Method and device for producing a textile web by spreading tows
AssigneeSnecma Propulsion Solide
InventorsJean-Michel Guirman, Bernard Lecerf, Alain Memphis
Life of this patent
Estimating the term…
Abstract
After yarns or tows (10) have been pre-spread and placed side by side substantially in a common plane, their surface is swept by at least one jet of air (22) displaced transversely relative to the longitudinal direction of the yarns or tows so as to obtain a substantially unidirectional sheet (20) that is uniform.
Claims16
A method of making a fiber sheet by spreading and juxtaposing yarns or tows, the method being characterized in that after the yarns or tows have been pre-spread and placed side by side substantially in a common plane, their surface is swept by at least one jet of air moved transversely relative to the longitudinal direction of the yarns or tows in such a manner as to obtain a substantially unidirectional sheet that is uniform.
An installation for marking a fiber sheet, the installation comprising at least one device for pre-spreading yarns or tows, and means for driving the yarns or tows side by side downstream from the pre-spreading device, the installation being characterized in that it further comprises at least one device for sweeping by means of a jet of air from a nozzle device, the device being placed beside a path of the yarns or tows downstream from the pre-spreading device, a duct for feeding the device with air under pressure, and a drive member for driving the sweeping device transversely relative to said path.
Dependencies are inferred from the claim text.