloth for application Phenacetin, acetanilide, vanillin, methylhydroquinone. The heating can thereby be carried out 2,4-Di-hydroxybenzophenone, ^ -naphthol od. Like. 15 are that one the interleaf or an on-These Materials are cut to a particle size of order from the interleaf and the picture 0.1 up to 100 microns in diameter for use inserting a receiving sheet between heating plates or as a powder developer for the latent oil paintings on which one is heated by means of infrared radiation. Exercise interleaf ground. licher way becomes part of the transferable material

The powder developer can be applied with an absorbent 20 from the surface layer of the interleaf medium for infrared rays can be mixed. Which transferred the image recording sheet, being due to Amount of the infrared ray absorber of the above-described thermal adhesiveness can range from 0.1 to 1 part by weight of excess when developed instantly with a powder coating material lie. As an absorbent for developer, the powder developer on the image parts Infrared rays can be organic or inorganic due to the stickiness of the transferred material Pigment powder can be used. Examples of this is bound under developing the image, are carbon black, iron oxides, chrome green, ultramarine blue, as developer powder for the development of the

Cobalt blue, indigo or the like. The addition of the absorbent image recording sheet can be any fine powder agent for infrared rays is used in the case of a material that is connected to the transmission, the interleaf sheet being transferred onto a portable material in its tacky state is laid, functional and can be bound. For example, they can be convenient. by dispersing an inorganic pigment,

In addition, to regulate the transmitted z. B. basic lead carbonate, zinc oxide, titanium dioxide, Amount of thermally adhesive material on the excess titanium trioxide, iron oxides, cadmium sulfide, basic Application sheet for the following 35 potassium chromate, molybdenum orange, cadmium yellow, Transfer method the above-described chrome green, ultramarine blue and cobalt blue, from thermally adhesive or thermally adhesive material with carbonaceous materials, e.g. B. Soot and Aseinem fine powder of a material with a high content powder, or an organic pigment, such as Melting point, e.g. B. metal powder, metal oxide powder, benzidine yellow, indigo and alizarin in a heat or silica powder. 40 softenable resin, e.g. B. a phenol-formaldehyde

These mixtures can be prepared in the following way: Resin, a eutectic mixture of a chlorine be: A mixture of 0.1 part by weight of naphthalene and polystyrene, or one of the finely powdered copolymer of vinyl chloride and vinyl acetate described above sorbents for infrared rays and 0 to 10.0 Ge. After solidification, the parts by weight of the above-described finely powdered dispersion by suitable means to a ized refractory material are granulated or granulated in particle size from 0.1 to 50 microns borrowed with 1 part by weight of the granular described above. A toner commonly used for electrothermal sticky Mixed material, and this Ge photographic and electrostatic recording mix is melted with heating. After fully used, can also be used constant solidification of the mixture by cooling 50 The color of the developer powder can be appropriate the mixture becomes fine and a particle size of in accordance with the color of the carrier or 0.1 to 100 microns in diameter can be selected by appropriate ones of the image receiving sheet. Medium ground. In such a powder developer that is

It can also be used as a powder developer for de-pigment dispersed in the hydrophobic resin, and Winding of the latent oil images on the interleaf sheet 55, if the resin is thermoplastic, can do so Mixture of fine powders of a material wrapped picture by heating or by exposure with a good transfer ability and one to the vapor of acetone, chloroform, or benzene common toners for electrophotography are fixed with a trichlorethylene. Content of an absorbent for infrared In addition, it can be used as a powder developer for

rays can be used. 60 winding of the image recording sheet according to the Er

finding one with a surfactant

(III) Transfer of powder developer coated on the interleaf sheet or a powder mixture

one of the powder developer and the powder

After the formation of the mirror image a desired surfactant can be used. That th drawing, a desired original or the like. 65 surfactants can be obtained from a conventional the interleaf by developing the intermediate used as a crosslinking or wetting agent to be used with the latent oil painting by the pre-means. examples for this are The powder developer described above is the succinic acid, alkyl ester sulfonate, alkyl benzene sulfonate

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nat, sorbitan alkyl ester, long-chain quarternary am-, whereupon in a trichlorethylene vapor

monium salts, polyoxyethylene sorbitan alkyl esters or the like, was fixed.

The appropriate amount of the surfactant when repeating this procedure were selected from

depends on its type; however, it is in all of the one interleaf copies in ten times the amount

generally in the range of 10 ¹² to 10 ¹⁸ molecules 5.

per 1 cm ² surface of the powder developer, where Example2
in particular 10 ¹³ to 10 "molecules per 1 cm ² surface of the powder developer are preferred. The latent oil image, which is based on a

Such a surfactant that had been de-tracing paper transferred was through

holding powder developer has a high adhesion io a powder developer developed, which by melting

fortune on the transferable material and by zening a mixture of 20 g of vanillin and 1 g of carbon black

its use can increase the contrast of the image by heating it to 100 ⁰ C, solidifying the mixture

an original to be copied increased by cooling it to room temperature and grinding it up

will. a particle size below about 0.035 mm

The above-described transfer of the 15 had been transferred. After the fixation of the so bearable Material from an interleaf onto the retained image according to that described in Example 1 Image receiving sheet can be several tens of times on one working method, the image was on an image receiving intermediate original sheet be repeated. sheet transferred and through a powder developer,

So many copies of an original can be developed as described in Example 1. By

Image receiving papers are obtained. 20 repetitions of the procedure were copies in

The invention is explained below with reference to ten times the amount of the one interleaf

play explained in more detail. (Tracing paper).

For example example 3

One with printing ink that was ordinary printing. The procedure described in Example 1 was used

colored oil, such as linseed oil, printed ori using the developer made by

ginal was heated on an ordinary copy paper a homogeneous mixture of 20 g des

laid, and this arrangement was made by means of infrared powder of a plasticizer, namely a mixture

Radiation for the transfer of the printing ink image 30 of p- and o-toluenesulfonamides and 1 g of carbon black

onto the copy paper by its evaporation at 110 ^° C. and subsequent cooling and grinding

heated. below about 0.035 mm when

The latent oil image transferred in this way was reproduced by a powder developer for the intermediate original sheet.

Developer powder for the development of the intermediate catch.

sheet developed. The developer powder was Example'4 in 35
in the following way.

A homogeneous mixture of 20 g of the powder on an original has been a 20% acetone solution of benzoic acid and 1 g of carbon black was sprayed by heating dimethyl phthalate, melted the original to 125 ⁰ C and. After thorough stirring, it was put on a tracing paper, whereupon the other melted mixture was subjected to 40-order infrared radiation, solidified by cooling to room temperature, and by ceasing the radiation, the temperature then reached to grains with a smaller particle size of the areas showing the characters on the original as a sieve with a clear mesh size of corresponded to the boiling point of the oil, whereby the approx. 0.035 mm granulated or granulated, in order to only evaporate the developing oil in these areas and create winding powder for the interleaf. 45 the copy or tracing paper has been transferred. That

After the powder development, the traced or so transferred latent image on the tracing paper became copy paper (ie, the interleaf) by using any developing powder for radiation with infrared rays to fix the interleaf to the image as in Example 1, 2 or 3 and create of the intermediate material (the given, powder-developed and then the mirror image was heated). Thereafter, a part of the tracing paper developed in this way was treated in a corresponding manner, transferable material, by applying the intermediate as described in Example 1, in order to produce a number sheet on an image receiving paper, producing rich copies.
Image surface is opposite to the paper, after which

Heating the interleaf, or by applying Example 5

of the interleaf onto an image receiving sheet, with 55

the image surface is opposite the recording sheet, an original was applied to tracing paper, and by subsequent simple heating or a thin layer between the original and the tracing paper inserted by heating from the back of the intermediate paper impregnated with glycerol tributyrate sheet by means of infrared irradiation, and was melted, and this assembly became an infrared transfer the imaging sheet. 60 exposed to radiation. The oil on the parts that make up the

Then the image recording sheet was matched with that on characters or image parts of the original, The latent image transferred in this way was evaporated and transferred to the tracing paper underneath application of the powder developer powder developed, the formation of an image transferred by one of the by melting a mixture of 80 parts powder developer for the interleaf, which is in the case of polystyrene, 10 parts of phenol-formaldehyde resin 6g game 1, 2 or 3 were described, developed and 10 parts of carbon black and then grinding the became. The copier or tracing paper developed in this way Solidified mixture into grains of one particle size was prepared according to the procedure described in Example 1 of 15 to 25 microns on average, treated wisely, with many copies being obtained.

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Beisüielo 0.75% aqueous solution of sodium alkylbenzene

sulfonate (mean chain length of the alkyl radical

Fine capsules of gelatin and gum arabic 12,6) were placed, and after drying in vacuo containing dimethyl phthalate, the obtained product was applied into grains of a part of the surface of a thin paper. The ground size of 88 microns. (This Entso-made paper was placed between an original winder as having a surfactant and a tracing paper, the capsule-treated powder developer being designated A),
layer facing the tracing paper. This portion of 10 g of the same toner was mixed with 0.3 ml of Na-

Then, in the 1st order, trium succinic acid dt- (2-ethymexyl) ester sulfonate was exposed to infrared radiation. ■ ίο measured the procedure described above

The temperature of the areas that the characters act on. After the treatment, the mixture became corresponded to the original, was increased and the grains of a particle size below Capsules were broken open with a latent 88 micron milled (this developer is called having Image was formed from the oil-like material on the tracing paper of a surfactant-treated powder. The latent image thus obtained was designated (developer B).

by any of the powder developers for the use of the

Interleaf of the original, as in Examples 1, winder as developing powder for image recording-2 and 3 described, developed, whereupon the so defoliated, for example according to the in Example 1 wound Tracing paper according to the procedure described in Example 1, the blackening was prescribed The method of working with the formation of numerous 20 was the same as that of the image that was copied was treated. Turn the developing powder without the surfactant treatment

Example 7 was improved as follows from the following

Table can be seen.

In this experiment, the intermediate material formed on the image receiving sheets according to the procedures of Examples 1 to 5 described in Example 4 was prepared, and 1-phenyl-3-pyrazolidone was used as the were, were developed, each time the next developer used for this,
Powder developers listed below were used. Blackening

A kneaded mixture of 80 parts by weight of 30 _untreated developer 0.62

Polyester, 10 weight points phenol-formaldehyde- ,, ·, "..,, ·,» - ,,,,,

Resin and 10 parts by weight of carbon black were ^{treated into grains of M} 1 surfactant

with an average grain size of 15 to 25 microns developer A 1.10

ground. The powder developer thus obtained (10 g) treated with surfactant
was, with thorough stirring, in 100 ml of a 35 developer B 1.25

Claims (9)

10. The method according to any one of claims 1 to 9, claims: characterized in that one with a powder development of the image receiving sheet 1. Thermographic copying process using succinic acid, alkyl ester sulfonate, alkylbenzene Use of a carrier with a coating, sulfonate, sorbitan alkyl ester, long chain quarterder gives off a liquid when heated, so that närem ammonium salt or polyoxyethylene sorbic a latent tan alkyl ester coated or mixed with it with image-wise heating with IR Moisture pattern is formed using the powder developer, latent moisture image initially with a
powdery, normally hard and ok non-sticky or adhesive material that at a temperature in the range of 70 to 17O ⁰ C melts and forms a metastable Liquid can be cooled, developed and for the production of one or more copies partially 15 The invention relates to a thermographic Transferred to another carrier, on phisches copying process for the production of Reprodem the image obtained is then finally produced or copied, and in particular on a is wound, according to the German patent application thermographic process for copying or dung P 15 71 832.8-45 (German exposition copy of an original in large numbers 1 571 832), characterized by 20 usable papers. that one can create a latent image by imagewise In the .deutsche patent application P 15 71 832.8-45 Steaming of oil or oil-like substances (German Auslegeschrift 1 571 832) is a thermo- represents. graphic copying method using a 2. The method according to claim 1, characterized in carrier with a coating that when heated draws that the latent oil image is given off by means of water of crystallization, so that under image-wise high-pressure copying or typewriter warming with IR creates a latent moisture image, forms is described, which is characterized 3. The method according to claim 1, characterized in that the latent moisture image is first drawn that one brings the latent oil image by applying a powdery, in the normal state hard oil with a low boiling point 30 and non-sticky or adhesive material, which melts on an original, placing the original on a support at a temperature in the range from 70 to 170 ⁰ C and allowing IR rays to act, and produces the arrangement thus obtained with the formation of a metastable liquid. can be cooled down, developed and used to 4. The method according to claim 1, characterized in that one or more copies are identified in part draws that one transfers the latent image by inserting 35 another carrier on which the one the image is then finally developed with an oil-impregnated paper. see an original and a carrier and an according to the present invention a thermo- causing IR rays to act on this array using a graphic copying method manufactures. Carrier with a coating that when heated a 5. The method according to claim 1, characterized in that it emits 4 ° liquid, so that under image-wise drawing, that the latent oil image is turned into a latent moisture image while heating with IR of pressure- or heat-sensitive forms, according to the German patent application Capsules that contain the oil. P 15 71 832.8-45 (German document 1 571 832) 6. The method according to any one of claims 1 to 5, created, which is characterized in that one characterized in that the powder 45 is a latent image by imagewise evaporation of shaped material produces benzoic acid, sebacic acid, oil or oleaginous substances. Phthalic anhydride, cinnamic acid, maleic anhydride according to the method according to the invention, Benzotriazole, p-Dimethylaminobenzalde- containing copy has good stability and will hyd, benzoin, dextrose, acetanilide, vanillin, me- not discolored during storage and in the ethylhydroquinone, 2,4-dihydroxybenzophenone or 5 ° quality not changed, in contrast to the inß-naphthol used. stable copy, obtained from a standard copier 7. The method according to any one of claims 1 to 6, material of the silver salt type is obtained. characterized in that the over- In the method according to the invention can transfer of the image to an image recording sheet in the above-described transfer method with subsequent development of powder, repeated several ten times executes. den, and from an intermediate original sheet a 8. The method according to any one of claims 1 to 7, large numbers of reproductions or copies thereby marked that one will hold the powder. In addition, the procedure Development for the image receiving sheet by means of the entire copying process according to the invention a powder developer carried out for binding 60 according to the dry system. of the melted thermo-adhesive material. A thermographic copying method is suitable is. in which a die with a heat-sensitive 9. The method according to any one of claims 1 to 8, borrowed layer, which consists of a at least partially characterized in that the powder crystallized, not sticky in the normal state, development for the image recording sheet by 65 thermoplastic material, which is pulverized when Ereinen with a Solid surface heat to a temperature of about 50 to 200 ⁰ C active agent coated or mixed with it becomes amorphous and this state executes with a deeper powder developer. Maintains temperature for a certain period of time,