JPH0230532A - Sheet delivery method in rotary press - Google Patents

Abstract

PURPOSE:To enhance the nerve of a web to perform a high-speed printing by a method wherein a thin and wide web is vertically divided into halves after the completion of printing, and the webs divided into halves are overlappedly discharged. CONSTITUTION:A printing is conducted by using a large-width web 1, and the web 1 is vertically divided into halves by a rotary slitter 2. The webs 1a and 1b divided into halves are respectively changed in direction at right angles to the forward directions of the webs 1a and 1b by turn bars 3, 4 to be overlapped through two or more guide rolls 5. Thereafter, the webs are cut straight and discharged at high speed by a belt. Therefore, by overlapping the webs 1a and 1b on each other through the turn bars 3, 4, the nerve of the web can be increased, and a rotary press can be driven at high speed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a sheet output method in a rotary printing press, and more particularly to a sheet output method in which a two-layered web is straight-cut.

[Prior Art] Conventionally, in a method of cutting a wide web printed with a row cri cutter and outputting sheets, for example, a B2 width web is vertically divided into two in the center with a slitter device,
There was a method of cutting and discharging B3 or B4 sheets.

[Problems to be Solved by the Invention] If the aforementioned rotary cutter is used to cut a wide printed web as it is, the stiffness of the paper will be particularly weak in the case of thin paper webs. There were technical problems that needed to be solved, such as the inability to increase the printing speed because the leading edge of the sheet curled when it was wrapped around the cylinder and when loaded into the Layboy, resulting in uneven sheets.

The present invention has been made in view of such conventional technical problems, and its purpose is to provide a sheet feeding method for a rotary printing press that enables high-speed printing even on a thin paper web. It's about doing.

[Means for Solving the Problems] and [Operation] In order to solve the above-mentioned problems, the present invention has means for fertilizing.

The present invention is a sheet output method in which two sheets of printing paper are discharged, in which printing is performed using a wide web, and the web is vertically divided into two by a slitter in the center of the width.
The web divided into two is changed in its course by a coomber to form a two-layered web, and the web is sent to a cutter device, where the cutter device cuts the web straight and discharges it.

[Example] The sheet dispensing method of the present invention will be described below based on the drawings.

Printing is performed using a wide web 1, the web 1 is vertically divided into two by a rotary slitter 2, and the two divided webs 1a and 1b are cut perpendicularly to the traveling direction of the webs 1a and 1b by a Coomba 3.4, respectively. The web is changed in direction and passed through a plurality of guide rolls 5 to form a two-layered web. Thereafter, it is cut straight by the cutter device 6 and discharged at high speed by a belt.

Therefore, by overlapping the webs 1a and 1b via the turn bar 3.4, the webs can be made stiffer and the rotary printing press can be operated at high speed.

In addition, there are other methods of overlapping the webs using a turn bar, such as a method of processing in the same direction as the traveling direction and a method of bringing both webs closer to the center, so they can be combined as necessary.

[Effects of the Invention] As described above, a wide web of thin paper is divided into two in the vertical direction after printing, and the two divided webs are overlapped and discharged, which increases the stiffness of the web and therefore increases speed. Printing becomes possible and greatly contributes to improving productivity.

[Brief explanation of the drawing]

The figure shows an embodiment of the invention. 1: Web, 2: Rotary slitter 3.4:
Turn bar, 6. cutter device

Claims (1)

[Claims] In a sheet output method in which two sheets of printed paper are discharged, a wide web is used for printing, the web is vertically divided into two by a slitter in the center of its width, and the two divided webs are passed through a turn bar. Change the course of 2
A sheet output method for a rotary printing press, characterized in that a web is stacked, the web is sent to a cutter device, the cutter device cuts the web straight, and then discharges the web.