WO1984001543A1

WO1984001543A1 - Continuous sheet printing machine

Info

Publication number: WO1984001543A1
Application number: PCT/JP1983/000372
Authority: WO
Inventors: Eiichi Isowa; Kazumi Hasegawa
Original assignee: Isowa Industry Co
Priority date: 1982-10-22
Filing date: 1983-10-22
Publication date: 1984-04-26

Abstract

A continuous sheet printing machine comprising one or more printing units, each of which comprises a sheet storage unit for holding a predetermined quantity of a continuous sheet ready to feed, a printing cylinder disposed downstream of the storage unit with a predetermined circular-arc length and an impression cylinder opposed to the printing cylinder, and a sheet tension supply unit disposed downstream of the printing unit for intermittently supplying the sheets to the printing unit by pulling a predetermined length of the sheet equal to or larger than the circular-arc length of the printing cylinder. In this manner, the printing surface of the predetermined sheet length can be sequentially formed without wasting margins on the sheet.

Description

Specification

Title of the invention Continuous sheet printing device

Technical field

The present invention relates to a continuous sheet printing apparatus, and more particularly, to any printing length within the range of the circumferential dimension of a plate cylinder of a rotary printing press, such as web paper or the like. The present invention relates to a novel printing apparatus capable of sequentially performing desired printing on each scheduled printing section of a continuous sheet.

Background art

In a rotary printing press, a long continuous sheet is supplied between a plate cylinder on which a curved printing plate is mounted and an EE cylinder, and printing is performed by a sandwich ε between the two cylinders. The printing dimensions of a continuous sheet are generally determined by the circumference of the plate cylinder. In other words, printing with dimensions larger than the entire circumferential dimension of the plate cylinder is not possible, and printing is possible when a printing plate having a circumferential dimension or less is mounted on the plate cylinder. However, since there is a margin between prints on a continuous sheet every time the plate cylinder is rotated, the drawback is extremely wasteful.

Therefore, as another means for printing an arbitrary size on a continuous sheet, it is conceivable to replace and use a plate cylinder having a circumferential dimension corresponding to a desired printing dimension each time. In this case, a large number of plate cylinders having different circumferential dimensions must be prepared in a desired number, which increases the installation cost, complicates the printing mechanism, and requires extra labor. As described above, in the continuous printing of a continuous sheet, generally, the circumferential dimension of the plate cylinder is the printing length on the sheet.

Therefore, it is impossible to perform printing in an arbitrary print length (of course, within the range of the circumferential dimension of the plate cylinder) and in order without producing a blank space between each print. Was.

However, it has been a long time in the industry to cut high-speed printing on webs and other continuous sheets, such as webs and films, with a print length of any size. Requested. As an example, in a corrugator line that continuously produces corrugated paper and rolls, a long rolled core paper and a liner are used. A liner is glued to the top of the corrugated corrugated step to produce a single-sided or double-sided corrugated pole, but printing on the resulting corrugated line is performed using a corrugated line. The printing is not performed in the inside, but is performed so that the sheet is cut into a predetermined size, cut into single-sheet steps, and then printed. At this point, taking a double-sided step pole as an example, as shown in Fig./Fig.

10 and back liner 12 are cored core paper

14, the front liner 10 and the rear liner 12 are externally connected to the flat. However, each liner has a portion a that is supported by the step top (so-called ridge) of the core paper, and a so-called valley b that is not supported by the top portion. Therefore, the print is not evenly printed on the liner at the time of printing, and there is a tendency for lightness and color unevenness to occur. For this reason, in order to print uniform and uniform on the steps and rolls, the line sheet must be in a continuous sheet before laminating the core and core paper. It is preferable to print on the printing paper, but it is applied as a repetition of the printing grain pattern along the circumference of the plate cylinder. Aside from such cases (for example, hinoki one-piece kimono), it is not possible to print on a liner at high speed without any wasted space at a print length of any size. Indeed, the realization was long-awaited.

In addition, if it is formed into a stepped ball and then passed through a rotary printing machine and clamped between the plate cylinder and the EE cylinder, the E-shrinkage strength of the stepped ball itself may be reduced. However, if printing is performed on a liner that is in a sheet state before molding, such concerns will be completely eliminated, and it is desirable from this point of view. That is it.

Disclosure of the invention

The present invention has been devised in view of the above-mentioned drawbacks of the related art, and does not cut a web or other continuous sheet, and has nothing between printed matter adjacent to each other. It is an object of the present invention to provide a continuous sheet printing apparatus that can perform printing with an arbitrary print length in a continuous state so that waste margins are not generated.

In order to achieve this object, a printing apparatus according to the present invention includes a sheet storage unit for retaining a predetermined amount of a continuous sheet unwound from a take-up roll in a running state, and a sheet storage unit. A printing cylinder located on the downstream side of the printing cylinder, which is provided with a printing plate having a predetermined arc length and having an arc length dimension, and an E cylinder disposed opposite to the printing drum, It is located downstream of the printing section and is the same as or larger than the arc length of the printing plate. Target o, It is characterized in that it is composed of a sheet pulling supply unit that supplies the sheet.

A sheet tension supply unit is provided on the downstream side of the intermittent sheet traveling path of the printing apparatus and rotates at a constant speed in synchronization with the plate cylinder. An arc-shaped member arranged in a plurality of rows spaced apart from each other and movable in the circumferential direction and having a predetermined arc length dimension; and an arc-shaped member arranged opposite to the cylinder and in contact with the arc-shaped member via a continuous sheet. Rotating self-imaging cylinder

Brief description of drawings

Figure / is a sectional view of the double-sided rule.

FIG. 2 is a partial sectional side view schematically showing a printing apparatus according to the present invention.

FIG. J is a plan view of the printing apparatus shown in FIG.

FIG. 1 is a schematic perspective view of a sheet pulling supply mechanism. Figure is a perspective view showing the details of the sheet tension supply mechanism.

FIG. 6 is a view similar to FIG. 5 showing a modification of the sheet tension drawing mechanism.

FIG. 7 is a schematic explanatory view showing a process of printing with a kiln according to the present invention over time.

In FIG. 1, the printing apparatus is basically composed of a sheet storage section indicated by reference numeral 16 and a printing section indicated by reference numeral 18, and is provided downstream of the continuous sheet traveling path of the printing apparatus. A sheet pulling and feeding device indicated by reference numeral 20 is provided. What The block indicated by reference numeral 22 is an option required for synchronizing with the line speed when installing in a Korge line in series. This is the second “2 sheet storage unit”.

On the upstream side shown in the figure, a sheet take-up port, a luca port, and a stand are attached, and are used for the table liner fed from this take-up roll. Continuous sheet 24 is a dancer group

The sheet is supplied to a sheet storage section 16 composed of 26, where the sheet is retained for a predetermined length while maintaining a running state. When the sheet 24 is intermittently pulled and supplied to the printing section 18 as described later, the sheet storage section 16 exerts an excessive tensile force on the sheet 24. It functions to prevent breakage and deformation due to elongation, and so long as it fulfills this function, the dancer shown in the figure is used. In addition to the so-called festoon structure by the file group 26, various structures can be adopted. The base frame 28 that forms the sheet storage section 16 has wheels on rails 30 that are used in common with the printing section 18 described later.

It is arranged at the self-traveling location via 3 2.

The printing section 18 located downstream of the sheet storage section 16 is provided with a first / printing unit 34 and a second printing unit 34 so that color printing can be performed in the illustrated embodiment. o2 The printing unit is composed of 36 units, but if monochromatic printing is sufficient, the printing unit is composed of / units, and performs multicolor printing of J colors or more. In this case, J units or more will be installed. This printing section

Each printing unit that constitutes 18 is basically a known ring.

A printing press, which includes a plate cylinder 40 and an upper part of the plate cylinder 40 in a base frame 38 which is disposed on a common rail 30 via wheels 32 via a running position. It has an E-barrel 42, which is arranged opposite to it. As shown in Fig. J, the plate cylinder 40 is rotatably supported by bearings 46, 46 via its rotary shaft 44, and a gear train is fed from a sheet tension supply device 20, which will be described later. Power is transmitted via the first and second printing units 34 and 36 via a bevel gear and a spline shaft. That is, in Fig. J, a spur gear 48 is fixed to the rotation shaft 44 of the second printing unit 36, and the driving gear 5 of the sheet tension supply device 20 described later in detail. 0, power is transmitted to the spur gear 48 through a series of gear trains 52, so that the plate cylinder 40 rotates. A bevel gear 54 is fixed to the end of the rotating shaft 44. The bevel gear 54 is combined with a bevel gear 58 attached to the end of the spline shaft 56, and the bracket The line shaft 56 is rotatably and horizontally passed through a bearing 60 mounted outside the base frame 38. As shown in the figure, the 7 ° line shaft 5S extends in parallel with and horizontal to the No./printing unit 34, and extends outside the base frame of the No./printing unit 34. The spline shaft 62 arranged on the other side is arranged so as to rotate independently and slide in the axial direction. A bevel gear 64 is rotatably mounted on the spline bearing 62, and the bevel gear 64 is a rotating shaft of the No./printing unit 34.

Combined with bevel gear 6 6 fixed to the tip of 4 4. Accordingly, the plate cylinder 40 of the second printing unit 36 is the gear train

/ / ' If the power is transmitted by 52 and driven to rotate in the direction of arrow A, the spline shaft 56 rotates in the direction of arrow B by the combination of the bevel gears 54 and 58, and another bevel gear It will be appreciated that the combination of the gears 64, 66 causes the plate cylinder 40 of the first / print unit 34 to be synchronously driven at the same speed and in the same direction. Also, since the spline shaft 62 is configured to slide independently in the axial direction with respect to the spline bearing 62 and the bevel gear 64, the spline shaft 62 is not connected to the spline shaft. -By moving the cutting unit 34 over the rail 30 without interrupting the power transmission to the printing unit 34, the second printing unit Can be separated from the target 36 by a predetermined distance. This depends on the size of the arc length of the printing plate 68 wound around the plate cylinder 40, and the length of the adjacent printing section of the continuous sheet 24 supplied to the printing unit 18. When the distance is set to a large value as required, it can be effectively used.

Incidentally, in FIG. O2, reference numeral 70 denotes an anilox roll for flexographic transfer, 72 denotes a rubber hole for ink kneading, and 74 denotes a rubber opening for inking. Ink supply nozzle, 76 is ink supply nozzle. Are shown.

Next, the details of the tension supply device 20 according to the present invention, which is disposed downstream of the printing unit 18, will be described. This sheet pulling supply device 20 is the second. 2 As shown in Figs. 1 to 3, a cylinder 78 having a slightly smaller outer diameter than the plate cylinder 4Q of the printing section 18 and a movement adjustment in the circumferential direction of the cylinder 78 are self-adjusted. And a plurality of arc-shaped members having a predetermined arc length arranged in the axial direction. 80 and a rotatable cylindrical body 82 located above the circular cylinder 78 and in contact with the arc-shaped member 80 via a continuous sheet 24. That is, the cylinder 78 has the same width as the plate cylinder 40 as shown in Fig. J (this width is set to be larger than the maximum width of the continuous sheet 24). However, the outer diameter is set slightly smaller than the diameter of the plate cylinder 40, and is rotatably supported by bearings 46, 46 via its rotating shaft 84. The drive gear 50 is fixed to the tip of the rotating shaft 84, and is driven by an electric motor (not shown) to rotate the cylinder 78 in the direction of arrow C. Along with the gear train 52, the plate cylinder 40 is rotated via the gear train 52, and the outer circumference of the cylinder 78 has a central angle? . An arc-shaped member 80 having an arc length dimension corresponding to the circular arc of the circular cylinder 80 is provided at the moving position in the circumferential direction, and the bracket-shaped arc-shaped member 80 is separated by a predetermined distance in the axial direction of the cylinder 78. It is arranged. However, of the arcuate members 80, the / are fixed to the cylinder 78 so that they cannot move in the circumferential direction. The other J arc-shaped members 8 (3 are rotatable at a predetermined center angle in the circumferential direction of the cylinder 78 by, for example, a mechanism described later with reference to FIGS. Therefore, by appropriately adjusting the rotation angle of the arc-shaped tension members, as shown in FIG. Thus, a plurality of arc-shaped protrusions that come into contact with the E body 82 are formed in the circumferential direction of the cylinder 78. This arc-shaped member 80 γ / ι? Ο The radius of the arc portion of the projection formed by the group is set to match the radius of the plate cylinder 40, and the arc length of the arc portion is set to a continuous sheet. Sheet pull-out dimensions when pulling 24 with E and N 2 pressed together with impression cylinder 82. 30 in the embodiment shown in FIGS. = 2 pieces of arc-shaped members 80 with a phase angle of «U are arranged in parallel. Since the arc-shaped projections having the central angle of are obtained, the continuous sheet 24 is drawn out by ½ of the entire circumference of the plate cylinder 40. In this embodiment, is the center angle of the arc-shaped member 80. . Therefore, it is necessary to change the force (（° X =) to cover a maximum of 30 ° by arranging the sheets, and change the number of sheets and other conditions as necessary. Is possible. For example, central angle / <2. It is possible to arrange J pieces of the arc-shaped members 80 (/ = 2。, 乂 3 3 = 3 0), and make the printing dimension of / times smaller than 版 of the plate cylinder circumference dimension. If so, what is the central angle of the arc-shaped member 80? . It is of course possible to set the number within the range and increase the number. Next, an embodiment of a mechanism for moving and adjusting the arc-shaped member 80 in the circumferential direction of the cylinder 78 at a predetermined central angle in the device of the present invention will be described with reference to FIGS. As shown in Fig. 7, in the axial direction of the circumferential surface of the cylinder 7 8, an outer gear ring 86, with a gear engraved on the outer circumference, turns at a predetermined interval and turns by itself. Arranged on the side of each outer gear ring 86, for example, the center angle? The arc-shaped member 80 forming? ° is fixed. The left side of the figure

C, '? I

, '-. J The arc-shaped member 80 is fixed to the cylinder 78. At this time, the outer peripheral surface of the arc-shaped member 80 is of course dimensioned so as to protrude a predetermined distance from the gear peripheral surface of the outer gear ring 86. At a fixed position (not shown) on the radially outward side of the cylinder 78, gears 88 that are combined with the outer gear rings 86 are respectively and rotatably arranged correspondingly. A driving motor 90 is directly connected to the gears 88, respectively. Therefore, when each motor 3Q is urged, the corresponding outer gear ring 86 rotates in the circumferential direction of the cylinder 78, and accordingly, the arc-shaped member 80 and the cylinder 7 also rotate. 8, the phase angle of the fixed arc member 80 is adjusted.

In addition, the koto diagram shows an embodiment in which the phase angle of each arc-shaped member 80 is adjusted by one motor in the configuration example of FIG. 5, and a common motor 9 (rotation of 3 The gears 88 are connected to the shafts, respectively, and the corresponding clutches 92a to 92c are interposed and connected as shown in the figure. ^ Adjust the phase angle from the material 80a, cut off the corresponding clutch 92a after the adjustment is completed, and then

Adjust the phase of 80b, and after the adjustment is completed,

As in the case of releasing 9 2 b, the clutches are sequentially released from the farthest motor 90 to the nearer motor 90. In both cases of Fig. 1 and Fig. 2, in practical use, a running register and other differential mechanisms are used for the motor drive mechanism according to each specification. Will be Further, since the cylinder 78 is rotated by using another motor 94 as a driving source as shown in the figure, it is combined with the outer gearing 86. The gear 88 rotates freely when the cylinder 78 rotates.

The operation and effect of the continuous sheet tension supply device according to the present invention thus configured will be described below. Prior to the operation of the device, desired printing on the continuous sheet 24 is performed. The length is determined (this depends on the arc length of the printing plate 68 wound and mounted on the plate cylinder 40), and then the sheet pulling and feeding device 20 is provided with the mechanism illustrated in FIGS. By moving the arc-shaped member 813 around the cylinder 78, the tension dimension corresponding to the printing length is set. · For example, in the embodiment shown in FIGS. 2 and J, the arc length of the printing plate 68 attached to the plate cylinder 40 is the length of the circumference of the plate cylinder; The arcuate member 80 in this example has a central angular force '/ g0 of a circular arc formed by the arcuate member 80 as a whole. The arc length is set to be equal to the arc length dimension of the printing plate 68.

When the sheet tension in the sheet tension supply device 20 is determined in this way, the interrupted sheet 24 is set in the printing device. In the sheet storage section 16 located on the upstream side of 18, the sheet 24 can be kept in a running state for a predetermined length so that the sheet can be supplied promptly and smoothly. Please complete the adjustment at the same time. After the sheeting is completed, if the printing device starts operating, Each time the cylinder 78 rotates ^ /, the continuous sheet 24 is pressed by the arcuate member 80 and the impression cylinder 82, and the arc length of the printing plate 68 (-of the printing cylinder circumference; ^) It is pulled intermittently by the number of minutes and moves forward through each print kit (34, 36). If the printing plate 68 of the plate cylinder 4Q arrives on the sheet by adjusting the timing when the continuous sheet 24 is intermittently supplied, printing of the desired printing length is not possible. Is done. Note that the arc-shaped member 813 has finished contact with the impression cylinder 82, and the remaining mark is left. While rotating, the sheet 24 pulling supply is stopped, and the printing plate 68 is also separated from the opposing cylinder 42 and the remaining / is also removed. Since the vehicle is running, printing is performed during this time. Next, when the arcuate material 8 (Ϊ arrives again at the contact position with the E-cylinder 82 and starts pulling the sheet 24, the printing plate 68 is synchronously moved to the contact position with the E-cylinder 42 again. (So-called top dead center), printing is started, and this cycle is repeated intermittently, so that the printing surfaces of a predetermined length are in contact with each other and are sequentially formed on the sheet. It is possible to produce waste margins.

This printing mode will be described in further detail by taking as an example a case where the printing is carried out by using a rotary printing press. FIG. 7 shows the respective modes when printing is performed by the printing apparatus according to the present invention in the state of intermittent ⑦ to 経時, and reference numeral 40 denotes a rotary printing press. The plate cylinder 68 designates an arc-shaped printing plate mounted on the plate cylinder 40, and the arc length of the printing plate 68 is set to the circumferential dimension JT D of the plate cylinder 40. It is assumed that Reference numeral 24 denotes a continuous sheet to be printed. Is shown below, with the planar state of the continuous sheet 24 corresponding to the position. In the plan view of this continuous sheet 24, sections A, M, C, ... divided by vertical lines are areas where printing is to be performed, and printing power is applied to these areas. Printed material A ₁ B 1, C! ,… In the case shown in the figure, the dimension in the flow direction of the area to be printed is larger than the actual printing length, but in the case of full-screen printing, the area dimension is not equal to the printing length. To

(And ^). Further, the printing length substantially matches the arc length dimension (jD) of the printing plate 68.

In addition, in FIG. 7, the arc length of the arc member 80 is set to be equal to the flow direction dimension of the printing planned area, so that the cylinder 78 is rotated in the arrow direction. Arc-shaped member

When the continuous sheet 24 is sandwiched between 80 and the impression cylinder 82, the continuous sheet 24 is intermittently pulled and supplied by the length L in the direction of the arrow.

Appropriate timing control is performed so that the printing plate 68 attached to the plate cylinder 40 arrives on the continuous sheet 24 during the intermittent supply of the intermittent sheet. What should I do? That is, in FIG. 7, the tip end a of the arc-shaped member 80 of the cylinder 78 in the rotating direction comes into contact with the continuous sheet 24 and the sheet 2 together with the E cylinder 82. 4. Hold (4) and start pulling in the direction of the arrow. At this time, the leading end b of the printing plate 68 attached to the plate cylinder 40 is still in contact with the force arriving slightly before the predetermined printing contact position c and still in contact with the sheet 24. No The length of the arc between b and C is the vertical margin d in each of the printed materials A 丄, B i, C i, ...).

Next, as the cylinder 78 rotates counterclockwise, the sheet 24 is pulled forward in the direction of the arrow as shown in Fig. 7>, and the leading end b of the printing plate 68 is printed. Printing is started when the contact position c is reached. Further, the continuous sheet 24 is pulled and supplied only by the arc length of the arc-shaped member 80 through the processes shown in FIGS. 7A to 7C, so that the printed material Ai of the print length is completed.

As shown in FIG. 7 (|), when the rear end e of the arcuate member 80 separates from the continuous sheet 24 and releases the contact, the sheet 14 immediately stops moving. Is done. However, the plate cylinder 40 and the cylinder 78 (both are designed to rotate at the same diameter and the same speed) continue their rotation irrespective of the supply stop of the continuous sheet 24. Then, the processes shown in FIGS. 7 to 7 are repeated again. For this reason, the sheet 24 is intermittently sent in the direction of the arrow by a predetermined dimension L, and the next printing area B, C,... Each time it arrives, a print of the print length is applied to each area, and prints B i, C 丄,..., Which are adjacent in the longitudinal direction on the same sheet, are obtained.

As described above, according to the printing apparatus of the present invention, when printing on an intermittent sheet, the continuous sheet is intermittently supplied at a predetermined wavelength while the plate cylinder is constantly rotated at a constant speed. When the sheet is intermittently supplied, the printing plate arrives on the sheet and prints. The continuous printing can be performed at any printing length without cutting the continuous sheet. It is determined by the length of the printing plate mounted on the plate cylinder, and therefore is of course limited to the circumferential dimension of the plate cylinder.) However, prints 1, 8 which are adjacent to each other _It has many beneficial effects, such as no wasted white space between 1, 01, ....

The print unit 34 and the second print unit 36 are assumed to be normally arranged in close contact with each other as shown in Fig. What is the diameter of each plate cylinder 40? J 丽

(Circumference dimension is / ε L 2 rm), and the minimum inter-axis distance between both plate cylinders is assumed to be / c.

Prior to the operation of the device, the desired printing length for the interrupted sheet 24 is determined (this depends on the arc length of the printing plate S8 which is wound and mounted on 3) and Next, by operating the running register in the sheet pulling supply section 2 (3), the arc-shaped pulling member 80 is moved around the cylinder 78 to thereby perform the printing. For example, in the embodiment shown in Fig. 2 and Fig. J, the arc length of the printing plate S8 mounted on the plate cylinder 40 is set to the plate cylinder circumference dimension / S 2 Since the leakage is set to 3 / dragon, the central angular force / which is formed by the entire circular arc of the circular cylinder 78 as well as the arc-shaped tension member 80 to be cut. Is set so that the sheet tensile dimension length by the arc length becomes 3 _c . G. Sheet tension in tension supply section 20 '' Dimensions? ? / At the position set in the basket, the continuous sheet

2 Set 4 in the printer.

After the sheeting is completed, the printing machine will start operating. In this case, what is the sheet tension? v? / ms «, whereas the minimum axis distance of the plate cylinder when the print unit is in close contact is set to / 00, as described above, so = 2 colors When the eyes are printed, the printing origin (the top of the printing surface of sheet 24 and the top dead center of plate cylinders 4Q and E cylinders 42) at o2 printing unit 36 is completely aligned. I will not do it. The printing unit 34 is retracted with respect to the printing unit 36 so that the distance between the two plate cylinders is equal to the sheet cutting dimension length. It should be spaced to be an integer multiple of 3 / Na (usually the sheet cutting dimension length, preferably set to be twice as long). It is not necessary to separate the printing unit 36 from the sheet tension supply unit 20, but the arcuate tension member 92 always passes through the same printing location on the sheet. Thus, it is preferable that the two devices are also separated by an integer multiple in the same manner. Also, is the distance between the axes between the plate cylinder 40 of the 2nd printing unit 36 and the cylinder 78 of the sheet tension supply section 2Q equal to the sheet cut length? J / 一致 is matched.

When the printing operation is started at the position thus set, the sheet 24 is marked by the action of the clamping E between the arc-shaped tension member 80 and the impression cylinder 82 every time the cylinder 78 rotates half a turn. Is it equivalent to the arc length of plate 68? 3 / view (= Tension is intermittently pulled forward by the length of the plate cylinder circumference, and moves forward in the No. / print cutout 34. Continuous printing of the desired printing length is performed by bringing the printing plate 68 of the plate cylinder 40 onto the sheet by adjusting the timing when the sheet 24 is intermittently supplied. . At this time, the portion printed by the No./printing unit 34 moves to the front of the intermediate portion between the two plate cylinders, and the sheet tension member 80 is connected to the E cylinder 82 by After the contact of the remaining /. While rotating, the pulling supply of sheet 24 is stopped. At this time, the printing plate 68 is also separated from the opposing body 42, and the remaining / is also left. During this time, printing is not performed on the sheet during this time.

Next, when the sheet pulling member 80 reaches the position of contact with the barrel 82 again and starts pulling the sheet 24, the sheet 24 becomes? 3 / 鹏 is sent further forward, and the leading end of the printing surface printed by the first printing unit 34 coincides with the top dead center of the second printing unit 36. Stop. After the printing origins of the second printing unit 36 match in this way, the next printing sheet pulls the printing surface to the position of the second color in the second printing unit. Printing is performed and this cycle is repeated thereafter. For this reason, the printing surfaces of a predetermined length are sequentially formed adjacent to each other on the sheet, and the paper does not generate unnecessary margins.

In this print cycle, after the printing surface is printed in the second printing unit 34, the printing surface is paused before reaching the second printing unit 36. In this case, two stamps 68 are wound around each plate cylinder 40 and the sheet tension at the sheet tension part 20 is set to the length of the stamp.

OV? I It is preferable to set the number to double since the print job arrives at the second print kit 36 immediately after printing at the print unit 34 and the printing origin also coincides. .

Next, when the cutting dimension length of the sheet 14, that is, the pulling dimension length of the sheet is larger than the minimum center distance of the plate cylinder between the two printing units, the same applies to the printing press. There is a problem that the printing origin in the unit does not match. Therefore, in this case, the first printing unit 36 is separated from the second printing unit 36 so that the required cutting dimension length of the sheet 24 matches the center distance between the two plate cylinders. You can do it. For example, the minimum distance between plate cylinders is / /, and the required cutting length of the sheet is

/ 2 娜 If the print unit has an interval of only 0 000 (= / 2 0 0-/ 0 0 0) between the two print units, then perform intermittent printing. I do.

In this way, according to the present invention, when a continuous sheet is intermittently transported by a predetermined cutting dimension length to perform multicolor printing in a plurality of printing units, The above-described means are used for the case where the required cutting dimension of the sheet is smaller or larger than the minimum center-axis distance between the plate cylinders in the plurality of printing units adjacent to each other. It is possible to cope more appropriately by taking this measure, and it is possible to easily achieve the printing origin alignment of multicolor printing.

Industrial applicability

The present invention is preferably used for printing on a continuous liner in a corrugator line for manufacturing corrugated balls. — Iy —

In addition to this, it can be widely applied to printing on long films, fabrics, webs, etc. with an arbitrary print length.

Claims

— Ό-Claims

A sheet storage unit for retaining an intermittent sheet fed from the winding roll in a running state by a predetermined amount, and a mark located downstream of the sheet storage unit and having a predetermined arc length. A printing section comprising a plate cylinder on which a plate is mounted and an impression cylinder disposed opposite thereto, or a printing section thereof, and a printing section located downstream of the printing section and having the same length as the arc length of the printing plate. Or a continuous sheet printing apparatus comprising a sheet tension supply section for intermittently supplying the sheet to the printing section by pulling the discontinuous sheet by a predetermined dimension length larger than this.

(2) The sheet pulling and feeding section is provided at a downstream side of a continuous sheet traveling path of the printing apparatus, and is a cylinder that rotates at a constant speed in synchronization with the plate cylinder, and an outer periphery of the cylinder. An arc-shaped member arranged in a plurality of rows at a predetermined distance in the axial direction and having a predetermined arc-shaped dimension that can be moved and adjusted in the circumferential direction, and is arranged opposite to the cylinder, and is continuous with the arc-shaped member. A printing device for a continuous sheet according to Claims / Claims, comprising a rotating body that comes into contact with the sheet.

π

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