A supply of printable media including a self-locking core. A web of printable media is wound about the self-locking core. The media including a printable surface on first side and an adhesive on a second side. The self-locking core includes a cylindrical body defining a center axis, the cylindrical body having an outer surface and an inner surface. A locking member formed along the inner surface of the body. The locking member extends radially inward towards the center axis and forms a helix having a non-zero helix angle along the inner surface.

A supply of printable media including a self-locking core. A web of printable media is wound about the self-locking core. The media including a printable surface on first side and an adhesive on a second side. The self-locking core includes a cylindrical body defining a center axis, the cylindrical body having an outer surface and an inner surface. A locking member formed along the inner surface of the body. The locking member extends radially inward towards the center axis and forms a helix having a non-zero helix angle along the inner surface.

A durable transfer roll core may comprise an elongate body comprising a groove, the elongate body having an elongate body longitudinal axis. First and second ridges may be on each side of the groove and may be asymmetrical relative to the groove longitudinal axis.

A method for winding a cable (12) onto a cable reel (22) includes providing a cable reel (22) having a drum (24) arranged between two end flanges (28, 30). The drum (24) has a longitudinal axis (26), and the cable is placed (12) on the drum (24) to form a plurality of continuous helical windings (32) on the drum (24). Consecutive windings (32) are directly adjacent to each other, where main bending axes (34) of the continuous helical windings (32) and the longitudinal axis (26) of the drum (24) enclose an offset angle () greater than zero.

The present disclosure relates to a metal foil core including a winding member around which a metal foil is wound, a first protrusion member protruding from the winding member in a first direction (direction of arrow FD) of a first axis direction (X-axis direction), a second protrusion member protruding from the winding member in a second direction (direction of arrow SD) opposite to the first direction (direction of arrow FD) of the first axis direction (X-axis direction), and a first inducing groove formed in the first protrusion member to be disposed between both ends of the first protrusion member in the first axis direction (X-axis direction).

Single layer wrapped helically grooved drum sheaves with non-invariant groove helical angle are disclosed which have zero fleet angle over their entire extent, calculable for any application. These drums can be paired with pulleys rotating parallel to the drum axis, to give complete drum and pulley systems having zero fleet angle over their full range of motion. These drums can alternately be paired with non-rotating cable terminating attachments, to give complete drum and attachment systems having zero fleet angle over their full range of motion. For single layer wrapped drum and pulley cable systems as well as for single layer wrapped drum and attachment cable systems; the present invention enables complete elimination of the service lifespan reduction arising from non-zero fleet angles. Another implementation benefit is reduction in elevator mechanical compartment size using the zero fleet angle tradeoff between drum length and drum to pulley separation.