CASING MATERIAL AND A METHOD AND APPARATUS FOR ITS MANUFACTURE

• Main Authors: STEFAN ARESKOUG, ANDERS STRALIN, BENGT LINDQUIST
• Format: Patent
• Language: English; Spanish
• Published: 30.09.1997
• Edition: 6
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BANDAGES, DRESSINGS OR ABSORBENT PADS; CUTTING; CUTTING-OUT; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; HAND CUTTING TOOLS; HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PERFORATING; PERFORMING OPERATIONS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; PROSTHESES; PUNCHING; SEVERING; SEVERING BY MEANS OTHER THAN CUTTING; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; STAMPING-OUT; TRANSPORTING; TREATMENT OR PROTECTION OF EYES OR EARS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention relates to a method and to apparatus for perforating a web of material (12) intended to form an outer casing sheet of absorbent articles. As the web (12) is advanced the web is first provided with a large number of mutually separated cuts in the nip defined between raised plateaus (24) on a matrix cylinder (14) and circumferentially extending knife-edges (26) of a cutting cylinder (16). The web (12) is then deformed transversely to its plane at parts which border on each cut. The invention also relates to a perforated outer casing sheet which includes recesses in the form of mutually adjacent elongated channel-like grooves. El invento se refiere a un método y a un aparato para perforar una banda continua de material (12), destinada a formar una lámina de envoltura exterior de artículos absorbentes. Mientras que la banda continua (12) es hecha avanzar, esta banda continua es provista primeramente de un gran numero de cortes mutuamente separados en el espacio de contacto definido entre mesetas elevadas (24) existentes sobre un cilindro de matriz (14) y unos filos de cuchillas (26) extendidos circunferencialmente, de un cilindro cortante (16). Luego, la banda continua (12) es deformada transversalmente a su plano en partes que bordean a cada corte. El invento se refiere también a una lámina de envoltura exterior que incluye uno rebajos en la forma de ranuras a modo de canales alargados, mutuamente adyacentes.