Abstract: A cylinder assembly is provided for transferring foil onto a substrate. A cylinder assembly includes a generally cylindrical core having an outer surface. The outer surface of the core includes a plurality of magnet receiving depressions therein. Magnets formed from rare earth metals are secured within corresponding depressions in the outer surface of the core. A die plate is positioned about the outer surface of the core. A heating structure heats the outer surface of the die plate to a temperature less than 475.degree. F.

Abstract: Apparatus comprising a frame, a pair of generally parallel rolls each having trunnions at its ends journaled for rotation in bearings in the frame with a gap between the rolls, and means for driving the rolls. The rotation of each trunnion in its bearing tending to generate heat which tends to raise the temperature of the trunnions and frame above the ambient temperature. The apparatus includes a cooling system, having a coolant supply manifold and a coolant return manifold, each with a branch for each bearing, and a pump for circulating coolant through each bearing. The cooling system also includes a device for controlling the temperature of the coolant.

Abstract: To control the draw exerted on a web which is being fed to the rolls of a web processing machine, a strain wave gear power transmission device has its power input shaft driven by the main drive shaft of the machine and its output shaft coupled to the rolls including the nip rolls of the machine which draw the web. The wave generator (W.G.) shaft of the device is driven continuously in a single direction and at a higher rotational speed relative to the power input shaft. Encoders provide concurrent pulses at rates indicative of the main shaft and W.G. shaft speeds. The ratio of the pulse ratio is determined and compared to a stored value which corresponds to percent of draw desired. Any resulting error signal is used to change the speed of the W.G. shaft and output shaft. High encoder pulse rates provide for resolving small speed and draw errors. The output shaft of the transmission drives groups of rolls of the machine by way of a plurality of belt drive systems.

Abstract: A magnetic cylinder is formed by stacking ferromagnetic pole disks to which spacer rings are fastened. A circular array of tabs are pierced from the plane of the pole disks. the tabs are angulated relative to said plane and they diverge radially outwardly but their edges terminate on a circle concentric to the rim of the disk to provide a margin on which a concentric spacer ring is applied and is secured to the pole by pressing the tabs back toward the plane of the pole so they wedge tightly against the spacer ring. Permanent magnets are applied to the poles between adjacent pairs of tabs and they form parallel axially extending rows of magnets when the poles are stacked. At least one row is comprised of magnets which are stronger than the other to more forcefully hold down the edges of a die cutting plate of a printing plate which is wrapped around the magnetic cylinder.

Abstract: A magnetic cylinder is formed by stacking ferromagnetic pole disks to which spacer rings are fastened. A circular array of tabs are pierced from the plane of the pole disks. The tabs are angulated relative to said plane and they diverge radially outwardly but their edges terminate on a circle concentric to the rim of the disk to provide a margin on which a concentric spacer ring is applied and is secured to the pole by pressing the tabs back toward the plane of the pole so they wedge tightly against the spacer ring. Permanent magnets are applied to the poles between adjacent paris of tabs and they form parallel axially extending rows of magnets when the poles are stacked. At least one row is comprised of magnets which are stronger than the others to more forcefully hold down the edges of a die cutting plate or a printing plate which is wrapped around the magnetic cylinder.