Patent ID: 7641752
Filing Date: 2010-01-05
Classification: B29C,B29D,Y10T

Abstract:
1. A process for laying a strip on a substantially cylindrical or toroidal receiving surface rotating about a first axis, the process utilizing a laying head having an application device, the laying head being movable translationally along a second axis oriented parallel to the first axis and along a third axis oriented parallel to the line which extends radially from the first axis and substantially passes through a point of contact between the application device and the receiving surface, the laying head being rotatable about a fourth axis oriented substantially perpendicular to the second and third axes and tangential to the receiving surface at the point of contact, the process comprising the steps of: A) continuously depositing the strip on the rotating receiving surface while determining an angular position of the laying head about the fourth axis and while directly sensing the receiving surface by a sensor for assessing a tangency angle formed between a tangent to the transverse profile of the receiving surface at the point of contact and an axis parallel to the first axis, B) during each rotation of the receiving surface in step A, displacing the laying head continuously wherein a distance between two consecutive turns of the strip defines a pitch which is constant; and C) adaptably controlling movements of the laying head about the fourth axis and along the second and third axes during steps A and B as a function solely of the value of the assessed tangency angle, so as to displace the laying head continuously during each revolution of the receiving surface, in a direction substantially parallel to said tangent for achieving said constant pitch between consecutive windings.