摘要:
A cylindrical printing plate formed with high precision and used for printing on a metal can body, particularly an aluminum or aluminum alloy can body. The forming method of a printing plate forms the printing plate to be mounted on an outer periphery of a cylindrical plate cylinder, and includes a notch forming step of forming a positioning notch in a rectangular elastic material sheet in which a resin layer to be served as a plate section is formed on one surface. A cylindrical material forming step rolls the elastic material sheet in which the positioning notch is formed and overlaps both end portions of the elastic material sheet and joining them in a cylindrical shape. A plate section engraving step engraves a printing pattern on the plate section of the elastic material sheet formed into a cylinder shape.
摘要:
Provided is a printing plate cylinder to which a sleeve printing plate is detachably attached. In the printing plate cylinder, weight reduction and radiation performance can be improved, and generation of rust can be suppressed. The printing plate cylinder (1) includes a shaft portion (3) rotatable about a central axis (O), a tubular portion (5) formed cylindrically, arranged coaxially with the shaft portion (3), and arranged at a distance from an outer circumferential surface (3a) of the shaft portion (3), and a rib (7) fixed integrally to the outer circumferential surface (3a) of the shaft portion (3) and an inner circumferential surface (5b) of the tubular portion (5) and connecting the shaft portion (3) and the tubular portion (5). An air supply channel (31) is formed so as to penetrate from the outer surface of the rib (7) exposed to the outside to the outer circumferential surface (5a) of the tubular portion (5).
摘要:
A printing member such as a printing cylinder includes an at least partly metal cylinder, or a sleeve to be mounted on a mandrel rotating about its axis. The printing member comprises a body having a thickness. With the printing member there is associated an activatable signaling device that is connectable to a recording device that is arranged to store data related to at least one characteristic of the printing member or to the use of the printing member. The activatable signaling device can include a transponder such as an RFID.
摘要:
A method for making a roll for a rotary printing press includes cutting a strip of a material so as to form a first web with a plurality of first tabs disposed one after the other and extending from the first web. The plurality of first tabs is bent relative to the first web so as to form a strut strip having the tabs extending from the web at an angle relative to the web. The strut strip is wrapped about a cylindrical form so as to form a cylindrical tube with the plurality of first tabs extending from the tube.
摘要:
A sleeve for a cylinder of a printing, coating or the like machine, comprising in particular a lithographic layer, a compressible layer, a support layer and, between the two last layers, a heat-shrinkable layer for permitting the adaptation of the sleeve to the diameter of a cylinder.
摘要:
A replaceable sleeve having a working surface is provided which is adapted to be mounted on a carrier. The sleeve includes an inner polymeric layer, a reinforcing layer overlying the inner layer, an intermediate polymeric layer overlying the reinforcing layer, and an outer polymeric layer. The sleeve may include a cushion layer between the intermediate layer and the outer layer. The layers comprising the sleeve are formed around a support and then cured simultaneously in a single step. The resulting sleeve may be used in printing operations or in other applications such as coating, embossing, laminating, calendering and the like.
摘要:
A flexible jacket covering is pre-stretched, pre-flattened and pre-cut to predetermined length and width dimensions for attachment onto a transfer cylinder. The flexible jacket covering is marked with alignment stripes and centering marks for faster, simpler and precise attachment of the flexible jacket covering onto the transfer cylinder in an operative position. A predetermined precise amount of movement or looseness of the pre-fabricated flexible jacket covering relative to the transfer cylinder support surface is established in the operative position. Reinforcement strips are stitched onto the gripper, the tail and the operator/gear side edges of the flexible jacket covering for stabilizing the flexible jacket covering and preventing detachment from the transfer cylinder during high speed press operation. At least one side of each reinforcement strip has pressure sensitive adhesive for securing the flexible jacket covering onto the transfer cylinder.
摘要:
An impression cylinder of a sheet-fed offset printing machine for first form and perfector printing has a multiple diameter and includes a dressing disposed on an outer cylindrical surface thereof for carrying a sheet on a previously printed side thereof, the dressing including a foil having a textured surface for supporting the sheet and having a construction for adjusting to and compensating for inequalities of the impression cylinder, the foil being replaceably fastened on the outer cylindrical surface at least at a sheet carrying region thereof.
摘要:
A roll for use in paper making has a surface comprising a porous material in which the press have been sealed by an electrolyte to achieve optimal paper web dewatering capacity, lessen adherence of a paper web to the roll surface, and to improve the corrosion resistance and mechanical strength of the roll coating. A method for making the roll by electrochemical deposition of the electrolyte in the pores of the roll surface is also disclosed.
摘要:
A roll for use in paper making has a surface comprising a porous material in which the press have been sealed by an electrolyte to achieve optimal paper web dewatering capacity, lessen adherence of a paper web to the roll surface, and to improve the corrosion resistance and mechanical strength of the roll coating. A method of making the roll by electrochemical deposition of the electrolyte in the pores of the roll surface is also disclosed.