JPS63253345A - Photographic paper printing and developing method - Google Patents

Abstract

PURPOSE:To reduce the useless usage of a photographic paper by constituting an entire printing part including its cutter, so that, at a state the photographic paper is transmitted to a development part, length between the printing part and a cutter part downstream a loop part can be always printed. CONSTITUTION:As the printing part 22 proceeds its printing, a flap 54 is rotated perpendicular to downward, and the fed photographic paper 20 forms the loop part 68. When the length of the part 68 becomes appropriate, a maker 47 gives a cut mark to the middle part of the photographic paper 20. After the printing operation proceeds as much as a photographic paper moving locus length L between the printing part 22 and the cutter 64, the photographic paper 20 is continuously developed from its tip to end. While the printing and development proceed, a cut mark detection sensor 53 detects the cut mark that the marker 47 has given, then the cutter 64 cuts the middle part of the photographic paper 20. However, picture frames are printed on the photographic paper 20 between the cut tip end and the printing part 22. Thus the photographic paper is completely used from its tip to end.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a photographic paper printing and developing method for printing a negative film image onto photographic paper and developing it to obtain a photographic print.

[Background technology] When obtaining a photographic print by printing an image on a negative film onto photographic paper, a large number of images are sequentially printed onto a long sheet of photographic paper, which is then cut into individual images after development. There is.

In this case, the printing operation in the printing section is intermittent, and the printing interval varies greatly depending on the type, density, and density correction value of the printed image. Furthermore, if the number of printing requests is unstable, there may be a long interruption time. On the other hand, in the developing section after positioning, the development speed is continuous and constant.

Therefore, when performing continuous printing operations, the printing paper feed distance per hour is longer in the printing section than in the developing section, and to absorb this difference, a loop-shaped reservoir is installed between the developing section and the printing section. A section will be established. However, if the printing process is interrupted for a long time, all of the photographic paper stored in a loop in the reservoir section will be developed, so it is necessary to cut the middle part of the photographic paper and send the already printed image to the developing section. There is. However, because there is a gap between the cutter and the printing section, the image is not printed on the paper between the tip of the photographic paper cut by the cutter and the printing section, and the paper is turned upside down. It is not possible to print an image on this area unless special measures are taken, resulting in a lot of wasted photographic paper. This wasted portion becomes longer as the printing operation is interrupted.

The present invention has been made in consideration of the above facts, and an object of the present invention is to provide a photographic paper printing and developing method that can reduce the waste of photographic paper.

[Summary and operation of the invention] The present invention prints an image from the leading edge of the photographic paper, stops this leading edge upstream of the developing section, and further prints the image onto the photographic paper to form a loop portion in the middle of the photographic paper. At the same time, a cut mark is added to the photographic paper, and after the image is printed for a length corresponding to the length between the printing section and the cutter section downstream of the loop section, the leading end is sent to the developing section and developed in sequence. When the cut mark reaches the cutter section, the intermediate portion of the photographic paper is cut.

For this reason, in the present invention, when the photographic paper is sent to the developing section, the length between the printing section and the cutter section downstream of the loop section is always printed, and the length between the printing section and the cutter section downstream of the loop section is always printed. Even if the photographic paper is cut, an image has already been printed between the cut end and the printing section, so there is no waste of photographic paper, and the photographic paper can be used efficiently.

[Embodiments of the Invention] FIG. 1 shows a photographic printing and developing apparatus to which the present invention is applied. This photographic printing and developing device 10 has a configuration in which a printing device 12 and a photographic paper developing device 14 are integrally connected. After the paper 20 has been subjected to the printing operation in the printing section 22, it is stored in the reservoir section 24.
The photographic paper is then sent to the leading edge fi14.

The photographic paper developing device 14 includes a developing bath 26 and a bleaching/fixing bath 28.
, a water washing bath 30 is provided, and the photographic paper 20 after development is dried in a drying section 32 and then cut into individual images by a cutter 34 and sent to a take-out section 36.

A light source 40 is provided at the bottom of the printing section 22, and an optical means 44 transmits images of the negative film stored in the negative carrier 42.
It is possible to print onto the emulsion side of the photographic paper 20 through the .

As shown in FIG. 2, in the printing section 22, the photographic paper 20 pulled out vertically downward from the magazine 16 is moved to
The sheet is bent at a right angle and sent to the printing section 22, and after printing, it is held between a conveyor belt 48 and a conveyor roller 50, receives a driving force, and is sent to the reservoir section 24. A cutter 52 is provided between the conveyance roller 50 and the reservoir section 24, and is operated as necessary (in this case, only at the end of the day's work).

A flap 54 is provided in the reservoir section 24.

The leading end of the photographic paper 20 is rotated approximately vertically downward from the state in which it is sent out to the conveyance rollers 56 and 58.

Conveyance rollers 60 and 62 are arranged downstream of the conveyance rollers 56 and 58 to nip and convey the photographic paper 20.

A cutter 64 is provided immediately after this. The rotation and stopping of the conveyance rollers 60 and 62 is controlled by the driving force of a motor (not shown). Further, a slight slack portion 66 is always provided in the photographic paper 20 during conveyance between these conveyance rollers 60, 62 and the photographic paper developing device 14.

A marker 57 is arranged between the printing section 22 and the conveying roller 50, so that dots and cut marks such as punch holes can be added between the printed image frames on the photographic paper.
This cut mark is detected by a cut mark detection sensor 53 provided on the cutter 64, and the cut mark corresponding portion is cut by the cutter 64.

Next, the operation of this embodiment will be explained.

The leading end of the rolled photographic paper 18 stored in the magazine 16 is manually pulled out from the magazine 16, passed through the printing section 22, and transferred to the conveyor belt 48. It is held between conveyance rollers 50.

During printing, the conveyor belt 48 and the conveyor roller 50 are driven in conjunction with the image frame printing, and the leading end of the photographic paper 20 is held between the conveyor rollers 60 and 62. The flap 54 is in the same condition as shown in FIG. 2 and feeds the photographic paper 20 to the conveying rollers 56, 5B without bending it. If there is an irregular portion at the leading end of the photographic paper 20, the cutter 52 cuts it off. The conveying rollers 60 and 62 are stopped and keep the leading edge of the photographic paper 20 in the grip until a predetermined amount of printing has been completed.

Here, as the printing operation progresses, the flap 54 is rotated vertically downward, and the loop portion 68 is attached to the photographic paper 20 being fed.
to form. When the length of the loop portion 68 reaches an appropriate length (for example, a predetermined length of 4 m to 8 m, although it varies depending on the loop storage capacity of the reservoir portion), a cut mark is applied to the intermediate portion of the photographic paper 20 by the marker 47. This marker 47 may be used simultaneously or by a separate marker to provide a cut mark for indicating the cut portion by the cutter 34 between the printed images.

Thereafter, after the printing operation has progressed in the printing section 22 by a length corresponding to the length L of the photographic paper moving path between the printing section 22 and the cutter 64, the conveying rollers 60 and 62 are transferred to the photographic paper developing device i! By driving at the same speed as t14, the developing operation is performed continuously starting from the leading end of the photographic paper 20. That is, when this cut mark virtually passes the sensor 53, the photographic paper is sent to the developing section.

As the printing and development progress and the cut mark provided by the marker 47 is detected by the cut mark detection sensor 53, the cutter 64 cuts the intermediate portion of the photographic paper 20. When the intermediate portion of the photographic paper 20 is cut by this cutter 64, the photographic paper 20 is interposed between the cutting tip and the printing section 22.
Since the image frames have already been printed on the , there is no wastage of photographic paper.

That is, when the printing operation in the printing section at12 is performed continuously without interruption, the printing speed is fast, so the loop section 68 is always formed, and the cutter 64 cuts the photographic paper 2.
There is no problem even if the middle part of 0 is cut.

Furthermore, if there is a long interruption in the printing operation in the printing device 112, the photographic paper that was in the loop section 68 will gradually move to the leading edge of the photographic paper.
714, and if the interruption in the printing device 12 continues, the loop part 68 is canceled and the cut mark given by the marker 47 is detected by the cut detection sensor 53, and the photographic paper 20 is cut. be done. However, even after the cut mark has been applied with the marker 47, the length has already been burned, so even if the loop part 68 is completely eliminated,
When the cut mark is detected by the cut mark detection sensor 53 and cutting work is performed using the cutter 64, the cut mark 64 is detected by the cut mark detection sensor 53.
Since an image has already been printed on the photographic paper 20 located between the cutting section 4 and the printing section 22, the cut section is continuously developed in the photographic paper developing device 114, and the cutting section and the printing section The photographic paper between it and 22 remains stationary.

The slack portion 66 is always formed while the photographic paper 20 is being advanced, and is caused by the speed difference between the photographic paper 20 that is continuously conveyed in the photographic paper developing device 14 and the cutter 64 that temporarily interrupts conveyance when cutting. Since it has the role of absorbing water, it is only necessary that there is some slack.

Therefore, even if the cutting operation is started, there is no need to return the photographic paper 20 in the opposite direction, and the developing operation can be restarted by printing an image accurately and without waste at the next position of the printed image before interruption.

In the above-described embodiment, the cut mark provided by the marker 47 may be any type that can be detected by the cut mark detection sensor 53, such as a dot display or a punched hole.

[Effects of the Invention] As explained above, the present invention prints an image from the leading edge of the photographic paper, stops this leading edge upstream of the developing section, and then prints the image onto the photographic paper, forming a loop section in the middle of the photographic paper. At the same time, a cut mark is added to the photographic paper, and after that, an image is printed for a length corresponding to the length between the printing section and the cutter section downstream of the loop section, and then the leading edge is sent to the developing section and sequentially Since the photographic paper is characterized in that the middle part of the photographic paper is cut when the cut mark reaches the cutter section after development, it has an excellent effect of eliminating waste of photographic paper.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a printing and developing device to which the photographic paper printing and developing method according to the present invention is applied, and FIG. 2 is an enlarged view showing a printing section. 12...Printing device. 14... Photographic paper developing device, 20... Photographic paper. 22... Burning part, 24... Reservoir part. 47...Marker, 52...Cutter, 53...Cut mark detection sensor.

Claims (1)

[Claims] (1) Print an image from the leading edge of the photographic paper, stop this leading edge upstream of the developing section, and then print the image onto the photographic paper to form a loop in the middle of the photographic paper and make cut marks on the photographic paper. After that, an image is printed for a length corresponding to the length between the printing part and the cutter part downstream of the loop part, and then the tip part is sent to the developing part and developed sequentially, so that the cut mark is on the cutter part. A printing and developing method for photographic paper characterized by cutting the middle part of the photographic paper when it reaches .