Roller (1), particularly a castor-type roller, with rotational movement of a running wheel (12), with an operating shaft (20) which passes through a control cam (19) of the roller (1) and on which an electric motor (37) acts via a gear mechanism to operate it, wherein the electric motor (37) acts on the operating shaft (20) by means of an electric motor shaft (39) via a toothed gear mechanism (38), the toothed gear mechanism (38) having a driven gear wheel (41), a hub (40) of which is passed thr...

A roller for thermally treating web-shaped media, comprising a roller body which is rotatable about its central longitudinal axis, and peripheral bores introduced in axial parallel in the roller body, for conveying a heating medium, wherein other axially parallel balancing bores are formed in the roller body in addition to the peripheral bores for the heating medium, said balancing bores running from an end face of the roller body towards the center of the roller body.

A roller machine includes a rotatably mounted roller body which can be placed on or against one counter roller. The roller has at least one axis and at least one spring element which is arranged between the roller body and a machine frame. The spring element is disposed between the roller body and the part of the axis which is used to secure the roller.

A roller is equipped with a pair of crawlers. Each crawler includes a driving wheel detachably attached to a driving shaft. Each crawler also includes a set of driven wheels. Both sets of driven wheels are supported by a connecting member that is detachably attached on a bottom of a body. A roll, which is vibrated only in the perpendicular direction with respect to the ground surface, is attached to the body.

A friction roller is connected, in an articulated manner, in the area of its axis of rotation, to one end of a connecting rod. The second end of this connecting rod is connected, in an articulating manner, to a peripheral portion of a rotatable lever that can be driven. A rotational axis of the lever is situated at an angle with respect to the rotational axis of the friction roller.

A roller is formed of at least two adjacent roller barrels. Each of the roller barrels has its own shaft that defines an axis of rotation for its associated roller barrel. The axes of rotation of the several roller barrels can be independently positioned. A support is located between the two roller barrels and supports the shafts of the two adjacent barrels. This central support is able to be adjusted.

The roller is provided for pressure treatment of a strip of paper, textile, plastic film, sheet metal or similar material. It includes a hollow roller made of a fiber-reinforced synthetic resin material, and a cross-beam which passes through the hollow roller lengthwise. The cross-beam is mounted at its ends, in external supports, so as not to rotate. Hydrostatic support elements are arranged on the cross-beam on the side on which pressure is exerted. The elements can be pressed against the insi...

A roller has a circular disk body having means defining a center aperture disposed in the center thereof and means defining a plurality of retaining groove opening into the circumference of the center aperture and extending parallel to the axis of said center aperture to define bearing roller races, each the retaining groove having a nearly major arc in section effective to retain bearing rollers in the retaining grooves; a plurality of bearing rollers disposed in said retaining grooves; and a s...

A roll is described, particularly a roll for crushing or de-agglomerating different materials. It can be used in all situations where deformations of the roll ends, in association with a constant roll gap, constitute a problem, particularly at high roll loadings. The object of the invention is to further develop a roll of this type so that variable adjustments or a constant roll gap are possible at different operating stages. This object is achieved in that the roll consists of a core and a roll...

Disclosed is a roller with an outer mantle and an inner shaft, the middle part outer diameter of the inner shaft being greater than the outer diameter of its other parts and the outer mantle having been joined by shrinking to the middle part of the inner shaft. The outer mantle parts being supported by the greater diameter middle part of the inner shaft and consisting of two pipes welded together, the ends of the mantle have been thinned on the inside so that their inner diameter is the same as ...