JPH0258613B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for conveying a long photographic material, particularly a long print paper during exposure printing.

[Conventional technology]

Generally, when exposing and printing (hereinafter sometimes simply referred to as "printing") a long print paper (hereinafter referred to simply as "paper"), after each exposure printing, For borderless, print size (print size)
The printing paper is automatically conveyed by a distance approximately the same as the printing size, or a distance longer than the printing size in the case of width borders, but during this continuous printing operation, the printing size may sometimes need to be changed depending on the customer's request. In this case, there were problems as explained with reference to FIGS. 1 to 3.

[Problem that the invention seeks to solve]

That is, as shown in FIG. 1, a paper mask (hereinafter referred to as
(This is sometimes simply referred to as a "mask.") When printing is performed on an unexposed paper portion A with a length corresponding to the length a of the exposure opening 3 between 2 and 2, the paper on the advancing direction side of paper 1 A punch hole for indicating the cut position is automatically punched by the punch 4 disposed near the mask 2, and then the first punch hole is punched for the length a or a slightly longer distance as described above.
The unexposed paper portion B is automatically conveyed to the left in the figure, and as shown in FIG. Stops until exposure printing.

In addition, when changing the printing size from a to b (a>b), first punch holes for indicating the cut position are punched in the rear end 5 of the paper part A in FIG. 3, and then the mask 2, 2 to the state shown in Figure 3, changed the printing size, and performed exposure printing, so the printing was not done on the paper length c part, but only on the paper part C. After a punch hole for indicating the cutting position is punched at a position 6 slightly forward of the tip of the paper section C, the paper section C is automatically conveyed by a length b. Therefore, there is a drawback that paper loss occurs. Conversely, when changing the printing size from b to a (a>b), in order to avoid some duplication of exposure and printing, although it is inconvenient,
It was common practice to make fine adjustments manually.

[Means to solve the problem]

In view of the current situation, the present invention aims at changing the exposure and printing size during conveyance of a long photographic material loaded in a printer, in which exposure printing is performed when the conveyance of the long photographic material loaded in a printer is stopped intermittently along its longitudinal direction. In this case, after the exposure printing before changing the exposure printing size, without immediately transporting the long photosensitive material, a pair of paper mask pieces that determine the exposure printing size are aligned with the optical axis for exposure printing. The exposure and printing size is changed by moving the long photosensitive material by a distance of D-α/2=(L-a/2)-α/2 in the transport direction to change the exposure and printing size. A punch hole for indicating the cut position is provided at the rear, and the machine is further transported by (a+b)/2-(D-α/2)+α = (a+b/2)-(L-3α/2) for exposure printing. The present invention has made it possible to provide a method for transporting a long photographic material, which is characterized by the following.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to the drawings from FIG. 4 onwards, which illustrate each embodiment of the present invention. First, in FIGS. 4 to 7 showing one embodiment of the present invention, 1' is a long piece of paper;
2', 2' are masks, and 4' is a distance L from the center of the exposure opening 3' between the masks 2', 2' in the transport direction of the paper 1', as the masks 2', 2' move. This is a punch for attaching a cut position indicator that is installed so that the cut position does not change.

In FIG. 4, of the long paper 1', a paper portion A' having a length a located at the exposure opening 3' between the masks 2' and 2' is a paper that has been exposed and printed. , after exposure and printing, it is not transported immediately but remains at the exposure and printing position until the next exposure switch is turned on. If you turn on the exposure switch in this state without changing the printing size, it will be transported to the left by D = (L-a/2) (D < a), stopped at that position, and punched by punch 4'. A punch hole is drilled at the tip of the paper section A' as a mark for indicating the cut position, and then the remaining portion (a-D) is automatically conveyed to the left, stopped at that position, and then transferred to the fifth section. As shown in the figure, the unexposed paper portion B' becomes ready for exposure printing, and the series of operations is completed when printing is performed.

When changing the printing size from the state shown in FIG. 5, the masks 2', 2' are first moved without transporting the paper 1'. At this time, the masks 2', 2' are moved symmetrically with the same length around the exposure optical axis (the center of the exposure aperture 3'), and as shown in FIG. is taken as b.

Following this, when the exposure switch is turned on, paper 1' is conveyed to the left by D=(L-a/2), a punch hole is punched at the tip of paper part B', and then (a+b /2-L) [Since the required total transport amount is a/2+b/2,
{a/2+b/2-(L-a/2)}=(a+b/2
-L) only need to be transported. ], exposure opening 3'
The unexposed paper portion C' that has reached this point is exposed and printed, and the series of operations is completed. In this way, since the paper 1' is transported by a predetermined amount and exposed and printed after changing the printing size, there is no loss of the paper 1', and there is no need for any fine adjustment after the paper 1' is transported.

Also, when changing the printing size, mask 2',
Factors such as the position and change amount of the opening side end of 2' are measured as necessary, and using these factors, the conveyance amount is calculated by a computer, etc., and the paper conveyance drive unit (pulse motor, etc.) is controlled. If controlled, it becomes possible to automatically and accurately transport it to a predetermined position.

Next, in FIGS. 8 to 11 which are other embodiments of the present invention, 1" is a long paper, 2",
2'' is a mask, and 4'' is a punch disposed at the opening side end of the mask 2'' on the advancing direction side of the paper 1''.

First, in FIG. 8, a paper portion of length a located in the exposure opening 3'' between the masks 2'', 2''
A'' is a paper that has been exposed and printed, and as in Figure 4, after exposure and printing, it is not transported but is stopped at the exposure and printing position.In this state, the paper is exposed without changing the printing size. If you turn on the switch, the paper part in Figure 8
A punch hole is automatically punched at the tip of A'', and the unexposed light is automatically conveyed to the left by a length a, and the unexposed light reaches the exposure opening 3'' of the mask 2'', 2''. The series of operations is completed when exposure printing is performed on the paper section B''.

When changing the printing size from the state shown in Fig. 9, first punch a hole in the tip of paper part B'' at that position without transporting paper 1'', and then to change the length of the exposure opening 3'' from a to b as shown in FIG. 10. Next, when the exposure switch is turned on, the punch hole is not punched (a/2+b/2). The unexposed paper portion C'' that has reached the position of the exposure opening 3'' between the masks 2'' and 2'' is exposed and printed, and the series of operations is completed. , it is possible to obtain the same effect as in the above-mentioned embodiment with only one conveyance.

In each of the above-mentioned embodiments, the conveyance was described in the case of a borderless case in which both ends of the exposed and printed screen were in close contact with each other, but it is also possible to convey the screen by a distance α slightly longer than this to create a with-border image.
That is, to explain this case in more detail, when the printing size is changed when the punch 4' is located at a distance D from the edge of the exposure opening 3 as shown in FIGS. 4 to 7. To do this, first move the masks 2' and 2' to set the length of the opening 3' to b as shown in Fig. 6, then turn on the exposure switch and move the paper 1' to the left by D-α/2. =(L-a/2)
-α/2 is conveyed, a punch hole is punched at the tip of the paper part B', and further leftward (a+b)/
2-(D-α/2)+α=(a+b/2)-(L-
3α/2).

In addition, when D=0 as shown in FIGS. 8 to 10, it is sufficient to transport the paper once by (a+b)/2+α in the left direction. Here, α is the length of the border portion. In addition, in the above-mentioned transport amount, if α=0, it goes without saying that the transport amount is the transport amount in the borderless case.

Further, the punch hole in each embodiment may be a mark indicating the cut position, and may be printed by an appropriate means. Note that if the printing size is not changed, the print paper may be sent immediately after printing as in the conventional case, and it may be sent only when the printing size is changed as in the embodiment.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the long photographic material is not transported immediately after exposure and printing, but after the printing size is changed, it is transported by a predetermined amount according to the size before and after the change, and exposed. By having a droplet for printing, there is no loss of long photosensitive materials, and the printing size can be changed without the need for fine adjustments after conveyance, especially when changing the size. By measuring the factor, calculating the amount to be transported using a computer, etc., and controlling the transport drive unit, it is possible to automatically and accurately transport it to a predetermined position. It can exhibit excellent effects.

[Brief explanation of drawings]

1 to 3 are explanatory diagrams showing a conventional transport method during exposure and printing, FIGS. 4 to 7 are explanatory diagrams showing an embodiment of the transport method during exposure and printing in the present invention, and FIG. 11 through 11 are explanatory diagrams showing other embodiments of the present invention. 1, 1', 1'': Print paper, 2, 2',
2″: Paper mask, 3, 3′, 3″: Exposure opening, 4, 4′, 4″: Punch.

Claims (1)

[Claims] 1. A long photosensitive material loaded in a printer,
When changing the exposure printing size during transportation of a long photographic material that undergoes exposure printing during intermittent stops of transportation along its longitudinal direction, immediately after the exposure printing before changing the exposure printing size, Without transporting the photosensitive material, the exposure and print size is changed by moving a pair of paper mask pieces that determine the exposure and print size by the same distance with respect to the optical axis for exposure and print, and then the elongated photosensitive material is transferred. , in the transport direction by D-α/2=(L-a/2)-α/2, punch holes for indicating the cut position behind the exposure and printing position, and then (a+b)/2-( A method for conveying a photographic material, characterized in that the photographic material is conveyed by D-α/2)+α=(a+b/2)-(L-3α/2) for exposure and printing. However, D: Distance between the edge of the exposure aperture and the punch L: Distance between the center of the exposure aperture and the punch a: Length of the exposure aperture before size change b: Length of the exposure aperture after size change α: Length of the border portion.