B - Operations – Transporting – 41 – N
Patent
B - Operations, Transporting
41
N
B41N 1/24 (2006.01) B41C 1/14 (2006.01) B41F 15/36 (2006.01) H05K 3/12 (2006.01)
Patent
CA 2189539
A stencil (25, 38) for depositing and portioning variously thick spot layers of a viscous material. Problems with screen process screens made of metal or polyester webs and with metal stencils may be solved using a solid uniform sheet (38) of synthetic material, preferably polyester with no included threads. The solid polyester sheet is mechanically or thermally perforated at desired points. Since it is solid, the polyester web can withstand greater stress than metal wire webs and at least as much stress as metal stencils.
La présente invention con- ceme un pochoir (25,38) pour le dépôt et le dosage de couches plus ou moins épaisses, à base de points, d'un produit visqueux. Pour remédier aux problèmes rencontrés sur l'écran sérigraphique en toile polyester ou métallique et au pochoir métallique, la présente invention propose d'utiliser une feuille pleine et homogène (38) de matière synthétique et péférentiellement en polyester sans inclusion de fils. Cette feuille pleine en polyester est percée mécaniquement ou thermiquement aux endroits voulus. La toile polyester, du fait qu'elle est pleine, admet des forces de tension supérieure aux toiles à fils métalliques et au moins égale aux pochoirs métalliques.
Bourrieres Francis
Kirby Eades Gale Baker
LandOfFree
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