Friction core holder
OwnerGlenn E. Randolphinventor
Life of this patent
Estimating the term…
Abstract
A core holder for a winding apparatus for winding webs of material in the paper, printing, and textile industries, including a rotatable core-receiving spindle or mandrel, and a segmented friction core holder, expandable outwardly at selected points, by which the core is tightly gripped when the mandrel is turning, and which readily releases its grip on the mandrel upon a simple manual maneuver by the operator, and is readily removable with little force. The core holder assembly is round, but the mandrel-receiving hole has segmented arcs which are not concentric with the outer surface of the core holder, creating stops which limit the movement of the segments about the mandrel.
Claims21
Apparatus for holding a coiling tube on to a mandrel, said mandrel having longitudinal flat surfaces, said apparatus comprising a plurality of arcuate tube insert segments, each of said segments having an inner arc, an outer arc, and two end sections defining the entire peripheral edge of the segment, each of said inner arcs and said outer arcs having a corresponding center point defining a circle upon which each of said inner and outer arcs lie respectively, wherein the centerpoint of said inner arc and the centerpoint of said outer arc are offset by a predetermined distance of from about 0.015 to about 0.35 inches, whereby when said arcuate segments are mated, the peripheral edges abut to form stops that limit the relative rotation of the mandrel and the apparatus.
Apparatus for holding a coiling tube having a resilient surface onto a mandrel, said mandrel having opposed longitudinal planar surfaces, said apparatus comprising a pair of semi-circular tube insert segments, each of said segments having an inner arc, an outer arc, and two end sections defining the entire peripheral edge of the segment, each of said inner arcs and said outer arcs having a corresponding center point defining a circle upon which each of said inner and outer arcs lie respectively, wherein the centerpoint of said inner arc and the centerpoint of said outer arc are offset by a predetermined distance, whereby when said arcuate segments are mated and engage said mandrel, the segments have a first orientation in which the peripheral edges abut to form stops that limit the relative rotation of the mandrel and the apparatus, and a second orientation in which the peripheral edges abut to form a generally round outer periphery.
Dependencies are inferred from the claim text.