Process and device for making fabrics with non-woven pile

Abstract

A process for making fabrics with non-woven pile where a continuous thread or band is fed to a parallel passage having two parallel support bands each carrying a layer of adhesive. The thread or fabric is prefolded with a flexible bladelet and then driven with a substantially circular movement by folder blades against the support band. After having produced the desired adhesive connection of the fabric and the band, the adhesive is cured and the support bands are separated to produce the finished product.

That which is claimed is: 
     
       1. A process for manufacturing fabrics with non-woven pile such as carpets and velvet comprising coating on one side only two continuous support bands with a layer of adhesive; displacing these support bands in a passage in which they lie substantially parallel to one another at a predetermined distance from one another so that the adhesive layer carried by one of the support bands faces the layer carried by the other support band; feeding at least one continuous element to the passage; alternately prefolding the continuous element with a flexible bladelet to displace the continuous element adjacent the adhesive support band; alternately driving the pre-folded continuous element by folder blades against the adhesive layers carried by the support bands when the latter are displaced at the entrance to the passage in such a manner as to apply the continuous element alternately against these adhesive layers and to fold it zigzag, each folder blade being in contact with the continuous element during said driving, at a point fairly distant from the fold which has just been formed, and at a distance approximately equal to the separation of the adhesive layers situated in the passage, the distance between the contact point and the previous fold being measured along the element and in the longitudinal direction thereof, ensuring the hold of at least one of the adhesive layers and separating the support bands from one another. 
     
     
       2. A process as claimed in claim 1, comprising at the moment of applying a folder blade against the continuous element to drive the latter against the corresponding band, transmitting to the edge of this blade in contact with this element a substantially circular movement about the edge of the pre-folder bladelet controlled by the blade, until this edge reaches the band. 
     
     
       3. A process for manufacturing non-woven pile fabrics such as carpets and velvet comprising the steps of coating a face of each of two support sheets with a layer of adhesive; moving the support sheets in spaced relation with their adhesive layers opposed; feeding at least one continuous element into the space between said layers; deflecting the continuous element alternately toward the adjacent adhesive layers; driving the deflected element against the adhesive layer toward which it is deflected to attach the element alternately to the adhesive layers in folded configuration, said element being driven by pushing the element alternately on opposite sides thereof at a point along the element whose distance from the previous point of attachment of the element to the adhesive layer is approximately equal to the separation distance of the adhesive layers; ensuring the hold of the continuous element by at least one of the adhesive layers; and separating the layers from each other. 
     
     
       4. A process as defined in claim 3 wherein the continuous element is deflected by contact by a pair of opposed movable bladelets located on opposite sides of the continuous element, the deflected element is driven against the adhesive layers by alternately being contacted by moving folding blades positioned on opposite sides of the element, and wherein the continuous element is driven against the adhesive layers by transmitting to the edge of the folding blade in contact with the element a substantially curvilinear movement about the edge of the bladelet displacing the continuous element until the edge of the blade reaches the adhesive layer. 
     
     
       5. A process for manufacturing non-woven pile fabrics such as carpets and velvet comprising the steps of coating a face of each of two support sheets with a layer of adhesive; moving the support sheets in spaced relation with their adhesive layers opposed; feeding at least one continuous element into the space between said layers; driving the element alternately toward the adjacent adhesive layers to attach the element alternately to the adhesive layers in folded configuration, said element being driven by pushing the element alternately on opposite sides thereof at a point along the element whose distance from the previous point of attachment of the element to the adhesive layer is approximately equal to the separation distance of the adhesive layers; ensuring the hold of the continuous element by at least one of the adhesive layers; and separating the layers from each other.