Reclosable storage bag

Details Reclosable storage bag Reclosable storage bag

B - Operations, Transporting

65

D

B65D 33/28 (2006.01) B29C 65/18 (2006.01) B29C 65/74 (2006.01) B31B 1/25 (2006.01) B31B 1/64 (2006.01) B31B 19/90 (2006.01) B65D 33/16 (2006.01) B65D 33/24 (2006.01)

Patent

CA 2225451

A reclosable bag (100) includes a detachable reclosure tie (110) having a tail portion (120) formed by a series of spaced elongated seals (116, 117) and a closed loop (121). Apparatus for forming the reclosure tie with a bag includes first and second sealing jaws (150) with external (153, 155) and internal grippers (162L, 162R, 163L, 163R) for holding web material (151). The first sealing jaw carries cutting and perforating knives (157, 160) and a cooling block (165L) that directs cooling air onto the knives to prevent the knife temperature from rising to the melting temperature of the web material. Each sealing jaw contains a heating block (164L, 164R) with complementary sealing surfaces (104R, 105R) for forming various seals including the seals that form the tail portion of the reclosure tie.

Un sac refermable (100) comporte un lien de refermeture détachable (110) dont la partie terminale (120) est formée d'une série d'éléments de scellement allongés, espacés (116, 117) et d'une boucle fermée (121). L'appareil permettant de former le lien de fermeture d'un sac comprend des première et seconde mâchoires de scellement (150) pourvues d'éléments de préhension externes (153, 155) et internes (162L, 162R, 163L, 163R) qui retiennent le matériau en bande (151). La première mâchoire de scellement supporte des lames coupantes et perforantes (157, 160) et un bloc de refroidissement (165L) qui dirige l'air de refroidissement sur les lames pour empêcher que la température de celle-ci s'élève jusqu'à la température de fusion du matériau en bande. Chaque mâchoire de scellement renferme un bloc chauffant (164L, 164R) à surfaces de scellement complémentaires (104R, 105R) qui servent à former divers éléments de scellement, y compris ceux qui forment la partie terminale du lien de fermeture.

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