Patent ID: 7938729

Claim:
A frictional clutch for a hand-held device for transferring a film from a backing tape onto a substrate, the clutch comprising: a first main member having a cylindrical element coaxially protruding into a circular center opening of a second main member, wherein the first and second main member are supported such that they can carry out a relative rotational movement, wherein the second main member comprises coaxial tensioning elements for holding and pre-tensioning an elastic ring guided around the tensioning elements, wherein the tensioning elements are geometrically arranged such the ring is exposed in the form of at least one secant-shaped leg in the center opening, and wherein the secant-shaped leg of the ring is biased radially outwards when the cylindrical element of the first main member is inserted into the center opening of the second member in order to produce a frictional force between the ring and the circumferential wall of the cylindrical element.