JPS625327Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a rotogravure rotary press using a web of paper, and more particularly to a rotogravure rotary press equipped with a device for feeding and winding a lead paper for registration during printing.

Gravure rotary presses are widely used as highly efficient printing machines because they are capable of high-speed printing and multicolor printing. In general, a gravure rotary press, as shown in FIG. In order to print, there is a printing unit 3 in which units of the number of colors necessary for printing are arranged side by side, and a punching device 4 that punches the printed gravure paper into the desired shape and size.
and a delivery conveyor 5 serving as a paper discharge device for storing punched blank gravure paper are sequentially arranged in the running direction of the gravure paper to perform gravure printing. Incidentally, reference numeral 6 designates a paper splicing device that can perform paper splicing without stopping the operation of the gravure rotary press.

When gravure color printing is performed using the gravure rotary press shown in FIG. 1, registration is performed prior to printing to prevent color shift due to printing.
When performing registration, a registration lead paper (base paper) is used. This lead paper uses base paper such as cheap cardboard, which is inferior in quality to gravure paper.

During registration, the paper feed roll 7 wrapped with registration lead paper is mounted on the paper feed stand 8 of the paper feed device 1, and the lead paper fed out from the paper feed device is guided to the printing unit 3. However, within this printing unit 3, registration is performed for each color.

However, in conventional gravure rotary presses, the lead paper registered for each color in the printing unit 3 is punched out into a predetermined shape and size in the punching device 4 to form a blank. The lead paper could not be used again for registration. In particular, since gravure rotary presses perform registration at high speed, a large amount of lead paper becomes blank during registration, making it impossible to utilize the material effectively.

On the other hand, paper feed rolls wrapped with lead paper for temporary printing and gravure paper for actual printing are attached to the paper feed stand 8 of the paper feed device 1, and the width of the paper feed stand 8 is shown in FIG. Registration (temporary printing) is limited by the width of the gravure paper.
The width of the registration lead paper is limited, and it is difficult to simultaneously attach registration lead paper and gravure paper of different widths to a paper feed stand.

This invention takes the above-mentioned points into consideration, and provides a gravure rotary press that effectively utilizes the lead paper for registration to eliminate waste of material, and also allows lead papers of different widths to be used for registration. The purpose is to

Hereinafter, embodiments of the gravure rotary press according to this invention will be described with reference to the accompanying drawings.

FIG. 3 is an overall layout diagram of the gravure rotary press according to the present invention, and reference numeral 10 in the figure indicates a paper feeding device for feeding gravure paper 11 made of cardboard suitable for packaging containers such as package containers. Paper feeding device 10
has a paper feed stand 12 that is swingably supported, and paper feed rolls 13 are mounted on both free ends of the paper feed stand 12. Gravure paper is wound around the paper feed roll 13, and the gravure paper 11 fed out from the paper feed roll 13 is guided to a printing unit 15 via a paper splicing device 14.

The printing unit 15 has units 16, 16 arranged side by side for the number of gravure printing colors, and each unit is equipped with a plate cylinder 17, a heating device, and a drying device using air blowing. The printed gravure paper 11 printed by the printing unit 15 is then guided to a punching device 18, where it is punched out into a desired shape and size to form a blank (unit form). The printed sheets formed into blank shapes are delivered to a delivery conveyor 19 as a paper ejection device.
, where it is temporarily stored and sequentially deposited.

On the other hand, in the vicinity of the paper feeder 10, a lead paper feeder 20 for feeding register paper (original paper) to the printing unit 15 is removably provided. This paper feeding device 20 has a lead paper 21 for registration.
The lead paper 21 fed out from the paper feed roller 22 is also sent to the printing unit 15 via the above-mentioned paper splicing device 14, and is registered in each unit 16 of the printing unit 15. Registration is performed and color misregistration in the printed area is prevented. The registered lead paper 21 is passed through the punching device 18
The gravure paper 11 is guided from the entrance side to a path branching off from the traveling path of the gravure paper 11, and is wound up by the winding device 23.

The winding device 23 includes the printing unit 15 and the punching device 1.
8, and has a winding roller 24 for winding up the registration lead paper 21 into a roll. The take-up roller 24 is rotatably supported, and the lead paper aligned with the take-up roller 24 is wound up.

In FIG. 3, reference numeral 25 is a side lay device for adjusting the tension of the gravure paper 11 and the lead paper 21.

Next, the operation of this invention will be explained.

In this gravure rotary press, prior to actual printing on the gravure paper 11, a registration lead paper 21 is provisionally printed. During this provisional printing, the registration lead paper 21 is fed from a lead paper feeder 20.
The fed lead paper 21 is sent to the printing unit 15 via the paper splicer 14, and as it passes through the printing unit 15, it is registered for each unit 16 to prevent color misalignment. The lead paper 21 that has been registered in the printing unit 15 is then branched off from the entrance of the punching device 18 on the discharge side and guided to a winding device 23, where it is wound into a roll by a winding roller 24 of the winding device 23. The lead paper 21 wound around the winding roller 24 is wound into a continuous form, so it can be reused as lead paper for registration,
This allows for savings in materials.

After the registration is completed, the gravure paper 11 is fed from the paper feeding device 10. The gravure paper 11 is sent to the printing unit 15 via the paper splicing device 14,
At this point, final printing is performed and gravure printing is performed. Gravure paper 11 on which gravure printing was performed
The material is then sent to a punching device 18, where it is punched out into a unit form (blank) having a desired shape and size. The punched gravure paper 11 is sent to a delivery conveyor 19, and then guided to a bookbinding process or the like.

When the supply of gravure paper 11 from one paper feed roller 13 is finished, the paper feed stand 1
2 is reversed, the other paper feeding roller 13 is brought to the paper feeding position, and the leading edge of the gravure paper 11 on the other paper feeding roller 13 is connected to the rear end of the previous gravure paper 11 by the paper splicing device 14. be done. With this connection, the supply of gravure paper 11 is temporarily interrupted. However, even if the supply of gravure paper 11 is temporarily stopped, the adjustment roller 14 of the paper splicing device 14
Since a increases, the gravure paper 11 is continuously supplied to the printing unit 15. Therefore, the printing unit 15 can perform the main printing continuously without interruption.

In addition, in the explanation of one embodiment of this invention,
Although the lead paper feeding device has been described in which a lead paper for registration is wound, gravure paper may be wound around the paper feeding device after registration by the lead paper is completed.

As described above, in the gravure rotary press according to this invention, since a lead paper feeder wrapped with registration lead paper is provided separately from the gravure paper feeder, the width of the gravure paper Registration can be performed using different lead papers. Therefore, the registration lead paper is not limited by paper width.

Further, since the registered lead paper is wound up by the winding device before being punched out by the punching device, the lead paper wound up by the winding device can be used again for registration. In this way, both the front and back sides of the lead paper can be used for registration, so
The same lead paper can be used several times for registration,
The material of the lead paper can be used effectively and the material can be saved sufficiently.

[Brief explanation of the drawing]

Figure 1 shows a conventional gravure rotary press, Figure 2
The figure is a plan view schematically showing a paper feed stand of a paper feed device incorporated in a rotogravure rotary press, and FIG. 3 is a layout diagram showing an embodiment of the rotogravure rotary press according to the invention. 10...Paper feeding device, 11...Gravure paper, 1
4...Paper splicing device, 15...Printing unit, 18
... Punching device, 19 ... Delivery conveyor, 20
... Lead paper feeder, 21 ... Lead paper, 2
2... Paper feed roller, 23... Winding device, 24...
Take-up roller.

Claims (1)

[Claims for Utility Model Registration] 1. A paper feeding device, a printing unit that prints gravure paper fed from the paper feeding device, and a punching device that punches the printed gravure paper into a desired shape and size. and a paper discharge device for punched gravure paper, a lead paper feeding device for feeding lead paper for registration is provided near the paper feeding device, and a lead paper feeding device for feeding lead paper for registration is provided in the vicinity of the paper feeding device. A gravure rotary press characterized by being equipped with a winding device that winds up lead paper. 2. The winding device has a winding roller that winds up the lead paper printed by the printing unit, and is provided between the printing unit and the punching device. Gravure rotary press.