JPH03232652A - Method for preventing defective conveyance of cut sheet - Google Patents

Abstract

PURPOSE:To prevent the occurrence of defective conveyance by cutting off the tip part of a paper by a given length so that at the starting of a print work, the deformed part of a photographic paper due to a direction converting roller is displaced from the tip part of a cut sheet. CONSTITUTION:At the starting of a work, a draw roller, a feed direction converting roller 15, and a conveyance roller are driven by a given amount to draw a paper 12 by a specified length L3. After completion of drawing a tip part 12c of the paper 12 is cut by the amount equivalent to a draw amount L3 by means of a cutter 30. Thus, the position of a deformed part 12b due to the converting roller 15 is displaced from a position intended to be cut and moved toward the central part of a cut sheet. A work is transferred to a normal print work, the paper 12 is conveyed and cut by the amount equivalent to one frame at a time, but the deformed part 12b is positioned at a central part in a state to be displaced from the cut part of the cut sheet. Thus, when a next cut surface passes a cut sheet insertion port, it is prevented from catching, and defective conveyance is prevented from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method used in a cut sheet development type printer processor and for preventing defective conveyance of cut sheets.

[Conventional technology] A problem with poor feeding of cut sheets is to print and expose an image on a long piece of photographic paper, then cut it out frame by frame to form a sheet, and transport the cut sheets to a part of the processor where they are sequentially processed. A cant sheet development system is known in which the development process is performed in a number of steps.

In order to miniaturize the printer section of this type of printer processor, a direction changing roller is placed between the magazine containing the photographic paper in roll form and the horizontal exposure position, and the conveyance path is L-shaped. ing.

During printing, the photographic paper is pulled upward from the magazine and is turned horizontally by a direction changing roller before reaching the exposure position. When the image of the photographic film is printed on the photographic paper at this exposure position, the photographic paper is transported one frame, and after being cut into sheets by a cutter installed at the end of the exposure position, the printer section and part of the processor are separated. It is transported to a part of the processor through an entrance provided between the two. Note that this entrance is designed to prevent outside light from leaking into the printer section even if the lid is opened during inspection of a part of the processor, or to prevent brown stains from processing liquid from flowing into the printer section. , formed into a thin sphnod-like shape.

Problems to be Solved by the Invention] When the operation is stopped, such as at night, the photographic paper is left wrapped around the direction changing roller for a long time.

Therefore, the portion wrapped around the direction changing roller becomes curled and deformed into a curled shape.

When operation is restarted in such a state, the curled portion may correspond to the planned cutting position of the cut sheet. In this case, the leading edge of the cut sheet is in a warped state, and this leading edge gets caught in the B entrance or a part of the processor, causing jamming and poor conveyance.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for preventing poor conveyance of cut sheets, which can prevent defective conveyance of photographic paper due to deformation of the photographic paper caused by long-term suspension of operation.

[Means to solve the problem]

In order to achieve the above object, the method of the present invention cuts off the leading edge of the photographic paper by a predetermined length at the start of printing work so that the deformed portion of the photographic paper by the feed direction conversion roller does not become the leading edge of the cut sheet. This is how it was done.

[Effect]

According to the above configuration, the leading end of the photographic paper is cut off by a predetermined length at the beginning of the workday. Therefore, the deformation of the photographic paper caused by the feed direction conversion roller, which tends to occur when the printer is stopped for a long time while the photographic paper is set inside the printer, does not become the leading edge of the cut sheet, so the cut sheet is placed at the slit-shaped entrance. This eliminates problems such as buckling and transport failure.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

〔Example〕

FIG. 1 shows a schematic diagram of a printer processor embodying the present invention. The printer processor 10 includes a printer section 10a for printing a negative image recorded on a negative film 11 onto photographic paper (hereinafter simply referred to as paper) 12.
and a processor part 10b for developing the exposed paper 12.

The long paper 12 is stored in a roll form in a magazine 13, and this magazine 13 is set at the bottom of the printer section 10a. Paper 12 is pulled out by roller 14
After being pulled out by the paper mask 16, the conveying direction is converted to the horizontal direction by the feeding direction conversion roller 15
and the adsorption device 17.

At the time of exposure, air inside the adsorber 17 is sucked out by a compressor, and the suction device 17 adsorbs the paper 12 at the exposure position through countless small holes provided at the upper part.
2. Maintain good flatness.

A film carrier 18 is arranged opposite to the exposure position, and the negative film 11 is set thereon.

A lamp 19 for illuminating the negative film 11 is housed in a lamp housing 20, and light emitted from the lamp passes through a filter turret 21 and then enters a mixing box 22. This filter turret 21
A red filter, a green filter, a blue filter, and a photometric aperture are provided with fixed notches.The photometric aperture is set on the optical axis 23 during photometry, and the three color filters are sequentially placed on the optical axis 23 during printing. is set to sequentially expose three color planes.

The mixing box 22 is made of a diffusible material 9, such as styrofoam.

This mixing box 22 has a mirror 24 inside it.
are arranged at an angle of 45 degrees, and a diffuser plate 25 is fixed to the lower end. The negative film 11 is illuminated by the printing light that has passed through the diffuser plate 25, and the printing light that has passed through the diffuser plate 25 reaches the exposure position via the printing lens 26 and the shutter 21.

On the right side of the exposure position, there is a conveyance roller 28. cutter 3
0 is placed. The conveyance roller 28 and the feed direction conversion roller 15 are connected to a pulse motor 31.
A tribar 32 is connected to this pulse motor 31. Further, the canter 30 is actuated by the drive unit 34 to separate the exposed frames into a cut sheet 12a. The controller 33 includes a driver 32 of the printer section 10a, a drive section 34 . In addition to the filter left 21, shank 2, etc., each part of the processor part 10b is sequence-controlled.

Print modes include border mode, which cuts the middle of the unexposed area (edge) between images to create a print with a border, and borderless mode, which cuts the border between the images and the border. There are two types: a borderless mode for creating prints, and a borderless mode for creating prints.
The user selects this information at the beginning of the workday and sends this information to the controller 3.
Enter 3.

After the exposed paper 12 is fed one frame by the transport roller 28, it is stopped at - time, and in the case of the edge mode, the center of the edge is cut by the cutter 30, and in the case of the edgeless mode, it is By cutting twice, the white border (for example, 8 mm width) between the two printed images is cut off. A tranche box 35 is provided below the cutter 30 for storing the cut-off white edge.

The obtained cut sheet 12a is transferred to the conveying roller pair 36.3.
7 to the processor part 10b. An elongated slit-shaped entrance 38 is provided between the printer section 10a and the processor section 10b to prevent light leakage.

Inside the processor part 10b is a well-known color developing tank.

A developing processing section 40 consisting of a bleach-fixing tank and a rinsing tank, and a drying section 41 for drying the cut sheet 12a after the development processing are arranged. It is transported to the processing section 40.

The conveyance roller 42 is continuously driven at a constant speed by a motor 43 together with the conveyance rollers 36 and 37.

The photo-developed cut sheet 12a is sent to the drying section 41 by a conveyance system (not shown), dried by blowing hot air, and then discharged from the discharge port 45.

By the way, if the operation has been stopped for a long time with the paper 12 remaining in the conveyance path to the exposure position,
As shown in FIG. 3(A), the paper 12 that has been in contact with the feed direction conversion roller 15 is curled over the length L2, and a curled deformed portion 12b is formed. Here, since the positional relationship between the feed direction conversion roller 15 and the cutter 30 is constant, as shown in FIG.
The distance from the tip 12c to the center of the deformed portion 12b is also constant. As shown in Figure 3, paper mask 1
6 opening width. , the edge width of the paper 12 is , then in the case of a green print, the width of the cut sheet 12a is "L0+Ll".

If the result of dividing L by this r L 11 + L r J is an integer, as shown in FIG. 3(B), the deformed part 1
The center portion of 2b corresponds to the cutting position. Also,
In the case of borderless printing, the leading edge is cut off by cutting twice, so the deformed portion 12b becomes the tip of the cant sheet 12a.

If the printing operation is restarted when the middle of the deformed part 12b becomes the tip of the cut sheet 12a, for example, in a print with a border, the central part of the deformed part 12b is cut and the cut sheet 12a is cut, as shown in FIG. The flatness of the tip deteriorates significantly. If this cut sheet 12a is conveyed as it is, as shown in FIG. 6, the leading end of the cut sheet 12a will get caught in the entrance 38 or inside the processor part 10b, causing jamming, which will only interrupt the printing operation. Otherwise, it may cause the printer processor 10 to malfunction.

Therefore, when starting work the next morning after the operation has stopped overnight, the leading end of the paper 12 is cut off to a certain length, for example, 24 mm. As a result, the positional relationship between the cut position and the deformed portion 12b is shifted, and the flatness of the leading end of the resulting cut sheet 12a is improved, so that the cut sheet 12a is
There will be no more jams at mag 8.

The operation of the printer processor 10 configured as above will be explained. When the power switch 39 is turned on, the controller 33 turns on the driver 32 as shown in FIG.
The pulse motor 31 is driven via the pull-out roller 1.
4. Feed direction conversion roller 15. The anti-feed roller 28 and the like are driven by a certain amount.

As a result, the paper 12 is pulled out from the magazine 13 by a certain length L3 (for example, 24 mm). After this drawing is completed, the controller 33 operates the canter 30 via the drive unit 34 to cut off the leading end 12c of the paper 12 and place it into the Tranosh Bonox 35.

By cutting off the tip, the position of the deformed portion 12b shifts from the planned cutting position and moves toward the center of the cut sheet 12a, as shown in FIG. 3(C).

Next, the normal printing operation begins. In this case, first place the negative film 11 on the film carrier 18 and then operate the start button. The frame to be printed is measured by a photometric sensor (not shown) through the photometric aperture. The printing exposure amount for each color is calculated from the measured value. Next, the filter turret 21 is rotated, and the red filter, green filter, and blue filter are centered on the optical axis 23 for a time corresponding to the exposure amount of each color. While the respective color filters are set on the optical axis 23, the shutter 27 is opened and closed, and a sharp image is printed on the paper 12 at the exposure position by sequential exposure of three colors. Note that even if the deformed portion 12b is located approximately at the center of the exposure position, the flatness of the paper 12 is maintained well by suction by the suction device 17.

When the printing exposure of the first negative image on the second cut sheet is completed, the pulse motor 31 is driven and after conveying the paper 12 for one frame (LO+L),
30 operates to cut into cut sheets 12a. The cut sheet 1-12a passes through the loading port 38 and enters the processor part 1.
0b, is subjected to development processing in the development processing section 40, is dried in the drying section 41, and is discharged from the discharge port 45.

Thereafter, each frame of the negative film is printed in the same manner, but as shown in FIG. 3(C), the deformed part 12b is located at the rear of the third cut sheet, and It is not located at the tip of the Therefore, there is no risk that this fourth cut sheet will get caught in the insertion slot 38 or the processor part 10b. Note that in borderless printing, the cutter 30 is operated twice to cut off the width L1 of the white border.

In the above embodiment, the leading edge of the paper 12 is cut off in one step, but a cutting mode performed in borderless printing may also be used. In this case, cut 3 times in 8mm increments, cutting off a total of 24mm. Alternatively, instead of automatically cutting off the paper by turning on the power switch, you can also cut it manually using the paper feed key and the cut operation key.

Note that the deformed portion 12b may be regarded as the same as a joint portion (splice) of the paper 12, and the deformed portion 12b itself may be cut off after being transported so that the deformed portion 12b is not exposed to printing.

[Effects of the Invention] As described above in detail, according to the printer processor of the present invention, the deformed portion of the photographic paper by the feeding direction conversion roller does not become the leading edge of the cant sheet when the photographic paper is started. Since the leading end portion is cut off by a predetermined length, it is possible to prevent defective conveyance of the canted sheet due to the deformed portion by 4°.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a printer processor of the present invention. FIG. 2 is a schematic diagram showing the relationship between the feed direction conversion roller and the cutting position. FIG. 3 is a schematic diagram showing the relationship between the deformed portion and the cutting position. FIG. 4 is a flowchart illustrating the method of the present invention. FIG. 5 is a schematic diagram showing a situation in which the center portion of the deformed portion is cut off. FIG. 6 is a schematic diagram showing the relationship between the cut sheet and the entrance when a part of the deformed portion becomes the leading end of the cut sheet. 10...Printer processor 10a...Printer section 1, Ob...Processor part 12...Paper 12a...Cant sheet 15...Feeding direction conversion roller 30...Cutter 38 ... Loading entrance. Figure Figure

Claims (1)

[Claims] (1) Pull out the photographic paper from a magazine case that stores a long photographic paper in roll form, guide it to the exposure position via a feed direction conversion roller that changes the conveyance direction, and transfer the exposed photographic paper to the size of one frame. In a printer processor that separates the photographic paper into cut sheets and processes them for development, the leading edge of the photographic paper is cut off by a predetermined length at the start of printing work so that the deformed portion of the photographic paper by the feed direction conversion roller does not become the leading edge of the cut sheet. A method for preventing conveyance defects of cut sheets, characterized in that: