Abstract:
An elongation cord (10) adapted for the reinforcement of elastomer structures has a polymer core (12) and three to nine strands (14) twisted around the core with a cord twisting step in a cord twisting direction. At least one of the strands (14) has a first group (16) of filaments (17, 18) and a second group (20) of filaments (21, 22). The first group (16) of filaments (17, 18) is twisted with a first twisting step in a first twisting direction and the second group (20) of filaments (21, 22) is twisted with a second twisting step in a second twisting direction. The first twisting step is different from the second twisting step or the first twisting direction is different from the second twisting direction, or both. The first twisting direction is equal to the cord twisting direction and the first twisting step is equal to the cord twisting step.
Abstract:
An extruded polymeric rod is elongated in the solid state by being drawn through a forming device to produce a solid polymeric core having an orientated structure which comprises elongated crystals orientated in the axial direction of the core. The core may also comprise crystals orientated in respective radial directions. The single rod may be replaced by a bundle of rods.
Abstract:
An elastomer rope is disclosed which is useful among other things for clamping goods to the platform of a load carrying vehicle and for mooring boats, floating landing stages, buoys, navigation marks and the like. A mooring device is also shown for anchoring floating landing stages, buoys, navigation marks and the like. The elastomer rope has the property of becoming progressively ever stiffer at increasing elongation and consists of a core of an elastomeric material, a reinforcement wound helically about the core and consisting of a material considerably less elongatable than the elastomeric material of the core, and an outer covering layer of elastomeric material. The progressivity is attained in that the reinforcement is helically wound about the core at a reinforcement angle of 50.degree.-65.degree. between the longitudinal axis of the core and the reinforcement projected at right angles thereto. The mooring device has a floating body connected to a bottom fastening with the aid of an elastic element which is under tensile prestress. The floating body is rigidly connected to a rigid tubular arm which extends downwards from the floating body. The elastic element extends from below into the tubular arm and is fixed to the upper end thereof. The elastic element is such as to become progressively ever more rigid at increasing elongation and consists of an elastomer rope of the above design.
Abstract:
An apparatus for cyclically decelerating and accelerating a ductor roller which has a journal which is mounted on a swing arm for rotation on the arm and is moved with the arm to selectively and alternatively engage the ductor roller with a first roller, such as a fountain roller and a second roller, such as a first roller of a printing press, is employed in inking and damping units of such presses. The apparatus includes a bearing head of the spring arm which provides a rotatable mounting for the journal of the ductor roller and the arrangement includes a planetary gear system connected to the journal and to a free wheel element with a controllable brake acting between the planetary gear system and the bearing head of the swing arm in an arrangement which permits the free wheel element to rotate after the braking system has been engaged to cause the winding or tensioning of a spring, such as a spiral spring, which is disposed between the free wheel element and the journal of the ductor roller.