JPH01288443A - Picture conveying type printer - Google Patents

Abstract

PURPOSE: To enhance a quality of printing by guiding a printing image transfer element via an operating area of a first drier, forming the element as an endless belt-like printing image collecting element, and disposing a second drier operating at the element at a last printing unit downstream of the printing units. CONSTITUTION: A sheet removed from a sheet feeder 1 is guided to a sheet inserting plate 2 and a sheet delivery unit 3 to a central impression cylinder 4.1. A printing image collecting element 7 is passed through a contact area of a water form roller 40 with an opposed cylinder 15, adhered with a lacquer layer, passed through an operating area of a first drier 37, and the lacquer layer is dried in this case. The element 7 is passed through a printing area between a plate cylinder 9 of a first printing unit and an opposed impression cylinder 12 to receive a printing image of a first ink. The lacquer layer adhered to the element 7 is liquefied by heating it by including the ink by a second drier 38, and hence the lacquer layer is almost completely separated from a rubber cloth. Thus, the ink can be completely transferred, and transferred to the sheet in the case of passing the printing area between the cylinder 4.1 and the element 7.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an image transport printing machine.

[Conventional technology]

The blanket cylinders of each printing section are arranged in a row in contact to transmit ink, and a cylindrical cylinder that also serves as a paper feed cylinder and a turning device for the paper discharge system is pressed against one blanket cylinder. Sheet-fed (-sheet-by-sheet) printing presses are already known (
(See Federal Republic of Germany Patent No. 3203948).

In the case of this known printing press, a number of ink gap locations (Farbspaltstelle) are used for transmitting the printed image.
), and these ink gap areas increase dots, resulting in double printing and a concomitant reduction in quality.

Furthermore, in the case of this known printing machine, since there are more ink gaps than average, it is difficult to adjust the density of the ink layer according to the difference in the ink transport distance until the ink is transferred to the printing material. Have difficulty. Due to the above-mentioned disadvantages, this known printing press cannot be used in modern printing presses having a large number of printing units, for example 10-color printing presses, and furthermore this known printing press has the disadvantage that double-sided printing is not possible. be.

[Problem to be solved by the invention]

The aim of the invention is to improve the printing quality, to simplify the sheet guidance, thereby increasing the print output and expanding the application of image-transport printing presses.

The object of the invention is to create an image-carrying printing press in which images can be transmitted completely.

[Means to solve the problem]

According to the invention, this problem is solved by a printing material supply device, a printing material transport device, a printing material delivery device, at least one plate cylinder with an inking device and a dampening device, a printing material transport device and a printing material cylinder. In such an image-carrying printing machine, the printing material transport device has at least one printed image transfer element in contact with a cylinder which cooperates with a printing material ejecting device and a printing material feeding device. It is designed as a system, in which a counter-impression cylinder is assigned to each forme cylinder, a lacquering device with a first drying device cooperating with the counter-cylinder is arranged upstream of the first printing station, and the printed image-transfer element comprises at least one guided through the printing area between one forme cylinder and at least one counterimpression cylinder, guided through a contact area between the lacquering device and the counterimpression cylinder, and guided through the contact area between the lacquering device and the counterimpression cylinder;
A second drying device is formed as an endless belt-like printed image gathering element which is guided through the active area of the first drying device and comes into contact with the cylinder system, and which acts on the printed image gathering element in the last printing section. This is achieved by being postfixed.

The cylinder system is formed as a sheet guiding central impression cylinder with at least one gripper device or a central sheet guiding impression cylinder with at least one gripper device and this sheet guiding central impression cylinder with at least one gripper device. at least one drum system arranged on the guiding central impression cylinder and forming part of the back-printing device and having at least one back-printing impression cylinder, or formed as a first sheet-guiding central impression cylinder; or at least one drum system having a first web-guiding central impression cylinder and at least one web-guiding back-printing impression cylinder downstream of this web-guiding central impression cylinder and forming part of a back-printing device. It consists of This drum system is designed as a sheet-fed backing cylinder with at least one gripping device or has a sheet-fed backing cylinder with at least one gripping device and at least one gripping device. consisting of a transfer cylinder, or two transfer cylinders optionally designed as a sheet reversing cylinder or a transport cylinder, or alternatively formed as a sheet reversing cylinder or a transport cylinder; It consists of four ferry trunks.

The back printing device is formed as a printing unit consisting of a plate cylinder with an inking device and a dampening device and an offset cylinder in pressure contact with this plate cylinder and the drum system, or alternatively, it has an inking device and a dampening device. Another printing i! having at least one plate cylinder and a counterimpression cylinder in pressure contact with the drum system! It is formed by an i-image cluster assembly element.

At least one plate cylinder having an inking device and a dampening device is arranged above the upper line of the printed image gathering element, or below the bottom line, or alternatively an inking device and a dampening device. 4) At least one plate cylinder with an inking device and a dampening device is arranged above the upper line of the printed image collecting element, and at least one printing plate ih with an inking device and a dampening device is arranged on the T: side of the printed image collecting element. placed below the line.

Mark-1 - The image building element is formed as an endless offset printing "2", or at least one offset printing cloth piece is firmly connected to the printing image 1m building element, or the printing image building element is At least one gripper device for the off+2.1 print cloth piece is fitted.

The lacquering device consists of a lacquer bath, an applicator roller, a 7-car arrangement, and a lacquer source. The first drying device is designed as an initial bomb, and the second drying device is designed as a gonergy dryer.

〔Example〕

The present invention will be described in detail below with reference to embodiments shown in the drawings.

The printing machine according to the invention as a sheet-fed printing machine consists of a sheet-fed guide system and a printing system.

In FIGS. 1 to 4, the sheet guide system includes a paper feeder 1, a paper feeder 2, a paper transfer device 3, e.g. The cylindrical system 4 consists of a central impression cylinder 4. It has a sheet-guiding central impression cylinder as 1.

The paper-guiding central impression cylinder 4.1 has two gripper devices 6, the number of gripper devices 6 being able to be increased or reduced.

In single-sided and double-sided printing presses (sheet-fed printing presses), the cylinder system 4 has a central sheet-guiding pressure 11!14.1 and a drum system 27 inserted between this and the delivery device 5. have. This drum system 27 is part of a back printing device 28. The drum thread 27 is connected to the back printing impression cylinder 29. Either have 1 (see Figure 6) or press the back side! 29.1 and transfer trunk 3
0 (see FIGS. 7 and 8) or two cylindrical cylinders which are selectively driven as rolling or conveying cylinders (see FIG. 9, German Democratic Republic Patent No. 54703).
It has four cylinders that are selectively driven as a rolling cylinder or a conveying cylinder (see Fig. 10, German Patent No. 110).
(Mira type described in Publication No. 7246).

In the case of double-sided printing in the Graneta system, the first rolling and reversing cylinder acts as the rolling and reversing cylinder 31, and the second rolling and reversing cylinder functions as the reverse printing impression cylinder 29, (2). The sheet is then reversed between the central paper guide impression cylinder 4.1 and the first paper reversal cylinder 31 or between the paper reversal IIFI 31 and the reverse printing impression cylinder 29.
The well-known method between 1 and 1 is performed.

In the case of one-sided printing, the paper is not reversed and is composed only of the drum thread 27 and the conveyance cylinder 32. Two navy blues.

The inversion 11ti29.1.31 can be used as the conveying cylinder 32 by converting the cylindrical system in a known manner.

In the case of double-sided printing using the Mira one-way system, the first, second, and third Gion reversing cylinders 31, 33, and 34 act together with the paper roll 8 rolling cylinder L7, and the fourth rolling and reversing cylinder acts as the reverse printing impression cylinder 29. The reversal of the 0 paper that acts as .1 is performed between the second spreading/reversing cylinder 33 and the third spreading/reversing cylinder 34 a 6 .

- In the case of surface printing, the paper is not reversed, and the I' hum thread 27 is composed only of the transport cylinder 32; The four rolling cylinders can be used as a transport cylinder 32 by converting the cylinder system.

Paper guide central impression cylinder 4. l. Back printing impression cylinder 29. l, transfer cylinder 30, spreading cylinder 31, 33, 34, and conveying cylinder 32
each has two gripper devices 6, in which case the number of gripper devices 6 can be increased or reduced.

The printing machine according to the invention as a web printing machine consists of a web guiding system and a printing image guiding system.

In FIG. 51, the web guiding system includes a printing material supply device with a winder 22 with an elevated horn supply roller 23, a cylindrical system 4 in the form of a web guiding central impression cylinder 4.2,
and a printing material ejecting device formed as a winder 24 with a web ejecting roller 25. In a double-sided printing press (web printing press), the cylinder system 4 has a web-guiding central impression cylinder 4.2 and a web-guiding back printing impression cylinder 29.2 downstream thereof; .

The printing image guidance system is formed as an endless heald guided via two guide rollers 8 on the central impression cylinder 4, i.e. a sheet-guiding central impression cylinder 4.1 or a web-guiding central impression cylinder 4.
．． 2, consisting of a printed image collection element 7 in contact with 2. The print image guidance system further comprises at least one printing station. This printing section includes an inking device 10 and a dampening device 11.
It consists of a plate cylinder 9 and an opposing impression cylinder 12.

The print image guide system is placed in front of the first printing section and is connected to the opposite I5.
a lacquering device 36 co-operating with a first drying bag'g137 and a second drying bag downstream of the last printing station.
It has a drying device 38.

The lacquer applicator 36 has a lacquer [39, applicator roller 4]
0, lacquer dispensing roller 41 and rough currer original roller 4
It consists of 2. The lacquer used ensures that:

- adhering to the printed image collection element 7 after drying by the first drying device 37;

- The ink applied by the printing section can only penetrate to a small extent and in the following printing section there is a return gap (Riickspal).
tuB) and double printing does not occur.

- the lacquer layer with the printed image is released from the printed image collecting element 7 by the action of the second drying device 3 and is applied to the sheet or to be printed by contact of the printed image collecting element rE7 with the cylinder system 4; Can be worn on the web.

In FIG. 1, a guide roller 8 acts as an opposing roller 15. The first drying device 37 is preferably designed as an initial dryer, for example a Joule heat dryer. The second drying device 38 is designed as an energy dryer, for example an infrared dryer.

The upper line 13 of the printed image gathering element 7 indicates that the lacquer layer is located in the area of contact between the applicator roller 40 of the device 36 and the counter 15;
Area of action of the first drying device 37, plate cylinder 9 and counter impression cylinder 12
1 and 4, the lower line 14 of the printed image gathering element 7 passes through the area of action of the second drying device 38 (see FIGS. 1 and 4), the printed image gathering element 7 has at least One cleaning device 16 and one declumping device 17 are operative.

The printed image collection element 7 is designed as an endless offset printing cloth 18 (see FIG. 3), but at least one offset printing cloth piece 19 is connected to the printed image collection element 7, in which case the printed image collection element If a plurality of offset printing strips 19 are connected to 7, an intermediate chamber for the gripper device 6 is provided (see FIG. 1).

The printed image gathering element 7 can also consist of at least one offset printed cloth piece 21 guided by a gripper device 20 (see FIG. 2) at the leading edge, the i1 edge and the trailing edge and/or the side edges. .

In the embodiment of FIG. 2, the printing station consists of a form cylinder 9 and a counterimpression cylinder 12 with an inking device 10 and a dampening device II in contact with the lower line 14 of the printed image gathering element 7. There is.

In the embodiment of FIG. 3, the printed portions of the first row contact the upper line I3 of the printed image set 9 element 7, and the printed portions of the second row contact the lower line 14 of the printed image set element 7. There is.

In the embodiment of FIG. 4, the sheet-guiding central impression cylinder 4.1 has another print image set i? with a printing section. ' is attached.

In the embodiment of FIG. 5, the web guiding central impression cylinder 4.2
A print image set required fi7 is attached to the file.

A back printing device 28 is attached to the back printing impression cylinder 29. This backprinting device 28 consists of a printing unit 28.1 or a further printed image collection element 28.2. The printing unit 28.1 consists of an offset cylinder 26 and a form cylinder 9 with an inking device 10 and a dampening device 11. The printed image set element 28, 2 is formed similarly to the printed image set element 7.

Next, the operation of the sheet-fed printing press according to the present invention will be explained.

The sheets removed from the paper feeder 1 are guided via the paper feed plate 2 and the paper transfer device 3 to the central impression cylinder 4.1. The printed image collecting element 7 passes through the contact area of the application roller 40 and the counter I5, ie the printed image collecting element 7 is applied with a lacquer layer. And prints? The 11 combining element 7 passes through the active area of the first drying device 37, during which the rough car layer is dried. The first ink passes through a printing area between the first ink and the first ink, and receives a printed image formed by the first ink.

Depending on the number of copies to be printed, different inks are applied in the same way. In that case, the ink is only a little lacquer! - Since it does not penetrate through the back, the return gap (Rilcks) in the subsequent printing section
pal tung) and double printing are not present in the raw.

Sheet-sheet image central pressure MI3I4.1 and printed image aggregation element 7
The lacquer layer deposited on the printed image-collecting element 7, including the ink, is liquefied by the heating by the second drying device 38, so that the lacquer Ili is almost completely separated from the rubber cloth; The ink can be completely transferred and is transferred to the sheet in the strokes passing through the printing area between the sheet-guiding central impression cylinder 4.1 and the printing PI image collecting element 7. The sheets are then led to a sheet delivery device 5. Printing of sea urchins and sea urchins is done in the same way.

In the case of a double-sided printing press, after the sheet has been printed on one side, it is passed to a back printing impression cylinder 29,l, which is connected to a printing unit 28.1 or a printed image collection element 28.2, which is known per se.
The back printing device 28 in the shape of -) is used to print on the back side. The sheets are then led to a sheet delivery device 5. Back printing in a web printing machine is performed in the same way.

The advantage of the printing press according to the invention is that the sheet guidance is simple, even for double-sided printing, and that it can be printed with minimal ink gap locations without overprinting problems.

[Brief explanation of the drawing]

Figure 1 is a print drawing @! Construction elements"Double (Schematic configuration diagram of an image conveyance type printing machine with a printing section on the line, Figure 2 is a schematic diagram of an image conveyance type printing machine with a printing section on the 11th line) Configuration diagram, Figure 3 is a schematic configuration diagram of an image transport type printing machine with printing units on the side of the printing i! Schematic configuration diagram of an image transport type printing machine with elements, No. 5
Figure 6 is a schematic diagram of an image transport type printing press with a printing unit, and Figure 6 is a schematic diagram of a double transport type printing machine with a reverse printing unit that can selectively print one side or both sides. , Fig. 7 is a schematic configuration diagram of an image transport type printing machine with an elephant gathering element, and Fig. 8 is a printing image for back printing that can selectively print on one side or both sides. A schematic configuration diagram of an image conveyance type printing machine with a unit and a transfer cylinder. Fig. 9 is a schematic diagram of an image conveyance type printing machine with a Buraneta two-sheet transfer machine that can selectively perform double-sided printing or double-sided printing. , FIG. 10 is a schematic diagram of an image conveyance type printing press with a mirror two-sheet transfer machine capable of selectively printing on one side or both sides, and FIG. It is a schematic configuration diagram. 1 Paper feeder 2 Paper feed plate 3 Sheet transfer machine 4 Cylindrical thread 4, I P1 sheet supply central impression cylinder 4.2 Web supply central impression cylinder 5f #paper machine 6 Grip claw device 7.7' Printed image gathering element 8 Home roller 9 Plate cylinder IO inking device 11 ff1L device 12 Opposing impression cylinder 13 Printed image (upper full line 14 of 9 elements of elephant set
Lower line of printed image gathering element 15 Opposing 1G Cleaning device 17 Lump removal device 18 Endless off-piece 1-printing space 19 Offset printing crossbar 20 Grip (claw device 21 Offset printing cloth piece 22 Winder 23 Web supply port ~24 Winder 25 Web rolling roller 26 Offset roller 27 Drum system 28 Back printing device 28.1 Printing unit 28.2 Printed image meeting element 29 Back printing impression cylinder 29.1 Sheet back printing impression cylinder 29. 2 Web eastward back printing impression cylinder 30 i1L cylinder 31 Sheet reversing cylinder 32 1112 feeding cylinder 33 Second sheet reversing cylinder 34 Third sheet reversing cylinder 36 Rough car applying device 37 First drying device 38 2 drying device 39 Lacquer tank 40 Forming roller 41 Lacquer dispensing roller 42 Lunker base roller

Claims (1)

[Scope of Claims] 1. At least one plate cylinder having a printing material supply device, a printing material transport device, a printing material delivery device, an inking device and a dampening device, the printing material transport device and the printing cylinder; In such an image-carried printing machine, which has at least one printed image transmission element in contact, the printing material transport device is a cylindrical system cooperating with a printing material ejecting device and a printing material feeding device. (4), each plate cylinder (9) is associated with a counter-impression cylinder (12), and the first printing section is equipped with a first drying device (37) cooperating with the counter-cylinder (15). An application device (35) is provided, the printed image transfer element being guided through the printing area between the at least one plate cylinder (9) and the at least one counterimpression cylinder (12);
said first drying device (37) being guided through the contact area between the lacquering device (35) and the counter cylinder (15);
is formed as an endless belt-like printed image collecting element (7) which is guided through the area of action of the cylinder system (4) and contacts said cylinder system (4), and which acts on the printed image collecting element (7) in the last printing section. An image transport type printing machine characterized in that a drying device (38) is provided downstream. 2. The cylindrical system (4) has at least one gripping device (
2. Image-transport printing press according to claim 1, characterized in that it is designed as a sheet-guiding central impression cylinder (4.1) with a central sheet-guiding impression cylinder (4.1). 3. The cylindrical system (4) has at least one gripping device (
a sheet-guiding central impression cylinder (4.1) with a sheet-guiding central impression cylinder (4.1) and a back-printing device (2.
8) and at least one back printing impression cylinder (29
2. Image-conveying printing press according to claim 1, characterized in that it consists of at least one drum system (27) having a drum system (27). 4. The cylindrical system (4) is connected to the first sheet-guiding central impression cylinder (4.
2. The image transport type printing machine according to claim 1, wherein the image transport type printing machine is formed as: 1). 5. The cylindrical system (4) is connected to the first web guiding central impression cylinder (4).
．． 2) and at least one web-guiding back-printing impression cylinder (29.2) downstream of this web-guiding central impression cylinder (4.2) and forming part of the back-printing device (28). 2. The image transport type printing machine according to claim 1, further comprising a drum system (27). 6. Image transport system according to claim 3, characterized in that the drum system (27) is designed as a sheet-back printing cylinder (29.1) with at least one gripping device (6). Printer. 7. The drum system (27) comprises a sheet-fed backing cylinder (29.1) with at least one gripper device (6).
) and a transfer cylinder (30) having at least one gripper device (6). 8. The drum system (27) selectively rotates the sheet reversing cylinder (29).
．． 4. Image-conveying printing press according to claim 3, characterized in that it consists of two transfer cylinders, which are formed as transport cylinders (1, 31) or transport cylinders (32). 9. The drum system (27) selectively rotates the sheet reversing cylinder (29).
．． 4. Image-conveying printing press according to claim 3, characterized in that it consists of four transfer cylinders, each of which is formed as a transport cylinder (1, 31, 33, 34) or a transport cylinder (32). 10. The back printing device (28) includes a plate cylinder (9) having an inking device (10) and a dampening device (11), and this plate cylinder (9).
) and the offset cylinder (2) in pressure contact with the drum system (27).
6. Image-conveying printing press according to claim 3, characterized in that it is designed as a printing unit (28.1) consisting of: 6). 11. The back printing device (28) has at least one plate cylinder (9) with an inking device (10) and a dampening device (11) and an opposing impression cylinder (12) and a drum system (27). 6. Image-carrying printing press according to claim 3, characterized in that it is designed as a further printed image gathering element (28.2) in pressure contact. 12. At least one plate cylinder (9) with an inking device (10) and a dampening device (11) is connected to a printed image gathering element (7).
2. Image conveyance printing press according to claim 1, characterized in that it is arranged above the upper line (13). 13. At least one plate cylinder (9) with an inking device (10) and a dampening device (11) is connected to a printed image gathering element (7).
2. Image-transport printing press according to claim 1, characterized in that it is arranged below the lower line (14). 14. At least one plate cylinder (9) with an inking device (10) and a dampening device (11) is connected to a printed image gathering element (7).
) is arranged above the upper line (13) and has an inking device (10) and a dampening device (11).
14. The image transport type printing machine according to claim 1, wherein the image conveyance type printing machine is disposed below the printer. 15. Image-carrying printing press according to claim 1, characterized in that the printed image gathering elements (7, 7') are designed as endless offset printing cloths (18). 16. At least one offset printing cloth piece (19
2. Image-carrying printing press according to claim 1, characterized in that the printing image collecting elements (7, 7') are firmly connected to the printing image collecting elements (7, 7'). 17. Image-carried printing according to claim 1, characterized in that the printed image gathering elements (7, 7') have at least one gripping device (20) for the offset printing cloth (21). Machine. 18. The lacquer application device (36) is connected to the lacquer bath (39).
), application roller (40), lacquer placement roller (41)
2. An image conveying printing press according to claim 1, further comprising a lacquer source roller (42) and a lacquer source roller (42). 19. Image-carrying printing press according to claim 1, characterized in that the first drying device (37) is designed as an initial dryer. 20. Image-transport printing press according to claim 1, characterized in that the second drying device (38) is designed as an energy dryer.