Abstract: A coating device for supplying a liquid to a substrate, particularly in the form of an optionally printed web, foil, strip or sheet, comprises a reservoir for holding a quantity of liquid. A coating assembly is provided which is able and configured to take liquid from the reservoir and transfer it to the substrate. A supply delivers the liquid into the reservoir during operation. The supply is controllable and is able to lead a constant liquid flow into the reservoir. The reservoir is provided with a level detector capable and configured to detect a liquid level in the reservoir. Provided between the level detector tools and the coating assembly is a control which controls the coating assembly during operation on the basis of a detection (LS) of the liquid level in the reservoir in order to maintain the liquid level at a fixed value.

Abstract: A printing material web processing machine, in particular a web-fed rotary offset press, has at least one press cylinder for printing the web, a dryer disposed downstream of the press cylinder, which guides the web along a path, and at least a first pull roll disposed downstream of the dryer to convey the web along the path with a given tensile stress. The web processing machine further has a first apparatus disposed downstream of the press cylinder and upstream of the dryer for separating the web from the press cylinder, and a second apparatus for driving the first pull roll, which drives the first pull roll at a rotational speed that is reduced as compared with the rotational speed of the press cylinder.

Abstract: A feeding station for a splicer of a rotary offset printing press is provided. The feeding station includes a feeding device for feeding a paper roll into a splicer; an unpack station for unpacking a paper roll; and a buffer station for storing an unpacked paper roll. The feeding station includes an unpack conveyor leading from the unpack station to the feeding device; and a buffer conveyor leading from the buffer station to the feeding device. The feeding device includes a feeding carriage having a core container for holding two or more cores. A corresponding method is also provided.

Abstract: A device for preparing a liquid mixture that is to be applied to a printing material is provided. The device includes a first reservoir containing a first ingredient of the liquid mixture, a supply source for a second ingredient of the liquid mixture, a mixing tank for receiving the at least first and second ingredients and for mixing the ingredients to obtain the liquid mixture, and supply lines to convey the first ingredient and the second ingredient from the first reservoir and the supply source to the mixing tank. The first ingredient includes less than 60, preferably less than 50, and most preferably less than 25 weight % of water, and in particular is an essentially waterless ingredient. A method is also provided.

Abstract: A device for applying a paper web onto a paper reel is provided, including a web application roller mobile between a guiding position of the paper web and an application position of the paper web onto the paper reel, and an actuator for moving the web application roller between its two positions. The device includes a locking mechanism adapted for locking the web application roller in its application position. The device may be used in reel changers of web-fed offset printing presses.

Abstract: This device for applying a moistening liquid to a paper web comprises a liquid applicator roller (44, 46) for applying the moistening liquid (38) on the paper web (18). The liquid applicator roller comprises an application surface (60), and is characterized in that the application surface (60) is formed of a material capable of creating a corona effect on the paper web by discharge of static electricity between the surface and the paper web (18). Application to paper web dryers of rotary offset presses.

Abstract: A printing press is provided. The printing press includes at least one printing unit for printing a web-shaped printing material and a device for applying a liquid mixture of a silicone oil concentrate and at least water to the web-shaped printing material. The device includes reservoir for the silicone oil concentrate, a supply source for the water, a mixing tank for the silicone oil concentrate and the water, an applicator for transferring the liquid mixture onto the printing material. The applicator has at least one container for the liquid mixture. The device also includes a buffer tank for the silicone oil concentrate separate from the mixing tank. The buffer tank receives the silicone oil concentrate from the reservoir. The printing press also includes a cooling roll for the web-shaped printing material.

Abstract: A feeding station for a splicer of a rotary offset printing press is provided. The feeding station includes a feeding device for feeding a paper roll into a splicer; an unpack station for unpacking a paper roll; and a buffer station for storing an unpacked paper roll. The feeding station includes an unpack conveyor leading from the unpack station to the feeding device; and a buffer conveyor leading from the buffer station to the feeding device. The feeding device includes a feeding carriage having a core container for holding two or more cores. A corresponding method is also provided.

Abstract: A device for applying a paper web onto a paper reel is provided, including a web application roller mobile between a guiding position of the paper web and an application position of the paper web onto the paper reel, and an actuator for moving the web application roller between its two positions. The device includes a locking mechanism adapted for locking the web application roller in its application position. The device may be used in reel changers of web-fed offset printing presses.

Abstract: A web-fed rotary press (10) for printing on a web substrate (12) using heat-set inks in an offset printing process, having at least one print unit (14) and one dryer (16), and at least one additional device (18) for inputting heat into the web substrate (12) which is positioned upstream from the print unit (14), in particular. Fluting in the web-fed rotary press (10) may be minimized by supplying heat to the web substrate (12) at least at one location along the path (36) through the web-fed rotary press (10), in particular before the printing operation.

Abstract: A printing press is provided. The printing press includes at least one printing unit for printing a web-shaped printing material and a device for applying a liquid mixture of a silicone oil concentrate and at least water to the web-shaped printing material. The device includes reservoir for the silicone oil concentrate, a supply source for the water, a mixing tank for the silicone oil concentrate and the water, an applicator for transferring the liquid mixture onto the printing material. The applicator has at least one container for the liquid mixture. The device also includes a buffer tank for the silicone oil concentrate separate from the mixing tank. The buffer tank receives the silicone oil concentrate from the reservoir. The printing press also includes a cooling roll for the web-shaped printing material.

Abstract: A flap projecting from a glue joint between two paper strips after an on-the-fly supply roll change is shortened by continuously displacing the strips in a straight line, in a travel direction, and at a travel speed along a path such that the flap lies flatly against an outer face of the strips and engaging at least a part of a separating device against the outer face in the path. At least the part of the separating device engaging the strip is displaced in the travel direction at a speed greater than the travel speed such that, when the separating device engages the flap, the flap is bowed out away from the outer face downstream of the separating device. A blade is juxtaposed with the outer face of the strip immediately downstream of the separating device such that the bowed out flap engages and is cut by the blade.

Abstract: An applicator roller includes a roller jacket having an outer cylindrical surface for picking up a liquid and, at least to some extent, for transferring the liquid. The roller jacket is formed with at least one perforation through which excess liquid is guidable into a hollow interior of the applicator roller. An assembly of an applicator roller and a rotating element disposed downstream therefrom in a liquid travel direction, a cooling roller stand integrated into a dryer and having the applicator roller, a cooling roller stand disposed immediately downstream from a dryer and having the applicator roller and a printing press having the applicator roller, are also provided. A method is provided for coating a material web.

Abstract: An apparatus for remoistening a product web includes at least one applicator for applying a remoistening agent to a printed and at least partly dried product web. A device increases the temperature of the remoistening agent so that contaminants are removed by vaporization from the remoistening agent. A combination of the apparatus with a dryer and a cooling device and a method for remoistening the product web are also provided.

Abstract: A method and apparatus for preparing the start of a material web of a stock roll (5) in a roll exchanger comprises the steps of bringing a surplus roll (20) removed from a stock-roll holder (3), which surplus roll (20) is incorporated in a frame of web-takeup (11) and to which surplus roll (20) an adhesive is applied, into contact with the material web of the stock roll (5), taking up the material web from the stock roll (5) on the surplus roll (20), winding up a length of the material web from the stock roll (5) on the surplus roll (20), winding up a length of the material web of the stock roll (5) on the surplus roll (20) and severing the material web between the portion of the material web wound on the surplus roll (20) ant the stock roll (5). The roll exchanger is provided with means including, in particular, a web-takeup device (11), in which a surplus roll (20) is or can be mounted so that it can rotate, with which the method can be carried out.

Abstract: In a method for preventing the occurrence of an explosive state in a gas mixture, especially of solvents in air, in an essentially confined space, virtually complete oxidation of at least part of the gas mixture taking place, either the temperature difference .DELTA.T between the temperatures of the gas mixture before and after the oxidation is determined, and if the temperature difference .DELTA.T is greater than a maximal permissible temperature increase .DELTA.T.sub.max, safety measures are taken, or the temperature T.sub.1 of the gas mixture before the oxidation and the temperature T.sub.2 of the gas mixture after the oxidation are measured, and the measured temperatures T.sub.1 and T.sub.2 are compared with a minimum temperature T.sub.min before oxidation of the gas mixture and a maximum temperature T.sub.max after oxidation of the gas mixture, the difference between T.sub.max and T.sub.min being less than, or equal to, the maximal permissible temperature increase .DELTA.T.sub.

Abstract: A method for measuring and regulating the elongation of a moving material web that includes the steps of measuring the length change or speed change occurring over a drive roller, from which the elongation is calculated and, if it deviates from the desired elongation, the web tension is corrected in order to set the elongation. Such a method is preferably used in a web tension device disposed between a roll exchanger and a printing press. The web tension is preferably adjusted through the use of a dancer roller, whose force exerted on the material web is regulated by a controlled dancer cylinder.

Abstract: An auxiliary transport device for transporting a chain part of a web conveying mechanism, which mechanism guides the start of a web of material through a processing device, comprises a transport device, having a length of at least the transit path of the web of material, for engaging and moving the chain part of the web conveying mechanism, as well as a drive device arranged outside the device for moving the transport device and guide, which are arranged along the transit path of the web of material, for guiding the transport device and the chain part through the device.

Abstract: The invention relates to a drier for printed strips, comprising a housing through which the printed strips are carried, means for supporting the strip, a feed means for feeding heated gas to the housing, a discharge means for discharging gas from the housing, and a recirculation device for recirculating the gas present in the housing during standstill of the strip, wherein the recirculation device has been adapted for maintaining recirculation parallel to the direction of movement of the strip. As a consequence of these features the temperature prevailing in the space in the housing is kept substantially uniform during standstill of the strip. By maintaining the operating temperature there is hardly any need for temperature increase to take place during the start-up procedure, so that this procedure will proceed quickly.

Abstract: A device for drying strips of printed material includes a drying chamber through which the strips of printed material are carried, the drying chamber being divided into at least two sections by walls and being as gas-tight as possible in relation to the environment, at least one burner connected to the drying chamber by an outlet duct for discharging at least a portion of combustion gases and connected to the drying chamber by a feed duct for feeding to the burner gases saturated with solvents and structure for feeding fresh air to a first of the at least two sections being located at a first outer end of the drying chamber. The feed duct is connected to a second of the at least two sections.