Abstract: A former section including a headbox, a felt, a wire, a forming roll having a suction zone and a forming section, and a gap section defined by the section between the headbox and a position where the felt and the wire are brought together at the forming roll. The headbox distributes a pulp slurry into the gap section to be sandwiched by the felt and the wire to form a paper sheet. A bottom side of the paper sheet contacts the felt and a top side of the paper sheet contacts the wire, and the sandwiched felt, paper sheet and wire wrap around the forming roll. A press roll forms a nip with the forming roll through which the paper sheet is carried by the felt and the wire, and the suction zone of the forming roll is arranged in a section around the nip.

Abstract: A former section including a headbox, a felt, a wire, a forming roll having a suction zone and a forming section, and a gap section defined by the section between the headbox and a position where the felt and the wire are brought together at the forming roll. The headbox distributes a pulp slurry into the gap section to be sandwiched by the felt and the wire to form a paper sheet. A bottom side of the paper sheet contacts the felt and a top side of the paper sheet contacts the wire, and the sandwiched felt, paper sheet and wire wrap around the forming roll. A press roll forms a nip with the forming roll through which the paper sheet is carried by the felt and the wire, and the suction zone of the forming roll is arranged in a section around the nip.

Abstract: The present invention relates to a loading device for a shoe press having a shoe press roll (1) and a mating roll (2) for forming a press nip, preferably in a dewatering device such as in a papermaking machine, through which press nip at least one paper web is guided for dewatering. The shoe press roll (1) has at least one press shoe (4) and at least one supporting device (5), and the press shoe (4) and the supporting device (5) are connected by a multiplicity of hydraulic devices, in order to load the press shoe (4). The invention is characterized in that the hydraulic device has at least one first guide element (7) for guiding a cylinder sleeve (8) substantially linearly, and the cylinder sleeve (8) engages at least in sections into at least one second guide element (9) which is connected to the press shoe (4) in a substantially stationary manner.

Abstract: The present invention relates to a loading device for a shoe press having a shoe press roll (1) and a mating roll (2) for forming a press nip, preferably in a dewatering device such as in a papermaking machine, through which press nip at least one paper web is guided for dewatering. The shoe press roll (1) has at least one press shoe (4) and at least one supporting device (5), and the press shoe (4) and the supporting device (5) are connected by a multiplicity of hydraulic devices, in order to load the press shoe (4). The invention is characterized in that the hydraulic device has at least one first guide element (7) for guiding a cylinder sleeve (8) substantially linearly, and the cylinder sleeve (8) engages at least in sections into at least one second guide element (9) which is connected to the press shoe (4) in a substantially stationary manner.

Abstract: Apparatus for forming an extended nip between a mating roll and a shoe roll for treating a product web, in particular a paper web, the roll axes of which lie in a loading plane E, having a mating roll which is supported via in each case one roll-end assembly on in each case one bearing in a first bracket, having a shoe roll which has stationary bearing journals which are supported in each case via a bearing in in each case one second bracket, one of the brackets being fastened to a stand, and having releasable devices for connecting the brackets to one another, the releasable connecting elements comprising connecting lugs which are guided displaceably in grooves of one of the brackets between a locked position and at least one unlocked position along connecting axes, each connecting lug having a slot which extends parallel to a connecting axis and through which fastening pins which can be inserted in the locked position into one and the other bracket can be inserted and can be brought into engagement with opp

Abstract: Roll-changing tool having a dismantling device which can be supported on a rolling machine by a hook and which, on a carrier, has a lifting device mounting and a roll holder for a roll journal of a roll, the carrier having a trolley which can be moved in its longitudinal direction into the region of its head, carries the roll holder, whose holding opening faces the head and is located underneath the carrier, and the hook, which opens at the bottom, being fixed to the head of the carrier with a shaft extension ending in a projecting manner transversely with respect to the running direction of the trolley.

Abstract: Roll-changing tool having a dismantling device which can be supported on a rolling machine by a hook and which, on a carrier, has a lifting device mounting and a roll holder for a roll journal of a roll, the carrier having a trolley which can be moved in its longitudinal direction into the region of its head, carries the roll holder, whose holding opening faces the head and is located underneath the carrier, and the hook, which opens at the bottom, being fixed to the head of the carrier with a shaft extension ending in a projecting manner transversely with respect to the running direction of the trolley.

Abstract: Apparatus for forming an extended nip between a mating roll and a shoe roll for treating a product web, in particular a paper web, the roll axes of which lie in a loading plane E, having a mating roll which is supported via in each case one roll-end assembly on in each case one bearing in a first bracket, having a shoe roll which has stationary bearing journals which are supported in each case via a bearing in in each case one second bracket, one of the brackets being fastened to a stand, and having releasable devices for connecting the brackets to one another, the releasable connecting elements comprising connecting lugs which are guided displaceably in grooves of one of the brackets between a locked position and at least one unlocked position along connecting axes, each connecting lug having a slot which extends parallel to a connecting axis and through which fastening pins which can be inserted in the locked position into one and the other bracket can be inserted and can be brought into engagement with opp

Abstract: Apparatus for forming an extended nip between a mating roll and a shoe roll for treating a product web, in particular a paper web, the shoe roll having a stationary support and a flexible roll cover which can rotate around the beam and which, in the region of the extended nip, is supported on a pressure shoe arranged on the support and whose ends are fixed on both sides in antifriction-mounted rim discs which are mounted via axially displaceable bearing rings on bearing sleeves fixed to the supporting element, bearing sleeve and bearing rings in each case forming an axially and double-acting cylinder/piston unit, whose pressure chambers are connected to pressure lines for an ability to move the bearing rings axially when pressure medium is applied.

Abstract: A roll having bending control has a rotating hollow roll and a non-rotatable crossbeam penetrating the hollow roll lengthwise. Arranged on the crossbeam in an axially parallel row, closely following one another, are supporting elements which can be actuated independently of one another by fluid pressurized medium. Supply lines are attached via angle units to a bar-type carrier which is fastened to the crossbeam by means of screws that can be manipulated from the outside. The screws have longitudinal bore holes through which the respective supply line is directly connected to the respective supporting element.

Abstract: A roller with controllable sag is provided with a revolving hollow roller and a non-rotating crosshead that crosses the hollow roller along its length and on which the hollow roller is supported by a series of supporting elements that are actuated by a pressure medium. Separate supply lines (13) lead to the supporting element and open out into a collection head (40) at the end (10') of the crosshead, to which the outer connection lines (53) are connected. The connection head (40) comprises a double-disc rotary slide valve (50) by which the lines (13, 53) can be interrupted and which in the closed state can be separated at a separation surface (47). The individual discs (51, 52) of the double disc rotary slide valve (50) keep both the supply lines (13) and connection lines (53) closed, thus facilitating replacement of the roller as and when required.

Abstract: A device for operating a gas discharge lamp (11) which is triggered by pulses which are transmitted by a starting device (14). In order to isolate the electrical components of a ballast (12) or a power supply apparatus (10) during the starting process, a reactor (13) which is constructed as a saturable reactor is provided in the ballast. The inductance of the saturable reactor is reduced by the operating current flowing after starting of the lamp (11). The device according to the invention is particularly suitable for starting high-pressure gas discharge lamps, the starting power of the lamp (11) made available by the starting device (14) being made virtually completely available.