JPH0820672B2 - Micro film printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention runs a roll microfilm (long information recording medium), and image information (images) sequentially recorded along the length of the film. The present invention relates to a microfilm printer which locates an image information portion of a desired address in a frame on a lighting unit by automatic retrieval means and prints out the image information as an enlarged image copy.

(Prior Art) Normally, this type of device is not a printer single-function device, but a reader function capable of projecting image information searched for in the illumination unit as an enlarged still image on the screen surface and reading the image information. It is configured as a reader printer combined with.

In the automatic search of the image information portion of the desired address, a film having a search mark on the side of each image frame is used as a film, the mark is optically detected, and the desired mark in the film is counted by counting this. I try to automatically search for frames.

More specifically, a mark on the film is illuminated by a lamp, a change in light interrupted by the mark when the film is transferred is detected by a mark detector, the output signal of the mark detector is counted by a counter, and The count content of this counter and the frame number (address) of the desired image frame input from the keyboard, etc. are compared by a comparison circuit, and when both match, a stop signal is issued from the comparison circuit to the drive control circuit, and the film is The driving system to be transferred is stopped and the desired frame is stopped on the illumination unit.

As a mode of adding a search mark for assigning each image frame of the film, so-called 3-level blip mode is used as a batch mark (large mark for large classification), a file mark (medium mark for middle classification), and a page mark (small mark). (Mark) that uses three types of marks, so-called 2-level blip mode with file marks and page marks with two types of marks assigned, and so-called 1-level blip mode with page marks only Things.

(Problems to be Solved by the Invention) (1) However, in such a conventional example, since the transport of the film is controlled only by the output signal of the mark detector, a mark interval other than a predetermined mark interval or a mark For microfilms with uneven intervals, unnecessary film transport time such as overrun and return time is required after detecting the mark of the desired image frame, resulting in a long image frame positioning time. There was a point.

(2) Further, the conventional apparatus has a structure in which the mark detector 17 is arranged at a position corresponding to the film illumination (projection) section A as shown in FIG. Reference numeral 14 is a film illumination (exposure) lamp of the film illumination unit, and 16 is a magnifying projection lens. F is a roll microfilm, 1A is a film rewind reel, and 8 is a film take-up reel.

Therefore, for example, when a so-called file print is executed, that is, when a print mode in which images of all image frames of all pages belonging to one designated file are sequentially and automatically printed out, each image frame in the designated file is executed. Images are printed out sequentially from the first frame, and even after the final image frame is located in the illumination section and the image of the final image frame is printed out, the device continues to execute the film feed operation. By letting the mark detector detect the file mark of the first image frame of the next file, it is determined that the previous image frame is the last image frame of the target file. It can be regarded as a wasteful operation unrelated to printing, which adversely affects the total time for print access.

Specifically, for example, with respect to the film F in the 2-level blip mode as shown in FIG. 15, the images of the image frames m1 to m5 for all pages belonging to the first file F1 are sequentially and automatically printed out. The case where the file print mode is executed will be described.

When the film F is run and the file mark MF ₁ given to the first image frame m 1 of the first file F ₁ is detected by the mark detector 17, the image frame m 1 is located in the illumination unit A. The film F is detected, the traveling of the film F is stopped, and the printing of the image frame m1 is executed.

After that, the film frame-by-frame feed operation is sequentially executed, and the image frames m2, m3 ... Are sequentially printed.

Then, the final image frame that eventually belongs to the first file F1
Even after m5 is located in the illumination unit A and printing of that image frame is executed, at this stage, the apparatus determines that the image frame m5 is the final image frame belonging to the designated first file F1. It is not possible.

Then, the apparatus is made to carry out the film feeding operation subsequently, and the mark detector 17 is made to detect the file mark MF ₂ attached to the first image frame m 1 of the next second file F ₂ , so that for the first time at this point Previous image frame m5
Then, it is judged that the printing of all the image frames m1 to m5 belonging to the target first file F1 is completed.

Also, as shown in Japanese Patent Publication No. 60-23338, a device is known in which printing is started from the last image frame in a target file and the film is sequentially transferred to the first image frame while printing. However, like the above,
Since the mark detector is provided at the position of the illumination unit of the projection optical path, before the final image frame m5 of the target first file F1 is stopped in the projection optical path, the mark image detector of the next first image frame m1 of the second file F2 is recorded. By detecting the file mark mF2,
The first image frame m1 of the second file F2 is positioned in the projection optical path, and then the page mark MP of the final image frame m5 of the first file F1 is detected to position the frame m5 in the projection optical path to start printing. I think there is. Therefore, similarly to the above, there is a problem that an unnecessary film feeding operation unrelated to printing is required.

In either device, the mark detector is provided at the position of the projection optical path from the image exposure light source to the screen.Therefore, when changing the projection magnification by changing the projection lens, the light intensity of the illumination light source is changed to change the illuminance on the film. Is changing. Therefore, the amount of light to the mark detector fluctuates and the mark cannot be detected accurately.

The present invention has been made in view of the above conventional problems,
By shifting the position of the mark detector from the position of the projection optical path and sequentially storing the sizes of the marks passing through the mark detector, it is possible to efficiently print the image frames of the target file of the microfilm. .

(Means for Solving Problems) The present invention is directed to a large number of image frames and a first image frame of each file among a group of consecutive image frames in which information of one file related to information content is recorded. Conveying microfilm through the illumination unit with a file mark attached to the side and a page mark attached to the side of other image frames except for the first image frame of each file, which has a different length from the file mark In the microfilm printer configured to print the image frame placed on the illumination unit, a film transport unit that transports the microfilm across the illumination unit, and a predetermined position deviated from the illumination unit in the film transport direction. And a mark detecting means for detecting the length of each mark on the film passing through the predetermined position, and an image frame placed on the illumination unit. Copying means for copying and the order in which the length of each mark detected by the mark detecting means is detected while the last image frame from the first image frame in the target file is being conveyed from the predetermined position to the illumination unit. And storing that the final image frame in the target file is placed on the illumination unit based on the length data of the plurality of marks stored in the storage unit. The micro film printer is characterized in that the start or end of printing of the image frame group in the target file is determined without moving the first image frame of the file to the illumination section.

(Function) When the position information of the target file to be searched / printed out of the image frame group of each file recorded on the microfilm is input, the film is conveyed, and the mark detection unit detects the mark of each mark during the conveyance. The size is detected.

The sizes of the marks detected by the mark detection means are sequentially stored in the storage means.

Although the position of the mark detection means and the position of the image frame illumination projection unit are deviated, when the final image frame of the target file is positioned in the illumination projection unit, the size of each mark passing through the mark detection unit is stored in the storage unit. Since the data is sequentially stored, it is detected from this stored data that the last image frame has been placed at the illumination position, and file printing is started or finished without moving the first image frame of the next file to the illumination projection unit. can do.

That is, when the final image frame of the target file is positioned on the illumination projection unit, the start or end of the file print can be detected by the data stored in advance in the storage means. In this case, it is possible to eliminate the process of moving the first image frame of the next file to the illumination projection unit.

In this way, in the mode for printing each image frame of the target file, the start or end of file printing is judged based on the stored data without depending only on the detection of the file mark and page mark. It is possible to determine the start and end of printing in a short time, and thus it is possible to complete the copying operation of many target files in a short time.

(Embodiment) Hereinafter, a reader printer of the illustrated example as an embodiment of the present invention will be described.

FIG. 1 is a perspective view of a film drive / search mechanism section, FIG. 2 is a perspective view of a reader optical system and a printer optical system, and FIG. 3 is a schematic diagram of the printer mechanism.

A. Film drive / search mechanism In FIG. 1, 1 is a film supply cartridge for storing a long microfilm F as an information recording medium in a roll shape, and 2 is a cap for sending out the microfilm F in the cartridge 1. Stan roller, M1 is a motor for driving the capstan roller 2, M2 is a film rewinding motor for rotating the film spool in the cartridge, and SOL1 is for contacting the capstan roller 2 with the microfilm F via the support arm 3. Solenoid 4 is a spring for moving the support arm 3, plunger 3a, and capstan roller 2 to separate the capstan roller 2 from the microfilm F. SOL2 is a brake solenoid for the film rewinding motor M2. When not operating, the motor M2 is rotatable and the brake solenoid SOL When 2 is activated (turned on), the brake plate 5 fixed to the motor shaft is sucked to prevent the motor from rotating.

6, 7 are film guide rollers, 8 is a take-up reel, M3
Is a film winding motor for rotating the take-up reel 8, SOL3 is a brake solenoid for the motor M3,
Reference numeral 9 is a braking plate.

Further, although not shown, a guide plate for guiding the film is provided along the film feeding path between the cartridge 1 and the take-up reel 8.

14 is a lamp for illuminating the microfilm F, 15 is a condenser lens, 16 (Fig. 2) is a projection lens for enlarging and projecting the image of the film F illuminated by the lamp 17a on the screen 35 (Fig. 2), and 17 is The mark / space detector (mark sensor) serves as a detector that detects the length of the counting mark m and the space between the marks provided on the side of each frame of the microfilm F. 17a is a light source for the detector.

The mark / space detector 17 has a photoelectric conversion element, and when the film F is transferred, the light beam from the lamp 17a is interrupted by the mark m to generate a mark detection signal, which is detected by the retrieval device. It is counted with a container. Since the details of the search device are publicly known, description thereof will be omitted.

When the frame number A (address) of a desired image frame is input to the input device of the search device, the motor M1 is driven and the solenoid SOL1 is operated.

As a result, the capstan roller 2 becomes the cartridge 1
The microfilm F is pulled out from the cartridge 1 by coming into contact with the microfilm F coming out of the cartridge 1, and the leading end of the microfilm F is fed toward the take-up reel 8.

When the leading edge of the microfilm approaches the take-up reel 8, the take-up motor M3 is driven, and when the leading edge of the microfilm winds around the take-up reel 8, the motor M1 and the solenoid.
Although SOL1 becomes inoperative, the microfilm F is continuously fed by the rotation of the take-up reel 8.

Mark / space detector during microfilm feeding
The number B of the marks m detected in 17 is compared with the numerical value A of the frame number input in advance, and if they match, a stop signal is generated and the brake solenoid SOL3 operates to brake the take-up shaft.
Also brakes the shaft of the motor M2 to stop the elliptic force rotation of the feed spool, which stops the film feeding when the film frame image part corresponding to the frame number A specified in advance is located in the illuminating section. Then, the image of the frame of the desired number A is enlarged and projected on the reading screen 35 through the optical system (FIG. 2) described in the next section B.

FIG. 4 is a block diagram of a control system of the film driving / searching mechanism shown in FIG. Reference numeral 20 denotes a microprocessor, which controls the film transport, and a counting unit 21 that counts the marks m detected by the mark / space detector 17 and measures the lengths of the marks and the spaces between the marks. From the control unit 22, the memory 24 as a storage unit that stores the measured mark m and the length of the space, and the calculation unit 23 that calculates the film transport amount to the target image frame based on the stored length. It is configured.

An input device 25 is used to input the address of a desired image frame using a key or the like.

A motor drive control circuit 26 conveys and stops the film F based on a control signal from the control unit 22.

 27 is a display for displaying the address of the image frame.

FIG. 5 is an explanatory diagram for measuring the lengths of marks and spaces on the microfilm F by the mark / space detector 17.

In the mechanism shown in FIG. 1, a conveyance amount detector 28 as a measuring means for measuring the conveyance amount of the microfilm F is attached to the shaft of the guide roller 7, and a pulse is generated every time the microfilm F is conveyed for a certain length. It is made up of encoders that let you.

In FIG. 5, m1, m2 ... Are marks provided on the microfilm F, and the lengths of the marks are l _m1 , l _m2 ... And the space lengths are l _s1 , l _s2 . The added lengths are l ₁ , l ₂ ...

This length l ₁ , l ₂ ... Corresponds to the distance between marks.

FIG. 6 is a flowchart showing the operation of measuring the mark length and space length and storing the measured value.

When the microprocessor 20 receives the signal detected by the mark detector 17 in the step, it determines whether it is the mark m or the space s in the step, and if the mark / space detector 17 detects the mark m, the step The length l _m of the mark _m is measured by counting the pulses generated from the carry amount detector 28 during the detection of the mark m.
The process proceeds to step, and it is determined whether it is a file mark or a frame mark according to the length, the address of the determined mark is counted, and the length of the mark m measured in step is stored in the memory 24.

In step, if the mark / space detector 17 is detecting the space s, the space length l _s is measured by counting the pulses sent from the carry amount detector 28 during the detection of the space s in step. , The length of the space s measured in the step is stored in the memory 24.

Next, when performing the search operation, first, the sum of the stored mark length l _m and the space length l _s is taken as the distance between marks, that is, the distance 1 per frame, and this distance l is calculated by the calculation unit 23. And the number of frames to the target address are multiplied to calculate the amount of film transport to the target position.

Therefore, if the microfilm F is conveyed based on the calculation result and the stored data, it is possible to position and stop the desired image at a predetermined film illumination position A while performing appropriate speed control.

That is, as a result of the calculation, if the position of the target image frame is far away from the mark detection position of the mark / space detector 17, the transport speed of the film is increased. When the mark on the image frame is detected by the mark detector 17, the film is conveyed at a low speed in a predetermined direction to move the mark to the illumination position A.

Based on the distance L between the mark detection position and the illumination position A and the film transport amount, the target image frame is positioned at the predetermined illumination position A and the film is stopped.

Thus, when performing a search, it is possible to calculate the approximate distance to the mark position at the desired address even if various types of film with different mark intervals are used, and by adjusting the speed of the film according to this calculated distance. The desired mark can be reached in the shortest time, and as a result, the search time can be greatly shortened.

In this example, the length of the mark m and the length of the space s do not always store the absolute value thereof, but only the difference between the length of the mark m or the space s that came last time or the first time is stored. Good.

Further, it is possible to reduce the capacity of the memory 24 by setting the length of the reference mark m or space s and storing only the difference between them.

 FIG. 7 is another control flowchart example.

First, when the current address is n in step, the mark length l _mn and the space length l _sn of that address are added in step, and the address n is advanced in step.

By repeating the steps until the current address n matches the target address (step), the integrated value of the distance to reach the target address is accurately obtained based on the actual measurement (the same).

 FIG. 8 is another control flowchart.

First, after assuming that the current address n is 0 in step, the mark length and the space length for a frame are added in steps to, and the distance x summed in step is divided by a.
The length l for one frame is averaged.

Next, in step, the number of frames z to the target address is calculated, and in step 1, the length l for one frame is multiplied by the number of frames z to obtain the distance y to the target address.

According to this control flow, when the mark length and space length to the target address cannot be measured, the distance from the average of the latest measured values to the target address can be calculated.

In the above example, the case where the image frame of the microfilm F is a simplex is shown, but it is also applicable to the image frame of duplex or duo mode.

B. Reader optical system The target frame image searched and positioned by the film frame illumination unit A by the film driving / searching mechanism shown in FIG. 1 is the magnifying projection lens 16 → fixed first mirror as shown in FIG. 31
→ The second mirror 32 → The third mirror 33 → The fourth mirror 34,
It is projected as a still enlarged image on the reading screen 35 by the optical system.

C. Printer optical system and printer mechanism In FIG. 2, 41 and 42 are first and second printers.
Both of the mirrors 41 and 42 are supported by a common support body 43 with their reflection surfaces facing downward and the extended surfaces of the reflection surfaces intersecting each other at an angle of 90 °, facing each other left and right. I am allowed.

Then, the first and second scan mirrors 41 and 42 are integrally driven leftward between the fixed second mirror 32 and the third mirror 33 of the reader system by a reciprocating mechanism (not shown). ,
Backward drive b is performed to the right.

Normally, the first scan mirror 41 stands by at the home position at the position indicated by the solid line, which is retracted rightward from the optical paths of the second and third mirrors 32 and 33 of the reader system.

When the target frame image is searched by the film frame illumination unit by the film drive / search mechanism of FIG. 1 and the frame image is projected as a still enlarged image on the screen 35, when a copy button (not shown) is pressed. The photosensitive drum 50 of the printer mechanism, which will be described later, is rotationally driven in the direction of the arrow at a predetermined peripheral speed.

In addition, the first and second scan mirrors 41 and
42 is integrally driven forward from the home position shown by the solid line in FIG. 2 to the left at a speed half the peripheral speed of the photosensitive drum 50.

As a result, the first scan mirror 41 moves from right to left in the optical path between the fixed second mirror 32 and the third mirror 33 of the reader system, and the film frame image light from the mirror 32 to the mirror 33 is moved. Are sequentially scanned by the first scan mirror 41, and the scan image light enters the second scan mirror 42 from the first scan mirror 41 and is reflected downward by the mirror surface,
The reflected light is image-formed (slit exposure) at the exposure position on the surface of the rotary photosensitive drum 50 through the slit of the slit plate 51.

The printer mechanism of this embodiment shown in FIG. 3 is a transfer type electrophotographic copying mechanism. In the figure, the photosensitive drum 50 which is rotationally driven in the direction of the arrow is positively or negatively uniformly charged by the primary charger 52, and the scanning image light L by the above-mentioned scan mirrors 41 and 42 is slit on the charged surface. Imagewise exposure is performed through the slits of the plate 51, so that enlarged electrostatic latent images corresponding to the desired film frame images are sequentially formed on the surface of the drum 50.

The latent image is formed by the positive toner developing device 53 selected and designated in advance.
Alternatively, the negative toner developing device 54 performs regular development processing or reverse development processing.

The developed image is stacked and set on the paper feeding mechanism unit 59, and is separated by the paper feeding roller 60 into one sheet, and is passed through the path of the guide plate 61, the registration roller 62, and the guide plate 63 to the photosensitive drum 50 and the transfer charger 55. In the meantime, the images are sequentially transferred onto the surface of the copy material P fed in synchronism with the rotation of the drum 50.

The copying material that has received the image transfer is then separated from the surface of the drum 50 by a separating charger 56 and is fixed by an image fixing device 65 by a conveyor belt 64.
The image is fixed by being introduced into.

When the one-sided print mode is selected and designated, the copy material exiting the image fixing device 65 is guided to the upper surface side of the flapper 66, which is switched to the first switching posture, and is ejected by the ejection roller 67 to the ejection tray 68. Discharged to the top.

The surface of the photosensitive drum 50 after the image transfer is subjected to removal of the untransferred developer by the cleaning device 57, and then subjected to charge removal by the charge removal lamp 58 to be repeatedly used for image formation.

Further, when the double-sided print mode is selected and designated, the copy material, which has been printed on one side and has exited the image fixing device 65, is guided downward by the flapper 66 which is switched to the second switching posture, and the re-feed sheet path is set. It is introduced into the inside of 69, is conveyed again to the registration roller 62 through this sheet path, and is re-fed between the drum 50 and the transfer charger 55 from the guide plate 63 in synchronization with the rotation of the photosensitive drum 50. To be done.

This re-fed copy material is returned to the registration roller 62 through the sheet path 69, so that the front and back sides are reversed and the first side, which has already undergone image formation, faces downward and the second side on the opposite side.
The surface is facing the drum 50 surface, and the next developed image formed on the drum 50 surface is transferred to the second surface thereof.

The copying material that has received the image transfer to the second surface is thereafter transferred to the drum 50 by the separating charger 56 as in the single-sided print mode.
The belt is separated from the surface and is conveyed to the sheet discharge tray 68 as a double-sided print processed product through the path of the conveyor belt 64, the image fixing device 65, the upper side of the flapper 66 that has been switched to the first switching posture, and the sheet discharge roller 67. .

D. File print mode When the file print mode for the target file in the film F is input to the input device 25 (Fig. 4), the traveling of the film F is started.

It is assumed that the film F is conveyed to the mark detection position and the illumination position in order from the leading image of the file.

Specifically, for the film F in the 2-level blip mode as shown in FIG. 10, the images of the image frames m1 to m5 for all pages belonging to the image frame group of the first file F1 are sequentially illuminated from the mark detection position. The case of sending to position A and automatically printing out will be described.

In the apparatus of this example, as shown in FIGS. 1 and 9, the mark / space detector 17 and the light source 17a for detecting the mark / space detector 17 are arranged at a predetermined distance L upstream of the film illuminating section A in the forward running direction of the film. It is arranged at a position displaced.

As the film F runs, the file mark MF (medium mark) and page mark MP (small mark) corresponding to each image frame of the film sequentially pass through the position of the mark / space detector 17. The length thereof is detected by moving, and the lengths of the detected marks and spaces are sequentially stored in the memory 24 (FIG. 4).

FIG. 11 shows a flow chart of mark detection while the film is running. The processing of this flow chart is always performed while the film is running.

FIG. 12 shows the contents stored in the memory 24.
The lengths of marks detected by the mark / space detector 17 are sequentially stored in the. The length of the space between the marks is also sequentially stored in the memory 24, but it is omitted in the drawing.

In FIG. 12, the illumination position pointer A1 indicates the position of the mark data in the memory corresponding to the mark of the image frame currently placed at the illumination position A, and the mark sensor pointer B indicates the mark detection position and the illumination position A. The position of the mark data in the memory corresponding to the mark closest to the mark detection position among the marks existing therebetween is shown.

The positions of the pointers A1 and B should be changed one by one as the film F is conveyed in order to detect the position of the image frame currently placed immediately after the illumination position A and the mark detection position. Has become.

Therefore, by checking the position of the pointer in the memory 24, it is possible to identify the number of the image frame currently placed at the illumination position A in the file.

FIG. 13 shows a flow chart of the file print operation.

Next, the flowcharts of FIGS. 11 and 13 will be described.

First, in the flowchart of FIG. 11, the mark reaches the mark / space detector 17 by the transport of the film F (step 101), and when it passes, the size (length) of the mark is measured (step 102). When the value is determined to be a large mark (step 103), the value of this large mark is stored in the memory 24 (step 104).

Similarly, if the medium mark is determined, the value of the medium mark is stored in the memory (steps 107 and 108).

If it is determined to be a small mark, the value of the small mark is stored in the memory (steps 107 and 109).

When the measured value of any mark is stored in the memory 24, the mark sensor pointer of the memory is advanced by one (step 105), and the mark sensor pointer is set to the next storage area in the memory storing the value of the previous mark. Moving.

The film is further transported (step 106), and the mark
When the space detector 17 detects the next mark (step
101), the measured value of the next mark is stored in the storage area designated by the mark sensor pointer in the memory.

By repeating each step during the transport of the film F, the measured values of the marks sequentially detected by the mark / space detector are sequentially stored in the memory 24.

Thus, after the detector 17 detects the mark MF1 in the first image frame m1 of the target first file F1, the film traveling speed, the film illumination position A, and the mark / space detector 17 are detected from that point. The film running is stopped when a predetermined time calculated from the separation distance L has elapsed or when the film has been conveyed by the length of the distance L from that time (step 110).

As a result, the head image frame m1 of the target first file F1 is located at the illumination position A.

Then, the printing of the image frame m1 is executed.

After that, the one-frame feeding operation of the film F is sequentially executed, and the printing of the image frames m2, m3 ... Is sequentially executed.

That is, in the flowchart of FIG. 13, step 12
When the first image frame m1 of the target file is placed at the illumination position A in step 1, the film is stopped and this image frame m1 is printed (step 122).

Next, the illumination position pointer A1 in the memory 24 is advanced by one (step 123), and the illumination position pointer A1 is moved to the next mark data storage area.

Then, in step 124, it is determined whether or not the next mark data in the memory designated by the illumination pointer A1, that is, the size of the next stored mark is a small mark.

Since the next mark data in the memory designated by the illumination pointer A1 is a small mark (mark length data corresponding to the small mark MP of the image frame m2), the microprocessor 20 judges that the printing is to be continued, and the control unit The film is moved by 22 and the next image frame m2 is placed at the illumination position A and the film is stopped (step 125).

After printing this image frame m2, steps 122-125
By repeating the above, image frames m3 to m5 are printed.

The printing of the image frame m5 is completed, the illumination position pointer A1 is advanced to the next mark data storage area in the memory in step 123, and the process proceeds to step 124.

Since the next mark data pointed by the pointer A1 is not the small mark but the medium mark (corresponding to the medium mark MF2 of the first image frame of the next second file F2), the microprocessor 20 moves to the illumination position A. It is determined that the image frame m5 currently placed is the last image frame of the first file, and thus the illumination position pointer A1 is moved to the previous mark data storage area, that is, the mark data of the image frame m5 without moving the film. Return to the stored area (step 12
6) and finish file printing (same as 127).

Therefore, the completion of the print operation of one file is detected without further moving the film when the printing of the final image frame of the target file is completed, and the next search operation and print operation can be immediately executed.

In the above embodiment, in the file print mode,
Printing starts from the first image frame of the target file, but if printing starts from the last image frame of the target file, the first image frame of the next file should be positioned and moved to the illumination position A as described above. Instead, when the last image frame of the target file is placed on the illumination unit, the start of printing can be detected by the mark data in the memory.

(Effect of the Invention) As described above, according to the present invention, the last image frame of the target file is stored by the data stored in the storage unit without moving the first image frame of the file next to the target file to the illumination position. Is placed in the lighting position,
File printing can be started or stopped,
It is possible to print a large number of files in a short time.

[Brief description of drawings]

FIG. 1 is a perspective view of a film drive / search mechanism section. FIG. 2 is a perspective view of the reader optical system and the printer optical system. FIG. 3 is a schematic diagram of a printer mechanism. FIG. 4 is a block diagram of the control system. FIG. 5 is an explanatory diagram of measurement of mark length and space length. FIG. 6 is a flowchart of the reading / recording operation of the mark length / space length. FIG. 7 is another control flowchart. FIG. 8 is yet another control flowchart. FIG. 9 is a schematic diagram showing the relationship between the mark / space detector position and the film illumination position. Figure 10 shows an example of a film in 2-level blip mode. FIG. 11 is an operation flowchart of the mark / space detector during film movement. Figure 12 shows an example of memory contents. FIG. 13 is a flowchart during file printing. FIG. 14 is a schematic view of the relationship between the position of the mark detector and the position of the film illuminating unit of the conventional device. Figure 15 shows an example of a film in 2-level blip mode. F is film, 15 is film illumination lamp, 17 is mark
Space detector, 28 encoder.

Claims (1)

[Claims] 1. A large number of image frames and a file mark attached to the side of the first image frame of each file in a continuous image frame group in which information of one file related to information content is recorded. , A micro film having different lengths from the file marks and page marks attached to the side edges of the other image frames excluding the first image frame of each file was conveyed through the illumination unit and placed on the illumination unit. In a microfilm printer adapted to print image frames, a film transport means for transporting a microfilm across the illumination part, and a predetermined position deviated in the film transport direction from the illumination part and passing the predetermined position. Mark detecting means for detecting the length of each mark on the film, a copying means for printing the image frame placed on the illuminating section, and a target label. A storage unit that sequentially stores the lengths of the marks detected by the mark detection unit during the transportation of the first image frame to the last image frame in the file from the predetermined position to the illumination unit. Comprising, based on the length data of the plurality of marks stored in the storage means, it is detected that the final image frame in the target file is placed in the illumination unit, the first image frame of the next file is detected. A microfilm printer characterized in that the start or end of printing of image frames in a target file is determined without moving to the illumination unit.