JPH04179546A - Plate making method and apparatus - Google Patents

Abstract

PURPOSE:To automatically make a plate having a definite dimension from the image of a manuscript by comparing the dimension of the manuscript with a stored predetermined dimension to change the magnification of the image. CONSTITUTION:A manuscript 57 is fed by a pair of manuscript feed rollers 40, 41 and the end margin thereof on the downstream side is detected by photointerruptors 38, 39 and, when a predetermined time is elapsed, the manuscript reading operation due to a line sensor 37 is started and completed at the point of time when the manuscript is perfectly moved from the part above the line sensor 37 in the downstream direction. The end parts of the manuscript on the upstream and downstream sides are detected by the photointerruptors 38, 39 and, by measuring the time of a detection interval, the dimension of the manuscript 57 is detected. The image signal of the manuscript 57 from a manuscript reader 36 is once stored in a memory 54 and subsequently changed in magnification according to circumstances and further amplified to be outputted to perform plate making on thermal stencil paper 8 by a thermal head 10.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to a method and apparatus for making a plate of a calligraphy image on a printing base paper based on a manuscript on which a calligraphy image to be printed is formed, and particularly relates to a method and an apparatus for making a plate of a calligraphy image on a printing base paper. It is possible to automatically change the magnification of a document image.

(b) Conventional technology Plate-making methods and plate-making devices that are equipped with a variable-magnification process and variable-magnification means are well known, but conventional methods and devices are configured to vary the magnification according to instructions from the operator. has been
There was no one that was configured to automatically change the magnification to a certain size and make a plate.

(c) Problems to be Solved by the Invention As mentioned above, in the prior art, there is no structure in which a manuscript image is automatically scaled to a certain size and made into a plate.

On the other hand, in recent years, in view of the danger of depletion of wood resources, there has been a growing tendency to use paper that is numerically smaller. This has the disadvantage that it is difficult to create.

Therefore, when creating a manuscript image, it is necessary to make it relatively large.
A calligraphic image is appropriately created on a manuscript of a size that is easy to create, and the manuscript is reduced to a desired size using a copying machine or the like to make a plate.

In addition, by uniformly printing existing manuscripts of various sizes on, for example, Japanese Industrial Standards A4 size (hereinafter abbreviated as A4 size) and aligning the printed matter, filing will be easier. Although it is easier and the time and effort of paper folding can be saved, it was not possible to unify the paper automatically in the past.

Furthermore, since the created manuscript is once copied and then plate-made, the resolution is undeniably lowered, and the work becomes complicated.

(d) Means for Solving the Problems The first main invention is a dimension detection step of detecting the dimensions of the manuscript in a plate-making method for reading a manuscript on which a calligraphy image is formed and making a plate of the manuscript image on printing base paper. and a comparison step of comparing whether or not the dimension detected by the dimension detection step is larger than a predetermined dimension, and if the detected dimension of the document is larger than the predetermined dimension, the document is This method is characterized by comprising a scaling step of reducing the size, and a plate-making step of making a printing base paper from the calligraphy image reduced by the scaling step.

The second main invention is a plate-making apparatus that is equipped with a document reading means for reading a document image formed on a document, and a plate-making means for making a plate from the document image read by the document reading means into a printing base paper. , a document reading means for optically reading a document image by relatively scanning the document; a document size detecting means for detecting the dimensions of the document by relatively scanning the document; and a predetermined size is stored. a memory, and a size comparing means for comparing the original size detected by the original size detecting means and a predetermined size stored in the memory;
A document image scaling device for changing the size of the document image read by the document reading device, and a plate making device for making a plate from the document image into a printing base paper, the document size detected by the document size detecting device being a predetermined size. If the original size is larger than the original size, the original document is reduced to a predetermined size and made into a plate.

Note that in the present invention, the manuscript refers to the entire sheet of paper on which a manuscript image is written.

(e) Operation In the first main invention, it is determined whether the detected size of the original paper is larger than a predetermined size, and if the detected size of the original is larger than the predetermined size, The original document is reduced to a predetermined size and the calligraphic image is made into a printing base paper.

In addition, if the dimensions of the manuscript are the same as or smaller than the prescribed dimensions, the manuscript may be made into plates at the original dimensions, and if the dimensions of the manuscript are smaller than the prescribed dimensions, It is also possible to enlarge the original to a predetermined size and make a plate.

The operation of the second main invention is substantially the same as that of the first main invention.

(f) Example drawings show a plate-making printing apparatus embodying the present invention,
Fig. 1 is an internal configuration diagram of the prepress printing device, Fig. 2 is an external perspective view of the prepress printing device, Fig. 3 is a block diagram, Fig. 4 is a flowchart, and Fig. 5 is the dimensions of the manuscript and the base paper after plate making. FIG. 3 is a plan view showing the relationship.

First, the overall structure of the exposing plate making printing apparatus will be explained with reference to FIGS. 1 and 2. Reference numeral 1 denotes a main body of the device, into which a pair of support shafts 2 whose ends face each other are inserted into and removed from each other in the horizontal direction, into a cylindrical body having a shape similar to that of the support shafts 2. A plate cylinder 3 is rotatably mounted. The plate cylinder 3 is rotated by being kicked by a pin on the front side, and is rotatably mounted on a fixed support shaft 2 on the back side, and a drive motor 4 rotates the cylinder clockwise. is connected to the timing belt 5 via a timing belt 5.

A speed control circuit 6 is connected to the drive motor 4 to control its rotation speed.

The plate cylinder 3 is made of a base made of metal or plastic formed into a net shape with many small holes perforated in the peripheral side wall, and silk, cotton, synthetic fiber, etc. wrapped around the outer peripheral surface of the base. It is composed of a formed cloth screen.

A reel 7 is rotatably mounted on the upper left side of the apparatus main body 1, and a band-shaped heat-sensitive stencil paper 8 is wound around the reel 7 in a roll shape. This heat-sensitive stencil paper 8 is a well-known material in which a heat-shrinkable film and a porous thin film are laminated.

On the downstream side of the reel 7 along the moving direction of the heat-sensitive stencil paper 8 (rightward in FIG. 1), there is a tension roller 9.
is rotatably provided further downstream of the tension roller 9 in a direction parallel to the extending direction of the support shaft 2 of the plate cylinder 3 for punching and forming a desired calligraphic image on the heat-sensitive stencil paper 8. A thermal head 10 is provided that extends from below, and a platen roller 11 is lightly pressed against the thermal head 7 from below.

On the downstream side of the thermal head 10, a heat-sensitive stencil paper 8 is provided.
a predetermined length dimension (e.g. lengthwise dimension of A4 size)
A cutter device 13 having a rotary circular blade 12 for cutting is provided, and downstream of the cutter device 13 there is provided a pair of paper transport rollers 14, 15 which are pressed against each other.

On the downstream side of the pair of paper transport rollers 14.15, the downstream edge of the thermal stencil paper 8 is transported to a clamping position of a clamper 16 that is swingably mounted on the non-printing area of the plate cylinder 3. A base paper supply roller 17 for this purpose is pressed onto a sliding plate 18.

A paper feed tray 20 whose protruding end is swingably engaged with the holding shaft 19 is provided at the lower right of the apparatus main body 1. An arc-shaped side wall 22 corresponding to the swing locus of the free end of the paper feed tray 20 is formed on the side of the apparatus main body 1 facing the downstream edge (along the feeding direction). Reference numeral 23 denotes a side guide plate that guides the sides of the unprinted printing paper 21 stacked on the paper feed tray 20.

Note that, as a substitute for the paper feed tray 20, a paper feed cassette loaded with unprinted printing paper 21 may be configured to be detachably attached to the main body 1 of the apparatus.

At the upper part of the side wall 22, there is provided a structure for separating the unprinted printing paper 21 stacked on the paper feed table 20 one by one and feeding it toward the printing section (lower part of the plate cylinder 3). A paper feed roller 24 is provided on the downstream side (left side) of the paper feed roller 24, and after the printing paper 21 fed by the paper feed roller 24 is temporarily stopped, a timing check is performed. Pair of register rollers for metering and refeeding 25.
26 are pressed together.

On the downstream side of the register roller pair 25, 26, the printing paper 21 fed by the register roller pair 21, 22 is placed in the lower part of the plate cylinder 3 in the printing area of the plate cylinder 3 (the roll of thermal stencil paper 8). A pressure roller 27 is provided for pressing against the contact area). The pressure roller 27 is driven by the plate cylinder 3 and is pressed against only the printing area in synchronization with the rotation of the plate cylinder 3, that is, the clamper 16 provided in the non-printing area of the plate cylinder 3. It is provided so as to be able to approach and separate from the plate cylinder 3 so as not to come into contact with the plate cylinder 3, etc.

Diagonally above the pressure roller 27 on the downstream side, there is a separation belt (not shown) for separating the printed printing paper 21 from the plate cylinder 3, and a separation belt (not shown) for separating the printed printing paper 21 from the plate cylinder 3, and a belt for separating air between the plate cylinder 3 and the printed printing paper 21. A separation fan 28 is provided to facilitate separation of the printing paper 21 from the plate cylinder 3 by force feeding.

Further, on the downstream side of the pressure roller 27 and diagonally below, a paper ejection tray 29 for loading and holding printed printing paper 214 separated from the plate cylinder 3 is attached to a support shaft 30 fixed to the main body 1 of the apparatus. It is mounted so that it can swing. A side guide plate 31 and an end guide plate 32 for regulating the three outer sides of the printing paper 21 are respectively attached to the paper discharge tray 29 so as to be able to be closed inside.

The end guide plate 32 is configured to be extendable and retractable so that the paper output tray 29 can be stored upright in the main body of the apparatus. It is folded into the state shown by the two-dot chain line.

Above the paper feed roller 24, there are a pair of plate discharge rollers 32, 33 and a plate discharge box 34 for separating and storing thermal stencil paper 8, which is no longer needed after printing a predetermined number of sheets, from the plate cylinder 3. is provided. Said plate discharge roller pair 3
Of 2.33, the movable roller 32 is attached to the free end of the swing lever 35, and when the movable roller 32 starts to peel off the downstream edge of the thermal stencil paper 8 from the plate cylinder 3, It is configured to be pressed against the plate cylinder 3 (heat-sensitive stencil paper 8), and after the start of peeling, to be pressed against a fixed roller 33. Therefore, after the peeling is started, the heat-sensitive stencil paper 8 is pinched by the pair of plate discharge rollers 32 and 33, and is sequentially stored in the plate discharge box 34.

The plate discharge box 34 is attached to the apparatus main body 1 so as to be horizontally removable, and when the plate discharge box 34 is full of used thermal stencil paper 8, the plate discharge box 34 is removed from the apparatus main body 1. By removing it horizontally, the unnecessary used heat-sensitive stencil paper 8 can be easily disposed of.

A document reading device 36 is provided above the plate discharge box 34 for reading a calligraphic image formed on the lower surface of the document and converting it into an electrical signal. The document reading device 36 has a built-in contact type line sensor 37 that reads the written image of the document, and a transmission type line sensor 37 is installed upstream (on the right side) of the line sensor 37 to detect the downstream edge of the document. Photo interrupters 38, 39 are provided. Furthermore, a pair of document feeding rollers 40, 41 are arranged in pressure contact with each other further upstream of the seven-way interrupter 38, 39.

A pair of document feed rollers 42.43 as a pair of document register rollers is provided upstream of the pair of document feed rollers 40.41, and a document start roller 44 is provided further upstream of the pair of document feed rollers 42.43. and a document supply table 45.

On the downstream side (left side) of the line sensor 37, a pair of document discharge rollers 46, 47 is provided, and further downstream of the pair of document discharge rollers 46, 47, the top cover 48 of the main body 1 of the apparatus is located. A recess 49 is formed in the upper surface of the top cover 48. The original 57 after the document image has been read is discharged into the recess 49 on the upper surface of the top cover 48 .

Thus, the original 57 fed from the original feeding table 45
First, the document starting roller 44 and the document supply roller pair 4
2.43, and then the document feed roller pair 40.
41, and sequentially fed to the left. and,
Its downstream edge is detected by the 7-way interrupter 38, 39, and when a predetermined period of time has elapsed, the line sensor 37
The document reading operation starts. After the upstream edge of the document is detected by the photointerrupter 38, 39, a predetermined period of time elapses, and the document is detected by the line sensor 38.
The document reading operation is controlled to end when the document has completely moved downstream from the top.

Note that the upstream end and downstream end of the original 57 are detected by the photointerrupters 38 and 39, and the dimensions of the original 57 are detected by measuring the detection interval.

The document image signal of the original 57 from the original reading device 36 is first stored in the memory 54 (FIG. 3), then scaled depending on the case, further amplified, and outputted to the thermal head 10. After the written image of the original 57 is read by the line sensor 37, it is stored in the memory 54 (FIG. 3), and then transferred to the thermal head 1.
The thermal stencil paper 8 is made by 0.

Note that it is also possible to detect the dimensions of the original 57 by reading the width of the original 57 near the downstream end edge using the line sensor 37 . In such a case, the dimensions of the document 57 are detected at the same time that the downstream edge of the document 57 reaches the position corresponding to the line sensor 37 . Therefore, since the magnification is changed and the plate is made in real time, in such a case, after the document image of the document 57 is read by the line sensor 37, it is not stored in the memory 54, but is immediately transferred to the thermal head 10. The heat-sensitive stencil paper 8 is made by the following steps.

The document 57 after the document image has been read in this manner is squeezed by the pair of document discharge rollers 46 and 47 and discharged onto the concave surface 49 of the top cover 48 .

Note that the operation panel 50 of the apparatus main body 1 is equipped with a plate-making start switch 51 (see FIGS. 2 and 3). The prepress start switch 51, the original reading device 36, the thermal head 10, and various memories 53 and 54 are connected to the CPU 56 via a pass line 55.

When the original 57 to be plated (printed) is supplied, the dimensions of the original 57 are detected by the photo interrupter 38, 39, etc. as described above, and the original 57 is
If it is determined that the size of the document 7a (see FIG. 5) is larger than the predetermined size (A4 size in this embodiment), the document 57
A is reduced to A4 size and made into a thermal stencil paper 8 by the thermal head 10.

Further, if it is determined that the dimensions of the original document 57 are the same as A4 size, the original dimensions are made into the thermal stencil paper 8 without changing the original dimensions.

Further, if it is determined that the size of the original document 57b (see FIG. 5) is smaller than A4 size, it is enlarged to A4 size and made into thermal stencil paper 8.

Note that the function of enlarging the document 57 when its size is smaller than A4 size is not necessarily necessary.

(g) Effects of the Invention In both inventions, it is determined whether the detected dimensions of the original are larger than a predetermined size, and if the detected dimensions of the original are larger than the predetermined size, The original is reduced to a predetermined size and the calligraphic image is made into a printing base paper, so even if the size of the original is large, the original is always made into a prepress of the predetermined size and printed on printing paper with a predetermined size. That will happen.

Therefore, a decrease in resolution, which is caused by making a plate after a created original is once copied, as in the prior art, is prevented.

Furthermore, since there is no need to once copy the created manuscript using a copying machine, the plate-making work is streamlined.

[Brief explanation of drawings]

The drawings show a plate-making printing device embodying the present invention.
Fig. 1 is an internal configuration diagram of the prepress printing device, Fig. 2 is an external perspective view of the prepress printing device, Fig. 3 is a block diagram, Fig. 4 is a flowchart, and Fig. 5 is the dimensions of the manuscript and the base paper after plate making. FIG. 3 is a plan view showing the relationship. DESCRIPTION OF SYMBOLS 1... Apparatus body, 3... Plate cylinder, 8... Heat-sensitive stencil paper, 10... Thermal head, 11... Platen roller, 13... Cutter device, 14.15... Base paper Transfer roller pair, 16... Clamper, 17... Base paper supply roller, 20... Paper feed table, 21... Printing paper, 36
. . . Original reading device, 37 . . . Line sensor, 38.
39...Photo interrupter, 50...Operation (flannel), 51...Prepress start switch, 53.54...Memory, 56...CPU, 57.57a, 57b・
...Manuscript.

Claims (1)

[Claims] 1. In a plate-making method for reading a manuscript on which a calligraphy image is formed and making a plate for printing the document image, a dimension detection step for detecting the dimensions of the manuscript; a comparison step of comparing whether the dimensions are larger than a predetermined size; a scaling step of reducing the document to a predetermined size if the detected dimensions of the document are larger than the predetermined size; A plate-making method characterized by comprising a plate-making process in which a calligraphy image reduced by a scaling process is made into printing base paper. 2. The plate making method according to claim 1, wherein when the detected size of the original is the same as a predetermined size or smaller than a predetermined size, the original is made into a plate at its original size. 3. The plate-making method according to claim 1, wherein when the detected size of the original is smaller than a predetermined size, the original is enlarged to a predetermined size in the magnification changing step. 4.Claim 1 that the predetermined dimension is No. 4 in column A of the Japanese Industrial Standards.
The plate-making method according to any one of claims 1 to 3. 5. In a plate-making device that is equipped with a manuscript reading means for reading a manuscript image formed on a manuscript and a plate-making means for making a printing base paper from the calligraphy image read by the manuscript reading means, the manuscript is relatively a document reading device that optically reads a document image by scanning; a document size detection device that detects the dimensions of the document by relatively scanning the document; a memory that stores predetermined dimensions; size comparison means for comparing the original size detected by the detection means with a predetermined size stored in a memory; a document image scaling means for changing the size of the document image read by the document reading means; and printing the document image. and plate-making means for making a plate on a base paper, and is configured to reduce the document to a predetermined size and make a plate when the document size detected by the document size detection means is larger than a predetermined size. A plate-making device characterized by: 6. The plate making apparatus according to claim 5, wherein when the detected size of the original is the same as a predetermined size or smaller than a predetermined size, the plate is made with the original size. 7. The plate-making apparatus according to claim 5, wherein when the detected size of the original is smaller than a predetermined size, the magnification change means enlarges the original to a predetermined size and makes the plate. 8.Claim 5 that the predetermined dimension is No. 4 in column A of the Japanese Industrial Standards.
The plate making apparatus according to any one of claims 1 to 7.