Reclosable bags, apparatus and method
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United States of America Patent
Stats
-
Oct 26, 1982
Grant Date -
N/A
app pub date -
Jul 30, 1980
filing date -
Aug 6, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus are provided by which bag forming material is obtained by feeding sheet material (2) together with male and female closure elements (5, 6) to a nip between guide roller (3) and pressure rollers (9, 10) at which adhesive is applied from nozzles (11, 12). The resulting material assembly is fed by drive roller means (14, 15)to an accumulator (16) on a continuous basis and then intermittently over a forming shoulder (21) into a tubular form (22) while maintaining the closure elements (5, 6) at a predetermined distance apart before the forming shoulder (21) by means such as grooves (19) in guide roller (18) and locating the closure elements (5, 6) in predetermined positions facing each other downstream of the shaping shoulder by suitable means (23) which may include rotatable guide elements. The tubular form (22) is drawn through the apparatus by transverse reciprocating sealing bars (26) and a pilfer proof closure can be provided by vertical sealing bars (25).
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