B - Operations – Transporting – 31 – B
Patent
B - Operations, Transporting
31
B
B31B 1/16 (2006.01) A01G 1/04 (2006.01) B31B 19/90 (2006.01) B31B 39/00 (2006.01)
Patent
CA 2191622
A method and apparatus for manufacturing an improved bag for the cultivation of muschroom spawn is provided. The bags have continuous gas permeable sealing strips (80) sealed to the inside walls of the bags which cover openings (52) in the bags, so as to allow the bags to be vented without loss of moisture. The openings (52) and sealing strips (80) are positioned close to the top and bottom of the bags so as to maximize air flow through the muschroom spawn without creating dry spots, thereby improving spawn yield. The apparatus includes rollers (70, 72) for dispensing plastic film and at least one continuous hydrophobic strip of material (80). A series of apertures (52) are punched by cutting dies (50) in the film, and a vacuum system (60) removes the cut out portions. The strip of material (80) is positioned over the apertures (52) and sealed by sealing dies (90) over them, so as to enclose the apertures (52). A cutting dies cuts off the film and strips (80). A conventional bag making machine forms the bags.
L'invention concerne un procédé et un dispositif de fabrication d'un sachet amélioré servant à cultiver du blanc de champignon. Ces sachets possèdent des bandes de scellement (80) continues et perméables aux gaz, scellées aux parois intérieures desdits sachets et recouvrant des ouvertures (52) du sachet, ce qui permet sa ventilation sans perte d'humidité. Les ouvertures (52) et les bandes de scellement (80) sont placées à proximité du sommet et du fond du sachet, de manière à favoriser au maximum la circulation d'air à travers le blanc de champignon sans création d'emplacements secs, ce qui optimise la production de blanc. Le dispositif comprend des rouleaux (70, 72) servant à distribuer un film en plastique et au moins une bande continue hydrophobe de matériau (80). Une série d'ouvertures (52) est pratiquée dans le film au moyen de poinçons (50) et un système d'aspiration (60) enlève les parties découpées. La bande de matériau (80) est placée au-dessus des ouvertures (52) et scellée au moyen de matrices de scellement (90) situées au-dessus desdites ouvertures (52), de manière à les fermer. Un élément coupant sectionne le film et les bandes (80). Une machine classique de fabrication de sachets réalise les sachets.
Siebert Lester
Sprehe Gregory S.
Towne William
Borden Ladner Gervais Llp
Com-Pac International Inc.
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