Screen Holdings Co., Ltd.

Dainippon Screen Mfg. Co., Ltd.

Susumu Takahashi

Tetsuya Ishida

Seiya Nomura

Tomoyasu Okushima

Satoshi Yasuda

Hiroyuki Kataoka

Mitsuru Tanemoto

Toru Kawada

Osamu Morizono

Shiro Kitawaki

Shoji Kakimoto

Toshio Tamura

Asuka Muramatsu

Hiroshi Nishide

Ryuzo Tokimasa

Kensuke Usui

Masahiko Soma

A printing apparatus is achieved that has an auto-splice function and is capable of performing, when roll paper is replaced, suitable maintenance taking into account a print process scheduled to be executed after replacement of the roll paper. When a splicer replaces, regarding the roll paper to be used, the preceding roll paper with the subsequent roll paper, a print control unit controls an operation of a printing unit such that an inspection pattern is printed at a tail of continuous paper unwound from the preceding roll paper, and a maintenance content control unit determines maintenance content for an inkjet head in accordance with a criterion suitable for printing on continuous paper unwound from the subsequent roll paper based on an inspection result obtained by inspection of a print image for the inspection pattern.

Printing apparatus and maintenance method therefor

The maintenance unit is configured to be movable in the X direction, and moves between the facing position La facing the ejection head and the separation position Lb away from the ejection head in the X direction. Provided is the imaging part configured to image the imaging range Ri provided on the side of the separation position Lb relative to the facing position La in the X direction and the imaging part images at least part of the maintenance unit which overlaps the imaging range Ri to acquire the unit image I. In other words, the unit image Irepresenting the condition of the maintenance unit can be acquired by the imaging part.

Printer and printing method

When a printing interruption cause occurs during printing of an image on a printing medium, printing of a page being printed is completed, and further only a position mark is printed on a printing resumption page. Then, a printing unit is stopped, and a conveyance speed is decelerated to stop conveyance of the printing medium. Next, the printing medium is rewound so that printing is resumed from the printing resumption page. Thereafter, the conveyance speed is accelerated to a predetermined speed, and printing is resumed from the printing resumption page on which the position mark is printed.

Printing device and printing system

A printing system, including a printing apparatus that sends a print paper after printing to a post-processing machine and a web buffer that temporarily holds a print paper after printing, is provided with: a required print time calculation unit that calculates a required print time for each job; an increase and decrease amount calculation unit that calculates an increase and decrease amount of a consumption amount of the buffer per set for each job on the basis of a difference between a minimum processing time required for a process in a post-processing machine and the required print time; a predicted value calculation unit that obtains a predicted value of the consumption amount of the web buffer by accumulating increase and decrease amounts; and a conveyance control unit that controls a conveyance speed of print paper on the basis of the predicted value.

Printing system and printing method

A printing system is provided with a dummy data insertion unit configured to insert dummy data into print data based on waiting time occurring when post-processing is performed by a post-processing device (for example, a collating machine). In a printing unit, a dummy page is printed on the basis of the dummy data. A dummy page removing unit configured to remove a dummy page from printed printing paper so that the dummy page is not supplied to the post-processing device is provided between the printing device and the post-processing device.

Printing system for continuous processing from printing to binding and printing method thereof

A printing apparatus for printing on a front surface of a printing medium, and thereafter printing on a back surface of the printing medium. The apparatus includes the following elements: a front surface print head for printing a front surface image based on front surface image data, over a surface page length on the front surface of the printing medium; a back surface print head for printing a back surface image based on back surface image data, on the back surface of the printing medium; a data corrector for creating corrected front surface image data by correcting an image size of the front surface image data based on elasticity information in the transport direction; and a printing controller for causing printing based on the corrected front surface image data, and controlling the back surface print head to perform printing on the back surface.

Printing apparatus

A printing apparatus configured to print on a continuous sheet to be cut into a plurality of cut sheets at a plurality of cutting positions while being conveyed, includes a conveyance mechanism configured to convey the continuous sheet, and a print head provided so as to face a conveyance path for the continuous sheet in the conveyance mechanism and configured to sequentially print a plurality of cutting marks indicating the plurality of cutting positions on the continuous sheet being conveyed by the conveyance mechanism, in which, from between front end portions and rear end portions of each of the pages in a conveyance direction of the continuous sheet in the conveyance mechanism when printing by the print head is performed, the print head prints the cutting marks on the rear end portions for a plurality of pages on the continuous sheet corresponding to the plurality of cut sheets.

Printing apparatus and printing method

After printing cue marks and front surface images on the front surface of web paper by a printing station, an image data elongation-contraction processor creates corrected back surface image data based on elasticity information, and a printing station prints back surface images based on the corrected back surface image data, on the back surface of the printing medium. At this time, a page interval calculator calculates a page interval from an interval between the cue marks detected by a detector, and a difference computing unit calculates differences between the page interval and image size in a transport direction of the corrected back surface image data. Since these differences indicate shifts of the correction based on the elasticity information, optimal elasticity information can be set by revising the elasticity information with these differences through a setting unit. Consequently, the operator of the apparatus can easily set optimal elasticity information based on the differences.

A printing apparatus includes: a mechanism transporting a print medium; a first sensor outputting a signal indicating the presence or absence of a first mark; a first determining unit determining, on a first surface, a position of a second mark and a print position of an image based on the output signal; a first print head printing the second mark and the image at the determined print positions; a second sensor outputting a signal indicating the presence or absence of the first and second marks; a second determining unit locating a position of a predetermined one of the first and second marks, based on the signal output from the second sensor, and determines, on a second surface of the print medium, a print position of a target image based on the located position of the predetermined mark; and a second print head printing the target image at the determined print position.

A printing apparatus for printing on a front surface of a printing medium, and thereafter printing on a back surface of the printing medium. The apparatus includes the following elements: a front surface print head for printing a cue mark, and printing a front surface image based on front surface image data with reference to the cue mark; a back surface image data corrector for creating corrected back surface image data based on elasticity information in a transport direction after printing of the front surface image; a detector for detecting the cue mark; and a back surface print head for printing the corrected back surface image data on the back surface of the printing medium with reference to the cue mark detected by the detector.

At least one of an upstream drive roller and a downstream drive roller is operated, after printing on web paper and at a time of transportation halt of the web paper, to make a tension value of the web paper between the upstream drive roller and downstream drive roller lower than a tension value at a time of transporting the web paper, so that at least part of contact portions of the web paper in contact with five cooling rollers separate from the five cooling rollers. Consequently, gaps can be produced between the contact portions of the web paper in contact with the five cooling rollers and the five cooling rollers. This can reduce waterdrops due to dew condensation adhering to the web paper. As a result, paper break can be inhibited at a time of starting transportation of the web paper.

Printing apparatus, and elongate printing paper transporting method for printing apparatus

A controller controls printing heads to print a page information mark with black ink to perform line flushing. The printing heads each have a plurality of inkjet nozzles for discharging ink being disposed in parallel in a width direction of web paper. Upon printing the mark, when an overlap region is present in which a mark printable region overlaps a line flushing region with ink other than the black ink, the controller performs control to decrease an ink discharge amount per unit area in the overlap region in the mark printable region to be smaller than that in the mark printable region except for the overlap region and the line flushing region. This causes a decreased total ink discharge amount in the overlap region.

Inkjet printing method and inkjet printing apparatus

An inkjet printing apparatus includes a transport speed detector for detecting transport speed of a printing medium, an inkjet head having a plurality of discharge portions for discharging ink droplets from the discharge portions for printing, and a flushing controller for carrying out discrete flushing from the discharge portions. For an acceleration area of the printing medium where the transport speed detector detects an increase in transport speed before printing, a first discharge rate is set as discharge rate of the ink droplets per unit time for the discharge flushing. For a constant speed area of the printing medium where the transport speed detector detects a substantially constant transport speed during printing, a second discharge rate lower than the first discharge rate is set as discharge rate of the ink droplets per unit time for the discharge flushing.

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Kyoto, Japan

Susumu Takahashi