JPS618367A - Side printer - Google Patents

Abstract

PURPOSE:To obtain a side printer capable of printing clearly and stably, by printing in correspondence with the feeding of a photosensitive material. CONSTITUTION:To contrive matching with a feeding system for a photographic film 11, a printing-controlling part 25 generates driving pulses at a predetermined interval so as to obtain a velocity substantially corresponding to a speed pattern of a driving part 12, and the pulses are sent to a printing drum driving part 23 to rotate a printing drum 22. In addition, the part 25 generates a light-emitting signal with a pulse width corresponding to film sensitivity and the interval of the driving pulses, at timings corresponding to the driving pulses, thereby operating a light-emitting part 26 to emit light. The part 26 comprises 7 light- emitting diodes 50, which intermittently emit light N times during the feeding of the film 11, thereby forming each character of 7XN dots. A lens 51 is disposed between the diode 50 and the drum 22, and a character formed of emitted light is printed at the side of the film 11 in a reduced size.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is for printing characters, symbols, etc. on the sides of a roll of photosensitive material while transporting it in the manufacturing process of photographic film, the printing process of photographic paper, etc. This article relates to an ID printing device used for printing.

During the manufacturing process of light-sensitive materials such as photographic film, the manufacturer's name, product name, frame number, and date of manufacture are recorded.

Characters such as manufacturing lot numbers, symbols, etc. are recorded on the side where they do not interfere with photography. Conventional side printing devices used for this side printing include, for example,
7'-420j No. 7, No. 57-16.3226, No. 5
As described in Japanese Patent No. 8-219543, it is known that a print drum is disposed in the transport path of the photographic film, and a light emitting section is disposed opposite to the print drum.

The print drum supports the photographic film and records a clear image, and is rotated by the frictional force when the photographic film is transported by the transport system.

A rotary encoder is connected to this print drum, and the position of the photographic film is detected from the amount of rotation of the print drum, and characters, etc. are printed at a predetermined position while checking this position. Also, Jitsukō 56-16589
As described in the above issue, it is also known that a driven roller is used to rotate the rotary encoder instead of the print drum, and the light emitting part is placed at a position where it is linearly transported past the driven roller. It is being

In the conventional side printing device described above, the print 1 roller or the driven roller rotates as the film travels, and the rotary encoder follows this and rotates. A considerable amount of torque is required.

Therefore, slippage is likely to occur between the photographic film and the print drum, etc., which may cause the print to be misaligned by a predetermined distance from the apparatus, or may cause excessive tension to be applied to the photographic film, thereby degrading the quality. Furthermore, since the photographic film is often accelerated or decelerated regardless of printing, there have been problems such as the printed image being blurred and the exposure amount and printing position becoming unstable.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a side printing device that prevents misalignment of printing positions.

Another object of the present invention is to provide a side printing device that can perform clear and stable printing by printing in accordance with the travel of the photosensitive material.

[Features of the invention]

In order to achieve the above object, the present invention provides a print control unit that generates drive pulses at intervals according to a desired speed and generates a light emission signal in synchronization with the drive pulses, and is driven by the drive pulses. The photosensitive material is driven at a desired speed by rotating a drum connected to the driving section, and the light-emitting section is made to emit light while the photosensitive material is running to print characters, etc. be. That is, the present invention does not detect the movement of the photosensitive material and print accordingly, but prints while moving the photosensitive material at a desired speed suitable for printing.

〔Example〕

In FIG. 1, a photographic film 11 is wound around the outer periphery of a supply reel 10, and is rewound by a drive unit 12. This rewound photographic film 11 is looped between a pair of pass rollers 13, 14. The size of this loop is detected by position sensors 15, 16 placed at two positions at different heights. These position sensors 15 and 16 are composed of photosensors that use infrared light that does not expose the photographic film 11, and their detection signals are input to the feed control section 17. This delivery control unit 17 increases the speed of the drive unit 12 when the loop becomes smaller and reaches above the position sensor 15.
Also, if the position falls below the position sensor 16, it will decelerate,
The drive 12 is thereby controlled in such a way that the loop is located between the two position sensors 15,16.

The photographic film 11 that has passed through the pass roller 14 is wound around a part of the outer periphery of the print drum 22 by a pair of pass rollers 20 and 21. This print drum 22
is rotated by a print drum drive unit 23 at a desired speed suitable for printing, and transports the photographic film 11 while holding it. The print drum 22 carries the photographic film 11.
Since it is not rotated following the rotation speed, there is almost no slippage at a speed suitable for printing. Therefore, a regular drum may be used, but in cases where the increase and deceleration are frequently repeated, as in this embodiment, fine suction holes are provided on the outer periphery and are connected alternately to the vacuum source 24 and the atmosphere. It is desirable to use a well-known suction drum that suction-holds the photographic film 11 only in the section , and to transport the photographic film 11 while suction-holding it.

The print control unit 25 stores speed patterns determined in consideration of printing, such as a speed increase pattern from the start to a steady state, a steady state speed pattern, a deceleration pattern from the steady state to a stop, etc. Drive pulses are generated at intervals according to this speed pattern and sent to the print drum drive section 23. As the print drum drive unit 23, a motor that performs step rotation based on drive pulses, such as a pulse motor, or a DC servo motor or AC servo motor having a speed control system and a digital position control system is used.

The print control section 25 generates one light emission signal at a timing synchronized with the drive pulse, for example, every N (integer) number of drive pulses, and sends this to the light emission section 26 to control light emission. The pulse width of this light emitting signal is of course set according to the film sensitivity, and in order to always give a constant exposure regardless of the transport speed of the photographic film 11, the pulse width is set according to the speed pattern. ing. The light-emitting section 26 may be of any type as long as it can print characters, figures, marks, etc. as latent images on the photographic film 11 while it is running. For example, a one-dimensional light-emitting section in which light-emitting bodies are arranged in a row in the axial direction of the print drum 22, a two-dimensional light-emitting section in which light-emitting bodies are arranged in a matrix, C
RT, a combination of white light and a transmissive liquid crystal display, a laser recording device, etc. are used. If a large number of light emitting diodes are used, in addition to placing a lens between them and the print drum 22, the emitting end of the optical fiber may be placed close to the print drum 22 to reduce the size of the emitted characters. It may also be printed on the photographic film 11.

The printed photographic film 11 is looped by a pair of pass rollers 28 and 29.

As mentioned above, this loop connects two position sensors 32.
．． The size is detected at 33 and sent to the winding control section 34. This winding control section 34 controls the rotation speed of the drive section 350 so that the size of the loop falls within a certain range. This drive unit 35 rotates a take-up reel 36 to wind the printed photographic film 11 around its outer periphery. In a steady state, the winding speed of the photographic film 11 is 60
m/min, and one roll of photographic film is printed in about 15 minutes. Then, at the start of winding, the drive pulse changes from 5001 (z to 5KH2) in about 5 seconds.
Changes to Note that the reference numeral 37 indicates a pass row.

Next, the operation of the above embodiment will be explained. After the start, the drive unit 12 increases its speed and reaches a predetermined fixed seat speed. Thereafter, the reel 10 is reversed by repeating slight increases and decelerations so that the loop becomes a predetermined size, and the photographic film 11 is rewound.

The diameter of this reel 10 is detected, and when there is no remaining reel, it starts decelerating and stops in about 5 seconds.

Photographic film 11 rewound by reversing the reel 10
is transported while being attracted and held by the print drum 22, and is wound up by a take-up reel 36 that rotates at approximately the same speed pattern as the take-up reel 10.

The print control section 25 generates drive pulses at predetermined intervals at a speed that approximately corresponds to the speed pattern of the drive section 12 in order to match the film transport system with the print drum. Send it to the drive section 23,
The print drum 22 is rotated. At the same time, the print control section 25 generates a light emitting signal having a pulse width corresponding to the film sensitivity and the interval between the driving pulses at a timing corresponding to the driving pulses, and causes the light emitting section 26 to emit light. The characters emitted by the light emitting section 26 are printed as a latent image on the side of the photographic film 11 while it is running.

This embodiment has the advantage of simplifying the apparatus since a loop is formed before and after the print drum 22 so that the print drum 22 is driven independently of the reel 10.36. However, the print control 25 may directly control the drive 12.35 to completely synchronize the transport of the photographic film 11 and printing. Also, a sprocket can be used in place of the print drum 22. In this case, if the tension on the delivery side is made stronger than that on the take-up side to suppress the occurrence of hacklash caused by play between the perforations and the teeth of the sprocket, misalignment of the print position will not occur. .

FIG. 2 shows a specific embodiment of the present invention. The speed setting device 40 is for inputting speed data of the photographic film 11, and this data is inputted to the drive pattern generation circuit 41. This drive pattern generation circuit 41
generates a signal (a) corresponding to the speed increase pattern or deceleration pattern shown in FIG. (b) is emitted. In this reference pulse train signal (b), the pulse interval is proportional to the transport speed of the photographic film 11, and the number of pulses is proportional to the transport amount.

The reference pulse train signal (b) is supplied to the timing control circuit 4.
Sent to 3. As shown in FIG. 3, the timing control circuit 43 generates a readout signal (c) at a timing synchronized with the reference pulse train signal (b).

Outputs a light emission signal (e) and a drive pulse (e), respectively. The generation timing of these signals is as follows: First, the read signal (
c) is generated, and in synchronization with this, the print pattern signal (c) is generated.
D) is read out, and after it becomes stable, a light emission signal (E) is generated, and then a drive pulse (E) is output. This drive pulse (to) is sent to the pigeon driver 44, and the pulse motor 45
is driven to rotate the print drum 22.

The characters to be printed are specified by operating the print content setting device 47. This print content setting device 47 sequentially edits and outputs the pattern to be emitted in units of the readout signal (c) according to the set characters, and has a print pattern memory composed of first-in, first-out storage elements. to circuit 48.

The print pattern storage circuit 48 reads out the print pattern signal (d) in synchronization with the readout signal (c) and sends it to the driver 49. This driver 49 causes the light emitting section 26 to emit light and prints the generated characters on the photographic film 11 that is being transported.

Since the light emitting section 26 emits light when there is no driving pulse, that is, when the pulse motor 45 is at low speed or stopped, the characters recorded on the photographic film 11 do not run out.

FIG. 4 shows an example of the light emitting section. The light emitting section 26 has seven light emitting diodes 50 arranged in a row,
By intermittently emitting light N times while the photographic film 11 is being transported, one character is made up of 7×N dots. A lens 51 is disposed between the light emitting diode 50 and the print drum 22, and the emitted characters are reduced in size and printed on the photographic film 11.

FIG. 5 shows an embodiment in which the print drum and drive drum are separated. A drive drum 53 and a print drum 54 are arranged with an appropriate distance between them. The drive drum 53 is rotated by a pulse motor 45 to transport the photographic film 11 without causing it to slip, and the print drum ensures the flatness of the photographic film 11 so that the characters are not blurred. Note that the light emitting section 26 may be arranged between the drive drum 53 and the print drum 54.

〔Effect of the invention〕

The present invention having the above configuration is provided with a drive section controlled by a print control section to transport the photosensitive material at a desired speed, and simultaneously control a light emitting section that emits characters, etc. in accordance with this transport speed. 11. If a free print drum is rotated following the photosensitive material as in the past, and a rotary encoder directly connected to the print drum detects the position of the photographic film and controls the light emission of the light emitting section, the print drum Slip occurs between the photosensitive material and the photosensitive material, resulting in misalignment of the printing position, but such a problem does not occur in the present invention. Furthermore, since the photosensitive material is not accelerated or decelerated independently of printing, the exposure amount and exposure position will not become unstable, and because no excessive force is applied to the photosensitive material, there will be no damage to the photosensitive material. I don't have to worry about it.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an outline of the present invention. FIG. 2 is a block diagram showing one embodiment of the present invention. FIG. 3 is a timing chart of the circuit shown in FIG. FIG. 4 is a side view showing an example of the light emitting section. FIG. 5 is an explanatory diagram showing the main parts of another embodiment of the present invention. 11...Photographic film 12...Print drum 50...Light emitting diode 53...Drive drum 54...Print drum.

Claims (5)

[Claims] (1) A side printing device for imprinting characters, etc. as a latent image while transporting a roll of photosensitive material, which comprises: a drum for transporting the photosensitive material; a drive section for rotating the drum by rotating with a drive pulse; , a light emitting section which is disposed opposite to the photosensitive material being transferred by the drum and records characters etc. on the photosensitive material by emitting light in response to a light emitting signal; A side print device comprising a print control section that outputs a light emission signal at synchronized timing. (2) The side print device according to claim 1, wherein the light emitting section is arranged to face the drum. (3) The side print device according to claim 2, wherein the drive section is a pulse motor. (4) The side print device according to claim 3, wherein the light emitting section has light emitting diodes arranged in a line in the direction of transfer of the photosensitive material. (5) The side printing apparatus according to any one of claims 1 to 4, wherein the drum is a suction drum that attracts and holds the photosensitive material in contact with the outer periphery of the drum.