EP0855048A1 - Method and device for testing a photographic film - Google Patents
Method and device for testing a photographic filmInfo
- Publication number
- EP0855048A1 EP0855048A1 EP96934657A EP96934657A EP0855048A1 EP 0855048 A1 EP0855048 A1 EP 0855048A1 EP 96934657 A EP96934657 A EP 96934657A EP 96934657 A EP96934657 A EP 96934657A EP 0855048 A1 EP0855048 A1 EP 0855048A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- film
- light
- state
- signal
- condition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
- G03D13/00—Processing apparatus or accessories therefor, not covered by groups G11B3/00 - G11B11/00
- G03D13/003—Film feed or extraction in development apparatus
- G03D13/005—Extraction out of a cassette and splicing of the film before feeding in a development apparatus
Definitions
- the invention is based on a method according to the preamble of claim 1 and a device according to the preamble of claim 7.
- the films are removed from the film cartridge in a so-called splicer and stuck together to form a long tape.
- the rear end of a film and the front end of the subsequent film must be positioned in an adhesive station so that the ends can be connected with an adhesive label.
- Devices of this type are described, for example, in DE OS 38 33 468 or EP OS 212 134.
- the films are usually positioned in the gluing station with infrared light barriers.
- US Pat. No. 5,093,686 describes a film system and a laboratory organization in which the film is rewound into the cartridge after development and copying and is thus delivered to the customer with the finished paper images.
- a splicer suitable for these films can now, in the darkroom mode, as before, glue the unexposed films together to form a tape, which is then developed in a developing machine.
- such a splicer can also be used in bright room operation to glue films, from which repeat orders are to be made, into a tape, which, however, is no longer developed but only copied afterwards.
- the object is achieved by a method having the features of claim 1 and claim 6 and an apparatus having the features of claim 7 and claim 10.
- the invention assumes that a developed film, in particular in the infrared wavelength range, in which most Standard light barrier modules work, is practically fully permeable. It is therefore not possible for such an infrared transmitted light sensor to determine whether there is no film or an already developed film between the light source and the photosensor. It is therefore first determined with a second detector whether a film is in the film guide. Only when this is ensured can an infrared light barrier be used to determine whether the film is infrared-transmissive or - blocking. In the former case it is a developed and in the latter case an undeveloped film.
- the presence of the film can be checked, for example, with a mechanical button that is attached so that the front edge of the film flips a shift lever.
- a pneumatic solution would be preferable.
- mount an air pressure sensor on the other side of the film guide so that the reduction in pressure can be measured when a film is pushed between the air nozzle and the pressure sensor.
- a heating resistor could also be used, the electrical resistance of which changes with temperature. If the resistance is no longer blown on because there is a film in the guide, its temperature increases and the resistance changes accordingly.
- the presence of a film is preferably determined using an infrared reflex light barrier.
- This inexpensive standard component is attached so that the light is directed against the reflective back of the film.
- This light barrier With this light barrier, a developed film which is inherently infrared-transparent can also be detected.
- an infrared transmitted light sensor can be used to determine whether the film has already been developed. In this case, the two possible states “permeable” or “impermeable” are sufficient for this determination.
- 1 is a schematic representation of a controller that works with two detector devices
- 3 is a film guide which is provided with an infrared reflex light barrier and with an infrared transmitted light barrier,
- Fig. 5 shows a further flow diagram for a state detection with two sensors
- Fig. 6 is a flowchart for status detection with only one sensor.
- the sensor 1 in FIG. 1 is preferably a photodiode of an infrared reflex light barrier with a threshold switch, which is designed such that a signal is only present at the input 4 if it is certain that there is any Film is in the lead.
- the light barrier assigned to sensor 2 also works in the infrared range, but in contrast to the reflex light barrier, it is designed as a transmitted light barrier.
- the threshold switch of sensor 2 is set so that there is no signal at input 5 if it is certain that an undeveloped film is in the guide.
- the controller 3 has two inputs, of which the input 4 is connected to the sensor 1 and the input 5 to the sensor 2. Furthermore, the control is provided with outputs 6, 7, 8, which can be used for corresponding control purposes. The outputs are controlled via the logic elements 9, 10.
- a film guide with a corresponding sensor system is shown in FIG. 3.
- the film 12 is pushed through a guide system (not shown) through the guide 14 in the direction of arrow A.
- the reflex light barrier 23 consists of the light source 21 and the photo sensor 1, both of which are arranged on the same side of the film guide 14.
- the photosensor 1 consequently receives light only when the light emitted by the light source 21 is reflected by the film 12.
- the transmitted light light barrier 24 has a light source 22 and a photo sensor 2 on opposite sides of the film guide 14.
- the photosensor 2 supplies a signal when either there is no film 12 in the guide 14 and the light emitted by the light source 22 reaches the sensor 2 directly, or when an already developed film is in the guide 14 because it is in the Infrared range is transparent. There is therefore no signal at input 5 if there is an undeveloped film in guide 14.
- the logic element 9 in the controller 3 of FIG. 1 is designed such that when there is no signal at the input 4, a voltage is applied to the output 6. If this state is illustrated in FIG. 3, this means that none Film 12 is present in the guide 14, at least that the front edge 13 of a film 12 is not yet in the region of the reflex light barrier 23.
- the photosensor 2 receives the light emitted by the light source 22, since developed films are practically transparent in the infrared wavelength range. In this case there is a signal at input 5. If the logic element 10 receives a signal via the connection 11 and the input 5, there is also a signal at the output 7, while there is no signal at the outputs 6 and 8. In the event that the film 12 is a film which has not yet been developed and has a blocking effect in the infrared range, the photosensor 2 receives no light, so that no signal is present at the input 5. In this case (signal at connection 11, no signal at input 5) there is a signal at output 8. In this state, there is no signal at outputs 6 and 7.
- the controller 3 can also be viewed as a logic module with two inputs and three outputs. In order to achieve clear results here, it is ideal to position the transmitted light sensor 24 in such a way that it acts on the edge of the film 12, which is located opposite the reflected light sensor 23.
- the switching logic of the controller 3 can be found in the table below.
- An X stands for an applied signal and a circle for no signal.
- only one detector device with a photo sensor 30 is provided, which works in the blue-green wavelength range.
- the sensor 30 delivers a signal proportional to the incident light.
- the controller 33 which in turn has three outputs 36, 37, 38, thus has only a single input 34.
- the controller 33 contains two setpoint generators 35 and 39 and two comparison elements 31, 32
- the value provided corresponds to approximately 90% of the signal present at the input 34 when there is no film in the guide 14.
- the value provided by the setpoint generator 39 corresponds to approximately 10% of this signal.
- both setpoints can be adjusted again and again in accordance with the change in the power of the light source of the detector device.
- the signal present at input 34 is greater than the signal from setpoint generator 35, a signal is present at output 36.
- a signal is also present at the output of the comparator 32, because the signal tapped via the connection 40 is also greater than the signal from the setpoint generator 39.
- the AND gate 42 thus receives a signal from the comparator 32, while there is no signal from the NOT gate 41. This means that there is no signal at output 37 either.
- the output 38 also remains without a signal via the NOT gate 43.
- the signal at input 34 is smaller than the signal from setpoint generator 35, but larger than the signal from Setpoint generator 39. This means that no signal is connected to output 36, whereas a signal is present at the output of comparator 32. Since there is now also a signal from the NOT gate 41 to the AND gate 42, this switches a signal to the output 37. Again, there is no signal at the output 38 via the NOT gate 43.
- the signal at the input 34 is smaller than the signal from the setpoint generator 39. While there is no change at the output of the comparator 31 compared to the previously described case, there is now no output at the comparator 32 Signal on. There is therefore no signal at the output 37, whereas a signal is now present at the output 38 via the NOT gate 43.
- the detector device 23 would have to be eliminated.
- the light source 22 of the detector device 24 would then have to be such that it emits light in the blue-green wavelength range.
- FIGS. 1 and 2 can also be implemented as software. Corresponding drainage schemes are shown in FIGS. 4 to 6. 4, the output signal of the sensor 1 is queried under the reference symbol 51. As long as the sensor does not emit a signal, the program is reset. Only when the query at 51 shows a positive result is the output signal of the sensor 2 also queried under the reference symbol 52. If there is no signal here, there is a developed film in the Leadership 14. This decision is marked 57. However, if a signal is present at sensor 2, the detected film is a film that has not yet been developed. This decision is made at 58.
- the sensor 2 can also be queried first. This query is again provided with the reference symbol 52. If there is no signal at sensor 2, it can be decided immediately below 58 that there is an undeveloped film in guide 14. If, on the other hand, a signal is present, sensor 1 is again queried under reference number 51. If there is no signal here, there is at least no film in the area of this sensor. The program is therefore reset and the query starts again. If, on the other hand, there is a signal at sensor 1, it can now be decided under 57 that this is a developed film.
- reference number 55 is used to check whether the signal at sensor 2 is greater than a threshold value which is approximately 90% of the signal that is present at sensor 2 when there is no film in the guide. If the signal at sensor 2 is greater than this threshold value, this means that there is actually no film in the guide and the program is reset. However, if the signal at sensor 2 is smaller, it will be below the threshold value.
- Reference numeral 59 compared with a second threshold. This threshold is only 10% of the signal that is present at sensor 2 when there is no film in the guide. If the signal is greater than this threshold, a decision is made in 57 that the film is developed. However, if it is smaller, the decision under 58 is for an undeveloped film.
- the method according to the invention and the device according to the invention are not only applicable to the devices mentioned here, but can also be used wherever the incorrect handling of a film - be it developed or undeveloped - would lead to an irretrievable loss for the customer.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19537906A DE19537906C2 (en) | 1995-10-11 | 1995-10-11 | Method and apparatus for checking a photographic film |
DE19537906 | 1995-10-11 | ||
PCT/EP1996/004444 WO1997014078A1 (en) | 1995-10-11 | 1996-10-11 | Method and device for testing a photographic film |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0855048A1 true EP0855048A1 (en) | 1998-07-29 |
EP0855048B1 EP0855048B1 (en) | 2002-01-16 |
Family
ID=7774601
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96934657A Expired - Lifetime EP0855048B1 (en) | 1995-10-11 | 1996-10-11 | Method and device for testing a photographic film |
Country Status (6)
Country | Link |
---|---|
US (1) | US6000861A (en) |
EP (1) | EP0855048B1 (en) |
JP (1) | JPH11513503A (en) |
DE (2) | DE19537906C2 (en) |
ES (1) | ES2171725T3 (en) |
WO (1) | WO1997014078A1 (en) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2125084C3 (en) * | 1971-05-19 | 1975-02-13 | Agfa-Gevaert Ag, 5090 Leverkusen | Device for lifting the beginning of a film roll |
CA1117346A (en) * | 1978-06-19 | 1982-02-02 | Noritsu Koki Co., Ltd. | Automatic film retriever |
IT1214975B (en) * | 1985-08-08 | 1990-01-31 | Signoretto Roberto | WITH METHOD PROCESSING ENVELOPES AND EQUIPMENT FOR PHOTOGRAPHIC LABORATORIES. CORRELATE PHOTOGRAPHIC FILMS |
DE8717530U1 (en) * | 1987-09-30 | 1989-03-09 | Siemens Ag, 1000 Berlin Und 8000 Muenchen, De | |
DE3935915C2 (en) * | 1989-10-27 | 2001-08-02 | Agfa Gevaert Ag | Process and device for processing developed photographic films |
JP2719015B2 (en) * | 1989-12-05 | 1998-02-25 | 富士写真フイルム株式会社 | Photo film handling and printing method and storage container |
JPH07219038A (en) * | 1994-02-04 | 1995-08-18 | Fuji Photo Film Co Ltd | Film viewer |
JPH08152676A (en) * | 1994-11-28 | 1996-06-11 | Canon Inc | Device for discriminating photographic film already developed and camera provided with the device |
-
1995
- 1995-10-11 DE DE19537906A patent/DE19537906C2/en not_active Expired - Fee Related
-
1996
- 1996-10-11 JP JP9514724A patent/JPH11513503A/en active Pending
- 1996-10-11 ES ES96934657T patent/ES2171725T3/en not_active Expired - Lifetime
- 1996-10-11 US US09/051,503 patent/US6000861A/en not_active Expired - Fee Related
- 1996-10-11 WO PCT/EP1996/004444 patent/WO1997014078A1/en active IP Right Grant
- 1996-10-11 DE DE59608604T patent/DE59608604D1/en not_active Expired - Fee Related
- 1996-10-11 EP EP96934657A patent/EP0855048B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9714078A1 * |
Also Published As
Publication number | Publication date |
---|---|
US6000861A (en) | 1999-12-14 |
ES2171725T3 (en) | 2002-09-16 |
DE59608604D1 (en) | 2002-02-21 |
DE19537906C2 (en) | 2002-11-21 |
WO1997014078A1 (en) | 1997-04-17 |
DE19537906A1 (en) | 1997-04-17 |
JPH11513503A (en) | 1999-11-16 |
EP0855048B1 (en) | 2002-01-16 |
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