摘要:
A variable cutoff printing press is provided including a first plate cylinder (18) with a first plate disposed about the first plate cylinder (18) and having a first image portion. A first blanket cylinder (20) transfers the first image portion to a web (30) at a first location. A second plate having a second image portion is disposed about the second plate cylinder (22). A second blanket cylinder (24) transfers the second image portion to the web (30) at a second location. An impression cylinder (16) contacts the first blanket cylinder (20) and the second blanket (24) cylinder via the web (30). The first image portion and the second image portion form one continuous image having an image cutoff length. A method of printing an image on a web (30) with a cutoff using a variable cutoff offset printing press is also provided.
摘要:
Method for starting up a web-fed rotary printing press, in which a) a web (B) which is to be printed is guided through at least one press nip which is formed by an impression cylinder (3) and a back-pressure cylinder (3) of the web-fed rotary printing press, b) the impression cylinder (3) is accelerated to a thrown-on speed (N Druck-An ) in a position, in which it is thrown off from the web (B), and is then thrown onto the web (B), c) the web (B) is stationary at least during a part phase of the acceleration of the impression cylinder (3) or is conveyed at an initial speed (N Ein ) which is slower than the current speed of the impression cylinder (3).
摘要翻译:一种用于启动一种卷筒纸轮转印刷机,其中:a)要被打印的纤维网(B)的压力辊隙方法通过至少一个压力缸(3)和压印滚筒(3)形成所述卷筒纸轮转印刷机中的B)中的压力的一个汽缸(3)通过 所述幅材(B)停放位置上的压力上速度(N 压力 SUB> -An)期间的一个局部相至少加速到幅材(B)中采用,c)该纤维网(B) 印刷滚筒(3)的加速是静止的,或者与印刷滚筒的当前速度(3)相比较,促进较低的初始速度(N A SUB>)。
摘要:
According to an exemplary embodiment of the present invention, a method for operating a multi-unit printing arrangement, including multiple individual motors is provided. The method comprises the steps of operating the multi-unit printing arrangement, stopping the multi-unit printing operation by braking the multiple motors in stop operations, and staggering impression throw operations for individual units by a preselected time delay between commencement of each impression throw operation, a duration of the time delay between commencement of sequential impression throw off operations being selected to be of sufficient duration such that there is no overlap of large torque disturbances experienced at the multiple motors.
摘要:
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Betreiben einer Druckmaschine mit folgenden Merkmalen: -die Ermittlung des Schwingungsverhaltens zumindest eines Druckzylinders (3) der Druckmaschine, -das Vermeiden oder Unterdrücken von unerwünschten Schwingungen wie Resonanzschwingungen durch Maßnahmen im Bereich der diese Schwingungen auslösenden kritischen Frequenzen Beim Betreiben einer solchen Druckmaschine treten unerwünschte Schwingungen auf, die Qualitätseinbußen in Bezug auf das Druckbild verursachen. Die Aufgabe der vorliegenden Erfindung besteht daher darin solche Qualitätseinbußen zu reduzieren. Die Aufgabe wird gelöst durch: -die gezielte Beaufschlagung des Antriebes (2) des zumindest einen Druckzylinders (3) der Druckmaschine mit einem anregenden Signal des Leistungsstellers (9), um Schwingungen des Druckzylinders (3) hervorzurufen, -die Ermittlung kritischer Frequenzen in dem Eigenfrequenzspektrum des zumindest einen Druckzylinders (3) in der Druckmaschine an Hand der hervorgerufenen Schwingungenvorzunehmen. Es werden auch eine Druckmaschine und ein Datensatz zur Durchführung des vorstehend beschriebenen Verfahrens beansprucht.
摘要:
According to an exemplary embodiment of the present invention, a method for operating a multi-unit printing arrangement, including multiple individual motors is provided. The method comprises the steps of operating the multi-unit printing arrangement, stopping the multi-unit printing operation by braking the multiple motors in stop operations, and staggering impression throw operations for individual units by a preselected time delay between commencement of each impression throw operation, a duration of the time delay between commencement of sequential impression throw off operations being selected to be of sufficient duration such that there is no overlap of large torque disturbances experienced at the multiple motors.