Abstract:
A printing roller for a printing machine, e.g., for a flexographic printing machine, wherein the printing roller includes a rotary and longitudinal axis and an external surface, the external surface being substantially cylindrical and adapted for mounting a plate. The new feature of a printing roller according to the invention is that the external cylindrical surface includes at least one longitudinal groove, where the at least one longitudinal groove includes a geometry with one or more surfaces, the surface or surfaces lying within a circumscribed cylindrical surface for the external surface of the printing roller. In other words, this means that the longitudinal groove or grooves are cutouts in the form of milled or ground grooves in the external cylindrical surface itself on a printing roller.
Abstract:
An apparatus comprises a stacker configured to stack planar workpieces into stacks, and a cutter configured to cut preforms out of planar workpieces. The cutter is located downstream of said stacker on a manufacturing line, and a conveyor exists between said stacker and cutter. The apparatus comprises a conveyor controller, which is configured to, after transferring a stack from said conveyor to a feeder section of said cutter; rewind the conveyor to place a foremost free location after existing stacks on the conveyor to a position where it is ready to receive a stack from said stacker.
Abstract:
A printing unit (1) has a first roller (2) and a second roller (3) provided substantially parallel and facing each other for transporting of printing sheets between the first roller (2) and the second roller (3). The first roller (2) is rotationally mounted at only one end (10) of the first roller (2) and this end (10) is mounted to a deflector (9). The deflector (9) has a connection (11) to a support (12) for resiliently changing the angle of the first roller (2) relatively to the second roller (3) by bending the connection (11).
Abstract:
The present invention concerns an apparatus for conveying a sheet-formed item from a digital printing unit, the apparatus including an inlet side and an outlet side, and including a set of conveying means, e.g. one, two or more longitudinal conveyor belts, for moving items in a conveying direction. The invention also relates to a method for regulating such an apparatus. The new feature of the invention is that the apparatus includes means for aligning an article from one position to another position in relation to one or more reference points, and further includes fixing means for fixing an item at a given position in relation to a stop. The method can include at least the following method steps: detecting an item; activating conveying means for receiving and conveying an item at a second speed; regulating a possible skew position of the item as the item is moved against a stop on the conveying means, where the item is acted on by one speed of the conveyor belt and moved into abutment on the conveying means at a second and lower speed; and where the item is fixed in the obtained and aligned position.
Abstract:
The present invention concerns a printing roller for a printing machine, e.g. for a flexographic printing machine, wherein the printing roller includes a rotary and longitudinal axis and an external surface, the external surface being substantially cylindrical and adapted for mounting a plate. The new feature of a printing roller according to the invention is that the external cylindrical surface includes at least one longitudinal groove, where the at least one longitudinal groove includes a geometry with one or more surfaces, the surface or surfaces lying within a circumscribed cylindrical surface for the external surface of the printing roller. In other words, this means that the longitudinal groove or grooves are cutouts in the form of milled or ground grooves in the external cylindrical surface itself on a printing roller.
Abstract:
An arrangement comprises a stacker configured to stack planar workpieces into stacks, and a cutter configured to cut preforms out of planar workpieces. The cutter is located downstream of said stacker on a manufacturing line, and a conveyor exists between said stacker and cutter. The arrangement comprises a conveyor controller, which is configured to, after transferring a stack from said conveyor to a feeder section of said cutter, rewind the conveyor to place a foremost free location after existing stacks on the conveyor to a position where it is ready to receive a stack from said stacker.
Abstract:
A printing unit with a rotary roller and an ink chamber with an elastic sealing doctor blade (2) which in a curve with decreasing curvature extends from a holder (6) to a tangential point of contact on the surface of the rotary roller. A packing follows the curvature in order to seal between the sealing doctor blade and the ink chamber.
Abstract:
The present invention concerns a method for mounting and dismounting a doctor blade chamber (1) in a support holder (2) on a printing unit as well as an apparatus in which the doctor blade chamber is placed in the support holder in a mounting position and subsequently is brought in contact with a roller (3), preferably an anilox roller, in a position of operation. The new feature of the method and the apparatus is that the doctor blade chamber is disposed with the opening upwards in the support holder, preferably in a horizontal position or in a position at such a small angle that ink does not run out of the doctor blade chamber, and is brought into a position under the roller, after which the doctor blade chamber is brought into contact with the roller and pivoted about an axis coinciding with the rotary axis of the roller, into the position of operation.