摘要:
An apparatus for the vertical adjustment of combined front/top lays in a sheet processing machine includes a front/top lay carrier shaft carrying the front/top lays jointly in such a way that it can be pivoted with respect to a front/top lay drive shaft, or thrust joints disposed in carriers or coupling links for the front/top lays in such a way that they effect a lengthening of the carriers or coupling links in order to adjust the front/top lays. A sheet-fed rotary printing press having the apparatus, is also provided.
摘要:
A web printing system automatically detects the location of a wrinkle in a moving web. The web has a plurality of marked reference positions including an inboard position, a center position, and an outboard position. A plurality of contact image sensors detect the reference positions after the web passes through a spreader and an inboard distance and an outboard distance are respectively measured from the center position. If the inboard distance is less than a nominal inboard distance, the wrinkle is identified as inboard of the center position. If the outboard distance is less than a nominal outboard distance, the wrinkle is identified as outboard of the center position. The machine operator is notified of the fault condition and takes action to remedy the situation.
摘要:
A method is used to set a contact pressure between a displaceable roller and another roller or for moving the displaceable roller with respect to the other roller. At least one actuator is subjectible to the action of a pressure medium and presses the displaceable roller toward the other roller with an adjustable force. The pressure of the pressure medium can be adjusted by a valve. A switchover device is provided for use in connecting the valve to different actuators, as desired.
摘要:
A process is provided for printing a graphic image onto a cue sports cloth to form a cloth layout including a bed cloth and cushion cloths. The process comprises supplying the desired dimensions of the bed cloth and cushion cloths to a digital computer, accessing a digital image, and scaling and dividing the digital image to enable the image to be printed onto a cloth, with part of the image on the bed cloth and part of the image on at least one of the cushion cloths. The image is then printed onto the cloth using a digital printing apparatus and suitable inks to create a piece of printed cloth having on it a series of image portions making up the bed cloth and the cushions. When separated and fitted to the cue sports table, the bed cloth and cushion cloths co-ordinate to create a printed image having a portion of the said image on the bed cloth and a co-ordinating portion of the image on at least one cushion cloth.
摘要:
Device for correctly-registered feeding of sheets supplied thereto in a sheet stream in a sheet transport direction, to front lays of a sheet-processing machine having a lateral pulling device, and a sheet-advancing device disposed within a smallest format width to be processed. The feeding devices includes at least one permanently driven drive roller disposed in the vicinity of the front lays, and at least one contact pressure device cooperatively engageable with the at least one drive roller. The drive roller has a rotational axis directed crosswise to the sheet transport direction, and at least part of the drive roller is disposed laterally of the sheet advancing device.
摘要:
The device has a sheet-transfer cylinder (2) with a movable setting plate (3) which bears the sheet grippers (4) and whose lateral ends are individually adjustable during each revolution of the transfer cylinder (2) with the aid in each case of a roller lever (9) in the circumferential direction in such a way that the sheet transferred to the impression cylinder is in a position which corresponds to the precise printing register. For this purpose, each roller lever (9) mounted movably on the transfer cylinder (2) is guided in a guide path (15c), surrounding the cylinder axis (1) in an annular manner, of an actuator (15, 16) which is suspended pivotably above the cylinder axis (1). Said actuator is provided with individually adjustable stops (19a, 19b) which, by interaction with peripheral cams (24a to 24d) pivot the relevant actuator (15, 16) by a predeterminable amount during each revolution of the transfer cylinder (2) and thus displace the relevant end of the setting plate (3).
摘要:
Device for aligning a leading edge of sheets includes a plurality of front lays cyclically movable into an operating position. Also included are an aligned engagement member engageable by the plurality of front lays, and a force-storage device for bringing the plurality of front lays into engagement with the engagement member in the operating position of the plurality of front lays. A device, which is independent of the engagement member ,is also provided for diabling individual front lays of the plurality of front lays from engagement with the aligned engagement member.
摘要:
Apparatus for forming a sheet delivery pile in a printing press, the apparatus including a sheet receiving surface for the formation thereon of the sheet delivery pile, a rotatable shaft, a sheet stop member attached to the rotatable shaft and extending along the leading edge of the sheet delivery pile, a lever member attached to the rotatable shaft, an oscillation device for reciprocally oscillating the rotatable shaft between a first position wherein the sheet stop member is in contact with the leading edge of the sheet delivery pile and a second position wherein the sheet stop member is out of contact with the leading edge of the sheet delivery pile, and a biasing arrangement for biasing the sheet stop member in a direction from the second position and towards the first position.
摘要:
A device for conveying and aligning a sheet in a sheet-processing machine, with at least one frictionally driven ball having a dome facing towards the sheets for engaging a broad surface of the sheet and for moving the sheet in its plane includes structure for supporting the ball so that it is rotatable in all directions about a fixed mid-point thereof, and at least two frictional-force transmission locations located at the periphery of the ball and disposed at least 90.degree. from one another.
摘要:
A remotely controllable adjusting device for elastically deforming a register rail in a substantially tangential direction of a sheet-guiding cylinder mounted in side walls of a sheet-fed printing machine, the sheet-guiding cylinder being preceded by a sheet-feeding device which accelerates the sheet to be printed to a speed greater than the peripheral speed of the sheet-guiding cylinder, and which brings the sheet into engagement with front guides of the register rail which is acted upon by the adjusting device operating against spring elements for elastically deforming the register rail includes a drive device arranged in the sheet-grinding cylinder and engaging deformingly with the register rail substantially in the longitudinal middle of the register rail, an axially adjustable profile rod having a first end for adjusting the drive device, the profile rod being disposed in the rotational center of the sheet-guiding cylinder, fixed against rotation relative to the cylinder, and having a second end accessible from outside a side wall of the printing machine, and adjusting elements arranged on the side wall for acting upon the second end of the profile rod outside the side wall for axially displacing the profile rod.