JPH06175233A - Trial printing controller for photograph printing device - Google Patents

Abstract

PURPOSE:To obtain a trial printing and carrying controller which executes the trial printing of necessary minimum length for laying over two pairs of carrying rollers and carrying in the post process such as developing processing or the like and reduces the disusing wasteful area of the leading edge part of a photosensitive material. CONSTITUTION:After the leading edge of a photographic paper 22 is detected by a sensor 120, the paper 22 is reversely fed by the necessary minimum length M that the paper 22 can be nipped by the main feeding roller 114 by reversely rotating the main roller 114 and the feeding roller. Besides, the reverse feeding quantity M is set to be equal to M' (about 60mm) or somewhat shorter than it. A trial printing and carrying pitch P is changed to about 20.3mm from the conventional pitch of about 25.4mm. As the result, about 45.7mm is totally saved. Thus, only slight difference is generated with respect to the length 560mm which is the length required for being carried in the post process and which is required for the conventional trial printing and the paper 22 is prevented from being waste caused by the enlargement of an exposure stage 84.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trial printing control apparatus for a photo printing apparatus, which performs a trial printing for printing an image for setting an exposure condition before a printing process.

[0002]

2. Description of the Related Art Photographic printing apparatuses having an automatic loading mechanism have been known. In this photographic printing apparatus, when a magazine containing long photosensitive material such as film or paper wound in layers on a spool shaft is set, the leading end of the photosensitive material is nipped by a pair of rollers to hold the magazine. Then, the widthwise end portion of the photosensitive material is guided by a guide provided along the conveying path to load the photosensitive material. An exposure unit provided with a variable mask whose mask range can be changed is provided in the middle of the transportation path, and a feed roller for nipping and transporting the photosensitive material is disposed downstream of the exposure unit. After nipping the leading edge of the photosensitive material to the feed roller, the photosensitive material is conveyed by the feed roller to position the unexposed area in the exposed area, and the mask range is changed according to the size of the image to be printed, and the image is printed. I do.

The photosensitive material, which has been baked, is cut by a cutter portion arranged on the downstream side of the exposure portion and sent to a subsequent process such as a developing process.

With such an automatic loading mechanism, after the magazine containing the photosensitive material is set in the photographic printing apparatus, the leading end of the photographic material is taken out from the magazine manually, for example, and is conveyed in the photographic printing apparatus. It is not necessary to carry out complicated operations such as guiding along with loading and loading, or manually rewinding the photosensitive material and storing it in a magazine, thus saving labor.

By the way, before loading the above-mentioned printing process, after the loading, a trial printing is performed in order to set the exposure conditions according to the type of the photosensitive material to be applied. For example, trial baking is usually performed 9 times. It is possible to prevent waste of the light-sensitive material by making the length of the light-sensitive material used by this trial baking from the tip end as short as possible.

In the conventional printing apparatus, the minimum length required when the photosensitive material is cut and conveyed by the cutter section is, for example, 560 mm. That is, in order to convey the photosensitive material in a post-process such as development processing, it is necessary to nips the conveying roller pair at least at two places, and the length of the photosensitive material for passing between the conveying rollers is required. Become.

Therefore, the total length is 56 after 9 trial firings.
If the trial baking area (length in the conveying direction) and the pitch between the trial baking areas are set so as to be 0 mm, the photosensitive material is not wasted and the minimum length (560 mm) is required.
You can do trial baking within. Specifically, since the length of the unexposed portion at the tip of the photosensitive material is 330 mm, the trial baking area (length in the transport direction) is set to 1 inch per batch,
By setting the distance to about 229 mm for 9 times, trial baking can be performed at about 560 mm from the tip of the photosensitive material.

By the way, in recent years, it has become necessary to print an image of a size larger than the mask changing area in the exposure section. Therefore, the area occupied by the exposure section is widened to cope with the conventional apparatus, and the mask changing area is increased. Is trying to expand.

As a result, by improving a part of the conventional apparatus, it becomes possible to print a large size image which cannot be printed.

[0010]

However, if the exposed portion is made larger, the distance between the optical axis and the cutter that cuts the rear boundary of the trial baking area in the conveying direction becomes longer, and the photosensitive material is conveyed longer by that amount. It will be wasted. For example, taking the conventional device as an example, it is about 100 ~
A large amount of 110 mm photosensitive material must be transported, and there is a wasted area at the tip of the photosensitive material that is not used at all.

In consideration of the above facts, the present invention can perform trial baking with a minimum length required for transporting by straddling two pairs of transport rollers in a post-process such as a developing process. It is an object of the present invention to obtain a trial printing control device for a photo printing apparatus, which can reduce an unused area of the front end of the printer.

[0012]

The invention according to claim 1 is
It is used in a photographic printing device that pulls out a photosensitive material from a magazine containing a long photosensitive material and prints the image with this photosensitive material positioned at the printing position of the exposure section. A trial printing control device for a photographic printing apparatus for performing n (n ≧ 2) times of trial printing and setting exposure conditions, comprising a pair of transport rollers provided near a downstream side of the exposure unit, and the transport. A sensor that is provided further downstream of the roller to detect the presence or absence of the photosensitive material, and a cutter that is provided at a position of a length K from the optical axis of the exposure unit and cuts the photosensitive material based on the detection result of the sensor. Section, a reverse feed control unit that reverses the conveyance roller to rewind the photosensitive material by a length M when the sensor detects the leading end of the photosensitive material, and a position that is rewound by the reverse feed control unit. Try as a reference A conveyance control means for intermittently conveying the test print feed pitch P at the start of the printing, and a length from the leading edge of the photosensitive material of the region of the photosensitive material subjected to the test print at the end of the test print in a post-process such as a developing process. 2 photosensitive materials
The number of trial bakings n, the length M, and the pitch P are set to K−M + {P / 2 + (n−1) × P} ≧ L so that the length L is enough to be passed over between the pair of rollers and fed. .. (1) is set so that the setting means is set.

[0013]

According to the first aspect of the present invention, the photosensitive material is drawn out from the magazine, and first, a trial print for setting conditions for setting the exposure conditions according to the type of the photosensitive material is performed.

That is, the photosensitive material is loaded,
When the sheet is nipped and conveyed by the conveyance roller near the downstream side of the exposure section, the sensor detects the leading edge of the photosensitive material.

When the tip of the photosensitive material is detected by the sensor, the reverse feeding control means reverses the conveying roller to rewind the photosensitive material by the length M.

As a result, the initial position for trial baking is determined, and the conveyance control means intermittently conveys the photosensitive material to perform trial baking n times. This intermittent conveyance is performed by trial baking feed pitch P.
Is transported so that When the trial baking is completed, the trailing end of the trial baking area is cut by the cutter portion, and is sent to, for example, a developing device in a subsequent process. At the cutting position of the cutter portion, the length from the optical axis of the exposure portion is K.

At this time, in the setting means, the length from the front end of the photosensitive material of the region of the photosensitive material to be subjected to the trial baking at the end of the trial baking is passed between at least two pairs of rollers in a post-process such as a developing process. The number of trial bakings n, the length M, and the pitch P are set so that the length of the material is obtained. That is, each parameter is set so that K−M + {P / 2 + (n−1) × P} ≧ L ... (1) holds.

As a result, the length of the photosensitive material used for trial baking cut and conveyed by the cutter portion can be suppressed to a necessary minimum and waste of the photosensitive material can be prevented.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a schematic configuration of a printer section 12 of a printer processor 10 according to this embodiment.

The printer unit 12 is provided with a loading unit 16 on the upper side thereof, and the loading unit 16 is loaded with a magazine 18. As shown in FIG. 2, the magazine 18 is a magazine body 1
8A and an opening / closing lid 18B that is rotatably attached to the back surface of the magazine body 18A via a hinge 20, and a detachable spool 152 is mounted inside. A winding core 154 of the photographic printing paper 22 wound into a roll is fitted in the spool 152. Legs 24A and 24 are provided below the magazine body 18A and the opening / closing lid 18B, respectively.
Two B are attached.

A gear 156 is coaxially fixed to the side portion of the spool 152 (outside the magazine 18).
A gear 157 meshes with 56. Also, the gear 157
The gear 158 meshes with the gear 158, and the gear 158 meshes with the gear 159. The gear 160 is coaxially fixed to the gear 159 and is covered with a cover 161 having an opening. As described later, the gear 160 is moved to the position C with the magazine 18 loaded, and meshes with the gear 162 rotatably supported on the printer section 12 side through the opening. These gears 157, 158, 159, 160,
162 constitutes a spool shaft drive system 163 (see FIG. 3).

Photographic paper 22 drawn from a paper roll
Are sent to a paper port 26 provided with a passage for the photographic paper 22. This paper port 26 is the magazine body 18A.
Is fixed to the upper part of the front surface of the printer, and a notch 26A is formed in the front end of the printer so that the feed roller pair 28 arranged in the printer unit 12 can be inserted therein. The paper port 26 is provided with a light blocking member 30.
0 is connected to the attachment / detachment detection pin 34 via the lever 32.

The light shielding member 30 is held by the biasing force of the spring 36 in a position projecting into the passage as shown in FIG. 2, and in this state, the entry of light into the magazine 18 is prevented. The magazine 18 is loaded into the loading unit 16 and the projection 3
When the attachment / detachment detection pin 34 is pressed by 8, the lever 32 is rotated counterclockwise against the biasing force of the spring 36, and the light shielding member 30 is retracted from the passage of the photographic paper 22.

When the magazine 18 is loaded into the loading section 16, the magazine body 18 is opposed to the wall 16A of the loading section 16.
On the side of A, the size, face type, and
A signal section 40 in which information such as sensitivity is recorded in the form of a bar code.
Is provided. A photo sensor 42 that optically reads the barcode is provided at a position corresponding to the signal unit 40 on the wall 16A of the loading unit 16. The photo sensor 42 is connected to the control circuit 44 (see FIG. 3) and outputs the read information to the control circuit 44.

A magazine table 46 is slidably provided under the loading section 16, and the magazine 18 is placed on the magazine table 46. A plate 48 is fixed to the magazine table 46,
The roller 50 is fitted in the groove 48A provided in the. The roller 50 is attached to an operation handle 54 which is rotated around a shaft 52 as a fulcrum. When the operation handle 54 is manually operated to rotate,
The magazine table 46 is moved in the direction of arrow A in FIG. 2 and the opposite direction.

A loading detection sensor 56 is provided at a position corresponding to the middle of the moving range of the plate 48.
The loading detection sensor 56 is composed of a pair of a light emitting element and a light receiving element, and is connected to the control circuit 44 (see FIG. 3). When the magazine 18 is placed on the magazine table 46 and moved in the direction of loading in the loading unit 16 (the direction of arrow A in FIG. 2), the plate 48 is loaded before the loading of the magazine 18 in the loading unit 16 is completed. Corresponding to the detection sensor 56, the loading detection sensor 56 is turned on.

On the other hand, when the magazine 18 is loaded in the loading section 16, a gear 164 is coaxially fixed to the lower roller of the feed roller pair 28 disposed at a position corresponding to the paper port 26. And this gear 16
The gear 165 is meshed with the gear No. 4, and the gear 166 is meshed with the gear 165. These gears 164, 165, 166 form a feed roller drive system 167 (see FIG. 3).

A pin clutch mechanism 168 is provided in the vicinity of the position where the feed roller drive system 167 and the spool shaft drive system 163 are arranged.
The driving force of the motor 58 is transmitted to 68 via the belt 169. Although detailed description of the structure of the pin clutch mechanism 168 is omitted, a plate connected to the feed roller drive system 167 and provided with an elongated hole, and a spool shaft drive system 163.
And a plate having a long hole provided therein, the clutch plate (not shown) having a pin implanted therein is moved to move the pin into the long hole of any one of the plates to drive the motor 58. Driving force is transmitted to the feed roller drive system 167 or the spool shaft drive system 163.

The clutch plate is moved by rotating the clutch lever 171 pivotally supported by the pin 170, and the gear system for transmitting the driving force is switched. A biasing force of a spring (not shown) is applied to the clutch lever 171, and a shaft of a solenoid 173 is attached to one end of the clutch lever 171. The clutch lever 171 normally applies the driving force of the motor 58 by the urging force of the spring to the feed roller drive system 16.
When the solenoid 173 is energized, the solenoid 173 is rotated against the biasing force, and the driving force of the motor 58 is transmitted to the spool shaft drive system 163. In addition,
When power is transmitted to the spool shaft drive system 163, the feed roller pair 28 connected to the feed roller drive system 167 is in an easily rotatable free state, and similarly, the feed roller drive system 167 is also in a free state. When the power is transmitted to the spool, the spool 152 connected to the spool shaft drive system 163 is in a free state.

With the driving force of the motor 58 being transmitted,
The feed roller pair 28 holds the printing paper 22 and pulls it out of the magazine 18. Further, a passage sensor 60 including a pair of a light emitting element and a light receiving element is provided in the vicinity of a portion where the feed roller pair 28 is provided. The passage sensor 60 is connected to the control circuit 44 (see FIG. 3), and is turned on when the leading end of the photographic printing paper 22 sandwiched by the feed roller pair 28 passes through the portion where the feed roller pair 28 is arranged.

A guide roller 62 is rotatably supported at a position separated from the feed roller pair 28 by a predetermined distance, and is coaxially supported between the feed roller pair 28 and the guide roller 62 coaxially with the guide roller 62. A swingable guide cam 64 is provided. The guide cam 64 is the motor 6
By transmitting the driving force of 6 (see FIG. 3),
Is swung between the position shown by the solid line and the position shown by the imaginary line.

A loop sensor 68 composed of a pair of a light emitting element and a light receiving element is provided below the feed roller pair 28 and the guide roller 62. When the guide cam 64 is moved to the position shown by the solid line in FIG. 1 with the photographic printing paper 22 being stretched between the guide roller 62 and the feed roller pair 28, the guide roller 62 and the feed roller pair 28 are In between, as shown in phantom lines in FIG.
Two loops 70 are formed. The loop sensor 68 is turned on when the loop 70 of the photographic printing paper 22 is larger than a predetermined size.

The photographic printing paper 22 is provided on the downstream side of the guide roller 62.
There is provided a feed roller 72 around which the photographic paper 22 is bent and which guides the photographic paper 22 by bending at about 90 °. Sending roller 7
No. 2 has two small-diameter rollers 174A arranged in the vicinity of the outer periphery thereof, and further has a small-diameter roller 174B arranged at a position separated from the feed roller 72. An endless belt 176 is wound around these small-diameter rollers 174A and 174B (three in total).

Passage detection sensors 172 and 175 are provided near the upstream and downstream of the delivery roller 72. Each of the passage detection sensors 172 and 175 is configured such that a light emitting element and a light receiving element are arranged so as to face each other with a conveyance path of the photographic paper 22 interposed therebetween. The passage detection sensors 172 and 175 are connected to the control circuit 44 (see FIG. 3), and are turned on when the leading end of the photographic paper 22 passes through the area where the passage detection sensors 172 and 175 are arranged.

A sub-exposure section 82 and an exposure stage 84 are sequentially provided on the downstream side of the delivery roller 72. The sub-exposure unit 82 is used when recording a binary document such as characters on the photographic printing paper 22, and prints the binary image recorded on the set negative film on the photographic printing paper 22. The exposure stage 84 is provided with a fixed paper mask 86 whose mask range is fixed.

On the other hand, a negative carrier 90 is attached to the mounting table 88 of the printer section 12.
A negative film 92 to be printed is set in the.
A light source unit 94 is arranged below the negative carrier 90. In the light source unit 94, a light source 96, a filter unit 98 including CC filters of C (cyan), M (magenta), and Y (yellow) and a light diffusion box 100 are sequentially arranged from the bottom.

Above the negative carrier 90, the lens 102, the black shutter 104 and the total reflection mirror 10 are provided.
Light rays emitted from the light source 96 and passing through the filter unit 98 and the light diffusion box 100 are transmitted through the negative film 92, and the photographic paper positioned on the exposure stage 84 by the lens 102 and the total reflection mirror 106. Imaged on 22. A variable guide 108 that guides the photographic printing paper 22 downward is provided on the downstream side of the exposure stage 84. The variable guide 108 has a pair of guide members, and the guide width is changed by transmitting the driving force.

Below the variable guide 108, the motor 11
A main feed roller 114, which is driven by 2 (see FIG. 3), is provided. Main feed roller 11
Three rollers 116A, 116 are provided in the vicinity of the four arrangement sites.
B and 116C are arranged and the rollers 116A and 11C are arranged.
An endless belt 118 is stretched around 6B and 116C. As for the rollers 116A, 116B, and 116C, the belt 118 is approximately 1 / about the outer circumference of the main feed roller 114.
The arrangement is defined so as to make contact over the range of 4. A certain tension is applied to the belt 118, and the photographic printing paper 22 sandwiched between the main feed roller 114 and the belt 118 is applied with the tension of the belt 118 as a predetermined nip pressure so that the main feed roller 114 is driven. Is bent by about 90 ° and conveyed in the horizontal state toward the downstream side.

Passage detection sensors 120 and 121 are provided adjacent to the main feed roller 114 on the upstream and downstream sides of the main feed roller 114. The passage detection sensors 120 and 121 are composed of a pair of a light emitting element and a light receiving element, and are turned on when the leading end portion of the photographic printing paper 22 sandwiched between the main feed roller 114 and the belt 118 passes a portion where the main feed roller 114 is arranged.

A cutter section 122 is arranged on the downstream side of the passage detection sensors 120 and 121. Cutter section 122
For example, when the size of the printing paper 22 to be printed is changed, the boundary between the exposed portion and the unexposed portion of the printing paper 22 is operated in a state of corresponding to the cutter portion 122, and the printing paper 22 is cut. To do. The position of the cutter unit 122 is set to a position having a length K from the optical axis of the exposure unit 84.

Guide rollers 124 and 126 are rotatably arranged at a predetermined interval downstream of the cutter section 122. A guide cam 128 is provided between the guide roller 124 and the guide roller 126 so as to be coaxially supported by the guide roller 124 and swingable. Guide cam 1
28 is oscillated between a position shown by a solid line and a position shown by an imaginary line in FIG. 1 by transmitting a driving force of a motor 129 (see FIG. 3). With the photographic printing paper 22 suspended between the guide rollers 124 and 126, the guide cam 128
1 is moved to the position shown by the solid line in FIG. 1, a loop 130 of the printing paper 22 is formed between the guide rollers 124 and 126 as shown by the imaginary line in FIG.

A feed roller 134 is arranged near the guide roller 126, and the feed roller 134 is provided.
A feed roller 136 is disposed diagonally above. The feed rollers 134 and 136 are rotated by the driving force of a motor 138 (see FIG. 3) being transmitted, and convey the photographic printing paper 22. On the downstream side of the portion where the feed roller 134 is provided,
Adjacent to the feed roller 134, the passage detection sensor 150
Is provided. The passage detection sensor 150 is composed of a pair of a light emitting element and a light receiving element, and is turned on when the front end of the photographic printing paper 22 passes a portion where the feed roller 134 is disposed. A cutter unit 151 is provided in the vicinity of the downstream side of the passage detection sensor 150, and is selectively used as the cutter unit 122 depending on the processing situation. That is, when the photographic printing paper 22 is continuously processed, it is cut into a predetermined amount by the cutter unit 151 disposed near the downstream side of the passage detection sensor 150, and when the processing is completed, the cutter unit 122 cuts the exposure unit and the unexposed unit. The boundary with the exposed portion is cut off.

A loop forming means (not shown) is provided between the feed roller 134 and the feed roller 136 to form the loop 140 of the printing paper 22.
The variable guides 142 and 144 are respectively provided at the positions where the feed rollers 134 and 136 are arranged. Variable guide 1
The guide width of 42 and 144 is changed by transmitting the driving force. The photographic printing paper 22 that has passed the portion where the feed roller 136 is disposed is conveyed toward the processor unit 14.

The processor section 14 is provided with a plurality of processing baths (not shown), and a processing liquid such as a developing liquid is stored in each processing bath. The printing paper 22 conveyed to the processor unit 14 is dipped in the processing liquid in each processing tank and processed.

Here, in the printer unit 12 of this embodiment,
Prior to the printing process, trial printing is performed to set the exposure condition for correcting the exposure condition (density difference) that varies depending on the type of the printing paper 22.

In the trial printing, the printing process is normally performed on the printing paper 22 nine times using a reference negative or the like.

By the way, as shown in FIG.
2, the tip is a passage detection sensor 12 due to loading.
It is stopped at the time when it is detected by 0, and if the trial printing is performed 9 times from this state, the printing paper 22 on the front side of the first trial burning area on the printing paper 22 becomes a useless area.

Therefore, in this embodiment, after the leading edge of the photographic printing paper 22 is detected by the passage detection sensor 120, the main feed roller 114 and the feed roller 72 are reversed, and the photographic printing paper 22 can be nipped by the main feed roller 114. The necessary minimum length M is sent back. It should be noted that this backfeed amount M is about 60 mm.

Further, in the printer section 12 of the present embodiment, the exposure stage 84 is made larger than the conventional apparatus in order to enlarge the enlargement size, and as a result, the exposure stage 84
Upstream mask position Pp of the main feed roller 114
The photographic paper transporting distance between the photographic paper nip area and the middle point Pc is extended.

By enlarging the exposure stage 84, the photographic printing paper 22 can be saved by about 60 mm by the reverse feeding control, but if the feeding pitch P for the trial printing is the same as the conventional one, the printing required for the trial printing is performed. The length of the paper 22 still needs to be increased by about 48 mm.

Therefore, in this embodiment, the trial baking feed pitch P is changed from the conventional about 25.4 mm (1 inch) to about 20.3 mm (0.
8 inches) to save a total of about 45.7 mm (1.8 inches). This allows the length required for conventional trial baking.
There is only a slight difference for 560 mm (48 mm-4
5.7 mm), a minimum length required for conveyance in the subsequent process is secured, and waste of the printing paper 22 due to enlargement of the exposure stage 84 is prevented.

That is, although the developing process is normally carried out in the subsequent process, in the developing device for carrying out this developing process, the photographic printing paper 22 is hung between the rollers arranged along the conveying path, and the photographic printing paper 22 is printed. The nip of 22 guides and conveys. This roller pitch L is 56
Since it is 0 mm, the length of trial baking was set to 560 mm in the past. Also in this embodiment, it is possible to perform the trial baking with the minimum required length while ensuring the length required for the conveyance in the subsequent process. In this case, the number of trial firings is secured.

The above numerical value setting is KM + {P / 2 +
It is a condition that (n−1) × P} ≧ L holds, and is a numerical value that can minimize the value of L in the trial baking of n = 9 times. It should be noted that K is the length from the optical axis to the cutter section 122, M is the reverse feed amount, P is the trial baking pitch, n is the number of trial bakings, and L is the minimum required length in the subsequent process.

Next, the operation of this embodiment will be described. First,
The procedure of loading the photographic printing paper 20 after loading the magazine 18 will be described with reference to the flowcharts of FIGS.

By mounting the magazine 18 containing the photographic paper 22 on the magazine table 46 and rotating the operation handle 54, the magazine 18 is moved together with the magazine table 46 and loaded into the loading section 16. When the loading detection sensor 56 is turned on during this loading operation (step 200 shown in FIG. 5), the motor 58 is driven to feed the feed roller pair 28.
Is rotated (step 202). At this time, printing paper 2
0 is a certain amount of tongue sticking out from the magazine 18,
The leading edge of the photographic printing paper 20 is guided to the nip portion of the feed roller pair 28. As a result, the leading end of the printing paper 22 can be held between the feed roller pair 28 and pulled out from the magazine 18.

Next, when the leading edge of the photographic paper 22 passes through the portion where the feed roller pair 28 is disposed and the passage detection sensor 60 is turned on (step 204), the rotation of the feed roller pair 28 is once stopped and the motor 66, After driving the guide cam 64 to move it to the horizontal position (the position shown by the imaginary line in FIG. 1) 130, the rotation of the feed roller pair 28 is restarted (step 206). In the next step 208, the feed roller 72 is rotated. As a result, the printing paper 20 is supported by the guide cam 64 and reaches the delivery roller 72.

The delivery roller 72 has an endless belt 1
Since 76 is in contact with the position of the peripheral surface and is rotated,
The photographic printing paper 22 includes the delivery roller 72 and the belt 176.
It is sandwiched between and 90 degrees (from horizontal to vertical)
It is transported after changing its direction.

When the leading edge of the photographic printing paper 22 is detected by the passage detection sensor 175 (step 210), the guide cam 64 is rotated clockwise in FIG. 1 to the vertical position and the feed roller 72 is driven. Are stopped (steps 212, 214).

At this time, since the feed roller pair 28 is continuously driven, a loop 70 is formed between the feed roller 72 and the feed roller pair 28. When the loop 70 is detected by the sensor 68, the feed roller pair 28 is fed. Roller 72
Is restarted (steps 216 and 218). Therefore, the photographic printing paper 22 is conveyed to the sub-exposure unit 82 while maintaining the size of the predetermined loop 70.

If there is a difference in transport speed between the feed roller 72 and the feed roller pair 28, the loop 7
It is absorbed by the change of the size of 0, and there is no trouble such as tension of the photographic printing paper 22 and stable conveyance is performed.

Next, at step 220, the motor 112
The main feed roller 114 is rotated by. The front end of the photographic printing paper 22 has a sub-exposure unit 82, an exposure stage 84,
The variable guide 108 passes through the site where the variable guide 108 is disposed and is nipped between the main feed roller 114 and the belt 118. When the leading edge of the photographic paper 22 passes through the portion where the main feed roller 114 is disposed, the passage detection sensor 120 is turned on (step 222), and the feed roller pair 28 and the delivery roller 7 are provided.
2. The rotation of the main feed roller 114 is stopped (step 224).

Here, there is some distance between the passage detection sensor 120 and the main feed roller 114, and the photographic printing paper 22 is wasted accordingly.

Therefore, in this embodiment, after the rotation of the main feed roller 114 is stopped, at step 226 shown in FIG. 5, the main feed roller 114 and the feed roller 72 are reversed for a predetermined time, and a predetermined amount (the above waste) (Corresponding to the distance). Rewind the photographic paper 22.

As a result, the waste of the printing paper 22 can be eliminated. In this case, the rewound printing paper 22
Is absorbed by a change in the size of the loop, so that the photographic printing paper 22 does not slacken in a conveyance path other than the loop forming portion.

The printing paper 22 loaded in this way
A trial baking is performed before the baking processing.

That is, the first printing process is performed with the reference negative set in the negative carrier 90 (step 228). Then, it is conveyed by 20.3 mm (0.8 inch) (step 230), and the trial baking and step conveyance are repeated until the number N of trial bakings reaches 9 (steps 232, 234). When it is determined in step 234 that the trial printing has been completed nine times, N is returned to the initial value 1 in step 236, and in step 238, the main feed roller 114 and the delivery roller 72 are rotated to cause the printing paper 2
No. 2 is conveyed, and when the rear side boundary of the ninth trial baking area reaches the cutter section 122 (step 240), it is cut at this boundary part (step 242) and sent to the processor section 14 for development processing. The exposure condition is set according to the result (step 244).

When the exposure conditions have been set, step 2
At 46, a baking process is performed. In this printing process, each image is printed by a predetermined amount in steps, and
It is sent out to the processor unit 14 continuously in a long length, or cut and sent out for each order.

In this way, the photographic printing paper 22 is moved from the detection point Ps of the passage detection sensor 120 on the downstream side of the feed roller 114 to the photographic paper 22.
Is reversely fed by a length equal to or slightly shorter than the length M ', and the trial baking feed pitch P is changed from the conventional 25.4 mm (1 inch) to 20.3 mm (0.8 inch), resulting in a total of about 45.7 mm (1.
8 inches) can be saved. As a result, the shortest length of 560 mm required for conventional trial baking and transportation in the post-process (transportation while the photographic printing paper 22 is stretched between two pairs of rollers during development processing) Only a slight difference occurs (48 mm-45.7 mm), and it is possible to prevent waste of the photographic printing paper 22 due to enlargement of the exposure stage 84 while maintaining the required minimum length.

Next, the printing process in step 246 in FIG. 6 will be described with reference to the flowchart in FIG. 7. In step 250, the image recorded on the negative film 92 is first exposed by the loading process in the exposure stage 86.
The photographic printing paper 22 positioned at is printed. That is, the negative carrier 90 is actuated to position the image to be printed recorded on the negative film 92 at the printing position, the black shutter 104 is opened, and each CC filter of the filter unit 98 is set so as to have a predetermined exposure condition. Drive
The light emitted from the light source 96 and transmitted through the negative film 92 is imaged on the photographic printing paper 22. As a result, the positioned image is printed on the photographic printing paper 22.

At the next step 252, the feed roller 7
2. The main feed roller 114 is rotated at the same rotation speed, the photographic printing paper 22 is conveyed by a certain distance corresponding to the size of the printed print, and then the driving of the delivery roller 72 and the main feed roller 114 is stopped.

Then, steps 254, 256 and 258.
Then, the delivery roller 72 is reversely rotated for a predetermined period of time to apply a predetermined tension to the photographic printing paper 22 on the exposure stage 86.

In step 260, a predetermined number of images are printed and it is determined whether or not the printing process is completed. If the determination in step 260 is negative, step 2
Move to 62. Here, when the feed roller 72 and the main feed roller 114 are driven, the printing paper 22 is pulled out from the loop 70, and the size of the loop 70 gradually decreases. In step 262, it is determined whether or not the size of the loop 70 has become equal to or smaller than a predetermined value.

When the loop sensor 68 is turned off, the affirmative determination is made in step 252, and the feed roller pair 28 is rotated in step 264. As a result, the amount of the printing paper 22 stocked in the loop 70 is increased and the loop 70 is enlarged. When the loop 70 reaches a predetermined size, the determination in step 262 is denied and the process returns to step 240,
A baking process is performed. If the determination in step 260 is affirmative, the printing process ends.

The loop 130 is formed by the difference between the transport speed of the main feed roller 114 and the transport speed of the feed roller 134. The printer unit 12
The process of transporting the printing paper 22 for one print and printing the image is repeated, but the processor unit 14 transports the printing paper 22 at a constant speed. The difference due to the difference in the transportation method is absorbed by the loop 130.

As described above, in this embodiment, the reverse feed length M and the trial baking are performed so that the length which allows the photographic paper 22 to be stretched between the two pairs of rollers can be secured in the post-process such as the developing process. Since the feed pitch P is set, regardless of the enlargement of the exposed portion,
It is possible to prevent waste of the printing paper 22.

[0076]

As described above, the trial printing control device for a photoprinting apparatus according to the present invention has a minimum required length for carrying over by carrying it over two pairs of carrying rollers in a post-process such as a developing process. It has an excellent effect that the trial baking can be performed and the unused area of the leading end portion of the photosensitive material can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a printer unit of a printer processor according to an embodiment.

FIG. 2 is a schematic configuration diagram of a magazine for accommodating photographic paper and a loading unit.

FIG. 3 is a control block diagram.

FIG. 4 is a schematic diagram showing a photographic printing paper conveyance state during trial printing.

FIG. 5 is a control flowchart showing a front stage of a loading processing routine.

FIG. 6 is a control flowchart showing a latter stage of a loading processing routine.

FIG. 7 is a control flowchart showing a printing process routine.

[Explanation of symbols]

 10 Printer Processor 12 Printer Section (Photo Printing Apparatus) 22 Printing Paper 28 Feed Roller Pair (Conveying Roller) 44 Control Circuit 72 Feeding Roller (Conveying Roller) 114 Main Feed Roller (Conveying Roller) 120 Passage Detection Sensor (Sensor) 120 Cutter Section

Claims (1)

[Claims] 1. A printing apparatus, which extracts a photosensitive material from a magazine containing a long photosensitive material, and prints an image in a state where the photosensitive material is positioned at a printing position of an exposure section, wherein the printing process is performed. N (n ≧ 2) with intermittent feed before
A trial printing control device for a photographic printing apparatus for performing a trial printing of a number of times to set exposure conditions, wherein a pair of transport rollers provided in the vicinity of the downstream side of the exposure section, and a further downstream side of the transport rollers. A sensor that is provided to detect the presence or absence of the photosensitive material, a cutter unit that is provided at a position of a length K from the optical axis of the exposure unit and that cuts the photosensitive material based on the detection result of the sensor, and the sensor When the leading edge of the photosensitive material is detected, the conveying roller is reversed to rewind the photosensitive material by the length M, and the trial baking is started based on the position rewound by the reverse feeding control means. In addition, the conveyance control means intermittently conveys the photosensitive material at the trial print feed pitch P, and the length from the leading edge of the photosensitive material of the region of the photosensitive material on which the trial baking is performed at the end of the trial baking is performed in a post process such as a developing process. The number of trial bakings n, the length M, and the pitch P are set to K−M + {P / 2 + (n−1) × P} ≧ L so that the length L is enough to be passed over between the pair of rollers and fed. ... A trial printing control apparatus for a photo printing apparatus, comprising: setting means for setting so that (1) is established.