Abstract:
For the stiffening of a web-shaped fleece of fibrous material, a stiffening agent is applied to a face of the fleece by means of a cylindrical stencil having internally a squeegee. By keeping the travelling speed of the fleece at least 1 percent higher than the tangential velocity of the stencil, no fibres of the fleece will adhere to the stencil.
Abstract:
By starting from a non-bound fibre fleece one manufactures a composition consisting of a fleece strengthened at the fibre junctions with a stiffening agent and a foil, by taking care to have a discontinuous pattern of said stiffening agent available at the moment of uniting said fleece with said foil; the discontinuous pattern is obtained with a cylindrical screen with internal squeegee.
Abstract:
Method for strengthening a web like fleece of fibrons material by applying a pattern of dots of a stiffening agent upon the fleece by means of one or more cylindrical stencils rotating in the direction of advance of the fleece.
Abstract:
A METHOD FOR THE GALVANO TECHNICAL MANUFACTURING OF A SEAMLESS CYLINDRICAL THIN-WALLED STENCIL TO BE USED IN THE ROTARY SCREEN PRINTING PROCESS, SAID METHOD COMPRISING TWO STEPS VIZ DEPOSITING A LAYER OF NICKEL PRIOR TO, OR AFTER THE DEPOSITION OF A LAYER OF ZINC OR COPPER UPON A CYLINDRICAL MATRIX, SO AS TO OBTAIN A TWO-PLY STENCIL.