Patent ID: 8522739

Claim:
A roller mounting device comprising: a hollow-cylindrical element, in which a cylindrical roller is mounted transversely to a central axis of the hollow-cylindrical element, the cylindrical roller including a pair of front faces on opposite ends of the roller, a rounded cylindrically-shaped rolling surface between the pair of front faces, and a rotational axis extending through each of the front faces at a geometric center of that front face, and a single-member, wire-shaped securing element coupled in a formfitting way to the hollow-cylindrical element, disposed at least partially within an inner chamber of the hollow-cylindrical element in relation to axial and rotational directions on the central axis of the hollow-cylindrical element, wherein the single-member, wire-shaped securing element includes: (a) a pair of front face contacting portions configured to physically contact each front face of the cylindrical roller at the geometric center through which the rotational axis extends to fix the roller along the rotational axis of the roller; and (b) rolling surface contacting portions configured to contact the cylindrically-shaped rounded rolling surface of the cylindrical roller at one or more locations forward of the rotational axis of the roller in a direction along the central axis of the hollow-cylindrical element to restrain the roller along the central axis of the hollow-cylindrical element, which is perpendicular to the rotational axis of the roller.