Printing – Cleaning attachments
Patent
1995-03-01
1997-10-28
Burr, Edgar S.
Printing
Cleaning attachments
101423, B41F 3500
Patent
active
056808186
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a dust removing apparatus and system for removing ink or paper dust from a printing plate of a printing press.
DESCRIPTION OF THE BACKGROUND ART
In printing process with various types of printing presss, ink or paper dust adheres to a printing plate during printing, and it causes pinhole-shaped blank areas called hiekeys on prints. For this reason, it is necessary to remove dust from a printing plate of a printing press during printing or at its idle time.
In this regard, there has been proposed a printing-plate dust removing apparatus, as disclosed in Japanese laid-open Patent Application No. 5-57881, including a guide member provided along a plate cylinder; a slider moving along the guide member; a holder supported by the slider; a moving member supported by the holder, which has a plurality of dust removing blades arranged with predetermined pitches; and a driving gear for shifting the moving member intermittently.
In this dust removing apparatus, the holder supporting the moving member is shifted along the plate cylinder together with the slider to be located at a specified position for dust removing, and then, the moving member is located at a working position where one of the dust removing blades is opposite to the plate cylinder so that dust removing can be carried out. After dust removing, the moving member shifts to a standby position where the corresponding dust removing blade is not opposite to the plate cylinder and then stops. Subsequently, whenever a dust removing operation is required, the moving member is again shifted intermittently between the above working position and standby position so that one of the dust removing blades adjacent to the previous one is opposite to the plate cylinder in order.
In addition, this dust removing apparatus requires a replacement of a moving member with a new one after using all the dust removing blades on the moving member.
In the conventional printing-plate dust removing apparatus, the driving gear has a driving source (e.g. stepping motor) placed in a machine mount on which the guide member is installed so as to transmit power from the driving source to the moving member through a power transmission mechanism. The power transmission mechanism, however, is directly connected to the holder or the moving member which has been set on the holder, and this results in an extremely complicated dismantling procedure to remove the holder with the moving member from the slider.
An object of this invention according to claim 1 is to provide an apparatus for removing dust from a printing plate of a printing press which achieves an easier removal or installation work of a holder from or into a slider so as to solve the above problem.
The conventional apparatus also requires initializing a position of the moving member, which sets dust removing blades on a new moving member at a position which is not opposite to the plate cylinder whenever the moving member has been changed, and this leads to inferior replacement workability.
An object of the invention according to claim 2 is to provide an apparatus for removing dust from a printing plate of a printing press including a replaceable moving member with a plurality of dust removing blades, which has a compact apparatus configuration and achieves an improved replacement workability of the moving member.
Also, in the above conventional printing-plate dust removing apparatus, a holder must be firmly attached to a slider and they are required to be easily removed and installed.
The invention according to claim 3 is provided in consideration of the above condition, and an object of the invention is to provide an apparatus for removing dust from a printing plate of a printing press in which a holder of a dust removing head can be removed from or installed on a slider easily and securely.
An object of the invention according to claim 4 is to provide an apparatus for removing dust from a printing plate of a printing press in which an attachment of a holder to a slider is
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patent: 5148746 (1992-09-01), Fuller et al.
patent: 5223041 (1993-06-01), Cerney
patent: 5255606 (1993-10-01), Iijima et al.
patent: 5385096 (1995-01-01), Suzuki
Idogawa Kunio
Mizuno Ken-ichi
Nomura Yoshihiro
Ogiwara Toshiyuki
Suzuki Tadashi
Burr Edgar S.
Dai Nippon Printing Co. Ltd.
Nguyen Anthony H.
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