Apparatus for detecting printing plates and a printing plate monitoring system for a printing press

A printing machine and printing plate technology, applied in the printing plate monitoring system, the existence of the printing plate installation position, and the printing plate field on the printing plate cylinder, can solve the problems of negative pressure, blockage, etc.

Inactive Publication Date: 2010-11-24
高斯绘图系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the plate inspection system disclosed in that application can only check for the presence of plates that have been fully loaded onto the plate cylinder, i.e. the leading and trailing edges of the plates have been received and clamped in their locking grooves middle
[0011] Furthermore, known plate inspection systems also rely on a plurality of ventilation channels formed in their own plate cylinder which are blocked by the presence of the plate so that when a When a set of suction cups contacts the surface of a printing plate in the plate position on the plate cylinder, the vacuum circuit associated with the set of suction cups is closed, causing a negative pressure in the circuit

Method used

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  • Apparatus for detecting printing plates and a printing plate monitoring system for a printing press
  • Apparatus for detecting printing plates and a printing plate monitoring system for a printing press
  • Apparatus for detecting printing plates and a printing plate monitoring system for a printing press

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Embodiment Construction

[0060] Referring now to the accompanying drawings, the figure 1 A side sectional view of part of a printing unit 1 of a rotary offset printing press according to an embodiment of the invention is shown in , showing the plate cylinders 2 of one cylinder group or printing group mounted within a frame 4 and the offset printing Roller 3. As mentioned above, each printing unit 1 of the printing press comprises a plurality of cylinder sets, but only one set is shown and specified. It will be appreciated that for a complete four roll printing tower, 8 sets of equipment are required, one for each printing group.

[0061]The device for detecting the presence of partially loaded printing plates in discrete plate mounting positions on the printing press plate cylinder 2 is integrated with a printing plate loading / unloading head 5 comprising a plurality of attraction elements 6 grouped into each plate position. Each set of attraction elements 6 is connected to a discrete vacuum circuit...

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Abstract

Apparatus for detecting the presence of a partially loaded printing plate in individual printing plate mounting positions on a plate cylinder (2) of a printing press is disclosed. The system includes a discrete vacuum circuit associated with each individual printing plate mounting position. Each vacuum circuit includes suction elements (6) positionably spaced from the surface (2a) of a plate cylinder (2) so that, when a leading edge (7a) of a printing plate (7) has been received in a lock-up slot (10a) in a plate cylinder which is rotated to partially wrap said printing plate around said plate cylinder, a trailing edge (7b) portion of a printing plate is deflected away from the surface of the plate cylinder, due to its resilience, against the suction elements. It is thereby possible to generate a negative pressure in the vacuum circuit closed by said trailing edge portion of the printing plate against the suction elements. The existence of a negative pressure is used to indicate the presence' or absence of a partially loaded printing plate in each of the printing plate mounting positions.

Description

technical field [0001] The invention relates to a device for detecting printing plates. More specifically, it relates to an apparatus for detecting the presence of a partially loaded printing plate in an individual printing plate position on a plate cylinder of a printing press during a printing plate loading cycle, the invention also relates to a A printing press of a plate cylinder of the apparatus described above, and a method of detecting the presence of a partially loaded printing plate in an individual plate mounting position. The invention also provides a printing plate monitoring system and a method for monitoring a printing plate on a printing plate cylinder of a printing press. The plate monitoring system provides the operator of the printing press with information about the loading status at each plate position. Background technique [0002] A web offset printing press includes a plurality of printing units, each designed to print content onto a continuous web a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41F27/12
CPCB41F27/1212B41P2227/30
Inventor 基思·斯卡夫
Owner 高斯绘图系统有限公司
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