Abstract: A method for starting up a web-fed printing machine, in which a web to be printed on is guided through at least one printing gap formed by a printing cylinder and a counter printing cylinder of the web-fed printing machine; the printing cylinder accelerates to a print-on speed (Nprint-on) in a position retracted from the web and is applied to the web; and at least during a partial phase of the acceleration of the printing cylinder, the web is stationary or is conveyed at an initial speed (Nin) which is lower than the current speed of the printing cylinder.

Abstract: An inking roller for an inking system has, distributed over the surface on a ink-transferring surface (S), circumferential flutes (3). The longitudinal flutes (4) intersect the circumferential flutes (3) and elevated surface areas as said webs (5) and between the circumferential and longitudinal flutes (3, 4).

Abstract: A device is provided for engaging and/or disengaging a roller with or from a first mating roller. The device includes a second mating roller, with which the roller is engaged, and with a basic unit, with which the roller can be moved to or away from the first mating roller in the circumferential direction of the second mating roller. A process for engaging and/or disengaging a roller of a printing press with or from a first mating roller is provided wherein the roller is engaged with a second mating roller and the roller is guided in the circumferential direction of the second mating roller in the state in which it is engaged with the second mating roller.

Abstract: A clamping device for clamping a flexible packing (2, 3) of a cylinder (1) of a printing press, which cylinder has an axial channel (6) on a jacket surface, the clamping device includes a clamping body (10), which has a surface (S) that forms in the channel (6) with an opposite surface (4) a clamping gap for at least one end of the packing (2, 3) protruding through an opening (7) of the channel (6). A pressing device (13; 14; 10a) presses the clamping body (10) and the opposite surface (4) against each other with a clamping force (F). A mounting device (12; 14; 1, 8), which forms a support surface (9; 14?; 9?), touches the clamping body (10) and the clamping body (10) is supported on it.

Abstract: A web-spreading device and a web-spreading process are provided. The web-spreading device, is provided whereby a first web strand being conveyed and a second web strand being conveyed next to the first web strand in a web-processing machine can be offset in parallel to one another in order to set a spread. A frame supports a first deflecting device (5r; 5r?), which forms a first deflection axis for the first web strand (Br), and a second deflecting device (6r; 6r?), which forms a second deflection axis for the first web strand (Br), which deflection axis is the next deflection axis for the first deflection axis in the conveying direction (F). The first web strand (Br) is offset in parallel by wrapping around the deflecting device (5r, 6r; 5r?, 6r?) and the spread (X; X+Y) is thus set in its entirety or in part. At least one of the deflecting devices (5r, 6r; 5r?, 6r?) is mounted adjustably along an adjustment path in the frame (2) in order to set the spread (X; X+Y).

Abstract: A device for deflecting a web has at least one turning bar (1; 2) that can be shifted. A first turning bar holding device (11a, 11b; 11a, 11b, 11c) is connected with an axial end of the turning bar. A second turning bar holding device (12) is connected with the other axial end of the turning bar. A first guide is provided, along which the first turning bar holding device (11a, 11b; 11a, 11b, 11c) is guided movably. A second guide (22) is provided, along which the second turning bar holding means (12) is guided movably. An adjusting device (19, 20) is provided, by which at least one (11a, 11b; 11a, 11b, 11c) of the turning bar holding means is adjustable along its guide (21) in order to position it (11a, 11b; 11a, 11b, 11c) for shifting the turning bar (1; 2).

Abstract: A process is disclosed for determining cutting positions of web strands (B1, B2), which are brought together into a strand to be bound (H1) in a rotary printing press and cross-cut. A measured value for the cutting position of the web strands (B1, B2) is formed in the strand to be bound (H1) and one individual strand measured value for the cutting positions of the web strands (B1, B2) is recorded for each of the web strands (B1, B2) before bringing together. The cutting positions of the web strands (B1, B2) are determined from the individual strand measured values and the common measured value recorded for the web strands (B1, B2) of the strand to be bound (H1) in the strand to be bound (H1).

Abstract: A roll for a printing press has at least two circular partial areas (25, 33) made of an ink-friendly material and at least one circular partial area (23, 34) made of an ink-repellent material, which is arranged between the at least two circular partial areas (25, 33) made of ink-friendly material. A process is provided for manufacturing such a roll, wherein at least two annular structures (25, 33) made of an ink-friendly material and, located between these annular structures, at least one annular structure (23, 34) made of an ink-repellent material are formed on a blank roll body (20, 30).

Abstract: A process is provided for obtaining or refreshing the illustration of a printing form, preferably in wet-offset printing. Instead of clearing the illustration over the entire area, the printing form is acted on during the production. For this, a processing agent can act on the printing form in different areas for images. A processing agent preferably acts over the entire area of the printing form, in which case the layer of ink located on the printing form leads to a locally different intensity of the action, corresponding to the illustration of the printing form. Photocatalytic effects are preferably used. A hydrophilization of non-image areas is brought about by irradiation in the presence of water molecules. Since printing ink containing little water lies on the image areas, hydrophilization cannot occur on the image areas. Thus, in spite of the entire-area action on the printing form, an image-related refreshing or obtaining of the illustration is automatically achieved.

Abstract: A device for supporting a web with a holding device (5), a first spring element (14), which generates a first spring force directed roughly against the force caused by the load in case of a loading of the holding device (5) and with a second spring element (16), which generates a second spring force acting roughly in the direction of the force caused by the loading of the holding device (5).

Abstract: A wet offset printing form has atop layer containing a photocatalytically and thermally modifiable material. The material can be brought photocatalytically into a hydrophilic state by irradiation with light and into a lipophilic state by heating. The hydrophilic state forms a surface that can be illustrated and the lipophilic state forms an illustrated surface. The top layer of the wet offset printing form may contain absorption centers for irradiation, especially for laser radiation in the NIR range, with which heating of the top layer in the pattern of an image is brought about.

Abstract: A process is provided for measuring the inking in web printing, wherein a measuring head or a plurality of measuring heads performs/perform an integrating measurement of the light remitted from a printed web of material in the direction of run of the web of material. A device is also provided for measuring the inking in web printing. The device includes at least one sensor element for receiving light, which is remitted by a running, printed web of material, an adding or integrating device, which is connected to a sensor element, of which there is at least one, in order to determine the intensity of the light received and a control, which presets the duration of reception of light and/or the duration of the addition or integration by means of the adding or integrating means for an adding or integrating intensity measurement of the remitted light in the direction of run of the web.

Abstract: A wet offset printing form has a top layer containing a photocatalytically and thermally modifiable material. The material can be brought photocatalytically into a hydrophilic state by irradiation with light and into a lipophilic state by heating. The hydrophilic state forms a surface that can be illustrated and the lipophilic state forms an illustrated surface. The top layer of the wet offset printing form may contain absorption centers for irradiation, especially for laser radiation in the NIR range, with which heating of the top layer in the pattern of an image is brought about.

Abstract: A draw roller for pulling web-shaped material with at least one pull ring arranged on at least one part of the circumference of the roller. The at least one pull ring can be displaced on the draw roller.

Abstract: A process and device are provided for setting the crop mark for and/or in a print production, in which prints are continuously printed on a web. At least one printing couple for printing on a web is provided. A lengthwise cutting device cuts the web into a first web strand and at least one second web strand. A converging device is provided for converging the first web strand with at least the second web strand and/or at least one other web strand to form a bundle. A cross-cutting device cuts the bundle. A crop mark setting device is provided with at least one deflecting device for each of the web strands of the bundle. The deflecting devices form a deflection axis for the web strand of the bundle, the web strand being associated with it. The deflecting device is mounted movably such that the particular deflection axis formed is adjustable at right angles to an axial direction by a maximum adjusting path length.

Abstract: A roll changer for a web-treating or web-processing machine, or a web-fed printing press is provided. The roll changer includes a first roll arm (4) with a first axle journal (8), which can be pivoted about a pivot axis (3), and a second roll arm (5) with a second axle journal (8), which can be pivoted about the pivot axis (3) together with the first roll arm (4). The axle journals (8) form a rotary mount for a web roll (10) taken up between the roll arms (4, 5). A first stripper (9) is assigned to the first axle journal (8) and can be moved in relation to the first axle journal (8), in order to strip the web roll (10) from the first axle journal (8). A drive (11a-11d) is provided for pivoting the roll arms (4, 5) and moving the first stripper (9).

Abstract: A process and device are provided for determining the position and/or the shape of at least one mark on a web to be printed on. The position and/or the shape of the at least one mark in the image to be printed is determined with the use of prepress data. The device for determining the position and/or the shape of at least one mark on a web to be printed on includes an input device for entering prepress data and a device for determining position data and/or shapes for a mark based on the prepress data entered.

Abstract: The present invention pertains to a lens system for a laser for illustrating a printing form with at least one spherical lens. The spherical lens may be arranged between the laser and the printing form, in order to bundle laser light emitted by the laser. At least one aspherical lens is arranged between the spherical lens and the printing form, for focusing or converging the laser light onto a desired spot. A process is also provided for illustrating a printing form. A laser for exposing an area element of predetermined width and height is operated continuously. The laser light generated by the laser is focused by the lens system according such that a strip (L) is generated which has a width that approximately corresponds to the width of the area element to be exposed. The strip has a height (H) that is smaller than the height of the area element to be exposed.

Abstract: A web expanding device for or in a web-processing machine, especially a web-fed rotary printing press includes a frame and a cutting device (4) for longitudinally cutting a web (B) into a left-hand web strand (Bl) and a right-hand web strand (Br). A first deflecting device (5l) for the left-hand web strand (Bl) is provided along with a second left-hand deflecting device (6l) for the left-hand web strand (Bl), which is arranged after the first left-hand deflecting device (5l) in the direction of web delivery (F). A first right-hand deflecting device (5r) for the right-hand web strand (Br), which points toward the first left-hand deflecting device (5l) is provided along with a second right-hand deflecting device (6r) for the right-hand web strand (Br), which is arranged after the first right-hand deflecting device (5r) in the direction of web delivery (F) and points toward the second left-hand deflecting device (6l).

Abstract: A rotary printing machine, in particular in a reel-fed newspaper offset rotary press is provided with a device for correcting the web width. A rotatively mounted rotational body configuration is arranged in the path of the web between two print printing nips (2, 3) on one side of the web. The rotational body configuration (5; 6) has a wave-like profile that is transverse to the running direction of the web.