JPH02291546A - Instant photographing device - Google Patents

Abstract

PURPOSE:To make the gradations of an image soft and to improve the reproducibility of a photograph, etc., by providing a 2nd exposing means which performs exposure for making the gradations of the image soft for a photosensitive beltlike material before or after exposure by an exposing means. CONSTITUTION:A 2nd exposing means is constituted by arranging a reflector 71 opposite a negative film 64 and also arranging a shield box 72 surrounding a light source 51 and further the reflector 71. The light emitted by the light source 51 is reflected by the reflector 71 and then reaches the surface of the negative film 64, so that the surface of the negative film 64 passing through a conveyance path is exposed slightly. Thus, the 2nd exposing means which performs the fine exposure is provided in addition to an exposing means which forms a latent image corresponding to a document image. Consequently, expo sure is carried out with the constant quantity of light of certain level and a high-density part is reduced in density to make the gradations of the image soft and improves the reproducibility of a photograph, etc., thereby obtaining an easy-to-see image.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention involves separating a roll of photosensitive strip material one by one to form a photosensitive sheet, and combining the photosensitive sheet with a pod containing a developer. This invention relates to a beer-apart type instant photographic device in which the latent image formed on the photosensitive sheet is transferred to the image-receiving sheet and visualized by overlapping the photosensitive sheet with the image-receiving sheet and splitting the pods. [Prior Art] In an instant photographic device using this type of beer-apart type instant photographic film, a roll-shaped photosensitive strip material (hereinafter referred to as negative film) is pulled out to an exposure position and exposed, and a negative film is formed into a predetermined length. A photoreceptive sheet (hereinafter referred to as a negative sheet) formed by cutting a film and an image receiving sheet (hereinafter referred to as a positive sheet) that is conveyed at a certain timing from a predetermined position are heated using a developer. The sealed pods are sandwiched and stacked one on top of the other, and the sealing part of the pods is opened using roller pressure, and the developer is evenly spread between the two to develop the latent image formed on the negative and to form a positive image. An image is formed by transferring the latent image to the surface. [Problems to be Solved by the Invention] By the way, in the above-mentioned conventional instant photographic device, when a silver halide photographic print is used as an original, the resulting image is a higher-contrast image (with high density areas) than the original image. The density becomes higher and the reproducibility of low contrast areas becomes worse). As a result, the image gives a negative impression. This invention was made in view of the actual state of the prior art as described above, and an object of the present invention is to provide an instant photographic device that can obtain soft-tone images even when a silver halide photograph is used for the original. do.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a second method for exposing the photosensitive band material to light for softening the image before or after exposure by the exposure means for exposing the original image to light.
An exposure means is provided.

[For production]

According to the above means, in addition to the exposure means that forms a latent image according to the original image, the second exposure means that performs slight exposure is provided, so that exposure with a constant amount of light at a certain level is performed. , high-density areas are made low-density, resulting in a soft image. Therefore, the reproducibility of photographs, etc. can be improved and images that are easy to view can be obtained. [Embodiment] Overall configuration of copying machine> A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of a beer apartment type instant photographic device.

In the figure, the instant photography apparatus includes an optical system unit 1 that irradiates illumination light while scanning the surface of a document and forms an image at a predetermined position (exposure surface), and a negative sheet that is conveyed to the predetermined position and exposed to light. , and further includes a conveyance unit 2 that aligns and overlaps the body sheet, spreads the developer therebetween, and transfers and forms an image on the body sheet.

An outline of the internal structure of the instant photographic device will be explained below.

The optical system unit 1 includes a contact glass 3, a first traveling body 4 consisting of a first mirror and a light source, a second traveling body 5 consisting of a second mirror and a third mirror, a lens 6, and a fourth traveling body 4.
A third traveling body 7 consisting of a mirror and a fifth mirror, and a sixth
It consists of a mirror 10, etc. First running body 4
A fluorescent lamp (preferably one for color rendering, etc. is used to improve color reproduction) is used as the light source arranged in the contact glass 3.
The document placed face down is irradiated while being scanned parallel to the contact glass 3. The second running body 5 is the first running body 4
The optical path length from the document surface to the exposure surface is kept constant. Furthermore, the magnification and conjugate length during zooming are adjusted by moving the lens 6 and the third traveling body 7. The reflected light from the original is reflected by the first, second, and third mirrors, and further passes through the lens 6, fourth, fifth, and sixth mirrors, and is subjected to slit exposure at the exposure position A.

The conveying unit 2 includes a feeding section 18 for the negative film 64;
A cutter section 20 that cuts the fed-out negative film 64
, negative sheet conveyance/exposure section 21 , positive sheet conveyance section 50
, a second exposure light source 51 and a developing section 60.

The feeding section 18 includes a pair of drawing rollers 18a. 18b, and a cutter portion 20 is further provided on the downstream side in the negative film transport direction. The cutter section 20 consists of a fixed blade 20b and a rotary blade 20a provided opposite to the fixed blade 20b.
The sheet is cut into a preset sheet length according to a command from C P UIIO, which will be described later.

The negative sheet conveyance/exposure section 21 includes an exposure section A formed on a flat surface over the entire slit area, a pair of intermediate rollers 27, a large diameter roller 28, and a guide plate 31a. 3
lb, and these guide plates 31a, 3lb negative film 64! Two roller pairs 26. 52, and an intermediate roller pair 2
7 to the outer periphery of the large diameter roller 28 and the guide plate 31a.
A conveying path for the negative film 64 is formed along 3 lbs.

The light source 51 is provided before the exposure section 21 and forms a second exposure means, and the photosensitive sheet is connected to the optical system unit l.
It is used to perform slight exposure before exposure is performed. In FIG. 1, the light source 5l is a negative film 64.
Although weak light is directly irradiated to the target, a configuration may be adopted in which indirect light is irradiated, as shown in FIG.

The configuration of the second exposure means shown in FIG.
A reflector 7l is disposed at a portion facing the light source 51, and a shielding box 72 is disposed to surround the light source 51 and the reflector 71. The light emitted from the light source 51 is reflected by the reflector 71 and then reaches the surface of the negative film 64 to perform slight exposure on the surface of the negative film 64 as it passes through the conveyance path.The light amount is adjusted by the light aSt. This is done by adjusting the irradiation angle. This slight exposure makes the entire image soft.

The light source 51 can be of any type as long as it can uniformly expose the surface of the negative film 64 (for example, a cold cathode tube,
electroluminescence, etc.). However, when the negative film 64 is color, depending on the type of light source 51, the emission wavelength may be the same as the sensitivity distribution of the film.
It is necessary to correct the wavelength using a filter or the like.

Further, since it is sufficient to perform a slight exposure, an ND (neutral density) filter is used to attenuate the light amount, if necessary, in order to reduce the amount of light to a very small amount.

This light! By making the attenuation change continuously,
User's favorite image can be obtained.

In FIG. 7, the reflector 71 is configured to form a part of the shielding body 72, but as shown in FIG. You may also do so. In this case, the light amount is adjusted using the reflector plate 73.
This is done by adjusting the angle of the

The image transfer section 50 is provided to protrude from the inside of the machine to the outside of the machine, and includes a lower guide plate 35 on which the image sheets 14 are placed in an initial state, and a body extending from the inner end of the lower guide plate 35 to the developing section 60. The guide plate 36a of the adjusted position 14,
36b, and two guide plates 36a. It is mainly composed of an insertion slot-ra pair 38 that protrudes into the space sandwiched between the slots 36b and 36b and transports the body l4.

The developing section 60 includes a pair of developing rollers 30a and 30b,
It mainly consists of an arm 46 that supports the developing roller 30b and rotates around a pin 54 in accordance with the operation of the cam 45 to move the developing roller 30b toward and away from the opposing developing roller 30a. There is.

Overview of Instant Photographic Film> Before explaining the details of the operation and structure, an overview of the negative film 64 and body 14 used will be described. 2 and 3 are perspective views of the negative film 64 and the negative sheet 11, respectively, and FIG. 3 is a perspective view of the positive eye 4. FIG.

The instant photographic film used in this apparatus consists of a negative film 64, a photographic paper 14, and a bag (hereinafter referred to as a pod 15) in which a developer is sealed. After the negative film 64 is slightly exposed by the light source 51 of the second exposure means, it is conveyed to the first exposure section 21 and exposed by the optical system unit 1 to form a latent image. Thereafter, one latent image forming surface of the negative film 64 on which the latent image has been formed is cut by the cutter section 20 to form a negative sheet 11. Next, negative sheet 11
The latent image forming surface of and the image receiving surface of the positive spot 14 are aligned,
In the combined state, the developing roller 30a. It passes between 30b pairs. During this passage, the developing rollers 30a, 30b
Due to the roller pressure of the developing rollers 30a, the rear end of the pod 15, which had been attached in advance to the front end of the binding sheet 14, ruptures, and the developer flows out from the inside of the pod 15, causing the developing roller 30a. 30b, it is evenly spread between the positive sheet 14 and the negative sheet 11. Development is started by the spread of this developer,
The negative sheet 1l develops color in several tens of seconds, and the coloring agent is transferred onto the positive sheet 14. After the transfer, when the negative sheet 11 is peeled off from the positive sheet 14, a positive color image is obtained on the positive sheet 14.

The negative film 64 is a long film, wound into a roll with the latent image forming surface facing inside, and has a light scattering property, so it is housed in a light shielding container 63 and shielded from light. And each time an image is created,
The end portion of the negative film 64 is pulled out by a certain length by the pull-out rollers 18a and 18b, and exposed and a latent image is formed over the image forming area 73 shown by the dashed line in FIG. A negative sheet 11 is formed by cutting into a sheet.

The body sheet 14 is formed to have the required image receiving area and is pasted on the carrier sheet 13 as shown in FIG. This pasting is done in a removable manner so that the image receiving surface is on the outside. In this case, if an image receiving body 14 having the same area as the carrier sheet 13 is used, the carrier seam 3 can be made unnecessary, but when the body 14 is thin,
Alternatively, when a transparent cover sheet 14 is used, room light enters from the back side of the sheet during the development process, causing a fogging phenomenon. To prevent this, it is necessary to add a light shielding member to the positive sheet 14. Therefore, carrier sheet 13
plays the role of this light shielding member.

The carrier seat 13 is slightly larger than the body seat 14, and has extra lengths C, D, and E at the tip, both sides, and rear end.
The above-mentioned pod 15 is attached to the tip end of the carrier sheet 13 which is the most upstream side in the transport direction. As a result, in this embodiment, the carrier seat 13
constitutes the supply means for pod l5. Since the aforementioned cleavage portion of the pod 15 is formed at the rear end portion B of the pod 15, which is the most downstream side in the transport direction, the developer is difficult to spread over the entire length of the pod 15 in the longitudinal direction. Furthermore, after the pod 15 is torn open, some run-up distance is required for the developer to spread to both sides of the body sheet 14. Therefore, during this run-up distance, good image formation over the entire width of the positive stitch 4, that is, image transfer from the negative sheet 11, cannot be performed, so image formation is performed with a shift by the run-up distance shown in FIG. 3C. The amount of developer sealed in the pod 15 is larger than that required for image formation so that the developer is sufficiently distributed to the rear end of the body 4. Remove excess developer from both negative and positive sheets 11. The rear end between 14 (D, D in the figure)
11. The developing roller 30a. 30b etc. to prevent it from adhering.

<Conveyance Unit> The details of the conveyance unit 2 will be explained together with its operation.

The conveyance unit 2 is constructed approximately as described above, and the negative film 64, which has the same width as the body sheet and which is wound into a roll and stored in the light-shielding container 63, is transported by the pull-out roller 18a,
It is held between the rollers 18b and conveyed to the intermediate roller pair 27 through the exposure section A by the rotation of the two.

When the leading edge of the conveyed negative film 64 is detected by the sensor 25 or after a certain period of time, the first traveling body 4 and the second traveling body 5 scan, and the negative film 64 is exposed at the exposure section A on the temporary guide 24. A latent image is formed.

The exposure part A is formed as a flat surface over the slit area, and is set to be equal to or higher than the nip height of the pair of pull-out rollers 18 and the pair of intermediate rollers 27. The circumferential speed of the intermediate roller pair 27 is set to be slightly faster than the circumferential speed of the pull-out roller pair 18, and the rollers of the pull-out roller pair 18 are provided with an overrun mechanism.

With the above configuration, the negative film 64 is conveyed with some tension over the exposure section Δ, and is conveyed while being brought into close contact with the guide plate 24.

As a result, the optical path length to the negative film surface and the transport speed are kept constant.

The negative film 64, which has been exposed for a certain length and a latent image has been formed, is temporarily stopped, and then the rotating blade 20a is moved to the fixed blade 20b.
The material is cut into sheets by rotating it while in contact with the material. This stop timing is determined by counting the time t after the sensor 25 detects the leading edge of the Kaneka film 64.

Although the scanning speed of the optical system changes due to zooming, the conveying speed of the negative film 64 is constant.
After a predetermined time t has elapsed from the detection of the leading edge of the negative film 64, the conveyance of the negative film 64 is stopped and cutting is performed to obtain a negative film 1 of a predetermined length. Therefore, a latent image cannot be formed on the rear end of the cut negative sheet 11 for a distance greater than at least the distance from the exposure position A to the tip of the fixed blade 20b. However, the exposure position A, the rotary blade 20a, and the fixed blade 20b are arranged so that this distance is smaller than the distance (D in FIG. 3) to the rear end of the image area to be transferred onto the body 14, which will be described later. In any case, since this is an area where image formation is unnecessary,
It is possible to prevent the negative film 64 from being wasted (cutting it to an unnecessary length or longer), and the above-mentioned problems can be solved.

Similarly, the tip of the cut negative sheet 11 cannot form a latent image at least at a distance longer than the distance from the detection position by the sensor 25 to the exposure position A;
If the exposure position A and the sensor 25 are arranged so that the distance from the tip of the sheet 1 to the tip of the latent image formed on the negative sheet 11 is smaller than the distance (C" in FIG. 2), the negative It is possible to prevent the film 64 from being wasted.Furthermore, in the above method, after the exposure is completely completed, the negative film 64 is
If cutting is performed during exposure in order to cut the material, it is possible to prevent the transport speed from changing due to the impact of the cutting.

The cut negative sheet 11 is transferred to the roller 28 and the guide plate 2.
After being turned about 180 degrees by 9, the roller pair 26
A pair of rollers 52 whose tips have stopped rotating due to
It is conveyed until it comes into contact with. The above-mentioned conveyance, exposure, and cutting of the negative film 64 and the negative sheet 11 are carried out in a dark place inside the instant photographic apparatus, which is formed by blocking external light by the exterior of the instant photographic apparatus.

The body 14 is transported before the negative film 64 is transported (exposed and cut). Unlike the negative sheet 11, the positive sheet 14 is not photosensitive and can be directly inserted from outside the machine. In this embodiment, position 1
4 are manually inserted one by one to the left along the lower guide plate 35 at the lower right of the main body in FIG. 1 together with the carrier sheet 13. Therefore, a paper feeding device, a separation device, a paper feeding cassette, etc. are not necessary, and the device itself can be formed inexpensively and compactly.

As shown in FIG. 1, the carrier sheet 13 and the body seat 14 are inserted into the machine along the lower guide plate 35 and guides on both sides (not shown), and the leading end of the carrier sheet 13 is inserted into the insertion slot. When detected by the sensor 37 provided immediately before the pair 38, the insertion port-ra pair 38 starts rotating. The rollers of this insertion slot-ra pair 38 are provided outside the pod 15 at a location where only both ends are gripped so as not to crush the pod 15 attached to the tip of the carrier sheet l3. Position 14 and carrier seat 1
3 is a guide plate 36a, 36 by an insertion port-ra pair 38.
When the leading end of the carrier sheet 13 hits the nip of the pair of developing rollers 30a and 30b, it stops. This stop timing is determined by the developing rollers 30a, 3
Sensor 4 installed just before the body transport direction of 0b
7 is determined by counting the time t after the leading edge of the carrier sheet 13 is detected.

The end of a light-shielding Mylar 66 is pasted over the entire width of the bent portion 36c on the entrance side of the guide plate 36a, and the rigidity of the Mylar 66 allows the guide plate 3 to be moved with a light downward force.
Pressed against 6b. The body sheet 14 and the carrier sheet l3 are conveyed while being rubbed by the tip of the mylar 66 and the guide plate 36b. Moreover, this guide plate 36a, 3
The conveyance path formed by 6b is bent at at least one place as described above.

By bending the bending portion 36c, etc., and blocking the transport path of the body sheet from light using Mylar 66, etc.,
This prevents the negative sheet 11 from being exposed to external light entering from the insertion opening of the positive sheet 14 or the conveyance path.

On the other hand, development in an instant photographic apparatus means uniformly spreading developer between the negative sheet 11 and the positive sheet 14, and for this purpose, the developing roller 30a.
Each of the rollers 30b is composed of a metal straight roller and a stepped metal roller having collar portions L+ and Lz, as shown in FIG. 4, and both are pressed with an appropriate force during rolling contact. In that case, the side edges E and E' of the negative sheet 11 and the carrier sheet 13 shown in FIGS. 2 and 3 are the empty portions L, L of the stepped metal roller (30b)! It is eaten and transported. At this time, the pod 15 is partially L, . Inside Lt, it is sandwiched between the negative sheet 11 and the positive sheet 14 and transported as one body. Also, pod 150
The developer 16 that flowed out due to the cleavage has a high viscosity, so as shown by the shaded area in FIG. 4, both seams}11. 14 until they come into close contact with the cylindrical surfaces of the metal straight roller (30a) and stepped metal roller (30b), respectively, and then
Expand 11 and 14. For this reason, both sheets 11.
The thickness of the developer between 14 and 14 is maintained at a constant thickness of about 0.1 fl.

The illustration of the spread developer in FIG. 4 is exaggerated for clarity.

In such a developing mechanism, the tip of the inserted carrier sheet 13 is connected to the developing rollers 30a, 30 as described above.
After hitting pair b and stopping, the above-described negative film 64 is transported, exposed, and cut. Then, the negative sheet abutted against the stopped pair of rollers 52 is moved to the guide plate 31a. After being bent by a certain amount at the enlarged portion of 3 lb, it is conveyed between the guide plates 33a and 33b by the rotation of the pair of rollers 52. By abutting against the roller pair 52 and bending it, the conveyance timing of the negative sheet 11 is adjusted, and the tip of the negative sheet 11 is aligned with the nib of the roller pair 52, thereby performing skew correction. The rotation start timing of the roller pair 52 is determined by counting the time t after the sensor 53 detects the leading edge of the negative sheet 11.

FIG. 5 is a schematic explanatory diagram showing the vicinity of the developing section 60, in which the developing rollers 30a. For the pair 30b, before the tip of the negative sheet 11 hits the nip of the pair of developing rollers 30a and 30b,
Sensors 53 provided before and after the roller pair 52 in the conveying direction
or 42 to start the rotation at the right time,
The carrier sheet 13 that has already been abutted is conveyed first. Thereafter, the leading edge of the negative sheet 11 reaches the nip between the developing rollers 30a and 30b due to the rotation of the roller pair 52, and both are transported at the circumferential speed of the developing roller pair 30a and 30b, so that the carrier sheet 13 and the negative A deviation J shown in FIG. 5 occurs at the tip of the finger 11.

Since this deviation J is controlled to be at least less than C in Fig. 3, compared to the conventional type in which the leading edges of both sheets 11 and 13 are aligned and developed, the deviation J is cut by this deviation iiJ. The length of the negative sheet 11 can be shortened, and the negative film 64 can be saved accordingly.

After the developer is spread over the entire image area, the rear ends of both sheets are moved to the developing roller pair 30a. Before passing over the nib 30b, the cam 45 shown in FIG.
6 pushes downwards with the starting point 54 as the center. As the arm 46 rotates downward, the developing roller 30b
At the same time, the developing roller 30b is pushed down, and the developing roller 30b is separated from the developing roller 30a. After this, the rotation of the developing roller pair is stopped. This separation timing is determined by counting the time since the sensor 37 detects the rear end of the position.

As a result, the distance between the negative film l1 and the positive film 14 increases, and the distance between both sheets shown in FIGS. 2 and 3 increases.
Excess developer can be stored between -D'. Both developed sheets are held in close contact with the developer and stopped with their rear ends bitten by developing rollers 30a and 30b separated from each other, and then discharged out of the machine by the operator. (Or,
A leaf spring (not shown) is interposed between the pair of developing rollers 30a and 30b, and this leaf spring is pressed against the nip portion of the pair of developing rollers 30b through both sheets after the two rollers are separated, so that the rotation of the pair of developing rollers 30b and A configuration may also be adopted in which the sheet is discharged out of the machine by the frictional force of the sheet in contact with this roller. ) Each roller of the developing roller pair 30a, 30b is connected to a sensor 47.
is separated when the sensor 42 is detecting the rear end of the body 14 or when the sensor 42 is detecting the film, but
This is done by controlling the rotation of the cam 45,
At this time, the copying operation described below is prohibited.

This prohibition of the copying operation is performed by displaying the copy button inactive, indicating that copying is not possible, etc., or by a combination of these. This can prevent the operator from forgetting to take out the sheet.

Note that although an example has been shown in which the second exposure means is provided at the mounting stage of the exposure section 21, it may be provided at the accommodation stage of the exposure section 21.

〔Effect of the invention〕

As is clear from the above, according to the present invention, the second exposure means exposes the photosensitive band material to light for softening the image before or after exposure by the exposure means for exposing the original image. , the high-density areas are reduced to a low density, making the image softer and making it possible to improve the reproducibility of photographs.

[Brief explanation of drawings]

The drawings are all for explaining an embodiment of the present invention, and FIG. 1 is a schematic diagram showing the internal structure of an instant photographic device according to the embodiment, and FIG. 2 is a perspective view showing a state in which a negative film is developed. FIG. 3 is a perspective view showing the state of the body sheet, carrier sheet, and pod, FIG. 4 is a front view of the developing roller pair, and FIGS. 5 and 6 are enlarged views of main parts near the developing section, respectively. FIG. 7 is a sectional view showing the structure of the second exposure means according to the present invention, and FIG. 8 is a sectional view showing another structure of the second exposure means. 1... Optical unit, 2... Conveyance unit, 11... Negative sheet, 13...
Career seat, 14...Body seat, 15.
...Developer, 17, 37, 42, 53, 107.
...Sensor, 20a...Rotary blade, 20b
...Fixed blade, 26, 27, 52...Roller pair, 30a, 30b...Developing roller,
45...Cam, 46...Arm, 51
...Light source, 54...Bin, 64...
...Negative film, 80.Old...Flexible strip material, 71
... Reflector, 72 ... Shielding object, 73.
·····a reflector. Figure 2 Figure 3 Figure 5 Figure 6 Figure 4 Figure 3 G l6 Figure 7 Figure 8

Claims (1)

[Claims] An exposing means for exposing a roll of photosensitive strip material, a cutting means for cutting the exposed photosensitive strip material one by one into sheet-like photosensitive sheets, and a conveying means for conveying the photosensitive sheet. a latent image forming surface of the photosensitive sheet on which a latent image is formed by the exposing means; The pod is split between the two sheets by passing the image-receiving sheet together with the pair of developing rollers, and the developer in the pod is spread, causing the latent image formed on the latent image forming surface of the photosensitive sheet to develop color. , in an instant photographic apparatus that transfers the coloring agent onto an image receiving sheet to form an image, a second step of exposing the photosensitive strip material to light for softening the image before or after exposure by the exposure means; An instant photographic device characterized in that it is provided with an exposure means.