摘要:
An arrangement for controlling a spray distribution of a pulse width modulated spray dampener at a printing press comprises a spray beam (110), a number of spray units (120) fastened to the spray beam, and a housing (300) at least partly enclosing the spray units. The housing is arranged such that at least a part of the sprays emitted from the spray units (120) is screened off from escaping the housing, and an individually formed screen surface (130) is configured to control the spray distribution by screening off spray portions from escaping the housing.
摘要:
A pulsed spray dampener system wherein, during low press speeds, nozzles are controlled to release pulses of dampening fluid having a fixed pulse width and fluid output is adjusted by varying the interval between dampener pulses. During high speed operation, the interval between pulses is fixed and pulse width is varied. Furthermore, the outermost nozzles of a spray bar are operated by dedicated control channels to permit better spray patterns.
摘要:
An electromagnetic valve (100) for controlling flow of a pressurized liquid, comprises a plunger (110), which is able to move from a closed, downstream position, in which an end of the plunger (110) contacts a valve seat (120), to an open upstream position, in which the plunger (110) does not contact the valve seat (120). Hence an opening is left open for fluid flow, wherein the movement of the plunger to the open position is controlled by energizing a first coil (140). A second coil (130) arranged to pull the plunger (110) towards the closed position upon energizing.
摘要:
An electronically controlled valve (100) for supplying a controlled amount of fountain solution (FS) or cleaning agent to rollers in a printing machine includes sensing means (200, 220E, 220R, 230, P) for providing an output signal, when the valve (100) is open.
摘要:
In order to keep a spray nozzle (3) in a printing press spray beam (1) clean, air with a certain overpressure is supplied to a cover (5; 13; 24) surrounding the spray nozzle (3), the spray cone from the spray nozzle leaving the cover undisturbed through a slot (7; 16; 26) therein.
摘要:
An air cap for keeping a spray nozzle with a flat spray clean is presented. The air cap contain the nozzle and has a slit for the spray from the nozzle, through which opening an air flow is flowing in the same direction as the flat spray from the nozzle. The air cap is divided into a back component comprising an internal thread, and a front component comprising the slit. The components are rotatable relative to one another.
摘要:
An air cap for keeping a spray nozzle with a flat spray clean is presented. The air cap contain the nozzle and has a slit for the spray from the nozzle, through which opening an air flow is flowing in the same direction as the flat spray from the nozzle. The air cap is divided into a back component comprising an internal thread, and a front component comprising the slit. The components are rotatable relative to one another.
摘要:
A blanket washer for the cleaning of cylinders in a printing press comprises a cleaning unit containing rolls for a cleaning cloth, which is to be transferred past an external pad unit on the cleaning unit. The cleaning unit has a front profile for the mounting of one or more pad units in different positions thereon.
摘要:
A spray dampener for a printing press has a row of spray nozzles (5) for spraying liquid on a roller (3). A shutter device (14) for mechanically screening off part of or the whole spray cone is arranged at a nozzle towards the end of the roller. The shutter device is a shield (14), attached to a shaft (11) rotatably arranged at the side of the nozzle facing the end of the roller.
摘要:
A sprayer assembly comprises a nozzle section and a valve section. The nozzle section includes a valve housing having a valve element at its front end defining a spray outlet, and a valve seat inserted into its rear end. The valve section includes a plunger reciprocably mounted in a solenoid, and a valve stem mounted coaxially in a front end of the plunger for engaging the valve seat. The valve stem can be replaced by removing the valve section and pulling the stem out of the plunger.