Abstract:
A winder for winding a running web on a winding drum having a journal at each end. Each one of a pair of primary levers has a fork at one end for receiving one of the journals. As the roll is progressively wound, the winding drum is swivelable from a first position situated generally above the backing roll to a second position offset from the first position by an angle of about 90 degrees. The winding drum is received from the primary levers at a pair of secondary levers at the second position. A generally horizontal guideway for the drum extends from the second position to a third position. The roll and the winding drum are forced onto the backing roll by a contact pressure device. A driven cam plate is coordinated with each of the primary levers so that a cam plate and the primary lever at least partially pass a primary section between said first and second positions, thereby relieving part of the pressure on the winding drum and roll wound thereon in accordance with the contour of the roll, and according to the distance of travel negotiated from the first position to the second position.
Abstract:
A doctor is provided on a coating device and is fashioned as an oblong doctor bar which from the cross section, transverse to its longitudinal expanse, features an irregular cross section and a coating surface of bow-shaped design which is provided with grooves, as dosing grooves, which extend crosswise or perpendicular to the longitudinal expanse of the bar. The grooves flatten out from their bottom toward the leaving edge of the doctor bar by 10 to 25%, preferably in bow-shaped fashion. Furthermore, they widen in this area making the ribs provided between the grooves disappear. The doctor bar consists preferably of oxide ceramic material, or features on its coating surface a layer from such material.
Abstract:
An intermittently operating unwinding apparatus has a separating device with which a web-end is formed on the lifting-out of an empty spool from the guide ways of an unwind unit. A holding device holds the web-end in a plane which extends parallel to the guide ways, on which a new winding roll located in waiting position rests with its roll axle. The machine has a splicing unit with a cross member arranged parallel to the guide ways to which the beginning of the web of the new parent roll can be joined. During transport of the new parent roll out of the waiting position into its unwinding position the splicing unit is moved by dogs engaging at the roll axle against the holding device and the web-beginning joined to the web-end.
Abstract:
In a winding machine for simultaneously winding strips, which are offset relative to each other and have been slit lengthwise from a web, onto at least two winding rolls, three supporting rollers are provided mounted with their longitudinal axes generally parallel in the machine frame, wherein each pair of adjacent supporting rollers are arranged next to each other such that the winding bed, into which a web strip is supplied from below, extends above the common plane through the center axes of the adjacent supporting rollers. To relieve the weight of the respective rolls, holding assemblies engage the ends of the respective core tubes. Above the central supporting roller, there is an apparatus for ejecting the finished roll over the outermost supporting roller, and thereafter a removal device removes the finished roll. Inserting devices are also provided for placing new core tubes into their respective winding beds. The machine thus described enables rolls of web strips to be automatically changed.