Abstract: There is provided a method of providing color matching between two output devices, which includes providing gradation matching between the two output devices, and providing color matching between the two output devices after providing the gradation matching.

Abstract: A sheet-fed printing press includes a printing section for printing on sheets of paper fed from a sheet feeding section, and a surface treating section for treating surfaces of the sheets of paper by pressing transfer films respectively onto the sheets of paper printed at the printing section. The surface treating section includes a downstream cylinder having a gripper for gripping each of the sheets of paper fed from an upstream cylinder for conveying the sheets of paper printed and fed thereto, and a film transfer mechanism that presses the transfer films respectively onto the sheets of paper on the downstream cylinder while at the same time conveying the transfer films in the same direction as the direction of the downstream cylinder.

Abstract: An overlap detection apparatus mounted to a printing press includes a sheet detection sensor for detecting whether a portion of the sheets passing a given position is a non-overlapping portion or an overlapping portion; a signal output section for outputting an overlapping signal on the basis of the detected results of the sheet detection sensor, in which the overlapping signal takes a first form for the overlapping portion and takes a second form for the non-overlapping portion; and a determination section for determining that the sheets of paper are being correctly conveyed while each being displaced by a given amount from an upstream sheet of paper in the conveying direction and overlapping the same when a portion of the overlapping signal taking the first form is equal to a given reference portion, and determines that the sheets of paper are not being correctly conveyed when the portion of the overlapping signal taking the first form is not equal to the given reference portion.

Abstract: A data creating device for printing plates optimizes image data for use in forming printing plates using a printing press having a feed reel for feeding printing film onto a circumference of a plate cylinder from a circumference recess formed in the plate cylinder, a rewind reel for rewinding the printing film fed from the feed reel so as to draw the printing film from the circumference of the plate cylinder, and an image forming device for forming an image on the printing film placed on the circumference of the plate cylinder. The data creating device detects a maximum position of the image data in a plate transfer direction. The data creating device deletes data downstream of the maximum position in the plate transfer direction, thereby creating optimized image data. The data creating device stores the optimized image data in a memory to be used in forming the printing plate.

Abstract: There is provided a printing press that can guide a printing plate, which is held in clamped relationship with the clamping gripper, so as to be mounted on the plate cylinder with accuracy, while guiding a printing plate in the plate discharge direction with accuracy, as well as preventing deterioration of the reliability for a long time. A printing plate guide plate having a leading end provided with guide rollers and guide blocks guides a printing plate when it is supplied to a plate cylinder and discharged therefrom. A pivotally moving plate auxiliarily guides the printing plate when it is guided by the printing plate guide plate.

Abstract: In an apparatus for controlling the amount of ink to be supplied to a printing plate mounted on a printing cylinder, which ink is reserved in an ink fountain and transferred by an ink transfer roller to the printing plate via plural ink rollers, where an average value of image area ratios is not less than a given value, a normal mode is selected so as to preset, prior to starting printing operation, each of the opening degrees of the plural ink fountain keys based on a main conversion curve and the number of times at which the ink transfer roller touches the ink fountain roller per a given number of rotations of the plate cylinder to a given touching frequency, and where the average value is less than the given value, a small image mode is selected so as to preset, prior to starting printing operation, each of the opening degrees of the plural ink fountain keys based on a modified conversion curve and the number of times at which the ink transfer roller touches the ink fountain roller to a touching frequency

Abstract: In a printing press, ink fountain keys are disposed to be movable toward and away from an ink fountain roller of an ink fountain to allow them to have a predetermined gap therebetween and hence the amount of ink to be fed to a downstream roller to be determined. The ink fountain roller is rotated while ink is prevented from being fed to the downstream roller. At least one of the ink fountain keys is moved so as to allow the at least one of the fountain keys to change a position thereof relative to the ink fountain roller of the ink fountain with time. With this arrangement, it is possible to improve an ink kneading effect produced by the rotation of the ink fountain roller without the necessity to manually knead ink in the ink fountain by the operator and the necessity to provide any ink kneading device or unit independently of the printing press.

Abstract: There is provided a sheet-fed printing press that is capable of rapidly performing printing preparatory work for more secured double sheet detection. A double-sheet-detector control part judges whether an ultrasonic double sheet detector outputs double sheet detected signal during test printing or during feeding a first printing sheet of successively fed printing sheets in large quantity or successive printing. Where double sheet detected signal was output, it is judged that the detection made by the ultrasonic double sheet detector is erroneous so that the double-sheet-detector control part switches to a photoelectric double sheet detector to be employed as a double sheet detector for use in large quantity or successive printing.

Abstract: A printing press can securely supply a printing plate while bringing a printing plate into alignment with a plate cylinder in an axial direction of the plate cylinder, as well as omitting the necessity to return the plate registration of the plate cylinder to the original point. The printing press includes a printing plate guide plate that is pivotally movably mounted in an opening of a body cover that covers the plate cylinder, a sucker for holding a printing plate by suction so as to pull the same towards the printing plate guide plate. The sucker is disposed so as to be movable towards a clamping gripper disposed on the plate cylinder and in a direction parallel to an axis of the plate cylinder.

Abstract: A method of controlling an ink transfer roller is provided. This method achieves stabilized printing quality by evenly distributing ink transfer actions of the ink transfer roller for the number of rotation of a plate cylinder. The ink transfer action of an ink transfer roller is controlled based on the fact whether a value obtained by setting the value of C after calculation as a hysteresis value and adding the number ratio thereto exceeds a predetermined basic value or not, thereby allowing the ink transfer roller to perform ink transfer actions evenly at the number ratio set by an operator. With this method, unevenness in printing quality can be prevented.

Abstract: An electric power tool includes a housing, an inner case and a hammer case. The housing receiving a motor has a pair of half portions. The inner case receives a planetary gear train. An input side of the planetary gear train is connected to a drive shaft of the motor. The housing receives the inner case. The hammer case receives a hammer unit. An input side of the hammer unit is connected to an output shaft of the planetary gear train to convert rotation of the output shaft of the planetary gear train into an intermittent striking power outputted from an output shaft of the hammer unit. The hammer case receives the inner case having recesses. The hammer case has elongated holes aligned with the recesses. Each half portion has bosses engaging with the elongated holes of the hammer case, which are aligned with the recesses of the inner case.

Abstract: A printing press which can limit increase in the entire size of a plate discharge device while moving a printing plate in a plate discharge direction by a sufficient distance is provided. The plate discharge device is provided with a cylinder device. A first clamping roller is mounted via a pinion to a mounting member mounted to a rod of the cylinder device. A rack is disposed to be meshed with the pinion. A second clamping roller is provided to the mounting member so as to be movable closer to and away from the first clamping roller via a switching means.

Abstract: An electric power tool includes a housing, an electric power, a trigger, a trigger-limitation device and a switching device. The housing receives the electric power unit having an output shaft. The trigger is slidably mounted on the housing so as to control operation of the electric power unit. The trigger-limitation device is mounted on the housing so as to be movable between a limited position and an unlimited position. The trigger-limitation device comes into contact with the trigger to limit a stroke of the trigger, when being kept in the limited position, and not coming into contact with the trigger to impose no limitation to the stroke of the trigger, when being kept in the unlimited position. The switching device is provided on the housing in a different place from the trigger-limitation device. The switching device operates the trigger-limitation device to move between the limited position and the unlimited position.

Abstract: A method of controlling an ink transfer roller is provided. This method achieves stabilized printing quality by evenly distributing ink transfer actions of the ink transfer roller for the number of rotation of a plate cylinder. The ink transfer action of an ink transfer roller is controlled based on the fact whether a value obtained by setting the value of C after calculation as a hysteresis value and adding the number ratio thereto exceeds a predetermined basic value or not, thereby allowing the ink transfer roller to perform ink transfer actions evenly at the number ratio set by an operator. With this method, unevenness in printing quality can be prevented.

Abstract: In a drying apparatus equipped with a light source to dry a drying matter of a print by irradiating light of the light source to the print, a correlation between information relating to the time for which the light source is lit and information relating to the amount of light of the light source is preset. Then, the information relating to the elapsed time for which the light source is lit during the light source is lit is detected so that light of the light source is controlled to a constant amount, regardless of the elapsed time for which the light source is lit, based on information relating to a reference amount of light, which information is obtained from the preset correlation between the information relating to the time for which the light source is lit and the information relating to the amount of light with reference to the information relating to the elapsed time at the time of the detection.

Abstract: There is provided a sheet-fed printing press that is capable of rapidly performing printing preparatory work for more secured double sheet detection. A double-sheet-detector control part judges whether an ultrasonic double sheet detector outputs double sheet detected signal during test printing or during feeding a first printing sheet of successively fed printing sheets in large quantity or successive printing. Where double sheet detected signal was output, it is judged that the detection made by the ultrasonic double sheet detector is erroneous so that the double-sheet-detector control part switches to a photoelectric double sheet detector to be employed as a double sheet detector for use in large quantity or successive printing.

Abstract: A sheet-fed printing press includes a printing section for printing on sheets of paper, a sheet discharge section for discharging sheets of paper printed at the printing section from the printing section, a see-through part provided on the upper side of the sheet discharge section so that the inside of the sheet discharge section can be visually observed therethrough, and a color check table, on which a printed sheet of paper picked up from the sheet discharge section is placed for color checking thereof The color check table is located so as to at least partially cover the see-through part from above. The color check table is designed to be movable in a sheet transfer direction so that an area of the see-through part exposed to the outside on the downstream side of the color check table is increased as the color check table is moved towards an upstream side of the sheet transfer direction.

Abstract: An electric power tool includes a housing, an inner case and a hammer case. The housing receiving a motor has a pair of half portions. The inner case receives a planetary gear train. An input side of the planetary gear train is connected to a drive shaft of the motor. The housing receives the inner case. The hammer case receives a hammer unit. An input side of the hammer unit is connected to an output shaft of the planetary gear train to convert rotation of the output shaft of the planetary gear train into an intermittent striking power outputted from an output shaft of the hammer unit. The hammer case receives the inner case having recesses. The hammer case has elongated holes aligned with the recesses. Each half portion has bosses engaging with the elongated holes of the hammer case, which are aligned with the recesses of the inner case.

Abstract: An electric power tool includes a housing, an electric power, a trigger, a trigger-limitation device and a switching device. The housing receives the electric power unit having an output shaft. The trigger is slidably mounted on the housing so as to control operation of the electric power unit. The trigger-limitation device is mounted on the housing so as to be movable between a limited position and an unlimited position. The trigger-limitation device comes into contact with the trigger to limit a stroke of the trigger, when being kept in the limited position, and not coming into contact with the trigger to impose no limitation to the stroke of the trigger, when being kept in the unlimited position. The switching device is provided on the housing in a different place from the trigger-limitation device. The switching device operates the trigger-limitation device to move between the limited position and the unlimited position.