JP3535599B2 - Plate making and printing equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate-making printing apparatus for forming a surface image on a master by using a thermal head or the like with a perforated image and a thermal transfer film, and more particularly to a two-color printing. Stencil printing device.

[0002]

2. Description of the Related Art Two-color printing with a plate-making printing apparatus has been performed as follows. First, an original is placed in a memory by arranging a color filter in the original reading unit or a color filter in front of a monochrome CCD as described in JP-A-64-18682, reading each color. Next, a punched image is formed on the master according to the image signal of one color read by the color CCD, and the first color is printed. afterwards,
Dry the ink on the first color print. The drum unit used for printing the first color is replaced with another drum unit, a punched image is formed on the master according to the image signal of the next color, and the other color is superimposed on the printed matter of the first color for printing.

[0003]

The above technique has the following problems. Drum units and masters are required for each color, increasing costs and securing a storage place for the drum units. If the ink of the printed matter of the first color is not dried, the next color cannot be printed, and plate making and printing are performed for each color, which takes time. The drum unit must be replaced, and when the drum unit is replaced, ink easily adheres to the operator's hands and clothes, and the workability is poor. It is difficult to align the print image of the first color and the print image of the second color, and the test printing must be repeated many times.

The present invention has been made in order to solve the above-mentioned problems, and it is low in cost, short in printing time, does not require a storage place for a drum unit, has good workability, and has the first and second colors. The present invention provides a plate-making / printing apparatus capable of obtaining a printed matter in which the print image is not displaced.

[0005]

The invention according to claim 1 is
In a plate-making printing apparatus for winding the master made by plate winding on the outer peripheral surface of the plate cylinder, supplying ink to the master, pressing the printing paper to the master and transferring the ink from the master to the printing paper to print. 2 color originals for each color
A document reading section for reading as one image information, a first plate making means for forming a punched image according to the first image information on the master, and a surface image according to the second image information for the master. 2 plate making means, a first ink supplying means for supplying ink to the perforated image from the inner peripheral surface of the plate cylinder, and a second ink supplying means for supplying ink to the surface image formed on the master. And is wound around the outer peripheral surface of the plate cylinder with the surface image of the master outside.

According to a second aspect of the present invention, in the stencil printing plate making apparatus according to the first aspect, the surface image is a convex image formed on the surface of the master by using a thermal transfer film.

[0007]

According to the present invention, the master having the punched image corresponding to one color of the two-color original and the surface image corresponding to the other color is wound around the outer peripheral surface of the plate cylinder, The ink of one color is supplied to the perforated image from the inner peripheral surface of the ink by the first ink supply means, the ink of the other color is supplied to the surface image by the second ink supply means, and the printing paper is pressed against it. Color printing is done at once.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 indicates a plate-making printing apparatus. The plate-making printing apparatus 1 mainly includes a printing unit 2, a plate-making unit 3, a paper feeding unit 4, a plate discharging unit 5, and a paper discharging unit 6.

The printing section 2 is mainly composed of a plate cylinder 7, a first ink supply means 8, a second ink supply means 28, and a press roller 9.

The plate cylinder 7 is formed of a porous thin plate in a cylindrical shape, and is driven to rotate about a support shaft described later by a plate cylinder driving means (not shown). On the outer peripheral surface of the plate cylinder 7, 1 to 3 layers of a mesh screen (not shown) woven with fine wires of polyester or stainless are wound.

Further, on the outer peripheral surface of the plate cylinder 7, a stage portion 10 extending in the same direction as the axis of the plate cylinder 7, and a stage portion 10 are provided.
At the same time, a clamper 11 that holds the tip of the master is provided. The clamper 11 is rotatably supported by the support shaft 11 a and is provided so as to come in contact with and separate from the stage unit 10.
The clamper 11 is rotated by an opening / closing means (not shown) to contact the stage portion 10 and the stage portion 10.
It is swung selectively to a position further apart.

Inside the plate cylinder 7, a first ink supply means 8 is arranged. The first ink supply means 8 is mainly composed of an ink supply pipe 12, a first ink roller 13, and a first doctor roller 14.

An ink supply pipe 12 also serving as a support shaft for the plate cylinder 7 is fixed to a housing side plate (not shown) of the plate making / printing apparatus 1 and has a surface for supplying ink to the inside of the plate cylinder 7. Innumerable small holes are drilled. Below the ink supply pipe 12, a first ink roller 13 and a first doctor roller 14 are arranged. The first ink roller 13 rotatably supported by a side plate (not shown) of the plate cylinder 7 has its outer peripheral surface abutted against the inner peripheral surface of the plate cylinder 7, so that the ink supplied from the ink supply pipe 12 is Supply to the plate cylinder 7. Near the first ink roller 13, a rotatable first doctor roller 14 is arranged.
The first doctor roller 14 is arranged so that a slight gap is formed between the outer peripheral surface of the first doctor roller 14 and the outer peripheral surface of the first ink roller 13, and the first doctor roller 14 is close to the outer peripheral surface of the first ink roller 13. In the portion, a wedge-shaped ink reservoir 15 is formed. The ink supplied from the ink supply pipe 12 to the ink reservoir 15 passes through the gap between the first ink roller 13 and the first doctor roller 14 to form a uniform layer, and the ink of the first ink roller 13 Supplied on the surface.

A second ink supply means 28 is arranged on the right side of the plate cylinder 7. The second ink supply means 28 is
As shown in FIG. 4, the master 2 wound around the outer peripheral surface of the plate cylinder 7
A second ink roller 43 that supplies ink by contacting the second ink roller 43.
And a second doctor roller 44a, 44b for supplying a predetermined amount of ink to the second ink roller 43, and a side plate 46 for rotatably supporting these rollers. The side plate 46 is supported by the support shaft 46a, and is rocked about the support shaft 46a by a rocking means (not shown).
The ink roller 43 of the above is brought into contact with and separated from the plate cylinder 7.

The ink reservoir 45 between the second doctor rollers 44a and 44b is supplied with ink of a color different from the color of the ink supplied to the first ink supply means from an ink pack (not shown).

Below the plate cylinder 7, a rotatable press roller 9 is provided, which is supported by a swinging device (not shown) and whose outer peripheral surface is provided so as to come into contact with and separate from the outer peripheral surface of the plate cylinder 7. ing. The press roller 9 presses the printing paper fed from the paper feeding unit 4 described later against the plate cylinder 7 to form a printing image on the printing paper.

A document reading unit 20 is provided above the printing unit 2 and above the casing to read an image of the two-color document 35 as image information of each color. Document reading unit 20
Is mainly composed of an ADF unit 29, a fluorescent lamp 30, a mirror 31, a lens 32, a color CCD 33 and the like.

The two image information read by the color CCD 33 are input to A / D converters 36 and 37 for each color as shown in FIG. 2, and converted into digital signals by the A / D converters 36 and 37. To be done. The A / D converters 36 and 37 include
A CCD image processing unit 38 for compressing image information is connected, and the compressed image information is input to the control means 80. The control means 80 includes a CPU 51, a ROM 38 and a RAM 3
It is composed of a well-known microcomputer having 9 and 9. The two pieces of image information are stored in the RAM 3 of the control means 80.
9 is stored. Information is input to the CPU 51 from an operation unit 75 for setting various conditions at the time of printing and plate making and various sensors not shown. The sequence of all operations of the plate-making printing apparatus is controlled by the CPU 51.

The ADF unit 29 includes a calling roller 40 for pulling out the original 35 and the lowest one of a plurality of originals.
It is mainly composed of a pair of separation rollers 41 for separating only one sheet, a pair of document conveying rollers 42, a document tray 50 on which a read document is placed, and the like.

A plate making section 3 is arranged on the upper right side of the printing section 2. The plate making unit 3 includes a first plate making unit 17 for forming a punched image on the master 22, a second plate making unit 87 for forming a convex image as a surface image on the master 22 with the thermal transfer film 82, a cutting unit 18, and a conveying roller 19. It is mainly composed of etc.

The master 22 is wound in a roll shape, and its core portion 23 is rotatably supported by the master supporting means 16. As shown in FIG. 3, the master 22 has a laminated structure in which a very thin thermoplastic resin film 22a and a porous layer 22b made by mixing Japanese paper and synthetic fibers are bonded together.

A first plate making means 17 is arranged on the left side of the master supporting means 16. The first plate making means 17 is
First platen roller 24, first thermal head 25
It is mainly composed of etc. First platen roller 24
Is rotationally driven by a stepping motor (not shown). The first thermal head 25 has a large number of heating elements inside, is biased by a biasing means (not shown), and is pressed against the first platen roller 24.

As shown in FIG. 2, a control means 80 is connected to the first thermal head 25 via a thermal head image processing section 48 for expanding image information, and its operation is controlled. As shown in FIG. 3, the first thermal head 25 receives a color CCD in response to a command from the CPU 51.
Based on the first image information read in 33, the master 22
It has a well-known function of selectively melting and perforating the thermoplastic resin film 22a to form a perforated image. In the figure, reference numeral 21 represents perforation.

A second plate making means 87 is disposed downstream of the first plate making means 17 in the master carrying direction. The second plate making means 87 is mainly composed of a second platen roller 84, a second thermal head 85 and the like. The second platen roller 84 is rotationally driven by a stepping motor (not shown). The second thermal head 85 is
It has a large number of heating elements inside, is biased by a biasing means (not shown), and is pressed against the second platen roller 84.

The thermal transfer film 82 is wound in a roll shape and is supported by the shaft 86a so as to be freely drawn out. In the figure, below the shaft 86a, the thermal transfer film 82 fed from the shaft 86a is attached to the second thermal head 85.
A take-up shaft 86b is arranged for taking up after passing through. In the figure, reference numerals 83a and 83b represent idlers that rotate as the thermal transfer film 82 moves.

As shown in FIG. 3, the thermal transfer film 82 is composed of a base film 82b and a transfer layer 82a, and has a characteristic that the transfer layer 82a is separated from the base film 82b when heat is applied from the side of the base film 82b. Have.

As shown in FIG. 2, a control means 80 is connected to the second thermal head 85 via a thermal head image processing section 48 for expanding image information, and its operation is controlled. As shown in FIG. 3, the second thermal head 85 receives a color CC from a command from the CPU 51.
Based on the second image information read in D33, heat is selectively applied from the base film 82b side of the thermal transfer film 82 to transfer the thermal transfer layer 82a and form a convex image on the master 22. In the figure, reference numeral 81 represents a convex portion.

In order to convey the master 22 and the thermal transfer film 82 at the same time and prevent the conveyance failure, the peripheral speeds of the first platen roller 24 and the second platen roller 84 are
Are set equal.

At the downstream side of the second plate-making means 87 in the master-conveying direction, the conveying roller 1 for conveying the plate-made master 22.
9 is arranged, and on the downstream side thereof, a cutting means 1 comprising a fixed blade 18a for cutting the master 22 and a movable blade 18b.
8, and further downstream thereof, a feed roller 26 that feeds the master 22 toward the plate cylinder 7 is arranged.

Below the plate making section 3, a sheet feeding section 4 is arranged. The paper feed unit 4 includes a paper feed tray 52 and a paper feed roller 5.
3, a separating unit 54, a pair of registration rollers 55, and the like.

The paper feed tray 52, on which the printing paper 56 is stacked, is supported by the housing so as to be vertically movable in association with the increase and decrease of the printing paper 56. The paper feed roller 53 is provided so as to come into contact with the uppermost printing paper 56 on the paper feed tray 52, and is rotationally driven by a driving unit (not shown).

The separating means 54 consisting of a driving roller which is rotationally driven by a driving means (not shown) and a separating pad which is fixed to the side plate of the housing so as to come into contact with the driving roller is the driving roller of the sheet feeding tray 52. Top printing paper 56
Is provided so as to abut, and is configured to separate only one of the plurality of printing sheets pulled out by the sheet feeding roller 53.

The pair of registration rollers 55 transfers the printing paper 56 fed from the separating means 54 to the outer peripheral surface of the plate cylinder 7 and the press roller 9 at a timing synchronized with the rotation of the plate cylinder 7 and the swing of the press roller 9. To be delivered in between.

On the left side of the printing section 2, a plate discharging section 5 is arranged. The plate discharge unit 5 is mainly configured by an upper plate discharge member 59, a lower plate discharge member 60, a plate discharge box 61, a compression plate 62, and the like.

The upper plate discharging member 59 is composed of a driving roller 63, a driven roller 64, which is rotationally driven by a driving means (not shown), and a rubber belt 65 which is stretched between the rollers. The lower plate discharging member 60 is composed of a driving roller 66 that is connected to a driving roller 63 by a gear (not shown) and is driven to rotate, a driven roller 67, and a rubber belt 68 that is stretched between the rollers. Lower plate discharge member 60
Is provided so as to be movable in the left-right direction around a support shaft of the drive roller 63 by a moving unit (not shown), and the outer peripheral surface of the drive roller 66 can be brought into contact with and separated from the outer peripheral surface of the plate cylinder 7. Is configured.

A plate discharge box 61 for storing a used master inside is provided detachably with respect to the casing.
A compression plate 62 that moves up and down by an elevating means (not shown) is arranged above it.

Below the plate discharge unit 5, a paper discharge unit 6 is arranged. The paper discharge unit 6 mainly includes a peeling claw 69, a driven roller 70, a drive roller 71, a rubber belt 72, a paper discharge tray 74, and the like.

A peeling claw 69 for peeling off the printing paper 56 to which the ink has been transferred from the outer peripheral surface of the plate cylinder 7 is rotatably supported by a housing side plate (not shown), and its tip is against the outer peripheral surface of the plate cylinder 7. It is arranged so that it can be moved in and out freely.

The driven roller 70 and the driving roller 71 are rotatably supported by the housing side plate, and between the rollers,
A rubber belt 72 is stretched around. The driving roller 71 is rotationally driven by a driving unit (not shown), and this rotational force is transmitted to the driven roller 70 via the rubber belt 72.

On the downstream side of the drive roller 71 in the conveying direction of the print paper 56, a paper discharge tray 74 for stacking the print paper 56 on which a print image is formed is arranged. Output tray 74
Is detachably attached to the housing.

The operation of the plate making / printing apparatus 1 will be described below based on the above configuration. For convenience of explanation, it is assumed that the original 35 uses two colors, red and black, black ink is supplied to the first ink supply means 8 and red ink is supplied to the second ink supply means 28. Shall be supplied.

As shown in FIG. 1, after a plurality of originals 35 are set on the original placing portion on the ADF unit 29, the plate making and printing conditions are set by various keys of the operating portion 75 to start the plate making start key. When pressed, the calling roller 40 and the separation roller pair 41 rotate, and only the lowest one original 35 of the plurality of originals 35 is separated and fed to the original conveyance roller pair 42.

Almost at the same time as the above operation, the fluorescent lamp 30 is turned on to illuminate the original 35, and the reflected light is reflected by the mirror 31 and guided to the lens 32, and is incident on the color CCD 33. The image information incident on the color CCD 33 is
Color separation into red and black, A / D converters 36 and 37 for each color
Are each converted to analog / digital. After that, the image information converted into a digital signal is transferred to the CCD image processing unit 38.
Is compressed and stored in the RAM 39. Hereinafter, black image information is referred to as first image information, and red image information is referred to as second image information.

In parallel with the original image reading operation of the original 35 in the original reading section 20, the plate discharge operation for separating the used master from the outer peripheral surface of the plate cylinder 7 is performed. The plate cylinder 7 having the used master wound on the outer peripheral surface thereof starts to rotate in the counterclockwise direction by a driving unit (not shown). Then, when the plate cylinder 7 reaches a predetermined plate discharge position where the rear end of the used master wound around the outer peripheral surface of the plate cylinder 7 corresponds to the drive roller 66, the moving means and drive means (not shown) are actuated to drive the drive roller 66. And the lower plate discharge member 60 is rotated.
Move to the side. When the outer peripheral surface of the drive roller 66 comes into contact with the used master on the outer peripheral surface of the plate cylinder 7, the plate cylinder 7 continues to rotate in the counterclockwise direction and comes into contact with the drive roller 66 and is scooped up. The completed master is sandwiched between the lower plate discharging member 60 and the upper plate discharging member 59, and peeled off from the outer peripheral surface of the plate cylinder 7. The peeled used master is conveyed by the lower plate discharging member 60 and the upper plate discharging member 59 and discarded in the plate discharging box 61, and then compressed by the compression plate 62.

When all the used masters have been peeled off from the outer peripheral surface of the plate cylinder 7, the plate cylinder 7 further rotates and stops at the plate feeding position shown in FIG. When the plate cylinder 7 is stopped at the plate feeding position, an opening / closing means (not shown) is activated to rotate the clamper 11 in the clockwise direction, and the plate cylinder 7 enters the plate feeding standby state shown in FIG. 1 to complete the plate discharging operation.

When the plate discharging operation is completed, the plate making operation is subsequently performed. The first and second platen rollers 24 and 84 of the plate making section 3 are rotationally driven at the same speed by a stepping motor (not shown), and the master 22 and the thermal transfer film 82 are pulled out. Then, when the CPU 51 determines that the image forming area of the master 22 reaches the thermal head 25 based on the number of steps of the stepping motor that drives the first platen roller 24, the CPU 51 stores the first image stored in the RAM 39. The image information is called and expanded by the thermal head image processing unit 48. The first thermal head 25 selectively causes each heating element to generate heat based on the first image information to form a punched image on the master 22, as shown in FIG.

Next, when the CPU 51 determines that the punched image formed on the master 22 has reached the thermal head 85 based on the number of steps of the stepping motor that drives the second platen roller 84, the CPU 51 stores it in the RAM 39. The second image information that has been read is called and expanded by the thermal head image processing unit 48. Second thermal head 8
5 selectively applies heat from the side of the base film 82b of the thermal transfer film 82 based on the second image information, transfers the thermal transfer layer 82a, and forms a convex image on the master 22.
The transferred thermal transfer film 82 is wound on the winding shaft 86b as shown in FIG.

Master 22 on which punched images and convex images are formed
Is transported to the clamper 11 by the transport roller 19 and the delivery roller 26. When the tip of the master 22 reaches a predetermined position between the clamper 11 and the stage unit 10 by the number of steps of the stepping motor that drives the first platen roller 24, an opening / closing means (not shown) is activated to move the clamper 11 counterclockwise. The stage unit 1 is rotated in the rotating direction.
After holding the tip of the master 22 between 0 and the clamper 11,
The plate cylinder 7 starts rotating at a peripheral speed substantially the same as the master transport speed, and the winding of the master 22 around the plate cylinder 7 is started. Here, the master 22 is wound around the outer peripheral surface of the plate cylinder 7 with the convex image on the outside.

When it is judged from the number of steps of the stepping motor which drives the first platen roller 24 that one plate has been completed, the first and second platen rollers 24 and 84, the winding shaft. The rotations of 86b, the conveyance roller 19 and the delivery roller 26 are stopped, and the cutting means 18
The master 22 is disconnected by this. Master 2 disconnected
2 is pulled out by the rotation of the plate cylinder 7, and the winding operation is completed.

Following the winding operation, the printing process is started. After the master 7 is wound on the outer peripheral surface of the plate cylinder 7,
Is rotated in the clockwise direction, and the highest one of the plurality of printing papers 56 stacked on the paper feeding tray 52 is
Only the sheet of printing paper 56 is fed by the paper feed roller 53 and the separating means 54.
And are fed to the registration roller pair 55. The registration roller pair 55 feeds the printing paper 56 between the plate cylinder 7 and the press roller 9 at the timing when the image area of the master 22 wound around the plate cylinder 7 reaches a position corresponding to the press roller 9. .

At this time, as shown in FIG. 4, the first ink roller 13 also rotates in the same direction as the rotation direction of the plate cylinder 7.
The black ink in the ink fountain 15 is the first ink roller 13
When the first ink roller 13 and the first doctor roller 14 rotate, they are attached to the surface of the first ink roller 13 and regulate the amount when passing through the gap between the first ink roller 13 and the first doctor roller 14. It is then supplied to the inner peripheral surface of the plate cylinder 7.

Further, the second ink roller 43 and the second doctor rollers 44a and 44b also start to rotate. The red ink in the ink reservoir 45 is transferred to the second doctor roller 44a,
The amount is regulated between 44b and is attached to the surface of the second ink roller 43.

Simultaneously with the rotation of these rollers, the side plate 46 of the second ink supply means 28 is swung about the support shaft 46a by a swing means (not shown), and the second ink roller 43 is rotated.
Supplies the red ink to the convex portion 81 which comes into contact with the master 22 wound around the plate cylinder 7 and forms a convex image. Master 22
In order to prevent the red ink from being supplied to the background portion other than the convex portion 81, the master 22 is subjected to a desensitizing process.

The fed printing paper 56 is pressed by the press roller 9 against the master 22 wound around the plate cylinder 7. By this pressing operation, the press roller 9 and the printing paper 5
6, the master 22, and the plate cylinder 7 are pressed against each other, so that the black ink is transferred from the perforations 21 of the master 22 and the red ink is transferred to the printing paper 56 from the convex portions 81 of the master 22.

Printing paper 56 to which red and black inks have been transferred
Is peeled off from the outer peripheral surface of the plate cylinder 7 at the tip of the peeling claw 69, falls downward, is attracted to the upper surface of the rubber belt 72, is conveyed to the left, and is discharged onto the paper discharge tray 74. Printing is sequentially and continuously performed by the series of steps described above.

[0056]

According to the present invention, the master on which the punched image corresponding to one color of the two-color original and the surface image corresponding to the other color are formed is wound around the outer peripheral surface of the plate cylinder. From the inner peripheral surface of the plate cylinder, the ink of one color is supplied to the perforated image by the first ink supply means, the ink of the other color is supplied to the surface image by the second ink supply means, and two-color printing is performed once. Low cost, short printing time, no need for drum unit storage space, good workability,
It is possible to obtain a printed matter in which there is no positional deviation between the print images of the first color and the second color.

[Brief description of drawings]

FIG. 1 is a schematic side view of a plate-making printing apparatus adopting an embodiment of the present invention.

FIG. 2 is a block diagram of control means in an embodiment of the present invention.

FIG. 3 is an enlarged sectional view of a main part of the first and second plate making means shown in FIG.

FIG. 4 is a diagram illustrating a printing operation according to an embodiment of the present invention.

[Explanation of symbols]

1 Plate-making printing device 2 Printing department 3 Plate making department 4 Paper feeder 5 Plate ejection section 6 Paper output section 7 plate body 8 First ink supply means 17 First plate making means 20 Original reading section 22 Master 25 thermal head 28 Second Ink Supply Means 35 manuscript 87 Second plate making means

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A 64-18682 (JP, A) JP-A-3-234533 (JP, A) JP-A 50-150505 (JP, A) JP-A 6- 135113 (JP, A) JP 59-111886 (JP, A) JP 55-41224 (JP, A) JP 8-174984 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B41L 13/04 B41L 13/18 B41M 1/12 B41M 1/14 B41C 1/055 511

Claims (2)

(57) [Claims] 1. A plate-making master is wound around an outer peripheral surface of a plate cylinder, ink is supplied to the master, and printing paper is pressed against the master to transfer the ink from the master to the printing paper for printing. In a plate-making printing apparatus, a document reading unit that reads a two-color document as two image information corresponding to each color, a first plate-making unit that forms a perforated image according to the first image information on the master, and the master. Second plate making means for forming a surface image according to the second image information, first ink supplying means for supplying ink from the inner peripheral surface of the plate cylinder to the perforated image, and formed on the master. And a second ink supply means for supplying ink to the surface image, and the surface image of the master is placed outside and wound around the outer peripheral surface of the plate cylinder. 2. The plate-making printing apparatus according to claim 1, wherein the surface image is a convex image formed on the surface of the master by using a thermal transfer film.