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AssigneeFuji Photo Film Co., Ltd.
InventorYasuhiro Annoura
Estimating the term…
The present invention discloses a planographic printing plate having a notched portion on its surface having a required size, and having smaller burrs at a rear face, and a planographic printing plate cutting device and a planographic printing plate cutting method for forming such a planographic printing plate by cutting. The planographic printing plate cutting device of the present invention includes an upper roller for forming a recessed section at the planographic printing plate. The upper roller, which is formed substantially into a disc shape as a whole, has a pressing portion parallel to a web (the planographic printing plate), and a slope portion that is slanted with respect to the surface of the web at a predetermined inclination. This upper roller presses the web such that a sloped face (recessed section) that is slanted with respect to the surface of the web is formed. Next, a shearing roller shears the web at the sloped face such that a remaining portion of the sloped face forms a notched portion. Because formation of the notched portion and the shearing process are carried out as separate processes by separate members, a notched portion having a required size can be formed at the surface, and burrs at the rear face can be reduced.
A device for machining a planographic printing plate having a printing side surface, the device comprising:
A device for machining a planographic printing plate having a printing side surface and a base side, the device comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Having rotary shearing discs arranged in co-operating pairs: with several spaced pairs of shearing discs working simultaneously, e.g. for trimming…
Preparing for use and conserving printing surfaces
Planing
Printing plates or foils
Term ended 16 Jun 2020 (estimated)
1. Field of the Invention
The present invention relates to a planographic printing plate machining device, a planographic printing plate machining method and a planographic printing plate, and more particularly, concerns a planographic printing plate capable of improving the appearance of a surface of printed paper, and a planographic printing plate machining device and planographic printing plate machining method for providing such a planographic printing plate through a machining process (in particular, machining at edge portions).
2. Description of the Related Art
FIG. 1 is a perspective view that shows a machining line for a PS plate having a shearing section of a first embodiment of the present invention.
FIG. 2 is a side view that shows the shearing section of the first embodiment of the present invention.
FIG. 3 is a perspective view that shows the shearing section of the first embodiment of the present invention.
FIG. 1 shows a machining line 90 for a PS plate having a shearing section 10 that is a planographic printing plate machining device of a first embodiment of the present invention.
At an upstream side of this machining line 90 (upper-right side of FIG. 1), a feeding machine 14 for successively unwinding a web that has been preliminarily wound up into a roll shape is disposed. The elongated web 12, fed from the feeding machine 14, is subjected to a curl-removing treatment at a leveler 15, reaches a feed roller 16 at which joining paper 18 is affixed and made to closely contact by a static charge, and sent to a notcher 20.
The notcher 20 provides a cutout section at the web 12 so that upper rollers 36, 38 and 40 and lower rollers 42, 44 and 46 of a pressing roller 22 forming the shearing section 10, and upper blades 48, 50 and 52 and lower blades 54, 56 and 58 (see FIG. 2 and FIG. 3) of a shearing roller 24 also forming the shearing section 10 are allowed to shift in the width direction of the web 12 at the position of this cutout. Hence, it is possible to change a trimming width of the web 12, while the web 12 and the joining paper 18 are being continuously sheared together. Hereinafter, “width direction”, when referred to simply thus, represents the width direction of the web 12; and “inside” and “outside” respectively represent an inside and outside in the width direction of the web 12.