Abstract: A mechanism for regulating the external surface of an elastically deformable metal shell includes a temperature control for controlling roll sections and thus pressure controlling for controlling bending of a roller. The assembly provides a press roller with one or more pressing members for regulating nip pressure of a press roller against a counter roller. The assembly also provides a suction box with a mechanism for pressing it against a counter roller and a mechanism for pressing the counter roller against the box. The pressing mechanism are pressurized by use of a silicone elastomer compound which is in turn preferably pressurized by heating.

Abstract: Apparatus for applying a stamping foil imprint to a web of flexible material comprises a main applicator roller and at least one backing roller co-operable with the main roller to press the web and the foil together, The at least one backing roller has an inner sleeve means and an outer sleeve means which is concentric with respect thereto. Between the inner sleeve means and the outer sleeve means is a gap in which there is arranged at least one elastically yielding annular compensating member which presses against the inner and the outer sleeve means.

Abstract: A printing cylinder for a rotary printing press has a support, which is fixed against relative rotation, and a jacket rotatable around the latter, which is supported by a row of support elements, disposed axially side-by-side and individually controllable and radially displaceable at least in part in order to attain an even printing pressure across the width of the cylinder while avoiding any bending of the jacket. The jacket is constructed of three coaxial tubes, an interior tube, a filler body and a printing forme support, at least two of which, or even all three, in the rest state, are separated by a small gap so that they can be easily pulled off each other and exchanged in order to change the printing press over to another print pattern or another diameter or register.

Abstract: The invention relates to a sag-compensation roll having a roll shell (1), a stationary yoke (2), and an oblong hydrostatic pressure shoe (8) which can be tilted about a longitudinal axis and contains hydrostatic pressure pockets (11, 12). The pressure shoe is fitted to the inside diameter of the roll shell (1) and is attached to a radially movable oblong piston (4) which is sealed off from the yoke (2). The longitudinal ridges (9, 10) which define the individual hydrostatic pockets (11, 12) have a width (a, b) equal to at most 1/20 of the width (K) of the piston. The pressure shoe (8) is hydraulically supported over the main part of its width on its lower side, i.e. the side which faces the yoke (2).

Abstract: A press roll for forming a controlled press nip with an opposed roll, such as in a papermaking machine, including a rotatable roll shell with a support shaft extending axially through the roll shell and controllable hydrostatic support elements positioned between the roll shell and shaft for applying a controlled radial supporting force to the roll shell with the nip line of the roll shell forming a support plane with the axis of the shaft, and an end guide accommodating relative movement between the shaft and the roll shell in the support plane with the end guide including a V-shaped projection at each end of the shaft and on each side of the shaft, and adjustable blocks carried on the roll shell by self-aligning bearings slidable against the end guide on the shaft.

Abstract: A press roll in cooperation with a mating roll defines a roll nip for the treatment of a moving web of material with the press roll and mating roll being oriented to provide a non-vertical pressing plane. The press roll includes a rotatable roll casing and a yoke located within the roll casing. The roll casing and the yoke defining an intermediate space therebetween. Certain press roll parameters such as the dimensions and material of the roll casing and the yoke and/or the degree of filling of the intermediate space with a liquid are selected such that gravity induced flexures of the roll casing and the yoke occurring in a median plane perpendicular to the pressing plane are approximately equal.

Abstract: In a deflection controlled roll (1) having a non-rotatable carrier (4), a rotatable roll jacket (7) is supported against the carrier (4) by a number of hydrostatic supporting elements (8) with adjustable pressing force. The supporting elements (8) run in corotating bearing races (9) mounted loosely in the roll jacket (7) and corotating with the roll jacket (7) but independently therefrom. These bearing races (9) are provided on both sides with flanks (15) for axial positioning, which cooperate with side bearing pockets on the supporting element (8) and form an axial guideway for the bearing race (9). Automatic positioning with maintenance of a defined bearing gap is achieved by a toroidal cross-sectional or a tapered ring-shaped construction of the running surfaces of the supporting element (8) and the bearing race (9).

Abstract: A flexure compensated roll comprising a rotatable roll shell around a longitudinally extending support therethrough. A longitudinally extending press shoe supported on the support. A piston movably supported on the support above a sealed pressure space. The piston has a saddle toward the interior of the roll casing. The shoe has a middle pressure chamber fluid connected with the pressure space of the piston. The shoe also has rows of hydrostatic pockets on both circumferential sides of the middle chamber. These are supplied by narrowed choke passages with hydraulic fluid. The supply of hydraulic fluid to the hydrostatic pockets bypasses the piston pressure space and/or the middle chamber and is from a pressure source to the hydrostatic pockets without pressure regulation. A regulating valve controls the force between the longitudinal support and the casing of the roll by setting the pressure in the middle chamber and by setting the pressure in the piston pressure space.

Abstract: The invention concerns an adjustable-crown roll having a stationary roll axle which is supported on the machine frame by means of articulated bearings, and a roll mantle which is arranged to revolve on the axle. Hydrostatic loading members or an equivalent pressure fluid chamber or series of chambers are arranged in the space between the axle and the roll mantle. By means of the loading members or equivalent, the profile of a nip formed with a counter-roll of the roll is regulated. A support bushing arranged concentrically with the roll mantle is attached to one end of the roll mantle and revolves along with the roll mantle. A bearing is installed on the support bushing. The bearing receives axial forces from the roll mantle and transfers the same to the machine frame through the non-revolving bearing bock or housing of the bearing. The bearing is arranged, in the axial direction, outside the roll, whereby the roll is suitable for use as a hot roll.

Abstract: A calender for surface treatment of material webs, wherein in the event of one sided seizure of an intermediate roller the fixed roller not subject to pressure is adjusted in position at one end such that the asymmetrical linear force profile resulting from the seizure is symmetrically adjusted according to the desired condition in order to optimise processing of the material web.

Abstract: The invention concerns a method and apparatus for regulating the temperature of an adjustable-crown roll. The roll mantle (12) arranged to revolve on the stationary axle (11) of the roll (10) is loaded by passing a pressure medium into a pressure chamber (15) or series of chambers formed between the axle (11) and the mantle (12) so as to correct the deflection of the roll mantle (12). The roll (10) is additionally heated/cooled by passing heating/cooling fluid into the roll (10). The heating/cooling fluid used for the regulation of the temperature of the roll (10) is introduced into the roll (10) so as to be substantially uniformly distributed over the surface area of the roll (10) such that heat is removed or produced in the radial direction of the roll.

Abstract: A self-loading controlled deflection roll for forming a controlled pressure nip with another roll along a nip line with a hollow rotatable roll shell rotatable on an axis and a roll shaft extending through the shell and radially supporting the shell along the nip line with axially facing surfaces on the shaft and rollers rolling on said surfaces supported on the rotating roll shell accommodating bending of the roll shaft relative to the roll shell fixing their relative axial positions. One roller is axially fixed and the other roller is mounted on a rocker arm loaded with the piston and cylinder.

Abstract: In the plastic foil-producing apparatus where a fluent plastic mass is cooled in a roll nip between a roller member and a counter roller to a defined predetermined solidification temperature, the roller member includes a non-rotatable support member and a rotatable roller shell supported at the non-rotatable support member by one or more support elements. The roller shell includes a plurality of coaxial zones, namely, an inner soft rubber zone and a thin outer metallic zone possessing good thermal conductivity, for example, formed of copper or silver or alloys thereof, the outer surface of which is mirror smooth, for instance, chromium plated. The roller surface is cooled by cooling gas nozzles regulated by a temperature sensor, so that the temperature of the roller member in the roll nip assumes an exactly defined temperature.

Abstract: A controlled deflection roll for use in calenders and like machines has a non-rotatable carrier for a hollow cylindrical shell the end portions of which are rotatable on bearings and the central portion of which surrounds hydraulically operated shell deforming elements. A first hydraulic circuit is provided to supply heated oil to the deforming elements, and a second hydraulic circuit serves to feed lubricant to the bearings. The two circuits are separated from each other by thermal barriers which are installed between the shell and the carrier intermediate the deforming elements and the bearings. Valves and/or flow restrictors are provided in the second circuit to vary the rate of feed of lubricant to and/or the flow of lubricant from the bearings. This renders it possible to establish a desired temperature profile along the full length of the peripheral surface of the shell.

Abstract: A roll for use in a calender or a like machine has a carrier which is surrounded by a flexible cylindrical shell. One or more hydrostatic displacing units are installed between the carrier and the shell to deform, when necessary, one or more selected portions of the shell. Each displacing unit has a bearing element with an external surface which is closely adjacent the internal surface of the shell and has one or more pockets for reception of a heated pressurized hydraulic fluid. Each bearing element has a second surface which faces away from the external surface, and the respective displacing unit further comprises one or more plenum chambers adjacent the second surface of the bearing element. The pocket or pockets of the bearing element receive heated fluid from a first source, and the plenum chamber or chambers of the bearing element receive compressed oil or another hydraulic fluid from a second source which can include one or more parts of the first source or vice versa.

Abstract: In a roll arrangement having a material web travelling between a controlled deflection roll and a counter roll, an increased edge compression of the material web at the edges is prevented in that there are provided additional spreading elements effective transverse to the pressing plane (E), which elliptically deform the roll shell, and thus, cause a reduction of the pressing force of the hydraulic support elements which are effective in the pressing plane. By means of a control device, e.g. partition walls which are synchronously axially displaceable by spindles there is achieved the result that upon altering of the working width only the required support elements receive pressurized medium, and equally, only the spreading elements located externally of the working width.

Abstract: A self-loading type of controlled deflection roll includes, in a preferred embodiment, a pivot assembly which is pivotally mounted to a support shaft near either end of the roll. The roll includes a roll shell having an extension attached to either end which extends co-axially outwardly from the roll shell. These axial extensions of the roll shell are supported by non-self-aligned bearings on the pivot assemblies near either end of the roll. Intermediate the end of the roll shell and the bearings is a heat barrier which prevents hot hydraulic fluid within the interior of the roll from contacting or heating the bearings which rotatably support the roll shell about the self-loading assembly. The bearings can, therefore, be provided with a lubricant which is sealed and shielded from the temperature of the hydraulic fluid within the roll.

Abstract: A roller for compressing of webs of material comprises a rotating hollow roller traversed lengthwise by a stationary crosshead. Hydraulic loading devices in the form of sealing members act on the inside circumference of the hollow roller and delimit hydrostatic bearing pockets to which hydraulic pressure fluid can be supplied. The extension of the sealing members is limited by head bolts, which make it possible to position the hollow roller relative to the crosshead during operation.

Abstract: A deflection controlled roll has a rotatable shell supported on a non-rotating central beam by a plurality of individual shoes which are positioned transversely of the beam between the beam and the shell. A curved semicylindrical surface of the shoe bears against an inside surface of the shell and is hydrodynamically lubricated by an oil film, in the nature of a plain bearing. The shoes are biased by inflatable air lift bellows which are positioned within recesses within the shoe, between the shoe and the beam. The shoes are mounted on the beam on pins which provide at least three degrees of freedom of movement. An improved drive for the roll shell has a cog belt sheave mounted on the shell in concentric relation to one of the shell support bearings. A cog-type drive belt is threaded on the sheave, and a drive pulley for the drive belt is positioned normal to the direction of shell deflection such that the deflections do not change the spacing between the pulley and the sheave.