Dainippon Screen Mfg. Co., Ltd.

Screen Holdings Co., Ltd.

Keisuke Hirai

Ryota Uemura

Takeshi Matsuda

Kenta Hiramatsu

Yoshikuni Takeichi

Takumi Yoshida

Kazuhiko Asada

Akira Murata

Tadashi Syudou

Masaharu Nakagawa

Yoshikazu Matsuno

Kunio Muraji

Shinsuke Yamashita

Shoji Kakimoto

Kouichi Ueno

Masahiko Takeuchi

Both end parts of a cord are fixed to a maintenance mounting frame, and an intermediate part of the cord is laid on a first body-side rotating member, a head-side rotating member and a second body-side rotating member. Here, when a motor is driven, the movement restriction of the cord is released and a movement of a head mounting frame is restricted, whereby only the maintenance mounting frame moves together with a maintenance part while the movement of the head mounting frame is restricted. Further, when the motor is driven, a movement of the cord is restricted and the movement restriction of the head mounting frame is released, whereby only the head mounting frame moves together with a discharge head while a movement of the maintenance part is restricted.

Moving device, moving method and printing apparatus

The wind velocity of the air injected by the air-blow dryersis lower than that of the air injected by the air-blow dryers. That is, since a large amount of moisture remains on the front surface Mof the printing medium M passing through the air-blow dryers, the printing medium M is dried while the flow of the aqueous inks is suppressed by injecting the air at a lower wind velocity. On the other hand, the moisture decreases on the front surface Mof the printing medium M dried by the air-blow dryersand the fluidity of the aqueous inks is reduced. Accordingly, the drying of the printing medium M is promoted by injecting the air at a high wind velocity to the printing medium M passing through the air-blow dryers

Drying apparatus, printing system and drying method for drying printing medium by hot wind

In the air-blow dryers, the back surface Mof the printing medium M is supported by the rollerswhile the hot wind is injected from the nozzlesto the front surface Mof the printing medium M. By extending the printing medium M along the rollers, the evaporation of the moisture can be promoted by the hot wind while the formation of creases of the printing medium M is suppressed against the influence of the temperature distribution caused by the latent heat of the moisture on the printing medium M. After a certain amount of the moisture is evaporated, the temperature of the printing medium M becomes relatively uniform. In the air-blow dryers, the printing medium M is dried by injecting the hot wind to the printing medium M from the nozzlesandfrom both sides.

Drying apparatus, printing system and drying method that inject hot wind from nozzles to surface of recording medium

The printing medium M after color printing is performed on the front surface M(recording surface) by the color printing unitcan be conveyed while the front surface Mand the back surface Mof the printing medium M are inverted twice by the only rollersto(rotary bodies) in contact with the back surface M(non-recording surface) of the printing medium M (inverting conveying part). In this way, without providing air turn bars, a time to convey the printing medium M from the color printing unitto the white printing unitcan be secured while the printing medium M is firmly supported by the rollerstoin contact with the back surface Mof the printing medium M.

Printing apparatus, printing system and printing method

A web drying apparatus, comprises: a blow-drying part which has two blower units arranged on both sides of web which is transferred in a transfer direction, and injects gas onto the web passing through a dry path between the two blower units; a housing which has a sidewall provided with an opening facing the dry path from the transfer direction, through which the web passes in the transfer direction through the opening, and houses the blow-drying part; an exhaust part which is disposed between the sidewall and the blow-drying part in the housing and exhausts gas from the inside of the housing to the outside of the housing; and a rectifying member which is disposed between the blow-drying part and the exhaust part in the housing and faces the web being transferred in the transfer direction.

Web drying apparatus and web drying method

A web drying apparatus, comprises: two blower units which are arranged vertically between an upper dry path and a lower dry path disposed below the upper dry path and at least partially overlap each other when viewed from a vertical direction. One blower unit disposed on an upper side, the other blower unit disposed on a lower side. The lower end part of the one blower unit deviates from the upper end part of the other blower unit in the horizontal direction and protrudes to be lower than the upper end part in the vertical direction.

Web drying apparatus

An image recording device that makes it possible to accurately position images on the front and reverse surfaces of a recording medium even when there is an error in length in the direction of conveyance of the recording medium. The image recording device is equipped with a paper supply part, a paper discharge part, a table movement mechanism, which moves ten tables disposed at regular intervals along a circulation path, an image recording part, which records an image on printing paper on top of the table that is moved by this table movement mechanism, an inversion part, which inverts the printing paper, and a transport mechanism, which transports the printing paper inverted by the inversion part to the paper supply part.

Image recording device

In an image recording apparatus using an inkjet mode, printing paper fed from a paper feederis supplied onto tablesmovable by an endless transport mechanism of a table moving mechanism. After each tableis transferred from the endless transport mechanism to linear motor mechanismsof the table moving mechanism, an image is recorded by an image recorder. Subsequently, the tableis transferred from the linear motor mechanismsto the endless transport mechanism, and then the printing paper on the tableis discharged by a paper discharger

Image recording apparatus

A transport device which accomplishes transport well by means of a linear motor mechanism well even if a chain is elongated. The transport uses the chain in a first transport section, and the linear motor mechanism in a second transport section. A coupling pin of the chain is disengaged from a chain coupling portion of a table when the table is transferred to the second transport section and the coupling pin is brought into engagement with the chain coupling portion again when the table is transferred to the first transport section. A driving speed at which a pair of rotary members are driven by the chain driving mechanism is corrected in accordance with the elongated condition of the chain, based on a count of driving pulses in the chain driving mechanism during the passage of the coupling pin through the second transport section.

Transport device for image recording apparatus and method of correcting transport speed in transport device for image recording apparatus

A sheet-fed printing apparatus includes a delivery section covered with a discharge section cover formed with an opening sized to allow a printed sheet to pass through. Successive printed sheets released from a chain delivery collide against a pair of first sheet-trapping elements in a closed position, and are stacked on a delivery table, with the leading edges of the printed sheets aligned with each other. If a printed sample is needed, an operator opens the first sheet-trapping elements to an open position. In synchronism with the first sheet-trapping elements, a pair of second sheet-trapping elements move to a closed position. A subsequent printed sheet passes through the opening, and stops on the second sheet-trapping elements. Thus, the printed sheet is stopped, with the leading edge thereof projecting outwardly of the sheet-fed printing apparatus. In this state, the operator can take out the printed sample without opening the delivery section cover.

Sheet-fed printing apparatus

A paper feeding apparatus includes a first support member for supporting a central area of a lower surface of printing paper placed on a paper tray, second support members for supporting corner areas of the lower surface of the printing paper, sensors for detecting heights of an upper surface of the printing paper placed on the paper tray, motors rotatable based on signals from the sensors, and lift screws vertically movable by the motors. The second support members are connected to the lift screws to be vertically movable therewith, respectively.

Paper feeding apparatus

A printing apparatus includes a first plate cylinder and a second plate cylinder. Each plate cylinder supports a plate mounted peripherally thereof having two image areas. Four ink feeders contact and feed inks to the image areas on the plate when mounted on the first and second plate cylinders. A first blanket cylinder has a diameter equal to a diameter of the first plate cylinder and is contactable therewith. A second blanket cylinder has a diameter equal to a diameter of the second plate cylinder and is contactable therewith. An impression cylinder having a diameter half the diameter of either the first and second plate cylinders as well as the first and second blanket cylinders, is contactable with the first and second blanket cylinders. A pair of grippers that each hold an end of the printing paper maintain two sheets of printing paper peripherally of the impression cylinder. A paper feed cylinder feeds the printing paper to the impression cylinder. A paper discharge cylinder discharges the printing paper from the impression cylinder after a required printing process. A gripper control mechanism controls the grippers to selectively carry out either one of a first opening and closing operation once for every rotation of the impression cylinder and a second opening and closing operation once for every two rotations of the impression cylinder.

Printing apparatus

A gravure engraving system that capable of successively engraving each of a plurality of gravure cylinders through no intermediary of a manual operation, includes a transport device for transporting a gravure cylinder. The transport device is disposed between an engraving machine for engraving the circumferential surface of a gravure cylinder and a stock device which stores a plurality of gravure cylinders. A predetermined gravure cylinder is selected out of the gravure cylinders stared in the stock device and transported to the engraving machine by the transport device. After the transported gravure cylinder has been automatically set on the engraving machine, the gravure cylinder is engraved. Thereafter, the transport device transports the engraved gravure cylinder to the stock device where the engraved gravure cylinder is stored.

System for engraving a plurality of gravure rolls

A printing apparatus for printing a printing-paper is provided with two plate cylinders each holding a plate, two blanket cylinders coming into contact with the plate cylinders respectively and a single impression cylinder coming into contact with these blanket cylinders. Each plate has two printing areas. The two plate cylinders and the two blanket cylinders have the same diameter, which is twice that of the impression cylinder. The impression cylinder is in contact with a feed cylinder and a removal cylinder, and a reverse cylinder is provided to be in contact with the feed cylinder and the removal cylinder. The printing apparatus performs printing corresponding to one of the printing areas of each plate on a single surface of the printing-paper, reverses the printing-paper, and performs printing corresponding to the remaining printing area of each plate on another surface of the printing-paper. Thus, the printing apparatus can execute two-color printing on both surfaces without exchanging inks, despite its compactness.

A gravure engraving system that capable of successively engraving each of a plurality of gravure cylinders through no intermediary of a manual operation, includes a transport device for transporting a gravure cylinder. The transport device is disposed between an engraving machine for engraving the circumferential surface of a gravure cylinder and a stock device which stores a plurality of gravure cylinders. A predetermined gravure cylinder is selected out of the gravure cylinders stored in the stock device and transported to the engraving machine by the transport device. After the transported gravure cylinder has been automatically set on the engraving machine, the gravure cylinder is engraved. Thereafter, the transport device transports the engraved gravure cylinder to the stock device where the engraved gravure cylinder is stored.

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Kyoto, Japan

Keisuke Hirai