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Printing quality detecting device for printer

A printing quality and detection device technology, applied in printing machines, general parts of printing machinery, measuring devices, etc., can solve problems such as error detection, detection device error detection, etc., to increase reliability and prevent inappropriate operations and errors The effect of detection

Inactive Publication Date: 2006-12-27
KOMORI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the case of using light such as ultraviolet radiation or infrared radiation as the dryers 109, 110, the light from the dryers 109, 110 enters the detection cameras 107, 108, which causes false detection by the detection devices 107, 108
[0006] Especially at the gripper position of the transfer rollers 101, 102, the light is reflected in all directions, and the scattering of the reflected light causes the light to enter the detection cameras 107, 108, so false detections can occur

Method used

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  • Printing quality detecting device for printer
  • Printing quality detecting device for printer
  • Printing quality detecting device for printer

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0030] figure 1 It is a side view showing the essential parts of the four-color perfecting printing machine of the first embodiment of the present invention, figure 2 is an enlarged side view of the conveyor in the essential part of the printing press.

[0031] exist figure 1 In the illustrated printing unit 1 of a four-color perfecting printing machine, an impression cylinder 2 with an adhesive film with a clamping device (not shown) and a blanket cylinder 3 without a clamping device are rotatably supported on an approximately horizontal state, their peripheral surfaces are in contact with each other. Four plate cylinders are placed on the circumferential surface of the impression cylinder 2 with a film. Likewise, four plate cylinders (not shown) are placed on the circumferential surface of the blanket cylinder 3 . The inking device 5 , away from and out of contact with the plate cylinder 4 , is arranged movably so as to be able to supply ink and water when in contact wi...

no. 2 example

[0043] image 3 It is a side view showing the essential parts of the four-color perfecting printing machine according to the second embodiment of the present invention. Figure 4 is a diagram illustrating the principle of camera installation.

[0044] In this embodiment, the drying cylinders 11 and 12 in the first embodiment are removed; the back side UV device 16 is arranged on the opposite side of the conveying path of the first conveying chain 10; the face side UV device 15 is arranged on the first detection cylinder 17, so that the ultraviolet radiation from the surface side UV device 15 is blocked by the first detection roller 17, thus preventing the radiation from entering the surface side detection camera 21.

[0045] That is to say, the positional relationship between the face side UV device 15 and the face side detection camera 21 makes the ultraviolet radiation from the face side UV device 15 equipped with two bulbs 40a and 40b and a lampshade 41 be blocked by the f...

no. 3 example

[0048] Figure 5 It is a side view of essential parts of a four-color perfecting printing machine showing a third embodiment of the present invention.

[0049] In this embodiment, the impression cylinder 2 with adhesive film in the second embodiment is used as a transfer roller, the backside UV device 16 is provided on the circumferential surface of the transfer roller 2, and the transfer roller 6 is used as a transfer roller, The face-side UV device 15 is provided opposite to the circumferential surface of the transfer drum 6 . Since other structures are the same as those of the second embodiment, and image 3 The same members shown in are denoted by the same numerals, so their repeated descriptions are omitted.

[0050] According to this embodiment, the same actions and effects as those of the second embodiment can be obtained.

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Abstract

A printing press comprises transport means for transporting a printed sheet to a delivery unit, face-side and reverse-side UV devices for drying an ultraviolet curing ink printed on the sheet transported by the transport means, and a printing quality checking apparatus for checking the printed surfaces of the sheet transported by the transport means. Face-side and reverse-side checking cameras of the printing quality checking apparatus are provided at positions where the face-side and reverse-side checking cameras are not affected by heat and / or light from the face-side and reverse-side UV devices. The printing quality checking apparatus can reliably prevent improper operation and wrong detection of the face-side and reverse-side checking cameras without being adversely affected by heat or light from the face-side and reverse-side UV devices.

Description

[0001] All publications in Japanese Patent Application No. 2001-396608 filed on December 27, 2001 and Japanese Patent Application No. 2002-18004 filed on January 28, 2002, including specification, claims, drawings and abstract All are used as a reference in this application. technical field [0002] The invention relates to a printing press having a drying device for drying the ink and a printing quality detection device for detecting the surface of a sheet of paper on a transport path of printed products produced by printing. Background technique [0003] Hitherto, as discussed in Japanese Unexamined Patent Application No. 2001-287344, there has been a printing machine having a drying device and a printing quality detecting device. In this printing machine, as shown in Figure 13, the printed sheet is transported along the transport path indicated by the arrow in the figure, that is, the first transport chain 100→the first to the third transport cylinders 101~103→the first ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F33/14B41F21/08B41F23/04B41F33/00G01N21/892
CPCB41F33/0036
Inventor 日下明广
Owner KOMORI CORP
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