DE2144940A1 - Photographic film unit for the production of a finished photographic image - Google Patents

Description

PATENT LAWYERS
DR.-ING. WOLFF, H. BARTELS

DIPL.-PHYS. WOLFF.

Photographic film unit for making a finished photographic image

The invention relates to a photographic film unit for the production of a finished photographic image with an integral image carrier having a photosensitive element which is a photosensitive element disposed on a carrier Layer aufweisj: in which at dqr exposure In a central area enclosed by a frame, a latent image is created, and that with a corresponding one Developer element is connected, which -in the development of the latent image, which occurs when the Film unit between two pressure bodies of a developer distribution device a photographic camera used here is initiated to distribute one in a container the developer substance contained between the two elements.

Photographic film units for the formation of a finished photographic image are in the field of photography well known. In one particular type of these known photographic film units, also known as "peel-apart" film units, ie peel-off film units the photosensitive elements and the developer elements are separated from each other during the exposure held and placed on top of each other for the development process. In this mutual association, the film unit is a developer distribution device between the pressure hulls passed through, whereby the developer substance squeezed out of its container and between the photosensitive Element and the developer element is distributed as evenly as possible in a layer of a certain thickness. the such distributed developer substance, for example a

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viscous working solution or developer liquid, permeates then the layers of the image carrier of the film interior and causes a development of the photosensitive layers. Finally, an imagewise distribution of dye or SiJLber is formed or on the image receiving layer diffuses into this, so that a finished photographic image is created. The image receiving layer can either in the light-sensitive element or in the developer element be arranged. In the latter case the development department " ment, on which a right-hand legible photographic image is created, after the development of the remaining part of the Film unit peeled off. Photographic film units of this type are described, for example, in US patents 3,080,805 and 3,511,659.

In the case of the known photographic film units of the type mentioned at the outset, which are also known as "pre-registered" or referred to as "integral" film units, what remain are those connected and aligned with one another essentially in both elements of the integral image carrier before exposure as well as during and after development same assignment. The developer element is transparent chosen so that exposure of the photosensitive material can be from the "top" of the film unit. It is the image-receiving layer arranged either in the developer element or, however, preferably in the photosensitive element, with it a positive photographic image can be formed without severing or stripping the remainder of the photographic film unit would have to be. Photographic film units of this type are for example in the German patent ..........

(German patent application P 2O 52 145.3) as well as in the French Patents 2,006,255 and 2,006,256.

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The development of photographic film units of the integral Although construction has brought significant progress in terms of reducing many of the problems that the "Peel-off 'film units are own. This is particularly true with a view to the fact that with such filin units initially an assignment of the light-sensitive element and the element carrying the image-receiving layer by superimposing them and separation thereof is required after development. By creating the photographic film units however, numerous and often unexpected new problems have emerged in the integral design. It should only be noted, for example, that the finished photographic Image, which can be produced by means of such a film unit, constantly the emulsion layers of the photosensitive Elements and other equipment necessary for handling and developing this film unit. This results in the requirement for any photographic film unit for sale that the photosensitive element and the means contained in the film unit are designed to improve the overall aesthetic appeal of the finished photographic image. In the preferred embodiment of such a Finally, the photographic film unit should be easy to use and low in cost Manufacture to be ensured without this Quality is affected.

A solution to the problems arising in the case of the film units with an integral image carrier can be by means of the experience gained with the "peel-off" film units. In the aforementioned US Patents 3,080,805 and 3,511,659, the distribution of the working solution is in the form of

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liquid 'developer substance at least partially through strip-shaped spacers controlled, which are a part of the lateral edges of each such film unit. When moving the film unit between the These spacers determine the distance between the two pressure bodies through pressure bodies of the developer distribution device such that the developer substance with a suitable, uniform layer thickness between the two elements of the image carrier is distributed. At the same time, the spacers act along the side edges of the image carrier • to seal it, so that no developer substance prematurely can escape at the side edges. The use of such spacers results in the "peel-off" film units in itself to satisfactory results, since there the finished photographic image after its development of the rest of the film unit and thus also from the spacers is separated or stripped off. For film units in the Such spacers are suitable for an integral design. This is not the case, as they still have one after the development has been completed Represent part of the finished photographic image and on this, impairing the overall impression would become visible.

In those from the aforementioned French patents 2 006 255 and 2 006 256 known photographic film units of the integral construction are the two elements of the The image carrier is comprised of a connecting element which is folded around the outer edges of the image carrier and which due to its material thickness to a part the thickness of the image carrier after the distribution of the developer substance in a Liquid layer determined. The connecting element can be chosen so that it is the finished photographic Picture as a frame encompassing the central picture area

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gives a speaking appearance. Besides the fact that this connector has the appearance of the finished photographic Influences the image and stands out from the surface of the image carrier due to its special folding, this connection has

However
element / mainly has the disadvantage that it complicates the assembly of such a photographic film unit of the integral construction and increases its manufacturing cost.

The invention is based on the object of a photographiache To create a film unit with an integral image carrier for producing a finished photographic image, of which Image carrier is designed particularly expediently, so that the finished photographic image produced therefrom is an attractive one Appearance.

This task is based on a photographic film unit of the type mentioned at the outset, achieved according to the invention in that the photosensitive element and the developer element of the image carrier in the area of the frame surrounding the central image area, at least partially inseparable from one another are connected and that they are completely flat before exposure and after development has been completed Form image carriers with a uniform cross-section thickness. Due to the at least partially non-detachable connection between the Both elements of the image carrier are above all a particularly expedient assembly of this image carrier with savings of material and labor costs for additional fasteners achieved. In addition, it ensures that on no seams or the like resulting from this connection can be observed in the finished photographic image, Weave affect the appearance of the finished photographic image could.

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The two elements of the image carrier are preferably on their surfaces facing one another and lying in the edge region inextricably linked. The connection point between the two elements can be used a pressure-sensitive binder.

In a particularly advantageous embodiment according to the invention, the two elements of the image carrier are at least along part of its side edges running in the longitudinal direction from the front to the rear end of the image carrier connected with each other. This connection point between the two elements preferably essentially forms one waterproof seal.

In a further advantageous embodiment according to the invention it is provided that the two elements in their respective central area flexurally elastic and over the period of the distribution of the developer substance are elastically deformable until they are removed from the space between the two elements. Preferably are the two elements due to their elasticity in the distribution of the developer substance in their central area "Can be moved apart by an amount of 0.08 mm.

Finally, in a further exemplary embodiment according to the invention provided that the photosensitive element and the descrambler at the front and rear ends of the image carrier is a seam that allows the developer substance to be supplied between the two elements or allows the developer substance to flow out Form excess developer substance in a trap provided for this purpose.

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_ "7 -

The invention is described in the following description on the basis of an exemplary embodiment shown in the drawings explained in detail.

Show it:

Fig. 1 is a perspective schematic view of an integral image carrier of a A photographic film unit according to the invention, wherein a bent corner is the developer element the image carrier releases the view between the two elements of the image carrier;

FIG. 2 is a perspective schematic view of the photographic film unit according to FIG Invention, which 'the integral image carrier of FIG. 1, a cooperating container for taking up developer substance, a liquid ice trap for taking up excess developer substance and a carrier tape on which all of the aforementioned parts are arranged;

3 is a partial perspective view of the rear end of the photographic shown in FIG Film unit according to the invention;

4 shows a cross section through one located between the pressure bodies of a developer distribution device The photographic film unit of Fig. 2, the approximate shape of the two elements of the Image carrier according to FIG. 1 during the distribution of the developer substance between the two elements

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is shown;

5 ^{% shows} a perspective illustration corresponding to FIG. 4 of the photographic film unit according to FIG. 2 passed between the pressure bodies;

6 is a side view of the finished photograph after development has been completed Image-containing uniformly flat image carrier;

FIG. 7 is a perspective view corresponding to FIG. 6 of the finished photographic Image-bearing image carrier, which in its shape is essentially the same as that shown in FIG The shape of the unexposed image carrier matches and

Fig. 8 is a perspective view of a for

State of the art image carrier below

. Clarification of the difficulties that arise here

"opportunities.

Photographic film units for making finished photographic ones Images in a photographic camera suitable for this purpose are generally known. The following description therefore refers to the components that determine the nature of the photographic film unit described below.

In Fig. 1, a preferred embodiment is an as

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Part of the photographic film unit shown in FIG. 2 formed integral image carrier 3, which is a photosensitive Element 5 and a transparent development element 7 owns. These elements are designed with straight edges, right-angled corners and convenient borders and are "carefully assigned to one another during production, so that they have the uniformly flat image carrier 3 with form an appealing outer shape, which retains its integral structure even after development. Except one Container for a developer substance, a liquid trap to hold excess developer substance and a sheet-like support which contains additional parts of the photographic film unit to be described in connection with FIG form, the image carrier 3 already has all the parts necessary for development in a photographic camera suitable for this purpose, which are constantly held together, without affecting the finished photographic image.

The photosensitive element and the developing element are linked in such a way that a controlled distribution of a working solution or a developing agent between these two elements is possible without the need for considerable additional resources, such as in the Edge areas of the image carrier -provided spacers are provided should be. With regard to its structure, the image carrier is expediently used for development between printing bodies a developer distribution device of the used here photographic camera or cassette passed through, with the pressure hulls stepped or in their central part are formed reset. The central areas of the two elements of the image carrier can differ in the distribution

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the working solution move apart due to their elasticity and are set back against the central part of the Pressure body pressed, v / o through them the appropriate initial layer thickness of the distributed working solution or developer substance determine. After the working solution has dried or excess working solution from the space between was able to escape the two elements, the central area of the picture carrier decreases again due to its elasticity takes on its uniformly flat shape, originally assumed before development, with the two elements of the image carrier touch each other again in their respective central area.

The light-sensitive element and the developer element are held together with mutual association by means of connecting points running along their lateral edges, which connect the edge areas of the two elements directly and permanently, but allow elastic deformation of the respective central area of the two elements. Between these junctures, the two elements at the anterior and 'rear end of the image carrier in a comparable manner to a supply of the working solution between W the two elements permitting seam or a drainage of excess working solution from the intermediate space between the two elements permitting seam form.

Structure of the integral picture carrier

In a preferred embodiment a photographic Film unit ^^ ä ^ * photosensitive element 5 essentially flat flexurally elastic carrier made of transparent cellulose triacetate film carrier, which has a front end 9, a rear end 11, side edges 13 and 15 and a central part 16 has. At least the middle part 16 carries

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different layers of image carrier material, of opaque light-reflecting material and from a silver halide emulsion with this associated image dye Material. These layers are preferably arranged in the order given, with the position of the transparent Carrier in the vicinity of the outer or bottom 17 (see. Fig. 6) is chosen, where he this side of the photographic Film unit can protect, and wherein the layer of the silver halide emulsion in the vicinity of the inner or upper side 19 (see. Fig. 1) is selected, where they in turn through the transparent Developer element 7 is covered and protected. The silver halide emulsion can, as will be shown in more detail below will be exposed from the top of the photographic film unit through the developer element, while the developed photographic image is viewed through the transparent support from the underside of the film unit can be.

The photosensitive element also has a schematically indicated frame 20, which the photosensitive Completely encloses element in the edge areas. Such a frame defines a sharply demarcated central one Image area within which the latent image is recorded and which, preferably in white color, provides the frame for the finished photographic image which is extends within its limits. The frames provided for the exposure and the finished photographic image are preferably of the same extent and aligned perpendicular to one another. You can, however, also in various ways, for example by pre-exposure or photoresist processes either in a single layer of the photographic film unit or else

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are present in separate layers and with each sharply delineating each of the individual frames.

The developer element 7 is also preferably made of a transparent material such as a cellulose triacetate film carrier. The developer element forms a flexurally elastic, essentially flat sheet which has a front and rear end, lateral edges and a central part which correspond to the respectively assigned ψ parts of the photosensitive element. In order to avoid excessive accumulation of reference numbers in the drawings, separate reference numbers have not been used for those corresponding parts of the developer element and hence the photographic film unit. It will be understood, however, that the parts mentioned are aligned and that they can be referred to by the reference numbers provided for the light-sensitive element and they can thereby be localized, since the same "or similar designations have been chosen for them. In addition to his Property of being able to distribute the working solution in the manner described in more detail below, the transparent sheet-shaped developer element covers and protects the upper side of the photosensitive element and the film unit, but allows the above-mentioned exposure of the silver halide emulsion.

The photosensitive element 5 and the developer element 7 are preferably rectangular and are mutually dimensioned chosen accordingly and are mutually assigned, for example by placing them next to each other and mutual Aligning their surfaces held together by a permanent lock or other permanent connection. At the

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The illustrated embodiment is the permanent connection 21 (cf. FIG. 1) using a cohesive material which reacts under the action of pressure or other Binder formed. Other satisfactory connections can be achieved by closures that can be produced by the effects of heat or sound or by adhesive material are, the latter either on one of the two elements or on both the photosensitive element and is applied to the developer element. The closure or the connection preferably extends in the longitudinal direction along the lateral edges of the photographic film unit from the front to the rear of the image carrier. The scored Compound should be for the working solution or developing agent be sufficiently impermeable to allow this during the development process cannot escape prematurely at the lateral edges of the integral image carrier.

In the illustrated embodiment, the permanent connection 21 extends between the elements of the image carrier in a transverse to the longitudinal direction of the image carrier Direction from the respective side edge to the center line of the frame 20. Since the frame has a width of approximately 6.4 mm should have, this would mean in the present case for the non-detachable connection that its width and about 3.2 mm amounts to. While it is desirable that the permanent connection between the elements of the image carrier up to its outermost edges, so that no curling can occur, the most favorable width of this connection depends in particular Dimensions depend on the respective integral picture carrier.

It can be seen from FIGS. 4 and 5, to be described in more detail below, that the central image area of the image carrier closest edge of the permanent connection

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is separated from the edge of the frame 20 closest to the central image area by at least the minimum distance "a" (cf. FIG. 1). This minimum distance is intended to ensure that any bending operation occurring during development for the photosensitive element as well as the developer element takes place essentially within this range. The minimum distance "a" should also be selected according to the point that it has a proper initial film thickness of the distributed between the two elements working ψ solution or guaranteed developing agent to the edges of the central image area by billed that the two Elements on the one hand must be bent from the edge of their permanent connection closest to the central image area of the image carrier to the point at which they are at a distance from one another for the first time / - which corresponds to the desired initial or maximum layer thickness of the working solution or developer substance . Such a minimum distance "a ^H depends on various parameters of the image carrier, its dimensions and the amount and viscosity of the working solution or developer substance used. The aforementioned preferred width of the permanent connection of the integral image carrier was determined by the assumption, that the parameters of such an integral image carrier the parameters of the current commercial "Extraction ⁿ Filin units are comparable.

Regardless of the particular type of connection or its particular properties and application, it is necessary in the present photographic film unit that the photosensitive element and the developer element are essentially in direct contact with one another or in an equivalent shape along their lateral edge regions

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are firmly connected to each other. While under the term the "direct" or "mutual contact" of the two elements of the image carrier is also insignificantly bulky Interlayers, such as adhesive layers, emulsion layers, the central ones produced by photoresistive processes Mask layers or the like surrounding the image area are in no way intended to fall under these terms are also intended to include the aforementioned spacers or the like, which comprise the two elements of the Keep the image carrier spaced apart by a considerable amount compared to the thickness of these elements. this means in other words, which will be shown in more detail below, that the final thickness of the image carrier im The area of its inextricably connected edges should not be significantly greater than its thickness in the central area Image area.

Photographic film unit

The image carrier 3 described above, which has the photosensitive element 5 and the developer element 7, is particularly suitable in connection with various components of the photographic film unit shown in FIGS. This film unit has, in addition to the image carrier, a sheet-shaped carrier 31, a device 33 for receiving and distributing the working solution or developer substance and a liquid trap 39 for receiving excess working solution or developer substance. The image carrier 3 is releasably attached to the sheet-shaped carrier 2, while the device 33 for receiving and distributing the working solution and the liquid trap are inextricably connected to the sheet-shaped carrier so that, following the development of the image carrier, the image carrier can be separated in a particularly expedient manner.

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can be carried out from the rest of the photographic film unit. After the breakup, this part of the discarded photographic film unit.

The liquid trap, for its construction various solutions are available, has one or more spacers 41, which on an edge portion 43 of the sheet-shaped carrier are attached and which contribute to any emerging at the rear end of the image carrier 3 or working solution Developer substance is collected. The spacers are essentially incompressible and interact with the sheet-like Carriers together in such a way that they are bounding surfaces of a Form chamber or a cavity, the accumulation itself between the pressure bodies of the developer distribution device the excess working solution or developer substance guaranteed. A more detailed description of the mode of operation of such spacers can be found in US Pat. No. 2,686,717 remove.

The device 33 for receiving and distributing the working solution has a splittable container 45 (see is locked. Opposite the first front edge achieved by folding is a second. Front edge 53, which has a closure 54 over substantially its entire length, which can be opened and thereby allows the working solution contained in the container to flow out when hydraulic force is applied. These forces arise when the container between the two mentioned, a passage gap for the photographic film unit forming pressure

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bodies, for example the pressure rollers 55 (see. Fig. 4 and 5), is passed through. The container is with the front end of the image carrier coupled such that its content is distributed between the photosensitive element and the developer element can be. For this purpose, the container has an outlet funnel 57, which at the interface between the two elements of the image carrier at its front end between the Lichtempfine Liehe element and the Eritwicklerelement intervenes.

The sheet-shaped carrier 31 forms a strip-shaped band made of a flexible material which can be cut out as a single piece in the desired shape. The embodiment and design shown permit an individual, mutually independent production of the photographic film units according to FIG. 2 and is particularly advantageous in the automated production of these film units. For example, it should only be pointed out that the sheet-shaped carrier can be held in the spread-out state on a flat vacuum table and that the various components interacting with the carrier / such as the image carrier 3, the container 45 and the spacers 41, thereupon properly on the spread-out surface of the carrier can be attached to the intended locations. After this operation, the edge portion 43 of the carrier is folded over at its rear end over the spacers and the rear end of the image carrier 3, whereby the liquid trap 39 is closed and the production of the photographic film unit according to FIG. 2 is completed.

The sheet-shaped carrier 31 can also be used to connect different

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which photographic film units are used according to FIG. 2, which are combined, for example, in a stack to form a film pack. This film pack is arranged either in a cassette (not shown) or directly in the interior of the photographic camera used for this purpose, which can be sealed off in a light-tight manner. In such a film pack, the sheet-shaped carrier is used to handle the individual photographic film units in the cassette or photographic camera, not shown. For this purpose, the sheet-like carrier can be folded in almost any desired manner at one or more points along its free guide end 59, so that it can be properly attached to another such photographic film unit and a compact accessory:
Film units is made possible.

gen can and a compact assignment of several photogifphi shers

At least one, but preferably both, of the pressure rollers 55 are stepped in such a way that they have a central, essentially straight running surface -61 and shoulders 63. While the photographic film unit is pulled between the two pressure rollers 55, the shoulders lie 63 in the edge areas of the image carrier and the sheet-shaped carrier, while the straight, central running surface 61 the pressure rollers together tear open the container containing the working solution and the working solution in a uniform Distribute the layer between the two elements of the image carrier.

If the liquid working solution or developer substance is pressed out of the container provided for this purpose and between the photosensitive element and the developer element distributed.

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then the prevailing hydraulic ones in the working solution take care of it Forces that the elastic elements are separated from each other in their respective central area and together with the sheet-shaped carrier are pressed against the central running surface of the pressure rollers 55 (cf. FIG. 4 and 5). The depth of the recessed tread on the two pressure rollers determines the distribution of the working solution in a layer with an impeccable initial thickness, which is approximately O, O8 mm is chosen. As the thickness of the photosensitive Element, the developer element and the sheet-shaped carrier automatically for contact between the shoulders of the Pressure rollers and the limits of the image carrier is designed, it was found that the required initial thickness is then can be achieved if the running surface of the two pressure rollers is set back in such a way that their respective depths are approximately 75% the desired layer thickness of the distributed working solution or developer substance.

During the distribution of the working solution, it begins immediately, the different layers of the photosensitive element to penetrate and thereby solves the development process in a way which will be described in more detail below. In addition, various components begin the working solution, which also contains water, to escape through the photosensitive element and the developer element, dissolve completely or otherwise between the photosensitive element and the developer element to penetrate outside into the ambient air, which ultimately leads to a drying of the working solution or developer substance leads. The working solution has only a very small percentage of solids, i.e. less than 5%, while the remainder is the working solution, i.e. essentially water, in the Over time, i.e. within a few hours, between the

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photosensitive element and the developer element escapes. This reduces the forces which the The photosensitive element and the developer element are separated from each other, the elasticity of the two elements of the image carrier their return to renewed mutual contact ^ At this point in time the image carrier possesses again its original uniformly flat shape (see Figures 6 and 7). Since the image carrier 3, as already mentioned, can be peeled off or peeled off from the sheet-shaped carrier, a A finished photographic image can be obtained which, in its dimensions and structure, is completely identical to the original selected structure, which can be achieved by precise truncation and joining the parts to form the image carrier at the time of manufacture.

chemistry

The photographic film unit described above can be used to produce single color or multicolor positive final photographic images. In a three-color system, the image recording material preferably has three emulsion layers which ^{have specific sensitivity ranges assigned to different basic colors and which also have image dye-producing compounds 1} whose spectral absorption ranges are essentially complementary to the specific sensitivity ranges of the corresponding emulsion layer. This means that a blue-sensitive silver halide emulsion layer is in contact with a yellow image dye-forming compound, that a green-sensitive silver halide emulsion layer is also in contact with a magenta image dye-forming compound, and finally a red-

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sensitive silver halide emulsion layer with a one cyan image dye-providing compound is in contact.

In the German patent specification (German patent application P 20 52 145.4), which is specifically referred to is the image dye-providing compounds non-diffusing couplers which co-oxidized Color developing agents react to form diffusing dyes. However, there are other image dyes as well providing compounds for the present photographic film unit including, for example, dye developing and coupling dyes. In the aforementioned German patent it is also described that the image dyes supply connections either in their assigned Silver halide emulsion layers or in layers adjacent thereto.

After the photographic film unit has been exposed to light through the transparent developer element, an in the developer substance contained opacifier distributed in the manner described above in a layer, which is at least over extends the area covered by the exposure. Since the negative part of the photographic film unit is made of opaque material is surrounded and since the emulsion layers, as mentioned, are covered by an opacifier, the film unit is has now become insensitive to light and can still be removed from the camera during development. As a developer substance Serving working or developing solution diffuses through the photosensitive element, whereby the imagewise Exposure of the silver halide emulsion layers initiated will. There is an image-wise distribution of the diffusing ones

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Dye-providing compounds present in the silver halide emulsion layers or are contained in the layers adjacent thereto, as a function of the imagewise exposure the silver halide emulsion layers. At least part of the imagewise distribution of the diffusing dyes i-donating compounds diffuse into the image-receiving layer to form a positive dye image, the through the transparent layer support as a positive, right-side readable image against the opaque, light-reflecting background can be viewed. It is not necessary that the image receiving layer be separated from the rest of the photographic film unit would have to be separated or that a timing of the development would have to be made.

regarding chemistry The photographic unit described should be / act essentially to a photographic film unit according to the aforementioned German patent. However, there are also image carriers, such as the image carriers described in US Pat. No. 3,415,644, or other integral ones Image carrier applicable to the production of a black and white image.

k For the alkaline working or developer solution, which Is contained in the tear-open container, it is the commonly used aqueous solution of an alkaline active compound, e.g., sodium hydroxide, sodium carbonate or an amine, e.g., diethylamine, are preferred having a pH above 12, and an aromatic primary amine color developing agent such as a p-phenylenediamine developing agent. The working fluid preferably contains a viscosity increasing compound such as a high molecular weight polymer, e.g., one soluble in water Ether, which is inert to alkaline solutions,

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e.g., hydroxyethyl cellulose or an alkali metal salt of carboxymethyl cellulose, e.g., sodium carboxymethyl cellulose. The concentration of the viscosity-increasing compound is preferably one to about five percent by weight based on the weight of the working or developing solution so that the viscosity of the working fluid is about 100 cps. up to about 2OO 000 cps. amounts to.

The alkaline developing solution can, as mentioned above, in a tearable container of the photographic Film unit are available to put the developer solution between the transparent developer element and the photosensitive To be able to introduce element in a particularly simple manner. However, other methods of introduction can also be used and distributing the developer solution into the image carrier the film unit may be provided, such as by injecting the developer solution with the aid of associated parts, which are medical syringes very fine.

The permeable to alkaline solutions; The substantially opaque light reflective layer of the above-described photographic film unit may contain any opacifying agent dispersed in a binder. Opacifiers which have proven to be particularly advantageous for this layer are those which form white, light-reflecting layers, since in this way, from an aesthetic point of view, a pleasing background is created from which the transferred dye image stands out well and which also has the desired optical properties possesses in order to be able to reflect the radiation falling on it. Suitable opacifiers for the

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opaque, reflective layers are, for example, titanium dioxide, Barium sulfate, zinc oxide, barium stearate, silver flakes. Silicates, aluminum oxide, zirconium oxide, zirconium acetylacetate, Sodium zirconium sulfate, kaolin, mica, or mixtures thereof in widely varying amounts depending on the grade of the light-reflecting layer desired opacity. The opacifiers can be present dispersed in conventional binders, as long as only these form a layer, which is permeable to the alkaline working solution. The binder of this layer can advantageously consist of gelatin or polyvinyl alcohol, for example. It is desirable to adjust the haze capacity or the degree of opacity of the light reflective layer increase, these dark colored opacifiers such as carbon black, nigrosine dyes and the like can be incorporated. Another possibility, the_, opacity capacity or opacity To increase the light-reflecting layer, there is a special opaque layer underneath it to arrange that for the alkaline working solution is permeable and consists of a binder in which e.g. carbon black or nigrosine dyes are dispersed. The binder this layer can, for example, also consist of gelatin or polyvinyl alcohol. It has proven to be useful if the opaque light-reflecting layer in general has a density of at least four, preferably greater than seven, and is useful for actinic radiation is impermeable.

The above-mentioned transparent developing element and the transparent support for the photosensitive element can be made of any transparent substance, as long as that substance does not have an adverse effect on the

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produces photographic properties of the film unit and is dimensionally stable. Typical, for actinic radiation permeable, flexible support consists of cellulose nitrate film, cellulose acetate film, poly (vinyl acetal) film, polystyrene film, poly (ethylene terephthalate) film, polycarbonate film, poly-x ^ -olefin, e.g. polyethylene and polypropylene film, and other polymers, as well of glass. In this latter case ^only%, the photosensitive member would be sufficiently resilient to be able to adapt to the generated from the developing solution layer.

The individual elements of the above-described photographic film unit are selected and designed so that they have an attractive outer shape or that they are stiff enough to be handled both within as well as outside of the camera. However, the structure is also suitable for handling by photographic devices The camera has been chosen to be sufficiently flexible so that it can spring back into the its starting position again recovered. In the preferred photographic film unit, the top or bottom view exposed through the developer element and from the underside through the transparent support of the photosensitive Element is viewed, the photosensitive part of the image carrier, the film unit and whatever remains Negative image after development on the upper side due to the opacifier applied and on the lower side hidden by the opaque light-reflecting layer.

Problem statement
Despite its extremely simple design, the previously

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wrote image carriers many of the considerable difficulties that the previous integral image carriers have for the production of finished photographic images. For example, reference should only be made to one extremely difficult problem which arises in the known integral image carrier 3 ^{1 shown in FIG.}

fc borrowed element and contribute to the developer element distributed working solution. The individual components of this well-known Image carrier 3 'are designated with slightly modified reference numbers, which their relationship to corresponding components of the present integral image carrier 3 described above are intended to indicate. In the known one shown in FIG Image carrier 3 'has unexpectedly been found that the spacers 65 on the "finished photographic image are visible, although they are completely arranged between the opaque layers of the image carrier. Furthermore For example, it has been found that any significant surface structure of the spacers is due to the movement the film unit through between the pressure hulls onto the

w The force acting on the image carrier penetrates to the light-sensitive element and developer element and becomes visible there. Finally, with these known image carriers, another disadvantage caused by the spacers 65 can be observed, which is far less acceptable. After drying or other removal of the working solution distributed between the two elements of the image carrier, the two elements of the image carrier return to their original position with mutual contact due to their elasticity. This has the consequence that

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the central part of the image carrier is set back in relation to its lateral edges / so that a stepped Surface of the image carrier results.

2098-12 / tt-t2

Claims (1)

- 28 - · PATE NT CLAIMS ^ See the photographic film unit for the production of a finished photographic image with an integral image carrier which has a photosensitive element, which has a photosensitive layer arranged on a support, in which upon exposure of a central, an area enclosed by a frame creates a latent image, and that with a W ended developer member is connected, which contributes for the development of the latent image, the one used in this case photographic camera is initiated during passage of the film unit between two pressing bodies of a developer distributing means for distributing a developing agent contained in a container between the two elements, ^ characterized characterized in that the photosensitive element (5) and the developer element (7) of the image carrier (3) in the area of the frame (15, 20) surrounding the central image area (16) are at least partially non-detachable and that they are connected to one another before and after the exposure fully completed k Develop a completely flat image carrier with im Form cross-section of uniform thickness. 2) film unit according to claim 1, characterized in that the two elements (5, 7) at their facing, im Edge area (11, 13, 15, 20) lying surfaces are inextricably connected to one another. 3) film unit according to claim 1 or 2, characterized in that the two elements (5, 7) at least along a part their side edges (15) extending in the longitudinal direction from the front to the rear end of the image carrier are connected to one another are. 209812/1112 _ OQ _ 4) film unit according to claim 3, characterized in that the junction between the two, elements (5, 7) of the image carrier (3) forms an essentially water-impermeable seal (21). 5) film unit according to one of claims 1 to 4, characterized in that that the photosensitive element '(5) and the Entwieklerelernent (7) on the preferably front, the Container (45) for the developer substance facing end (9) of the image carrier (3) a supply of the developer substance Form a permissible seam between the two elements. 6) film unit according to one of claims 1 to 5, characterized in that that the two elements (5, 7) are designed to be flexible in their respective central regions (16) and over the period of the distribution of the developer substance until it is removed from the space between the both elements are elastically deformable. 7) film unit according to claim 6, characterized in that the two elements (5, 7) due to their elasticity the distribution of the developer substance in its central area by an amount of preferably 0.08 mm apart are movable. 8) film unit according to one of claims 1 to 7, characterized in that that the junction (21) between the two elements (5, 7) using a pressure appealing binder is made. 209812/1112 9) film unit according to one of claims 1 to 8, characterized in that the photosensitive element (5) and the developer element (7) at the preferably rear, facing away from the container (45) for the developer substance The end (11) of the image carrier (3) form a seam which prevents excess developer substance from flowing out from the space between the elements (5, 7) into a trap (39) provided for this purpose. 209812/1112