US 9,701,108 B2Granted

Printing plate holding apparatus

AssigneeMiyakoshi Printing Machinery Co., Ltd.

InventorsReishi Fujiwara, Hitoshi Tomaki, Kazumi Odashima

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Abstract

A printing plate holding apparatus is provided which during a high speed printing operation reduces vibrations and noises caused in a groove for having a grip leading end and a grip trailing end of a printing plate inserted therein, which can fasten the printing plate with greater certainty, and which is suitable for the printing plate to be held securely on such as a sleeve cylinder whose weight reduction is demanded. It is a printing plate holding apparatus in which a printing plate 5 wound on a plate cylinder 2 is to be held securely thereon in a rotary press, the apparatus having a plate insertion groove 4 formed on an outer peripheral surface of the plate cylinder 2 and extending axially of the plate cylinder 2 for receiving a grip leading end 5a and a grip trailing end 5b of the printing plate 2, and comprising a printing plate retainer plate 6 and a tap bolt 7 for bringing both widthwise lateral end portions of the grip leading and trailing ends 5a and 5b of the printing plate into overlapping each other in the plate insertion groove 2 and for pressing and fastening them against a constraint surface 4b with which the grip trailing end 5b is in contact, in the plate insertion groove 4.

Claims4

Dependent claims

A printing plate holding apparatus in which a printing plate that is able to be wound on a plate cylinder is held securely thereon in a rotary press, wherein the plate cylinder comprises a plate insertion groove which is formed on an outer peripheral surface of the plate cylinder, which extends axially of the plate cylinder, and which is adapted to have a grip leading end and a grip trailing end of the printing plate inserted into the plate insertion groove, and wherein the printing plate holding apparatus consists of:

a printing plate retainer plate and a tap bolt which are adapted to bring both widthwise lateral end portions of the grip leading and trailing ends of the printing plate into overlapping each other in said plate insertion groove and which are adapted to press and fasten said both widthwise lateral end portions of the grip leading and trailing ends of the printing plate against a constraint surface which is a wall surface of said plate insertion groove and with which the grip trailing end of the printing plate is adapted to be in contact in said plate insertion groove, wherein said tap bolt is screwed into a wall tapped hole formed on said constraint surface so as to directly press the printing plate retainer plate in a substantially circumferential direction of the plate cylinder and so as to press and fasten said both widthwise lateral end portions of the grip leading and trailing ends of the printing plate against said constraint surface via said printing plate retainer plate.

Dependencies are inferred from the claim text.

Facts

Application: 14/727,404Filed 1 Jun 2015
Priority: JP 2014-2469655 Dec 2014
Published: US 2016/0159078 A19 Jun 2016
Granted: 11 Jul 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

B41F 27/10
Devices for attaching printing elements or formes to supports: for attaching non-deformable curved printing formes to forme cylinders
B41F 27/1225
Comprising printing plate tensioning devices: moving in the printing plate end substantially rectilinearly
B41F 27/125
Comprising printing plate tensioning devices: moving in the printing plate end on a curvilinear path, e.g. by winding on a roll
B41F 27/1262
For attaching flexible printing formes: without tensioning means