D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
D21F 1/10 (2006.01) B29D 29/00 (2006.01) D21F 3/08 (2006.01)
Patent
CA 2522587
A process for forming a belt for a press, such as a shoe press belt, includes the steps of: providing an elongate cylindrical core (20) having a longitudinal axis (A1); rotating the core (20) about the longitudinal axis (A1); providing a nozzle (22) movable along a nozzle path that is substantially parallel to and above the core longitudinal axis, the nozzle (22) having at least an upstream outlet (24) and a downstream outlet (26), the nozzle outlets being longitudinally offset a distance from each other; and applying multiple strips of polymeric material to the core (20) through the nozzle outlets (24, 26) as the nozzle (22) moves along the nozzle path such that the downstream strip forms an overlapping spiral inner layer and the upstream strip forms an overlapping spiral outer layer that overlies the inner layer.
L'invention concerne un procédé de production d'une courroie pour une presse, telle qu'une courroie de presse à sabot, qui consiste à : prévoir un noyau cylindrique allongé (20) possédant un axe longitudinal (A1) ; faire tourner le noyau (20) autour de l'axe longitudinal (A1) ; prévoir une buse (22) mobile le long d'une trajectoire de buse sensiblement parallèle à l'axe longitudinal du noyau et au-dessus de celui-ci, la buse (22) possédant au moins une sortie d'amont (24) et une sortie d'aval (26), les sorties de la buse étant décalées longitudinalement les unes par rapport aux autres ; et appliquer des bandes multiples de matière polymère sur le noyau (20) par les sorties de buse (24, 26) alors que la buse (22) se déplace le long de sa trajectoire, de manière que la bande d'aval forme une couche interne de recouvrement en spirale et que la bande d'amont forme une couche extérieure de recouvrement en spirale recouvrant la couche interne.
Madden Michael D.
Vosika Matthew
Smart & Biggar
Stowe Woodward Llc
LandOfFree
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