DE2243753A1 - PHOTOGRAPHIC FILM UNIT FOR THE PRODUCTION OF A FINISHED PHOTOGRAPHIC IMAGE - Google Patents

Description

Photographic film unit for the production of a

finished photograph! see picture. .

The invention relates to a photographic film unit for the production of a finished photographic one. Picture with an image recording part, a feeder for feeding a flowable developing agent on the image recording part and a collecting device for collecting excess developer substance.

Photographic film units and phot ο graphic film associations are known to contain the materials necessary for the development effected immediately after exposure to create positive photographic images in the form of either reflective or transparent images.

For example, from the German Offenlegungsschrift 2 041 202 a pre-registered integral film unit (in which two sheets of the image recording part are already in correctly positioned correspondence are brought and permanently stay together in this situation) known that one is permanently on The developer supply container attached to the leading end of the image recording part (sometimes referred to as "pod") for the developing agent as well as at the rear end of the image recording part a developer collecting container (sometimes called a "liquid trap" designated) for excess developer substance. The rear end of the photosensitive element of the image recording part has a recess that is a allows to take up a fixed volume of excess developer substance. Above the recess is a comb-like one Element provided, the spaces between the comb teeth also have a fixed volume Ability to absorb excess developer substance. The rear end is surrounded by a sheet material that the includes fixed developer volumes and the ability to accommodate a further expandable volume of developer substance offers. According to one embodiment of this known film unit is within the expandable volume part

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ORIGINAL INSPECTED

a reciprocating element is provided which allows spreading causes the pressure hull commonly used to initiate development and within the expandable Partly by volume the flow of the developer substance from one Side of the pressure hull column to the other side allows.

The containers known from this laid-open specification have the disadvantage that they appear aesthetically unsightly and after can be easily damaged after development has ended. So is located z. B. according to one embodiment of this known film unit, the reciprocating element loosely in the envelope, which is disadvantageous both during manufacture and afterwards.

It is an object of the invention to provide a photographic film unit to specify for the production of a finished photographic image, which is characterized by a with regard to production and mode of operation and aesthetic appearance, greatly improved developer catcher excels.

The invention is based on the knowledge that the specified task can be solved by the developer collecting container is designed and protected in a certain way.

The invention relates to a photographic film unit for the production of a finished photographic image with an image recording part, a feeder for feeding a flowable developing agent on the image recording part and a collecting device for collecting excess developer substance, which is characterized by a Developer collecting device made up of a bubble and one provided outside the bubble, and these against external compression forces protective frame part.

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By, the invention is achieved that the developer collecting container "forming bubble designed as a unified structure and attached to the components of the image recording part can be. It is also advantageous that, since the bladder is a uniform structure, the number of adhesions and sealing with other, structural elements is kept low. It also proves to be advantageous that the frame part for Protection of the bladder against external compressive forces is arranged outside the bladder, so that the bladder against crushing is protected, which has a beneficial effect as a squeezing to a splash of the developer substance and / or a flowing back of the developer substance into the image recording part with an adverse influence of the developed image. There is also another advantage that by attaching the frame part outside the bladder the construction and assembly of the film unit is simplified.

The frame part provided outside the bladder can have a skeleton or framework structure, which has the advantage that the bubble after the flow of the developer substance expand into the cavities formed by the skeletal structure can.

The skeletal structure can be partially from an 'end portion of the photosensitive member of the image recording part is formed extending into the developer collecting device, this end portion of the photosensitive element having at least one opening. The use of the egg section of the photosensitive member to build the skeletal structure has the advantage that the number of components required is reduced, and that the uniformity and Closure between developer collecting device and image recording part is enlarged and improved.

The skeletal structure can also be partially formed by an end portion

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of the developer sheet of the image recording part, which is included in the Developer collecting device protrudes, are formed, wherein this end section of the developer sheet has at least one opening. This in turn has the advantage that the The number of components required is reduced and the uniformity and cohesion between the developer collecting device is reduced and the image recording part is increased. As special It has proven advantageous if end sections of both the developer sheet and the photosensitive element contribute at least partially to the construction of the skeletal structure and the bladder is arranged between the two end sections will.

On the side of the end section of the developer blade facing away from the bubble a frame-like element can be provided, which advantageously leads to the fact that the cavity volume, into which the bladder can expand.

The frame-like element can be designed in the form of a comb and arranged in such a way that the back of the comb is at the rear end of the film unit and the comb teeth are directed towards the imaging areas, wherein the free ends of the comb teeth are conveniently beveled Have front surfaces to spread the to Initiation of the development used to support pressure hulls. Such an arrangement not only has the advantage that the cavity volume into which the bladder can expand is increased, but also the additional advantage that the spreading of the pressure bodies is promoted during the initiation of the development when the film unit is passed through the gap formed by the pressure hulls.

The frame part provided outside the bladder to protect it can be provided with a cover on the outside. Will one of these

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term cover provided, this has the advantage that the Bladder is even better protected. One such cover is advantageously formed from a rigid material and used for Suitable for labeling on their outer surface.

Preferably, the cover has ventilation openings that allow air to escape. Such vents prevent the cover from swelling like a balloon, when developer enters the bladder and causes an expansion of the bladder, and they also prevent pressure from building up inside the cover on the outside of the bladder forms, which could lead to a reflux of the developer substance.

The bladder can be provided with openings to prevent the escape of gas, but not allow the passage of developer substance. This has the advantage that the volume of the bladder can be kept as small as possible in order to ensure that excess developer substance is absorbed and its escape is prevented.

The bladder can be in the form of a practically rectangular "sheet-like" Body "be formed from flexible material, which is folded in the middle and sealed on the sides adjacent to the gap, with one of the free edges of the sheet material on the developer sheet of the image recording part and the other free edge on the photosensitive element of the image recording part are attached. A bladder designed in this way has the advantage of being particularly easy to manufacture be.

An advantageous embodiment of the film unit according to the invention is illustrated in more detail by the accompanying drawing, in the represent:

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Pig. 1 is a perspective view of a photographic film unit according to the invention

Figure 2 is an exploded perspective view of the developer catcher bearing end of the in Pig. 1 film unit shown,

3 shows an enlarged partial cross section of the Developer catcher of the type shown in FIG Film unit before starting development,

Fig. 4 is a cross-section similar to that in Pig. 3 »which shows how the film unit is passed between the pressure rollers of a camera in order to spread the developer substance and to press ^{excess developer substance into the inflatable bladder of the developer collecting device -ge- 1,}

5 is a cross-section similar to that in FIGS. 3 and 4, showing the film unit after the developer substance has been completely spread out and all excess developer substance has been pressed into the expandable bladder by means of the pressure rollers, the pressure rollers being in one position, WO they are pressed apart from the developer collecting device in order to prevent that they compress the bladder, and

Fig. 6 is a perspective view of expansion means according to a further embodiment, which for installation in the Developer collecting container of the film unit shown in Figures 1 to 5 are determined.

As self-developing photographic film units and film associations are known, a detailed description should

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special on the new features according to the invention and on those features are restricted that are directly related to the features according to the invention. Special features of Cameras in which film units according to the invention can be used, and of film units and photographic film assemblies, therefore, which are not shown or described in detail, are of conventional known types.

The film unit shown in the figures consists of an image recording part 8, one at the leading end of the image recording part provided developer supply device (sometimes called "pod"), which contains a flowable developer substance 11 contains, as well as a developer collecting device 6 (sometimes called "liquid trap"), which is intended to absorb excess developer substance and at the rear end of the Film unit is provided. The individual elements of the image recording part 8 are described in the Belgian patent 757 959 explained and described in more detail. The image recording part 8 is of the pre-registered and integral type and has a photosensitive capable of image recording Element 12 and a developer sheet 14 to facilitate the distribution of the developer substance. The components photosensitive element 12 and developer sheet 14 are already in place assigned to one another in the correct position prior to exposure and remain as cut to one another even after development and laminated sandwich-like structure practically in the form shown in the figures. The light sensitive Element 12 consists of a transparent layer support, on which the following layers are usually applied in the order given: an image receiving or recording layer, an opaque reflective layer, and at least one, preferably three silver halide emulsion layers, which are associated with or contain a material capable of color image formation. That Developer sheet 14 is made of a transparent fabric, e.g. B.

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a cellulose triacetate film and enables exposure of the photosensitive member 12 from the top, i. H. the one in Pig. 1, the film unit. The light sensitive Element 12 and developer sheet 14 are preferably, although not necessarily, rectangular and of the same length and width and are held in the correct, mutually assigned position either by a direct one Sealing on the edges or with the help of adhesive joints between spacers provided along the two edges and the rear end of the film unit.

The breakable developer supply container provided in the film unit 10 can be designed in a wide variety of ways and usually consists of a rectangular sheet-like Component 16 made of a vapor-impermeable material, which is folded along a center line 18 and along the two side edges 20 is tightly sealed or closed. The opposite free ends of the folded center line 18 web-like components 16 are aligned in the correct position and practically along their entire length with a breakable seal which breaks open and out of the developer supply container It 10 releases developer substance 11 upon application of compression pressures generated by the developer supply container between a pair of opposing pressure hulls, ζ. B. pressure rollers 24 (see. The figures 4 and 5) »is passed through in a camera. The developer supply container 10 is attached to the leading end of the image recording part 8 in such a manner or otherwise in a for Put together a suitable position that the developer substance 11 contained in it between the photosensitive element 12 and developer sheet 14 is emptied, which z. B. can be caused by the fact that a developer supply container flattened discharge mouth is provided, which is in the between the photosensitive element and the developer sheet gap formed at the leading end of the image recording part

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is used. After exposure, it becomes an opacifier containing developer substance 11 emptied from the developer supply container 10 and in the form of a uniform Layer at least over the exposure area of the photosensitive Element 12 spread out by passing the entire film unit between the pressure rollers 24. The fat the developer layer is precisely controllable with the help of. on the pressure rollers 24 provided outer zones 25, which the central portions of the rollers at the desired distance apart, with these central sections corresponding to that region of the image recording part correspond in which the developer substance is to be distributed. Due to the presence of turbidity

the

The light-sensitive element of the image-recording part S of the opaque developer emulsion becomes the medium in / developer substance coated and insensitive to light, so that the film unit during the completion of the development process can be removed from the camera. The developer 11 diffuses into the silver halide emulsion layers of the photosensitive element 12 and causes its image-wise development or, if it is the developing agent is an activator, initiates this development. That in every silver halide emulsion layer or in one of these Adjacent layers of color imaging material each form as a function of imagewise exposure Silver halide emulsion layer in imagewise distribution a diffusible dye image. At least part of the imagewise distributed diffusible dye image diffuses into the image receiving layer to form a positive one Color image. The positive .image becomes through the transparent Considered the layer support of the photosensitive element, it appears as a right-side readable image on the opaque Background reflective layer. The image receiving layer need not be stripped from the remainder of the inventive film unit to become and adhering to a certain development time also turns out to be superfluous.

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The developer collecting device 6 is at the rear end of the Image recording parts 8 are provided and for recording and Delimitation of excess developing substance 11 is determined, so that the camera or the photographer is stained by the developing agent.

As can be seen in particular from FIG. 2, the rear end sections 12a and 14a are light-sensitive Element 12 or of the developer sheet 14 with one or a plurality of openings 26 and 28, respectively, and between these end sections is in the correct orientation with openings 26 and 28 an inflatable bladder 30 in a sandwich-like or fitted arrangement. The bladder 30 consists of a rectangular sheet-like component made of a suitable, solid, flexible material, e.g. B. polyethylene, which is inert to the developer substance. The free ends 32 of this web-like component lie in a position « right on top of one another and are attached to the photosensitive element 12 and to the developer sheet 14 with the aid of an adhesive. The side edges 34 of the bladder 30 are with one another firmly connected to form a pocket-like housing that can accommodate excess developer substance 11, which enters through a mouth 36 formed between the free edges of the bladder. The openings 26 and 28 form Cavities into which the bladder 30 can expand when developing agent is pressed into it. In order to facilitate the entry of the developer substance into the bladder 30, the formation of a backwater is reduced by providing vent holes or slots 37 of such size that air, but not developer substance, can pass through them. Usually it can be in the bladder 30 do not develop any air back pressure, as this in its IFig. 3 is flat normal state shown free of air. It is possible, however, that air together with the developer substance 11 is inserted into the bladder.

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BAO ORIGfNAl

To create additional space for the bladder to expand a frame-like spacer 38 is provided, which is made of any suitable material, e.g. B. plastic or cardboard, and has one or more openings 40. This spacer is through a or both outer surfaces of the photosensitive element 12 or of the developer sheet 14 is held in the correct position with the bubble 30 and the openings 26 and 28.

Although either the photosensitive element 12 or the developer sheet 14 has multiple openings, e.g. B. the one in Fig. 2 may have openings 26 shown, with intermediate reinforcing ribs 42, the use of a single opening prove to be particularly advantageous, since this creates a larger space for the bladder to expand will. Although the openings 26 in Fig. 2 as rectangular recesses as shown, they can also have any other suitable shape. The spacer 38 is according to FIG The illustrated embodiment of the invention is provided with a plurality of openings 40, between which there are reinforcing ribs 44 are located. However, such reinforcing ribs do not need to be provided and the spacer can optionally have only a single correspondingly large opening. On the other hand, if such ribs 44 are provided, so they are preferably not in positional correspondence with those provided in the photosensitive element 12 Ribs 42 to facilitate the lateral spreading of the developer substance within the bladder 30. Although the spacer 38 as a rectangular component with openings provided therein 40 is shown, can also have a different configuration be present and one of the elongate side members 46 can be omitted, so that the comb-like spacer shown in FIG 47 arises, which has several fingers49 with beveled ends.

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As particularly illustrated in FIG. 5, the soft and pliable bladder 30 is expanded by supplied excess developer substance 11 and then extends into and possibly also through the spacer openings 40 and the openings 26 and 28 of the photosensitive element 12 or of the developer sheet 14 To protect the expanded bladder 30 from accidental damage and to create a flat, rigid and practically non-crushable surface which can also be provided with lettering, a stiff, shell-like frame part 48 with a practically U-shaped cross-section is provided outside the bladder, which can be pushed over the ends of the components 12, 14 and 38. Serving as a cover frame part 48 consists of a rigid material, for. B. plastic, and is held in a particularly advantageous manner in that the side parts 50 of the frame part 48 are attached to the photosensitive element 12, developer sheet 14 and spacer 38 by means of ultrasound or other suitable fastening means. Since the developer catching device 6 is thicker than the combination of photosensitive element 12 and developer sheet 14 in the image recording area, at least one of the two sides of the developer ^{catching device, ie either the top or the bottom, is provided with a beveled ramp 52, around the di 1} UCkWaIzen 24 apart to spread and to facilitate the movement of the developer collecting device through the pressure rollers (see. The figures). The cover part 50 is provided with ventilation openings 51 through which air located in the collecting device and the bladder 30 can escape.

As can be seen, the pressure rollers 24 are prevented from compressing the bladder, even if they are partially or completely is filled because the perforated end portions of the photosensitive member 12, the developer sheet 14 and spacer 38 are not compressible and in

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are designed such that they cause the bladder 30 to expand can. If the pressure rollers were not prevented from compressing the developing substance-containing bubble, so the developing agent could be in the image recording part pushed back and adversely affected or the bubble burst.

The side of the frame part which is at the bottom in the figures, from which the finished photographic image is viewed, can be provided with lines in order to facilitate the labeling of the cover part 50 with information relating to the photographic image. The cover part 50 is made of stiff material, but its inner, frame-like structure gives it additional rigidity, which is of particular advantage when writing is to be carried out on it.

Although, according to the embodiment of the invention illustrated by the figures, the bubble is arranged between the apertured end portions of the two sheets of the image recording part, namely between the photosensitive element and the developer sheet, the bubble need not of course be configured in the specified sandwich-like shape, but can extend beyond the rear end of the two leaves, with its mouth portion arranged between the two leaves and connected to them »

It was found that developer collecting devices designed in the manner indicated can be smaller than such conventional known type, so that the overall size of the film units can be advantageously reduced, which in turn the result is that the construction is more suitable for this and more compact Cameras is facilitated.

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It is also advantageous that the inventively designed Developer catcher entirely within the aesthetically acceptable limits of the film unit is so that a separation of the developer collecting device is unnecessary after development.

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Claims (11)

Claims : 'iyPhotographisehe film unit for the production of a finished photographic image with an image recording part, a supply device for supplying a flowable desergent substance to the image recording part and a collecting device for receiving excess developer substance, characterized by a developer collecting device (6) from a bubble (30) and one outside the bladder provided and these opposite outer compressive forces protective frame member _(12a? 14a, 38, 47). 2. Photographic film unit according to claim 1, characterized in that that the frame part (12a, 14a, 38, 47) provided outside the bladder has a framework structure = 3 photographic film unit according to claim 2, characterized in that that the framework structure partially from the end portion (12a) of the photosensitive element (12) of the into the Entxvi ekler on catching device (6) extending Image recording part (8) is formed, this end portion having at least one opening (26). 4. Photographic film unit according to claims 2 and 3, characterized characterized in that the framework structure is partially from the end portion (14a) of the developer sheet (14) extending into the developer catcher (6) Image recording part (8) is formed, this end portion has at least one opening (40). 5. Photographic film unit according to claim 4, characterized in that that on the side of the end section (14a) of the developer sheet (14) facing away from the bladder (30) 309811/0845 BATH ORIGINAL a spacer in the form of a frame-like element (38) is provided. 6. Photographic film unit according to claim 5 »characterized in that that the spacer is designed in the form of a comb-like element (47) whose comb back the rear end of the film unit and its comb teeth (49) facing the image recording areas with the free ends of the comb teeth to aid in spreading apart the pressure body (24) used to initiate development is provided with beveled front surfaces are. 7. Photographic film unit according to claims 1 to 6, characterized in that over the outer surfaces of the outside The frame part (12a, 14a, 38, 47) provided for the bladder (30) is provided with a cover (48) to protect the bladder is. 8. Photographic film unit according to claim 7 »characterized in that that the cover (48) consists of a rigid material and is suitable for writing on one of its outer surfaces is. 9. Photographic film unit according to claims 7 and 8, characterized in that the cover (48) with the escape of air permitting vent openings (51) is provided. 10. Photographic film unit according to claims 1 to 9 »characterized in that the bladder (30) with the escape of gas, but not ventilation openings (37) which allow the passage of developer substance. 11. Photographic film unit according to claims 1 to 10, characterized in that the bladder (30) consists of one 309811/0845 flexible material existing practically rectangular sheet is formed, which is folded in the middle and sealed at the side edges (34 ·) lying adjacent to the fold is -, with one of the free edges (32) of this sheet at Developer sheet of the image recording part and the other free edge (32) on the photosensitive element of the image recording part is attached. 30981 1/0845