Patent ID: 7773225
Filing Date: 2010-08-10
Classification: B65H,D01G,G01B,G01N

Abstract:
1. A device for the optical analysis of a thread or yarn (F) fed to a textile machine, said device comprising at least one light emitter element ( 3 , 4 ) and at least one receiver element ( 5 ), said emitter element ( 3 , 4 ) generating a light signal which strikes said thread (F) before being sensed by the receiver element ( 5 ) which, based on this sensing, defines a characteristic of the thread (F) such as its movement or its stoppage, a dimensional defect or another dimensional characteristic, wherein, interposed between said light emitter element ( 3 , 4 ) and said receiver element ( 5 ), light transparent means ( 6 ) which are encountered by the light signal after it has interacted with the thread (F), and which act as a thread guide, wherein said light transparent means ( 6 ) are of ceramic material and are transparent to infrared light so that the light emitted is not diffused, and wherein the light emitter elements ( 3 , 4 ) are at least two in number and are oriented such that the thread (F) is always struck by the light emitted by at least one of them.