×

Method for making bag constructions having inwardly directed side seal portions

  • US 6,224,528 B1
  • Filed: 10/12/1999
  • Issued: 05/01/2001
  • Est. Priority Date: 04/11/1997
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for constructing a pouch arrangement having first and second opposed panel sections, said method including:

  • (a) providing first and second continuous webs of panel section material;

    (b) orienting the first and second webs with respect to one another to form a continuous feed of pouch blank with front and back faces and first and second opposite side edges; and

    (c) heat sealing the continuous feed of pouch blank by;

    (i) forming first and second side seals defining a bag construction interior between first and second panel sections;

    said first and second side seals each having an inner edge portion adjacent to the bag construction interior;

    (A) the first side seal inner edge portion having a first section of at least nine inwardly directed projections alternating with a plurality of outwardly directed recesses;

    (1) the first side seal inner edge portion first section extending a distance of at least 30% of a length of a side edge of the first panel section;

    (2) each of the first section inwardly directed projections having a height of at least 0.5 mm;

    (3) each of the first section inwardly directed projections having a length of at least 12 mm;

    (B) the second side seal inner edge portion having a second section of at least nine inwardly directed projections alternating with a plurality of outwardly directed recesses;

    (1) the second side seal inner edge portion second section extending a distance of at least 30% of a length of a side edge of the second panel section;

    (2) each of the second section inwardly directed projections having a height of at least 0.5 mm;

    (3) each of the second section inwardly directed projections having a length of at least 12 mm;

    (d) forming a base gusset member oriented in extension between the first and second panel sections; and

    (e) separating the pouch blank into individual ones of the pouch arrangements by cutting along the first and second side seals.

View all claims
  • 15 Assignments
Timeline View
Assignment View
    ×
    ×